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Implications of MicroRNAs in the Treatment of Gefitinib-Resistant Non-Small Cell Lung Cancer

Thomas K Sin1,2, Fengfeng Wang3, Fei Meng4

  • 1Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. Ka.Wai.Thomas.Sin@uth.tmc.edu.

International Journal of Molecular Sciences
|February 19, 2016
PubMed

Insights

MicroRNAs (miRNAs) can restore sensitivity to epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) in non-small cell lung cancer (NSCLC). Manipulating miRNA levels shows promise in overcoming acquired resistance to targeted therapies like gefitinib.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Non-small cell lung cancer (NSCLC) accounts for 85% of lung cancer cases.
  • Acquired resistance to epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs) like gefitinib is a significant clinical challenge.
  • Restoring sensitivity to EGFR-TKIs is crucial for improving patient outcomes.

Purpose of the Study:

  • To explore the therapeutic potential of microRNAs (miRNAs) in overcoming acquired resistance to EGFR-TKIs.
  • To investigate how miRNA manipulation can re-sensitize tumors to gefitinib treatment.
  • To review the role of miRNAs in EGFR-TKI resistance mechanisms and potential therapeutic strategies.

Main Methods:

  • Reviewing existing literature on miRNA function and EGFR-TKI resistance.
  • Analyzing studies on miRNA mimetics and their effect on EGFR signaling pathways.
  • Examining in vitro and in vivo models of gefitinib resistance.
  • Correlating miRNA expression profiles with clinical drug response and survival data.

Main Results:

  • miRNA manipulation can attenuate the EGFR/PI3K/Akt signaling pathway.
  • Restoration of gefitinib-induced apoptosis and tumor regression observed in preclinical models.
  • Differential miRNA expression in tumors and blood correlates with drug response and survival.
  • Natural compounds' chemopreventive effects may involve miRNA modulation.

Conclusions:

  • MicroRNA mimetics offer a promising strategy to overcome acquired resistance to EGFR-TKIs in NSCLC.
  • Targeting miRNA pathways can re-sensitize tumors to gefitinib and enhance therapeutic efficacy.
  • miRNA-based therapies hold potential for improving treatment outcomes in NSCLC patients resistant to targeted drugs.
Keywords:
EGFRgefitinibmiRNAnon-small cell lung cancerresistance

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