Abstract
            Introduction: Cytomegalovirus (CMV) infection is a significant complication in kidney  transplant recipients, impacting graft function and overall patient outcomes. Aquaporin 5  (AQP5) is a transmembrane channel that regulates renal function and impacts important  mechanisms of immune cell migration and inflammation.  
  Objectives: This research aimed to evaluate the impact of AQP5 polymorphism (-1364A/C) on  the risk of CMV infection in kidney transplant recipients.  
  Patients and Methods: One-hundred kidney transplant recipients were included in this  study, divided into two groups; CMV+-positive (n=50) and CMV–  -negative (n=50) patients.  Additionally, a control group of 50 healthy individuals was included. The frequency of the AQP5  (-1364A/C) gene polymorphism was determined using the ARMS-PCR technique.  
  Results: About 26% and 16% of patients in the CMV+ and CMV-  groups experienced acute  rejection after renal transplantation, respectively (P=0.220). The CC genotype of AQP5  (-1364A/C) polymorphism was present in 8% (n=4) of CMV+ and 4% (n=2) of CMV-  recipients  (4%); however, it was not observed in the control group (P=0.354).  
  Conclusion: The results revealed that carrying at least one C-allele of the AQP5 1364A/C  polymorphism (AC or CC genotypes) does not have a significant association with the incidence  or presence of CMV infection in kidney transplant patients.