The heat shock proteins in cellular aging: is zinc the missing link?

Biogerontology. 2006 Oct-Dec;7(5-6):399-408. doi: 10.1007/s10522-006-9055-5.

Abstract

T-cell functions are critical for the efficiency of the adaptive immune response. It is now clear that aging is associated with changes in the T-cell response to antigenic stimulation, one of the many changes collectively resulting in immune senescence. Several hypotheses have been proposed to explain such changes. We believe that chronic stimulation of T-cells enhances the appearance of apoptosis-resistant anergic dysfunctional cells; in humans in vivo these are predominantly specific for antigens of persistent viruses, especially CMV. Concomitantly, age-associated zinc deficiency is common and one hypothesis is that lack of zinc bioavailability contributes to impaired T-cell function. This could further compromise the integrity of T-cells under chronic antigenic stress, which can be modelled in long-term clonal cultures in vitro. Newly synthesized heat-shock proteins (HSPs) protect the cellular proteins from degradation under such conditions. In this short review we will briefly outline the role of heat-shock proteins and zinc deficiency in aging in order to finally discuss our own results in the context of a link between HSPs, aging and zinc.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Aging / immunology
  • Aging / metabolism*
  • Animals
  • Cellular Senescence*
  • Heat-Shock Proteins / metabolism*
  • Humans
  • T-Lymphocytes / immunology
  • T-Lymphocytes / metabolism*
  • Zinc / metabolism*

Substances

  • Heat-Shock Proteins
  • Zinc