2,867 results match your criteria: "TN 37235; Vanderbilt University Center for Structural Biology[Affiliation]"

Targeting adhesion G protein-coupled receptors. Current status and future perspectives.

Structure

December 2024

Rudolf Schönheimer Institute of Biochemistry, Medical Faculty, Leipzig University, 04103 Leipzig, Saxony, Germany. Electronic address:

Article Synopsis
  • * The unique structure and complex interactions of aGPCRs pose challenges in pharmacological studies, despite recent advancements in understanding their activation mechanisms and structures.
  • * This review focuses on small molecule ligands for the ADGRGs subfamily of aGPCRs, discussing the hurdles in drug discovery and the potential of these ligands for developing new therapies against various diseases.
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Purpose: Broad-based molecular testing with next-generation sequencing (NGS) is now the standard of care in advanced non-small cell lung cancer (NSCLC). Two approaches to molecular testing are (1) reflexive testing at pathologic NSCLC confirmation, often using an in-house molecular panel, and (2) send-out testing to private vendors, ordered by a clinician. This study explored the outcomes with reflex versus send-out testing.

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Specialization Restricts the Evolutionary Paths Available to Yeast Sugar Transporters.

Mol Biol Evol

November 2024

Laboratory of Genetics, J. F. Crow Institute for the Study of Evolution, Center for Genomic Science Innovation, DOE Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI 53726, USA.

Article Synopsis
  • Functional innovation at the protein level plays a significant role in evolution, with specific constraints depending on each protein's unique history and structure.
  • The study focuses on a recent functional innovation in an α-glucoside transporter from the yeast Saccharomyces eubayanus, revealing that novel substrate transport requires complex interactions among various protein regions.
  • By analyzing genome data from 332 Saccharomycotina yeast species, the research suggests that these α-glucoside transporters evolved from a multifunctional ancestor and underwent subfunctionalization, making the acquisition of new functions challenging but possible through specific genetic changes.
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Spatially heterogeneous lipid dysregulation in tuberculous meningitis.

Neurobiol Dis

November 2024

Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA; Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. Electronic address:

Tuberculous (TB) meningitis is the deadliest form of extrapulmonary TB which disproportionately affects children and immunocompromised individuals. Studies in pulmonary TB have shown that Mycobacterium tuberculosis can alter host lipid metabolism to evade the immune system. Cholesterol lowering drugs (i.

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From 2015 to 2020, shootings by police injured or killed 1769 people annually in the United States, disproportionately harming members of minoritized groups. Prior studies of the structural determinants of these inequities have largely examined state-level aggregations and fatal outcomes. This study aimed to: 1) describe state and county variation in fatal and nonfatal injurious shootings by police, and 2) analyze the relationship between state and county context and differences in county rates of injurious shootings by police.

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Auditory gating and its clinical correlates in adults with chronic tic disorder and neurotypical adults.

Clin Neurophysiol

December 2024

Department of Pediatrics, Marcus Autism Center, Emory University School of Medicine, 1920 Briarcliff Rd, NE, Atlanta, GA 30329, USA. Electronic address:

Article Synopsis
  • - Over 80% of adults with chronic tic disorder (CTD) show sensory over-responsivity (SOR), which is an increased sensitivity to normal sensory stimuli, potentially linked to sensory gating impairments.
  • - The study compared sensory gating in neurotypical adults and those with CTD using clinical assessments and EEG monitoring, finding that CTD adults had higher levels of SOR but no significant differences in key auditory gating measures.
  • - Results indicated that while there was a relationship between N100 gating and SOR, sensory gating impairments may not be the main cause of SOR in CTD, suggesting the need for more research on this relationship.
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NUP98 fusion proteins and KMT2A-MENIN antagonize PRC1.1 to drive gene expression in AML.

Cell Rep

November 2024

Department of Pediatric Oncology, Dana-Farber Cancer Institute, and Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA 02215, USA. Electronic address:

Control of stem cell-associated genes by Trithorax group (TrxG) and Polycomb group (PcG) proteins is frequently misregulated in cancer. In leukemia, oncogenic fusion proteins hijack the TrxG homolog KMT2A and disrupt PcG activity to maintain pro-leukemogenic gene expression, though the mechanisms by which oncofusion proteins antagonize PcG proteins remain unclear. Here, we define the relationship between NUP98 oncofusion proteins and the non-canonical polycomb repressive complex 1.

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Inertial coupling of the hummingbird body in the flight mechanics of an escape manoeuvre.

J R Soc Interface

October 2024

Department of Mechanical Engineering, Vanderbilt University, 2301 Vanderbilt Place, Nashville, TN 37235-1592, USA.

