PLAY PODCASTS
Science Society

Science Society

286 episodes — Page 6 of 6

Carbon-Negative Fermentation for Sustainable Acetone and Isopropanol Production with Dr. Leang

Dr. Leang and team have developed a pioneering carbon-negative fermentation technique to produce industrial chemicals, specifically acetone and isopropanol, using waste gases like industrial emissions and syngas. Through extensive metabolic engineering and optimization strategies, the team was able to achieve production rates of up to 3 g/L/h and selectivity of ~90%. The approach not only sidesteps the use of sugars (a common but economically challenging feedstock) but also has the added benefit of utilizing greenhouse gases, thus mitigating their environmental impact.Key Points:Waste Gases as Feedstock: While sugar fermentation has its limitations due to scale and economic challenges, utilizing waste gases allows decoupling from commodity prices. This innovative process converts waste into ethanol using the acetogen C. autoethanogenum, setting the stage for production of other chemicals.Enhanced Productivity: The team achieved impressive production rates and selectivity for acetone and IPA using engineered strains of the acetogen. This proves that acetogens can be optimized for high-efficiency chemical production.Optimization Strategy:Pathway Design: The team delved into a vast genomic library to find the best biosynthetic genes, resulting in significantly enhanced production.Strain Engineering: Advanced engineering techniques, including multiple genome modifications, enabled the creation of a highly productive strain.Pathway Bottleneck Analysis: A blend of omics measurements, kinetic modeling, and systems biology led to insights into pathway bottlenecks and their subsequent mitigation.Scale-Up Success: Successful scale-up was achieved using a 120-L field pilot, underlining the commercial viability of the approach. Despite the challenges inherent to gas fermentation scale-up, the process showed robustness and adaptability.Environmental Benefits: This fermentation technique has a twofold environmental benefit. Not only does it produce chemicals without relying on fossil fuels, but it also captures and uses greenhouse gases, thus reducing their atmospheric release. Life Cycle Analysis confirmed that this process results in a negative carbon footprint for the produced chemicals.Towards a Circular Economy: By transforming waste gases into valuable industrial chemicals, this process exemplifies the principles of a circular economy. Rather than extracting fresh fossil resources, it promotes the recycling of carbon from various waste streams, paving the way for a sustainable and environmentally friendly chemical industry.Implications:The success of this research signifies a significant stride towards sustainable chemical production. The ability to transform greenhouse gases into valuable commodities not only addresses environmental concerns but also offers promising economic prospects. By bridging innovation in biotechnology with environmental responsibility, such processes can revolutionize the future of the chemical industry.https://doi.org/10.1038/s41587-021-01195-w

Apr 10, 2022

Decoding Human Uniqueness: microRNA Genes and Our Evolutionary Journey with Dr. Lents

Today's episode welcomes Dr. Nathan Lents, who shares enlightening revelations about the genetic foundation of what sets humans apart from other apes. Using an array of advanced tools and methods, Dr. Lents and his team embarked on a journey to uncover the mysteries of the human genome.The Quest for Human Uniqueness:The genetic underpinnings of our unique human traits remain an area of profound intrigue in biological anthropology.Approach and Methods:By employing genome alignment tools, the team aimed to find islands of DNA sequences that aren't conserved among species.Further, they engaged in theoretical and computational examinations of these regions via synteny sequence analysis.Discoveries on Human Chromosome 21:The study unveiled families of microRNA genes present only in humans, with no discernible counterparts in other African apes.These genes potentially play roles in the embryonic development of our central nervous system, setting the stage for distinctive neural growth and processes.Origin of These Unique Genes:The team postulated a fascinating model: these microRNA genes likely originated from repeated segmental duplication events within a field of rRNA genes.This suggests an evolutionary adaptation, where a series of duplications generated entirely new microRNA genes.Evolutionary Implications:The unique 21p11 region of our chromosome 21 has seen duplication events that brought forth novel microRNA genes.The modulation of genes linked to embryonic development by these microRNA genes could have significantly impacted our evolutionary path, possibly accounting for certain human-specific traits or cognitive capacities.Conclusion:Dr. Nathan Lents provides a captivating window into our genomic past, proposing that certain microRNA genes, birthed from a series of genetic duplications, might have influenced the very essence of our human journey. Such discoveries not only unravel the tapestry of our evolutionary history but also shed light on the nuanced genetic mechanisms that have sculpted our species.Stay tuned for more intriguing episodes as we continue to explore the fascinating realms of science and discovery. Join us next time, and always keep the flame of curiosity burning bright!https://doi.org/10.1002/ajpa.24504

Apr 10, 20221h 5m

Unlocking Ice's Secrets: Transitions, Symmetries, and H-Bond Dynamics with Dr. Salamat: Exogeology

In today's episode, we're diving deep into the mysterious world of ice structures with Dr. Salamat. By utilizing advanced techniques like X-ray diffraction and Raman spectroscopy, his research provides novel insights into the transitions and behavior of ice under extreme conditions.Methods and Techniques:The study combined the use of X-ray diffraction and Raman spectroscopy. Grain normalizing heat treatment was achieved via direct laser heating, ensuring precise results.Transition from Ice-VII to Ice-VIIₜ:At pressures around 5.1 ± 0.5 GPa, a transition was observed from cubic ice-VII to tetragonal symmetry, denoted as ice-VIIₜ.H-Bond Symmetrization Transition:A significant event in the H2O structure is the H-bond symmetrization transition. This occurs at a pressure of about 30.9 ± 3 GPa.Supporting Evidence from Simulations:The experimental findings were backed by simulated Raman spectra obtained from density-functional theory quantum calculations.Significance of the H-bond Symmetrization:The transition to H-bond symmetrization is marked by the reversible appearance of a distinct Raman mode.Accompanying this, there's a 2.5-fold jump in the bulk modulus, indicating a substantial enhancement in bonding strength.Conclusion:Dr. Salamat's research paints a detailed picture of the intricate behavior of ice structures under high pressure. The discovery of the transitions in ice structures and the nuances of H-bond symmetrization adds depth to our understanding of the material properties and potential applications of such phases of ice.Join us next time for another illuminating dive into the realms of science. Let's continue our journey of discovery and always strive to understand the wonders of the world around us.https://doi.org/10.1103/PhysRevB.105.104109

Apr 10, 20222h 22m

Weekly recap Mar 28 till April 2 2022

Did you miss our guest speaker sessions? Is listening to hours of replays too time-consuming? Join us for the weekly recap rooms!

