Recovery from post-renal transplant lymphopenia predicts graft function and survival

Area of Science:

• Nephrology
• Immunology
• Transplantation Science

Background:

• Renal transplantation is the optimal treatment for end-stage renal disease.
• Early detection of graft dysfunction is crucial for improving patient outcomes.
• Lymphocytes are critical in immune responses and transplant rejection, with counts affected by surgery and immunosuppression.

Purpose of the Study:

• To investigate the association between early postoperative lymphocyte trends and clinical outcomes in renal transplant recipients.
• To identify lymphocyte count thresholds and recovery patterns as potential biomarkers for graft prognosis.

Main Methods:

• Retrospective analysis of prospectively collected data from 376 adult renal transplant recipients (2015-2023).
• Monitoring of lymphocyte counts, focusing on nadir and recovery on post-operative days (POD) 3 and 5.
• Multivariable analysis to assess the relationship between lymphocyte trends and acute rejection, delayed graft function, and graft failure.

Main Results:

• Lymphopenia was common post-transplant, with nadir on POD 3 and recovery by POD 5.
• POD 5 lymphocyte count < 0.5x10^9 cells/L correlated with increased odds of acute rejection (OR=2.97, p=0.037).
• Rapid POD 3-5 recovery predicted lower odds of delayed graft function (OR=0.38, p=0.047), while delayed POD 3-4 recovery indicated higher 3-year graft failure risk (OR=5.23, p=0.025).

Conclusions:

• Early postoperative lymphocyte dynamics are valuable indicators of renal graft health.
• Lymphocyte count nadir and recovery rates serve as accessible biomarkers for predicting acute rejection, graft function, and long-term graft survival.
• Monitoring lymphocyte trends offers a potential strategy for personalized post-transplant management.