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Periplocoside A prevents experimental autoimmune encephalomyelitis by suppressing IL-17 production and inhibits differentiation of Th17 cells
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Periplocoside A prevents experimental autoimmune encephalomyelitis by suppressing IL-17 production and inhibits differentiation of Th17 cells
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Journal Article
Periplocoside A prevents experimental autoimmune encephalomyelitis by suppressing IL-17 production and inhibits differentiation of Th17 cells
2009
Overview
Aim： The aim of this study was to determine the therapeutic effect of Periplocoside A （PSA）, a natural product isolated from the traditional Chinese herbal medicine Periploca sepium Bge, in MOG35- 55（myelin oligodendrocyte glycoprotein 35-55）-induced experimental autoimmune encephalomyelitis （EAE）. Methods： Female C57BL/6 mice immunized with MOG35-55 were treated with （50 mg/kg or 25 mg/kg） or without PSA following immunization and continuously throughout the study. The degree of CNS inflammation was evaluated by H＆E staining. Anti-MOG-specific recall responses were analyzed by [^3H]-Thymidine incorporation, ELISA, and RT-PCR. The proportion of IL-17-producing T cells was measured by flow cytometry. Results： Oral administration of PSA significantly reduced the incidence and severity of EAE, which closely paralleled the inhibition of MOG35-55-specific IL-17 production. Importantly, PSA inhibited the transcription of IL-17 mRNA and RORyt. Further studies examining intracellular staining and adoptive transfer EAE validated the direct suppressive effect of PSA on Th17 cells. In vitro studies also showed that PSA significantly inhibited the differentiation of Th17 cells from murine purified CD4 T cells in a dose-dependent manner. Conclusion： PSA ameliorated EAE by suppressing IL-17 production and inhibited the differentiation of Th17 cells in vitro. Our results provide new insight into the potential mechanisms underlying the immunosuppressive and anti-inflammatory effects of PSA.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Biomedical and Life Sciences
/ Cell Differentiation - drug effects
/ Drugs, Chinese Herbal - isolation & purification
/ Drugs, Chinese Herbal - therapeutic use
/ Encephalomyelitis, Autoimmune, Experimental - chemically induced
/ Encephalomyelitis, Autoimmune, Experimental - immunology
/ Encephalomyelitis, Autoimmune, Experimental - prevention & control
/ Female
/ Glycosides - isolation & purification
/ Glycosides - therapeutic use
/ Mice
/ Myelin-Oligodendrocyte Glycoprotein
/ Original
/ Pregnenes - isolation & purification
/ T-Lymphocytes - drug effects
/ Vaccine
/ 实验性
/ 白介素
/ 细胞分化
/ 脑脊髓炎
/ 自身免疫性
