New Hydrogen Nanoparticle Therapy Kills Melanoma Cancer Cells
- Authors
- Zahra Ahmadi, Sepideh Khoee, Samideh Khoei
- Journal
- International Journal of Biological Macromolecules
- Year
- 2026
- DOI
- 10.1016/j.ijbiomac.2026.150278
- Study Type
- Cell Culture
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- Iran
- Health Condition
- Melanoma
- Body System
- Integumentary
TL;DR
A light-activated nanomaterial that generates hydrogen and reactive oxygen species enhanced cancer cell killing and improved anticancer therapy effectiveness.
Key Finding
An engineered nanoparticle combining platinum-decorated carbon nitride with iron and chitosan killed melanoma cells nearly 9 times more effectively under visible-light exposure (IC₅₀ of 33 μg/mL) compared to dark conditions (IC₅₀ of 290 μg/mL).
Summary
Researchers created a specially engineered nanoparticle (a tiny particle made from carbon, nitrogen, platinum, and iron) designed to kill cancer cells when exposed to visible light. The nanoparticle works through multiple mechanisms: it generates reactive oxygen species (unstable molecules that damage cells), depletes glutathione (a protective molecule cancer cells use to defend themselves), and produces hydrogen gas. In laboratory tests using melanoma cells, the nanoparticle was significantly more effective at killing cancer cells when exposed to light compared to darkness.
Practical Takeaway
This is early-stage laboratory research in cancer cells, not a study of hydrogen water as a supplement. The work explores how hydrogen gas produced by engineered nanoparticles might contribute to cancer cell death when combined with light exposure and other mechanisms. This is fundamentally different from drinking hydrogen-enriched water, and no conclusions about hydrogen water's health effects can be drawn from this study.
Abstract
Graphitic carbon nitride (g-C3N4) has attracted considerable attention as a multifunctional platform for cancer therapy, including photodynamic therapy (PDT) and hydrogen (H2)-based therapeutic strategies, owing to its intrinsic photocatalytic activity. Nevertheless, its clinical translation is hindered by rapid photogenerated electron-hole recombination and tumor-associated defense mechanisms, such as elevated glutathione (GSH) levels and hypoxic microenvironments. In this work, we report the development of chitosan-modified g-C₃N₄ nanosheets (OCN/Pt-CTS) as a synergistic anticancer nanoplatform. Surface functionalization with chitosan significantly enhances the biocompatibility, aqueous dispersibility, and structural stability of the nanosheets. The incorporation of platinum (Pt) nanoparticles with multiple oxidation states effectively improves charge separation, facilitates reactive oxygen species (ROS) generation, promotes H2 and O2 evolution, and induces intracellular GSH depletion. Furthermore, the coordination of Fe3+ ions activates a photo-Fenton reaction, thereby amplifying ROS production and enhancing cancer cell cytotoxicity. Comprehensive structural and functional characterizations, including FT-IR, 1H NMR, TGA, XPS, HRTEM, and electrochemical analyses, confirmed the successful construction of the nanocomposite and its superior charge-carrier dynamics. Under visible-light irradiation, OCN/Pt-CTS exhibited markedly enhanced cytotoxicity toward A375 melanoma cells, with an IC₅₀ value of 33 μg/mL, compared to a substantially higher IC₅₀ of 290 μg/mL under dark conditions.