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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nephrology+(Carlton)
2016 ; 21
(7
): 624-9
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Myeloperoxidase anti-neutrophil cytoplasmic antibody affinity is associated with
the formation of neutrophil extracellular traps in the kidney and vasculitis
activity in myeloperoxidase anti-neutrophil cytoplasmic antibody-associated
microscopic polyangiitis
#MMPMID26833773
Yoshida M
; Yamada M
; Sudo Y
; Kojima T
; Tomiyasu T
; Yoshikawa N
; Oda T
; Yamada M
Nephrology (Carlton)
2016[Jul]; 21
(7
): 624-9
PMID26833773
show ga
Anti-neutrophil cytoplasmic antibody (ANCA) is associated with small-vessel
vasculitis particularly in the kidneys and can induce the formation of neutrophil
extracellular traps (NETs) from primed neutrophils. Recently we have reported
that the induction of NETs correlates with ANCA affinity for myeloperoxidase
(MPO) and disease activity in patients with MPO-ANCA-associated microscopic
polyangiitis. To investigate whether MPO-ANCA affinity is associated with the
formation of NETs in vivo, we examined the occurrence of NETs in the renal
tissues of patients with MPO-ANCA-associated microscopic polyangiitis and ANCA
affinity by double immunofluorescence staining for NET components of
citrullinated histone, MPO and PAD4 and by ELISA competition with MPO,
respectively. We divided 30 MPO-ANCA-associated microscopic polyangiitis patients
into 2 groups based on their ANCA affinity levels (IC50 for the high:
0.11?±?0.04?µg/mL (Group1) and IC50 for the low: 0.66?±?0.24?µg/mL (Group2)).
Group1 showed a higher Birmingham vasculitis activity score (15.6?±?5.7) and 73%
of the patients presented clinically with rapidly progressive glomerulonephritis
and histologically with focal/crescentic glomerulonephritis (GN). Group 2 showed
a lower Birmingham vasculitis activity score (9.2?±?4.9) and 73% of the patients
presented clinically with chronic renal failure and histologically with
mixed/sclerotic GN. Group 1 showed a much higher occurrence of NETs than Group 2.
Our findings indicate that ANCA affinity was associated with the in vivo
formation of NETs, which might be involved in the pathophysiology of patients
with MPO-ANCA-associated microscopic polyangiitis.