류마티스 관절염 환자의 말초혈액 단핵세포에서 Phosphoinositide 3-Kinase (PI3K)/Akt와 Nuclear Factor KappaB (NF-κB) 신호전달을 통한 IL-17 생성조절

• Published in: Immune network Vol. 3; no. 4; pp. 310 - 319
• Main Authors: 김경운(Kyoung-Woon Kim), 조미라(Mi-La Cho), 이상헌(Sang-Heon Lee), 민소연(So-Youn Min), 박미경(Mi Kyung Park), 박성환(Sung-Hwan Park), 주대명(Dae-Myung Jue), 김호연(Ho-Youn Kim)
• Format: Journal Article
• Language: Korean
• Published: 대한면역학회 2003
• Subjects: PI3K/Akt pathway; Interleukin-17; NF-{\kappa}B; rheumatoid arthritis; PBMC
• ISSN: 1598-2629

Inflammatory mediators has been recognized as an important role in the pathogenesis of rheumatoid arthritis (RA). IL-17 is increasingly recognized as an important regulator of immune and inflammatory responses, including induction of proinflammatory cytokines and osteoclastic bone resorption. Evidence of the expression and proinflammatory activity of IL-17 has been demonstrated in RA synovium and in animal models of RA. However, the signaling pathways that regulate IL-17 production remain unknown. In the present study, we investigated the role of the phosphatidylinositol 3 kinase (PI3K)-Akt pathway in the regulation of IL-17 production in RA. PBMC were separated from RA (n=24) patients, and stimulated with various agents (anti CD3, anti CD28, PHA, ConA, IL-15). IL-17 levels were determined by sandwich ELISA and RT-PCR. The production of IL-17 was significantly increased in cells treated with anti-CD3 antibody, PHA, IL-15 or MCP-1 (P<0.05). ConA also strongly induced IL-17 production (P<0.001), whereas TNF-alpha, IL-1beta, IL-18 or TGF-beta did not. IL-17 was detected in the PBMC of patients with osteoarthritis (OA) but their expression levels were much lower than those of RA PBMC. Anti-CD3 antibody activated the PI3K-Akt pathway and activation of the PI3K-Akt pathway resulted in a pronounced augmentation of nuclear factor kappaB ($NF-{\kappa}B$). IL-17 production by activated PBMC in RA is completely or partially blocked in the presence of $NF-{\kappa}B$ inhibitor PDTC and PI3K-Akt inhibitor, wortmannin and LY294002, respectively. Whereas the inhibition of AP-1 and extracellular signal-regulated kinase (ERK)1/2 did not affect IL-17 production. These results provide new insight into that PI3K/Akt and $NF-{\kappa}B$ dependent signal transduction pathway could be involved in the overproduction of key inflammatory cytokine, IL-17 in rheumatoid arthritis.