This study aims to investigate the dynamics of Angiotensin II Type 1 Receptor Antibodies (AT1R-Ab) before and after kidney transplantation. The purpose is to understand how changes in AT1R-Ab levels may impact post-transplant kidney function and graft survival. Participants will include kidney transplant recipients, and their AT1R-Ab levels will be monitored over a one-year period. This research may help develop better predictive models for transplant outcomes, improving clinical decision-making for transplant physicians.

The study will be conducted as a prospective cohort study involving kidney transplant recipients. The participants will undergo monitoring of their AT1R-Ab levels at multiple time points before and after the transplantation, including 2 weeks, 3 months, and 1 year post-transplant. Data collected will include clinical information such as kidney function tests, graft survival rates, and post-transplant complications. The study will aim to correlate AT1R-Ab dynamics with clinical outcomes such as delayed graft function (DGF), graft loss, and creatinine levels.

Inclusion Criteria:

Eligible patients were those who had serum samples collected at pre-transplant and at 2 weeks, 3 months, and 1-year post-transplant, with a minimum follow-up of 1 year

Exclusion Criteria:

Exclusion criteria were simultaneous multi-organ transplantation and age younger than 18 years.

This study was conducted at tertiary academic transplant center in South Korea and included kidney transplant recipients between 2016 and 2022. Eligible patients were those who had serum samples collected at pre-transplant and at 2 weeks, 3 months, and 1-year post-transplant, with a minimum follow-up of 1 year. Exclusion criteria were simultaneous multi-organ transplantation and age younger than 18 years. Among the 1,118 patients who underwent kidney transplantation during this period, 768 were excluded because they did not have at least four serum samples stored in the Seoul National University Hospital Biobank within 1 year after transplantation. Of the remaining 350 patients with four or more stored samples, 106 were excluded due to the absence of required time-point samples (pre-transplant and 2-week, 3-month, and 1-year post-transplant), and an additional 3 patients were excluded due to missing data for studied parameters. Consequently, a total of 241 patients were included.