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Hyperandrogenism in POMCa-deficient zebrafish enhances somatic growth without increasing adiposity 被引量:3
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作者 Chuang Shi Yao Lu +9 位作者 Gang Zhai Jianfei Huang Guohui Shang Qiyong Lou Dongliang Li Xia Jin Jiangyan He Zhenyu Du Jianfang Gui Zhan Yin 《Journal of Molecular Cell Biology》 SCIE CAS CSCD 2020年第4期291-304,共14页
The endocrine regulatory roles of the hypothalamic-pituitary-adrenocortical axis on anxiety-like behavior and metabolic status have been found throughout animal taxa.However,the precise effects of the balancing adrena... The endocrine regulatory roles of the hypothalamic-pituitary-adrenocortical axis on anxiety-like behavior and metabolic status have been found throughout animal taxa.However,the precise effects of the balancing adrenal corticosteroid biosynthesis under the influence of adrenocorticotrophic hormone(ACTH),a pro-opiomelanocortin(POMC)-derived peptide,on animal energy expenditure and somatic growth remain unknown.POMC has also been identified as one of the candidate loci for polycystic ovary syndrome,which features hyperandrogenism and some prevalence of obesity in patients.Here we show that zebrafish lacking functional POMCa exhibit similar phenotypes of stress response and body weight gain but not obesity as observed in mammalian models.In contrast with the impaired anorexigenic signaling cascade of melanocyte-stimulating hormones and leptin,which are responsible for their obesity-prone weight gain observed in various pome mutant mammals,analyses with our pomca mutant series indicate that ACTH is the key regulator for the phenotype with enhanced somatic growth without obesity in pomca-deficient zebrafish.Hypocortisolism associated with hyperandrogenism has been observed in the pomca-deficient zebrafish,with enhanced activation of mammalian target of rapamycin complex 1;reutilization of amino acids and fatty acid^-oxidation are observed in the muscle tissue of the pomca-deficient fish.After reducing hyperandrogenism by crossing our pomca mutant fish with a cy p l 7a 1-deficient background,the phenotype of enhanced somatic growth in pomca-deficient fish was no longer observed.Thus,our work also demonstrated that the role of POMCa in stress response seems to be conserved in vertebrates,whereas its effect on adipostasis is unique to teleosts. 展开更多
关键词 anabolic metabolism HPI axis pomca somatic growth stress response
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