Loperamide, an opiate analog, differently modifies the adrenocorticotropin responses to corticotropin-releasing hormone and lysine vasopressin in patients with Addison's disease.
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Bochicchio D, Ambrosi B, Faglia G
Loperamide, an opiate analog, differently modifies the adrenocorticotropin responses to corticotropin-releasing hormone and lysine vasopressin in patients with Addison's disease.
Neuroendocrinology. 1988 Dec;48(6):611-4.
- PubMed ID
- 2855105 [ View in PubMed]
- Abstract
Loperamide is a peripheral opiate agonist able to inhibit ACTH secretion. In this work, the interactions between loperamide and two ACTH secretagogues, lysine vasopressin (LVP) and corticotropin-releasing hormone (CRH), were investigated in patients with Addison's disease. After loperamide (16 mg orally) or placebo administration, 5 patients received LVP (0.06 IU/kg i.v. over 1 h) and 6 patients received oCRH (1 micrograms/kg i.v. as bolus). In all patients loperamide induced a significant fall in plasma ACTH levels. LVP increased ACTH levels after both loperamide (from 48 +/- 17.3 to a peak of 95 +/- 21 pmol/l) and placebo (from 231 +/- 59.5 to 365 +/- 86.6 pmol/l): the interaction between treatments and time was not significant. CRH caused a rise in plasma ACTH after both loperamide (from 30 +/- 16.6 to a peak of 108 +/- 31 pmol/l) and placebo (from 98.5 +/- 47 to 211 +/- 61.7 pmol/l): the interaction between treatments and time was significant, and the first phase of CRH-induced ACTH secretion was significantly lower after loperamide. These data demonstrate that loperamide differently modifies the stimulatory action of LVP and CRH on ACTH secretion: namely, LVP and loperamide act in an additive manner, while CRH and loperamide interact in a non additive way. Although these findings might be explained by the involvement of different intracellular ACTH-secreting mechanisms, an influence of loperamide on some suprapituitary factors modulating the ACTH response is suggested.
DrugBank Data that Cites this Article
- Drug Targets
Drug Target Kind Organism Pharmacological Action Actions Loperamide Pro-opiomelanocortin Protein Humans UnknownModulatorDetails