ACTH (11-24) is a fragment of adrenocorticotrophin, acts as an antagonist of adrenocorticotropic hormone (ACTH) receptor, and induces cortisol release.
ACTH (11-24) acts as an antagonist of adrenocorticotropic hormone receptor[1]. ACTH (11-24) induces cortisol secretion submaximally in freshly dispersed or cultured beef adrenal cortical cells. The maximal cortisol release by ACTH (11-24) is enhanced by forskolin but inhibited by calcium channel blockers[2].
ACTH (11-24) blocks electroacupuncture (EA) anti-edema but not EA anti-hyperalgesia in rats[1].
[1]. Li ZG, et al. Adrenocorticotropin(1-10) and -(11-24) promote adrenal steroidogenesis by different mechanisms. Endocrinology. 1989 Aug;125(2):592-6. [2]. Li A, et al. Electroacupuncture activates corticotrophin-releasing hormone-containing neurons in the paraventricular nucleus of the hypothalammus to alleviate edema in a rat model of inflammation. BMC Complement Altern Med. 2008 May 12;8:20.