Association of glomerular C4d deposition with various demographic data in IgA nephropathy patients; a preliminary study.

Nasri, Hamid. and Ahmadi, Ali. and Rafieian-Kopaei, Mahmoud. and Bashardoust, Bahman. and Nasri, Parto. and Mubarak, Muhammed. (2015) Association of glomerular C4d deposition with various demographic data in IgA nephropathy patients; a preliminary study. Journal of nephropathology, 4 (1). pp. 19-23. ISSN 2251-8363


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BACKGROUND IgA nephropathy (IgAN) is the most prevalent primary chronic glomerulopathy worldwide. Thus, it is of vital importance to search for factors aggravating the disease progress, monitor disease activity and predict disease-specific therapy. C4d is a well-known biomarker of the complement cascade with a potential to meet the above needs. OBJECTIVES The aim of our study was, therefore, to determine whether C4d staining at the time of kidney biopsy had any correlation with the demographic, clinical and biochemical variables in IgAN. PATIENTS AND METHODS The definition of IgAN requires the presence of diffuse and global IgA deposits which were graded ≥2+ and weak C1q deposition. C4d immunohistochemical staining was conducted retrospectively on 29 renal biopsies of patients with IgAN, which were selected randomly from all biopsies. C4d immunohistochemical staining was performed on 3-μm deparaffinized and rehydrated sections of formaldehyde-fixed, paraffin-embedded renal tissues. RESULTS Of 29 selected patients, 68% were male. In this study, 54.2±25 percent of glomeruli in all biopsies were positive for C4d. The mean and standard deviation (SD) of serum creatinine and the magnitude of proteinuria were 1.72±1.2 mg/dl and 1582±1214 mg/day, respectively. In this study, we observed statistically significant correlations of percent C4d positivity with the serum creatinine (r=0.61, p=0.0005), magnitude of proteinuria (r=0.72, p=0.0001), the proportion of globally sclerotic glomeruli (r=0.43, p=0.02) and the proportion of tubulointerstitial fibrosis (r=0.54, p=0.0023). CONCLUSIONS The results from our investigation on C4d positivity in biopsy-proven cases of IgAN are in accord with some of the previous studies. These findings, however, require further validation in larger samples.

Item Type: Article
Uncontrolled Keywords: C4d; Complement; Glomerulopathy; IgA nephropathy; Immunohistochemistry
Subjects: WJ Urogenital System
QW Microbiology and Immunology
Divisions: Reserach Vice-Chancellar Department > Medical Plants Research Center
Depositing User: Users 1 not found.
Date Deposited: 26 Jul 2017 07:14
Last Modified: 30 May 2018 08:04

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