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Chronic fatigue syndrome and complement activation.
Robert Dennis Geller1, Patricia C Giclas
1FHN, 1045 W Stephenson Street, Freeport, IL 61032, USA.
BMJ Case Reports
|June 21, 2011
Summary
Chronic fatigue syndrome (CFS) following Epstein-Barr virus (EBV) infection may involve complement activation. Positive complement split products correlated with CFS duration and eventual recovery, suggesting a potential diagnostic marker.
Area of Science:
- Immunology
- Virology
- Neurology
Background:
- Chronic fatigue syndrome (CFS) is a complex condition with unclear etiology.
- Epstein-Barr virus (EBV) mononucleosis is a known potential trigger for CFS.
- Standard diagnostic tests for CFS and associated immunological markers are often inconclusive.
Purpose of the Study:
- To investigate the role of complement activation in a patient with CFS following EBV infection.
- To determine if complement split products could serve as a biomarker for CFS.
Main Methods:
- Case report of a patient with CFS post-EBV mononucleosis.
- Exclusion of other etiological factors for chronic fatigue.
- Measurement of complement split products to assess complement activation.
- Longitudinal monitoring of complement split products and CFS symptoms.
Main Results:
- All initial etiological and immunological tests for CFS were negative or normal.
- Complement split products were elevated in the patient with CFS.
- Elevated complement split products persisted for 14 months.
- Patient recovery from CFS coincided with normalization of complement split products.
Conclusions:
- Complement activation may play a role in the pathogenesis of CFS after EBV infection.
- Complement split products show potential as a biomarker for diagnosing and monitoring CFS.
- Further research is warranted to explore complement system involvement in CFS etiology.
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