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Extraglomerular C3 deposition and metabolic impacts in patients with IgA nephropathy

Nephrology Dialysis Transplantation, ISSN: 0931-0509, Vol: 28, Issue: 7, Page: 1856-1864
2013
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Immunofluorescence deposits in the mesangial area and glomerular capillary loops did not affect the prognosis of immunoglobulin a nephropathy except C1q:a single-center retrospective study

1. Moriyama T, Tanaka K, Iwasaki C, Oshima Y, Ochi A, Kataoka H, Itabashi M, Takei T, Uchida K, Nitta K. Prognosis in IgA nephropathy:

Article Description

Background. The aim of the present study was to explore the significance of extraglomerular (Bowman's capsule and/or arteriole) C3 (ex-C3) deposits in IgA nephropathy (IgAN). Methods. One hundred and seventy patients with IgAN were divided into two groups: Group A (n = 79), patients who did not have ex-C3 deposits, and Group B (n = 91), patients who had ex-C3 deposits. Results. At the time of renal biopsy, Group B was characterized by a marked increase in diastolic blood pressure, total cholesterol, triglyceride and low-density lipoprotein-cholesterol compared with those of Group A. After 4 years, the estimated glomerular filtration rate (eGFR) in Group B was significantly worse than that of Group A. Upon examination by electron microscopy, the arteriolar dense deposits in Group B were found to occur in significantly higher amounts than in Group A. One hundred and thirty-four patients underwent a 3-year follow-up study after intervention and were re-divided by therapeutic factors as follows: 'conventional therapy', treatment with anti-hypertensive drugs and/or anti-platelet drugs, and 'aggressive therapy', additional treatment with either tonsillectomy or corticosteroid. Patients treated with conventional therapy in Group B had significantly higher body mass index and levels of C3 and CH50 compared with other Groups. Aggressive therapy was significantly effective in urinary protein reduction in both Group A and Group B. Except for the patients who received aggressive therapy in Group A, the levels of the eGFR gradually declined. Conclusions. It appears that IgAN patients who have ex-C3 deposits have worse clinical outcomes. © The Author 2013.

Bibliographic Details

Ohsawa, Isao; Kusaba, Gaku; Ishii, Masaya; Sato, Nobuyuki; Inoshita, Hiroyuki; Onda, Kisara; Hashimoto, Azusa; Nagamachi, Seiji; Suzuki, Hiyori; Shimamoto, Mamiko; Ohi, Hiroyuki; Horikoshi, Satoshi; Tomino, Yasuhiko

Oxford University Press (OUP)

Medicine

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