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2016 ; 11
(4
): e0152315
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Abatacept Treatment Does Not Preserve Renal Function in the Streptozocin-Induced
Model of Diabetic Nephropathy
#MMPMID27055155
Norlin J
; Nielsen Fink L
; Helding Kvist P
; Douglas Galsgaard E
; Coppieters K
PLoS One
2016[]; 11
(4
): e0152315
PMID27055155
show ga
Diabetic nephropathy (DN) is one of the most severe complications of diabetes and
remains the largest cause of end-stage renal disease in the Western world.
Treatment options are limited and novel therapies that effectively slow disease
progression are warranted. Previous work suggested that treatment with CTLA4-Ig
(abatacept), a molecule that binds and blocks B7-1 and is licensed for the
treatment of rheumatoid arthritis, could ameliorate DN. This study was designed
to assess whether B7-1 signalling constitutes a promising therapeutic pathway for
DN. Mice injected with streptozotocin (STZ) were treated with abatacept and
glycemia and renal function were assessed. No differences were found in diabetes
progression, albumin excretion rates or albumin/creatine ratios, while mesangial
expansion was unaltered at endpoint. Except for increased renal CCL5, treatment
did not affect a panel of gene expression endpoints reflecting early fibrotic
changes, inflammation and kidney injury. Finally, abatacept treatment effectively
reduced the accumulation of activated CD4+ T cells in the kidney, suggesting that
renal T cell inflammation is not a driving factor in the pathology of the STZ
model. In conjunction with the recent data discounting the expression of B7-1 on
podocytes, our present data do not support a role for abatacept in DN treatment.