60 results found
    1. Cell Biology

    Actin assembly ruptures the nuclear envelope by prying the lamina away from nuclear pores and nuclear membranes in starfish oocytes

    Natalia Wesolowska et al.
    Combined light and electron microscopy reveals a new function for Arp2/3-mediated actin assembly in nuclear envelope rupture, which leads to a separation of nuclear membranes and pores from the lamina.
    1. Cell Biology

    A disassembly-driven mechanism explains F-actin-mediated chromosome transport in starfish oocytes

    Philippe Bun et al.
    On entry to meiosis, chromosomes scattered in the large oocyte nucleus of starfish are collected by an F-actin network, which contracts by an unexpected, myosin-independent mechanism based on local assembly and global disassembly of actin filaments.
    1. Developmental Biology
    2. Genetics and Genomics

    Gap junctions deliver malonyl-CoA from soma to germline to support embryogenesis in Caenorhabditis elegans

    Todd A Starich et al.
    Malonyl-CoA, the rate-limiting substrate for fatty acid synthesis, is produced in the soma and delivered through gap junctions to the germline to promote reproduction and coordinate it with nutritional status.
    1. Evolutionary Biology

    Ancient role of sulfakinin/cholecystokinin-type signalling in inhibitory regulation of feeding processes revealed in an echinoderm

    Ana B Tinoco et al.
    Starfish feed by everting their stomach out of their mouth over prey and, interestingly, this unusual feeding mechanism is inhibited by substances similar to hormones that regulate feeding in humans.
    1. Evolutionary Biology
    2. Neuroscience

    Echinoderms provide missing link in the evolution of PrRP/sNPF-type neuropeptide signalling

    Luis Alfonso Yañez-Guerra et al.
    Discovery of a novel neuropeptide signalling system in a deuterostome invertebrate reveals the evolutionary origin of prolactin-releasing peptide and its relationship with neuropeptides in protostome invertebrates.
    1. Cell Biology

    Selective dephosphorylation by PP2A-B55 directs the meiosis I-meiosis II transition in oocytes

    S Zachary Swartz et al.
    Time-course phosphoproteomics reveals that selective dephosphorylation is critical for directing the MI/MII transition and that, through its inherent phospho-threonine preference, PP2A-B55 imposes specific phosphoregulated behaviors that distinguish the two meiotic divisions.
    1. Evolutionary Biology
    2. Neuroscience

    Metazoan evolution of glutamate receptors reveals unreported phylogenetic groups and divergent lineage-specific events

    David Ramos-Vicente et al.
    The animal phylogeny of glutamate receptors indicates that vertebrate types do not account for all receptor classes originated during evolution, neither are they the pinnacle of a linear evolutive process.
    1. Cell Biology
    2. Stem Cells and Regenerative Medicine

    Cell-cycle quiescence maintains Caenorhabditis elegans germline stem cells independent of GLP-1/Notch

    Hannah S Seidel, Judith Kimble
    C. elegans germline stem cells become quiescent under starved conditions, and this quiescence maintains the stem cell state even in the absence of GLP-1/Notch signaling, which is otherwise essential for stem cell maintenance.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Human axial progenitors generate trunk neural crest cells in vitro

    Thomas JR Frith et al.
    Pluripotent stem cell differentiation provides insight into how neural crest subtypes of distinct axial identity are patterned in human embryos.
    1. Medicine

    Knowledge synthesis of 100 million biomedical documents augments the deep expression profiling of coronavirus receptors

    AJ Venkatakrishnan et al.
    SARS-CoV-2 receptor ACE2 is expressed in nasal olfactory epithelia, tongue keratinocytes and small intestine enterocytes, connected with the COVID-19 patient phenotypes such as anosmia and diarrhea.

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