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** In males, LH stimulates the leydig cells in the testes which produce testosterone by converting the cholesterol to testosterone. | ** In males, LH stimulates the leydig cells in the testes which produce testosterone by converting the cholesterol to testosterone. | ||
** Production of testosterone from the testes gives negative feed back to the pituitary. This feedback inhibit the production of FSH and LH from the pituitary. | ** Production of testosterone from the testes gives negative feed back to the pituitary. This feedback inhibit the production of FSH and LH from the pituitary. | ||
* | * Testosterone deficiency can occur when different acquired or congenital disease affect the organs responsible for its secretion. So, pathogenesis of the hypogonadism in males depends on the underlying cause. | ||
* GnRH deficiency has a main role in hypogonadism pathogenesis in males as it leads to decrease of the gonadal hormone and deficiency of testosterone eventually.<ref name="pmid3098771">{{cite journal| author=Spratt DI, Carr DB, Merriam GR, Scully RE, Rao PN, Crowley WF| title=The spectrum of abnormal patterns of gonadotropin-releasing hormone secretion in men with idiopathic hypogonadotropic hypogonadism: clinical and laboratory correlations. | journal=J Clin Endocrinol Metab | year= 1987 | volume= 64 | issue= 2 | pages= 283-91 | pmid=3098771 | doi=10.1210/jcem-64-2-283 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=3098771 }}</ref> | |||
* It has been proved that GnRH deficiency is associated with most cases of idiopathic hypogonadotrophic hypogonadism in males. | |||
== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
{{WH}} | {{WH}} | ||
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Pathophysiology
Pathogenesis
Hypogonadism in males
- The hypogonadism pathogenesis in males depends mainly on the testosterone deficiency. Testosterone secretion occurs as the following:
- Testosterone is secreted in response to stimulation signals from the brain cortex to the hypothalamus. The hypothalamus by its role secrets the gonadotropin releasing hormones (GnRH).
- GnRH stimulates the pituitary gland which by its role secretes the gonadal hormones the Follicle Stimulating Hormone (FSH) and the Luteinizing Hormone (LH).
- In males, LH stimulates the leydig cells in the testes which produce testosterone by converting the cholesterol to testosterone.
- Production of testosterone from the testes gives negative feed back to the pituitary. This feedback inhibit the production of FSH and LH from the pituitary.
- Testosterone deficiency can occur when different acquired or congenital disease affect the organs responsible for its secretion. So, pathogenesis of the hypogonadism in males depends on the underlying cause.
- GnRH deficiency has a main role in hypogonadism pathogenesis in males as it leads to decrease of the gonadal hormone and deficiency of testosterone eventually.[1]
- It has been proved that GnRH deficiency is associated with most cases of idiopathic hypogonadotrophic hypogonadism in males.
References
- ↑ Spratt DI, Carr DB, Merriam GR, Scully RE, Rao PN, Crowley WF (1987). "The spectrum of abnormal patterns of gonadotropin-releasing hormone secretion in men with idiopathic hypogonadotropic hypogonadism: clinical and laboratory correlations". J Clin Endocrinol Metab. 64 (2): 283–91. doi:10.1210/jcem-64-2-283. PMID 3098771.