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Morning and evening chronotypes in rheumatoid arthritis


Authors: V. Kutal
Authors‘ workplace: Revmatologická ambulance, Brno
Published in: Čes. Revmatol., 21, 2013, No. 2, p. 81-85.
Category: Original Papers

Overview

Morning, neutral or evening chronotypes (diurnal preference) are the basic characteristics of a human being. They are associated with quantitative and temporal changes in secretion of cortisol, IL-6 and melatonin, and play a significant role in the course, and probably, even in the development of rheumatoid arthritis. Thus, the author analyzed the effect of diurnal preference on the prevalence of rheumatoid arthritis. In the analyzed group of 154 patients with rheumatoid arthritis, there were 59.1% morning chronotypes, 35.1% neutral chronotypes and 5.8% evening chronotypes. The control group of 70 individuals without an inflammatory rheumatic disease comprised 37.1% morning, 50.0% neutral and 12.9% evening chronotypes. The larger proportion of morning chronotypes in rheumatoid arthritis was statistically significant (t<0.05). The preference of morning chronotypes in rheumatoid arthritis may be explained by different proportions in the timing of secretion of cortisol, cytokines and melatonin in particular chronotypes.

Key words:
Rheumatoid arthritis, chronobiological rhythms, cytokines, melatonin, inflammatory activity


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Dermatology & STDs Paediatric rheumatology Rheumatology
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