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Tris-Functionalized Polyoxotungstovanadate-Mediated Antitumor Efficacy Involves Multiple Cell Death Pathways.

Lihong Chen1, Zijia Zhao2, Rominah Onintsoa Diarimalala2

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Chemistry & Biodiversity
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Polyoxometalates (POMs) show promise as low-cost cancer chemotherapy agents. A specific {V4W2} POM demonstrated significant antitumor activity by inducing multiple cell death pathways, indicating broad-spectrum potential.

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Polyoxometalatesantitumor activitycell death pathwaymigrationproliferationtherapeutic index

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Cancer Research

Background:

  • Polyoxometalates (POMs) are cost-effective inorganic compounds with potential in cancer chemotherapy.
  • Lindqvist-type POMs with mixed-addenda atoms offer tunable properties for therapeutic applications.

Purpose of the Study:

  • To synthesize and evaluate the antitumor activity of novel Lindqvist-type POMs.
  • To compare the efficacy of POMs against established chemotherapy drugs like 5-fluorouracil (5-FU) and Gemcitabine.
  • To investigate the mechanisms of POM-induced cell death in various cancer cell lines.

Main Methods:

  • Synthesis of four Lindqvist-type POMs with mixed-addenda atoms.
  • MTT/CCK-8, colony formation, and wound healing assays to assess cytotoxicity and anti-proliferative/migratory effects.
  • Flow cytometry, qRT-PCR, and Western blotting to analyze cell death pathways (apoptosis, autophagy, necroptosis, pyroptosis).

Main Results:

  • The {V4W2} POMs exhibited acceptable cytotoxicity in normal cells and significant inhibition of proliferation and migration in A549, HeLa, and MCF-7 cancer cell lines.
  • The {V4W2} POM with R= -CH2OH showed the most favorable therapeutic index.
  • POM treatment induced apoptosis and activated multiple cell death pathways, including autophagy, necroptosis, and pyroptosis.

Conclusions:

  • The synthesized polyoxotungstovanadate POMs possess significant antitumor potential.
  • The {V4W2} POM with R= -CH2OH is a promising candidate for broad-spectrum anticancer drug development.
  • POMs activate diverse cell death mechanisms, offering a multi-pronged approach to cancer chemotherapy.