Ghrelin may be an effective treatment for age-related muscle loss
The hormone, ghrelin, may help protect the elderly population from muscle loss, according to a study being presented at e-ECE 2020.
The study found that administering a particular form of ghrelin to older mice helped to restore muscle mass and strength. As muscle-related diseases are a serious health concern in the elderly population, these findings suggest a potential new treatment strategy for muscle loss to enable the aging population to remain fit and healthy.
Age-related skeletal muscle mass loss, in absence of any underlying disease, is defined as sarcopenia, which leads to deterioration of elderly people's quality of life. It causes a decline in muscle mass and functionality, often resulting in poor balance, higher risk of falls or fractures, immobilisation and loss of independence.
Ghrelin is a hormone involved in metabolic regulation and energy balance through activation of appetite, but also plays an important role in protecting against muscle wasting. Both acylated (AG) and unacylated (UnAG) forms are present in the body, but UnAG does not bind to the AG receptor (GHSR-1a), so does not increase appetite. A growing body of evidence indicates that UnAG is acting at an unidentified receptor, which also mediates some common AG and UnAG biological activities, including a strikingly protective effect against muscle wasting. Ghrelin levels decline as we age and may be involved in the development of sarcopenia, but the role of AG versus UnAG in this process has not been investigated previously.
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