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Anti-CD200 attenuates concanavalin A induced hepatitis via modulating the imbalance of CD4 + T lymphocyte differentiation in mice.
Hepatitis occurs in critical ill patients with bad morbidity and mortality. It is known that imbalance of Th1 and Th2 lymphocytes differentiations plays a key role in its mechanisms. Recent studies indicated that type 1 membrane glycoprotein CD200 serves as co-inhibitory molecule, negatively regulating the immune response. In regard of this, we used Concanavalin A (Con A) induced liver injury model to research the effect of CD200 on the differentiation of CD4+ T lymphocyte and found that the expression of CD200 on CD4+ T was significantly higher in hepatitis mouse. The apoptosis of CD4+ T cell in Con A induced liver injury was significantly attenuated by anti-CD200. The concentration of solube IL-2 and IFN-γ was reduced by anti-CD200, in addition, the expression of T-bet, GATA3 and FoxP3 mRNA were all attenuated by anti-CD200. The phosphorylation of SH-2 containing inositol 5' polyphosphatase 1 (SHIP1) was significantly increased in Con A induced liver injury and reduced by anti-CD200. We hypothesized that, anti-CD200 inhibited the phosphorylation of SHIP1, the expression of T-bet, GATA3 and FoxP3 mRNA and CD4+ T differentiation to protect the liver from autoimmune hepatitis.
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