Is it possible for transplant organ rejection to be treated with bone marrow or stem cells from the donor?

A research question: No one knows! Theoretically if one can isolate particular immune cells from the donor that can help make the recipient tolerant to the donor's tissues, this kind of transplant may help. However, the vast majority of solid organ transplants have cadavers as donors and thus, it may be difficult to obtain stem cells from the original donor!