Despite being a miracle of modern medicine, solid organ transplant recipients are always at risk of rejection, and remain dependent on lifelong immunosuppression. Currently used immunosuppressive drugs suppress the potential of immune system and interfere with the metabolism of medications. Cellular therapies currently being investigated for this purpose require the use of ablative radiotherapy. The investigators are using a less toxic strategy by harnessing the immunosuppressive potential of the MSCs in the Kidney Transplant (KTx) recipients and studying immunomodulation mediated by these cells in the KTx patients.