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Collapsing the Tumor Ecosystem: Preventing Adaptive Response to Treatment by Inhibiting Transcription

Alessandro Carugo1, Giulio F Draetta2

  • 1Center for Co-Clinical Trials, The University of Texas MD Anderson Cancer Center, Houston, Texas.

Cancer Discovery
|January 10, 2018
PubMed

Insights

Cancer drug resistance emerges from genetic changes. A dual CDK7/12 inhibitor, THZ1, effectively targets drug-tolerant cells by disrupting their transcriptional machinery, preventing survival during therapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Therapeutics

Background:

  • Cancer therapies often trigger adaptive resistance through epigenetic and genetic events.
  • Tumor heterogeneity allows a dominant cell population to survive initial treatment.

Purpose of the Study:

  • To investigate novel therapeutic strategies targeting drug-tolerant cancer cells.
  • To identify vulnerabilities in cancer cell adaptation mechanisms.

Main Methods:

  • Utilized THZ1, a dual Cyclin-Dependent Kinase (CDK) 7/12 inhibitor.
  • Assessed the impact of THZ1 on transcriptional machinery in drug-tolerant cells.

Main Results:

  • Drug-tolerant cancer cells demonstrated sensitivity to THZ1.
  • THZ1 impaired the transcriptional machinery, hindering cellular adaptation.
  • Inhibition of transcriptional rewiring prevented therapeutic resistance.

Conclusions:

  • THZ1 represents a promising therapeutic agent against drug-tolerant cancer cells.
  • Targeting transcriptional regulation is a viable strategy to overcome cancer treatment resistance.

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