Mitochondrial potassium channel Kv1.3 mediates Bax-induced apoptosis in lymphocytes.

  title={Mitochondrial potassium channel Kv1.3 mediates Bax-induced apoptosis in lymphocytes.},
  author={Ildik{\`o} Szab{\`o} and J{\"u}rgen Bock and Heike Grassm{\'e} and Matthias Soddemann and Barbara Wilker and Florian Lang and Mario Zoratti and Erich Gulbins},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={105 39},
The potassium channel Kv1.3 has recently been located to the inner mitochondrial membrane of lymphocytes. Here, we show that mouse and human cells either genetically deficient in Kv1.3 or transfected with siRNA to suppress Kv1.3-expression resisted apoptosis induced by several stimuli, including Bax over-expression [corrected]. Retransfection of either Kv1.3 or a mitochondrial-targeted Kv1.3 restored cell death . Bax interacted with and functionally inhibited mitochondrial Kv1.3. Incubation of… CONTINUE READING


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