Growth Hormone Secretagogues as Potential Therapeutic Agents to Restore Growth Hormone Secretion in Older Subjects to Those Observed in Young Adults

Author:

Smith Roy G12,Thorner Michael O34

Affiliation:

1. Department of Molecular Medicine, Scripps Research Institute , La Jolla, California , USA

2. Department of Molecular and Cellular Biology, Baylor College of Medicine , Houston, Texas , USA

3. Department of Medicine, University of Virginia , Charlottesville, Virginia , USA

4. Lumos Pharma , Austin, Texas , USA

Abstract

Abstract The discovery of the growth hormone secretagogues (GHS) and the reverse pharmacology leading to the discovery of GHS receptor which enabled the identification of ghrelin as the natural ligand for the receptor have opened a new horizon in growth hormone (GH) physiology, pathophysiology, and therapeutics. Major progress has been made and we now have orally active GHS which are able to restore optimal pulsatile GH secretion which cannot be overstimulated as insulin-like growth factor feedback regulates the peaks to the optimum level. This enables GH to be restored in the older to levels normally seen in 20- to 30-year-old people; this leads to an increase in fat-free mass and redistribution of fat to the limbs. As these agents are ultimately approved and investigated further, it is likely that they will be shown to restore growth in children with moderate-to-mild GH deficiency; their benefits will be investigated in other indications such as nonalcoholic fatty liver disease, frailty, anemia, osteoporosis, and immune compromise in older subjects. The exquisite regulation of GH secretion reflects the importance of GH pulsatility in the regulation of somatotroph action of GH.

Funder

National Institute on Aging

National Institutes of Health

Publisher

Oxford University Press (OUP)

Subject

Geriatrics and Gerontology,Aging

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