298 results found
    1. Developmental Biology
    2. Neuroscience

    Regulation of nerve growth and patterning by cell surface protein disulphide isomerase

    Geoffrey MW Cook et al.
    The nerve growth-repellent activity that generates spinal nerve repeat-patterning in birds and mammals is identified at the molecular level, and a similar system is revealed in adult brain grey matter.
    1. Developmental Biology

    An abundant quiescent stem cell population in Drosophila Malpighian tubules protects principal cells from kidney stones

    Chenhui Wang, Allan C Spradling
    Drosophila renal stem cells are exceptional in abundance, require induction to produce a single cell type, principal cells, and mitigate damage during adulthood associated with external stresses.
    1. Evolutionary Biology
    2. Genetics and Genomics

    Recurrent loss of HMGCS2 shows that ketogenesis is not essential for the evolution of large mammalian brains

    David Jebb, Michael Hiller
    The evolutionary loss of the main enzyme required for ketone body biosynthesis suggests that alternative strategies to provide energy for large brains during fasting evolved repeatedly in mammals.
    1. Ecology
    2. Evolutionary Biology

    Molecular basis of wax-based color change and UV reflection in dragonflies

    Ryo Futahashi et al.
    UV-reflective dragonfly wax is shown to consist of very long-chain methyl ketones and aldehydes, and a synthetic dragonfly wax spontaneously forms light-scattering fine structures with strong UV reflection.
    1. Developmental Biology

    Glucocorticoid receptor-PPARα axis in fetal mouse liver prepares neonates for milk lipid catabolism

    Gianpaolo Rando et al.
    Glucocorticoid receptor directly regulates the transcriptional activity of peroxisome proliferator-activated alpha (PPARα) before birth in anticipation of the sudden shifts in the postnatal nutrient source and metabolic demands.
    1. Neuroscience

    Long-term implicit memory for sequential auditory patterns in humans

    Roberta Bianco et al.
    Human listeners rapidly form robust, long lasting (up to 7 weeks) memories of rarely encountered, featureless sound sequences presented among many similar stimuli.
    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. Cell Biology

    Exercise promotes the expression of brain derived neurotrophic factor (BDNF) through the action of the ketone body β-hydroxybutyrate

    Sama F Sleiman et al.
    A potential link between metabolic changes resulting from exercise and gene expression in the brain has been revealed.
    1. Neuroscience

    Dyslexics’ faster decay of implicit memory for sounds and words is manifested in their shorter neural adaptation

    Sagi Jaffe-Dax et al.
    Implicit memory traces for recently encountered perceptual stimuli, including words, decay more quickly in people with dyslexia.
    1. Neuroscience

    Stimulus salience determines defensive behaviors elicited by aversively conditioned serial compound auditory stimuli

    Sarah Hersman et al.
    Perceived imminence of threat and resulting intensity of defensive responses during serial compound stimulus conditioning are determined by auditory stimulus salience, not cue sequence as recently reported.

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