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12 March 1999

DNA from Rejecting Allografts Can Be Detected in Recipient Nonlymphoid Tissues

W L Olszewski, M Durlik, B Lukomska, P Religa, H Ziolkowska, S Janczewska, E Cybulska, J Soin, Z Gaciong, B Interewicz

Ann Transplant 1999; 4(1): 39-41 :: ID: 497440


The main source of donor DNA in recipients of allograft are "passenger" cells. They are claimed to be reponsible for the posttransplantation microchimerism and prolongation of allograft survival. We have noticed that beside of the cellular microchimerism, donor DNA can be found in the recipient tissues at the time of rejection of allograft. In this study we provide evidence for presence in the recipient of both, DNA in "passenger cells" and free DNA in tissues at terminal stage of rejection. Male BN (RT In) rat heart or skin were transplanted to female LEW (RT II) rats followed by a vascularized bone marrow in hind-limb transplant. CsA was given in a dose of 17mg/kg b.w. for 30 days, then rats were followed until day 100 unless rejection occurred earlier. LEW blood, spleen, mesenteric node and bone marrow cells were stained with moAb OX27 specific for BN but not LEW. Genomic male DNA was isolated and amplified with SRYoligonucleotide. At day 30 and 100 cellular microchimerism was detected in blood, spleen, nodes and bone marrow cells. Donor DNA was detected in recipient skin, liver and heart extracts, beside of lymphoid organs, at the time of rejection of allograft but not when rats were maintained on CsA. Taken together, donor DNA can be detected in recipient tissues at the time of heart or skin rejection. It seems to be released from cells of rejecting grafts and not from "passenger" cells representing only a minor cellular mass compared with the graft.

Keywords: otolerance, Allograft, DNA, microchimerism

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Annals of Transplantation eISSN: 2329-0358
Annals of Transplantation eISSN: 2329-0358