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首页> 外文期刊>Immunity >Apoptosis-Inducing-Factor-Dependent Mitochondrial Function Is Required for T Cell but Not B Cell Function
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Apoptosis-Inducing-Factor-Dependent Mitochondrial Function Is Required for T Cell but Not B Cell Function

机译:T细胞需要凋亡诱导因子依赖的线粒体功能,而B细胞则不需要

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The role of apoptosis inducing factor (AIF) in promoting cell death versus survival remains controversial. We report that the loss of AIF in fibroblasts led to mitochondrial electron transport chain defects and loss of proliferation that could be restored by ectopic expression of the yeast NADH dehydrogenase Ndi1. Aif-deficiency in T cells led to decreased peripheral T cell numbers and defective homeostatic proliferation, but thymic T cell development was unaffected. In contrast, Aif-deficient B cells developed and functioned normally. The difference in the dependency of T cells versus B cells on AIF for function and survival correlated with their metabolic requirements. Ectopic Ndi1 expression rescued homeostatic proliferation of Aif-deficient T cells. Despite its reported roles in cell death, fibroblasts, thymocytes and B cells lacking AIF underwent normal death. These studies suggest that the primary role of AIF relates to complex I function, with differential effects on T and B cells.
机译:凋亡诱导因子(AIF)在促进细胞死亡与存活中的作用仍存在争议。我们报告说,成纤维细胞中AIF的损失导致线粒体电子运输链缺陷和增殖的损失,可以通过酵母NADH脱氢酶Ndi1的异位表达来恢复。 T细胞中的Aif缺乏导致外周T细胞数量减少和稳态增殖缺陷,但胸腺T细胞发育未受影响。相反,缺乏Aif的B细胞发育正常。 T细胞与B细胞对AIF的功能和生存依赖性的差异与其代谢需求相关。异位Ndi1表达挽救了Aif缺陷T细胞的稳态增殖。尽管据报道其在细胞死亡中起作用,但缺乏AIF的成纤维细胞,胸腺细胞和B细胞却正常死亡。这些研究表明,AIF的主要作用与复杂的I功能有关,对T细胞和B细胞具有不同的作用。

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