Researchers at the University of Southern California (USC) School of Medicine have pinpointed the biological processes that lead to the differentiation of skin stem cells into follicles that grow hair. As people age, the ability to regenerate skin cells declines and therefore, the follicles produce less and less hair. Utilizing a combination of bioinformatics and molecular screenings, the researchers studied the differentiation of stem cells into hair follicles of newborn mice, honing in on genetic factors and environmental cell signals this process entails. The process was then successfully implemented when applied to adult mice that lacked hair by introducing the necessary factors that signal stem cells to differentiate into organoids that will grow hair.
A group of researchers investigated the effectiveness of mesenchymal stem cells for several age-related neurodegenerative disorders. The team implanted the stem cells in a group of 14 patients aged between 30 and 75, including four subjects who had completely gray hair. During their investigation, they made an unusual discovery. After six weeks of stem cell implantation, the reversal of graying hair was observed for both scalp and beard hair.