Related Experiment Video

Updated: Jul 6, 2026

Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
11:32

Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter

Published on: March 27, 2020

Modulation of drug resistance by artificial transcription factors

Pilar Blancafort1, Mario P Tschan, Sharon Bergquist

  • 1Department of Molecular Biology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Molecular Cancer Therapeutics
|March 6, 2008
PubMed

Insights

Researchers developed artificial transcription factors (ATFs) to combat cancer drug resistance. One ATF, 3ZF-1-VP, effectively induced resistance to multiple chemotherapy drugs, offering new therapeutic potential.

Area of Science:

  • Cancer Biology
  • Molecular Oncology
  • Drug Discovery

Background:

  • Chemotherapy resistance significantly limits cancer treatment efficacy.
  • Drug resistance arises from genetic and pathway dysregulation in cancer cells.

Purpose of the Study:

  • To identify novel regulators of drug resistance using a genome-wide screening approach.
  • To explore the therapeutic potential of artificial transcription factors (ATFs) in overcoming chemotherapy resistance.

Main Methods:

  • Screening of large libraries of artificial transcription factors (ATFs) composed of zinc finger domains linked to activation domains.
  • Delivery of ATFs into paclitaxel-sensitive tumor cell lines followed by drug treatment.
  • Analysis of ATF-mediated drug resistance, including p53 dependency, gene expression profiling, and drug sensitivity assays.

Main Results:

  • Several ATFs were identified that confer resistance to chemotherapy drugs.
  • A specific ATF, 3ZF-1-VP, induced resistance to paclitaxel, etoposide, vincristine, and cisplatinum, even in p53-mutated cell lines.
  • ATFs modulated p53-dependent and p53-independent survival pathways, upregulating targets like p21(WAF1/CIP1) and hDMP1.

Conclusions:

  • Artificial transcription factors can effectively map genes and pathways involved in cancer drug resistance.
  • ATFs demonstrate potential as novel therapeutic agents to overcome or modulate drug resistance in cancer treatment.

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