title: The endocrinology of aging.
abstract: Most aging individuals die from atherosclerosis, cancer, or dementia; but in the oldest old, loss of muscle strength resulting in frailty is the limiting factor for an individual's chances of living an independent life until death. Three hormonal systems show decreasing circulating hormone concentrations during normal aging: (i) estrogen (in menopause) and testosterone (in andropause), (ii) dehydroepiandrosterone and its sulphate (in adrenopause), and (iii) the growth hormone/insulin-like growth factor I axis (in somatopause). Physical changes during aging have been considered physiologic, but there is evidence that some of these changes are related to this decline in hormonal activity. Hormone replacement strategies have been developed, but many of their aspects remain controversial, and increasing blood hormone levels in aging individuals to those found during mid-adult life has not been uniformly proven to be safe and of benefit.
authors.affiliation: Department of Medicine, Erasmus University, Rotterdam, Netherlands. lamberts@inw3.azr.nl
authors.forename: S W
authors.initials: SW
authors.lastname: Lamberts
authors.forename: A W
authors.initials: AW
authors.lastname: van den Beld
authors.forename: A J
authors.initials: AJ
authors.lastname: van der Lely
mesh_terms: D000311:Adrenal Glands / Q000502:physiology; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D000818:Animals; D002979:Climacteric / Q000502:physiology; D003687:Dehydroepiandrosterone / Q000097:blood / Q000627:therapeutic use; D004702:Endocrine Glands / Q000502:physiology*; D015914:Estrogen Replacement Therapy; D005260:Female; D016330:Frail Elderly; D019382:Human Growth Hormone / Q000378:metabolism / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008593:Menopause / Q000502:physiology; D010902:Pituitary Gland / Q000502:physiology; D013739:Testosterone / Q000097:blood / Q000627:therapeutic use
chemical_list: D019382:Human Growth Hormone; D013739:Testosterone; D003687:Dehydroepiandrosterone