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2009 ; 182
(11
): 7297-306
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Poly(ADP-ribose) polymerase-1 regulates the progression of autoimmune nephritis
in males by inducing necrotic cell death and modulating inflammation
#MMPMID19454727
Jog NR
; Dinnall JA
; Gallucci S
; Madaio MP
; Caricchio R
J Immunol
2009[Jun]; 182
(11
): 7297-306
PMID19454727
show ga
Necrotic lesions and necrotic cell death characterize severe autoimmune
nephritides, and contribute to local inflammation and to progression of the
disease. Poly(ADP-ribose) polymerase-1 (PARP-1), a DNA repair enzyme, is involved
in the induction of necrosis and is a key player in the acute and chronic
inflammation. Therefore, we hypothesized that PARP-1 controls the severity of
nephritis by mediating the induction of necrosis in the kidney. We used lupus and
anti-glomerular basement membrane models of nephritis to determine the effects of
PARP-1 on the inflammatory response in the kidney. We show in this study that
PARP-1 is indeed activated during the course of glomerulonephritis. We also show
that the absence of PARP-1 or its pharmacological inhibition results in milder
nephritis, with lower blood urea nitrogen levels, reduced necrotic lesions, and
higher survival rates. The relevance of PARP-1 showed a strong male sex
specificity, and treatment of male mice with 17beta-estradiol prolonged their
survival during the course of nephritis. PARP-1 also regulated TNF-alpha
expression and up-regulation of adhesion molecules, further supporting a role of
PARP-1 in the inflammatory process within the kidney. Our results demonstrate
that PARP-1 activation and consequent necrotic cell death play an important role
in the pathogenesis of male nephritis, and suggest that PARP-1 can be a novel
therapeutic target in glomerulonephritis.