A selection of most recent references that emphasize the role of selenium in aging:

Adaptive dysfunction of selenoproteins from the perspective of the triage theory: why modest selenium deficiency may increase risk of diseases of aging — McCANN J.C. and AMES B.N. — 2011 — FASEB. J., vol. 25, pp. 1793-1814

Plasma selenium is positively related to performance in neurological tasks assessing coordination and motor speed — SHAHAR A. et al. — 2010 — Mov. Disord., vol. 25, pp. 1909-1915

Neuronal selenoprotein expression is required for interneuron development and prevents seizures and neurodegeneration — WIRTH E.K. et al. — 2009 — FASEB. J., doi: 10.1096/fj.09-143974

Selenium level and cognitive function in rural elderly chinese — GAO S. et al. — 2007 — Am. J. Epidemiol., vol. 165, pp. 955-965

Plasma selenium over time and cognitive decline in the elderly — AKBARALY T. et al. — 2007 — Epidemiology, vol. 18, pp. 52-58

Association of low plasma selenium concentrations with poor muscle strength in older community-dwelling adults: The InChianti study — LAURETANI F. et al. — 2007 — Am. J. Clin. Nutr., vol. 86, pp. 347-342

Life-quality indicators in elderly people are influenced by selenium status — GONZALES S. et al. — 2007 — Aging Clin.Exp. Res., vol. 19, n°1, pp. 10-15

Overexpression of phospholipid-hydroperoxide glutathione peroxidase in humal dermal fibroblasts abrogates UVA irradiation-induced expression of interstitial collagenase/matrix metalloproteinase-1 by suppression of phosphatidylcholine hydroperoxide-mediated NFκB activation and interleukin-6 release — WENK J. et al. — 2004 — J. Biol. Chem., vol. 279, n°44, pp. 45634-45642