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PKCι counteracts oxidative stress by regulating Hsc70 in an esophageal cancer cell line.


ABSTRACT: Using a glutathione S-transferase pull-down liquid chromatography-coupled tandem mass spectrometry approach and immunoprecipitation/immunoblot analysis, we found that heat shock cognate protein 70 (Hsc70) was involved in the complex formed by atypical protein kinase Cι (PKCι) and LC3 in the esophageal cancer cell line KYSE30. Further study indicated that Hsc70 was targeted by autophagic degradation, and knockdown of PKCι down-regulated Hsc70 by promoting autophagy. PKCι knockdown sensitized cells to oxidative stress-induced apoptosis, whereas forced PKCι expression counteracted the oxidative stress-induced apoptosis via Hsc70.

SUBMITTER: Wang BS 

PROVIDER: S-EPMC3631091 | biostudies-literature | 2013 May

REPOSITORIES: biostudies-literature

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PKCι counteracts oxidative stress by regulating Hsc70 in an esophageal cancer cell line.

Wang Bo-Shi BS   Yang Yang Y   Yang Hai H   Liu Yi-Zhen YZ   Hao Jia-Jie JJ   Zhang Yu Y   Shi Zhi-Zhou ZZ   Jia Xue-Mei XM   Zhan Qi-Min QM   Wang Ming-Rong MR  

Cell stress & chaperones 20121209 3


Using a glutathione S-transferase pull-down liquid chromatography-coupled tandem mass spectrometry approach and immunoprecipitation/immunoblot analysis, we found that heat shock cognate protein 70 (Hsc70) was involved in the complex formed by atypical protein kinase Cι (PKCι) and LC3 in the esophageal cancer cell line KYSE30. Further study indicated that Hsc70 was targeted by autophagic degradation, and knockdown of PKCι down-regulated Hsc70 by promoting autophagy. PKCι knockdown sensitized cell  ...[more]

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