103 results found
    1. Evolutionary Biology

    Giant extinct caiman breaks constraint on the axial skeleton of extant crocodylians

    Torsten M Scheyer et al.
    The giant caiman Purussaurus from the Miocene of Venezuela is the first recorded member of crown Crocodylia having three sacrals, thus breaking the otherwise strict vertebral constraint of the group.
    1. Developmental Biology

    Segmentation of the zebrafish axial skeleton relies on notochord sheath cells and not on the segmentation clock

    Laura Lleras Forero et al.
    In contrast to amniotes, zebrafish (ray-finned fish, teleost) centra are formed from specialised notochord sheath cells, and the segmental patterning of these cells is independent of the segmentation clock.
    1. Developmental Biology
    2. Evolutionary Biology

    Resegmentation is an ancestral feature of the gnathostome vertebral skeleton

    Katharine E Criswell, J Andrew Gillis
    Shared complexities of backbone segmentation between cartilaginous fishes and tetrapods originate much earlier in vertebrate evolution than previously thought.
    1. Developmental Biology

    Lin28a/let-7 pathway modulates the Hox code via Polycomb regulation during axial patterning in vertebrates

    Tempei Sato et al.
    Genetic analyses reveal that the loss of Lin28a causes axial shortening with mild skeletal transformations via decreased PRC1 at Hox genes, establishing a new pathway in the “Hox code.”.
    1. Neuroscience

    Mechanosensory neurons control the timing of spinal microcircuit selection during locomotion

    Steven Knafo et al.
    Bioluminescence monitoring and selective silencing in zebrafish larva reveal a novel sensorimotor circuit modulating speed in the moving spinal cord.
    1. Cell Biology
    2. Stem Cells and Regenerative Medicine

    PCGF6-PRC1 suppresses premature differentiation of mouse embryonic stem cells by regulating germ cell-related genes

    Mitsuhiro Endoh et al.
    PCGF6 links sequence specific target recognition by the MAX/MGA transcription factor complex to PRC1 (polycomb repressive complex 1) -dependent transcriptional silencing of germ cell-specific genes in mouse pluripotent stem cells.
    1. Cell Biology

    Curvature-induced expulsion of actomyosin bundles during cytokinetic ring contraction

    Junqi Huang et al.
    Cytokinetic actomyosin ring disassembly occurs through a novel mechanism in which the increased ring curvature, generated through contraction, itself promotes the disassembly process.
    1. Chromosomes and Gene Expression

    PLZF targets developmental enhancers for activation during osteogenic differentiation of human mesenchymal stem cells

    Shuchi Agrawal Singh et al.
    A key transcription-factor for osteogenic differentiation, PLZF, acts as a transcriptional activator by binding to active developmental enhancers and facilitates mediator recruitment, but is not involved in enhancer looping.
    1. Human Biology and Medicine

    Stimulation of Piezo1 by mechanical signals promotes bone anabolism

    Xuehua Li et al.
    Mechanical stimuli activate Piezo1 in osteoblast lineage cells and thereby promote bone formation in part via Wnt1.

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