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Extension of survival of rat parathyroid allografts dy depletion of ia donor cells plus preoperative cyclosporine






Transplantation (Baltimore) 44(2): 171-174

Extension of survival of rat parathyroid allografts dy depletion of ia donor cells plus preoperative cyclosporine

Methods that avoid chronic immunosuppression of transplant recipients must be developed to eliminate the various risk factors associated with such treatment (e.g., increased infections and malignancies). Pretransplant treatment of the graft with anti-Ia serum plus complement to eliminate "passenger cells" is one such method. An alternative approach is short-term treatment of the recipients with cyclosporine (CsA). In this study, parathyroid glands from Lewis .times. Brown Norway rats were cultured for one week at 37.degree. C and treated with anti-Ia and complement. Treatment glands were transplanted into parathyroidectomized, hypocalcemic Wistar-Furth recipients that had received 30 mg/kg of CsA once a day for the three days prior to transplant. At 1 year posttransplant, 67% of the recipients had functional parathyroid allografts. Control rats (no CsA; fresh, untreated glands) rejected their grafts within 28 days. Controls given three days of CsA and transplanted with fresh, untreated glands all had functional grafts for > 56 days (median survival: 80.5 days). Prolongation of allograft survival with short-term, preoperative CsA demonstrates the efficacy of immunsuppression given only at the time of antigen presentation. This course of CsA allowed for indefinite graft survival when the recipient received a graft previously cultured and treated with Ia antiserum. These results are encouraging and shoudl be evaluated further to determine whether similar approaches will bs useful in human transplants.

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Accession: 005432843

PMID: 3307039



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