Modulation of experimental autoimmune encephalomyelitis by endogenous annexin A1.

Journal of Neuroinflammation
Nikolaos PaschalidisFulvio D'Acquisto

Abstract

Autoimmune diseases, like multiple sclerosis, are triggered by uncontrolled activation of cells of the immune system against self-antigen present, for instance, in the central nervous system. We have reported novel biological functions for Annexin A1, an effector of endogenous anti-inflammation, to produce positive actions on the adaptive immune system by reducing the threshold of T cell activation. In this study, we investigated the potential modulatory role of Annexin A1 in the development of experimental autoimmune encephalomyelitis, a model of multiple sclerosis. Male control C57/BL6 and AnxA1 null mice were immunized subcutaneously with an emulsion consisting of 300 microg of MOG35-55 in PBS combined with an equal volume of CFA. Lymph node cells obtained from mice immunized with MOG33-55 for 14 days were re-stimulated in vitro with MOG33-55 (100 microg/ml) for 4 days and the Th1/Th17 cytokine profile measured by ELISA. Spinal cords were processed either to isolate the infiltrated T cells or fixed and stained with haematoxylin and eosin. Statistical analyses were performed using two-tailed, unpaired Student's t tests or ANOVA. Our results show a direct correlation between Annexin A1 expression and severity of EAE. Analysis ...Continue Reading

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Methods Mentioned

BETA
ELISA
FCS
FACS

Software Mentioned

Image Pro
Prism
CellQuest
GraphPad

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