[From gene to disease; leptin and obesity].

Abstract excerpt

Homozygous mutations of the ob gene, encoding leptin, are associated with severe obesity, hyperphagia and insulin resistance in humans. Leptin conveys a signal from adipose tissue to hypothalamic nuclei that integrate whole body fuel metabolism, informing those nuclei about the magnitude of fuel reserves. In the absence of leptin, the brain perceives energy availability as insufficient and therefore activates...

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