A comparison between cyclosporine and tacrolimus-based immunosuppression for renal allografts: renal function and blood pressure after 5 years.

The choice of initial immunosuppressive therapy (IST) following solid organ transplant remains a source of some controversy. Cyclosporine A (CsA) has been the basis of most IST protocols over the past two decades but has recently been supplanted in many centers by the use of tacrolimus (TAC)-based protocols. Renal allograft recipients in London may receive either CsA or TAC based IST, along with prednisone and azathioprine or (since 1999) mycophenolate mofetil (MMF). The decision is based on criteria such as age, gender, diabetic status, and lipid levels, which are felt to be impacted by the delivery of CsA or TAC based IST. The present analysis focuses on the results of BP and renal function in renal transplant patients receiving CsA or TAC based initial therapy during the period January 1, 1996 to June 30, 2002. Patients receiving TAC based IST were significantly younger than those receiving CsA (44 ± 13.9 vs 50.5 ± 12.3 years; P < .004). Mean arterial pressure (MAP) was lower in the TAC patients at 1 month (97.8 ± 13.1 vs 103.2 ± 11.8 mm Hg; P = .035), but became equivalent to CsA-treated patients for the balance of the follow-up period of up to 60 m. Serum creatinine was not significantly different between groups at any time during up to 60 months of follow-up. Based on these results, it seems apparent that the choice of calcineurin inhibitor may not influence renal function or blood pressure in long-term renal allograft survivors.