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  • Sirt1-deficient mice have hypogonadotropic hypogonadism due to defective GnRH neuronal migration.

Sirt1-deficient mice have hypogonadotropic hypogonadism due to defective GnRH neuronal migration.

Molecular endocrinology (Baltimore, Md.) (2014-12-30)
Gabriele Di Sante, Liping Wang, Chenguang Wang, Xuanmiao Jiao, Mathew C Casimiro, Ke Chen, Timothy G Pestell, Ismail Yaman, Agnese Di Rocco, Xin Sun, Yoshiyuki Horio, Michael J Powell, Xiaohong He, Michael W McBurney, Richard G Pestell
ABSTRACT

Hypogonadatropic hypogonadism (HH) can be acquired through energy restriction or may be inherited as congenital hypogonadotropic hypogonadism and its anosmia-associated form, Kallmann's syndrome. Congenital hypogonadotropic hypogonadism is associated with mutations in a group of genes that impact fibroblast growth factor 8 (FGF8) function. The Sirt1 gene encodes a nicotinamide adenine dinucleotide-dependent histone deacetylase that links intracellular metabolic stress to gene expression. Herein Sirt1(-/-) mice are shown to have HH due to failed GnRH neuronal migration. Sirtuin-1 (Sirt1) catalytic function induces GnRH neuronal migration via binding and deacetylating cortactin. Sirt1 colocalized with cortactin in GnRH neurons in vitro. Sirt1 colocalization with cortactin was regulated in an FGF8/fibroblast growth factor receptor-1 dependent manner. The profound effect of Sirt1 on the hormonal status of Sirt1(-/-) mice, mediated via defective GnRH neuronal migration, links energy metabolism directly to the hypogonadal state. Sirt1-cortactin may serve as the distal transducer of neuronal migration mediated by the FGF8 synexpression group of genes that govern HH.

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