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In this compelling episode, we are joined by Dr. Muotri, a leading researcher investigating the intriguing dynamics of cortical organoid development. One of the mysteries of early brain maturation is whether functional network activity follows a fixed developmental program governed by genetics, similar to structural and transcriptional changes. Dr. Muotri's research harnesses human cortical organoids that dynamically change cellular populations as they mature. Over several months, these organoids consistently display increases in electrical activity. Intriguingly, the spontaneous formation of these networks features regular oscillatory events that rely on both glutamatergic and GABAergic signaling. As the organoids continue to develop, these oscillations transition to more spatially and temporally irregular patterns. Remarkably, these synchronous network events mirror features seen in preterm human electroencephalography. These findings suggest that the development of structured network activity in a human neocortex model may follow a stable genetic program. In our conversation, Dr. Muotri sheds light on these fascinating insights, providing new perspectives on the role of network activity in the developing human cortex and paving the way for future explorations in neuroscience.Keywords: Dr. Muotri, Cortical Organoids, Network Activity, Brain Development, Genetics, Glutamatergic and GABAergic signaling, Electroencephalography, Neuroscience.Complex Oscillatory Waves Emerging from Cortical Organoids Model Early Human Brain Network Development https://doi.org/10.1016/j.stem.2019.08.002

Dr. Garin joins us in this episode to explore the intriguing world of the default mode network (DMN) and its relation to cognitive functions in primates. Resting-state fMRI studies reveal distinct differences in the DMN structure across humans and non-hominoid primates like macaques, marmosets, and mouse lemurs. Dr. Garin's research presents compelling evidence that the medial prefrontal cortex (mPFC) in non-hominoid primates does not engage with the posterior cingulate cortex (PCC) as robustly as it does in humans. This finding is particularly significant as the strong correlated activity between the PCC and mPFC in humans is a key feature of the human DMN.However, non-hominoid primates do consistently exhibit a fronto-temporal resting-state network involving the mPFC. Dr. Garin discusses these common functional features shared across non-hominoid primates and their implications for our understanding of cognitive functions in primates.This episode promises to provide fascinating insights into the workings of the primate brain and the evolutionary gap in the organization of the DMN. Tune in for an engaging conversation on neuroscience, primate cognition, and the mysteries of the brain's resting state.Keywords: Dr. Garin, Default Mode Network, fMRI, Non-hominoid Primates, Human Brain, Medial Prefrontal Cortex, Posterior Cingulate Cortex, Neuroscience, Cognitive Functions.https://doi.org/10.1016/j.celrep.2022.110669 Resting-state fMRI reveals DMN structure across four primate species

In this intriguing episode, we are privileged to host Dr. Chatterjee, a renowned expert studying the mechanisms of memory loss in Alzheimer's disease and related dementias (ADRD). Despite extensive research, the underlying causes of memory loss associated with ADRD remain unclear, and effective treatments are currently non-existent.Dr. Chatterjee's groundbreaking work focuses on the nuclear receptor 4a (Nr4a) family of transcriptional regulatory proteins. His team has uncovered that these Nr4a proteins play a crucial role in controlling the transcription of genes that encode endoplasmic reticulum (ER) chaperones. These chaperones are responsible for folding and transporting plasticity-related proteins to the cell surface, which is a critical process in long-lasting forms of synaptic plasticity and memory.Significantly, his research has linked the dysregulation of Nr4a transcription factors and ER chaperones to ADRD. In a promising development, the team found that overexpression of Nr4a1 or the chaperone Hspa5 can help mitigate long-term memory deficits in a tau-based mouse model of ADRD.These exciting findings not only establish a unique molecular concept underlying long-term memory but also offer invaluable insights into the mechanistic basis of cognitive deficits in dementia, opening up potential avenues for innovative therapeutic approaches.Join us as we delve into the details of this fascinating research with Dr. Chatterjee.Keywords: Alzheimer's disease, dementia, memory loss, Nr4a proteins, transcription factors, ER chaperones, synaptic plasticity, Hspa5, long-term memory, Dr. Chatterjee.https://doi.org/10.1126/sciadv.abm6063 Endoplasmic reticulum chaperone genes encode effectors of long-term memory.

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The survival of honey bee colonies worldwide is threatened by the ectoparasite Varroa destructor. In this riveting episode, we host Dr. Thomas A. O’Shea-Wheller, who has dedicated his research to uncovering solutions to this pressing issue.O'Shea-Wheller presents an in-depth study of a Varroa-resistant honey bee stock, known as 'Pol-line', and its potential in tackling this parasite threat. The study, conducted on a large scale and over an extended period, showed promising results. The 'Pol-line' demonstrated significantly reduced Varroa levels, lower titres of three major viruses vectored by the mite (DWV-A, DWV-B, and CBPV), and a notable increase in survival.Interestingly, a fourth virus not associated with Varroa—BQCV—showed no differences between the stocks, hinting at the disruption of the transmission pathway. When Varroa levels were removed from the equation, viral titres did not significantly predict colony mortality risk, shedding new light on Varroa's etiology.Join us as we delve into these promising findings and discuss the potential of derived stocks as a sustainable solution to the Varroa pandemic.Keywords: Varroa destructor, honey bee, Apis mellifera, Varroa-resistant, Pol-line, DWV-A, DWV-B, CBPV, BQCV, Dr. Thomas A. O’Shea-Wheller.https://doi.org/10.1038/s41598-022-08643-w The ectoparasite Varroa destructor is the greatest threat to managed honey bee (Apis mellifera) colonies globally.

In this captivating episode, we host Dr. McGuire, whose groundbreaking work in radio astronomy offers new insights into the presence and identification of polycyclic aromatic hydrocarbons (PAHs) in space. PAHs are abundant in many astronomical objects as shown by mid-infrared spectroscopy, but the challenge of determining specific PAH molecules has been a longstanding issue in the field.Dr. McGuire and his team employed a novel approach to tackle this problem by using a stacking and matched filter analysis to scrutinize radio observations of TMC-1, a region within the interstellar Taurus Molecular Cloud. Their rigorous analysis led to the detection of emissions from two isomers of the small PAH cyanonapthalene, a compound comprising two fused benzene rings with a CN group attached.This remarkable finding opens up exciting possibilities for understanding the interstellar medium and the formation of PAHs. In this conversation, we delve deeper into the potential in situ gas-phase PAH formation pathways from smaller organic precursor molecules.Tune in to learn more about the fascinating cosmic chemistry and the potential implications of these discoveries for our understanding of the universe.Keywords: Polycyclic aromatic hydrocarbons, PAHs, radio astronomy, TMC-1, Taurus Molecular Cloud, cyanonapthalene, interstellar medium, Dr. McGuire.https://doi.org/10.1126/science.abb7535

In this episode, we are thrilled to have Dr. Morrisey join us as he sheds light on his groundbreaking research into the human lung's unique structure and its implications on diseases like chronic obstructive pulmonary disease (COPD).The human lung's architecture is markedly different from that of mice, particularly in its distal airway configuration and its interplay with the alveolar gas-exchange niche, resulting in a unique anatomical structure known as the respiratory bronchioles. This uniqueness has largely left the cellular and molecular mechanisms governing respiratory bronchioles unexplored, owing to the lack of a counterpart in mice. Dr. Morrisey and his team discovered a unique secretory cell population within the human respiratory bronchioles, distinct from those found in larger proximal airways. Through organoid modeling, they found that these Respiratory Airway Secretory (RAS) cells act as progenitors for Alveolar Type 2 cells, vital for maintaining and regenerating the alveolar niche. RAS cell differentiation into Alveolar Type 2 cells is influenced by Notch and Wnt signaling.Importantly, the team noted that RAS cells transcriptionally change in cases of COPD, leading to abnormal Alveolar Type 2 cell states associated with smoking exposure in both humans and ferrets.Join us as Dr. Morrisey elaborates on the implications of these findings, the role of the newly discovered RAS cells, and how this knowledge could transform our understanding and treatment of chronic lung diseases.Keywords: Human lung, distal airway, alveolar gas-exchange niche, respiratory bronchioles, RAS cells, Alveolar Type 2 cells, Notch and Wnt signaling, COPD, organoid modeling, chronic lung disease.https://doi.org/10.1038/s41586-022-04552-0 These data identify a distinct progenitor in a region of the human lung that is critical in maintaining the gas-exchange and altered in chronic lung disease.

