PMID- 9582443 OWN - NLM STAT- MEDLINE DCOM- 19990105 LR - 20190826 IS - 0169-328X (Print) IS - 0169-328X (Linking) VI - 55 IP - 2 DP - 1998 Apr TI - Excitotoxic injury induces monocyte chemoattractant protein-1 expression in neonatal rat brain. PG - 306-14 AB - Intra-hippocampal injection of NMDA (12.5 nmol) in postnatal day 7 (P7) rats results in neuronal necrosis and hippocampal atrophy; injury extends into the adjacent striatum, thalamus and cortex. NMDA-induced injury is marked by an acute microglial/monocyte response; the molecular signals that control this response and the role of activated microglia/monocytes in the progression of excitotoxic injury are unknown. Monocyte chemoattractant protein-1 (MCP-1) is a well-characterized chemokine that regulates monocyte chemotaxis and activation, and contributes to the pathogenesis of monocyte-dependent tissue injury in several disease models. We hypothesized that MCP-1 could be a regulator of the microglial/monocyte response to excitotoxic injury in neonatal rat brain. To determine if intra-hippocampal NMDA injections induced MCP-1 mRNA expression, in situ hybridization assays were performed in brain samples obtained from 7-day-old rats, evaluated 0-24 h after intra-hippocampal NMDA injection. MCP-1 mRNA expression was first detected at 2 h after lesioning, in the choroid fissure, adjacent to the lesioned hippocampus; levels of expression increased markedly in the lesioned hippocampus and adjacent structures within the first 16 h after NMDA injection, and then rapidly declined. In control animals that received intra-hippocampal saline injections, only minimal MCP-1 mRNA was detected, along the injection track. These results demonstrate that excitotoxic injury transiently induces MCP-1 gene expression in neonatal rat brain. The functional role of MCP-1 in the injured brain remains to be determined. CI - Copyright 1998 Elsevier Science B.V. FAU - Szaflarski, J AU - Szaflarski J AD - Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA. FAU - Ivacko, J AU - Ivacko J FAU - Liu, X H AU - Liu XH FAU - Warren, J S AU - Warren JS FAU - Silverstein, F S AU - Silverstein FS LA - eng GR - HL 48287/HL/NHLBI NIH HHS/United States GR - NS 31054/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Brain Res Mol Brain Res JT - Brain research. Molecular brain research JID - 8908640 RN - 0 (Chemokine CCL2) RN - 0 (Lectins) RN - 0 (RNA, Messenger) RN - 6384-92-5 (N-Methylaspartate) SB - IM MH - Animals MH - Animals, Newborn/*metabolism MH - Brain/drug effects/*metabolism MH - Chemokine CCL2/*biosynthesis/genetics MH - Hippocampus MH - Histocytochemistry MH - In Situ Hybridization MH - Injections MH - Lectins/metabolism MH - N-Methylaspartate/*toxicity MH - RNA, Messenger/metabolism MH - Rats MH - Rats, Sprague-Dawley EDAT- 1998/06/24 00:00 MHDA- 1998/06/24 00:01 CRDT- 1998/06/24 00:00 PHST- 1998/06/24 00:00 [pubmed] PHST- 1998/06/24 00:01 [medline] PHST- 1998/06/24 00:00 [entrez] AID - S0169328X98000138 [pii] AID - 10.1016/s0169-328x(98)00013-8 [doi] PST - ppublish SO - Brain Res Mol Brain Res. 1998 Apr;55(2):306-14. doi: 10.1016/s0169-328x(98)00013-8.