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2017 ; 28
(4
): 1306-1313
Nephropedia Template TP
gab.com Text
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English Wikipedia
A Randomized, Controlled Trial of Rituximab in IgA Nephropathy with Proteinuria
and Renal Dysfunction
#MMPMID27821627
Lafayette RA
; Canetta PA
; Rovin BH
; Appel GB
; Novak J
; Nath KA
; Sethi S
; Tumlin JA
; Mehta K
; Hogan M
; Erickson S
; Julian BA
; Leung N
; Enders FT
; Brown R
; Knoppova B
; Hall S
; Fervenza FC
J Am Soc Nephrol
2017[Apr]; 28
(4
): 1306-1313
PMID27821627
show ga
IgA nephropathy frequently leads to progressive CKD. Although interest surrounds
use of immunosuppressive agents added to standard therapy, several recent studies
have questioned efficacy of these agents. Depleting antibody-producing B cells
potentially offers a new therapy. In this open label, multicenter study conducted
over 1-year follow-up, we randomized 34 adult patients with biopsy-proven IgA
nephropathy and proteinuria >1 g/d, maintained on angiotensin-converting enzyme
inhibitors or angiotensin receptor blockers with well controlled BP and eGFR<90
ml/min per 1.73 m(2), to receive standard therapy or rituximab with standard
therapy. Primary outcome measures included change in proteinuria and change in
eGFR. Median baseline serum creatinine level (range) was 1.4 (0.8-2.4) mg/dl, and
proteinuria was 2.1 (0.6-5.3) g/d. Treatment with rituximab depleted B cells and
was well tolerated. eGFR did not change in either group. Rituximab did not alter
the level of proteinuria compared with that at baseline or in the control group;
three patients in each group had ?50% reduction in level of proteinuria. Serum
levels of galactose-deficient IgA1 or antibodies against galactose-deficient IgA1
did not change. In this trial, rituximab therapy did not significantly improve
renal function or proteinuria assessed over 1 year. Although rituximab
effectively depleted B cells, it failed to reduce serum levels of
galactose-deficient IgA1 and antigalactose-deficient IgA1 antibodies. Lack of
efficacy of rituximab, at least at this stage and severity of IgA nephropathy,
may reflect a failure of rituximab to reduce levels of specific antibodies
assigned salient pathogenetic roles in IgA nephropathy.