In this episode, we are delighted to host the renowned scientist Dr. James Tour, whose recent research offers a groundbreaking solution to two of the most urgent environmental problems we face today – plastic waste and escalating atmospheric carbon dioxide (CO2) levels.Dr. Tour's team has demonstrated that the thermal treatment of plastic waste in the presence of potassium acetate can produce an effective carbon sorbent capable of capturing CO2. Remarkably, this process works with single or mixed streams of polyolefin plastics. The resulting material possesses pores with a width of 0.7–1.4 nm, allowing for significant CO2 capture and easy regeneration upon reaching a temperature of 75 ± 5 °C.This potentially revolutionary method offers a dual solution – it addresses the environmental menace of plastic waste while providing a viable and cost-effective means for CO2 capture. Indeed, the estimated cost of CO2 capture from flue gas using this technology is less than $21 per ton of CO2, making it highly competitive compared to other CO2 capture technologies.Join us as we delve into this fascinating research with Dr. Tour and explore its implications for our global fight against climate change and plastic pollution.Keywords: Plastic waste, atmospheric carbon dioxide, CO2 capture, Dr. James Tour, environmental concerns, carbon sorbent, polyolefin plastics, climate change, plastic pollution.doi: 10.1021/acsnano.2c00955 Here, we show that the thermal treatment of PW in the presence of potassium acetate yields an effective carbon sorbent with pores width of 0.7-1.4 nm for CO2 capture.

In this illuminating episode, we welcome distinguished scientist Dr. O'Neill to discuss their critical research on repetitive elements in the human genome, their influence on our genetic variation and health, and the technological advancements facilitating this research.Repetitive elements like transposable elements (TEs), repeat expansions, and repeat-mediated structural rearrangements significantly shape chromosome structure, species evolution, and human health, contributing to our genetic variation. Despite their pivotal role, technological limitations during the human genome reference GRCh38 development have left these repetitive regions unexplored.Dr. O'Neill and team utilized long-read sequencing to support the complete assembly of the pseudo-haploid human cell line CHM13, providing an opportunity for a genome-scale assessment of all human repetitive sequences and their epigenetic and transcriptional profiles. This comprehensive investigation reveals repeat divergence, evolution, and expansions or contractions with impressive resolution.This study identified 43 previously unknown repeats and repeat variants, characterized 19 complex, composite repetitive structures, and developed an updated catalog of human repetitive sequences. Through precision nuclear run-on sequencing and assessment of CpG methylated sites, the team unveiled intriguing correlations between nascent transcription, sequence divergence, CpG density, and methylation.The results demonstrate the dynamic relationship between transcriptionally active retroelement subclasses and DNA methylation and hint at potential mechanisms for the evolution of new repeat families and composite elements. The research also highlights the impact of repeats on the structural diversity of the genome and the likely existence of high levels of repeat variation across the human population.Join us as Dr. O'Neill dives deeper into the role of repeats in our genome and shares insights into how this knowledge could revolutionize our understanding of human genetics and health.Keywords: Human genome, repetitive elements, transposable elements, repeat expansions, long-read sequencing, CHM13, epigenetics, transcriptional profiles, repeat divergence, CpG methylation, DNA methylation, genomic innovations.https://doi.org/10.1126/science.abk3112

Join us for this summary episode, where we dive into the highlights from our recent guest speaker series. Each week, we hosted exceptional thought leaders and researchers from diverse fields, who shared their pioneering research, intriguing discoveries, and insightful perspectives.Our lineup featured some of the greatest minds in fields spanning from neuroscience and genomics to environmental science and artificial intelligence. These discussions touched on everything from the intricacies of brain development and the mysteries of the human genome to groundbreaking solutions for environmental challenges and innovative advancements in AI technology.In this episode, we'll revisit the key takeaways from each speaker, reflect on the questions posed by our audience, and look at how these discussions contribute to our understanding of these complex topics. We will also provide a sneak peek into our upcoming lineup of guest speakers.This is a fantastic opportunity to catch up on any discussions you may have missed, refresh your memory on those you attended, and gain an overview of the diverse topics we've explored so far in our series. Don't miss out on this comprehensive review of our enriching conversations with these trailblazing guests!Keywords: guest speaker series, neuroscience, genomics, environmental science, artificial intelligence, recap, summary, research, discovery, advancements.

In this enlightening episode, we welcome Dr. Cheng, a leading researcher in the field of machine learning (ML). We explore the innovative approach of ML in representing molecular-orbital-based (MOB) features for predicting post-Hartree–Fock correlation energies. Though previous applications of MOB-ML using Gaussian Process Regression (GPR) have shown promise, Dr. Cheng addresses the limitations of this method, particularly its computational constraints, when dealing with large datasets.Dr. Cheng introduces us to an advanced approach, employing a clustering/regression/classification model of MOB-ML. He elaborates on the three-step process: partitioning the training data using regression clustering (RC), independently regressing each cluster using either linear regression (LR) or GPR, and training a random forest classifier (RFC) for predicting cluster assignments based on MOB feature values. Dr. Cheng's explanation underscores how this method dramatically reduces computational time while maintaining prediction accuracy.This episode offers fascinating insights into how this pioneering approach can reach chemical accuracy with limited training data, demonstrating significant speed increases compared to traditional MOB-ML techniques. Moreover, we learn how the developed models can predict large-molecule energies accurately, even when trained only on small-molecule data. Join us as we delve into this captivating topic, shedding light on the intersection of chemistry and ML and the transformative potential these methodologies hold for the future of scientific computation.Keywords: Machine Learning, ML, Molecular-Orbital-Based Features, MOB-ML, Gaussian Process Regression, GPR, Regression Clustering, RC, Linear Regression, LR, Random Forest Classifier, RFC, Computational Chemistry, Post-Hartree–Fock Correlation Energies.https://pubs.acs.org/doi/abs/10.1021/acs.jctc.9b00884

In a fascinating conversation with Dr. Guo, we delve into the world of canine emotion perception and their ability to understand both human and dog emotions. Domestic dogs, unlike many other species, have uniquely evolved to recognize and interpret the emotions of not only their own species but also those of humans, their closest companions.In this episode, Dr. Guo illuminates his research by employing a cross-modal preferential-looking paradigm to study dogs' reactions to different emotional expressions. Dogs were presented with either human or dog faces displaying varying emotional states—ranging from happiness and playfulness to anger and aggression. These visual cues were paired with vocalizations that either matched the emotion displayed or contradicted it, or with neutral Brownian noise. Dr. Guo shares the intriguing finding that dogs spent significantly longer periods looking at the face that matched the emotional tone of the vocalization. This behavior was observed not only with other dogs but also with human emotions, indicating a level of emotional comprehension previously believed to be exclusive to humans.This conversation provides insights into the incredible cognitive abilities of dogs, and how they can extract, integrate, and differentiate between positive and negative emotions from both humans and dogs. Tune in for an eye-opening discussion about the emotional intelligence of our canine companions.Keywords: Canine emotion perception, cross-modal preferential looking paradigm, emotional valence, cognitive representation, bimodal sensory, emotional information, human emotions, dog emotions, animal behavior, animal cognition.https://doi.org/10.1098/rsbl.2015.0883 Dogs can extract and integrate bimodal sensory emotional information and discriminate between positive and negative emotions from both humans and dogs.