When a hovering hummingbird performs a rapid escape manoeuvre in response to a perceived threat from the front side, its body may go through simultaneous pitch, yaw and roll rotations. In this study, we examined the inertial coupling of the three-axis body rotations and its effect on the flight mechanics of the manoeuvre using analyses of high-speed videos as well as high-fidelity computational modelling of the aerodynamics and inertial forces. We found that while a bird's pitch-up was occurring, inertial coupling between yaw and roll helped slow down and terminate the pitch, thus serving as a passive control mechanism for the manoeuvre.

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The evolution of gestation length in eutherian mammals.

Proc Biol Sci

October 2024

Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA.

Eutherian mammals exhibit considerable variation in their gestation lengths, which has traditionally been linked to variation in other traits, including body mass and lifespan. To understand how gestation length variation, including its association with body mass and lifespan variation, changed over mammalian evolution, we conducted phylogeny-informed analyses of 845 representative extant species. We found that gestation length substantially differed in both whether and how strongly it was associated with body mass and lifespan across mammals.

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Continuum robots navigate narrow, winding passageways while safely and compliantly interacting with their environments. Sensing the robot's shape under these conditions is often done indirectly, using a few coarsely distributed (e.g.

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Article Synopsis
  • Tissue engineering aims to repair damaged tissues, utilizing scaffolds that provide structural support for cell growth while ensuring they are biocompatible and nontoxic.
  • Poly(ε-caprolactone) (PCL) is a popular biopolymer for scaffolds due to its mechanical strength and biodegradability, but it has limitations like low cell adherence.
  • Innovations such as blending biomaterials and creating electrospun PCL-based scaffolds with tunable properties can enhance their effectiveness in tissue engineering applications.
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Wasserstein task embedding for measuring task similarities.

Neural Netw

January 2025

Computer Science Department, Vanderbilt University, 2201 W End Ave, Nashville, 37235, TN, United States.

Measuring similarities between different tasks is critical in a broad spectrum of machine learning problems, including transfer, multi-task, continual, and meta-learning. Most current approaches to measuring task similarities are architecture-dependent: (1) relying on pre-trained models, or (2) training networks on tasks and using forward transfer as a proxy for task similarity. In this paper, we leverage the optimal transport theory and define a novel task embedding for supervised classification that is model-agnostic, training-free, and capable of handling (partially) disjoint label sets.

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(1) Background/Objectives: Delayed esophageal perforation following anterior cervical (spine) discectomy and fusion (ACDF) is rare but can lead to serious infectious complications. The treatment usually involves hardware explanation and prolonged intravenous antibiotics; however, there are scarce reports about the microbiology of these infections and corresponding targeted therapy. (2) Methods: Patients diagnosed or treated for delayed esophageal perforation after anterior cervical fusion between 2000-2020 at a tertiary medical center were studied.

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Adsorption of aqueous insensitive munitions compounds by graphene nanoplatelets.

J Hazard Mater

December 2024

Department of Civil and Environmental Engineering, Vanderbilt University, PMB 351831, 2301 Vanderbilt Place, Nashville, TN 37235-1831, USA.

Mitigation strategies for potential environmental impacts of insensitive munition (IM) compounds, including 2,4-dinitroanisole (DNAN), 3-nitro-1,2,4-triazol-5-one (NTO), nitroguanidine (NQ), and methylnitroguanidine, (MeNQ) are being considered to enhance sustainability of current or potential IM formulations. Graphene nanoplatelets (GnPs) were investigated for adsorptive removal of each compound. GnPs were characterized to determine surface areas, along with particle size and zeta potential at different pH and ionic strength conditions.

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The Systemic Effect of Ischemia Training and Its Impact on Bone Marrow-Derived Monocytes.

Cells

September 2024

DeWitt Daughtry Family Department of Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, FL 33136, USA.

Objective: Monocytes are innate immune cells that play a central role in inflammation, an essential component during neovascularization. Our recent publication demonstrated that ischemia training by 24 h unilateral occlusion of the femoral artery (FA) can modify bone marrow-derived monocytes (BM-Mono), allowing them to improve collateral remodeling in a mouse model of hindlimb ischemia. Here, we expand on our previous findings, investigating a potential systemic effect of ischemia training and how this training can impact BM-Mono.

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Diastereoselective (3+3) cycloaddition between bicyclobutanes and pyridinium ylides forms azabicyclo[3.1.1]heptanes pyridine dearomatization.

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Uncovering lipid dynamics in Staphylococcus aureus osteomyelitis using multimodal imaging mass spectrometry.

Cell Chem Biol

October 2024

Mass Spectrometry Research Center, Vanderbilt University, Nashville, TN 37235, USA; Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA; Department of Biochemistry, Vanderbilt University, Nashville, TN 37235, USA; Department of Medicine, Vanderbilt University, Nashville, TN 37235, USA; Department of Pharmacology, Vanderbilt University, Nashville, TN 37235, USA.

