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J Thorac Cardiovasc Surg. 1997 Feb;113(2):335-40; discussion 340-1.

Treatment of refractory acute allograft rejection with aerosolized cyclosporine in lung transplant recipients.

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Department of Surgery, University of Pittsburgh, Pa., USA.


Lung transplant recipients who have persistent acute cellular rejection are at increased risk for the development of chronic rejection, the leading cause of reduced long-term survival. This study evaluated the use of aerosolized cyclosporine as rescue therapy for unremitting acute rejection. Between June 1993 and March 1996, 18 patients with rejection that failed to resolve after therapy with pulse steroids and antilymphocyte globulin were enrolled in the study. Aerosolized cyclosporine A (300 mg) treatment was initiated for 10 consecutive days followed by a maintenance regimen of 3 days per week. Efficacy was assessed by graft histologic and pulmonary function testing. With the use of linear regression, results in these patients were compared with those in 23 control patients, matched for histologic acute rejection, who had continued to receive conventional rescue therapy. Two patients were unable to tolerate the treatments and were withdrawn from the study. Significant improvement in histologic rejection occurred in 14 of the remaining 16 patients after a mean of 37 days of aerosolized cyclosporine therapy. Measures of forced vital capacity and forced expiratory volume in 1 second (change in percent predicted/100 days plus or minus the standard error) increased over time in the treated patients whereas the condition of control patients declined despite repeated attempts at conventional rescue (forced vital capacity, aerosolized cyclosporine group, 4.6 +/- 2.9 vs control group -8.1 +/- 1.9, p = 0.001; forced expiratory volume in 1 second, aerosolized cyclosporine group, 2.1 +/- 4.4 vs control group -9.8 +/- 2.6, p = 0.043). Renal and hepatic toxicity during cyclosporine therapy was not observed. The incidence of acute histologic rejection (> or = A2) decreased from 2.49 +/- 0.68 episodes/100 days before aerosolized cyclosporine therapy to 0.72 +/- 0.3 episodes/100 days (p < 0.05). In summary, aerosolized cyclosporine is a safe and effective therapy for acute rejection that has failed to improve with conventional treatment.

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