GABA receptor subtype antagonists in the nucleus accumbens shell and ventral tegmental area differentially alter feeding responses induced by deprivation, glucoprivation and lipoprivation in rats

Brain Research
Y KandovR J Bodnar

Abstract

GABA(A) and GABA(B) receptor agonists stimulate feeding following microinjection into the nucleus accumbens shell and ventral tegmental area, effects blocked selectively and respectively by GABA(A) and GABA(B) receptor antagonists. GABA antagonists also differentially alter opioid-induced feeding responses elicited from these sites. Although GABA agonists and antagonists have been shown to modulate feeding elicited by deprivation or glucoprivation, there has been no systematic examination of feeding elicited by homeostatic challenges following GABA antagonists in these sites. Therefore, the present study examined the dose-dependent ability of GABA(A) (bicuculline, 75-150 ng) and GABA(B) (saclofen, 1.5-3 microg) antagonists administered into the nucleus accumbens shell or ventral tegmental area upon feeding responses elicited by food deprivation (24 h), 2-deoxy-D-glucose-induced glucoprivation (500 mg/kg) or mercaptoacetate-induced lipoprivation (70 mg/kg). A site-specific effect of GABA receptor antagonism was observed for deprivation-induced feeding in that both bicuculline and saclofen administered into the nucleus accumbens shell, but not the ventral tegmental area, produced short-term (1-4 h), but not long-term (24-48 h) ef...Continue Reading

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Citations

May 4, 2012·Psychopharmacology·Heidi KemppainenKalervo Kiianmaa
Mar 7, 2008·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Nicholas M WallingfordMichael A Cowley
Jun 6, 2009·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Rebecca A Darling, Sue Ritter
Apr 27, 2016·Journal of Neuroendocrinology·F M HerissonP K Olszewski
Jan 21, 2014·European Journal of Pharmacology·Marcel Henrique Marcondes SariCristina Wayne Nogueira
May 29, 2016·Progress in Neuro-psychopharmacology & Biological Psychiatry·Elham CharmchiAbbas Haghparast

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