Apr 10, 20222h 9m

Mimicking the Brain: The Promise of Organic Neuromorphic Electronics with Dr. Paschalis Gkoupidenis

Today's episode delves into the captivating realm of neuromorphic electronics with expert Dr. Paschalis Gkoupidenis. He presents a groundbreaking exploration into emulating the brain's functional connectivity using organic neuromorphic devices.The Brain's Dynamic Binding:Neural populations in the brain synchronize through global oscillations, creating functional connectivity. This adaptability surpasses the hardwired structure, enabling complex, versatile computational systems. Current Limitations in Neuromorphic Architecture:Existing neuromorphic designs have yet to capture the fluidity of biological functional connectivity. Functional Connectivity via Organic Neuromorphic Devices:Arrays of organic neuromorphic devices were connected through an electrolyte.Despite receiving independent stochastic inputs, the outputs synchronized with a global oscillatory input, akin to phase locking in the brain.Analogies with Biological Networks:Functional connectivity in the brain allows spatiotemporal coordination across regions through global oscillations.The observed phenomena in the study resemble voltage oscillations stemming from synchronized neural ensembles.Future Applications and Implications:Introducing synchronization could offer more biologically realistic neuromorphic architectures.Global oscillations can be used to modulate memory thresholds in an array of electrochemical devices, potentially enabling phase-dependent learning.Concepts like traveling waves in electrolytes might pave the way for innovative neuromorphic designs.The universality of electrolyte gating can be applied across diverse device materials.These synchronization techniques have potential applications in bioelectronics, such as interfacing with biological cell cultures.Conclusion:Dr. Gkoupidenis illuminates the vast potential of organic neuromorphic electronics. By closely mirroring the brain's dynamism, these devices could revolutionize how we approach computing, data processing, and even bioelectronics. The future beckons with the promise of devices that aren't just inspired by the brain but replicate its intricate mechanisms.As we step into a future melding technology with biology, let's remain curious and inspired. Join us again as we explore more pioneering research and innovations in the world of science.https://doi.org/10.1002/aisy.201900013

Apr 3, 20221h 41m

Beyond Divergent Thinking: A Dive into Narrative Theory and Creativity with Dr. Fletcher

Today, we venture into the intricate world of creativity with Dr. Fletcher. As an essential source of innovation and adaptability, understanding creativity has become vital for numerous sectors. Join us as Dr. Fletcher introduces an alternative approach to understanding and training creativity through narrative theory.Reevaluating Creativity Training:Creativity's value is undisputed; yet, the foundational training technique, divergent thinking, has its limitations. Concerns include its incongruence with the creative processes observed in children and many adults, and its underwhelming results.Introducing Narrative Theory to Creativity:Dr. Fletcher proposes narrative theory as a fresh perspective to advance our understanding of creativity. It offers a comprehensive mechanism that aligns with J.P. Guilford's demystification of creativity but expands upon it.Addressing Gaps in Current Creativity Theory:Divergent thinking doesn't explain children's creative processes, leading to a schism between child and adult creativity research.Narrative theory can bridge this gap and unify the field by translating insights from child creativity studies to adult contexts.Practical Implications of Narrative Theory:Narrative theory pinpoints divergent thinking's limitations while promoting existing methods that nurture children's creativity.The approach suggests new, assessable training techniques. Early adoption by the U.S. military and other major institutions indicates its practical relevance.Expanding the Horizons of Creativity Training:Guilford's traditional divergent thinking approach remains valid; narrative theory simply offers an expansion, recognizing creativity's reach beyond computation.Emphasizes the role of action-based neural processes in creativity, evident in children's "possibility thinking" and prevalent in adult innovations.Conclusion:Dr. Fletcher makes a compelling case for the integration of narrative theory into our understanding and training of creativity. By acknowledging the limitations of divergent thinking and the potential of narrative theory, we can reshape how we nurture creativity across all age groups, leading to transformative impacts in various domains, from national security to personal growth.As we continue our exploration into the depths of human creativity, Dr. Fletcher's insights offer a beacon for future research and training methods. Stay tuned for our next episode where we unravel another exciting facet of human cognition.https://doi.org/10.1111/nyas.14763

Apr 3, 20221h 27m

Shining New Light on Chiral Molecules: Innovations in CPL Bio-Imaging with Dr. MacKenzie

Today, we delve into a groundbreaking frontier in bio-imaging with Dr. MacKenzie, who is pioneering methods to observe and understand the world of chiral molecular interactions – an area that, up to now, was challenging to visualize.The Significance of Chirality:Life's molecular machinery relies on chiral building blocks, yet monitoring these in live cells remained elusive.Luminescent chiral molecules provide a unique optical signature, shedding light on the environment, shape, and binding state.Introducing the CPL Laser Scanning Confocal Microscope (CPL-LSCM):This revolutionary device can capture chiroptical contrast in live-cell imaging of both natural and designed CPL-active cellular probes.Achievements also include the success of using two-photon excitation, fully restoring the CPL spectrum in the process.Major Breakthroughs:CPL-LSCM System: This breakthrough allows for rapid, diffraction-limited enantioselective chiral-contrast imaging, advancing the sub-cellular tracking of emissive chiral probes.2PE-CPL Spectroscopy: Proves that low-energy 2PE-CPL-LSCM is primed for future advancements.Test Target for Enantioselective Chiral-Contrast Imaging: A standard tool was developed using enantiopure solutions of a europium complex to benchmark future imaging systems.Imaging Specific Enantiomers: Imaging of distinct enantiomers of a chiral europium complex within mouse skin fibroblast cells showed significant co-localisation with standard lysosomal and mitochondrial tracker dyes.Potential Impacts & Applications:Set to transform fundamental studies in chemistry and molecular biology.Can aid in advancing the design of chiral bio-probes.In material sciences, applications extend to 3D display technologies and the verification of innovative CPL-active security inks.Conclusion:Dr. MacKenzie's innovations herald a new era in bio-imaging, offering researchers unprecedented insights into the world of chiral interactions. By capturing the essence of life's foundational chiral processes, CPL-LSCM provides a beacon for myriad future discoveries in the intertwined realms of chemistry, biology, and materials science.As we shine a new light on the intricacies of life's molecular dance, we eagerly await the future revelations this field holds. Join us next time for more groundbreaking research insights into the world of science.https://doi.org/10.1038/s41467-022-28220-z

Apr 3, 20221h 38m

Exploring Quantum Phases: From Equilibrium to the Discrete Time Crystal with Dr. Pedram Roushan

Join us today with Dr. Pedram Roushan from Google Research as we dive deep into the world of quantum many-body systems. We'll explore the fascinating phenomena of dynamical phases and the concept of discrete time crystals (DTC), revealing the wonders of out-of-equilibrium quantum systems.Nature's Non-equilibrium State:Quantum many-body systems have rich phase structures in low-temperature equilibrium states.However, nature often exists out-of-equilibrium, leading to intriguing dynamical phases not seen in equilibrium.The Novelty of Dynamical Phases:Recent predictions suggest dynamical phases might exist that are forbidden by conventional equilibrium thermodynamics.A prime example is the discrete time crystal (DTC).Understanding Eigenstate Order:Dynamical phases in periodically driven many-body-localized (MBL) systems are defined via eigenstate order.These MBL phases display quantum correlations and long-range order across the entire many-body spectrum, resulting in unique late-time dynamics.Challenges and Experimental Achievements:It's tough to differentiate stable phases from temporary phenomena in experiments.Dr. Roushan's team utilized controlled-phase (CPHASE) gates on superconducting qubits, allowing them to observe an MBL-DTC and its unique spatiotemporal response.Time-Reversal and Quantum Typicality:The team employed a time-reversal protocol to gauge external decoherence effects.Leveraging quantum typicality, they overcame the exponential challenge of sampling the eigenspectrum densely.Discovering the Phase Transition:The team identified the transition out of the DTC through a finite-size analysis, paving the way for future quantum processors.Conclusion:Dr. Pedram Roushan's groundbreaking work offers a fresh perspective on understanding quantum many-body systems and non-equilibrium phases of matter. By uncovering the mysteries of the discrete time crystal and its associated dynamical phases, we move a step closer to realizing the full potential of quantum processors.Quantum mechanics never ceases to amaze, and with pioneers like Dr. Roushan leading the way, the future of quantum research looks brighter than ever. Stay with us for the next episode, where we continue our journey into the quantum realm.https://doi.org/10.1038/s41586-021-04257-w

Apr 3, 20221h 26m

Weekly Science Society Recap Mar 21 till 27 2022

Did you miss our rooms? Did you have more questions comments that we didn’t have time to clarify? Join our weekly recap rooms! We will give a summarized overview of what our guest speakers presented.

