| abstract |
This document provides methods and materials for treating aging. For example, a mammal having, or at risk for developing, an age-related impairment (e.g., age-related cognitive decline) can be treated by increasing the level of one or more myokine polypeptides (e.g., one or more Klotho polypeptides) within cells within the mammal. This document also provides methods and materials for increasing the ability of muscle progenitor cells to regenerate muscle cells by increasing the level(s) of one or more myokine polypeptides (e.g., an α-Klotho polypeptide) within a muscle progenitor cell. |