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Orthotopic Transplantation of Breast Tumors as Preclinical Models for Breast Cancer
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Preclinical study of a Kv11.1 potassium channel activator as antineoplastic approach for breast cancer

Daniela F Fukushiro-Lopes1, Alexandra D Hegel1, Vidhya Rao1,2

  • 1Department of Molecular Pharmacology and Therapeutics, Loyola University Chicago, Stritch School of Medicine, Maywood, IL, USA.

Oncotarget
|February 10, 2018
PubMed

Insights

Targeting potassium channels with NS1643 halts breast tumor growth. This approach induces DNA damage and senescence in cancer cells without causing cardiac side effects, offering a potential new therapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Potassium ion (K+) channels are increasingly recognized for their role in cancer biology.
  • Pharmacological targeting of ion channels is a promising therapeutic strategy, but K+ channel roles in cancer remain underexplored.

Purpose of the Study:

  • To investigate the effects of targeting Kv11.1 potassium channels in an in vivo breast cancer model.
  • To evaluate the efficacy and safety of the Kv11.1 activator NS1643 in inhibiting tumor growth.

Main Methods:

  • Utilized an in vivo model of breast cancer treated with the Kv11.1 activator NS1643.
  • Assessed tumor growth, proliferation markers, senescence markers, reactive oxygen species (ROS) production, and DNA damage.
  • Monitored for cardiac dysfunction in treated mice.

Main Results:

  • NS1643 treatment significantly inhibited tumor growth in the breast cancer model.
  • NS1643-treated tumors showed reduced proliferation, increased senescence markers, elevated ROS, and DNA damage.
  • No significant cardiac dysfunction was observed in mice treated with NS1643.

Conclusions:

  • Pharmacological stimulation of Kv11.1 channels with NS1643 effectively arrested tumor growth in triple-negative breast cancer (TNBC) models.
  • The mechanism involves inducing DNA damage and senescence in cancer cells.
  • Kv11.1 channel activators represent a potential therapeutic strategy for breast tumors with minimal side effects.
Keywords:
DNA damageactivatorcancer therapyion channelssenescence

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