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Anti-Gal-C antibody in autoimmune neuropathies subsequent to mycoplasma infection
S Kusunoki1, A Chiba, S Hitoshi
1Department of Neurology, Faculty of Medicine, University of Tokyo, Japan.
Abstract:
Four of 82 patients with Guillain-Barré syndrome (GBS) and 1 of 12 with multifocal motor neuropathy (MMN), who previously had had Mycoplasma pneumoniae infections, had serum antibody to galactocerebroside (Gal-C). Two patients with GBS without mycoplasma infection also had anti-Gal-C antibody, whereas none of the normal or the disease controls had it. As Gal-C is a major glycolipid antigen in myelin, anti-Gal-C antibody may function in the pathogenesis of autoimmune demyelinative neuropathies. Mycoplasma pneumoniae appears to be an important preceding infectious agent in autoimmune neuropathies with anti-Gal-C antibody.
Insights
Antibodies to galactocerebroside (Gal-C) were found in patients with Guillain-Barré syndrome and multifocal motor neuropathy, particularly after Mycoplasma pneumoniae infection. This suggests anti-Gal-C antibodies may play a role in autoimmune nerve damage.
Area of Science:
- Neuroimmunology
- Autoimmune Diseases
- Neuropathology
Background:
- Guillain-Barré syndrome (GBS) and multifocal motor neuropathy (MMN) are immune-mediated demyelinating neuropathies.
- Mycoplasma pneumoniae infections are known triggers for various autoimmune conditions.
Purpose of the Study:
- To investigate the presence of serum antibodies to galactocerebroside (Gal-C) in patients with GBS and MMN.
- To explore the potential role of anti-Gal-C antibodies in the pathogenesis of these neuropathies, especially following Mycoplasma pneumoniae infection.
Main Methods:
- Serum samples from patients with GBS (n=82) and MMN (n=12) were tested for antibodies to galactocerebroside (Gal-C).
- Patient histories were reviewed for preceding Mycoplasma pneumoniae infections.
- Antibody levels were compared between patient groups and healthy/disease controls.
Main Results:
- Anti-Gal-C antibodies were detected in 4/82 GBS patients and 1/12 MMN patients with a history of Mycoplasma pneumoniae infection.
- Two GBS patients without a history of Mycoplasma pneumoniae infection also showed anti-Gal-C antibodies.
- No anti-Gal-C antibodies were found in control groups.
Conclusions:
- The presence of anti-Gal-C antibodies in GBS and MMN patients suggests their involvement in autoimmune demyelinating neuropathies.
- Mycoplasma pneumoniae infection is identified as a significant preceding factor for autoimmune neuropathies associated with anti-Gal-C antibodies.