Apr 3, 202258 min

Lithium and Dementia: A New Hope for Prevention? with Dr. Chen

In today's episode, we're joined by Dr. Chen to discuss a pressing concern for the elderly: dementia. As one of the primary causes of death among senior Western populations, the race is on to find treatments or preventive measures for dementia. Dr. Chen enlightens us about an intriguing potential solution: lithium.The Dementia Dilemma:Dementia stands as a dominant cause of death in elderly Westerners.Despite extensive research, no disease-modifying treatments are currently available.Lithium: A Potential Answer?Lithium, typically known for its psychiatric applications, has been proposed as a possible treatment for dementia.Study Design and Methodology:Dr. Chen's team carried out a retrospective cohort study spanning 15 years using electronic clinical records from secondary care mental health services in the UK.The main aim was to understand the relationship between lithium use and dementia onset, focusing on specific subtypes of the condition.Key Findings:Out of 29,618 patients studied, 548 had been exposed to lithium.Notably, lithium-exposed patients had a significantly lower risk of developing dementia, including both Alzheimer's disease and vascular dementia, when factors like demographics and physical comorbidities were controlled.Both short-term and long-term lithium users exhibited this reduced risk, hinting at the potential protective power of the element.Addressing Limitations:The primary challenge was managing the overlap between bipolar affective disorder (BPAD), a frequent reason for lithium prescription, and dementia, since BPAD is also a risk factor for dementia.Although the sample size for lithium users was relatively small, the findings remained consistent across multiple analyses, bolstering their reliability.Implications and Future Directions:These results suggest lithium may be more than just a psychiatric drug; it might play a role in preventing or even treating dementia.The findings pave the way for more expansive, randomized controlled trials to validate and expand upon these results.Conclusion:The link between lithium use and a reduced risk of dementia offers a beacon of hope in the long-standing battle against this debilitating condition. As Dr. Chen emphasizes, further research is essential, but the initial findings are promising and hint at a brighter future for dementia prevention and treatment.A big thank you to Dr. Chen for sharing this groundbreaking research with us. Stay tuned for our next episode, where we continue to explore the forefront of medical research.https://doi.org/10.1371/journal.pmed.1003941

Apr 3, 20221h 2m

Zentropy Theory: Understanding Temperature and Volume Anomalies in Materials with Dr. Liu

Today we welcome Dr. Zi-Kui Liu, a distinguished figure in the realm of Materials Science. With a career spanning decades and encompassing education, research, leadership, and entrepreneurship, Dr. Liu has made significant contributions to our understanding of materials and their properties.Dr. Zi-Kui Liu's Journey:Dr. Liu's academic journey took him from Central South University to University of Science and Technology Beijing, culminating with a PhD from the Royal Institute of Technology, Sweden. His professional career has seen him take on roles at University of Wisconsin-Madison, Questek Innovation, LLC, and a longstanding association with The Pennsylvania State University. A pioneer in the field, Dr. Liu coined the term “Materials Genome®” in 2002 and founded several institutions that further materials science research and application.Recognitions and Achievements:Dr. Liu's work has been widely recognized with numerous awards and positions of leadership in renowned international institutions like ASM International and TMS.Focus of Research:His research revolves around the fusion of quantum, statistical, and irreversible thermodynamics to predict and model material properties.Particularly intriguing is the zentropy theory, a groundbreaking approach developed by Dr. Liu and his team.Zentropy Theory Explained:The theory emerged from an observation: certain materials shrink as they heat, a phenomenon that was previously not entirely understood.Using thermodynamic relations, the zentropy theory provides a comprehensive understanding of why volume sometimes decreases with temperature increase.This theory explains that high-temperature phases are statistical representations of various configurations—both stable and metastable. When certain configurations with high probabilities occupy smaller volumes than the ground-state configuration, the material's volume can decrease with rising temperature.The zentropy theory also has broader applications, potentially helping to predict anomalies in other physical properties of phases.Case Studies:Dr. Liu provides real-world examples, highlighting the behavior of materials like Ce and Fe3Pt. These examples showcase the temperature and pressure combinations that can lead to either positive or negative thermal expansions.Conclusion:Dr. Zi-Kui Liu's zentropy theory offers a groundbreaking perspective on understanding the sometimes counterintuitive behaviors of materials. By identifying and predicting these anomalies, scientists and engineers can potentially harness these properties for innovative applications in technology and industry.We extend our gratitude to Dr. Liu for sharing his invaluable insights. Stay connected for more episodes where we uncover the mysteries of the material world.http://dx.doi.org/10.1007/s11669-022-00942-z

Mar 27, 20222h 11m

Mapping the Mind: Psychedelics, Consciousness, and the Brain with Dr. Danilo Bzdok

In this intriguing episode with Dr. Danilo Bzdok, we delve deep into how psychedelics potentially influence our consciousness by altering the way our higher association cortex processes sensory signals. By examining 6,850 testimonials on 27 different drugs and comparing them against 40 neurotransmitter receptor subtypes, Dr. Bzdok paints a comprehensive picture of the connection between drug-induced changes in awareness and their corresponding locations in the brain. The result? An innovative approach that highlights how our experiences with these substances relate to the balance between higher-level association and sensory input. Discover how the intricate dance between language, the brain, and consciousness can shed light on the effects of various psychoactive molecules.Keywords:PsychedelicsConsciousnessHigher association cortexSensory signalsTestimonialsNeurotransmitter receptor subtypesDrug-induced changesReceptor density proxiesLarge-scale networksNatural language descriptionsSemantic structureBrain mapping.https://doi.org/10.1126/sciadv.abl6989

Mar 27, 20221h 44m

The Adhesive Dance: Neurite Placement and Circuit Formation with Dr. Titas Sengupta

