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2017 ; 10
(2
): 215-220
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MMP2 and MMP9 associate with crescentic glomerulonephritis
#MMPMID28584626
Phillips TM
; Fadia M
; Lea-Henry TN
; Smiles J
; Walters GD
; Jiang SH
Clin Kidney J
2017[Apr]; 10
(2
): 215-220
PMID28584626
show ga
Background: Systemic lupus erythematosus (SLE) is a systemic autoimmune disease
characterized by multiple organ involvement. Lupus nephritis (LN) is a common
manifestation with a wide variety of histological appearances. Matrix
metalloproteinases (MMP) 2 and 9 are gelatinases capable of degrading glomerular
basement membrane type IV collagen, which have been associated with LN. We
examine the expression of MMP2 and MMP9 in different classes of LN. Methods: MMP2
and MMP9 expression was detected by immunohistochemistry in sections from renal
biopsy specimens with class III, class IV and class V LN (total n = 31),
crescentic immunoglobulin A nephropathy (n = 6), pauci-immune glomerulonephritis
(n = 7), minimal change disease (n = 2), mesangiocapillary glomerulonephritis (n
= 7), diabetic nephropathy (n = 12) and histologically normal controls (n = 8).
Results: MMP2 and MMP9 were not expressed in all classes of LN, but were observed
in LN with cellular and fibrocellular crescents. MMP2/MMP9 was expressed in
cellular and fibrocellular crescents regardless of glomerulonephritis but not
observed in inactive fibrous crescents or with mesangial proliferation. This
suggests that MMP2 and MMP9 are involved in the development of extracapillary
proliferative lesions. Conclusions: MMP2/MMP9 is expressed with active
extracapillary proliferation. Further study is necessary to define whether the
expression of MMP2/MMP9 reflects a role in glomerular repair after injury, a role
in organ-level immune responses or a role as a marker of epithelialization.