Title : Ghrelin is produced by and directly activates corticotrope cells from adrenocorticotropin-secreting adenomas.

Pub. Date : 2006 Jun

PMID : 16551736






4 Functional Relationships(s)
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1 Interestingly, in Cushing"s disease, ghrelin markedly increases plasma ACTH, whereas its stimulatory action on GH secretion is reduced. Ghrelin proopiomelanocortin Homo sapiens
2 Although the reported expression of ghrelin receptors (GHS-R) in corticotrope tumors offers a potential mechanism for ghrelin-induced ACTH hypersecretion, studies on the direct effects of synthetic GH secretagogues on corticotropinoma cells offered contradictory results. Ghrelin proopiomelanocortin Homo sapiens
3 Importantly, double immunogold electron microscopy revealed that ghrelin is costored within ACTH secretory vesicles in densely granulated adenomatous corticotropes. Ghrelin proopiomelanocortin Homo sapiens
4 Our findings provide a plausible cellular basis for the exaggerated ACTH response to ghrelin in Cushing"s disease and suggest novel research strategies to develop medical treatments for this disease. Ghrelin proopiomelanocortin Homo sapiens