Abstract
The aim of this article is to clarify the relationships between aging or age-related diseases and magnesium (Mg). The mutation of mitochondrial DNA can occur in both aging and Mg deficiency, resulting in peroxidation, intracellular Ca(2+) accumulation and apoptosis. The capability against peroxidation decreases in aging and Mg deficiency. DNA polymerase I, RNA polimerase and DNA helicase require Mg for their activities. Under Mg deficiency the replication, transcription and translation of DNA become erroneous. The dysfunctions of vascular endothelial cell occur in aging and Mg deficiency. In comparison between adult and old rats using the rings of rat thoracic aortae, vasorelaxation by acetylcholine and isoproterenol is lower in old rats, but can be improved through high Mg concentration. Although women with menopause are suffered from osteoporosis due to estrogen deficiency, bone fragility increases with additive Mg deficiency. High Ca intake is recommended for women with menopause, but adequate Mg intake is necessary to lower dietary Ca/Mg ratio, because the high ratio prompts blood coagulation. About lipid metabolism Mg can play a statin-like activity. Mg deficiency is complicated with lifestyle-related diseases, osteoporosis, bone fragility, depression and elderly dementia.
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