Risk Factors of Chinese Kidney Transplant Recipients DSA Based on MPA Immunosuppressive Regimen

Inclusion Criteria: * Male or female kidney transplant recipients from 18 to 65 years of age (including 18 \& 65 years old patients) * Single organ and first kidney transplant recipients from donation after citizen's death * Patients who received MMF+TAC+ Corticosteroids immunosuppressive regimen as first choice post transplantation * Pre-transplant PRA is negative (0%) * One serum pregnancy test with a sensitivity of at least 25mlU/Ml for patients of childbearing potential before enrolled. A second test should be performed 8-10 days later. Repeat pregnancy tests should be performed during routine follow-up visits. Results of all pregnancy tests should be discussed with the patient. Patients should be instructed to consult their physician immediately should pregnancy occur. For patients to be included in the study, negative result must be obtained. And highly effective contraception for women of childbearing potential. Contraception must be taken before beginning study drug therapy, during therapy and for 6 weeks after the last dose of study medication Exclusion criteria: * Patients who do not receive MMF * Patients who are re-transplantation or multiple organ transplantation recipients * Female patients who are pregnant or lactating * Patients who have any form of substance abuse, psychological illness or any other condition, which, in the opinion of the investigator, may interfere with the patient's ability to understand the requirements of the study. * Patients who woul…