Abstract

In this issue, Matsuda et al. demonstrate the protective effect of mild heat preconditioning on UVB-induced photoaging in SKH-1 hairless mice. Mild heat exposure stimulates the upregulation of HSP70 chaperones, which inhibit the activities of matrix-degenerating enzymes, thereby avoiding wrinkle formation. This newly identified heat-mediated process of adaptation to UVB radiation exposure opens new opportunities to slow extrinsic skin aging.

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