112 results found
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Evolutionary stability of collateral sensitivity to antibiotics in the model pathogen Pseudomonas aeruginosa

    Camilo Barbosa et al.
    Evolutionary trade-offs enhance efficacy of antibiotic therapy by constraining bacterial adaptation in dependence of drug order and trade-off effect size.
    1. Neuroscience

    Constitutive activation of kappa opioid receptors at ventral tegmental area inhibitory synapses following acute stress

    Abigail M Polter et al.
    Rats exposed to a single stressful event experience days-long constitutive activation of the kappa opioid receptor at inhibitory synapses in part of the brain’s reward system, which increases their drug-seeking behavior.
    1. Neuroscience

    A subset of ipRGCs regulates both maturation of the circadian clock and segregation of retinogeniculate projections in mice

    Kylie S Chew et al.
    A single subpopulation of photoreceptors constitutes a shared node in the neural networks that regulate light-dependent maturation of the circadian clock and light-independent refinement of retinal ganglion cell projections to the brain.
    1. Cell Biology
    2. Neuroscience

    Speed and segmentation control mechanisms characterized in rhythmically-active circuits created from spinal neurons produced from genetically-tagged embryonic stem cells

    Matthew J Sternfeld et al.
    Stem cell derived ventral-spinal cord excitatory neurons self-assemble into a rhythmically bursting neural network whose speed and intercellular coordination are both instructively modulated by cell-type specific interactions with inhibitory neurons.
    1. Evolutionary Biology
    2. Microbiology and Infectious Disease

    Ribosomal mutations promote the evolution of antibiotic resistance in a multidrug environment

    James E Gomez et al.
    Mutations in several components of a bacterial ribosome are shown to broadly decrease antibiotic and stress sensitivity, and readily accessible reversion mutations allow these ribosomal mutations to serve as stepping stones to high level antibiotic resistance.
    1. Computational and Systems Biology
    2. Neuroscience

    Interneuronal mechanisms of hippocampal theta oscillations in a full-scale model of the rodent CA1 circuit

    Marianne J Bezaire et al.
    Spontaneous theta oscillations and interneuron-specific phase preferences emerge spontaneously in a full-scale model of the isolated hippocampal CA1 subfield, corroborating and extending recent experimental findings.
    1. Neuroscience

    CCR5 is a suppressor for cortical plasticity and hippocampal learning and memory

    Miou Zhou et al.
    Repression of the G protein-coupled chemokine receptor CCR5 enhances MAPK/CREB signaling, long-term potentiation, somatosensory cortical plasticity, and learning and memory, while CCR5 over-activation by viral proteins may contribute to HIV-associated cognitive deficits.
    1. Cancer Biology
    2. Computational and Systems Biology

    A curative combination cancer therapy achieves high fractional cell killing through low cross-resistance and drug additivity

    Adam C Palmer et al.
    Drugs in a curative chemotherapy regimen are independently effective and resisted by different mechanisms, so cancer cells have little chance of surviving all drugs, and this benefit occurs without synergistic interactions.
    1. Neuroscience

    Dendritic NMDA receptors in parvalbumin neurons enable strong and stable neuronal assemblies

    Jonathan H Cornford et al.
    NMDA receptors on PV+ interneurons mediate supralinear integration at feedback synapses from local pyramidal neurons, enabling competing networks to ‘lock’ onto salient inputs.
    1. Neuroscience

    Synapse-specific opioid modulation of thalamo-cortico-striatal circuits

    William T Birdsong et al.
    By differentially modulating the two major excitatory inputs to the striatum, mu- and delta-opioid receptors regulate the balance between thalamic and cortical inputs to the striatum.

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