PMID- 18694739 OWN - NLM STAT- MEDLINE DCOM- 20081216 LR - 20151119 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 1233 DP - 2008 Oct 3 TI - Cytokine-induced neutrophil chemoattractant (CINC)-1 induces fever by a prostaglandin-dependent mechanism in rats. PG - 79-88 LID - 10.1016/j.brainres.2008.07.069 [doi] AB - Cytokine-induced neutrophil chemoattractant-1 (CINC-1), a member of the ELR+CXC subfamily [ELR motif (glutamic acid-leucine-arginine) adjacent to the cysteine-X-cysteine (CXC) motif located at the N-terminus of the protein], is an acute-phase protein and its synthesis is induced by endogenous and exogenous pyrogens. However, there are no studies on the pyrogenic property of CINC-1. Therefore, the present study evaluates whether centrally administered CINC-1 promotes an integrated febrile response along with an increase in the prostaglandin (PG)E2 content of the cerebrospinal fluid (CSF) of rats. The effects of antipyretic drugs on fever and on the PGE2 content of the CSF as well as the effectiveness of a neutralizing anti-CINC-1 antibody on the fever induced by CINC-1 have also been investigated. Intracerebroventricular (i.c.v.) injection of CINC-1 induced a dose-dependent bell-shaped rise on body temperature and increased PGE2 concentration in the CSF of conscious rats. Injected into the preoptic area of the anterior hypothalamus (AH/POA) (i.h.), CINC-1 also induced a dose-dependent bell-shaped increase in body temperature along with a decrease on tail skin temperature. Indomethacin (INDO, 2 mg kg(-1), i.p.) and ibuprofen (IBU, 10 mg kg(-1), i.p.) markedly reduced the fever evoked by i.c.v. injection of CINC-1 (25 ng/site). Orally given celecoxib (5 mg kg(-1), 30 min. before) abolished the fever induced by CINC-1 i.c.v. or i.h. (50 pg) injection. The antipyretic drugs also blocked the PGE(2) increase after CINC-1 i.c.v. injection. Co-injected anti-CINC antibody (10 ng/site) strongly reduced the febrile response induced by CINC-1 (50 pg/site) injected intrahypothalamically. This is the first time that centrally injected CINC-1 has been reported to act directly on the pyrogen-sensitive neurons of AH/POA, promoting a thermoregulatory response that seems to depend on other endogenous pyrogens synthesis and, as seen here, on PGE2. FAU - Soares, Denis Melo AU - Soares DM AD - Laboratory of Pharmacology, Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences, USP, Ribeirao Preto, SP, Brazil. FAU - Machado, Renes R AU - Machado RR FAU - Yamashiro, Livia H AU - Yamashiro LH FAU - Melo, Miriam C C AU - Melo MC FAU - Souza, Gloria E P AU - Souza GE LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080729 PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Anti-Inflammatory Agents, Non-Steroidal) RN - 0 (Chemokine CXCL1) RN - 0 (Cxcl1 protein, rat) RN - 0 (Pyrazoles) RN - 0 (Sulfonamides) RN - JCX84Q7J1L (Celecoxib) RN - K7Q1JQR04M (Dinoprostone) SB - IM MH - Analysis of Variance MH - Animals MH - Anti-Inflammatory Agents, Non-Steroidal/pharmacology MH - Body Temperature/physiology MH - Celecoxib MH - Chemokine CXCL1/administration & dosage/drug effects/*physiology MH - Dinoprostone/*cerebrospinal fluid MH - Dose-Response Relationship, Drug MH - Fever/drug therapy/*metabolism MH - Injections, Intraventricular MH - Male MH - Preoptic Area/*metabolism MH - Pyrazoles/pharmacology MH - Rats MH - Rats, Wistar MH - Statistics, Nonparametric MH - Sulfonamides/pharmacology EDAT- 2008/08/13 09:00 MHDA- 2008/12/17 09:00 CRDT- 2008/08/13 09:00 PHST- 2008/01/28 00:00 [received] PHST- 2008/07/11 00:00 [revised] PHST- 2008/07/11 00:00 [accepted] PHST- 2008/08/13 09:00 [pubmed] PHST- 2008/12/17 09:00 [medline] PHST- 2008/08/13 09:00 [entrez] AID - S0006-8993(08)01753-8 [pii] AID - 10.1016/j.brainres.2008.07.069 [doi] PST - ppublish SO - Brain Res. 2008 Oct 3;1233:79-88. doi: 10.1016/j.brainres.2008.07.069. Epub 2008 Jul 29.