Main biomarkers associated with age-related plasma zinc decrease and copper/zinc ratio in healthy elderly from ZincAge study

Roberta Giacconi, Laura Costarelli, Francesco Piacenza, Andrea Basso, Lothar Rink, Erminia Mariani, Tamàs Fülöp, George Dedoussis, Georges Herbein, Mauro Provinciali, Jolanta Jajte, I. Lengyel, Eugenio Mocchegiani, Marco Malavolta

Research output: Contribution to journalArticle

Abstract

Purpose: Zinc (Zn) plays an essential role in many biological processes including immune response. Impaired Zn status promotes immune dysfunction, and it has been associated with enhanced chronic inflammation during aging. It has been suggested that the measurement of circulating Zn by itself could not reflect the real Zn status of an individual. It is therefore necessary to identify other determinants associated with plasma Zn to better understanding how physiopathological conditions during aging may affect the concentration of this metal. Methods: We have investigated the association between Zn levels and some biomarkers in 1090 healthy elderly from five European countries to increase the accuracy in the assessment of the Zn status. Stepwise multivariate linear regression models were used to analyze the influence of factors such as age, dietary intake, inflammatory mediators, laboratory parameters and polymorphisms previously associated with Zn homeostasis. Results: Plasma Zn decrement was most strongly predicted by age, while positive correlations were found with albumin, RANTES and Zn intake after adjustment for multiple confounders. HSP70 +1267 AA genotype was an independent factor associated with Zn plasma concentrations. Cu/Zn ratio was positively associated with markers of systemic inflammation and age and negatively associated with albumin serum levels. Conclusions: Our findings show the most important independent determinants of plasma Zn concentration and Cu/Zn ratio variability in elderly population and suggest that the decline with age of Zn circulating levels is more dependent on physiopathological changes occurring with aging rather than to its nutritional intake.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalEuropean Journal of Nutrition
DOIs
Publication statusAccepted/In press - Jul 26 2016

Keywords

  • Aging
  • Inflammation
  • Polymorphisms
  • Zinc homeostasis
  • Zinc plasma levels

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

Fingerprint Dive into the research topics of 'Main biomarkers associated with age-related plasma zinc decrease and copper/zinc ratio in healthy elderly from ZincAge study'. Together they form a unique fingerprint.

  • Cite this