33 results found
  1. December 2015

    Episode 26: December 2015

    In this episode we hear about heat-seeking behaviour in mosquitos, mass spawning in coral reefs, social organization in ants, fear in rats and tissue regeneration in newts.
    1. Neuroscience

    Homeostatic reinforcement learning for integrating reward collection and physiological stability

    Mehdi Keramati, Boris Gutkin
    A mathematical model built around the assumption that the desire to maintain internal homeostasis drives the behavior of animals, by affecting their learning processes, can explain many real-world behaviors, including some that might otherwise appear irrational.
    1. Ecology
    2. Evolutionary Biology
    Killifish illustration

    The Natural History of Model Organisms: Nothobranchius furzeri, an 'instant' fish from an ephemeral habitat

    Martin Reichard, Matej Polačik
    The turquoise killifish from ephemeral pools in African savannah combines extremely short lifespan with a standard vertebrate body plan – ideal attributes for a laboratory animal.
    1. Neuroscience

    Thermoregulation: How a brain keeps its cool

    Swathi Yadlapalli, Orie T Shafer
    Temperature-sensing neurons in the Drosophila brain cooperate with the central circadian clock to help regulate body temperature.
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    1. Structural Biology and Molecular Biophysics

    The ion selectivity filter is not an activation gate in TRPV1-3 channels

    Andrés Jara-Oseguera et al.
    The TRPV1, TRPV2 and TRPV3 channels are gated on the cytosolic side of the pore, whereas structural changes in the ion selectivity filter associated with activation don't control cation access.
    1. Neuroscience

    Defined neuronal populations drive fatal phenotype in a mouse model of Leigh syndrome

    Irene Bolea et al.
    Glutamatergic brainstem neurons drive motor and respiratory deficits, and GABAergic basal ganglia neurons cause hypothermia and fatal epileptic events, in a model of mitochondrial disease.
    1. Ecology

    Ant colonies maintain social homeostasis in the face of decreased density

    Andreas P Modlmeier et al.
    Organizational resilience allows ant colonies to retain high interaction rates in the face of decreased density by altering their spatial and social dynamics.
    1. Neuroscience

    Arcuate nucleus and lateral hypothalamic CART neurons in the mouse brain exert opposing effects on energy expenditure

    Aitak Farzi et al.
    CART exerts differential metabolic effects in response to activation of neurons of the Arc, where CART suppresses energy expenditure, while it enforces the reward characteristics of the LHA.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Structural basis of malodour precursor transport in the human axilla

    Gurdeep S Minhas et al.
    Discovery of the structural basis for recognition and uptake of a human precursor for body odour production reveals an important role for bacterial peptide transport and novel routes to prevent its production in humans.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Immune genes are hotspots of shared positive selection across birds and mammals

    Allison J Shultz, Timothy B Sackton
    Pathogens, particularly viruses, target the same genes over deep evolutionary time, resulting in shared signatures of positive selection and transcriptional responses at the same genes.

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