Skeletal muscle aging – from neurogenic changes to drug toxicity
Journal Title: Postępy Nauk Medycznych - Year 2010, Vol 23, Issue 6
Abstract
Aging refers to all tissues and organs as well as to the skeletal muscles. The strength and mass of skeletal muscles progressively decrease through years and have negative influence on efficiency of people in an old age. Additionally, systemic diseases and both vitamins and mineral elements deficiencies aggravate muscle weakness. Moreover skeletal muscle cells are unable to regenerate. Solely satellite cells present in the skeletal muscle may divide and in proper conditions become mature muscle cells. However, the number of satellite cells constantly decreases with age. During the human life also the number of motoneurons decreases which results in chronic denervation. There are only a few muscle diseases characteristic for people in an old age, and one of them is inclusion body myositis. Additionally, people in an old age are much more susceptible to the negative influence of medications. One of the most widely used and prescribed drugs as the prevention of cardiovascular diseases and stroke are statins. It is very controversial how they react and damage muscle cells, however, they may cause muscle pain, weakness, elevated creatine kinase activity as well as life threatened rhabdomyolsis. Nevertheless, according to the literature statins have more beneficial factors than side effects. Recent years provide new studies on the prevention of progressive disability inseparably connected with aging. One of the potential remedies is encouraging old people to regular physical activity, which may significantly improve the quality of life in elderly.
Authors and Affiliations
Biruta Kierdaszuk, Anna Kamińska
Keywords
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