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Endobronchial Ultrasound-guided Intratumoral Injection of Cisplatin for the Treatment of Isolated Mediastinal Recurrence of Lung Cancer
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Endobronchial Ultrasound-guided Intratumoral Injection of Cisplatin for the Treatment of Isolated Mediastinal Recurrence of Lung Cancer

Published on: February 12, 2017

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CNOT3 contributes to cisplatin resistance in lung cancer through inhibiting RIPK3 expression

Lin Jing1,2, Meng-En Zhai3, Jian Cui1,2

  • 1National Translational Science Center for Molecular Medicine, Xi'an, 710032, China.

Apoptosis : an International Journal on Programmed Cell Death
|June 10, 2019
PubMed

Insights

CCR4-NOT transcription complex subunit 3 (CNOT3) is upregulated in lung cancer and linked to poor prognosis. Reducing CNOT3 sensitizes cancer cells to chemotherapy by increasing RIPK3, offering a new therapeutic target.

Area of Science:

  • Molecular oncology
  • Cancer epigenetics
  • Chemotherapy resistance mechanisms

Background:

  • Chemotherapeutic resistance leads to poor patient outcomes.
  • CNOT3's role in cancer progression is known, but its link to drug resistance is unclear.
  • Understanding resistance mechanisms is crucial for effective cancer therapy.

Purpose of the Study:

  • To investigate the role of CNOT3 in chemotherapeutic resistance in lung cancer.
  • To explore CNOT3's impact on cisplatin resistance and patient prognosis.
  • To identify CNOT3 as a potential therapeutic target for lung cancer.

Main Methods:

  • Analysis of CNOT3 mRNA expression in lung cancer tissues using the Oncomine database.
  • Examination of CNOT3 and RIPK3 expression in normal and lung cancer tissues, and in cisplatin-resistant A549 cells.
  • Knockdown of CNOT3 in A549/DDP cells to assess chemosensitization and apoptosis induction.
  • Investigation of RIPK3 and Caspase 8 activation following CNOT3 depletion.

Main Results:

  • CNOT3 mRNA was upregulated in lung cancer tissues and associated with poor prognosis.
  • Higher CNOT3 and lower RIPK3 expression were observed in cisplatin-resistant A549/DDP cells.
  • CNOT3 knockdown sensitized A549/DDP cells to cisplatin, enhancing apoptosis.
  • CNOT3 depletion increased RIPK3 expression, which mediated apoptosis via Caspase 8 activation.

Conclusions:

  • CNOT3 plays a significant role in cisplatin resistance in lung cancer.
  • Elevated CNOT3 expression contributes to poor prognosis in lung cancer patients.
  • Targeting CNOT3 may represent a novel therapeutic strategy to overcome cisplatin resistance in lung cancer.
Keywords:
ApoptosisCNOT3Cisplatin resistanceLung cancerRIPK3

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