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Wednesday 01 February 2006

Use of capecitabine after renal allograft transplantation in dog erythrocyte antigen-matched dogs.

By: Schmiedt C, Penzo C, Schwab M, Dubielzig R, McAnulty J.

Vet Surg 2006 Feb;35(2):113-24

OBJECTIVES: To investigate the use of a capecitabine (CAP)-based regimen after renal transplantation in dogs. STUDY DESIGN: Prospective, pilot study. ANIMALS: Healthy, unrelated, dog erythrocyte antigen (DEA)-matched, adult beagles. METHOD: Standard heterotopic renal transplantation with native nephrectomy was performed in 7 dogs. Dogs received oral, twice daily, CAP (250 mg/m2), cyclosporine-A (CsA) (4 mg/kg), ketoconazole (5 mg/kg), and prednisolone (0.25 mg/kg). After 90 days the surviving dogs were euthanatized and complete necropsy was performed. RESULTS: Seven transplants were performed. All dogs survived surgery. Six dogs had acute neurotoxicity, which resulted in death or euthanasia of 2 dogs within 2 days of surgery. In the remaining dogs, toxicity resolved rapidly with cessation of drug administration. Thereafter, modification of the regimen minimized toxicity. The 5 remaining dogs survived to study end; 4 dogs had no evidence of graft rejection. Necropsy examination was mostly unremarkable in all dogs. There were no major changes in CBC or biochemical values, except for a significant increase in serum calcium. CONCLUSIONS: CAP appeared well tolerated in most dogs. Toxicity occurred but abated with modification of the drug regimen. Efficacy for postoperative immunosuppression cannot be determined by this study, although results are promising. CLINICAL RELEVANCE: CAP-CsA-prednisolone is an effective, oral immunosuppressive regimen for prevention of acute allograft rejection in DEA-matched beagles. Further studies on dose, toxicity, and efficacy compared with current immunosuppressive regimens are needed before use in clinical practice.

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