Cleaving Beclin 1 to suppress autophagy in chemotherapy-induced apoptosis

Hua Li, Peng Wang, Jian Yu, Lin Zhang

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Autophagy is often found in apoptosis-defective cancer cells and contributes to chemotherapy resistance. However, it is far from clear how the coordination of apoptosis and autophagy determines sensitivity of cancer cells to chemotherapy. Our recent study showed that Beclin 1, a key regulator of autophagy, is cleaved by caspase 8 at the execution stage of chemotherapy-induced and mitochondria-mediated apoptosis. Perturbation of Beclin 1 cleavage, by knock-in of a mutation, phenocopies the autophagy observed in apoptosis-defective cancer cells, and renders chemotherapy resistance in vitro and in vivo. These results demonstrate an important role of caspases in suppressing autophagy by cleaving autophagic machinery.

Original languageEnglish
Pages (from-to)1239-1241
Number of pages3
Issue number10
StatePublished - Oct 2011
Externally publishedYes


  • Apoptosis
  • Autophagy
  • Beclin 1
  • Caspase 8
  • Chemotherapy


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