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Zinc status and age-related changes in peripheral blood leukocyte subpopulations in healthy men and women aged 55-70y: the ZENITH study

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Hodkinson, CF, Kelly, M, Coudray, C, Gilmore, WS, Hannigan, BM, O'Connor, JM, Strain, JJ and Wallace, Julie (2005) Zinc status and age-related changes in peripheral blood leukocyte subpopulations in healthy men and women aged 55-70y: the ZENITH study. EUROPEAN JOURNAL OF CLINICAL NUTRITION, 59 (Suppl. 2). S63-S67. [Journal article]

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DOI: 10.1038/sj.ejcn.1602301

Abstract

Objective: To determine zinc status and age-related changes in the immune function of healthy late-middle-aged men and women (aged 55-70 y). Design: Observational study. Setting: Population of Northern Ireland. Subjects: Apparently healthy, free-living individuals (45 men, 48 women) aged 55-70 y. Intervention: Zinc status markers were analysed by flame atomic absorption spectrometry and commercially available kits. Immune function was assessed by flow cytometry. Results: Serum and erythrocyte zinc concentrations were 13.0 (s.d. 1.40) mu mol/l and 222 (s.d. 48.2) mu mol/l, respectively. Serum alkaline phosphatase (ALP) concentrations were 76.8 (s.d. 16.1) U/I; women showed significantly higher concentrations of ALP (P=0.011). Women demonstrated (1) a significant inverse correlation in naive T lymphocytes, specifically naive T-helper lymphocytes (% expression, r= -0.364, P=0.007 and absolute count, r= -0.275, P=0.036) with age and (2) a significant positive correlation between late activation of T lymphocytes (% expression, r=0.299, P=0.019 and absolute count, r=0.260, P=0.039) with advancing age. Men demonstrated a significant positive correlation in the % expression of (CD3-/CD16 + CD56 +) natural killer (NK) cells with age (r=0.316, P=0.017). Conclusions: Between the ages of 55 and 70 y, healthy individuals experience significant alterations in immune function; however, such changes appear largely sex specific. Given the reported importance of adequate zinc status in maintaining optimal immune function, further studies are required to explore the effect of enhanced zinc status on emerging immune deficiencies in cell-mediated immunity in healthy 55-70 y olds.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Northern Ireland Centre for Food and Health (NICHE)
ID Code:15468
Deposited By:Mrs Alison Deehan
Deposited On:27 Sep 2010 14:26
Last Modified:11 Feb 2013 16:02

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