Cyclic MOG35-55 ameliorates clinical and neuropathological features of experimental autoimmune encephalomyelitis.

Abstract:

:EAE is induced to susceptible mice using linear peptides of myelin proteins of the central nervous system. Specific peptide motifs within the peptide-binding groove of the MHC peptide-complex determines the affinity of the peptide in each animal and the consequent T-cell receptor recognition and activation of the cell. Altered peptide ligand (APL) vaccination is a novel approach based on an effort to induce T-cell tolerance or alter cytokine profile from pro-inflammatory to anti-inflammatory. In the present study we synthesized the MOG35-55 peptide and altered its 3-dimensional conformation to make it a cyclic one (c-MOG35-55). EAE was induced in C57BL/6 mice and pathology was studied on acute and chronic phase of the disease. Our data indicates that c-MOG35-55 peptide alone induces a mild transient acute phase without chronic axonopathy. Administration of the c-MOG35-55 peptide at a 1:1 ratio during disease induction significantly ameliorates clinical disease and underlying pathology, such as demyelination and axonopathy in the acute and chronic phases. Binding and structural studies revealed milder interactions between the c-MOG35-55 and mouse or human MHC class II alleles (H2-IAb and HLA-DR2). Collectively, we provide data supporting for the first time the concept that the cyclic modification of an established encephalitogenic peptide ameliorates the clinical outcomes and underlying pathological processes of EAE. Such a cyclic modification of linear peptides could provide a novel treatment approach for future, patient-selective, immunomodulative treatments of multiple sclerosis.

journal_name

Bioorg Med Chem

authors

Lourbopoulos A,Deraos G,Matsoukas MT,Touloumi O,Giannakopoulou A,Kalbacher H,Grigoriadis N,Apostolopoulos V,Matsoukas J

doi

10.1016/j.bmc.2017.06.005

subject

Has Abstract

pub_date

2017-08-01 00:00:00

pages

4163-4174

issue

15

eissn

0968-0896

issn

1464-3391

pii

S0968-0896(17)30998-7

journal_volume

25

pub_type

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