493 results found
    1. Biochemistry and Chemical Biology
    2. Physics of Living Systems

    Hsp70 chaperones are non-equilibrium machines that achieve ultra-affinity by energy consumption

    Paolo De Los Rios, Alessandro Barducci
    ATP consumption enables chaperones to exploit the different kinetic properties of their conformational states to exhibit a non-equilibrium affinity for their substrates that is orders of magnitude higher than its equilibrium value.
    1. Ecology

    First bone-cracking dog coprolites provide new insight into bone consumption in Borophagus and their unique ecological niche

    Xiaoming Wang et al.
    Fossilized feces (coprolites) of extinct bone-crushing dogs, Borophagus parvus, from late Miocene (6 million years ago) of California demonstrates consumption and preservation of bones in digestive tracts and potential social hunting behavior by these predators.
    1. Neuroscience

    Chemogenetic inhibition of the medial prefrontal cortex reverses the effects of REM sleep loss on sucrose consumption

    Kristopher McEown et al.
    Loss of REM sleep increases sucrose and fat consumption in mice; and inhibiting the prefrontal cortex reverses the increased consumption of sucrose, but not fat, following REM sleep loss.
    1. Chromosomes and Gene Expression
    2. Neuroscience

    A receptor and neuron that activate a circuit limiting sucrose consumption

    Ryan M Joseph et al.
    Although sugar-sensing taste neurons typically promote feeding, a taste neuron in the Drosophila pharynx limits feeding via the IR60b receptor; thus, revealing a new element in the circuit logic of feeding control.
    1. Human Biology and Medicine
    2. Neuroscience

    Point of View: Predictive regulation and human design

    Peter Sterling
    Why does the human regulatory system, which evolution tuned for small satisfactions, now constantly demand 'more'?
    1. Cell Biology
    2. Neuroscience

    Excitatory transmission onto AgRP neurons is regulated by cJun NH2-terminal kinase 3 in response to metabolic stress

    Santiago Vernia et al.
    Metabolic stress-induced activation of the JNK3 protein regulates excitatory transmission onto AgRP neurons to regulate food consumption.
    1. Neuroscience

    NMNAT1 inhibits axon degeneration via blockade of SARM1-mediated NAD+ depletion

    Yo Sasaki et al.
    Axonal metabolic flux analysis demonstrates that expression of NMNAT1 blocks axonal degeneration in cultured mouse neurons not by altering NAD+ synthesis, but rather by inhibiting injury-induced, SARM1-dependent NAD+ consumption.
    1. Neuroscience

    Endogenous opioids in the nucleus accumbens promote approach to high-fat food in the absence of caloric need

    Kevin Caref, Saleem M Nicola
    Activation of mu-opioid receptors in the nucleus accumbens by their endogenous ligands promotes consumption of high-fat food in sated but not hungry rats, via enhancement of a neural signal that promotes cued approach behavior.
    1. Neuroscience

    Axons: The cost of communication in the brain

    Brian A MacVicar et al.
    Imaging ATP in axons reveals that they rely on glucose from the blood and lactate produced by glial cells as sources of energy.
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    1. Human Biology and Medicine
    2. Neuroscience

    Obesity: The emerging neurobiology of calorie addiction

    Cristina García-Cáceres, Matthias H Tschöp
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