Abstract
            Introduction: Immunological monitoring could indirectly measure the suppressive effects of the  drugs and provide early guidance on necessary preventive interventions in transplant recipients.  
  Objectives: Our goal was to determine whether mycophenolic acid (MPA) modulates peripheral  blood lymphocyte T in kidney transplant recipients.  
  Patients and Methods: We assessed T lymphocytes CD3, CD4 and CD8 in peripheral blood in 30  donors and 35 recipients one day before and 10 days after transplantation using Becton Dickinson’s  direct immune fluorescent light.  
  Results: Comparisons showed that the number of T lymphocytes CD3+, CD4+, CD8+ in peripheral  blood of transplant recipients were lower than donors (TCD3 was 1690.31±503.45 versus  2280.73± 522.48; TCD4 was 549.51 ±211.72 cell/µL versus 766.37± 341.72 cell/µL and CD8 was  1134.37 ±431.07 cell/µL versus 1523.4± 349.23 cell/µL with P<0.001; P=0.001 and P= 0.0002  respectively). Additionally, post-transplantation lymphocytes TCD4 decreased in 10/35 of recipients  and increased in 22/35 of recipients (P=0.036).  
  Conclusion: The T lymphocytes CD3, CD4 and CD8 in peripheral blood should be monitored at  multiple post-transplant times to make early predictions of transplant rejection during follow-up  treatment.