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- W2012282975 abstract "To examine the role and working site of growth hormone-releasing factor (GRF) in feeding behavior, we first tested the effect of the intracerebroventricular (i.c.v.) injection of GRF on food intake after 24 h of food deprivation. Cumulative food intake was measured 1, 3 and 6 h after injection. A lower dose of GRF stimulated food intake in a dose dependent manner (3h; GRF100pmol8.64 ± 1.06g vs saline5.50 ± 0.60g, P < 0.05), while a higher dose (1 nmol, 500 pmol) suppressed food intake (3h; GRF1mol2.65 ± 0.70g vssaline5.50 ± 0.60g, P < 0.01). Second, the effect of i.c.v. injection of 100 pmol of GRF on peripheral metabolites was examined. The subsequent levels of plasma insulin, glucagon, glucose and non-esterified fatty acid showed no significant difference from those of saline administration. Third, the effect of microinjection of GRF (5 pmol) into several hypothalamic areas on food intake was examined. Injection into the ventromedial hypothalamic nucleus (VMN) stimulated food intake (3h;GRF5pmol10.32 ± 1.04g vs saline6.92 ± 0.32g, P < 0.05), but no significant effect was observed following injection either into the lateral hypothalamic area (LHA), paraventricular nucleus (PVN) or medial preoptic area (MPOA). Finally, we tested the stimulatory effect of GRF on food intake in bilateral VMN lesioned rats. I.c.v. injection in these animals had no more significant effect on food intake than did saline injection in VMN lesioned rats (3h;GRF100pmol6.27 ±0.87g vs saline5.34 ± 0.44g). These results suggest that administration of a low dose of GRF centrally enhances feeding behavior and that the VMN is one of the working sites of this effect." @default.
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- W2012282975 date "1991-09-01" @default.
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- W2012282975 title "Effect of hypothalamic administration of growth hormone-releasing factor (GRF) on feeding behavior in rats" @default.
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- W2012282975 doi "https://doi.org/10.1016/0006-8993(91)90778-t" @default.
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