Effects of four orally administered analogues of prostaglandin E1 and E2 on glucose tolerance and on the secretion of pancreatic and gastrointestinal hormones in man

European Journal of Clinical Investigation
M NauckW Creutzfeldt

Abstract

Oral glucose tolerance tests (75 g, 300 ml) were performed in 12 healthy volunteers, with prior administration of placebo, misoprostol (400 micrograms), rioprostil (300 micrograms), enprostil (70 micrograms), or nocloprost (200 micrograms), in a double-blind, randomized manner. None of the drugs significantly affected glucose tolerance, although with misoprostal some volunteers displayed an impaired glucose tolerance. Nocloprost was without effect on gastric inhibitory polypeptide (GIP) and did not influence insulin or C-peptide concentrations. Misoprostol and rioprostil reduced integrated incremental responses of GIP by 57% (P less than or equal to 0.001) and 45% (P less than or equal to 0.01), respectively, and both gave rise to an initial (approximately 10 min) delay of insulin and C-peptide responses, without a significant overall reduction in integrated incremental responses. Enprostil almost totally inhibited the GIP response (by 94%; P less than or equal to 0.001), delayed initial insulin and C-peptide responses, but reduced the integrated incremental C-peptide response (which corresponds to the overall release of insulin) by only 14% (P less than or equal to 0.05). Enprostil more substantially reduced the integrated inc...Continue Reading

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