What is the role of genetics in the pathophysiology of hypogonadism?

Updated: Apr 03, 2019
  • Author: Maria G Vogiatzi, MD; Chief Editor: George T Griffing, MD  more...
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Answer

Normosmic hypogonadotropic hypogonadism, in which the sense of smell is not disrupted, has been associated with mutations in GNRH1, KISS1R, and GNRHR genes. Although their exact functions are unclear, the genes TAC3 and TACR3 have also been associated with normosmic hypogonadotropic hypogonadism. Kallmann syndrome (anosmic hypogonadotropic hypogonadism) has been associated with mutations in KAL1, FGFR1, FGF8, PROK2, and PROKR2 genes. The relationship with Kallmann syndrome is thought to be because these genes are all related to the development and migration of GnRH neurons. Mutations of an additional gene, CHD7, which has been associated with CHARGE syndrome, has also been found in patients with normosmic or anosmic hypogonadotropic hypogonadism.


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