CD45RC Expression of Circulating CD8+ T Cells Predicts Acute Allograft Rejection: A Cohort Study of 128 Kidney Transplant Patients

Abstract : Predictive biomarkers of acute rejection (AR) are lacking. Pre-transplant expression of CD45RC on blood CD8 + T cells has been shown to predict AR in kidney transplant (KT) patients. The objective of the present study was to study CD45RC expression in a large cohort of KT recipients exposed to modern immunosuppressive regimens. CD45RC expression on T cells was analyzed in 128 KT patients, where 31 patients developed AR, of which 24 were found to be T-cell mediated (TCMR). Pre-transplant CD4 + and CD8 + CR45RC high T cell proportions were significantly higher in patients with AR. The frequency of CD45RC high T cells was significantly associated with age at transplantation but was not significantly different according to gender, history of transplantation, pre-transplant immunization, and de novo donor specific anti-Human Leucocyte Antigen (HLA) antibody. Survival-free AR was significantly better in patients with CD8 + CD45RC high T cells below 58.4% (p = 0.0005), but not different according to CD4 + T cells (p = 0.073). According to multivariate analysis, CD8 + CD45RC high T cells above 58.4% increased the risk of AR 4-fold (HR 3.96, p = 0.003). Thus, pre-transplant CD45RC expression on CD8 + T cells predicted AR, mainly TCMR, in KT patients under modern immunosuppressive therapies. We suggest that CD45RC expression should be evaluated in a prospective study to validate its usefulness to quantify the pre-transplant risk of AR.
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Marie Lemerle, Anne-Sophie Garnier, Martin Planchais, Benoit Brilland, Yves Delneste, et al.. CD45RC Expression of Circulating CD8+ T Cells Predicts Acute Allograft Rejection: A Cohort Study of 128 Kidney Transplant Patients. Journal of Clinical Medicine Research, Elmer Press, 2019, 8 (8), pp.1147. ⟨10.3390/jcm8081147⟩. ⟨inserm-02265791⟩

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