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Updated: Feb 7, 2026

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Telomerase-Mediated Strategy for Overcoming Non-Small Cell Lung Cancer Targeted Therapy and Chemotherapy Resistance

Ilgen Mender1, Ryan LaRanger1, Krishna Luitel1

  • 1Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.

Neoplasia (New York, N.Y.)
|July 18, 2018
PubMed

Insights

A novel cancer drug, 6-thio-2'-deoxyguanosine (6-thio-dG), effectively targets drug-resistant non-small cell lung cancer. This telomerase substrate shows promise in prolonging disease control with minimal toxicity in preclinical models.

Area of Science:

  • Oncology
  • Molecular Biology
  • Drug Discovery

Background:

  • Standard and targeted cancer therapies often fail in late-stage cancer due to tumor heterogeneity and drug resistance.
  • Non-small cell lung cancer (NSCLC) frequently develops resistance to EGFR-inhibitors and conventional chemotherapy.

Purpose of the Study:

  • To evaluate the efficacy of 6-thio-2 -deoxyguanosine (6-thio-dG) as a therapeutic agent against EGFR-inhibitor and chemotherapy-resistant NSCLC.
  • To investigate the potential of 6-thio-dG to overcome drug resistance in lung cancer models.

Main Methods:

  • Utilized colony formation assays to assess cell survival and proliferation.
  • Employed human xenograft models to evaluate 6-thio-dG efficacy in vivo.
  • Tested 6-thio-dG in syngeneic and genetically engineered immune-competent mouse models of lung cancer.

Main Results:

  • 6-thio-dG demonstrated significant sensitivity in erlotinib-, paclitaxel/carboplatin-, and gemcitabine/cisplatin-resistant NSCLC cells in vitro.
  • Preclinical mouse models confirmed the efficacy of 6-thio-dG against resistant lung cancer cells.
  • Observed minimal toxicities associated with 6-thio-dG treatment.

Conclusions:

  • 6-thio-dG is a potent therapeutic candidate for overcoming drug resistance in NSCLC.
  • This telomerase substrate offers a potential strategy to extend disease control in therapy-resistant lung cancer patients.
  • 6-thio-dG represents a promising novel approach with a known mechanism and favorable toxicity profile.

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