Abstract
An effective method to improve lifespan is not known. Therefore, in this study, we examined the lifespan-extending effect of tranexamic acid in normal mice. We bred hairless mice without exposure to ultraviolet radiation and psychical stress until they died naturally. During the study period, the mice were orally administered tranexamic acid (12mg/kg/day) three times weekly. An increase in the lifespan of mice was observed by tranexamic acid administration. Furthermore, age-related diseases of the skin were ameliorated by tranexamic acid administration. Moreover, the blood level of tumor necrosis factor-α, interleukin-6, reactive oxygen species (ROS), and matrix metalloproteinase (MMP)-9 was decreased by tranexamic acid administration. These results indicate that tranexamic acid suppresses the secretion of inflammatory cytokines, MMP-9, and ROS induced by natural aging, ameliorating age-related diseases, and, consequently, extending the lifespan.
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