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Mass. General research could expand availability of hand, face transplants
Date:1/8/2014

Massachusetts General Hospital (MGH) investigators have made an important step towards greater availability of hand transplants, face transplants and other transplants involving multiple types of tissue. In their report in the American Journal of Transplantation, the team describes how a procedure developed at the MGH to induce immune tolerance to organ transplants also induces tolerance to a model limb transplant in miniature swine. Transplantation of donor bone marrow either several months before or simultaneous with the transplant allowed the animals to accept what are called vascularized composite allografts (VCAs) from immunologically mismatched donors.

"The need for lifelong immunosuppression to prevent graft rejection is the most important challenge in this type of procedure, since most potential VCA recipients are young and would face increased risks of infection, diabetes or kidney problems, and even some types of cancer over many years," says Curtis L. Cetrulo, Jr., MD, head of the Hand Transplantation Service in the MGH Division of Plastic and Reconstructive Surgery and senior author of the current report.

"Bringing immunologic tolerance to hand and face transplantation would result in a paradigm shift in the way we will be able to treat the horrific injuries our service members are sustaining in the current military conflicts in Iraq and Afghanistan, as well for the types of blast-injury extremity loss seen in the Boston Marathon bombing. Tolerance would give us a unique tool a real game changer with which to help these patients," he says.

Most frequently used to replace amputated hands and arms and to repair severe facial injuries, VCAs involve transplantation of muscle, bone, skin and nerves. While offering significant improvement in recipients' quality of life, the procedures are not required to preserve a patient's life, making the need for lifelong immunosuppression a disadvantage. The induction of
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Contact: Kristen Chadwick
kschadwick@partners.org
617-643-3907
Massachusetts General Hospital
Source:Eurekalert

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