Transplantation
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Delayed graft function (DGF) has been identified as one of the principal correlates of poor graft survival in cadaveric renal transplantation. However, its risk factors and clinical predictors have been poorly elucidated. ⋯ Our findings suggest that the quality of the transplanted organ and the occurrence of DGF are strictly related to each other and can influence graft function through apparently nonimmune mechanisms. In addition, long-standing donor hypertension is a strong independent variable affecting both DGF and graft function of suboptimal cadaveric kidneys, at least up to 1 year.
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Randomized Controlled Trial Comparative Study Clinical Trial
The role of tacrolimus (FK506)-based immunosuppression on bone mineral density and bone turnover after cardiac transplantation: a prospective, longitudinal, randomized, double-blind trial with calcitriol.
Tacrolimus (FK506) is a new immunosuppressive drug in organ transplantation that has demonstrated experimentally to be more deleterious on bone mineral metabolism than cyclosporine. The purpose of this clinical study was to evaluate the effects of a tacrolimus-based immunosuppression on the skeleton and to investigate in a prospective, longitudinal, randomized, double-blind, study the effect of 0.25 microg calcitriol (1,25-dihydroxyvitamin D3) versus placebo in the prevention of bone loss and fracture rate after heart transplantion (HTx). ⋯ High dose tacrolimus-based immunosuppressive regimen is associated with a rapid bone loss early after cardiac transplantation. Beyond the first 6 months after HTx, calcium, vitamin D, and hormone supplementation in hypogonadism lead sufficiently to bone mineral recovery. Besides immunosuppression, both concomitant hypogonadism and secondary hyperparathyroidism play a major role for the bone loss and should be therefore monitored and treated adequately. Low dose calcitriol should be substituted for at least 2 years as additional antiresorptive therapy.
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Comparative Study
Interleukin-1 receptor antagonist as a biomarker for bronchiolitis obliterans syndrome in lung transplant recipients.
The major limitation to survival after lung transplantation is bronchiolitis obliterative syndrome (BOS). BOS is a chronic inflammatory/immunologic process characterized by fibroproliferation, matrix deposition, and obliteration of the airways. The mechanism(s) that lead to fibro-obliteration of allograft airways have not been fully elucidated. Interleukin-1 receptor antagonist (IL-1Ra) is a naturally occurring antagonist of the pro-inflammatory cytokine IL-1 and has been associated with a number of fibroproliferative diseases. ⋯ These findings suggest that elevated levels of IL-1Ra may be attenuating IL-1 bioactivity during the pathogenesis of BOS and creating a local environment that favors fibroproliferation and matrix deposition.