Massachusetts General Hospital (MGH) researchers have taken early steps towards producing a bioengineered heart for transplantation that would use cells from the patient receiving the heart.Using a patient’s own cells would help to overcome some of the problems associated with receiving a heart donated by another person, including immune rejection of the donated heart, as well as the long-term side effects of life-long treatment with the immunosuppressive drugs needed to suppress the immune system and reduce the risk of rejection.