In this fascinating episode, we welcome Dr. Ulijn, a pioneering researcher in the field of peptide sequence buildup and molecular adaptation. He delves into his groundbreaking study that illuminates the behavior of living systems and their distinctive ability to distribute stress among a vast number of covalent and noncovalent interactions in mixtures of molecules.Dr. Ulijn takes us on a journey into the world of biomolecular complexity, starting from the basics. He discusses how the selection of a chemical interaction space of mixtures of 5 or 15 dipeptides, through reversible enzymatic sequence exchange, can produce 25 or 225 dynamically interacting tetrapeptides. This setup allows his team to study complex systems that are usually challenging to investigate due to their inherent complexity.Dr. Ulijn describes the complex process through which the abundance of tetrapeptide sequences can be analyzed, leading to patterns that are surprisingly interpretable. These patterns reveal that a system with this level of complexity is capable of responding stochastically, self-organizing, and driving sequence selective oligomerization in response to changes in external conditions. Moreover, he explains how the system exhibits robustness, demonstrating its ability to distribute the impact of a change of conditions across a multitude of interactions. The episode culminates in a fascinating discussion of the implications of this research on our understanding of living systems. If you're interested in peptide sequences, molecular complexity, and the adaptive capabilities of living systems, this conversation with Dr. Ulijn will captivate you.Keywords: Peptide Sequence Buildup, Enzymatic Exchange, Dipeptides, Tetrapeptides, Biomolecular Complexity, Molecular Adaptation, Robustness, Stochastic Processes.https://doi.org/10.1016/j.chempr.2022.03.016 Enzymatic exchange of mixes of dipeptides leads to the buildup of tetrapeptides that can be tracked. Self-organization drives selective peptide sequence buildup

In this intriguing episode, we welcome Dr. Gäbelein, a scientist at the forefront of cell biology, as he introduces us to a revolutionary approach for manipulating organelle structures within single live cells. This technique, based on FluidFM, involves atomic force microscopy, optical microscopy, and nanofluidics to achieve precision in force and volume control and provides real-time examination capabilities.Dr. Gäbelein walks us through the process of developing this innovative technology, highlighting the role of specially designed probes that facilitate minimal invasive entry into cells. He further elaborates on how optimizing fluid flow allows for the extraction of specific organelles.Dr. Gäbelein shares fascinating findings from his study, particularly the transformation of mitochondria into a pearls-on-a-string phenotype when single or a specific number of mitochondria are extracted. He also explains how this process is calcium independent, leading to isolated, intact mitochondria.Dr. Gäbelein sheds light on the successful transplantation of mitochondria into host cells, and how these fuse into the host cells' mitochondrial network. He shares intriguing results from a study involving the transplantation of healthy and drug-impaired mitochondria into primary keratinocytes and the monitoring of mitochondrial subpopulation rescue.In conclusion, Dr. Gäbelein underscores the immense potential this approach holds for the study of organelle physiology and homeostasis, mechanobiology, synthetic biology, and therapeutic applications. This episode is a must-listen for anyone interested in cell biology and the future of biomedical research.Keywords: Organelle Transplantation, Mitochondria, FluidFM, Atomic Force Microscopy, Nanofluidics, Cell Biology, Mechanobiology, Synthetic Biology.doi:10.1371/journal.pbio.3001576

In this episode, we're thrilled to host Dr. Boolani, who delves into the intriguing scientific connections between our moods and our gut microbiome. The discussion kicks off with an exploration into how traits like energy and fatigue could be unique unipolar moods with their own mental and physical components. This sets the stage for a revealing exploration of Dr. Boolani's recent study that sought to uncover the correlations between these moods and the gut microbiome.Twenty physically active, non-obese subjects participated in the study, and the results were astonishing. The analysis revealed how different bacterial communities, primarily Bacteroidetes and Firmicutes, correlated with the energy and fatigue traits. The bacterium Anaerostipes, for instance, was found to positively correlate with mental energy and negatively with both mental and physical fatigue.Moreover, Dr. Boolani discusses the role of diet, particularly processed meat, and its significant correlation with the four moods. One particular genus from the Firmicutes family, Holdemania, was found to be correlated with the intake of processed meat.Although distinct metabolic profiles were observed, no significant correlation was found between them and the energy and fatigue traits. These exploratory findings suggest that our energy and fatigue traits could be defined by distinct bacterial communities in our gut, independent of our diet.Join us as Dr. Boolani enlightens us on these groundbreaking findings and what they could mean for our understanding of energy, fatigue, and the fascinating world of the gut microbiome. He also emphasizes the need for more comprehensive studies to affirm these insights and their potential implications for health and wellbeing. This is an episode you won't want to miss!https://dx.doi.org/10.3390%2Fnu14030466 Trait Energy and Fatigue May Be Connected to Gut Bacteria among Young Physically Active Adults: An Exploratory Study

Join us in this enlightening episode with Dr. Bolton, who explores the fascinating relationships between early-life adversity (ELA), the maturation of stress-related brain circuits, and subsequent mental health vulnerabilities. Her recent study delves into the profound ways ELA influences brain development, specifically impacting the hypothalamic corticotropin-releasing hormone (CRH) neurons.Dr. Bolton reveals that ELA increases functional excitatory synapses onto these stress-sensitive neurons, disrupting the typical developmental synapse pruning process performed by adjacent microglia. The disrupted activity of these microglia is connected to diminished signaling of the microglial phagocytic receptor MerTK in mice exposed to ELA.This intricate neural dance doesn't stop there. Dr. Bolton delves deeper, sharing how selective chronic chemogenetic activation of ELA microglia can help increase microglial process dynamics and reduce excitatory synapse density to control levels. Notably, such selective activation during early life can normalize adult acute and chronic stress responses, hormonal stress-induced secretion, and even behavioral threat responses.As we navigate through this complex world of early-life stress and its long-term impact on stress regulation and mental health, Dr. Bolton's insights shed valuable light. The episode underscores the critical role of microglial actions during development and how they shape our stress-response system, adding a fresh perspective to the discussion of mental illnesses arising from early-life stress.Intrigued about the power of early-life events on your brain and mental health? Tune into this episode and uncover the fascinating mechanisms of stress regulation with Dr. Bolton!https://doi.org/10.1016/j.celrep.2022.110600

In this insightful episode, we're delighted to welcome Dr. Felici, an innovator pushing the boundaries of sustainable energy production through nuclear fusion. Dr. Felici introduces us to the complex world of magnetic confinement in tokamak configurations, highlighting the promise and challenges this path toward sustainable energy presents.One of the core challenges in this field is shaping and maintaining high-temperature plasma within the tokamak vessel. Dr. Felici discusses the necessity of high-dimensional, high-frequency, closed-loop control using magnetic actuator coils and the complications posed by diverse requirements across a wide range of plasma configurations.Delving into his groundbreaking work, Dr. Felici introduces an autonomous learning architecture for tokamak magnetic controller design. This approach elegantly meets control objectives specified at a high level while satisfying physical and operational constraints, offering unparalleled flexibility and generality in problem specification. What's even more exciting is how this approach dramatically reduces the design effort required to produce new plasma configurations.Dr. Felici takes us on a journey of how this new approach was applied to produce and control a diverse set of plasma configurations on the Tokamak à Configuration Variable (TCV). The approach enabled the creation of advanced configurations, including elongated, conventional shapes, as well as negative triangularity and 'snowflake' configurations. The episode also delves into how the team demonstrated sustained 'droplets' on TCV, where two separate plasmas are maintained simultaneously within the vessel.By showcasing the potential of reinforcement learning in accelerating research in the fusion domain, this conversation with Dr. Felici sheds light on the most challenging real-world systems where reinforcement learning has been successfully applied. If you're interested in sustainable energy, advanced learning systems, or the intersection of the two, this is an episode you won't want to miss!https://doi.org/10.1038/s41586-021-04301-9

Join us for this summary episode, where we dive into the highlights from our recent guest speaker series. Each week, we hosted exceptional thought leaders and researchers from diverse fields, who shared their pioneering research, intriguing discoveries, and insightful perspectives.Our lineup featured some of the greatest minds in fields spanning from neuroscience and genomics to environmental science and artificial intelligence. These discussions touched on everything from the intricacies of brain development and the mysteries of the human genome to groundbreaking solutions for environmental challenges and innovative advancements in AI technology.In this episode, we'll revisit the key takeaways from each speaker, reflect on the questions posed by our audience, and look at how these discussions contribute to our understanding of these complex topics. We will also provide a sneak peek into our upcoming lineup of guest speakers.This is a fantastic opportunity to catch up on any discussions you may have missed, refresh your memory on those you attended, and gain an overview of the diverse topics we've explored so far in our series. Don't miss out on this comprehensive review of our enriching conversations with these trailblazing guests!Keywords: guest speaker series, neuroscience, genomics, environmental science, artificial intelligence, recap, summary, research, discovery, advancements.

