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. 2010 Apr;65(4):429-33.
doi: 10.1093/gerona/glp198. Epub 2009 Dec 16.

Plasma cytokine levels in a population-based study: relation to age and ethnicity

Raymond P Stowe  1 , M Kristen Peek, Malcolm P Cutchin, James S Goodwin
Affiliations

Plasma cytokine levels in a population-based study: relation to age and ethnicity

Raymond P Stowe et al. J Gerontol A Biol Sci Med Sci. 2010 Apr.

Abstract

Background: Aging is one factor believed to contribute to processes that underlie chronic low-grade inflammation in older adults. Moreover, more recent studies have suggested that cytokine levels are influenced by ethnicity.

Methods: In this study, we determined plasma cytokine profiles in a population-based sample (n = 1,411; aged 25-91 years) to determine the relationship between circulating cytokine levels, aging, and ethnicity. We measured interleukin-1 receptor antagonist (IL-1ra), interleukin (IL)-6, -10, C-reactive protein (CRP), and tumor necrosis factor-receptor 1 (TNF-r1).

Results: IL-6 and TNF-r1 significantly increased with age, whereas IL-1ra, IL-10, and CRP did not significantly increase with age. After adjusting for age, non-Hispanic whites had significantly higher levels of IL-1ra than Mexican Americans, whereas non-Hispanic blacks had significantly higher levels of IL-6 and CRP than Mexican Americans as well as non-Hispanic whites. CRP levels in non-Hispanic blacks were no longer significantly higher after adjusting for body mass index (BMI), indicating that BMI is an important predictor of this inflammatory marker.

Conclusions: These results demonstrate that cytokine levels are influenced by both age and ethnicity. Furthermore, these results show that inflammatory profiles for Mexican Americans are lower than non-Hispanic whites and non-Hispanic blacks.

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Figures

Figure 1.
Figure 1.
Plasma levels of tumor necrosis factor-receptor 1 (TNF-r1) and interleukin (IL)-6 (mean ± SE) by age (n = 1,411).
See this image and copyright information in PMC

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