Scientists, led by the University of California, Irvine, have identified the mechanism by which senescent pigment cells in the skin stimulate hair growth in skin moles, or nevi. The study revealed the crucial role of osteopontin and CD44 molecules in activating hair growth within hairy skin nevi, despite the presence of a high number of senescent pigment cells. This discovery contradicts the commonly held belief that senescent cells, which are usually associated with the aging process, are detrimental to regeneration. Findings may offer a road map for the next generation of therapies for androgenetic alopecia. Researchers have discovered that senescent...