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Serological differences in monozygotic twin pairs discordant for multiple sclerosis
M Bergkvist1, M Sandberg-Wollheim
1Department of Neurology, University Hospital, S-22185 Lund, Sweden. My.Bergkvist@neurol.lu.se
Acta Neurologica Scandinavica
|November 7, 2001
Summary
Investigating identical twins with multiple sclerosis (MS) revealed no common environmental factor. Differences in antibody titers against neurotropic microorganisms were observed, but overall immune systems remained similar.
Area of Science:
- Immunology
- Neurology
- Genetics
Background:
- The exact cause of multiple sclerosis (MS) remains unknown.
- While genetic predisposition is supported by twin studies, environmental factors are also implicated.
- Geographic distribution and migration patterns suggest environmental influences on MS etiology.
Purpose of the Study:
- To investigate potential environmental factors contributing to MS in genetically identical twins.
- To compare immune system responses, specifically antibody titers, in discordant identical twins.
Main Methods:
- Studied three pairs of genetically identical twins discordant for MS.
- Analyzed serum samples for antibodies against 21 viruses, 4 bacteria, and Toxoplasma gondii.
Main Results:
- No single common factor exclusively present in affected twins was identified.
- Serum antibody titers were generally similar between twins.
- Differences were noted in antibody titers against certain neurotropic microorganisms.
Conclusions:
- The study did not identify a universal environmental trigger for MS in these twin pairs.
- Humoral immune system disturbances do not appear to be a major factor in MS.
- Further research into specific neurotropic microorganism interactions may be warranted.