Regional differences in mitotic activity due to injury in mouse skin

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Abstract
Mitotic activity adjacent to a wound inflicted at different sites in the mouse skin was measured 24 h after injury. A regional difference in the epidermal mitotic activity due to injury was noted. Mitotic activity was high in the anterior parts of the body including the head, lower in the middle to posterior regions of the body and lowest in the posterior-most parts of the body. Regional differences in epidermal mitotic activity due to injury were demonstrated in both female and male mice. The existence of a cranio-caudal gradient in epidermal response to injury is suggested.