450 results found
    1. Physics of Living Systems

    Epithelial colonies in vitro elongate through collective effects

    Jordi Comelles et al.
    Spontaneous elongation of epithelial colonies is related to the orientation of the mean nematic cell elongation field, as shown and tested with experiments and theory.
    1. Developmental Biology
    2. Plant Biology

    A digital 3D reference atlas reveals cellular growth patterns shaping the Arabidopsis ovule

    Athul Vijayan et al.
    Deep imaging, machine-learning-based segmentation, and tissue annotation resulted in a developmental series of 3D digital ovules with cellular resolution allowing next-level analysis of the ontogenesis of this complex organ.
    1. Neuroscience

    TrpML-mediated astrocyte microdomain Ca2+ transients regulate astrocyte–tracheal interactions

    Zhiguo Ma, Marc R Freeman
    Astrocyte microdomain calcium transients are mediated by TrpML, stimulated by ROS and tyramine, and mediate astrocyte–tracheal interactions in CNS gas exchange.
    1. Neuroscience

    The actin-modulating protein synaptopodin mediates long-term survival of dendritic spines

    Kenrick Yap et al.
    Long-term imaging of dentate granule cells reveals that the presence of synaptopodin within large spines, rather than their size, conveys long-term stability to large spines.
    1. Developmental Biology

    SlitC-PlexinA1 mediates iterative inhibition for orderly passage of spinal commissural axons through the floor plate

    Hugo Ducuing et al.
    A combination of in vivo models and imaging techniques reveals the distribution of guidance cues and their mechanisms of action during commissural axon navigation of intermediate target.
    1. Developmental Biology
    2. Evolutionary Biology

    Secondary ossification center induces and protects growth plate structure

    Meng Xie et al.
    The principle underlying the appearance of the growth plate, an organ responsible for longitudinal growth, has implications for various cartilage pathologies including growth abnormalities in children, trauma and osteoarthritis.
    1. Neuroscience

    Small molecule cognitive enhancer reverses age-related memory decline in mice

    Karen Krukowski et al.
    Inhibition of the integrated stress response restores neuronal and immune dysfunction and alleviates memory deficits in aged mice.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Ebola and Marburg virus matrix layers are locally ordered assemblies of VP40 dimers

    William Wan et al.
    Cryo-electron tomography reveals the structure and arrangement of the VP40 matrix protein lattice that mediates the formation of Ebola and Marburg virus particles.
    1. Physics of Living Systems

    Diffusion vs. direct transport in the precision of morphogen readout

    Sean Fancher, Andrew Mugler
    A theory predicts whether diffusion or direct transport establishes a more precise morphogen profile, and this prediction explains data from a wide variety of morphogens in two different organisms.
    1. Developmental Biology
    2. Physics of Living Systems

    Size-dependent patterns of cell proliferation and migration in freely-expanding epithelia

    Matthew A Heinrich et al.
    Epithelia exhibit size-dependent growth dynamics caused by a decoupling between boundary and bulk cellular dynamics that enable robust expansion and drive cell cycling, collective migration, and tissue-spanning vortices.

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