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Foxp3 Positive?Regulatory T Cells and Kidney Allograft Tolerance #MMPMID28049555
Alessandrini A; Turka LA
Am J Kidney Dis 2017[May]; 69 (5): 667-74 PMID28049555show ga
Normal immune homeostasis is achieved by several mechanisms, and prominent among them is immunoregulation. While several types of regulatory lymphocyte populations have been described, CD4 T cells expressing the Foxp3 transcription factor (Foxp3+ Tregs) are the best understood. This population of cells is critical for maintaining self-tolerance throughout the life of the organism. Foxp3+ Tregs can develop within the thymus, but also, under selected circumstances, naïve peripheral T cells can be induced to express Foxp3 and become stable Tregs as well. Abundant evidence from animal systems, as well as limited evidence in humans, implicates Tregs in transplant tolerance, although whether these Tregs recognize alloantigens or self-antigens is not clear. New translational approaches to promote immunosuppression minimization and/or actual tolerance are being designed to exploit these observations. These include strategies to boost the generation, maintainence and stability of endogenous Tregs, as well as adoptive cellular therapy with exogenous Tregs.