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An immunogenic anti-cancer stem cell bi-nuclear copper(II)-flufenamic acid complex.

Yue Li1, Jiaxin Fang1, Kuldip Singh1

  • 1School of Chemistry, University of Leicester, Leicester, LE1 7RH, UK. k.suntharalingam@leicester.ac.uk.

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|March 19, 2024
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Summary
This summary is machine-generated.

A novel copper(II) complex shows potent activity against breast cancer stem cells (CSCs), inducing cell death and triggering immune cell engulfment. This discovery offers a new strategy for targeting aggressive breast cancers.

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Area of Science:

  • Inorganic Chemistry
  • Cancer Biology
  • Immunology

Background:

  • Breast cancer stem cells (CSCs) are crucial for tumor recurrence and metastasis.
  • Targeting CSCs is essential for effective breast cancer treatment.
  • Current therapies often lack specificity and efficacy against CSCs.

Purpose of the Study:

  • To synthesize and characterize a novel asymmetric bi-nuclear copper(II) complex.
  • To evaluate the cytotoxic and immunogenic activity of the complex against breast CSCs.
  • To elucidate the mechanism of action of the copper(II) complex in targeting breast CSCs.

Main Methods:

  • Synthesis and characterization of the bi-nuclear copper(II) complex.
  • In vitro evaluation of cytotoxicity against breast CSCs in monolayer and 3D cultures.
  • Assessment of immunogenic activity, including reactive oxygen species (ROS) generation, apoptosis induction, and damage-associated molecular pattern (DAMP) release.
  • Macrophage phagocytosis assays.

Main Results:

  • The bi-nuclear copper(II) complex demonstrated sub-micromolar potency against breast CSCs.
  • The complex was significantly more potent than established agents like salinomycin and cisplatin.
  • Mechanistic studies revealed ROS elevation, apoptosis induction, and DAMP release.
  • The complex induced phagocytosis of breast CSCs by macrophages.

Conclusions:

  • The reported bi-nuclear copper(II) complex possesses potent cytotoxic and immunogenic activities against breast CSCs.
  • This complex represents a promising new therapeutic agent for breast cancer, particularly for targeting CSC populations.
  • This is the first report of a bi-nuclear copper(II) complex inducing immune cell engulfment of breast CSCs, highlighting a novel immunogenic mechanism.