Disclosed herein are compositions and methods of use of dock and lock (DNL) complexes comprising a first antibody or fragment that binds to a stem cell antigen and a second antibody or fragment thereof that binds to an antigen on a diseased or damaged tissue or organ. The DNL complexes are of use for targeting stem cells to diseased or damaged organs or tissues and may be used to treat a variety of diseases or conditions that are responsive to stem cell therapy.