In this episode, we are joined by Dr. Soshany, a researcher delving into the realm of time travel and its potential paradoxes. If time travel were possible, it would seemingly lead to perplexing paradoxes, including the famous grandfather paradox and bootstrap paradoxes where creation appears to come from nothing. Dr. Soshany introduces us to his groundbreaking mathematical model for a spacetime with a time machine. He explains two intriguing multiple-histories models, which propose solutions to time travel paradoxes by allowing for multiple timelines or histories. Any changes to the past, under these models, would occur in a new history, separate from the one from which the time traveler originated.In this enlightening discussion, Dr. Soshany constructs novel and concrete examples of multiple-histories resolutions to time travel paradoxes. He delves into intriguing questions such as the possibility of returning to a previously visited history and whether a finite or infinite number of histories would be necessary.Surprisingly, under certain conditions, Dr. Soshany reveals that these histories could be finite and cyclic, thereby extending the Novikov self-consistency conjecture to multiple histories and demonstrating hybrid behavior combining the two.Towards the end of the episode, Dr. Soshany discusses how observers might experimentally differentiate between multiple histories and the Hawking and Novikov conjectures. Tune in for a riveting journey into the world of theoretical physics and time travel.Keywords: Time Travel, Paradoxes, Multiple Histories, Spacetime, Grandfather Paradox, Bootstrap Paradoxes, Novikov Self-Consistency Conjecture, Theoretical Physics.https://doi.org/10.48550/arXiv.1907.04178 Lectures on Faster-than-Light Travel and Time Travel

In this compelling episode, we sit down with Dr. Singh to discuss the future of sustainable energy via an artificial photosynthetic (AP) system. Dr. Singh guides us through the fascinating concept of artificial photosynthesis, highlighting the challenges and opportunities of capturing CO2 directly from dilute sources such as flue gas and air to produce fuels and chemicals.Delving into the core of his research, Dr. Singh introduces us to the design and evaluation of an integrated AP system that harnesses sunlight to convert captured CO2 into fuels. His work explores the solar-to-fuel (STF) efficiency of such a system, revealing promising thermodynamic limits ranging from 34% to 40% for a variety of products.The conversation deepens as Dr. Singh describes two different integration schemes—integrated cascade systems and fully integrated systems. We learn how fully integrated systems can be significantly more efficient, as they bypass the need for additional energy for compression, separation, and recycling of CO2. These insights shed light on the synthesis of higher-electron products, their role in maintaining the robust operation of an integrated AP system, and their compatibility with different carbon capture processes.Lastly, Dr. Singh proposes a design for a fully integrated AP system that uses a moisture gradient across an anion-exchange membrane to capture CO2 from the air, convert it directly to fuels using water and sunlight, and simultaneously reduce the CO2 level of the surrounding air.This episode with Dr. Singh is a must-listen for anyone interested in sustainable energy solutions. His research offers an intriguing glimpse into the future where artificial photosynthesis systems could potentially outperform natural leaves by 14 times in efficiency, representing a quantum leap forward in our quest for sustainability.https://doi.org/10.1021/acssuschemeng.8b04969 Assessment of Artificial Photosynthetic Systems for Integrated Carbon Capture and Conversion

In this episode, we're privileged to host Dr. Finger, a leading figure in the field of pancreatic islet transplantation. We explore the intricacies of this potentially life-altering treatment for diabetes, which, while promising, faces significant hurdles related to the supply chain and quality control of donor islets.Dr. Finger takes us through the transformative potential of cryopreservation to solve these challenges. The key, he explains, lies in the meticulous optimization of cryoprotectant agent composition, loading and unloading conditions, and methods for vitrification and rewarming. This strategy can successfully preserve islets from a variety of sources, including mice, pigs, humans, and even human stem cell-derived beta cells.Our discussion reveals that these post-cryopreservation islets maintain high viability, not only immediately after rewarming but also after extended cryogenic storage of up to 9 months. Dr. Finger outlines how these islets retain normal macroscopic, microscopic, and ultrastructural morphology and largely maintain cellular respiration and glucose-stimulated insulin secretion functionality.The conversation takes an exciting turn as we explore the practical application of these findings. Dr. Finger shares insights into how cryopreserved islets behave in vivo, with examples from porcine and stem cell-derived beta cell xenotransplant models, as well as a mouse syngeneic transplant model. In these models, cryopreserved islets produced insulin and, impressively, restored normal blood sugar levels within 24-48 hours in a high percentage of cases.Finally, we discuss the scalability of this approach and its implications for improving the transplantation outcomes for diabetes patients. Dr. Finger's research paints a bright future for the practicality of islet transplantation, offering hope to countless individuals living with diabetes. If you're curious about cutting-edge diabetes research and the transformative potential of cryopreservation, this episode with Dr. Finger is a must-listen.https://doi.org/10.1038/s41591-022-01718-1 Pancreatic islet cryopreservation by vitrification achieves high viability, function, recovery, and clinical scalability for trans plantation

In this fascinating episode, we sit down with Dr. Spontak, an expert in polymeric membranes, to discuss the latest breakthroughs in carbon dioxide capture technology. As global climate change continues to dominate scientific and public discourse, the need for effective, low-cost, and scalable carbon capture solutions has never been greater.Dr. Spontak introduces us to a groundbreaking hybrid-integrated membrane strategy that could change the face of carbon capture. His team's innovative design overcomes the long-standing tradeoff between permeability - the speed at which gases flow through the membrane - and selectivity - the ability to separate one gas from another.The layered design incorporates a base layer of porous polyacrylonitrile for structural support, and a middle layer of either elastomer-like polydimethylsiloxane or glassy-type polytetrafluoroethylene. The key to their approach, however, is the patchy layer of polyamine they graft onto these substrates. This selective layer attracts carbon dioxide, pulling it into the membrane and facilitating its separation from nitrogen.Dr. Spontak guides us through the underlying principles of this approach, explaining how the high-solubility mechanism of the polyamine layer, when hydrated by water vapor naturally present in gas streams, enriches the concentration of CO2. This then allows for rapid transport of CO2 through the permeable substrate.We also explore the impressive results achieved by this method - not only does the new membrane design retain much of its high CO2 permeability, but it also achieves a staggering increase in CO2 selectivity. If you're interested in how the fields of materials science and environmental science intersect and the technological advancements propelling us toward a more sustainable future, then you won't want to miss this engaging conversation with Dr. Spontak.New polymer membrane tech improves efficiency of CO2 capture http://dx.doi.org/10.1126/science.abj9351

Join us for the weekly recap! Did you miss our guest speaker talks? Do you still have unanswered questions? During the weekly recap we will summarize the guest speaker rooms we had the previous week.

In this insightful episode, we are joined by Dr. Sarwat from IBM Research, who introduces us to the groundbreaking realm of phase-change memtransistive synapses for neuromorphic computing. This new field is inspired by the biological nervous system's ability to adapt and learn, bringing transformative potential to the world of computing.Neuromorphic computing aims to recreate the functionalities of the mammalian nervous system, where multiple synaptic plasticity rules operate over wide-ranging timescales to enable learning and memory formation. Dr. Sarwat explains the challenges of achieving this in artificial synapses and how conventional methods fall short in emulating these dynamic functionalities.We delve into the workings of phase-change memtransistive synapses, a novel solution that leverages the non-volatility of phase configurations and the volatility of field-effect modulation for implementing tunable plasticities. These unique synapses can enable intricate plasticity rules such as short-term spike-timing-dependent plasticity, enhancing our ability to model dynamic environments.Dr. Sarwat further discusses how these memtransistive synapses are efficiently used in realizing accelerators for Hopfield neural networks, addressing combinatorial optimization problems. This fascinating conversation explores the frontier of neuromorphic computing and highlights the potential these advancements hold for the future of computing. Whether you're a computer science enthusiast or someone interested in how nature inspires technology, this episode promises to expand your understanding of cutting-edge research in neuromorphic computing.Keywords: Neuromorphic Computing, Artificial Synapses, Synaptic Plasticity, Long-term Plasticity, Short-term Plasticity, Phase-Change Memtransistive Synapses, Spike-Timing-Dependent Plasticity, Hopfield Neural Networks, Combinatorial Optimization, Dynamic Environments.https://doi.org/10.1038/s41565-022-01095-3

