This trial is a phase II, single arm, open-label, single center study to assess the ability of a specialized pre-transplant conditioning regimen, bone marrow transplantation and high dose post-transplant cyclophosphamide to induce tolerance and enable long-term discontinuation of immunosuppression in six kidney transplant recipients.

This study is for participants who have received up to three islet cell infusions as a previous participant in the ITN005CT study. Study participants will receive a maintenance immunosuppressive treatment regimen consisting of a combination of orally administered drugs (tacrolimus (Prograf®), sirolimus (Rapamune®), mycophenolate mofetil (MMF, Cellcept®), and/or mycophenolic acid (MPA, Myfortic®).) This protocol provides a way to supply these immunosuppressive medications to subjects whose islets continue to function and make C-peptide.

The purpose of the RESTARRT study is see if a combination of two drugs, (ATG and rituximab), given at the time of the transplant surgery, will help reduce or eliminate the need for long-term immunosuppressive medication.

This is an observational study for people who have received a kidney transplant within the past 1 to 5 years. Researchers in this study are looking for a certain pattern of genes and cells in the blood that has been found in a group of rare transplant patients who do not need immunosuppression.

This study aims to identify which study participants - all of whom previously received a liver transplant under Campath-1H immunosuppression - exhibit specific tolerogenic genotypes. Our hypothesis is that patients who exhibit these genotypes might be good candidates for future immunosuppression withdrawal.

This study will examine the safety and effectiveness of a combination kidney and bone marrow transplant from a relative with the same (or nearly the same) blood cell type as the transplant recipient. An investigational medication will be given prior to and after the transplant to help protect the transplanted kidney from attack by the body's immune system.

Immunosuppressive drugs are all that separate transplant recipients from rejecting their transplanted organs. The ITN Registry of Tolerant Kidney Transplant Recipients is searching for those rare kidney transplant recipients who have stopped their immunosuppression, but for some reason have not rejected their transplants. If you have received a kidney transplant and have been off all immunosuppressive medications for 1 year and have good kidney function, or if you received your kidney from an identical twin, you may be eligible to participate.

Antirejection medicines, also known as immunosuppressive drugs, are prescribed to organ transplant recipients to prevent their bodies from rejecting the new organ. Long-term use of these drugs places transplant recipients at higher risk of serious infections and certain types of cancer. The purpose of this study is to determine whether immunosuppressive drugs can be safely withdrawn over a minimum of 9 months from children who received liver transplants at least 4 years ago.

In order to prevent organ rejection, patients receiving liver transplants currently require life-long treatment with immune system-suppressing medications. However, these medications can cause long-term side effects, such as infection, kidney problems, diabetes and cancer. This study is investigating whether liver transplant recipients can slowly be taken off these drugs under medical supervision.

This study will determine whether treatment with alemtuzumab and tacrolimus is effective in preventing organ rejection and maintaining the recipient's health after liver transplantation in patients with end-stage liver disease, and whether gradual tapering of tacrolimus treatment is safe for these patients.