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13 March 1998

Body Distribution of Syngeneic and Allogeneic Cells From Vascularized Bone Marrow Graft

W L Olszewski, B Lukomska, M Durlik, A Namyslowski, D Laszuk, E Cybulska

Ann Transplant 1998; 3(1): 20-22 :: ID: 497366


In the previous studies we showed that vascularized bone marrow graft (VBMtx) in transplanted rat hind limb brings about complete repopulation of syngeneic recipient BMcavities and lymphoid organs within 10 days. Transplantation of an equivalent number of bone marrow cells (BMC) in suspension did not produce repopulation until day 30. In this study we present data on transplantation of allogeneic VBM and compare them with those obtained in a syngeneic combination. In the LEW or BN to LEW combination BM cells were labelled with 51Cr, injected i.v., 24h later the hind limb was amputated and transplanted to a LEW rat. BM cells emigrated from the transplanted limb to the recipient and distributed in BM cavities and lymphoid tissues. In the LEW to LEW combination the level of radioactivity in recipient tibia was after 24h 0.85, in spleen 2.43, in mesenteric lymph node 0.52%1g of tissue, whearas in the BN to LEW model it was 0.11, 1.83 and 0.15%, respectively. The calculated numbers of BM cells which populated recipient tissues were 8-10-times lower in the allogeneic compared with syngeneic combination. This was probably due to the nonspecific elimination of some subsets of BM cells (allogeneic BMC cytotoxicity). Administration of anti-asialo GM I antiserum to the recipient abrogated the cytotoxic effect. Taken together, major differences in kinetics of seeding and repopulation of BMC from VBMTx were found. Elimination of recipient NKcells with AAGM I antiserum attenuated the nonspecificcytotoxic effect. This protocol allows protection of the grafted BMC and increases the efficacy of the transplant.

Keywords: ascularized bone marrow graft, Bone Marrow, allogeneic, NKcells


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