In this enlightening episode, we are joined by Dr. Arlehamn as we delve into the complex world of Parkinson's Disease (PD), a multi-stage neurodegenerative disorder with largely unknown causes. Recently, T cells have been identified to play a significant role in the autoimmune features associated with PD.Dr. Arlehamn takes us through his team's cutting-edge research that involves RNA sequencing on PBMC and peripheral CD4 and CD8 memory T cell subsets derived from PD patients and age-matched healthy controls. When these groups were stratified by their T cell responsiveness to alpha-synuclein (α-syn), the study revealed a broad differential gene expression profile in memory T cell subsets and a specific PD associated gene signature.Notably, this investigation led to the identification of significant enrichment of transcriptomic signatures previously associated with PD, including those for oxidative stress, phosphorylation, autophagy of mitochondria, cholesterol metabolism, inflammation, and the chemokine signaling proteins CX3CR1, CCR5, and CCR1. Moreover, the team identified genes in these peripheral cells that have previously been shown to be involved in PD pathogenesis and expressed in neurons, such as LRRK2, LAMP3, and aquaporin.Together, these findings suggest that characteristics of circulating T cells with α-syn-specific responses in PD patients provide valuable insights into the interactive processes occurring during PD pathogenesis. This episode is a deep dive into the advanced research around PD, its autoimmune aspects, and the potential targets for intervention. Whether you're a neurology enthusiast or someone interested in understanding the mechanisms behind neurodegenerative diseases, this episode promises to be a highly informative and intriguing conversation.Keywords: Parkinson's Disease (PD), Neurodegenerative disorder, Autoimmune features, T cells, RNA sequencing, PBMC, CD4, CD8, Memory T cell subsets, Alpha-synuclein (α-syn), Inflammatory autoimmune response, PD associated gene signature, Oxidative stress, Phosphorylation, Autophagy of mitochondria, Cholesterol metabolism, Inflammation, Chemokine signaling, CX3CR1, CCR5, CCR1, LRRK2, LAMP3, Aquaporin.https://doi.org/10.1038/s41531-022-00282-2

In this thought-provoking episode, Dr. Ghimire joins us to discuss his research on topological nanospasers, an emerging field of study with vast potential for applications in diverse areas including infrared spectroscopy, sensing, probing, and biomedical treatment.A topological nanospaser, as Dr. Ghimire explains, is a system consisting of a silver nanospheroid and a MoS2 monolayer flake with a circular shape. The metal nanospheroid functions as a plasmonic nanoresonator, supporting two rotating modes, which are coupled to the corresponding valleys of MoS2. When external circularly polarized light is applied, it selectively pumps only one of the valleys of MoS2, and this interaction underpins the generation of the spaser dynamics.Dr. Ghimire elaborates on how the generated spaser dynamics are strongly influenced by the size (radius) of the MoS2 nanoflake. For a small radius, the system has a single spasing regime where only the chirally matched plasmon mode is generated. However, as the size of the MoS2 increases, there can be two distinct regimes depending on the pump intensity. In one regime, only the chirally matched plasmon mode is generated, while in the other, both chirally matched and chirally mismatched modes can exist. Fascinatingly, these different spaser operation regimes have opposite handedness in the far-field radiated spaser system.This episode provides a deep dive into the exciting world of topological nanospasers. Whether you're a physicist, a researcher, a student or simply interested in the latest breakthroughs in nanotechnology, this conversation with Dr. Ghimire is sure to captivate you.Keywords: Topological nanospaser, Silver nanospheroid, MoS2 monolayer flake, Plasmonic nanoresonator, Rotating modes, Valleys, External circularly polarized light, Spaser dynamics, Chirally matched plasmon mode, Chirally mismatched mode, Infrared spectroscopy, Sensing, Probing, Biomedical treatment.https://doi.org/10.1021/acsphotonics.0c01919

In this episode, we're honored to host Dr. Persson, who explores one of the most intriguing challenges in quantum physics - explaining the emergence of the classical spacetime geometry from a more fundamental, microscopic perspective.Dr. Persson guides us through the intricacies of the gauge/gravity-correspondence, a holographic framework that associates a supergravity theory in five-dimensional Anti-deSitter space with a strongly coupled superconformal gauge theory on its 4-dimensional flat Minkowski boundary. In this context, the classical geometry should manifest from a specific quantum state of the dual gauge theory.Supporting this principle, Dr. Persson presents compelling research, demonstrating how the classical metric emerges from a canonical state in the dual gauge theory. In this remarkable journey, we gain insights into the Sasaki-Einstein metric, which forms the foundation of supergravity geometry. This metric is represented through an explicit integral formula that involves the canonical quantum state in question.Venturing further, Dr. Persson discusses toric quiver gauge theories, and illustrates how, in these particular cases, our results can be computationally simplified through a process known as 'tropicalization'.Join us in this captivating conversation with Dr. Persson to explore the intersection of quantum physics and classical geometry, revealing how our understanding of the universe is being reshaped by these groundbreaking concepts. Whether you are a quantum physics enthusiast or a curious mind seeking to understand the mysteries of our universe, this episode is a must-listen.Keywords: Quantum theory of gravity, Classical spacetime geometry, Gauge/gravity-correspondence, Supergravity theory, Five-dimensional Anti-deSitter space, Superconformal gauge theory, 4-dimensional flat Minkowski boundary, Quantum state, Sasaki-Einstein metric, Toric quiver gauge theories, Tropicalization.https://doi.org/10.1038/s41467-021-27951-9

Join us in this engaging episode with Dr. Singh, who introduces us to an exciting application of machine learning in the realm of material science. He elucidates how chemical alloying can impact the formation enthalpy of rare-earth intermetallics.The use of machine learning in rare-earth intermetallic design has been minimal, largely due to the limited availability of reliable datasets. To overcome this, Dr. Singh and his team have developed an extensive 'in-house' rare-earth database, containing over 600 compounds. Each entry in this database is enriched with formation enthalpy data and associated atomic features obtained using high-throughput density-functional theory (DFT).With this resource at their disposal, Dr. Singh's team then applied the SISSO (Sure Independence Screening and Sparsifying Operator) based machine learning method to train and test the formation enthalpies of these rare-earth compounds. This approach enabled them to delve into the effects of transition metal alloying on the energy stability of Ce based cubic Laves phases (MgCu type).The SISSO predictions, which align well with high-fidelity DFT calculations and X-ray powder diffraction measurements, provide invaluable quantitative guidance for compositional considerations within a machine-learning model. This contributes significantly to the discovery of new metastable materials.To deepen our understanding, Dr. Singh also analyzes the electronic-structure of a Ce-Fe-Cu based compound, offering insights into the electronic origin of phase stability. This fusion of interpretable analytical models, density-functional theory, and experimental methods presents a quick and reliable design guide for discovering technologically useful materials.Whether you're a materials scientist, a machine learning enthusiast, or just someone fascinated by the intersection of technology and science, this episode with Dr. Singh is a must-listen!Keywords: Machine learning, Rare-earth intermetallics, Chemical alloying, Formation enthalpy, High-throughput density-functional theory (DFT), SISSO, Energy stability, Cubic Laves phases, Metastable materials, Electronic-structure, Phase stability, Material discovery.https://doi.org/10.1016/j.actamat.2022.117759

Did you miss our rooms this week? Would like to have a short summary of our weekly guest speaker talks? Do you still have a question about a topic we discussed? Join us for the weekly recap!

