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2017 ; 12
(4
): e0175802
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Anti-IL-20 monoclonal antibody inhibited inflammation and protected against
cartilage destruction in murine models of osteoarthritis
#MMPMID28426699
Hsu YH
; Yang YY
; Huwang MH
; Weng YH
; Jou IM
; Wu PT
; Lin TY
; Wu LW
; Chang MS
PLoS One
2017[]; 12
(4
): e0175802
PMID28426699
show ga
Osteoarthritis (OA) is a degenerative joint disease characterized by progressive
destruction of articular cartilage. Interleukin (IL)-20 is a proinflammatory
cytokine involved in the pathogenesis of rheumatoid arthritis. We investigated
the role of IL-20 in OA and evaluated whether anti-IL-20 antibody (7E) treatment
attenuates disease severity in murine models of surgery-induced OA.
Immunohistochemical staining was used to detect IL-20 and its receptors
expression in synovial tissue and cartilage from OA patients, and in OA synovial
fibroblasts (OASFs) and chondrocytes (OACCs) from rodents with surgery-induced
OA. RTQ-PCR and western blotting were used to determine IL-20-regulated
OA-associated gene expression in OASFs and OACCs. OA rats and OA mice were
treated with 7E. Arthritis severity was determined based on the degree of
cartilage damage and the arthritis severity score. We found that IL-20 and its
receptors were expressed in OASFs and OACCs. IL-20 induced TNF-?, IL-1?, MMP-1,
and MMP-13 expression by activating ERK-1/2 and JNK signals in OASFs. IL-20 not
only upregulated MCP-1, IL-6, MMP-1, and MMP-13 expression, but also
downregulated aggrecan, type 2 collagen, TGF-?, and BMP-2 expression in OACCs.
Arthritis severity was significantly lower in 7E-treated OA rats, and 7E- or
MSC-treated OA mice. Therefore, we concluded that IL-20 was involved in the
progression and development of OA through inducing proinflammatory cytokines and
OA-associated gene expression in OASFs and OACCs. 7E reduced the severity of
arthritis in murine models of surgery-induced OA. Our findings provide evidence
that IL-20 is a novel target and that 7E is a potential therapeutic agent for OA.