PMID- 15896492 OWN - NLM STAT- MEDLINE DCOM- 20050726 LR - 20161124 IS - 0304-3940 (Print) IS - 0304-3940 (Linking) VI - 381 IP - 3 DP - 2005 Jun 24 TI - Inhibitory effect of gaseous neuromodulators in vasopressin and oxytocin release induced by endotoxin in rats. PG - 320-4 AB - Nitric oxide (NO) and carbon monoxide (CO) are endogenously synthesized gaseous molecules that act as neurotransmitters in central nervous system. In this study we investigated the modulatory role of NO and CO in lipopolysaccharide (LPS)-induced vasopressin and oxytocin secretion. Intracerebroventricular (i.c.v.) injection of N omega-L-nitro-arginine methyl ester (L-NAME), 3-morpholino-sydnonimine (SIN-1), zinc deuteroporphyrin 2,4-bis glicol (ZnDPBG) or hemin did not change the basal vasopressin and oxytocin plasma levels. After endovenous LPS administration, plasma vasopressin and oxytocin increased, reaching a peak at 60 min, and returning to basal levels afterwards. LPS administration induced a higher vasopressin and oxytocin plasma levels in rats previously treated with L-NAME and ZnDPBG (P<0.05) compared to rats pre-treated with vehicle. On the other hand, in rats previously treated with SIN-1 or hemin, there was a significant reduction in the vasopressin and oxytocin secretion. These findings confirm the inhibitory role of NO and CO in the LPS-induced vasopressin and oxytocin secretion. FAU - Giusti-Paiva, Alexandre AU - Giusti-Paiva A AD - Departamento de Fisiologia, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, 14049-900 Ribeirao Preto, Sao Paulo, Brazil. FAU - Elias, Lucila Leico Kagohara AU - Elias LL FAU - Antunes-Rodrigues, Jose AU - Antunes-Rodrigues J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Enzyme Inhibitors) RN - 0 (Lipopolysaccharides) RN - 0 (Neurotransmitter Agents) RN - 11000-17-2 (Vasopressins) RN - 31C4KY9ESH (Nitric Oxide) RN - 50-56-6 (Oxytocin) RN - 7U1EE4V452 (Carbon Monoxide) RN - EC 1.14.13.39 (Nitric Oxide Synthase) RN - EC 1.14.14.18 (Heme Oxygenase (Decyclizing)) SB - IM MH - Animals MH - Carbon Monoxide/pharmacology MH - Enzyme Inhibitors/pharmacology MH - Heme Oxygenase (Decyclizing)/drug effects/metabolism MH - Lipopolysaccharides/pharmacology MH - Male MH - Neurotransmitter Agents/*pharmacology MH - Nitric Oxide/pharmacology MH - Nitric Oxide Synthase/drug effects/metabolism MH - Oxytocin/biosynthesis/blood/*drug effects MH - Rats MH - Rats, Wistar MH - Vasopressins/biosynthesis/blood/*drug effects EDAT- 2005/05/18 09:00 MHDA- 2005/07/27 09:00 CRDT- 2005/05/18 09:00 PHST- 2004/12/16 00:00 [received] PHST- 2005/02/14 00:00 [revised] PHST- 2005/02/16 00:00 [accepted] PHST- 2005/05/18 09:00 [pubmed] PHST- 2005/07/27 09:00 [medline] PHST- 2005/05/18 09:00 [entrez] AID - S0304-3940(05)00217-X [pii] AID - 10.1016/j.neulet.2005.02.040 [doi] PST - ppublish SO - Neurosci Lett. 2005 Jun 24;381(3):320-4. doi: 10.1016/j.neulet.2005.02.040.