In this intriguing episode, we chat with Dr. Krasnokutski about the fascinating subject of organic molecules present in the dense interstellar medium. Dr. Krasnokutski sheds light on how these complex molecules come into being under typical space conditions and their potential implications for understanding the origins of life.Scientists have managed to synthesize many of these molecules in laboratory conditions mimicking interstellar environments. Still, up until now, only relatively small molecules of biological interest have been shown to form. Dr. Krasnokutski and his team push the boundaries of this understanding, demonstrating the formation of isomeric polyglycine monomers (aminoketene molecules) from the condensation of carbon atoms on the surface of cold solid particles, much like cosmic dust.In a further groundbreaking revelation, Dr. Krasnokutski explains how these aminoketene molecules, upon encountering each other, polymerize to produce peptides of different lengths. The process, which intriguingly involves three of the most abundant species present in star-forming molecular clouds - CO, C, and NH3, bypasses the typical stage of amino acid formation in protein synthesis.What's more? This unique chemistry can efficiently occur even at low temperatures, without the need for irradiation or the presence of water. Dr. Krasnokutski postulates that the delivery of biopolymers formed by this novel chemistry to rocky planets in the habitable zone might play a crucial role in the origins of life.This episode offers a deep-dive into a truly groundbreaking study at the intersection of chemistry, astrophysics, and astrobiology. Whether you are a student of these fields or simply a space enthusiast curious about the mysteries of the universe, this conversation with Dr. Krasnokutski will certainly pique your curiosity.Keywords: Organic molecules, Interstellar medium, Aminoketene molecules, Polyglycine monomers, Peptides, CO, C, NH3, Protein synthesis, Low temperatures, Biopolymers, Origins of life.https://doi.org/10.1038/s41550-021-01577-9

In this thought-provoking episode, we delve into the intriguing realms of perception and causality with Dr. Bechlivanidis. The intuitive assumption that perception of temporal order requires no inference is challenged in this conversation, opening up fascinating discussions around how we interpret and interact with the world around us.Our perception is fundamentally tasked with inferring the most plausible source of sensory stimulation. But what if our assumptions about the order of sensory signals arriving aren't always as straightforward as we believe? Dr. Bechlivanidis introduces us to a novel perceptual illusion that questions this intuitive belief.In a series of three experiments with over 600 participants, Dr. Bechlivanidis and his team found that causality shapes experienced event timings in real-time. Adult participants viewed a simple three-item sequence, ACB, which is typically remembered as ABC due to principles of causality. But when asked to indicate the exact time of events B and C, a remarkable shift occurred in participants' points of subjective simultaneity. The perceived cause, B, appeared earlier, and the assumed effect, C, occurred later, despite participants paying full attention and viewing the sequence repeatedly.This episode challenges conventional understanding, demonstrating the first instance of causality reversing perceived temporal order. This shift in perception cannot be explained by post-perceptual distortion, lapsed attention, or eye movements, adding another layer to our understanding of perception and cognition.Whether you're a psychology student, cognitive scientist, or just a curious mind seeking to understand how our brains process the world, this conversation with Dr. Bechlivanidis is sure to provide a unique perspective and provoke further thought.Keywords: Perception, Temporal order, Sensory stimulation, Perceptual illusion, Event timings, Causality, Subjective simultaneity.https://doi.org/10.1177%2F09567976211032663.

In this enlightening episode, we engage in a deep exploration of the role of long noncoding RNAs (lncRNAs) in learning processes, focusing particularly on fear-related learning, with Dr. Bredy. His breakthrough research has uncovered a substantial population of lncRNAs that respond in adult mice's infralimbic prefrontal cortex to fear-related learning.Dr. Bredy and his team used an advanced technique called RNA Capture-seq to identify these lncRNAs, supplementing these findings with cell-type-specific ATAC-seq applied to neurons selectively activated by fear extinction learning. Through this approach, they discovered 434 inducible lncRNAs that originate from enhancer regions near protein-coding genes.Among these lncRNAs, the team found an experience-induced lncRNA they named ADRAM (activity-dependent lncRNA associated with memory). ADRAM acts as a scaffold and a combinatorial guide, recruiting the brain-enriched chaperone protein 14-3-3 to the promoter of the memory-associated immediate-early gene Nr4a2. Notably, ADRAM is essential for the formation of fear extinction memory.This conversation with Dr. Bredy provides a wealth of information about the involvement of lncRNA activity in the brain, and the key role that enhancer-derived RNAs (eRNAs) play in the epigenomic regulation of gene expression related to the formation of fear extinction memory. Whether you're a neuroscientist, a geneticist, or anyone interested in the incredible complexity and capabilities of the brain, this episode will offer fresh insights and food for thought.https://doi.org/10.1016/j.celrep.2022.110546

In this riveting episode, we discuss the cutting-edge technology of quantum batteries with Dr. Gyhm and his research team. Quantum batteries are sophisticated devices made from quantum states that store and release energy with impressive speed and efficiency. Their promise of significantly increased charging speed compared to classical batteries due to entangling charging operations, positions them as potentially revolutionary for future technological applications.Dr. Gyhm's team reveals the maximal speedup achievable in quantum batteries, which is extensive in the number of cells. This insight indicates a potential quadratic scaling in the charging power compared to the linear scaling achievable with classical methods. To achieve this level of scaling, a global charging protocol, which charges all cells collectively, is required.This conversation brings closure to the quest for understanding the limits of the quantum batteries' charging power, adding to the growing body of work where quantum methods demonstrate quadratic scaling over their classical counterparts. Whether you're a quantum physicist, an electrical engineer, or a technology enthusiast keen on understanding the forefront of energy storage research, this episode is packed with intriguing insights.Keywords: Quantum batteries, Quantum states, Energy storage, Entangling charging operations, Global charging protocol, Quadratic scalinghttps://doi.org/10.1103/PhysRevLett.128.140501

In this episode, Dr. Lizebona discusses a fascinating development in the field of stem cell research: the targeted differentiation of stem cells through high-frequency mechanostimulation. Contrary to past research that saw little benefit in applying frequencies beyond 1 kHz, Dr. Lizebona's team shows that MHz-order mechanostimulation can successfully trigger the differentiation of human mesenchymal stem cells from various donor sources toward an osteoblast lineage.By using nanoscale amplitude surface reflected bulk waves, they show that even short, early stimuli can induce long-term osteogenic commitment. Remarkably, rapid treatments of high-frequency (10 MHz) mechanostimulation have led to significant upregulation in early osteogenic markers and a sustained increase in late markers.The team proposes this as a potential efficient technology for stem cell differentiation for regenerative medicine strategies due to the miniaturizability, low cost of the devices, and the potential for scaling the platform toward practical bioreactors. Tune in to explore how these new insights might revolutionize stem cell differentiation methods and their practical applications in the field of regenerative medicine.https://doi.org/10.1002/smll.202106823

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Dive into a groundbreaking study from the prestigious Osaka University, where researchers venture into the captivating world of visual perception and mental imagery. How does what we imagine influence what we actually see? Using advanced brain-computer interfaces and unique semantic space, they uncover the intricate dance between attention, imagery, and our neural representations. Plus, discover the promising implications of their research for individuals with paralysis and ALS. Join us as we illuminate the unseen pathways of the mind's eye! Keyword List: Visual Perception, Mental Imagery, Osaka University, Brain-Computer Interfaces (rBCI), Neural Representations, Semantic Space Attention vs. Imagery, Electroencephalograms, Paralysis and ALS, Communication Devices for ALS, Closed-loop Systems, Top-down Neural Modulation https://doi.org/10.1038/s42003-022-03137-x

In this enlightening episode, Dr. Zhenqiu Huang from the Department of Genetics at Albert Einstein College of Medicine delves into the intriguing world of lung cancer risk among smokers. While it's known that the risk is dependent on the dose of smoking, the mystery surrounding whether this increased risk is a result of an uptick in the rate of somatic mutation accumulation in normal lung cells remains. Through extensive research, including single-cell whole-genome sequencing and analysis of both age and smoking status, Dr. Huang and his team have unraveled some of these enigmas. Listen in to understand why most smokers never get lung cancer and discover the intrinsic factors that may attenuate lung cancer risk by reducing mutations.Key Words:Lung cancer, Somatic mutations, Smokers, Non-smokersAlbert Einstein College of Medicine, Single-cell whole-genome sequencing, DNA repair, Detoxification, Tobacco smoke, Mutation accumulation, Bronchial cells, Aging, AKR1C2, PAHs, DNA damageDon't miss this insightful dive into the intricate relationship between smoking, aging, and the potential for developing lung cancer.https://doi.org/10.1038/s41588-022-01035-w

