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Short interfering RNA directed against TWIST, a novel zinc finger transcription factor, increases A549 cell

Wen-Lei Zhuo1, Yan Wang, Xian-Lu Zhuo

  • 1Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China.

Biochemical and Biophysical Research Communications
|March 12, 2008
PubMed

Insights

Suppressing TWIST (a transcription factor) increases lung cancer cell sensitivity to cisplatin chemotherapy. This suggests TWIST depletion may be a promising therapeutic strategy for lung cancer treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Epithelial-mesenchymal transition (EMT) is linked to cancer development.
  • TWIST, a transcription factor, is implicated in inducing EMT and tumorigenicity.
  • The role of TWIST suppression in enhancing cancer cell chemosensitivity is not well understood.

Purpose of the Study:

  • To investigate whether TWIST suppression can increase the chemosensitivity of A549 lung cancer cells to cisplatin.
  • To explore the underlying molecular pathways, including MAPKs and mitochondrial pathways, affected by TWIST depletion.

Main Methods:

  • Utilized RNA interference (RNAi) to knockdown TWIST expression in A549 cells.
  • Assessed cell viability and apoptosis following TWIST knockdown and cisplatin treatment.
  • Analyzed the activation status of MAPK pathways (JNK, ERK, p-38) and mitochondrial pathways.

Main Results:

  • TWIST depletion significantly sensitized A549 cells to cisplatin.
  • Cisplatin-induced cell death was mediated by the activation of the JNK/mitochondrial pathway.
  • ERK and p-38 pathways were not significantly activated in response to TWIST suppression and cisplatin.

Conclusions:

  • TWIST plays a critical role in A549 cell chemoresistance to cisplatin.
  • TWIST depletion enhances chemosensitivity by activating the JNK/mitochondrial pathway.
  • Targeting TWIST represents a potential therapeutic strategy for improving lung cancer treatment outcomes.

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