Article Synopsis
  • Osteomyelitis is caused by Staphylococcus aureus invading bone, leading to abscess formation characterized by specific cell and molecule arrangements.
  • Advanced imaging techniques like mass spectrometry and microscopy were used to examine the lipid profiles of infected murine femurs, identifying nearly 250 lipids related to both healthy and infected tissue.
  • Changes in ether and arachidonoyl lipids suggest involvement in abscess formation and inflammation, while unique distributions of other lipids point to altered metabolism in immune cells, enhancing our understanding of chronic infection dynamics.
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We report 10 experiments exploring the proposition that memory retrieval is perceptual attention turned inward. The experiments adapt the Eriksen and Eriksen perceptual flanker effect to a memory task in which subjects must decide whether a cued item in a probe display appeared in the same position in a memory list. Previous research with this episodic flanker task found distance and compatibility effects like those in the perceptual flanker task, suggesting that the same attentional spotlight is turned inward in memory retrieval.

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Article Synopsis
  • Predictive coding helps the brain make guesses about what we will hear or sense next, which involves different brain waves working together.
  • When monkeys were put to sleep with a drug, their brains stopped using these guessing signals, which changed how they reacted to unexpected sounds.
  • This study shows that being aware of things (consciousness) is linked to how well the brain predicts and processes information, and when we’re unconscious, those predictions don’t work like they should.
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Ribosomally synthesized and posttranslationally modified peptides (RiPPs) constitute a diverse class of natural products. Atropopeptides are a recent addition to the class. Here we developed AtropoFinder, a genome mining algorithm to chart the biosynthetic landscape of the atropopeptides.

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Flow-electrode capacitive separation of organic acid products and recovery of alkali cations after acidic CO electrolysis.

Proc Natl Acad Sci U S A

October 2024

State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.

Acidic CO electrolysis, enhanced by the introduction of alkali cations, presents a strategic approach for improving carbon efficiency compared to processes conducted in neutral and alkaline environments. However, a significant challenge arises from the dissolution of both organic acids and alkali cations in a strongly acidic feed stream, resulting in a considerable energy penalty for downstream separation. In this study, we investigate the feasibility of using flow-electrode capacitive deionization (FCDI) technology to separate organic acids and recover alkali cations from a strongly acidic feed stream (pH ~ 1).

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Mosquitoes cannot use metabolism to regulate their body temperature and therefore climate warming is altering their physiology. Mosquitoes also experience a physiological decline with aging, a phenomenon called senescence. Because both high temperature and aging are detrimental to mosquitoes, we hypothesized that high temperatures accelerate senescence.

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Local organization of spatial and shape information in the primate prefrontal cortex.

Cereb Cortex

September 2024

Department of Biomedical Engineering, Vanderbilt University, 2201 West End Ave, Nashville TN 37235, United States.

The current understanding of sensory and motor cortical areas has been defined by the existence of topographical maps across the brain surface, however, higher cortical areas, such as the prefrontal cortex, seem to lack an equivalent organization, and only limited evidence of functional clustering of neurons with similar stimulus properties is evident in them. We thus sought to examine whether neurons that represent similar spatial and object information are clustered in the monkey prefrontal cortex and whether such an organization only emerges as a result of training. To this end, we analyzed neurophysiological recordings from male macaque monkeys before and after training in spatial and shape working memory tasks.

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Intracellular Ebola virus nucleocapsid assembly revealed by in situ cryo-electron tomography.

Cell

October 2024

Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Department of Medicine, University of California, San Diego, La Jolla, CA 92037, USA. Electronic address:

Filoviruses, including the Ebola and Marburg viruses, cause hemorrhagic fevers with up to 90% lethality. The viral nucleocapsid is assembled by polymerization of the nucleoprotein (NP) along the viral genome, together with the viral proteins VP24 and VP35. We employed cryo-electron tomography of cells transfected with viral proteins and infected with model Ebola virus to illuminate assembly intermediates, as well as a 9 Å map of the complete intracellular assembly.

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This work establishes the design of a fully synthetic, shear-thinning hydrogel platform that is injectable and can isolate engineered, allogeneic cell therapies from the host. We utilized RAFT to generate a library of linear random copolymers of N,N-dimethylacrylamide (DMA) and 2-vinyl-4,4-dimethyl azlactone (VDMA) with variable mol% VDMA and degree of polymerization. Poly(DMA-co-VDMA) copolymers were subsequently modified with either adamantane (Ad) or β-cyclodextrin (Cd) through amine-reactive VDMA to prepare hydrogel precursor macromers containing complementary guest-host pairing pendant groups that, when mixed, form shear-thinning hydrogels.

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