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Chronobiology International
The Journal of Biological and Medical Rhythm Research
Volume 16, 1999 - Issue 5
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Original Article

Biologic Rhythms in the Immune System

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Pages 581-622 | Published online: 07 Jul 2009
 

Abstract

In all of its components, the immune system shows regularly recurring, rhythmic variations in numerous frequencies; the circadian (about 24h) rhythms are the best explored. The circadian variations in immunocompetent cells circulating in the peripheral blood are of a magnitude to require attention in medical diagnostics. Both the humoral arm and the delayed (cellular) arm of the immune system function in a rhythmic manner. The response of the immune system to introduction of an antigen and to challenge of the sensitized organism varies in extent in the circadian frequency range and also in lower frequencies, for example, of about a week (circaseptan) or seasonally (circannual). The medical application of the biologic rhythms of the immune system extends to diagnostic measures, as well as treatment.

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