Probst-Kepper Michael, Kröger Andrea, Garritsen Henk S P, Buer Jan
Institut für Mikrobiologie, Immunologie und Krankenhaushygiene, Braunschweig, Germany.
Transfus Med Hemother. 2009;36(5):302-308. doi: 10.1159/000235929. Epub 2009 Sep 10.
Adoptive transfer in animal models clearly indicate an essential role of CD4+ CD25+ FOXP3+ regulatory T (T(reg)) cells in prevention and treatment of autoimmune and graft-versus-host disease. Thus, T(reg) cell therapies and development of drugs that specifically enhance T(reg) cell function and development represent promising tools to establish dominant tolerance. So far, lack of specific markers to differentiate human T(reg) cells from activated CD4+ CD25+ effector T cells, which also express FOXP3 at different levels, hampered such an approach. Recent identification of the orphan receptor glycoprotein-A repetitions predominant (GARP or LRRC32) as T(reg) cell-specific key molecule that dominantly controls FOXP3 via a positive feedback loop opens up new perspectives for molecular and cellular therapies. This brief review focuses on the role of GARP as a safeguard of a complex regulatory network of human T(reg) cells and its implications for regulatory T cell therapies in autoimmunity and graft-versus-host disease.
动物模型中的过继转移清楚地表明,CD4+ CD25+ FOXP3+调节性T(T(reg))细胞在自身免疫性疾病以及移植物抗宿主病的预防和治疗中发挥着重要作用。因此,T(reg)细胞疗法以及开发能特异性增强T(reg)细胞功能和发育的药物是建立显性耐受的有前景的工具。到目前为止,由于缺乏能将人类T(reg)细胞与活化的CD4+ CD25+效应T细胞区分开来的特异性标志物(这些效应T细胞也在不同水平表达FOXP3),阻碍了这种方法的应用。最近发现孤儿受体糖蛋白A重复序列优势分子(GARP或LRRC32)作为T(reg)细胞特异性关键分子,通过正反馈回路主导性地控制FOXP3,这为分子和细胞疗法开辟了新的前景。这篇简短的综述聚焦于GARP作为人类T(reg)细胞复杂调节网络的一种保障所发挥的作用及其对自身免疫性疾病和移植物抗宿主病中调节性T细胞疗法的意义。