PV-nephropathy is a rare but serious complication after renal transplantation. A small group of patients under intensive immunosuppression comprising tacrolimus in combination with mycophenolate mofetil has a significantly increased risk of acquiring this deleterious complication.
Abstract. Recent studies have demonstrated an integration of recipient-derived progenitor cells into solid allografts with differentiation into parenchymal cells. Whether or to what extent this phenomenon influences allograft outcome has still to be elucidated. To detect epithelial chimerism tubular cells were harvested from sequential renal allograft biopsy samples by laser microdissection in 36 patients. Recipient-derived cells were detected by short-tandem repeat-based genotyping. In cases with gender-mismatched transplantation, chimerism was semiquantitatively evaluated by in situ hybridization for the Y-chromosome. Findings were correlated to different pathomechanisms of epithelial injury as well as to morphologic and clinical outcome. Epithelial chimerism was detectable as early as 8 d after transplantation and lasted for 8 yr.
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