Molecular medicine (Cambridge, Mass.) · 2012
Preserving the B-cell compartment favors operational tolerance in human renal transplantation.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Silva Hernandez M, Takenaka Maisa C S, Moraes-Vieira Pedro M M, Monteiro Sandra M, Hernandez Maristela O, Chaara Wahiba, Six Adrien, Agena Fabiana, Sesterheim Patrícia, Barbé-Tuana Florencia Maria, Saitovitch David, Lemos Francine, Kalil Jorge, Coelho Verônica
Аннотация
Transplanted individuals in operational tolerance (OT) maintain long-term stable graft function after completely stopping immunosuppression. Understanding the mechanisms involved in OT can provide valuable information about pathways to human transplantation tolerance. Here we report that operationally tolerant individuals display quantitative and functional preservation of the B-cell compartment in renal transplantation. OT exhibited normal numbers of circulating total B cells, naive, memory and regulatory B cells (Bregs) as well as preserved B-cell receptor repertoire, similar to healthy individuals. In addition, OT also displayed conserved capacity to activate the cluster of differentiation 40 (CD40)/signal transducer and activator of transcription 3 (STAT3) signaling pathway in Bregs, in contrast, with chronic rejection. Rather than expansion or higher activation, we show that the preservation of the B-cell compartment favors OT.