title: Correlative insights into immunoexpression of monocyte chemoattractant protein-1, transforming growth factor beta-1 and CD68+ cells in lupus nephritis.
abstract: The experimental data and the study on human renal tissue in patients with glomerulonephropathies indicate that monocyte chemoattractant protein-1 (MCP-1) plays a main role in progression of inflammatory processes in kidney diseases. Monocytes/macrophages are multifunctional cells that may regulate matrix accumulation by producing transforming growth factor beta-1 (TGF-beta-1), which plays an important role in the progression of renal diseases. The present study was undertaken to evaluate the relationships between the immunoexpression of MCP-1, the number of CD68-positive cells, the immunoexpression of TGF-beta-1 and the extent of renal fibrosis as well serum creatinine level in patients with lupus nephritis. Using immunohistochemistry we analyzed the expression of MCP-1, TGF-beta-1 and the number of CD68+ cells in renal biopsy specimens in 17 patients with IV class of lupus nephritis and in 10 normal kidneys. Statistical analysis revealed significant increase in the tubulointerstitial MCP-beta immunostaining in lupus nephritis as compared to normal controls. In lupus nephritis the amount of glomerular and interstitial CD68+ cells was higher than in control group. None of the control sections have evidence of glomerular or tubulointerstitial immunoexpression of TGF-beta-1. In patients with lupus nephritis TGF-beta-1 was detected in the renal tubular epithelial cells and the interstitium, and to a lesser extent within glomeruli. The tubulointerstitial MCP-1 immunoexpression was significantly correlated with monocyte/macrophage interstitial infiltrates, the immunoexpression of TGF-beta-1 in tubuli and interstitium as well as serum creatinine. Moreover, the tubulointerstitial immunoexpression of TGF-beta-1 was significantly positively correlated with renal interstitial cortical volume and serum creatinine in patients with lupus nephritis. In summary, these data suggest that in lupus nephritis MCP-1 may play a role in modulating interstitial inflammatory process and in tubulointerstitial renal damage via TGF-beta-1 pathway.
authors.affiliation: Department of Nephropathology, Medical University, Lódź. emwude@poczta.onet.pl
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Wagrowska-Danilewicz
authors.forename: Olga
authors.initials: O
authors.lastname: Stasikowska
authors.forename: Marian
authors.initials: M
authors.lastname: Danilewicz
mesh_terms: D000293:Adolescent; D000328:Adult; D015703:Antigens, CD / Q000096:biosynthesis*; D015214:Antigens, Differentiation, Myelomonocytic / Q000096:biosynthesis*; D018932:Chemokine CCL2 / Q000096:biosynthesis*; D003404:Creatinine / Q000097:blood; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007249:Inflammation / Q000276:immunology / Q000473:pathology; D008181:Lupus Nephritis / Q000276:immunology / Q000378:metabolism* / Q000473:pathology*; D008264:Macrophages / Q000276:immunology; D008297:Male; D008875:Middle Aged; D016212:Transforming Growth Factor beta / Q000378:metabolism*; D053773:Transforming Growth Factor beta1; D000097382:CD68 Molecule
chemical_list: D015703:Antigens, CD; D015214:Antigens, Differentiation, Myelomonocytic; D018932:Chemokine CCL2; D003404:Creatinine; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; C067980:CD68 antigen, human; D000097382:CD68 Molecule; C508960:TGFB1 protein, human