579 results found
  1. August 2015

    Episode 22: August 2015

    In this episode we hear about cancer, dengue fever, sperm DNA and neurons that are sensitive to magnetic fields.
    1. Chromosomes and Gene Expression

    Nonsense mRNA suppression via nonstop decay

    Joshua A Arribere, Andrew Z Fire
    Nonstop mRNA decay degrades mRNAs with a premature stop codon after such mRNAs are targeted by the nonsense-mediated decay machinery.
    1. Genetics and Genomics

    Firefly genomes illuminate parallel origins of bioluminescence in beetles

    Timothy R Fallon et al.
    The first genomic view of beetle luciferase evolution indicates evolutionary independence of luciferase between fireflies and click-beetles, and provide valuable datasets which will accelerate the discovery of new biotechnological tools.
    1. Computational and Systems Biology
    2. Developmental Biology

    Elastic force restricts growth of the murine utricle

    Ksenia Gnedeva et al.
    Computational modeling and molecular-biological analysis reveal the role of mechanical force and downstream Yap signaling in growth control during the development and regeneration of sensory epithelium of the inner ear.
    1. Cell Biology

    Cell cycle entry triggers a switch between two modes of Cdc42 activation during yeast polarization

    Kristen Witte et al.
    Optogenetic control of Cdc42 activation during polarization of budding yeast demonstrates a cell cycle regulated switch between two distinct modes of positive feedback.
    1. Developmental Biology
    2. Evolutionary Biology

    Domestic chickens activate a piRNA defense against avian leukosis virus

    Yu Huining Sun et al.
    To protect the germ line genome, chickens acquire new small RNA-based immune defense in response to recently endogenized retroviruses by turning a truncated provirus into a weapon.
    1. Ecology

    Acknowledging selection at sub-organismal levels resolves controversy on pro-cooperation mechanisms

    Wenying Shou
    Building on previous work (Momeni et al., 2013), it is shown that recognizing the hierarchical organization of biological systems resolves the ongoing controversy on pro-cooperation mechanisms.
    1. Cell Biology
    2. Computational and Systems Biology

    A positive-feedback-based mechanism for constriction rate acceleration during cytokinesis in Caenorhabditis elegans

    Renat N Khaliullin et al.
    Positive feedback between contractile ring myosin and compression-driven cortical flow can explain the exponential accumulation of contractile ring components and constriction rate acceleration that ensures timely cell separation during cytokinesis.
    1. Neuroscience

    Acute inhibition of neurosteroid estrogen synthesis suppresses status epilepticus in an animal model

    Satoru M Sato, Catherine S Woolley
    Seizures stimulate estrogen synthesis in the brain and acutely inhibiting brain estrogen synthesis suppresses seizures, in both sexes, without additional interventions.
    1. Microbiology and Infectious Disease
    2. Neuroscience

    The sheddase ADAM10 is a potent modulator of prion disease

    Hermann C Altmeppen et al.
    A lack of ADAM10-mediated shedding increases prion protein levels at the plasma membrane and promotes the generation of pathological prion proteins, which accelerates prion disease in mice.

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