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A polysaccharide from Eclipta prostrata alleviates experimental autoimmune encephalomyelitis through inhibiting Th17 cells

Authors :
Xiaojun Wu
Juan Su
Hongwei Wang
Songshan Shi
Shunchun Wang
Fei Huang
Hui Wu
Feifei Yang
Ning Li
Source :
Carbohydrate Polymers. 201:608-614
Publication Year :
2018
Publisher :
Elsevier BV, 2018.

Abstract

Eclipta prostrata has long been used as a medicinal herb in China. EAP20-1, a homogeneous polysaccharide with anti-complementary activity had been obtained from E. prostrate by using anion-exchange and size-exclusion chromatography. In this study, we found that EAP20-1 could inhibit in vitro lymphocyte proliferation stimulated by concanavalin–A or anti-CD3/anti-CD28 antibodies. Furthermore, in experimental autoimmune encephalomyelitis (EAE) mice, EAP20-1 treatment relieved the clinical symptoms, accompanied by reduced neuroinflammation and demyelination in spinal cords. Mechanistically, EAP20-1 reduced the mRNA expression of interleukin (IL)-17, IL-22, and RAR-related orphan receptor gamma t (RORγt) in the spleen; inhibited auto-reactive T cell proliferation and decreased the percentage of Th17 cells in response to myelin oligodendrocyte glycoprotein (MOG35-55) ex vivo. Moreover, EAP20-1 directly inhibited naive CD4 + T cells differentiate into Th17 cells in vitro. These results indicating EAP20-1 could benefit EAE through inhibiting Th17 cell differentiation and suggesting a therapeutic potential of EAP20-1 in MS.

Details

ISSN :
01448617
Volume :
201
Database :
OpenAIRE
Journal :
Carbohydrate Polymers
Accession number :
edsair.doi.dedup.....c845b16657e7cef9bc3d8dc47dc1059b