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Looking for Driver Pathways of Acquired Resistance to Targeted Therapy: Drug Resistant Subclone Generation and Sensitivity Restoring by Gene Knock-down
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Acquired resistance in oncogene-addicted non-small-cell lung cancer

Claudio Sini1, Alessandro Tuzi2, Giovanni Rossi3

  • 1Medical Oncology, Ospedale Giovanni Paolo II, Olbia, Italy.

Future Oncology (London, England)
|July 11, 2018
PubMed

Insights

Tyrosine kinase inhibitors offer temporary benefits for non-small cell lung cancer patients. Understanding acquired resistance mechanisms is crucial for developing durable treatments for EGFR and ALK-driven lung cancers.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Tyrosine kinase inhibitors (TKIs) have revolutionized non-small cell lung cancer (NSCLC) treatment for molecularly selected patients.
  • Despite initial efficacy, TKI therapy benefits are often transient, with most patients progressing within 12 months.
  • Acquired resistance, a complex phenomenon involving multiple molecular mechanisms, limits long-term TKI efficacy.

Purpose of the Study:

  • To provide a comprehensive overview of acquired resistance mechanisms in oncogene-addicted NSCLC.
  • To focus on resistance related to EGFR mutations and ALK translocations, the most studied targets.
  • To review the primary challenges encountered in clinical practice regarding TKI resistance.

Main Methods:

  • Literature review of studies on acquired resistance in NSCLC.
  • Analysis of molecular mechanisms underlying resistance to EGFR and ALK inhibitors.
  • Synthesis of clinical data on treatment outcomes and resistance patterns.

Main Results:

  • Acquired resistance to TKIs in NSCLC is a heterogeneous and multi-mechanistic process.
  • Specific resistance mechanisms vary depending on the targeted oncogene (e.g., EGFR, ALK).
  • Secondary resistance often emerges despite the development of more potent and selective inhibitors.

Conclusions:

  • Understanding diverse resistance mechanisms is essential for improving NSCLC treatment strategies.
  • Overcoming acquired resistance requires novel therapeutic approaches beyond current TKIs.
  • Addressing clinical challenges associated with resistance is critical for enhancing patient outcomes in NSCLC.
Keywords:
ALKEGFRNSCLCTKIacquired resistancelung canceroncogene addicted

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