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首页> 中文期刊> 《浙江大学学报（英文版）B辑：生物医学与生物技术》 >Cornuside alleviates experimental autoimmune encephalomyelitis by inhibiting Th17 cell infiltration into the central nervous system

Cornuside alleviates experimental autoimmune encephalomyelitis by inhibiting Th17 cell infiltration into the central nervous system

         
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The present study was conducted to clarify the therapeutic effect of cornuside on experimental autoimmune encephalomyelitis(EAE)and its influence on T helper 17(Th17)cell and regulatory T(Treg)cell infiltration into the central nervous system.Rats were randomly placed into four treatment groups:control,EAE,EAE+cornuside,and EAE+prednisolone.The neurological function scores of rats were assessed daily.On the second day after EAE rats began to show neurological deficit symptoms,the four groups were treated with normal saline,normal saline,cornuside(150 mg/kg),and prednisolone(5 mg/kg),respectively.The treatment was discontinued after two weeks,and the spinal cord was obtained for hematoxylin and eosin(H&E)and luxol fast blue staining,as well as retinoic acid receptor-related orphan receptorγ(RORγ)and forkhead box protein P3(Foxp3)immunohistochemical staining.Blood was collected for Th17 and Treg cell flow cytometry testing,and the serum levels of interleukin(IL)-17A,IL-10,transforming growth factor-β(TGF-β),IL-6,IL-23,and IL-2 were measured via enzymelinked immunosorbent assay(ELISA).Compared with rats in the EAE group,rats in the EAE+cornuside and EAE+prednisolone groups began to recover from neurological deficits earlier,and had a greater degree of improvement of symptoms.Focal inflammation,demyelination,and RORγ-positive cell infiltration were reduced by cornuside or prednisolone treatment,whereas the Foxp3-positive cell numbers were not significantly different.Meanwhile,the number of Th17 cells and the IL-17A,IL-6,and IL-23 levels were lower in the blood after cornuside or prednisolone treatment,whereas the number of Treg cells or the levels of IL-10,TGF-β,and IL-2 were not markedly different.Cornuside can alleviate symptoms of EAE neurological deficits through its anti-inflammatory and immunosuppressive effects,and Th17 cells may be one of its therapeutic targets.

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