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• W1998697029 abstract "We previously reported that intracisternal (i.c.) injection of peptide YY (PYY) and low doses of thyrotropin-releasing hormone (TRH) or TRH analog, RX 77368, increased the resistance of the gastric mucosa to ethanol injury through vagal pathways in rats. The gastroprotective effect of i.c. injection of PYY/neuropeptide NPY (NPY) agonists with differential in vitro affinity to the Y receptor subtypes was examined in urethane-anesthetized rats. Intragastric administration of ethanol (45%, 5 ml/kg) results in mucosal lesions covering 23+/-2% of the gastric corpus in 1 h. PYY (500 ng, i.c.) significantly reduced ethanol-induced gastric lesions by 52%. [Pro34]PYY (PYY-preferring/Y1/Y5/Y4 subtypes) injected i.c. at 50, 100, 200 or 500 ng, reduced dose dependently gastric lesions to 15.4+/-2.2%, 11.4+/-3.1%, 8.6+/-2.9% and 5.4+/-2.2%, respectively. PYY3-36, (Y2/Y4 subtypes), [Leu31, Pro34]NPY (Y1/Y5), NPY (Y3/Y1/Y5/Y2) and pancreatic polypeptide (PP, Y4) injected i.c. at 500 ng did not influence significantly ethanol-induced gastric lesions. Combined i.c. injection of RX 77368 (1 ng) and Pro34PYY (25 ng), at sub-threshold doses given singly, reduced ethanol-induced gastric injury to 12.9+/-2.3% while RX 77368 (1 ng) plus PYY3-36 (500 ng) or [Leu31, Pro34]NPY (25 ng) had no effect. These findings indicate that i.c. PYY-induced gastric protection against 45% ethanol is mediated by a Y receptor subtype which bears similarity with the putative PYY-preferring receptor and distinct from the currently defined Y1/Y5; in addition, there is a synergistic interaction between activation of this PYY-preferring receptor and i.c. TRH to increase the resistance of the gastric mucosa to injury caused by 45% ethanol." @default.
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• W1998697029 date "2000-01-01" @default.
• W1998697029 modified "2023-09-27" @default.
• W1998697029 title "Intracisternal PYY inhibits gastric lesions induced by ethanol in rats: role of PYY-preferring receptors?" @default.
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• W1998697029 doi "https://doi.org/10.1016/s0006-8993(99)02293-3" @default.
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