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

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.