Abstract
Tumour-bearing mice spontaneously lose weight 8–9 weeks after implantation of a human hypernephroma, in spite of a normal food intake. Resting oxygen consumption was up to 40% higher in these animals than in sham-operated controls, but was significantly reduced by 8-adrenergic blockade with propranolol in the former group. The injection of noradrenaline caused a marked stimulation of the metabolic rate in all the animals, but the greatest response was seen in the cachectic mice. The brown-adipose-tissue mass was similar for both groups, but guanosine diphosphate binding to brownadipose-tissue mitochondria (an index of thermogenic capacity) was significantly increased in turnout-bearing mice, and the injection of noradrenaline 1 h prior to sacrifice caused the greatest stimulation of binding in the cachectic group. These data suggest that the rapid weight loss of tumour-bearing animals may be due to a high metabolic rate which results from sympathetic stimulation of brown-adipose-tissue metabolism. The relevance of these results to cancer-induced cachexia in man is discussed.
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Brooks, S.L., Neville, A.M., Rothwell, N.J. et al. Sympathetic activation of brown-adipose-tissue thermogenesis in cachexia. Biosci Rep 1, 509–517 (1981). https://doi.org/10.1007/BF01121584
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DOI: https://doi.org/10.1007/BF01121584