dr. joseph leventhal is a transplant surgery and director of the living donor kid any program.t few years he and his team has study stem cell research on transplantation. >> the holy grail in our field has been to achieve donor-specific trans plan action tolerance where you don't need anti-rejection drugs to control immune system. >> reporter: that idea is being tested by fusing tell cells from the donor to hepa chief a duly mean system to trick the recipient's body as to seeing in the you kid any as it's a own. >> you have chemotherapy and radiation killing your immune system. and create room in your bone marrow for the infusion of the stem cells. >> reporter: the chemotherapy and radiation are part of the strategy used to reset the immune system. if successful it could mean avoiding the need for daily hands of thes of a ofdailyhand n pills. >> they are poisons in the right amount to control the immune system. >> reporter: taking those drugs for the rest of her life is something lindsay porter has been able to avoid. >> my kidneys weighed about eight pounds a piece. all of my

. >> dr joseph leventhal was a transplant surgeon and running the program. joseph leventhal and his team studied stem cell research on transplantation. >> the holy grail is to achieve donor transplant tolerance, where you don't need drugs to control the immune system. >> that idea is being tested by infusing the patient with stem cells from the donor, to help achieve chimerism, where a dual immune system is set up to trick the recipients body into seeing the new kidney as its own. >> you'll have chemotherapy and radiation killing your immune system, creating room in the bone marrow for the infusion of stem cells. chemotherapy and radiation are part of the strategy to reset the immune system. it could mean the end of daily antirejection pills that increase risk for diabetes, some cancers. >> these drugs are poisons that we use to control the immune system. >> taking the drugs for the rest of her life is something lindsay porter has been able to avoid. >> my kidneys weighed about eight pounds apiece. all my other organs were being crushed together. >> her stem