PMID- 15494120 OWN - NLM STAT- MEDLINE DCOM- 20050131 LR - 20220408 IS - 0161-6412 (Print) IS - 0161-6412 (Linking) VI - 26 IP - 7 DP - 2004 Oct TI - Severity dependent up-regulations of LOX-1 and MCP-1 in early sclerotic changes of common carotid arteries in spontaneously hypertensive rats. PG - 767-73 AB - Lectin-like oxidized low-density lipoprotein receptor (LOX-1) and monocyte chemoattractant protein-1 (MCP-1) are molecules involving in the initiation and progression of atherosclerosis. In order to examine a possible difference in LOX-1 and MCP-1 expressions depending on the severity of early stage of atherosclerosis, we investigated atherosclerotic changes by exposure to hypertension and hyperlipidemia in common carotid arteries (CCAs) of stroke-prone spontaneously hypertensive rat (SHR-SP). Three rat model groups such as control [Wistar Kyoto rat (WKY) group], hypertension (SHR-SP group) and hypertension + hyperlipidemia [SHR-SP + high fat and cholesterol (HFC) group] were used. Body weights, brain weights, systolic blood pressures and serum levels of total cholesterol, low-density lipoprotein and triglyceride were measured at 0, 5, 10 and 15 days after appropriate diet. Immunohistochemistry showed that the positive area and the strength of LOX-1 and MCP-1 were larger in the SHR-SP + HFC group than in the SHR-SP group, while no immunoreactivities were found in the WKY group. Conventional RT-PCR and real-time PCR analyses showed that mRNAs of those in the SHR-SP group were higher with greater up-regulation in the SHR-SP + HFC group. LOX-1 and MCP-1 expressions were coordinately up-regulated at mRNA and protein levels in an early stage of sclerosis depending on the severity of atherosclerotic stress. Activations of LOX-1 and MCP-1 are collectively involved in the early stage of atherosclerosis. FAU - Hamakawa, Y AU - Hamakawa Y AD - Department of Neurology, Graduate School of Medicine and Dentistry, Okayama University, Japan. FAU - Omori, N AU - Omori N FAU - Ouchida, M AU - Ouchida M FAU - Nagase, M AU - Nagase M FAU - Sato, K AU - Sato K FAU - Nagano, I AU - Nagano I FAU - Shoji, M AU - Shoji M FAU - Fujita, T AU - Fujita T FAU - Abe, K AU - Abe K LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Neurol Res JT - Neurological research JID - 7905298 RN - 0 (Biomarkers) RN - 0 (Ccl2 protein, rat) RN - 0 (Chemokine CCL2) RN - 0 (Lipids) RN - 0 (OLR1 protein, rat) RN - 0 (RNA, Messenger) RN - 0 (Receptors, LDL) RN - 0 (Receptors, Oxidized LDL) RN - 0 (Scavenger Receptors, Class E) SB - IM MH - Animals MH - Arteriosclerosis/etiology/*metabolism MH - Biomarkers/metabolism MH - Body Weight/physiology MH - Brain/physiology MH - Carotid Artery, Common/*metabolism MH - Chemokine CCL2/genetics/*metabolism MH - Diet MH - Hypertension/genetics/*pathology MH - Immunohistochemistry/methods MH - Lipids/blood MH - Male MH - Models, Cardiovascular MH - Organ Size MH - RNA, Messenger/biosynthesis MH - Rats MH - Rats, Inbred SHR MH - Rats, Inbred WKY MH - Receptors, LDL/genetics/*metabolism MH - Receptors, Oxidized LDL MH - Reverse Transcriptase Polymerase Chain Reaction/methods MH - Scavenger Receptors, Class E MH - Time Factors MH - Up-Regulation EDAT- 2004/10/21 09:00 MHDA- 2005/02/03 09:00 CRDT- 2004/10/21 09:00 PHST- 2004/10/21 09:00 [pubmed] PHST- 2005/02/03 09:00 [medline] PHST- 2004/10/21 09:00 [entrez] AID - 10.1179/016164104225016074 [doi] PST - ppublish SO - Neurol Res. 2004 Oct;26(7):767-73. doi: 10.1179/016164104225016074.