In an engaging conversation with Dr. Titas Sengupta, we delve into the intricate processes guiding the placement of neurites in specific neural layers during brain development. Utilizing groundbreaking imaging techniques and advanced quantitative models, Dr. Sengupta unveils his findings on the embryonic development of the C. elegans brain neuropil. At the core of this exploration lies the profound role of differential adhesion, orchestrated by the interaction between IgCAM SYG-1 and its ligand partner, SYG-2. Rather than the anticipated outgrowth method, neurites are found to employ a unique "retrograde zippering" mechanism, which governs their precise placement. Through this study, Dr. Sengupta bridges the realm of biophysics with neural development, offering fresh perspectives on how synaptic specificity is achieved in the developing brain.Keywords:NeuritesSynaptic specificityC. elegans brain neuropilDifferential adhesionIgCAM SYG-1SYG-2Retrograde zipperingNeural developmentCircuit formationBiophysical principlesNeurite placement.https://doi.org/10.7554/eLife.71171.sa0

Mar 27, 20221h 7m

Electric Ballet: Deciphering the Secrets of Spider Ballooning with Dr. Habchi and Dr. Jawed

E

In a captivating conversation with Dr. Habchi and Dr. Jawed, we take a deep dive into the enigmatic world of spider ballooning. Using state-of-the-art three-dimensional numerical simulations and the discrete elastic rods method, they explore the hypothesis that spiders' ballooning mechanism is influenced by the electric charge dynamics between spider silk threads and the Earth's atmospheric electric potential. Validated with experimental data, their research examines two unique cases of electric charge distribution: uniformly spread across the threads and concentrated at the thread tip. Intriguing findings reveal how terminal ballooning velocity is affected differently in both cases, with a striking observation of a three-dimensional conical sheet formed due to the threads' electric charges preventing entanglement. This episode is an enlightening journey into the interplay of biology, physics, and nature's unmatched engineering prowess.Keywords:Spider ballooningThree-dimensional simulationsDiscrete elastic rods methodElectric chargeEarth's atmosphereTerminal ballooning velocityElastic bending stiffnessViscous forcesCoulomb repelling forcesThread entanglement.https://doi.org/10.1103/PhysRevE.105.034401

Mar 27, 20221h 59m

Beyond Menopause: FSH's Role in Alzheimer's and New Frontiers in Treatment with Dr. Keqiang Ye

In this enlightening episode with Dr. Keqiang Ye, we journey into the fascinating connection between Alzheimer's disease and rising levels of follicle-stimulating hormone (FSH) in the body, particularly during the menopausal transition. With alarming evidence suggesting an accelerated cognitive decline in older women, Dr. Ye reveals groundbreaking research that shows FSH’s direct influence on neurons, contributing to the development of Alzheimer’s. Interestingly, blocking FSH’s action shows not only potential in treating Alzheimer’s but also other conditions like obesity, osteoporosis, and dyslipidaemia. As we move away from traditional beliefs about pituitary glycoproteins and acknowledge their broader influences on our system, the episode sheds light on exciting possibilities for innovative treatments targeting multiple conditions simultaneously.Keywords:Alzheimer’s diseaseFollicle-stimulating hormone (FSH)Menopausal transitionCognitive declineNeuronal C/EBPβ–δ-secretase pathwayOsteoporosisObesityDyslipidaemiaTreatmentPituitary glycoproteinsBone massFSH-blocking agent.https://doi.org/10.1038/s41586-022-04463-0

Mar 27, 20222h 14m

Harnessing piRNAi for Advanced Gene Silencing: Deep Dive with Dr. Priyadarshini

In the episode featuring Dr. Priyadarshini, the spotlight is on the innovative use of single-guide Piwi-interacting RNAs (piRNAs) to guide the piRNA pathway for specific gene silencing in the Caenorhabditis elegans organism, which encompasses the hermaphrodite germline, sperm, and embryos. Termed as piRNA-mediated interference (piRNAi), this method presents a more efficient and scalable approach than traditional RNAi. A unique characteristic of piRNAi is its ability for conditional gene silencing and induction of transgenerational epigenetic silencing, suggesting its potential for in-depth studies on transgenerational inheritance. When benchmarked against other gene-silencing methods, piRNAi stands out for its programmability and efficiency. However, it's not without limitations, such as its germline-specific expression and the need for transgene injections. Yet, Dr. Priyadarshini emphasizes the vast potential of piRNAi, especially in the context of exploring the realms of piRNA biology and epigenetic silencing.Keywords:piRNAiGene silencingCaenorhabditis elegansTransgenerational epigenetic silencingPRG-1RNAiEpigeneticGerm-lineEndogenous genesCRISPR interference (CRISPRi).https://doi.org/10.1038/s41592-021-01369-z

Mar 20, 20221h 8m

Dr. Mavridou on Antibiotic Resistance and Bacterial Proteostasis

Novel Strategy to Tackle Antibiotic Resistance: Dr. Mavridou's research presents a novel approach to combat antibiotic resistance. By targeting a single non-essential bacterial protein, DsbA, the team was able to inhibit multiple antibiotic resistance (AMR) determinants.DsbA and its Role: DsbA, a protein unique to bacteria, plays a significant role in the function of various resistance enzymes. By inhibiting this protein, the research team managed to sensitize certain pathogens to existing antibiotics, making those drugs effective once again.β-lactamase Enzymes and DsbA: A significant focus was placed on β-lactamase enzymes, which confer resistance to a range of antibiotics. By targeting DsbA, these enzymes were incapacitated, especially those that aren't affected by classical β-lactamase inhibitors. This is especially relevant as many clinically important pathogens possess these enzymes.MCR Enzymes and Colistin Resistance: The rise of MCR enzymes has made the antibiotic colistin, often a last-resort drug, less effective. However, since MCR enzymes contain multiple disulfide bonds, inhibiting the DSB system could reverse this resistance.Efflux Pump Inhibitors: There's a notable absence of clinically viable efflux pump inhibitors. While the impact of DsbA on efflux pumps was modest, the relationship between DsbA and pump function was underscored, pointing towards future areas of exploration.Potential of Cell Envelope Proteostasis: The bacterial cell envelope's protein management system has significant untapped potential. The DSB system, once considered merely a maintenance system, is crucial for bacterial adaptation. It's essential for virulence, plays a role in the life cycle of bacterial persister cells, and, crucially, is vital for bacterial survival against antibiotics.Clinical Implications: The study showcases the potential of targeting bacterial proteostasis pathways. Inhibiting such systems in pathogens could lead to more effective treatment methods that neutralize AMR determinants and disarm virulence factors.Conclusion: Dr. Mavridou's research offers a groundbreaking approach to countering antibiotic resistance. By understanding and targeting bacterial proteostasis, especially the DSB system, there's potential to develop novel therapeutic strategies, reinvigorate the efficacy of existing antibiotics, and provide a framework for future antibiotic research.https://doi.org/10.7554/eLife.57974

