Mouse models of multiple sclerosis: lost in translation?

Area of Science:

• Neuroscience
• Immunology
• Pathology

Background:

• Multiple sclerosis (MS) is a chronic CNS disorder characterized by inflammation, demyelination, and neurodegeneration.
• MS pathogenesis is thought to involve autoimmune responses to CNS antigens, leading to the use of experimental autoimmune encephalomyelitis (EAE) mouse models.
• Other models, including viral and toxin-induced demyelination, are used to study infection, immune cell trafficking, and myelin repair.

Purpose of the Study:

• To review existing mouse models for multiple sclerosis (MS) research.
• To critically evaluate the effectiveness of experimental autoimmune encephalomyelitis (EAE) in preclinical drug development for MS.
• To discuss limitations of current models and propose strategies for improving their utility in developing rational therapies for MS.

Main Methods:

• Review of literature on various MS mouse models: EAE, viral-induced, toxin-induced demyelination, and transgenic models.
• Analysis of the translation of EAE-based therapeutic findings to human MS treatment.
• Discussion of the strengths and weaknesses of each model type for studying different aspects of MS pathology and treatment.

Main Results:

• Experimental autoimmune encephalomyelitis (EAE) is the most common MS model, but few EAE-tested compounds have translated to licensed MS therapies.
• Despite extensive research, the predictive value of EAE for human MS treatment remains a significant challenge.
• Alternative models offer insights into specific disease mechanisms, such as viral involvement and myelin repair, but also have limitations.

Conclusions:

• Current mouse models, particularly EAE, have limitations in predicting therapeutic efficacy for multiple sclerosis.
• There is a need to refine existing models and develop novel preclinical tools to better recapitulate MS complexity.
• Improving mouse models is crucial for advancing the development of effective and rational therapies for multiple sclerosis.