Zebrafish experiments by Harvard University researchers yielded new chemicals that prod stem cells to make muscle tissue, an advance that may lead to treatments for muscular dystrophy and related disorders. Leonard Zon, professor of stem cell and regenerative biology at FAS and Boston Children’s Hospital, is one of the leaders of the study. Amy Wagers, professor of stem cell and regenerative biology at FAS and Joslin Diabetes Center, co-wrote the paper.