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Salinomycin-Loaded Gold Nanoparticles for Treating Cancer Stem Cells by Ferroptosis-Induced Cell Death

Yongmei Zhao1, Wei Zhao2, Yi Chieh Lim3

  • 1School of Pharmacy , Nantong University , Nantong 226019 , China.

Molecular Pharmaceutics
|April 23, 2019
PubMed

Insights

Salinomycin-conjugated gold nanoparticles effectively target and eliminate cancer stem cells (CSCs). This novel Sal-AuNP treatment induces ferroptosis, offering a promising therapeutic strategy against metastasis and treatment resistance.

Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cancer Research

Background:

  • Cancer stem cells (CSCs) drive tumor growth, metastasis, and treatment resistance.
  • Salinomycin (Sal) shows potential in targeting CSCs, but its delivery needs enhancement.
  • Targeting specific CSC subpopulations like CD24low/CD44high is crucial for effective cancer therapy.

Purpose of the Study:

  • To develop and evaluate salinomycin-conjugated gold nanoparticles (Sal-AuNPs) for targeting breast cancer stem cells (BCSCs).
  • To investigate the mechanism of action of Sal-AuNPs in eliminating BCSCs.
  • To assess the therapeutic potential of Sal-AuNPs against CSCs.

Main Methods:

  • Conjugation of salinomycin with poly(ethylene glycol)-coated gold nanoparticles (AuNPs).
  • Treatment of CD24low/CD44high BCSCs with Sal-AuNPs.
  • Analysis of cell death mechanisms, including ferroptosis, oxidative stress, and mitochondrial function.

Main Results:

  • Sal-AuNPs demonstrated enhanced specificity and efficacy in targeting BCSCs.
  • BCSCs exhibited high sensitivity to Sal-AuNP treatment.
  • Sal-AuNPs induced ferroptosis via iron accumulation and inhibition of antioxidant pathways, leading to oxidative stress and mitochondrial dysfunction.

Conclusions:

  • Sal-AuNP formulation is an effective strategy for targeting and eliminating cancer stem cells.
  • The mechanism involves inducing ferroptosis, oxidative stress, and mitochondrial dysfunction in BCSCs.
  • Sal-AuNPs represent a promising therapeutic approach for overcoming CSC-mediated treatment resistance and metastasis.
Keywords:
ROScancer stem cellsferroptosisgold nanoparticlessalinomycin

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