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- W2107201710 abstract "Energy homeostasis and fuel metabolism undergo significant modifications in the course of ageing. During the second half of life many humans increase their body mass and develop glucose intolerance that may lead to obesity and type 2 diabetes. However, many old people suffer from being underweight, and this anorexia of elderly may seriously compromise their health under certain circumstances. Experimental studies into the causes of ageing-related impairments of food intake regulation were performed mainly on rat, and to some extent, on non-human primates. It was found that the expression of NPY, the most potent orexigenic peptide, and of NPY receptors, is highly suppressed in the hypothalamus of old rats. Moreover, the increase of NPY mRNA after fasting was severely blunted in old as compared to young rats. Similar reductions, although of lower magnitude, were reported for other hypothalamic orexigenic compounds such as, AgRP and orexins. Interestingly, ageing does not significantly alter hypothalamic mRNA levels of important anorexigens such as CART and aMSH. The presented findings suggest that, at least in rodents, ageing is associated with the general down-regulation of hypothalamic peptides that stimulate food intake and unchanged expression of anorexigenic peptides. This situation may be responsible for the decreased appetite drive in senescent animals and loss of weight at the end-of-life period. If similar changes of the central control of food intake underly anorexia of ageing observed in some elderly, it is possible that therapeutic intervention at this regulatory level may be possible in the future." @default.
- W2107201710 created "2016-06-24" @default.
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- W2107201710 date "2006-11-01" @default.
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- W2107201710 title "Central regulation of food intake in ageing." @default.
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