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Absence of glomerular IgG4 deposition in patients with membranous nephropathy may indicate malignancy.
MedLine Citation:
PMID:  21976738     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: The renal pathological manifestations of malignancy-associated membranous nephropathy (M-MN) and idiopathic membranous nephropathy (I-MN) are similar. It has been suggested that glomerular IgG4 deposition may play an important role in the pathogenesis of I-MN. In the present study, we compared the IgG subclass of immune complex deposition, clinical data and pathological data of patients with M-MN and I-MN.METHODS: Eight patients with M-MN and 42 patients with I-MN diagnosed between 1997 and 2009 in our hospital were enrolled. The clinical and pathological data were retrospectively collected, and glomerular IgG subclass deposition was detected by immunohistochemistry.RESULTS: Patients with M-MN were older (P = 0.003), with lower serum albumin (P = 0.034) and higher serum C-reactive protein (CRP) level (P = 0.003) than patients with I-MN. The majority of patients with M-MN had earlier pathological stages (P = 0.003) and less IgG deposition in glomeruli (P = 0.029). Absence of IgG4 deposition in glomeruli was notably observed in patients with M-MN (7/8 in M-MN versus 6/42 in I-MN, P < 0.001) and it was an independent predictor for occurrence of malignancy (hazard ratio 0.065, 95% confidence intervals 0.007-0.571, P = 0.014).CONCLUSION: Absence of glomerular IgG4 deposition, together with older age, severe hypoalbuminemia and high serum CRP level could be useful clues to differentiate M-MN from I-MN.
Authors:
Zhen Qu; Gang Liu; Jun Li; Li-Hua Wu; Ying Tan; Xin Zheng; Jie Ao; Ming-Hui Zhao
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-10-5
Journal Detail:
Title:  Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association     Volume:  -     ISSN:  1460-2385     ISO Abbreviation:  -     Publication Date:  2011 Oct 
Date Detail:
Created Date:  2011-10-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8706402     Medline TA:  Nephrol Dial Transplant     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key laboratory of Renal Disease, Ministry of Health of China, Beijing, China.
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