PMID- 16758320 OWN - NLM STAT- MEDLINE DCOM- 20070424 LR - 20220409 IS - 0272-4340 (Print) IS - 0272-4340 (Linking) VI - 26 IP - 4-6 DP - 2006 Jul-Aug TI - Expression of MCP-1 in the hippocampus of SHRSP with ischemia-related delayed neuronal death. PG - 823-31 AB - 1. The expression of monocyte chemoattractant protein-1 (MCP-1) was examined in stroke-prone spontaneously hypertensive rats with transient global ischemia in order to study the involvement of the infiltration of blood monocytes in the mechanism of ischemia-related neuronal death. 2. The brains of the animals with occlusion of the bilateral carotid arteries for 10 min were removed at 8 h, 1, 2, 4 and 7 days after reperfusion. Frozen sections were used for in situ hybridization and tissue specimens from the hippocampus and the cerebral cortex were used to measure the concentration of MCP-1 by ELISA. 3. No MCP-1 mRNA was detected in the hippocampus of the sham group animals. One day after ischemia-reperfusion, MCP-1 mRNA was clearly expressed in the CA4 subfield and the molecular layer of the dentate gyrus, while it was slightly expressed in the lacnosum moleculare of the CA1 subfield. A dramatic expression was demonstrated in the entire CA1 subfield at 2 days after the operation. Most of the cells expressing MCP-1 were astrocytes. At 4 and 7 days after reperfusion, no MCP-1 mRNA was detected in the hippocampus. The concentration of MCP-1 protein dramatically increased in the hippocampus at 2 days after reperfusion. 4. Taken together with the findings of our previous study showing an increased permeability of the blood-brain barrier in the hippocampus from 12 h after ischemia-reperfusion, the astrocytes expressing MCP-1 might therefore induce the migration of monocytes into the brain parenchyma. As a result, such astrocytes expressing MCP-1 may therefore be related to the pathological events of delayed neuronal death in the pyramidal neurons. FAU - Sakurai-Yamashita, Yasuko AU - Sakurai-Yamashita Y AD - Department of Pharmacology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, 852-8523, Japan. yasukosy@net.nagasaki-u.ac.jp FAU - Shigematsu, Kazuto AU - Shigematsu K FAU - Yamashita, Kimihiro AU - Yamashita K FAU - Niwa, Masami AU - Niwa M LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060607 PL - United States TA - Cell Mol Neurobiol JT - Cellular and molecular neurobiology JID - 8200709 RN - 0 (Ccl2 protein, rat) RN - 0 (Chemokine CCL2) SB - IM MH - Animals MH - Brain Ischemia/metabolism/*pathology MH - Carotid Artery, Common/pathology MH - Cell Death MH - Chemokine CCL2/*metabolism MH - Hippocampus/blood supply/*metabolism/pathology MH - Male MH - Neurons/metabolism/*pathology/physiology MH - Rats MH - Rats, Inbred SHR MH - Stroke/complications/metabolism EDAT- 2006/06/08 09:00 MHDA- 2007/04/25 09:00 CRDT- 2006/06/08 09:00 PHST- 2005/11/24 00:00 [received] PHST- 2006/04/21 00:00 [accepted] PHST- 2006/06/08 09:00 [pubmed] PHST- 2007/04/25 09:00 [medline] PHST- 2006/06/08 09:00 [entrez] AID - 10.1007/s10571-006-9077-1 [doi] PST - ppublish SO - Cell Mol Neurobiol. 2006 Jul-Aug;26(4-6):823-31. doi: 10.1007/s10571-006-9077-1. Epub 2006 Jun 7.