Multiple sclerosis and cell-mediated hypersensitivity to myelin A1 protein

Area of Science:

• Neuroimmunology
• Clinical Immunology

Background:

• Cellular hypersensitivity to myelin basic protein (A1) is implicated in demyelinating diseases.
• The Migratory Inhibitory Factor (MIF) assay is a tool to measure cellular immune responses.

Purpose of the Study:

• To evaluate cellular hypersensitivity to myelin basic protein (A1) in subjects with and without multiple sclerosis (MS).
• To determine if there is a temporal relationship between A1 protein hypersensitivity and MS clinical activity.

Main Methods:

• The MIF assay was used to assess cellular hypersensitivity to A1 protein.
• 246 subjects were studied, including those with MS (acute, convalescent, chronic), normal controls, and patients with other neurological diseases.

Main Results:

• Positive MIF assay results for A1 protein were observed in 100 subjects with MS, particularly during acute exacerbations.
• Mean MIF values were significantly lower in patients within 4 weeks of MS onset (59%) compared to normal controls (100%).
• Elevated sensitivity was also noted in patients with other central/peripheral nervous system diseases, especially autoimmune conditions.

Conclusions:

• The study establishes a clear temporal relationship between in vitro evidence of hypersensitivity to A1 protein and the clinical expression of MS.
• Cellular hypersensitivity to A1 protein may play a role in the pathogenesis or exacerbation of multiple sclerosis.