An illustration showing a scale weighing two double-stranded pieces of DNA that has a big question mark in the center.
Mouse Foraging Behavior Shaped by Opposite-Sex Parent’s Genes
A study in mice finds that for certain genes, one parent’s allele can dominate expression and shape behavior—and which parent’s allele does so varies throughout the body.
ABOVE: © ISTOCK.COM, BSD555
Mouse Foraging Behavior Shaped by Opposite-Sex Parent’s Genes
Mouse Foraging Behavior Shaped by Opposite-Sex Parent’s Genes

A study in mice finds that for certain genes, one parent’s allele can dominate expression and shape behavior—and which parent’s allele does so varies throughout the body.

A study in mice finds that for certain genes, one parent’s allele can dominate expression and shape behavior—and which parent’s allele does so varies throughout the body.

ABOVE: © ISTOCK.COM, BSD555
hypothalamus
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Two independent teams identify neuron populations in the mouse brain that regulate the physiological changes associated with torpor.
a mouse on an exercise wheel
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Altering DNA methylation in a particular area of the hypothalamus halved the animals’ voluntary exercise as adults.
Exercise Warms the Brain, Causing Mice to Eat Less
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Directly activating a heat sensor also sensitive to capsaicin in chili peppers in the hypothalamus had the same effect as exercise.
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Once implanted into animals’ brains, neural stem cells that secrete microRNA-containing vesicles seem to contribute to an anti-aging effect.
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Once it’s cleaved, the protein precursor pro-opiomelanocortin (POMC) gives rise to hormones involved in appetite, arousal, pleasure, and more.
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Inducing activity in the zona incerta region of the brain prompts mice to gorge themselves.
Another Obesity Drug Trial Death
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A second patient taking an experimental medication to treat Prader-Willi Syndrome has died of blood clots.
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Cannabinoids cause appetite-suppressing neurons to produce an appetite-stimulating hormone in mice.
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A network of neurons in the hypothalamus can turn feeding behavior on or off with the flip of an optogenetic switch in mice.  
Light on the Brain
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Researchers find that photoreceptors expressed in zebrafish hypothalamus contribute to light-dependent behavior.
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Hormones in the brain control sex-specific behaviors by activating individual genetic programs.