4.6 Review

Sex, aging and immunity in multiple sclerosis and experimental autoimmune encephalomyelitis: An intriguing interaction

Journal

FRONTIERS IN NEUROLOGY
Volume 13, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fneur.2022.1104552

Keywords

sex; relapsing-remitting multiple sclerosis; progressive multiple sclerosis; experimental autoimmune encephalomyelitis; aging

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Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system (CNS) with a neurodegenerative component. Age plays a role in the disease phenotype and progression, as well as the transition from relapsing-remitting MS (RRMS) to secondary progressive disease. Sex also influences disease phenotype and immune system in both humans and animal models. This review focuses on the effects of sex and aging on MS phenotype, immune system, and CNS, using experimental autoimmune encephalomyelitis (EAE) models.
Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system (CNS) with a profound neurodegenerative component early in the disease pathogenesis. Age is a factor with a well-described effect on the primary disease phenotype, namely, the relapsing-remitting vs. the primary progressive disease. Moreover, aging is a prominent factor contributing to the transition from relapsing-remitting MS (RRMS) to secondary progressive disease. However, sex also seems to, at least in part, dictate disease phenotype and evolution, as evidenced in humans and in animal models of the disease. Sex-specific gene expression profiles have recently elucidated an association with differential immunological signatures in the context of experimental disease. This review aims to summarize current knowledge stemming from experimental autoimmune encephalomyelitis (EAE) models regarding the effects of sex, either independently or as a factor combined with aging, on disease phenotype, with relevance to the immune system and the CNS.

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