491 results found
  1. October 2014

    Episode 15: October 2014

    In this episode we hear about influenza pandemics, eating too much, cannabis and the brain, HIV cure research, and the evolution of sea squirts.
    1. Ecology
    2. Evolutionary Biology
    The Natural History of Model Organisms

    The Natural History of Model Organisms

    Edited by Ian Baldwin et al.
    Essays on the wild lives of model organisms, from Arabidopsis to the zebrafish.
    1. Developmental Biology
    2. Stem Cells and Regenerative Medicine

    Cellular localization of the cell cycle inhibitor Cdkn1c controls growth arrest of adult skeletal muscle stem cells

    Despoina Mademtzoglou et al.
    Ablation of the Cdkn1c cell cycle inhibitor leads to defective muscle stem cell dynamics and myogenic potential, while progressive cytoplasmic to nuclear cellular localization of the Cdkn1c protein regulates growth arrest.
    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. Developmental Biology

    Stella modulates transcriptional and endogenous retrovirus programs during maternal-to-zygotic transition

    Yun Huang et al.
    Soon after fertilisation, a critical portion of the embryonic genome is switched on through the actions of maternally inherited Stella, in part through controlling the activation of transposable elements.
    1. Neuroscience

    Coordinated control of terminal differentiation and restriction of cellular plasticity

    Tulsi Patel, Oliver Hobert
    Transcription factors that specify the identity of individual neuron types via activating terminal differentiation gene batteries also restrict cellular plasticity via altering the chromatin landscape.
    1. Chromosomes and Gene Expression

    Aurora-A mediated histone H3 phosphorylation of threonine 118 controls condensin I and cohesin occupancy in mitosis

    Candice L Wike et al.
    A histone modification that alters the nucleosome structure occurs in mitosis and promotes chromosome packaging and the timely removal of condensin I and cohesion, to achieve chromosome segregation.
    1. Developmental Biology

    Calcium handling precedes cardiac differentiation to initiate the first heartbeat

    Richard CV Tyser et al.
    High-resolution live imaging reveals how and when the mouse heart first starts to beat during development and how the onset of beating impacts on heart muscle cell maturation and heart formation.
    1. Stem Cells and Regenerative Medicine

    Embryonic attenuated Wnt/β-catenin signaling defines niche location and long-term stem cell fate in hair follicle

    Zijian Xu et al.
    Long-term hair follicle stem cells arise by embryonic progenitor cells occupying a niche location that is defined by attenuated Wnt/β-catenin signal.
    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.

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