Inflammatory Proteins and IL-10 in Obesity and Pathogenic Exposure: Implications for Sickness Syndrome and Fatigue!

Background: Sickness syndrome is a response to infection and inflammation and has been associated with production of Il-1b. Fatigue is a common symptom in environmental illness and may be a factor in sickness syndrome and recent studies provide evidence that activation of the Il-1 system may be a factor in causing the fatigue. Other studies demonstrate that Il-10 can modulate the severity of sickness syndrome through its interactions with HO-1 and other proteins such as BDNF.(Richwine) Richwine has also demonstrated that inflammatory processes increase in aged mice compared to adults. Meador has explained that IL-10 is associated with lower levels of inflammatory cytokines including Tnf-a, Il-1 and Il-6 in muscle and non-muscle.  The effects of aging on the expression of Il-10 would suggest alteration in SIRT1 or Nrf2/HO-1 and/or changes in expression of another gene that is effected by the aging process and high-fat diets.

New Research:
Title: Environmental and genetic factors influence the relationship between circulating Il-10 and obesity phenotypes.

Summary: "circulating IL-10 levels were associated not only with obesity status but also with genetic factors and with the exposure to environmental pathogens."

Citation: Bassols, J., Botas, P., Moreno-Navarrete, J. M., Delgado, E., Ortega, F., Ricart, W., and Fernandez-Real, J. M. (2009). Environmental and genetic factors influence the relationship between circulating il-10 and obesity phenotypes. Obesity (Silver Spring, Md.). http://www.citeulike.org/group/7167/article/5898650

Related Posts:

• Chronic Fatigue, Insulin Resistance, Il-10 and Sickness Syndrome
• CFS, Probiotics and Il-10
• Sickness Syndrome, CFS, Fibromyalgia, IL-10 and HO-1

Additional References:
Richwine, A. F., Sparkman, N. L., Dilger, R. N., Buchanan, J. B., and Johnson, R. W. (2009). Cognitive deficits in interleukin-10-deficient mice after peripheral injection of lipopolysaccharide. Brain, behavior, and immunity, 23(6):794-802. http://www.citeulike.org/user/HEIRS/article/4710107
Godbout, J. P., Chen, J., Abraham, J., Richwine, A. F., Berg, B. M., Kelley, K. W., and Johnson, R. W. (2005). Exaggerated neuroinflammation and sickness behavior in aged mice following activation of the peripheral innate immune system. The FASEB Journal, 19. http://www.citeulike.org/user/HEIRS/article/4745254
Meador, B. M., Krzyszton, C. P., Johnson, R. W., and Huey, K. A. (2008). Effects of il-10 and age on il-6, il-1beta, and tnf-alpha responses in mouse skeletal and cardiac muscle to an acute inflammatory insult. Journal of applied physiology (Bethesda, Md. : 1985), 104(4):991-997. http://www.citeulike.org/user/HEIRS/article/5488212