Abstract
The aging influences the endocrine temporal structure, including DHEAS which can be considered as a biomarker of aging, since its levels gradually decrease in older subjects. The aim of this work was to observe the circadian rhythms of DHEAS, prolactin, cortisol and body temperature, in healthy elderly male subjects (73.7 ± 2.5 years) compared with healthy young subjects (27.2 ± 6.6 years). The results documented that in our subjects no significant age-related differences in prolactin levels existed. In elderly subjects cortisol levels were weakly enhanced in comparison with young subjects. DHEAS showed a preserved circadian rhythm, but markedly lower rhythm adjusted mean (74.38 ± 10.29 versus 273.63 ± 26.39) (p < 0.001) and decreased amplitude of oscillation (p < 0.001), when expressed as absolute value, in elderly subjects when compared with young subjects. In elderly subjects the DHEAS circadian rhythm modifications could represent an impairment of of the endocrine temporal structure.
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