PMID- 14675042 OWN - NLM STAT- MEDLINE DCOM- 20040928 LR - 20061115 IS - 0085-2538 (Print) IS - 0085-2538 (Linking) VI - 65 IP - 1 DP - 2004 Jan TI - Macrophages in mouse type 2 diabetic nephropathy: correlation with diabetic state and progressive renal injury. PG - 116-28 AB - BACKGROUND: Macrophage-mediated renal injury has been implicated in progressive forms of glomerulonephritis; however, a role for macrophages in type 2 diabetic nephropathy, the major cause of end-stage renal failure, has not been established. Therefore, we examined whether macrophages may promote the progression of type 2 diabetic nephropathy in db/db mice. METHODS: The incidence of renal injury was examined in db/db mice with varying blood sugar and lipid levels at 8 months of age. The association of renal injury with the accumulation of kidney macrophages was analyzed in normal db/+ and diabetic db/db mice at 2, 4, 6, and 8 months of age. RESULTS: In db/db mice, albuminuria and increased plasma creatinine correlated with elevated blood glucose and hemoglobin A1c (HbA1c) levels but not with obesity or hyperlipidemia. Progressive diabetic nephropathy in db/db mice was associated with increased kidney macrophages. Macrophage accumulation and macrophage activation in db/db mice correlated with hyperglycemia, HbA1c levels, albuminuria, elevated plasma creatinine, glomerular and tubular damage, renal fibrosis, and kidney expression of macrophage chemokines [monocyte chemoattractant protein-1 (MCP-1), osteopontin, migration inhibitory factor (MIF), monocyte-colony-stimulating factor (M-CSF)]. The accrual and activation of glomerular macrophages also correlated with increased glomerular IgG and C3 deposition, which was itself dependent on hyperglycemia. CONCLUSION: Kidney macrophage accumulation is associated with the progression of type 2 diabetic nephropathy in db/db mice. Macrophage accumulation and activation in diabetic db/db kidneys is associated with prolonged hyperglycemia, glomerular immune complex deposition, and increased kidney chemokine production, and raises the possibility of specific therapies for targeting macrophage-mediated injury in diabetic nephropathy. FAU - Chow, Fiona AU - Chow F AD - Department of Nephrology, Monash Medical Centre, Clayton, Victoria, Australia. FAU - Ozols, Elyce AU - Ozols E FAU - Nikolic-Paterson, David J AU - Nikolic-Paterson DJ FAU - Atkins, Robert C AU - Atkins RC FAU - Tesch, Gregory 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 - 0 (Macrophage Migration-Inhibitory Factors) RN - 0 (Sialoglycoproteins) RN - 0 (Spp1 protein, mouse) RN - 106441-73-0 (Osteopontin) RN - 81627-83-0 (Macrophage Colony-Stimulating Factor) SB - IM MH - Animals MH - Chemokine CCL2/genetics MH - Diabetes Mellitus/epidemiology/immunology/pathology MH - Diabetes Mellitus, Type 2/epidemiology/*immunology/*pathology MH - Diabetic Nephropathies/epidemiology/*immunology/*pathology MH - Female MH - Fibrosis MH - Gene Expression/immunology MH - Hyperglycemia/immunology/pathology MH - Incidence MH - Macrophage Colony-Stimulating Factor/genetics MH - Macrophage Migration-Inhibitory Factors/genetics MH - Macrophages/immunology/*pathology MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Mutant Strains MH - Obesity MH - Osteopontin MH - Sialoglycoproteins/genetics EDAT- 2003/12/17 05:00 MHDA- 2004/09/29 05:00 CRDT- 2003/12/17 05:00 PHST- 2003/12/17 05:00 [pubmed] PHST- 2004/09/29 05:00 [medline] PHST- 2003/12/17 05:00 [entrez] AID - S0085-2538(15)49682-6 [pii] AID - 10.1111/j.1523-1755.2004.00367.x [doi] PST - ppublish SO - Kidney Int. 2004 Jan;65(1):116-28. doi: 10.1111/j.1523-1755.2004.00367.x.