Complement dependen cytotoxic antibody activity against measles virus in multiple sclerosis

Area of Science:

• Immunology
• Virology
• Neurology

Background:

• Measles virus is a potential environmental trigger for multiple sclerosis (MS).
• Immune responses to measles virus are studied in MS patients to understand disease mechanisms.

Purpose of the Study:

• To compare measles cytotoxic (CT) and hemagglutination inhibition (HI) antibody levels in multiple sclerosis (MS) patients and healthy controls.
• To investigate the potential role of measles virus in MS pathogenesis.

Main Methods:

• Cytotoxic (CT) antibody testing using 51Cr-labeled measles virus Lu carrier cells and complement.
• Hemagglutination inhibition (HI) antibody testing.
• Comparison of antibody titers between 195 MS patients and 251 controls.

Main Results:

• Significantly higher titers of complement-dependent CT antibodies against measles virus were found in MS patients (P < 0.01).
• Measles CT titers ≥ 1:32 were observed in 54.9% of MS patients versus 35.5% of controls.
• The measles HI test did not reveal significant differences in antibody levels between groups.

Conclusions:

• MS patients possess functional defense mechanisms against measles virus-infected cells, evidenced by CT antibodies.
• Elevated measles antibody titers in MS patients may suggest persistent measles virus infection and recurrent antigenic stimulation.
• The direct role of measles virus persistence in the development or progression of MS requires further investigation.