PMID- 16374426 OWN - NLM STAT- MEDLINE DCOM- 20060302 LR - 20220321 IS - 0085-2538 (Print) IS - 0085-2538 (Linking) VI - 69 IP - 1 DP - 2006 Jan TI - Monocyte chemoattractant protein-1 promotes the development of diabetic renal injury in streptozotocin-treated mice. PG - 73-80 AB - Diabetic nephropathy involves a renal inflammatory response induced by the diabetic milieu. Macrophages accumulate in diabetic kidneys in association with the local upregulation of monocyte chemoattractant protein-1 (MCP-1); however, the contribution of macrophages to renal injury and the importance of MCP-1 to their accrual are unclear. Therefore, we examined the progression of streptozotocin (STZ)-induced diabetic nephropathy in mice deficient in MCP-1 in order to explore the role of MCP-1-mediated macrophage accumulation in the development of diabetic kidney damage. Renal pathology was examined at 2, 8, 12 and 18 weeks after STZ treatment in MCP-1 intact (+/+) and deficient (-/-) mice with equivalent blood glucose and hemoglobin A1c levels. In MCP-1(+/+) mice, the development of diabetic nephropathy was associated with increased kidney MCP-1 production, which occurred mostly in tubules, consistent with our in vitro finding that elements of the diabetic milieu (high glucose and advanced glycation end products) directly stimulate tubular MCP-1 secretion. Diabetes of 18 weeks resulted in albuminuria and elevated plasma creatinine in MCP-1(+/+) mice, but these aspects of renal injury were largely suppressed in MCP-1(-/-) mice. Protection from nephropathy in diabetic MCP-1(-/-) mice was associated with marked reductions in glomerular and interstitial macrophage accumulation, histological damage and renal fibrosis. Diabetic MCP-1(-/-) mice also had a smaller proportion of kidney macrophages expressing markers of activation (inducible nitric oxide synthase or sialoadhesin) compared to diabetic MCP-1(+/+) mice. In conclusion, our study demonstrates that MCP-1-mediated macrophage accumulation and activation plays a critical role in the development of STZ-induced mouse diabetic nephropathy. FAU - Chow, F Y AU - Chow FY AD - Department of Nephrology, Monash Medical Centre, Clayton, Victoria, Australia. FAU - Nikolic-Paterson, D J AU - Nikolic-Paterson DJ FAU - Ozols, E AU - Ozols E FAU - Atkins, R C AU - Atkins RC FAU - Rollin, B J AU - Rollin BJ FAU - Tesch, G H AU - Tesch GH 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 (Chemokine CCL2) RN - 5W494URQ81 (Streptozocin) SB - IM MH - Animals MH - Chemokine CCL2/*physiology MH - Diabetes Mellitus, Experimental/*complications MH - Diabetic Nephropathies/*etiology MH - Kidney/pathology MH - Macrophage Activation MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Streptozocin EDAT- 2005/12/24 09:00 MHDA- 2006/03/03 09:00 CRDT- 2005/12/24 09:00 PHST- 2005/12/24 09:00 [pubmed] PHST- 2006/03/03 09:00 [medline] PHST- 2005/12/24 09:00 [entrez] AID - S0085-2538(15)51312-4 [pii] AID - 10.1038/sj.ki.5000014 [doi] PST - ppublish SO - Kidney Int. 2006 Jan;69(1):73-80. doi: 10.1038/sj.ki.5000014.