Treatment with anti-interferon-gamma monoclonal antibodies modifies experimental autoimmune encephalomyelitis in interferon-gamma receptor knockout mice.

Abstract:

:The role of interferon-gamma (IFN-gamma) in the pathogenesis of multiple sclerosis and experimental autoimmune encephalomyelitis (EAE) is still controversial. We have studied the function of IFN-gamma and its receptor in the EAE model using two different IFN-gamma receptor knockout (IFN-gamma R(-/-)) mouse types: C57Bl/6x129Sv, with a disruption of the IFN-gamma receptor cytoplasmic domain, and 129Sv, homozygous for a disrupted IFN-gamma receptor gene. Mice were immunized with peptide 40-55 from rat myelin oligodendrocyte glycoprotein. A subgroup of mice was treated with anti-IFN-gamma monoclonal antibodies (mAb) on day 8 postimmunization. Clinical scoring and both histological and immunohistochemical studies were undertaken for all groups. We hereby show that treatment with anti-IFN-gamma mAb worsened the disease course of 129Sv wild-type mice. However, it decreased the mean daily score in IFN-gamma R(-/-) 129Sv and the incidence of the disease down to 50% in C57Bl/6x129Sv IFN-gamma R(-/-) mice. Moreover, after anti-IFN-gamma mAb treatment, oxidative stress levels, metallothionein I and II antioxidant protein expression, and apoptoticneuronal death were increased in wild-type mice while decreased in IFN-gamma R(-/-) mice. These results suggest a putative alternative mechanism of action of this cytokine that works independent of its receptor.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Espejo C,Penkowa M,Sáez-Torres I,Xaus J,Celada A,Montalban X,Martínez-Cáceres EM

doi

10.1006/exnr.2001.7815

keywords:

subject

Has Abstract

pub_date

2001-12-01 00:00:00

pages

460-8

issue

2

eissn

0014-4886

issn

1090-2430

pii

S001448860197815X

journal_volume

172

pub_type

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