Premium
3′‐Sialyllactose as an inhibitor of p65 phosphorylation ameliorates the progression of experimental rheumatoid arthritis
Author(s) -
Kang LiJung,
Kwon EunSoo,
Lee Kwang Min,
Cho Chanmi,
Lee JaeIn,
Ryu Young Bae,
Youm Tae Hyun,
Jeon Jimin,
Cho Mi Ra,
Jeong SeonYong,
Lee SangRae,
Kim Wook,
Yang Siyoung
Publication year - 2018
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1111/bph.14486
Subject(s) - medicine , arthritis , proinflammatory cytokine , pannus , in vivo , chemokine , rheumatoid arthritis , iκbα , timp1 , synovitis , immunology , immune system , inflammation , pharmacology , nf κb , chemistry , biology , gene expression , biochemistry , microbiology and biotechnology , gene
Background and Purpose 3′‐Sialyllactose (3′‐SL) is a safe compound that is present in high levels in human milk. Although it has anti‐inflammatory properties and supports immune homeostasis, its effect on collagen‐induced arthritis (CIA) is unknown. In this study, we investigated the prophylactic and therapeutic effect of 3′‐SL on the progression of rheumatoid arthritis (RA) in in vitro and in vivo models. Experimental Approach The anti‐arthritic effect of 3′‐SL was analysed with fibroblast‐like synoviocytes in vitro and an in vivo mouse model of CIA. RT‐PCR, Western blotting and ELISA were performed to evaluate its effects in vitro . Histological analysis of ankle and knee joints of mice with CIA was performed using immunohistochemistry, as well as safranin‐O and haematoxylin staining. Key Results 3′‐SL markedly alleviated the severity of CIA in the mice by reducing paw swelling, clinical scores, incidence rate, serum levels of inflammatory cytokines and autoantibody production. Moreover, 3′‐SL reduced synovitis and pannus formation and suppressed cartilage destruction by blocking secretion of chemokines, pro‐inflammatory cytokines, matrix metalloproteinases and osteoclastogenesis via NF‐κB signalling. Notably, phosphorylation of p65, which is a key protein in the NF‐κB signalling pathway, was totally blocked by 3′‐SL in the RA models. Conclusions and Implications 3′‐SL ameliorated pathogenesis of CIA by suppressing catabolic factor expression, proliferation of inflammatory immune cells and osteoclastogenesis. These effects were mediated via blockade of the NF‐κB signalling pathway. Therefore, 3′‐SL exerted prophylactic and therapeutic effects and could be a novel therapeutic agent for the treatment of RA.