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Journal of the American Society of Nephrology, Vol 5, 1639-1646, Copyright © 1995 by American Society of Nephrology

REVIEWS

The thymic way to transplantation tolerance

G Remuzzi, N Perico, CB Carpenter and MH Sayegh

Within the past three decades, extensive research has been carried out with the aim to prevent graft rejection by minimizing the side effects related to the use of immunosuppressants. The major goal in transplantation research remains the development of strategies that would allow one to achieve a state of donor-specific unresponsiveness in order to promote a condition of true tolerance without the need of immunosuppressants. Recent evidence has been provided that this is a pursuing goal, at least in experimental animals. The thymus plays the major role in the development of self-tolerance, and initial work in the late 1960s indicated that the thymus also plays a critical role in the induction of acquired tolerance to exogenous antigens. Recently, the interest in acquired thymic tolerance has been renewed by the observation that, in the rat, the thymus is an immunologically privileged site in which isolated pancreatic islets can be engrafted and survive indefinitely. Moreover, intrathymic injection of the islets induced donor-specific unresponsiveness, which allowed survival of a second donor-strain islet cell allograft transplanted into an extrathymic site. These findings on cellular allografts have been extended to vascularized organ allografts.(ABSTRACT TRUNCATED AT 250 WORDS)


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Copyright © 2008 by the American Society of Nephrology. Online ISSN: 1533-3450 Print ISSN: 1046-6673