Stress-mediated hormetic modulation of aging, wound healing, and angiogenesis in human cells.

Abstract:

:Aging is amenable to intervention and prevention by mild stress-induced hormesis. Previously, we have reported that repeated mild heat stress has antiaging and other beneficial effects on growth and a range of cellular and biochemical characteristics of normal human skin fibroblasts and keratinocytes undergoing aging in vitro. We have also established a model system of sugar-induced premature senescence in human cells, which can be useful for monitoring the protective and hormetic effects of other treatments. We have now initiated studies on testing the hormetic effects of glyoxal and heat shock on the wound-healing capacity of skin fibroblasts and on the angiogenic ability of endothelial cells. The effects of glyoxal on the extent of wound closure in vitro showed a typical biphasic hormetic curve with 20-40% stimulation at lower doses (up to 0.125 mmol) and more than 50% inhibition at concentrations above 0.5 mmol. In the case of angiogenesis by endothelial cells, measured by the standard tube formation assay on Matrigel, a prior exposure to mild heat shock at 41 degrees C for 1 h increased the total tube length and total number of junctions by 30-60% and 10-14%, respectively. In contrast, a severe heat shock at 42.5 degrees C had slightly inhibitory effects on total tube length and the number of junctions. These data add to the ever-growing body of evidence in support of the view that mild stress-induced hormesis can be a useful approach for the modulation, intervention, and prevention of aging and age-related impairments.

journal_name

Ann N Y Acad Sci

authors

Rattan SI,Sejersen H,Fernandes RA,Luo W

doi

10.1196/annals.1404.005

subject

Has Abstract

pub_date

2007-11-01 00:00:00

pages

112-21

eissn

0077-8923

issn

1749-6632

pii

1119/1/112

journal_volume

1119

pub_type

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