Mar 20, 20221h 26m

Dr. Cunningham on White Dwarf Atmospheres and Accretion

Dr. Cunningham's findings throw fresh light on the enigmatic heavy-element pollution in white dwarf atmospheres. With the direct evidence from X-rays and the newly deduced accretion rates, the research reshapes our understanding of the processes at play in these ancient stellar remnants and suggests a need for refined models to fully capture the complexities unfolding in these stars.White Dwarf Pollution: A significant number of white dwarf stars possess atmospheres tainted by heavy elements. These elements, intriguingly, should vanish from sight in a relatively short time due to gravitational settling.Accretion Hypothesis: The presence of these heavy elements has long been thought to signify ongoing accretion (a process where matter accumulates onto a central body) of debris, possibly remnants of asteroids, comets, or even large planets. This theory gains strength from certain observations of debris discs and transiting planetary fragments near some white dwarfs.Indirect Evidence: While these metals in a white dwarf's atmosphere hint towards accretion, they don't provide direct evidence. Relying on them to infer accretion rates or deduce the composition of the debris has its challenges and heavily leans on models of how these elements move and mix within the white dwarf's atmosphere.X-ray Discovery from G29–38: Dr. Cunningham's breakthrough was the notable detection of X-rays emanating from a metal-polluted white dwarf named G29–38. This discovery allows for a more direct measure of the accretion rate, which turns out to be independent of the atmospheric models previously relied upon.Accretion Rate: From these X-ray observations, they determined an instantaneous accretion rate. This rate surpasses previous estimations based on studying the white dwarf's surface heavy element concentrations.Implications for Modelling: The higher-than-expected accretion rate might indicate that there's more happening beneath the visible layers of the white dwarf than currently understood. The mention of "convective overshoot" suggests that models may need to account for more vigorous mixing processes.Low Plasma Temperature: They recorded a plasma temperature of around 0.5 ±0.2 keV 0.5±0.2keV, which backs up a theory suggesting that white dwarfs with low accretion rates are bombarded by incoming debris.https://doi.org/10.1038/s41586-021-04300-w

Mar 20, 20221h 9m

Dr. Cocucci on Curvature in Endocytic Clathrin Coats

Endocytic Clathrin Coats and Curvature: The episode kicks off with an introduction to endocytic clathrin coats. These are structures that form on a cell's surface to help internalize extracellular molecules. An essential step in this process involves curving a flat piece of the cell membrane into a vesicle, which the endocytosis machinery facilitates.Initial Findings: Contrary to previous beliefs, the formation of clathrin pits doesn't depend on a late-stage flat-to-curved transition. The curvature actually starts developing from the early stages of their formation. This revelation challenges existing models of clathrin coat formation. Additionally, membrane tension, or the tautness of the cell surface, doesn't seem to affect how these clathrin pits generate curvature.Use of Super-Resolved Imaging: Dr. Cocucci’s team employed advanced, super-resolved live cell fluorescence imaging to monitor clathrin-coated pit formation in real-time. This technique allowed them to observe these processes in both cultured cells and tissues of developing organisms with unparalleled clarity.Flat-to-Curved Transition Models: Such models hypothesized that significant changes in clathrin coat structure were needed for vesicle formation. These changes would involve substantial alterations in the size (or "footprint") and brightness of the clathrin structures before domes and pits could form. However, Dr. Cocucci's observations challenge this idea. While they don't deny the possibility of such transitions, their data suggest a continuous curvature generation process from the outset of clathrin pit formation without any late-stage drastic transitions.Role of CALM Adaptors: An intriguing observation was the distinct clustering of CALM adaptors beneath clathrin structures, while another protein, AP2, distributed more evenly. CALM is known to play a role in both detecting and driving curvature. The team proposes that these CALM clusters could increase local strain on the clathrin structures, potentially causing them to break and complete pit formation, especially at the edges.Dr. Cocucci's groundbreaking work, backed by high-resolution imaging, offers a revised understanding of how clathrin-coated pits form and generate curvature on the cell membrane. By highlighting the early onset of curvature and the unique roles of CALM adaptors, this study has significant implications for our grasp of endocytosis and cell biology as a whole.https://doi.org/10.1016/j.devcel.2021.10.019

Mar 20, 2022

Dr. Rhee on The Interplay of Musicality and Linguistic Pitch Development in Children

Complex Nature of Vocal Pitch: Dr. Rhee reiterates that vocal pitch isn't just about the F0 (fundamental frequency). It encompasses both F0 and other acoustic cues, which are crucial for linguistic understanding.Musicality and Pitch in Language Development: Recent studies suggest that musicality influences how learners develop pitch perception in sentence intonation and prosodic emphasis. Dr. Rhee’s research delves deep into this relationship, focusing on Mandarin—a tonal language.Research Methodology: 43 Mandarin-speaking children (ages 4 to 6) were tested on tone production and musicality. The study measured how contrasting their tones were across age and musicality levels using acoustic cues.Pitch Development Findings: While primary F0 cues show a gradual development from ages 3-8, the cues using spectral components or their integration with F0 show a more delayed progression. Notably, blending F0 and spectral cues doesn't significantly enhance tone contrast until age 6.Musicality’s Influence on Pitch Development: Higher musicality boosts tone contrast in children aged 4 and 5, irrespective of pitch cue type. By age 6, this advantage dwindles, aligning with findings from other studies. Dr. Rhee posits that younger kids, who are still refining their vocal pitch control, might be more influenced by auditory feedback. This is where musicality, or pitch perception ability, could play a pivotal role in their tone production.Considerations and Limitations: Dr. Rhee acknowledges potential pitfalls. The study's relatively small sample size, especially in the 4-5 age bracket, might not capture the full spectrum of development. Continuous variables like age and musicality were grouped into categories. Also, the study assessed musicality from a perceptual angle and linguistic pitch cues only in production, hinting at the need for a more holistic research approach in the future.Conclusion: In a groundbreaking exploration, Dr. Rhee unravels the intricate web connecting musicality and linguistic pitch cue development. Young Mandarin-speaking kids with better musicality show accelerated lexical tone production growth. Given the importance of pitch in tonal languages, this discovery is monumental. Future studies are anticipated to expand on these insights, offering a more comprehensive view of musicality's role across various linguistic structures and languages. https://doi.org/10.3389/fnins.2022.804042

Mar 20, 20221h 45m

Dr. Alonim on Early Autism Detection and Intervention

Origins of the Study: Researchers at Bar-Ilan University, including Dr. Hanna A. Alonim from the Weisfeld School of Social Work Continuing Education Unit, spearheaded two vital studies, focusing on early autism detection and intervention.10-year Long Study with 110 Infants: Before being diagnosed with ASD at ages 2-3, video recordings of these infants during their first year, shot by unsuspecting parents, were examined. Several autism traits were discerned, such as an aversion to touch, delayed motor skills, erratic activity levels, limited reactions, an accelerated head growth rate, eating resistance, and lack of eye contact. Furthermore, the interplay between these symptoms was scrutinized.Key Finding: A staggering 89% of autism indicators were evident when the infants were merely 4-6 months old. However, these signs often escaped the parents’ notice during filming.Highlighting Early Intervention: The second study emphasized the value of early intervention, analyzing the effectiveness of the Mifne Approach on two toddler age groups: 1-2 and 2-3 years old. Rooted in family therapy and attachment theory, the Mifne Approach ensures comprehensive family support, encompassing physical, motor, sensory, emotional, and cognitive development.Outcomes of Early Detection and Therapy: By narrowing the time between early diagnosis and therapy, neurodevelopment deviations can be significantly curbed.Dr. Alonim’s Insight: Highlighting a pivotal "window of opportunity," Dr. Alonim asserts the profound impact of early detection and intervention on the swiftly evolving infant brain. She underscores the urgency of bridging the chasm between initial detection, assessment, and intervention for any infant at potential risk.Expert Commentary: Mark Blakey, CEO of Autism Parenting Magazine, applauds the research, underscoring the potential of early intervention in fostering greater independence in later life. He encourages parents to explore this subject further and recommends their guide article on recognizing autism in babies and toddlers.Conclusion: With groundbreaking studies, Dr. Alonim and her team have illuminated the promise of early autism detection and the profound, transformative power of timely intervention. Their research heralds a new dawn in autism care, pointing towards brighter futures for countless children.

