Immunosuppressive strategy with 50 % reduction of Advagraf® daily dose at M4 (randomization) and unchanged MMF dose. Targeted tacrolimus trough level are to be higher than 3 ng/mL . If the dose is not in adequation with the dispensable units, the prescribed dose will be the closest higher dose.

Drug: Tacrolimus targeted half-dose

Immunosuppressive strategy will remain identical after randomization (M4): unchanged Advagraf® and MMF doses. Targeted tacrolimus trough level are to be between 7 and 12 ng/mL Drug: Tacrolimus targeted plain dose

Evaluate the aorta stiffness at 1 year post-renal transplantation and its evolution in patients who received a half reduction of their daily dose of Advagraf ® 4 months after transplantation compared with patients whose dose has not been divided.

Evaluate peripheral and central blood pressures, the impact of reflected pressure waves and coupling cardiocirculatory (on the functional plan) and evaluate endothelial activation, factors promoting the vascular fibrosis and oxidant stress level (on biological plan) at 1 year post-renal transplantation and their evolution in patients who received a hal reduction of their daily dose Advagraf ® to four months of the transplant when compared with patients whose dose was not divided.