Stimulative effect of substance P on insulin secretion from isolated rat islets under normobaric oxygen incubation.
The effects of substance P (SP), physalaemin, and [D-Pro2, D-Phe7, D-Trp9]-SP on insulin release from isolated, cultured rat islets were investigated. Substance P stimulated insulin secretion in a dose-dependent manner at 0.1-100 nmol/L under one atmosphere of air with glucose 2.75, 5.5 and 20 mmol/L in the culture medium. Physalaemin 100 nmol/L was added to the culture medium, also stimulated insulin secretion. [D-Pro2, D-Phe7, D-Trp9]-SP 10 nmol/L reversed the stimulative effect of substance P. However, substance P 1 nmol/L inhibited insulin secretion from isolated rat islets under hyperbaric oxygen condations.
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D000818:Animals; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005260:Female; D007328:Insulin / Q000378:metabolism*; D000078790:Insulin Secretion; D007515:Islets of Langerhans / Q000378:metabolism*; D008297:Male; D010803:Physalaemin / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D013373:Substance P / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors / Q000494:pharmacology*
D007328:Insulin; D010803:Physalaemin; D013373:Substance P; C041817:substance P, Pro(2)-Phe(7)-Trp(9)-