Mar 20, 20221h 11m

Dr. Bellone on SHANK3 Gene Mutations and Autism

Dr. Bellone discusses how mutations in the SHANK3 gene are a recognized genetic risk factor for Autism Spectrum Disorder (ASD).It's noted that while these mutations are typically associated with autism in humans, mice with heterozygous deletion of the Shank3 gene don't typically show ASD-like behaviors.1. Role of the Shank3 gene in mice: - Downregulating the Shank3 gene in the Nucleus Accumbens of neonatal mice results in increased excitability in specific neurons and impairs social behavior. - When genetically vulnerable mice are exposed to inflammation, they display similar behavioral changes. These changes can be reversed with acute inhibition of a particular receptor (Trpv4). 2. Importance of the Nucleus Accumbens in ASD: - Human studies have shown that the Nucleus Accumbens (NAc) is activated by social stimuli, and this activation is disrupted in ASD patients. - The activity of the direct pathway in the NAc is crucial for social behavior. Both increased, and decreased activity can lead to reduced sociability in mice.3. The role of the environment and critical developmental periods: - Synaptic connections and brain circuits undergo changes during developmental "critical periods". How these critical periods affect ASD is still being explored. - Early downregulation of Shank3 in the NAc leads to social deficits. However, Shank3 downregulation in adulthood does not have the same impact.4. Connection between Shank3 and Trpv4: - Loss of Shank3 increases the expression of Trpv4. Trpv4 plays a role in calcium signaling and affects neuronal excitability. - Trpv4 upregulation was specifically observed in young mice with Shank3 downregulation but not in older mice. - Inflammation in Shank3+/− mice resulted in increased Trpv4 expression, which was connected to behavioral deficits. Blocking Trpv4 helped mitigate these deficits.5. Immune system and ASD: - Inflammation and immune system activation have been connected to ASD in several studies. - Dr. Bellone's team found that inducing inflammation in genetically predisposed mice resulted in transient social deficits, suggesting a potential interplay between genetic vulnerability and immune response.6. Potential therapeutic implications: - Trpv4 has emerged as a novel potential therapeutic target for addressing social deficits in ASD. - The relationship between immune response, genetics, and neuronal activity in ASD points to potential avenues for treatments.The research underscores the intricate interplay between genetics, the environment, and neuronal activity in the context of ASD. Region-specific ablation of Shank3 in mice offers insights into the mechanisms underlying autism-related symptoms and points to potential therapeutic interventions.https://doi.org/10.1038/s41380-021-01427-0

Mar 13, 20221h 13m

The Gut-Brain Connection: Decoding 4EPS and Behavioral Impacts with Dr. Needham

In a revealing interview with Dr. Brittany Needham, listeners are introduced to the profound relationship between gut microbiota and brain behavior. Dr. Needham's study uncovers the role of a specific gut-derived molecule, 4EPS, in influencing neurodevelopment in mice. The episode delves into the journey of dietary tyrosine's conversion into 4EPS, the impact of bioengineered bacteria on mouse behavior, and the pivotal role of oligodendrocytes in the myelination of neuronal axons. Notably, the episode sheds light on how 4EPS-exposed mice display anxiety-like behaviors and how these effects can be mitigated through specific pharmacological treatments. The conversation underscores the significance of the gut-brain axis, emphasizing the potential implications for mental health and well-being. Keywords: Gut microbiota, 4EPS (4-ethylphenyl sulfate), neurodevelopment, dietary tyrosine, 4EP, bioengineered bacteria, brain activity, functional connectivity, oligodendrocyte function, myelination, neuronal axons, anxiety-like behaviors, gut-brain axis https://doi.org/10.1038/s41586-022-04396-8

Mar 13, 20221h 10m

The Sleep and Psyche Connection: Unraveling 5-HT2ARs and Schizophrenia with Dr. Gallitano

In a captivating episode featuring Dr. Gallitano, the audience is taken on a deep dive into the intricate relationship between the Serotonin 2A receptors (5-HT2ARs) and their potential role in schizophrenia—a mental disorder marked by perceptual and cognitive anomalies. Dr. Gallitano shares pivotal findings that highlight how sleep deprivation, a commonplace environmental stimulus, can significantly amplify the levels of 5-HT2AR in the mouse frontal cortex in a mere span of hours. The linchpin in this discovery is the gene transcription factor "early growth response 3 (Egr3)," which was found to be critical for this upregulation. Further explorations reveal that EGR3 protein directly interacts with the promoter of the Htr2a gene, the gene responsible for encoding 5-HT2AR, thereby modulating its levels in the cortex. Delving into post-mortem gene expression data, it becomes evident that both EGR3 and HTR2A mRNA are diminished in schizophrenia patients, hinting at a potential linkage. This episode sheds light on a plausible mechanism by which everyday environmental factors might tweak receptor levels in the brain, influencing the manifestation and possible treatment pathways for mental disorders.Keywords: Serotonin 2A receptors (5-HT2ARs), psychedelic drugs, schizophrenia, sleep deprivation, early growth response 3 (Egr3), frontal cortex, gene transcription, Htr2a gene, environmental stimuli, mental illness treatment.http://dx.doi.org/10.1038/s41380-021-01390-w

Mar 13, 20222h 29m

Deciphering Quantum Gravity with Quantum Computing, Machine Learning, and Holography by Dr. Rinaldi

Embarking on the quest to unify quantum mechanics with general relativity has opened doors to a fascinating realm of theoretical physics. Dr. Rinaldi delves deep into the intricacies of matrix quantum mechanics—a tool pivotal for our understanding of quantum black holes and holographic duality. This episode dives into how new-age computational tools, like quantum computing and deep learning, maybe the game-changers we need to truly grasp and solve matrix models, shedding light on enigmas like quantum gravity and the role of entanglement. Join us as we explore how two specific matrix models, akin to those used to study black holes, are analyzed using cutting-edge quantum algorithms and neural networks. These groundbreaking methodologies might be our ticket to studying quantum gravity, not in the vast expanse of the universe, but right here in our labs and on our computers. Dive into the future of quantum physics with us!http://dx.doi.org/10.1103/PRXQuantum.3.010324

Mar 13, 2022

Revolutionizing X-Ray Imaging: Dr. Schwartz's Leap into Advanced Chemical Element Mapping

