BACKGROUND: Induction therapy can improve kidney transplantation (KTx) outcomes, but little is known about the mechanisms underlying its effects. METHODS: The mRNA levels of T cell-related genes associated with tolerance or rejection (CD247, GZMB, PRF1, FOXP3, MAN1A1, TCAIM, and TLR5) and lymphocyte subpopulations were monitored prospectively in the peripheral blood of 60 kidney transplant recipients before and 7, 14, 21, 28, 60, 90 days, 6 months, and 12 months after KTx. Patients were treated with calcineurin inhibitor-based triple immunosuppression and induction with rabbit anti-thymocyte globulin (rATG, n = 24), basiliximab (n = 17), or without induction (no-induction, n = 19). A generalized linear mixed model with gamma distribution for repeated measures, adjusted for rejection, recipient/donor age and delayed graft function, was used for statistical analysis. RESULTS: rATG treatment caused an intense reduction in all T cell type population and natural killer (NK) cells within 7 days, then a slow increase and repopulation was observed. This was also noticed in the expression levels of CD247, FOXP3, GZMB, and PRF1. The basiliximab group exhibited higher CD247, GZMB, FOXP3 and TCAIM mRNA levels and regulatory T cell (Treg) counts than the no-induction group. The levels of MAN1A1 and TLR5 mRNA expressions were increased, whereas TCAIM decreased in the rATG group as compared with those in the no-induction group. CONCLUSION: The rATG induction therapy was associated with decreased T and NK cell-related transcript levels and with upregulation of two rejection-associated transcripts (MAN1A1 and TLR5) shortly after KTx. Basiliximab treatment was associated with increased absolute number of Treg cells, and increased level of FOXP3 and TCAIM expression.

Biomedical Centre Faculty of Medicine in Plzen Charles University Prague Plzen Czech Republic

Department of Clinical and Transplant Immunology Institute for Clinical and Experimental Medicine Prague Czech Republic

Department of Nephrology Transplant Centre Institute for Clinical and Experimental Medicine Videnska 1958 14021 Prague Czech Republic

Department of Preventive Cardiology Cardiology Centre Institute for Clinical and Experimental Medicine Prague Czech Republic

Institute of Medical Immunology and Berlin Brandenburg Centre for Regenerative Therapies Charité University Medicine Berlin Germany

Transplant Laboratory Centre for Experimental Medicine Institute for Clinical and Experimental Medicine Prague Czech Republic

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