Scientists have discovered a method to induce human endothelial cells from a small biopsy sample to multiply in the laboratory, producing more than enough cells to replace damaged blood vessels or nourish organs for transplantation, according to a preclinical study by Weill Cornell Medicine investigators. Endothelial cells form the inner lining of blood vessels and regulate blood flow, inflammation and healing. Traditional approaches for growing these cells in the lab have yielded only...