The VDAC2-BAK rheostat controls thymocyte survival.
The VDAC2-BAK rheostat controls thymocyte survival.
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DOI:
10.1126/scisignal.2000274
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发表时间:
2009-08-25
影响因子:
7.3
通讯作者:
Cheng EH
中科院分区:
文献类型:
--
作者:
Ren D;Kim H;Tu HC;Westergard TD;Fisher JK;Rubens JA;Korsmeyer SJ;Hsieh JJ;Cheng EH
The proapoptotic proteins BAX and BAK constitute the mitochondrial apoptotic gateway that executes cellular demise after integrating death signals. The lethal BAK is kept in check by voltage-dependent anion channel 2 (VDAC2), a mammalian-restricted VDAC isoform. Here, we provide evidence showing a critical role for the VADC2-BAK complex in determining thymocyte survival in vivo. Genetic depletion of Vdac2 in the thymus resulted in excessive cell death and hypersensitivity to diverse death stimuli including engagement of the T cell receptor. These phenotypes were completely rescued by the concurrent deletion of Bak but not that of Bax. Thus, the VDAC2-BAK axis provides a mechanism that governs the homeostasis of thymocytes. Our study reveals a sophisticated built-in rheostat that likely fine-tunes immune competence to balance autoimmunity and immunodeficiency.
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影响因子:
50.3
作者:
Certo, Michael;Moore, Victoria Del Gaizo;Letai, Anthony
通讯作者:
Letai, Anthony
影响因子:
16
作者:
Cheng, EHYA;Wei, MC;Korsmeyer, SJ
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Korsmeyer, SJ
影响因子:
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KNUDSON, CM;TUNG, KSK;KORSMEYER, SJ
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KORSMEYER, SJ
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NAKAYAMA, T;UEDA, Y;JUNE, CH
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JUNE, CH
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56.9
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Cheng, EHY;Sheiko, TV;Korsmeyer, SJ
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Korsmeyer, SJ