16 results found
  1. Episode 46: March 2018

    In this episode we hear about autism, insulin resistance, Sci-Hub, coping with low levels of oxygen, and how the brain responds to blindness.
    1. Evolutionary Biology

    The last common ancestor of animals lacked the HIF pathway and respired in low-oxygen environments

    Daniel B Mills et al.
    Sponges and ctenophores lack hypoxia-inducible factors, suggesting that the metazoan last common ancestor could have lived aerobically under severe hypoxia and did not need to regulate its transcription in response to oxygen availability.
    1. Evolutionary Biology

    Evolution: Oxygen and early animals

    Kalle T Rytkönen
    The biology of sponges provides clues about how early animals may have dealt with low levels of oxygen.
    Insight
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    1. Genetics and Genomics
    2. Neuroscience

    Co-expression of xenopsin and rhabdomeric opsin in photoreceptors bearing microvilli and cilia

    Oliver Vöcking et al.
    The recently characterized opsin group of xenopsins is likely a major player in animal eye evolution and may have been present in an ancient, highly plastic eye photoreceptor cell type.
    1. Genetics and Genomics
    2. Neuroscience

    Evolution: The enigmatic xenopsins

    Detlev Arendt
    A new member of the family of light-sensitive proteins called opsins has stirred up our view of photoreceptors.
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    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Dynamics of genomic innovation in the unicellular ancestry of animals

    Xavier Grau-Bové et al.
    The foundations of genomic complexity in multicellular animals have deep roots in their unicellular prehistory, both in terms of innovations in gene content, as well as the evolutionary dynamics of genome architecture.
    1. Neuroscience

    Ciliomotor circuitry underlying whole-body coordination of ciliary activity in the Platynereis larva

    Csaba Verasztó et al.
    Connectomic reconstruction combined with activity imaging uncovered a rhythmically active neuronal circuit for the coordination of ciliary activity across the whole body of a marine larva.
    1. Developmental Biology and Stem Cells
    2. Evolutionary Biology

    Collagen IV and basement membrane at the evolutionary dawn of metazoan tissues

    Aaron L Fidler et al.
    Collagen IV is a primordial extracellular matrix component associated with the transition to animal multicellularity, and enabled the formation and evolution of epithelial tissues.
    1. Developmental Biology and Stem Cells
    2. Evolutionary Biology

    The evolutionary origin of bilaterian smooth and striated myocytes

    Thibaut Brunet et al.
    Molecular profiling of annelid myocytes reveals that the last common protostome-deuterostome ancestor already possessed a dual musculature, with visceral smooth muscles ensuring digestion and somatic striated muscles ensuring locomotion.
    1. Physics of Living Systems

    Aerotaxis in the closest relatives of animals

    Julius B Kirkegaard et al.
    The colony-forming choanoflagellate Salpingoeca rosetta is capable of moving towards oxygen using logarithmic sensing of oxygen concentrations and a navigation strategy that involves random movements.

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