Longeveron Inc.’s share price (NASDAQ:LGVN) jumped 11.7% on Dec. 3 after the FDA awarded orphan designation to Lomecel-B, allogeneic bone marrow-derived mesenchymal stem cells, for treating hypoplastic left heart syndrome. The designation came two weeks after the FDA granted rare pediatric disease designation for Lomecel-B to treat the life-threatening congenital heart defect in infants.