Photosynthesis-inspired H<sub>2</sub> generation using a chlorophyll-loaded liposomal nanoplatform to detect and scavenge excess ROS.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31988280.
- Also identified by DOI 10.1038/s41467-020-14413-x and PMC identifier 6985250.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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 H<sub>2</sub>-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 H<sub>2</sub> 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.
Medical subject headings
- Chlorophyll
- Hydrogen
- Liposomes
- Metal Nanoparticles
- Photosynthesis
- Reactive Oxygen Species