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Multiple sclerosis and blood transfusion
1Department of Neurology, Dundee Royal Infirmary, UK.
Abstract:
It has recently been suggested that multiple sclerosis (MS) may be triggered by a retrovirally encoded superantigen. If true, then MS should be associated with risk factors that predispose to retroviral infection. Blood transfusions represent one such risk factor. 150 Scottish patients with 'clinically definite' or 'probable' MS and 150 age-/sex-matched neurological controls were questioned about blood transfusion. 7 (4.7%) of the patients and an equal number of controls had received a blood transfusion before the year of disease onset in the matched case (odds ratio 1.0, 95% C.I. 0.3-3.34). These results provide no evidence that blood transfusion is associated with an increased risk of MS.
Insights
This study investigated if blood transfusions increase multiple sclerosis (MS) risk, as MS might be triggered by retroviral infections. The findings show no evidence linking blood transfusions to a higher risk of developing MS.
Area of Science:
- Neuroimmunology
- Viral Immunology
- Epidemiology
Background:
- Multiple sclerosis (MS) is a demyelinating disease of the central nervous system.
- A recent hypothesis suggests MS may be initiated by a retrovirally encoded superantigen.
- If this hypothesis is correct, factors predisposing to retroviral infection could be MS risk factors.
Purpose of the Study:
- To investigate the association between blood transfusion history and the risk of developing multiple sclerosis (MS).
- To evaluate if blood transfusion, a potential risk factor for retroviral infection, is linked to MS development.
Main Methods:
- A case-control study was conducted with 150 Scottish patients diagnosed with definite or probable MS.
- 150 age- and sex-matched neurological controls were recruited for comparison.
- Participants were interviewed regarding their history of blood transfusions prior to the year of MS onset.
Main Results:
- The study found that 7 (4.7%) of MS patients and 7 (4.7%) of controls had received a blood transfusion before the relevant time point.
- The odds ratio for MS associated with blood transfusion was 1.0 (95% Confidence Interval: 0.3-3.34).
Conclusions:
- The results indicate no statistically significant association between a history of blood transfusion and an increased risk of multiple sclerosis.
- The findings do not support the hypothesis that blood transfusion is a risk factor for MS development, at least in the studied population.