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Evaluation of autoantibodies to common and neuronal cell antigens in chronic fatigue syndrome.

Vernon SD, Reeves WC
Evaluation of autoantibodies to common and neuronal cell antigens in chronic fatigue syndrome
Journal of Autoimmune Diseases 2005:2:5. The complete electronic version of this article is available at http://www.jautoimdis.com/content/2/1/5 or via the Digital Object Identifier System (DOI) at doi:10.1016/j.bbi.2004.05.001

Summary

Dysfunction of the immune system may be important in the pathophysiology of CFS. Several rheumatic and autoimmune disorders are clinically similar to CFS, and reports have shown an increased frequency of autoantibodies in persons with CFS. However, reports of increased autoantibodies may be suspect since the studies used patients from referral clinics rather than from the general population suffering from CFS, and they have enrolled controls of convenience. We collaborated with investigators at the Scripps Research Institute who tested specimens collected in CDC population-based studies of CFS. The Scripps scientists used ELISA, immunoblot, and commercial assays to test serum samples for common autoantibodies and antibodies to neuron-specific antigens. The study found no evidence for a higher rate of autoantibodies in persons with CFS compared with rigorously selected and matched controls from the general population.

Abstract

People with chronic fatigue syndrome (CFS) suffer from multiple symptoms including fatigue, impaired memory and concentration, unrefreshing sleep and musculoskeletal pain. The exact causes of CFS are not known, but the symptom complex resembles that of several diseases that affect the immune system and autoantibodies may provide clues to the various etiologies of CFS. We used ELISA, immunoblot and commercially available assays to test serum from subjects enrolled in a physician-based surveillance study conducted in Atlanta, Georgia and a population based study in Wichita, Kansas for a number of common autoantibodies and antibodies to neuron specific antigens. Subsets of those with CFS had higher rates of antibodies to microtubule-associated protein 2 (MAP2) (p=0.03) and ssDNA (p=0.04). There was no evidence of higher rates for several common nuclear and cellular antigens in people with CFS. Autoantibodies to specific host cell antigens may be a useful approach for identifying subsets of people with CFS, identify biomarkers, and provide clues to CFS etiologies.

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