New Nano-Device Creates Hydrogen Gas to Fight Cell Damage
- Authors
- Wei-Lin Wan, Bo Tian, Yu-Jung Lin, Chiranjeevi Korupalli, Ming-Yen Lu, Qinghua Cui, Dehui Wan, Yen Chang, Hsing-Wen Sung
- Journal
- Nature Communications
- Year
- 2020
- DOI
- 10.1038/s41467-020-14413-x
- Study Type
- Cell Culture
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Oxidative Stress
- Body System
- Cellular
TL;DR
Scientists have created a tiny, light-powered nanodevice that can both image and treat diseased tissues by regulating harmful oxygen molecules and producing hydrogen gas.
Key Finding
A light-activated nanoparticle system containing chlorophyll can generate hydrogen gas to neutralize excess reactive oxygen species in cells while simultaneously detecting ROS levels.
Summary
Researchers created a tiny nanoparticle system inspired by how plants use sunlight to make energy. The system contains chlorophyll (the green pigment in plants) and can generate hydrogen gas when exposed to light. The hydrogen gas is designed to neutralize excess reactive oxygen species (ROS)—unstable molecules that can damage cells and contribute to disease. This was tested in cell cultures, not in living organisms.
Practical Takeaway
This is very early-stage research conducted only in cell cultures, not in animals or humans. While the concept of using hydrogen gas to manage oxidative stress is intriguing, this particular technology would need substantial additional testing before any health applications could be considered. The study demonstrates a proof-of-concept rather than evidence of effectiveness in living systems.
Abstract
A disturbance of reactive oxygen species (ROS) homeostasis may cause the pathogenesis of many diseases. Inspired by natural photosynthesis, this work proposes a photo-driven H2-evolving liposomal nanoplatform (Lip NP) that comprises an upconversion nanoparticle (UCNP) that is conjugated with gold nanoparticles (AuNPs) via a ROS-responsive linker, which is encapsulated inside the liposomal system in which the lipid bilayer embeds chlorophyll a (Chla). The UCNP functions as a transducer, converting NIR light into upconversion luminescence for simultaneous imaging and therapy in situ. Functioning as light-harvesting antennas, AuNPs are used to detect the local concentration of ROS for FRET biosensing, while the Chla activates the photosynthesis of H2 gas to scavenge local excess ROS. The results thus obtained indicate the potential of using the Lip NPs in the analysis of biological tissues, restoring their ROS homeostasis, possibly preventing the initiation and progression of diseases.