Relationship to ME/CFS[edit | edit source]
Increased C4a levels have been found one to six hours after exercise challenge tests in ME/CFS patients but not in healthy controls. Others found a strong relation between the change in complement C4a level and an increase in post-exertional pain and fatigue in ME/CFS patients. Previously, complement C4a, in combination with other proteins, was being considered as a potential marker of post-exertional malaise in ME/CFS.(Full text)
References[edit | edit source]
- Behairy BE, El-Mashad GM, Abd-Elghany RS, Ghoneim EM, Sira MM.Serum complement C4a and its relation to liver fibrosis in children with chronic hepatitis C.World J Hepatol. 2013 Aug 27;5(8):445-51.
- Sorensen B, Streib JE, Strand M, Make B, Giclas PC, Fleshner M, Jones JF. Complement activation in a model of chronic fatigue syndrome.J Allergy Clin Immunol. 2003 Aug;112(2):397-403. PMID: 12897748
- Nijs, J.; Van Oosterwijck, J.; Meeus, M.; Lambrecht, L.; Metzger, K.; Frémont, M.; Paul, L. (2010). "Unravelling the nature of postexertional malaise in myalgic encephalomyelitis/chronic fatigue syndrome: the role of elastase, complement C4a and interleukin-1β". Journal of Internal Medicine. 267 (4): 418–435. doi:10.1111/j.1365-2796.2009.02178.x. ISSN 1365-2796.
- Sorensen, Bristol; Jones, James F; Vernon, Suzanne D; Rajeevan, Mangalathu S (Jan 2009). "Transcriptional Control of Complement Activation in an Exercise Model of Chronic Fatigue Syndrome". Molecular Medicine. 15 (1-2): 34–42. doi:10.2119/molmed.2008.00098. PMC . PMID 19015737.
chronic fatigue syndrome (CFS) - A fatigue-based illness. The term CFS was invented invented by the U.S. Centers for Disease Control as an replacement for myalgic encephalomyelitis (ME). Some view CFS as a neurological disease, others use the term for any unexplained long-term fatigue. Sometimes used as a the term as a synonym of myalgic encephalomyelitis, despite the different diagnostic criteria.