Join Dr. Krzysztof Kutak from the Institute of Nuclear Physics at the Polish Academy of Sciences as we delve into the intricate world of protons and partons. Investigate the proposal by Kharzeev and Levin on maximally entangled proton wave functions in Deep Inelastic Scattering. Unpack the relationships between parton numbers, final state hadron multiplicity, and discover how these intricate elements may not be as they seem at first glance. Kutak's team throws a fresh light on this by considering the sum of gluon and quark distribution functions. Find out how their approach aligns with H1 data and challenges existing frameworks, emphasizing the role of low x dynamics in understanding the proton's entangled state. Don't miss this riveting exploration of the cutting-edge developments in nuclear physics!Keyword List:Deep Inelastic ScatteringEntangled Proton Wave FunctionParton Distribution Functions (PDFs)Gluon and Quark DistributionBalitsky–Fadin–Kuraev–Lipatov EvolutionMaximally Entangled StateH1 DataNNPDF CollaborationNext-to-Next-to-Leading Order (NNLO)Collinear and High Energy FactorizationDr. Krzysztof KutakInstitute of Nuclear Physics, Polish Academy of Sciences.https://doi.org/10.1140/epjc/s10052-022-10056-y

Step into the captivating world of visual neuroscience with Dr. Bruce Hansen, a pioneering figure in neuroimaging techniques. The eyes are said to be the windows to the soul, but how exactly does our brain interpret the endless streams of visual information we encounter daily? Dive deep into the intricacies of how real-world scenes are processed within our minds. While traditional imaging methods like fMRI have offered insights, they often miss the dynamic aspect of the visual code. Enter the innovative DETI (Dynamic Electrode-to-Image) mapping, a technique that harnesses the power of EEG's high temporal resolution to give us a richer, more nuanced understanding of our visual world. Join us as Dr. Hansen unveils how DETI mapping reveals the nonuniform modifications our visual input undergoes and why understanding these transformations is crucial in understanding not just our visual perceptions but also the very fabric of our reality.Keyword List:Visual NeuroscienceDr. Bruce HansenNeuroimagingBOLD SignalfMRIEEGEncoding TechniqueSpatiotemporal SignatureVisual CodeDynamic Electrode-to-Image (DETI) MappingNeural ModificationsReal-world ScenesSpatial FrequenciesFeedforward and Recurrent Processes.https://doi.org/10.1371/journal.pcbi.1009456

Join Dr. Gallardo, a distinguished alumnus of the University of Texas Southwestern Medical School, as he unveils his groundbreaking research from the laboratory of Dr. Thomas C. Südhof. Alzheimer's disease is notorious for its amyloid plaques and tau tangles. But there's more to this devastating disease – the hidden culprits known as reactive astrocytes. Dr. Gallardo explores the potential connection between these astrocytes and the pathophysiology of Alzheimer’s and other tauopathies. Dive deep into his fascinating studies on astrocytic α2-Na+/K+ ATPase (α2-NKA) and its implications in the neurodegenerative process. Uncover how targeting this pump or inhibiting its activity might offer new therapeutic avenues to combat neurodegeneration and brain inflammation. Stay with us for a riveting discussion on the future of Alzheimer's treatment!Keyword List:Alzheimer's DiseaseTauopathiesUniversity of Texas Southwestern Medical SchoolReactive AstrocytesNeuroinflammationα2-Na+/K+ ATPase (α2-NKA)NeurodegenerationBrain InflammationLipocalin-2 (Lcn2)Pharmacological InhibitionGenetic BlockadeAstrogliosishttp://dx.doi.org/10.1126/scitranslmed.abm4107

Dive into the microscopic realm of neural progenitor cells with Dr. Ernst of McGill University as we delve into the intricacies of FOXG1—a gene exclusively expressed in the brain—and its profound implications. From microcephaly to severe intellectual disabilities, the role of FOXG1 is more integral than previously thought. In a groundbreaking study, Dr. Ernst and his team meticulously modeled FOXG1 syndrome using cells from diagnosed patients and controls. The revelations? Cells with a FOXG1 loss demonstrated a marked reduction in proliferation, a skewed cell cycle ratio, and an intriguing increase in primary cilia. But what happens when the FOXG1 gene is manipulated? The engineered loss and subsequent repair of FOXG1 reveal its dose-dependent effects, painting a clear picture of its essential role in human brain cell growth. Whether you're curious about genetic functions in brain health or the potential future therapies for disorders like glioblastoma, this episode with Dr. Ernst promises a deep dive into the genetic heart of our most vital organ.Keyword List:McGill UniversityFOXG1 SyndromeNeural Progenitor CellsMicrocephalySeizuresIntellectual DisabilityGlioblastomaForebrain Cell ProliferationCell CyclePrimary CiliaGenetic EngineeringHuman Brain Cell Growthhttps://doi.org/10.1016/j.stemcr.2022.01.010

Journey with Dr. Levy into the heart of cellular fate determination and the role of the polycomb repressive complex 2 (PRC2) in it. Histone 3 lysine 27 methylation (H3K27me3) marks, crucial for cellular bifurcation during development, have remained a mystery—until now. Dr. Levy introduces the cutting-edge EBdCas9 technology, a fusion of a computationally designed protein and the infamous dCas9, to shed light on this enigmatic process. When targeted at specific genes, this tool reveals precise locations where H3K27me3 and EZH2 operate, leading to fascinating insights such as the discovery of a functional distal TATA box upstream of the TBX18 transcription start site.Dive deeper to understand the power of EBdCas9, from revealing the most significant H3K27me3 marks in promoter regions to controlling transcriptional activation organically. Dr. Levy’s work also paints a larger picture about the nature of H3K27me3 marks on promoter regions, challenging our previous understanding and suggesting that many broad marks might be indiscriminate. With an eye to the future, this episode discusses the potential of EBdCas9 not only as an invaluable research tool but also as a revolutionary method to treat diseases like cancer. This isn't just about decoding genes; it's about rewiring our understanding of epigenomic memory, and how we might shape it for the future of medicine.Keyword List:Epigenomic RegulationPRC2Histone 3 lysine 27 methylation (H3K27me3)EBdCas9 TechnologydCas9TATA BoxTBX18Gene ActivationTranscriptional ActivationTBP RecruitmentEpigenomic MemoryCellular Fate DeterminationCancer Treatment Potentialdoi: 10.1016/j.celrep.2022.110457. PMID: 35235780.

Did you miss our rooms during the week? We will give a short summary of what we discussed with our guest speakers this week. Join us!

Step into the cutting-edge world of embryogenesis with Dr. Alejandro A-Castrejon from the Weizmann Institute of Science. While our grasp on the early stages of mammalian development has steadily grown over the years, the phase after implantation into the maternal uterus has remained somewhat elusive. But all that is about to change.Dr. Alejandro A-Castrejon unveils groundbreaking platforms for the ex utero culture of post-implantation mouse embryos. This transformative approach allows researchers to mimic in utero development precisely from before gastrulation (at embryonic day, or E, 5.5) up until advanced organogenesis stages (E11) – all outside the womb. With a strategic mix of static and rotating bottle culture platforms, these embryos are nurtured in conditions that beautifully recreate their natural growth environment.Dive into the nitty-gritty as we discuss how these cultured embryos, scrutinized via histological, molecular, and single-cell RNA sequencing analyses, mirror in utero development with unparalleled precision. This revolutionary method doesn’t just push the boundaries of what we thought was possible; it obliterates them, enabling researchers to undertake a slew of embryonic interventions and observations over six days, unfettered by the limitations of the uterine environment.Beyond its scientific marvel, the system’s implications are vast and varied. From genetic modifications and chemical screens to tissue manipulation and advanced microscopy techniques, the doors to innovation swing wide open. By underlining the self-organizing prowess of embryos and expanding the realm of ex utero research across various mammalian species, Dr. A-Castrejon offers a tantalizing glimpse into the future of embryogenesis research.Keyword List:Weizmann Institute of ScienceEmbryogenesisEx utero culturePost-implantation mouse embryosGastrulationOrganogenesisRotating bottle cultureHistological analysisSingle-cell RNA sequencingEmbryonic perturbationsArtificial embryogenesisMammalian speciesIn vitro recapitulationhttps://doi.org/10.1038/s41586-021-03416-3

