6,788 results found
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Adult stem cells and niche cells segregate gradually from common precursors that build the adult Drosophila ovary during pupal development

    Amy Reilein et al.
    Somatic stem and niche cells in the Drosophila ovary develop from common precursors through regulated proliferative expansion, followed by acquisition of position-specific behaviors, rather than through rigid early specification events.
    1. Structural Biology and Molecular Biophysics

    Transcription initiation at a consensus bacterial promoter proceeds via a ‘bind-unwind-load-and-lock’ mechanism

    Abhishek Mazumder et al.
    Single-molecule fluorescence experiments reveal transcription initiation proceeds via a 'bind-unwind-load-and-lock' mechanism where promoter DNA unwinds outside the RNA polymerase (RNAP) cleft, the unwound template-DNA loads into the cleft, and RNAP 'locks' the template-DNA by closing the RNAP clamp module.
    1. Developmental Biology
    2. Neuroscience

    Stretching of the retinal pigment epithelium contributes to zebrafish optic cup morphogenesis

    Tania Moreno-Mármol et al.
    Retinal pigment epithelium flattening is an efficient solution adopted by the fast-developing zebrafish to enable folding of the eye primordia, which contrasts with the proliferation-based mechanism used by amniotes.
    1. Neuroscience

    Proof of concept for multiple nerve transfers to a single target muscle

    Matthias Luft et al.
    A murine model for a novel surgical concept demonstrates potential advances of neuroprosthetic interfacing.
    1. Cancer Biology
    2. Computational and Systems Biology

    Integrated evaluation of telomerase activation and telomere maintenance across cancer cell lines

    Kevin Hu et al.
    Comprehensive analysis of telomere maintenance from transcriptomic, epigenetic, and loss-of-function profiles of cancer cell lines elucidates features of telomere regulation in cancer.
    1. Neuroscience

    Closed-loop auditory stimulation method to modulate sleep slow waves and motor learning performance in rats

    Carlos G Moreira et al.
    Delivery of auditory triggers as unique slow waves-targeting approach yields efficient, stable, and precise modulation of slow-wave activity in rats.
    1. Cell Biology
    2. Neuroscience

    HIF1α stabilization in hypoxia is not oxidant-initiated

    Amit Kumar et al.
    The current findings address the redox regulation of hypoxia inducible factor 1α (HIF1α) stability in hypoxia by showing that cytosolic, mitochondrial or lipid ROS are not necessary for HIF1α stabilization in hypoxia.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Retinoic acid signaling is directly activated in cardiomyocytes and protects mouse hearts from apoptosis after myocardial infarction

    Fabio Da Silva et al.
    Lineage tracing and genetic experiments resolve a long-standing controversy by showing that retinoic acid signaling is active in cardiomyocytes, both during development and after myocardial infarction, and protects damaged hearts from apoptosis.
    1. Evolutionary Biology

    Decreased recent adaptation at human mendelian disease genes as a possible consequence of interference between advantageous and deleterious variants

    Chenlu Di et al.
    Harmful genetic variants at mendelian disease genes slow down adaptation, by interfering with the spread of adaptive variants in a population.

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