In this riveting episode, Dr. Schwartz takes us on a journey into the intricate world of chemical element mapping—a tool vital for understanding complex materials. Traditional X-ray fluorescence methods, while powerful, are hampered by slow speeds and resolution constraints. Dr. Schwartz introduces a game-changing approach, leveraging computational ghost imaging and compressed sensing to sidestep these challenges. By eliminating the need for focusing and sample movement, his method boosts resolution and slashes measurement time. But that's just the tip of the iceberg! Listen as we explore how this technique can potentially revolutionize medical imaging by enhancing the visibility of soft tissues without upping radiation doses. Moreover, we delve into its potential applications in safeguarding passenger privacy in full-body scanners and pushing the boundaries of imaging resolution down to the nanoscale. Join us for a deep dive into the future of imaging, where speed, precision, and versatility take center stage. https://doi.org/10.1364/OPTICA.441682

Mar 12, 20221h 6m

Microdosing LSD: Myth or Magic? Dr. Molla's Deep Dive into Psychedelic Science

In this compelling episode, we join Dr. Molla as she delves into the controversial and widely-debated practice of microdosing with LSD. Amidst the backdrop of a psychedelic renaissance in mental health, thousands assert that taking minimal amounts of LSD can elevate mood and sharpen cognitive prowess. But is there scientific weight behind these claims? Dr. Molla walks us through her meticulous double-blind controlled study, which explores the effects of small LSD doses on mood, cognition, and emotional responsiveness. The findings might surprise many ardent microdosing proponents. Listen in to uncover the truth about this modern practice—demystifying myths, highlighting nuances, and offering a sober perspective on microdosing in a world chasing transformative experiences. Don't miss this illuminating conversation that marries anecdotal claims with rigorous scientific scrutiny.Repeated low doses of LSD in healthy adults: A placebo-controlled, dose-response study. https://doi.org/10.1111/adb.13143

Mar 12, 20221h 35m

Decoding Anxiety: Dr. Khalsa Sheds Light on the Interoceptive Dysfunctions in GAD

Join us on a deep dive into the world of generalized anxiety disorder (GAD) with Dr. Khalsa. This episode unravels the intricacies of how our body perceives internal sensations, especially during heightened moments of anxiety. Why do some individuals feel their heart race or breath quicken more intensely than others? Using a groundbreaking study, Dr. Khalsa investigates how those with GAD respond to β-adrenergic stimulation, a key driver of such symptoms. Leveraging advanced neuroimaging, the research uncovers a distinct relationship between GAD, heart palpitations, dyspnea, and activity in the ventromedial prefrontal cortex. Discover the potential implications of these findings for future treatments, and gain a deeper understanding of the physiological and neural intricacies that characterize GAD. If you've ever been curious about the science behind anxiety or wondered about the internal mechanisms that shape our emotional experiences, this episode promises a captivating exploration into the heart of GAD. http://jamanetwork.com/article.aspx?doi=10.1001/jamapsychiatry.2021.4225

Mar 6, 20221h 20m

Challenging the Norm: Dr. Weigel and Dr. Monroe Explore Evolutionary Mutation Bias

Mutation has long been understood as a random force in evolution. But what if we've had it wrong all along? In today's intriguing episode, we're joined by renowned evolutionary biologists Dr. Weigel and Dr. Monroe to challenge this long-held notion.Journey into the microscopic world of the plant Arabidopsis thaliana, a model organism in plant genetics, as our guests unveil their groundbreaking research findings. The revelations are startling: mutations occur far less frequently in vital parts of the genome than we've believed. Delve into the extensive datasets, surveys, and experiments that led to this conclusion.But this isn't just a tale of numbers and plants. Dr. Weigel and Dr. Monroe weave a compelling narrative that challenges a century-old evolutionary paradigm, showcasing how mutation is not as aimless a force as once thought. Their research indicates that epigenome-associated mutation biases could play a significant role in guiding evolution, painting a fresh picture of how mutations might occur in nature.Through their findings, they shed light on why certain genes might exhibit fewer variations and how environmental factors could further influence these mutations. As we explore this intricate dance of genetic changes, we're also prompted to consider how these revelations might apply beyond the world of Arabidopsis.Prepare to have your understanding of evolution upended and redefined as we navigate the complex terrain of mutation bias. Whether you're an evolutionary aficionado or a casual science enthusiast, this episode promises insights and perspectives that could reshape biological evolution's narrative. Join us for a deep dive into the evolving story of mutation with Dr. Weigel and Dr. Monroe.https://doi.org/10.1038/s41586-021-04269-6

Mar 6, 20221h 19m

Deciphering Predictions: Sounak Mohanta Explores the Brain Mechanics Behind Expectations

Predicting what comes next is an innate human ability honed through our lifetime of experiences. Imagine hearing a siren and instinctively looking for an ambulance; this seemingly simple act involves intricate brain functions and neural mechanics. In today's episode, we journey into the depths of these mechanisms with Sounak Mohanta, an expert at the intersection of neuroscience, machine learning, and computational frameworks.Using cutting-edge techniques like high-density EEG and Bayesian modeling, Mohanta's research unravels the intricate dance of frontal alpha activity and reaction times, shedding light on how our brains use past information to predict future events. Dive deeper to understand the pivotal role of α and β waves in facilitating these predictions.But what happens when these prediction mechanisms are interrupted? With the introduction of ketamine, an NMDAR blocker, Mohanta uncovers startling revelations about how drugs can tamper with our predictive capabilities, potentially holding keys to understanding disorders like schizophrenia.Join us as we traverse the neural pathways of predictions, delve into the role of oscillations in neural activity, and decode the significance of our brain's statistical learning. Whether you're a neuro-enthusiast or simply curious about the magic behind everyday human predictions, this episode promises a thrilling exploration into the world of expectation.http://dx.doi.org/10.1523/JNEUROSCI.1311-21.2021

Mar 6, 20221h 18m

Redefining Fungal Pathogens: Dr. Krasileva on Computational Structural Genomics on Magnaporthe oryzae

In a world where fungal pathogens wreak havoc on global food production, understanding their arsenal is of paramount importance. Enter the mysterious realm of Magnaporthe oryzae, a notorious fungal attacker, with Dr. Krasileva, our esteemed guest for today's episode.Dive deep as we navigate the vast universe of the fungal pathogen's secreted proteins. Dr. Krasileva unravels her team's ambitious efforts to predict the structures of a whopping 1,854 proteins. Harnessing the power of machine learning and the revolutionary TrRosetta, they're able to map out the intricate designs of these proteins, laying bare potential effectors and virulence factors.But this journey isn't just about numbers and predictions. As Dr. Krasileva artfully illustrates, structure-based clustering reveals hidden secrets about these proteins, uncovering relationships and parallels that go beyond mere sequences. Through her narrative, we uncover intriguing evolutionary tales, such as the fascinating evolution of ADP-ribose transferases.Beyond the impressive science, there's a vital underlying message: the importance of computational structural genomics in the fight against phytopathogens. With pathogens constantly evolving and posing new threats, having a deep understanding of their molecular machinery is crucial for developing effective counter-strategies.Whether you're a seasoned researcher, an aspiring biologist, or simply someone fascinated by the complex interplay of pathogens and their hosts, this episode with Dr. Krasileva promises a captivating journey. Uncover the hidden stories within Magnaporthe oryzae and explore how cutting-edge computational techniques are changing the game in the battle against fungal foes.https://doi.org/10.1094/MPMI-03-21-0071-R

