A Kv1.3 channel-specific blocker alleviates neurological impairment through inhibiting T-cell activation in experimental autoimmune encephalomyelitis.

Abstract:

AIM:Multiple sclerosis (MS) is a neurological autoimmune disorder characterized by mistaken attacks of inflammatory cells against the central nervous system (CNS), resulting in demyelination and axonal damage. Kv1.3 channel blockers can inhibit T-cell activation and have been designed for MS therapy. However, little is known about the effects of Kv1.3 blockers on protecting myelin sheaths/axons in MS. This study aimed at investigating the neuroprotection efficacy of a selective Kv1.3 channel blocker ImKTx88 (ImK) in MS animal model. METHODS:Experimental autoimmune encephalomyelitis (EAE) rat model was established. The neuroprotective effect of ImK was assessed by immunohistochemistry and transmission electron microscopy (TEM). In addition, the antiinflammatory effect of ImK by suppressing T-cell activation was assessed by flow cytometry and ELISA in vitro. RESULTS:Our results demonstrated that ImK administration ameliorated EAE clinical severity. Moreover, ImK increased oligodendrocytes survival, preserved axons, and myelin integrity and reduced the infiltration of activated T cells into the CNS. This protective effect of the peptide may be related to its suppression of autoantigen-specific T-cell activation via calcium influx inhibition. CONCLUSION:ImK prevents neurological damage by suppressing T-cell activation, suggesting the applicability of this peptide in MS therapy.

journal_name

CNS Neurosci Ther

authors

Yuan XL,Zhao YP,Huang J,Liu JC,Mao WQ,Yin J,Peng BW,Liu WH,Han S,He XH

doi

10.1111/cns.12848

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

967-977

issue

10

eissn

1755-5930

issn

1755-5949

journal_volume

24

pub_type

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