98 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. Evolutionary Biology
    2. Neuroscience

    Physiological constraint on acrobatic courtship behavior underlies rapid sympatric speciation in bearded manakins

    Meredith C Miles et al.
    Skeletal muscle performance sets the course of rapid speciation by defining the evolutionary trajectory of reproductive behavior.
    1. Neuroscience

    Functional limb muscle innervation prior to cholinergic transmitter specification during early metamorphosis in Xenopus

    Francois M Lambert et al.
    Molecular labeling, electrophysiology and calcium imaging have revealed a novel switching of neurotransmitter at the frog neuromuscular junction where motoneurons transiently release glutamate before acetylcholine at synapses on developing hindlimb muscles at the onset of metamorphosis.
    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.
    1. Developmental Biology

    Neural crest-specific deletion of Rbfox2 in mice leads to craniofacial abnormalities including cleft palate

    Dasan Mary Cibi et al.
    The identification of the splicing code and all the required components of alternative splicing will be crucial for a comprehensive understanding of this process in the neural crest cell biology.
    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.

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