Feb 25, 20221h 9m

Traumatic Stress & Brain Plasticity with Dr. Daniela Kaufer: Increased Myelin Linked to Anxiety and PTSD

This episode delves deep into the fascinating world of brain responses to traumatic stress with esteemed expert, Dr. Daniela Kaufer. Earning her B.Sc. from the Technion Israel Institute of Technology and her Ph.D. from the Hebrew University of Jerusalem, Dr. Kaufer has passionately navigated her academic journey, culminating in her role as Principal Investigator at UC Berkeley. Beyond her remarkable academic pursuits, she finds solace in reading, yoga, meditation, and spending quality time in nature with her family.Dr. Kaufer provides insights from her recent captivating study, which explored the biological variance in reactions to traumatic stress. While reactions differ significantly across individuals, the mechanisms underlying these variations remain elusive. The study shines light on the often-overlooked role of oligodendrocytes and myelin in this context, hinting at their potential involvement in the traumatic-stress-induced alterations in the adult brain.The research took a comprehensive approach, integrating both rat models and human subjects - specifically trauma-exposed US veterans. Through a multimodal study, they unearthed a region-specific correlation between oligodendrocyte cell density, myelin basic protein (MBP), and stress-induced behaviors. For instance, they found a direct connection between stress-induced avoidance and the hippocampal dentate gyrus' oligodendrocytes and MBP.Further validating their findings, the team identified similar patterns in trauma-exposed veterans, where magnetic resonance imaging revealed a direct association between hippocampal and amygdala myelin and symptom profiles.Join us as Dr. Kaufer unpacks these groundbreaking revelations and introduces us to a novel mechanism that might underpin the varied sensitivity levels individuals showcase towards traumatic stress. Discover the intricate dance of brain plasticity, traumatic experiences, and the astonishing ways they intertwine to shape individual reactions.Traumatic Stress, Oligodendrocytes, Myelin, Behavioral Variation, Hippocampal Dentate Gyrus, Anxiety, Fear Learning, US Veterans, Magnetic Resonance Imaging, Brain Plasticity. http://dx.doi.org/10.1038/s41398-021-01745-5

Feb 24, 20221h 20m

Guest speaker Dr. Levine presents: Technological Approach to Mind Everywhere

Synthetic biology and bioengineering provide the opportunity to create novel embodied cognitive systems (otherwise known as minds) in a very wide variety of chimeric architectures combining evolved and designed material and software. These advances are disrupting familiar concepts in the philosophy of mind, and require new ways of thinking about and comparing truly diverse intelligences, whose composition and origin are not like any of the available natural model species. In this Perspective, I introduce TAME - Technological Approach to Mind Everywhere - a framework for understanding and manipulating cognition in unconventional substrates. TAME formalizes a non-binary (continuous), empirically-based approach to strongly embodied agency. When applied to regenerating/developmental systems, TAME suggests a perspective on morphogenesis as an example of basal cognition. The deep symmetry between problem-solving in anatomical, physiological, transcriptional, and 3D (traditional behavioral) spaces drives specific hypotheses by which cognitive capacities can scale during evolution. An important medium exploited by evolution for joining active subunits into greater agents is developmental bioelectricity, implemented by pre-neural use of ion channels and gap junctions to scale cell-level feedback loops into anatomical homeostasis. This architecture of multi-scale competency of biological systems has important implications for plasticity of bodies and minds, greatly potentiating evolvability. Considering classical and recent data from the perspectives of computational science, evolutionary biology, and basal cognition, reveals a rich research program with many implications for cognitive science, evolutionary biology, regenerative medicine, and artificial intelligence. https://doi.org/10.31234/osf.io/t6e8p

Feb 24, 20221h 33m

Guest speaker Dr. Jones presents: Stochastic microbiome assembly depends on context

Individuals are constantly exposed to microbial organisms that may or may not colonize their gut microbiome, and newborn individuals assemble their microbiomes through a number of these acquisition events. Since microbiome composition has been shown to influence host physiology, a mechanistic understanding of community assembly has potentially therapeutic applications. In this paper we study microbiome acquisition in a highly controlled setting using germ-free fruit flies inoculated with specific bacterial species at known abundances. Our approach revealed that acquisition events are stochastic, and the colonization odds of different species in different contexts encode ecological information about interactions. These findings have consequences for microbiome-based therapies like fecal microbiota transplantation that attempt to modify a person’s gut microbiome by deliberately introducing foreign microbes. https://doi.org/10.1073/pnas.2115877119

Feb 24, 20221h 43m

Revolutionizing Brain Imaging: Dr. Field on the Compact Kernel Flow TD-fNIRS System

Delve into the innovative world of brain imaging with Dr. Field as we discuss the latest breakthroughs in noninvasive optical brain imaging tools. The traditional TD-fNIRS system, a benchmark in optical brain imaging, has seen limited adoption due to its complex design and high costs. Dr. Field introduces us to the Kernel Flow, a game-changer that promises to democratize access to high-quality brain imaging.Kernel Flow's brilliance lies in its compactness and modularity, retaining the precision of traditional systems. Dr. Field and his team have ingeniously miniaturized various components, from laser drivers to specialized detectors, resulting in a device that can easily be worn and offers whole-head coverage.Our discussion traverses the intricate development journey of Kernel Flow, from the conceptual phase to testing its efficacy using standardized tissue and optical phantom protocols. Not only does Dr. Field showcase the system's comparable performance to its benchtop counterparts, but he also shares intriguing results from human brain studies.But the Kernel Flow's story doesn't end there. Dr. Field offers a glimpse into the future, hinting at expanded studies across diverse demographics to ensure the tool's adaptability and effectiveness.Join us on this enlightening journey with Dr. Field as we explore the future of noninvasive brain imaging. Whether you're a neuroscience enthusiast, a medical professional, or just someone curious about the marvels of modern science, this episode offers a riveting peek into the next frontier of brain research. DOI: 10.1117/1.JBO.27.7.074710

Feb 24, 20221h 13m

Bridging Quantum and Biology: The Tardigrade's Quantum Dance with Dr. Dumke and Team

In a groundbreaking episode, Dr. Dumke and his colleagues challenge the boundaries separating quantum mechanics and biological systems, two realms often seen as incompatible. Taking center stage is the tardigrade—a microscopic marvel known for its resilience against harsh conditions. Dr. Dumke's team leverages the tardigrade's unique ability to enter cryptobiosis, unveiling its potential to couple with a superconducting quantum bit and even achieve a state of entanglement. As the narrative unfolds, listeners will be captivated by the tale of this tiny creature's journey through extreme temperatures and pressures, culminating in its revival after a record-breaking stint in a quantum environment. Join us for a dive into a realm where the lines between life and quantum physics blur, challenging our understanding of both domains. https://doi.org/10.48550/arXiv.2112.07978

Feb 24, 20222h 8m