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  • Title: Effect of met-enkephalin and met-enkephalin-Arg6-Phe7 on bombesin-like immunoreactivity (BLI), somatostatin and gastrin secretion from the perfused rat stomach.
    Author: Madaus S, Schusdziarra V, Erberl T, Seufferlein T, Classen M.
    Journal: Hepatogastroenterology; 1990 Apr; 37(2):201-3. PubMed ID: 1971249.
    Abstract:
    In the present study we examined the effect of the two endogenous opioids met-enkephalin and met-enkephalin Arg6Phe7 on gastric bombesin-like immunoreactivity, gastrin and somatostatin release. At doses of 10(-11), 10(-9), 10(-8) and 10(-6) M both peptides elicited a significant stimulation of bombesin-like immunoreactivity secretion, while the same doses of morphine were ineffective. The stimulatory effect was abolished by naloxone. Met-enkephalin and met-enkephalin Arg6Phe7 stimulated somatostatin secretion at a dose of 10(-8) M, and this effect was reversible by naloxone. Neither peptide had any effect on gastrin secretion. In conclusion, the data demonstrate that both enkephalins must be considered potential regulators of bombesin-like immunoreactivity secretion in the rat stomach.
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