Dr. Van Zundert invites us on an enlightening journey into the intricate world of neurodegenerative diseases, specifically amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). These disorders have puzzled researchers for years, especially given the involvement of non-cell-autonomous mechanisms where toxic factors released by astrocytes lead to motorneuron (MN) damage. The heart of this mystery? A compound known as inorganic polyphosphate (polyP).Delving deep into his research, Dr. Van Zundert unveils a startling discovery. Astrocytes derived from mice and patient-induced pluripotent stem cells (iPSCs) with mutations linked to ALS/FTD (including SOD1, TARDBP, and C9ORF72) exhibit a spike in their intracellular polyP levels. The consequence? Elevated polyP levels in astrocyte-conditioned media (ACM), which, when presented to MNs, has devastating effects.However, hope looms on the horizon. By degrading or neutralizing polyP, Dr. Van Zundert and his team can successfully stave off ACM-induced MN death. To compound this groundbreaking discovery, postmortem analyses of ALS spinal cords revealed amplified polyP staining signals, and an uptick in polyP concentrations was noted in ALS cerebrospinal fluid (CSF).This episode unravels the profound implications of these findings. Not only does excessive astrocyte-derived polyP emerge as a critical element in MN degeneration and a potential game-changer in ALS/FTD treatment, but polyP in CSF could revolutionize early detection, positioning itself as a pioneering biomarker for ALS/FTD.Keyword List:Neurodegenerative diseasesAmyotrophic lateral sclerosis (ALS)Frontotemporal dementia (FTD)Non-cell-autonomous mechanismsAstrocytesMotorneurons (MNs)Inorganic polyphosphate (polyP)Astrocyte-conditioned media (ACM)iPSC-derived astrocytesALS/FTD-linked mutationsBiomarkerCerebrospinal fluid (CSF)Therapeutic targethttps://doi.org/10.1016/j.neuron.2022.02.010

In a riveting conversation with Dr. Bohnert, we uncover the mysteries surrounding the biological process of aging. Contrary to popular belief, aging isn't a chaotic decline but a process governed at the molecular level. The spotlight today is on a unique botanical extract from Artemisia scoparia (SCO), which has been shown to promote fat storage, metabolic resiliency, and notably, extend the life span of the nematode Caenorhabditis elegans by an astonishing 40%.Dr. Bohnert details how SCO's magic lies in its ability to elevate levels of unsaturated fats in worms. Inhibiting certain enzymes, which oversee the biosynthesis of these fatty acids, cancels out SCO's life-extending benefits. Furthermore, SCO influences fat regulation in these worms by inducing nuclear translocation of the transcription factor DAF-16/FOXO in a manner dependent on AMP-activated protein kinase.Interestingly, while enhancing fat accumulation is a shared outcome of SCO in both worms and mammals, the mechanisms may vary across species. In mice, for example, SCO activates a receptor that regulates fat storage, which doesn't exist in C. elegans. This hints at potentially different pathways that are stimulated by SCO in different organisms.The episode also touches on how SCO holds its own when compared to well-known anti-aging therapies like metformin and rapamycin, outperforming them in certain aspects, and showing fewer side effects. As the first study to highlight life-span extension through extract-driven fat accumulation, this discovery is both novel and groundbreaking. It paints a picture where increased unsaturated fats, typically associated with benefits against cardiovascular diseases and type-2 diabetes in humans, can be prohealth and antidisease.For listeners intrigued by the practical application, Dr. Bohnert discusses the possibility of using SCO as a prohealth dietary supplement, especially as it enhances stress resistance and seems to counter age-related disorders even when administered later in life. As SCO treatments unfold, it's evident they engage specific longevity factors, displaying specificity in their mode of action.In conclusion, Dr. Bohnert anticipates an exciting road ahead. With numerous bioactive compounds already identified in SCO, including chlorogenic acid which has shown to have some life-span extending properties, further research can reveal whether SCO and its components might revolutionize our understanding of longevity and healthy aging in mammals.Keyword List:AgingMolecular controlArtemisia scoparia (SCO)Fat storageMetabolic resiliencyCaenorhabditis elegansLife-span extensionUnsaturated fatsTranscription factor DAF-16/FOXOAMP-activated protein kinaseAnti-aging therapiesMetforminRapamycinProhealth dietary supplementStress resistanceChlorogenic acid.https://doi.org/10.1093/gerona/glac040

In a groundbreaking study from Dr. Ying-Hui Fu's team at the University of California, we delve into the intriguing world of Familial Natural Short Sleepers (FNSS). These individuals, who naturally sleep less yet face no cognitive decline, might offer insights into slowing Alzheimer's disease. Join us as we discuss the compelling link between sleep quality and neurodegenerative disorders and how FNSS genetic mutations could become our secret weapon against Alzheimer's.Keyword List:Familial Natural Short Sleepers (FNSS)Alzheimer's disease (AD)Genetic mutationsDEC2-P384RNpsr1-Y206HNeurodegenerationAmyloid plaquesTau pathologySleep efficiencyUniversity of California San Franciscohttps://doi.org/10.1016/j.isci.2022.103964

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Long-distance electrodynamic intermolecular forcesUncover the groundbreaking work of Marco Pettini and his team, who reveal a surprising force at play in the dance of biomolecules. With the use of two pioneering experiments, they bring to light the existence of long-range electrodynamic (ED) forces between molecules—forces that, until now, remained theoretical. These forces could dramatically change our understanding of cellular dynamics, potentially speeding up certain cellular processes and perhaps even playing a role in drug design. Dive deep with us as we explore this thrilling frontier, ponder its implications in evolution, and imagine its potential uses in biomedical innovation.Keyword List:Electrodynamic (ED) forcesBiomolecular interactionsMolecular biologyAix-Marseille Univ.Fluorescence correlation spectroscopyTerahertz spectroscopyResonant forcesMolecular condensatesAdenosine triphosphate (ATP)Biomolecular communicationsOptogeneticsDrug designEvolutionMolecular crowdinghttps://doi.org/10.1126/sciadv.abl5855

In today's episode, Dr. Morein enlightens us about an often under-recognized condition: Hoarding Disorder (HD). Traditionally associated with Obsessive-Compulsive Disorder (OCD), recent insights suggest a surprising connection between HD and Attention Deficit/Hyperactivity Disorder (ADHD).Main Points:Background on Hoarding Disorder (HD):HD remains under-recognized and inadequately treated.Though it generally manifests by early adulthood, most patients only seek help later in life, often leading to research predominantly focusing on older females.HD vs. OCD:Historically, HD was considered a variant of OCD.However, recent studies indicate that many with HD display symptoms reminiscent of ADHD, particularly inattention.Study Findings:Among adults attending an ADHD clinic, a significant proportion (about 20%) exhibited clinically relevant hoarding symptoms, compared to only 2% in the control group.Interestingly, this ADHD group with hoarding tendencies had an average age in their thirties, and approximately half were male.Overall, hoarding severity was higher in the ADHD group compared to controls.Notably, inattention stood out as the single most significant predictor of hoarding severity in patients.Independent Study Verification:An independent online UK sample was assessed to verify these findings.The study reiterated the findings, with inattention, depression, and anxiety emerging as the top predictors for hoarding.Approximately 3.2% of this sample identified having clinically significant hoarding tendencies.Implications:The research suggests a clear overlap between ADHD, particularly inattention, and HD.Medical professionals should be vigilant in assessing HD in individuals diagnosed with ADHD.Despite the potential to adversely impact daily functioning, patients with ADHD might not spontaneously disclose their hoarding issues.There's a need for HD research to consider younger adults with ADHD, a demographic that offers a different age and gender distribution than what has been traditionally studied.Conclusion:Hoarding Disorder and ADHD might seem worlds apart, but as Dr. Morein's insights reveal, they could be intertwined in ways we've never imagined. With increasing awareness and timely intervention, we can provide better support and treatment strategies for those grappling with these challenges.Join us next week as we delve deeper into another exciting topic. Stay curious and stay informed!https://dx.doi.org/10.1016%2Fj.jpsychires.2021.12.024