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High-throughput Identification of Synergistic Drug Combinations by the Overlap2 Method
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Detecting the Potential Pharmacological Synergy of Drug Combination by Viability Assays In Vitro

Benjamin K Gibbs1, Carole Sourbier2

  • 1Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA.

Methods in Molecular Biology (Clifton, N.J.)
|November 28, 2017
PubMed

Insights

Heat shock protein 90 (HSP90) is crucial for cancer cell survival. Combination therapies targeting HSP90 and oncogenic pathways show promise for cancer treatment by enhancing drug synergy.

Area of Science:

  • Molecular biology
  • Cancer biology
  • Pharmacology

Background:

  • Heat shock protein 90 (HSP90) is a molecular chaperone essential for protein folding and cellular proteostasis.
  • HSP90 is vital for cell survival under stress but is often co-opted in cancer to support oncogenic proteins.
  • Aberrant HSP90 activity in cancer drives tumor growth by stabilizing key oncogenic kinases and transcription factors.

Purpose of the Study:

  • To outline a protocol for evaluating the synergistic potential of combination therapies involving HSP90 inhibitors.
  • To provide methods for assessing in vitro drug synergy for cancer treatment strategies.
  • To explore the therapeutic implications of targeting HSP90 in conjunction with oncogene-directed therapies.

Main Methods:

  • Detailed methodology for in vitro viability assays.
  • Protocols for assessing drug synergy in cancer cell lines.
  • Experimental design for combination therapy studies.

Main Results:

  • The protocol enables the quantitative assessment of polytherapy efficacy.
  • Viability assays can determine synergistic, additive, or antagonistic drug interactions.
  • This approach facilitates the identification of optimal combination treatment regimens.

Conclusions:

  • Combination therapy incorporating HSP90 inhibitors offers a promising strategy for cancer treatment.
  • Assessing drug synergy through in vitro viability assays is critical for therapeutic development.
  • Targeting HSP90 alongside oncogenic pathways may overcome resistance and improve patient outcomes.
Keywords:
MethodsPolytherapySynergyViability assays

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