PMID- 11115074 OWN - NLM STAT- MEDLINE DCOM- 20010111 LR - 20151119 IS - 0085-2538 (Print) IS - 0085-2538 (Linking) VI - 58 IP - 6 DP - 2000 Dec TI - Monocyte chemoattractant protein-1 and macrophage infiltration in hypertensive kidney injury. PG - 2408-19 AB - BACKGROUND: We investigated whether monocyte chemoattractant protein-1 (MCP-1) is expressed in hypertensive nephrosclerosis, and tested the effect of angiotensin II type 1 receptor blockade on MCP-1 expression and macrophage (MPhi) infiltration. METHODS: Rats with two-kidney, one-clip (2K1C) hypertension with and without treatment with the angiotensin II type 1 receptor antagonist valsartan (3 mg/kg/day) were studied. In these animals as well as in spontaneously hypertensive rats (SHR), stroke-prone SHR (SHR-SP), hypertensive mRen-2 transgenic rats (TGR), and respective control strains, MCP-1 expression in the kidney was investigated by Northern and Western blots and by immunohistochemistry. Glomerular and interstitial MPhis were counted. RESULTS: In the nonclipped kidney of 2K1C rats, MCP-1 expression was elevated at 14 and 28 days when significant MPhi infiltration was present. MCP-1 was localized to glomerular endothelial and epithelial cells, interstitial and tubular cells, MPhis, and vascular smooth muscle cells. A similar pattern of MCP-1 staining was present in TGR kidneys, whereas MCP-1 expression was not increased in SHR and SHR-SP. Valsartan reduced but did not normalize blood pressure, blocked the induction of MCP-1 protein in 2K1C kidneys, and decreased interstitial MPhi infiltration significantly. CONCLUSION: MCP-1 expression is increased in angiotensin II-dependent models of hypertensive nephrosclerosis and is temporally and spatially related to MPhi infiltration. The angiotensin II type 1 receptor mediates the induction of MCP-1. FAU - Hilgers, K F AU - Hilgers KF AD - Department of Medicine IV, University of Erlangen-Nurnberg, Erlangen; Max-Delbruck-Center, Berlin-Buch, Germany. karl.hilgers@rzmail.uni-erlangen.de FAU - Hartner, A AU - Hartner A FAU - Porst, M AU - Porst M FAU - Mai, M AU - Mai M FAU - Wittmann, M AU - Wittmann M FAU - Hugo, C AU - Hugo C FAU - Ganten, D AU - Ganten D FAU - Geiger, H AU - Geiger H FAU - Veelken, R AU - Veelken R FAU - Mann, J F AU - Mann JF LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Kidney Int JT - Kidney international JID - 0323470 RN - 0 (Angiotensin Receptor Antagonists) RN - 0 (Antihypertensive Agents) RN - 0 (Chemokine CCL2) RN - 0 (RNA, Messenger) RN - 0 (Receptor, Angiotensin, Type 1) RN - 0 (Receptor, Angiotensin, Type 2) RN - 0 (Receptors, Angiotensin) RN - 0 (Tetrazoles) RN - 80M03YXJ7I (Valsartan) RN - HG18B9YRS7 (Valine) SB - IM MH - Angiotensin Receptor Antagonists MH - Animals MH - Antihypertensive Agents/pharmacology MH - Blood Pressure MH - Chemokine CCL2/analysis/*genetics MH - Chemotaxis, Leukocyte/immunology MH - Gene Expression/physiology MH - Hypertension, Renal/drug therapy/*immunology/pathology MH - Kidney/chemistry/immunology/pathology MH - Kidney Failure, Chronic/immunology MH - Macrophages/cytology/*immunology MH - Monocytes/cytology/immunology MH - Nephrosclerosis/drug therapy/immunology/pathology MH - RNA, Messenger/analysis MH - Rats MH - Rats, Inbred SHR MH - Rats, Inbred WKY MH - Rats, Mutant Strains MH - Rats, Sprague-Dawley MH - Receptor, Angiotensin, Type 1 MH - Receptor, Angiotensin, Type 2 MH - Receptors, Angiotensin/physiology MH - Tetrazoles/pharmacology MH - Valine/*analogs & derivatives/pharmacology MH - Valsartan EDAT- 2000/12/15 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/12/15 11:00 PHST- 2000/12/15 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/12/15 11:00 [entrez] AID - S0085-2538(15)47357-0 [pii] AID - 10.1046/j.1523-1755.2000.00424.x [doi] PST - ppublish SO - Kidney Int. 2000 Dec;58(6):2408-19. doi: 10.1046/j.1523-1755.2000.00424.x.