Tiny Hydrogen-Producing Robots Show Promise for Arthritis Treatment
- Authors
- Cong Xu, Shuanghu Wang, Hong Wang, Kun Liu, Shiyu Zhang, Bin Chen, Hao Liu, Fei Tong, Fei Peng, Yingfeng Tu, Yingjia Li
- Journal
- Nano Letters
- Year
- 2021
- DOI
- 10.1021/acs.nanolett.0c04438
- Study Type
- Cell Culture
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Rheumatoid Arthritis
- Body System
- Musculoskeletal
TL;DR
Scientists have created tiny, self-propelled particles that produce hydrogen to effectively reduce inflammation and treat rheumatoid arthritis in rats.
Key Finding
Magnesium micromotors injected directly into joints generated hydrogen locally and reduced inflammatory markers and joint damage in rat models of rheumatoid arthritis.
Summary
Researchers developed tiny magnesium-based particles coated with a natural substance called hyaluronic acid that can generate hydrogen gas when injected directly into joints. In rat models of rheumatoid arthritis, these micromotors reduced harmful molecules called reactive oxygen species and decreased inflammation markers, which helped reduce joint damage and arthritis severity. This approach aims to overcome the challenge that hydrogen gas doesn't dissolve well in the body under normal conditions.
Practical Takeaway
This is early-stage research conducted only in animal models, not humans, so it's far too soon to know if this approach would work in people with arthritis. The study suggests that targeted hydrogen delivery to joints may be more effective than systemic hydrogen therapy, but significant development and human testing would be needed before any clinical application.
Abstract
Hydrogen therapy is an emerging and highly promising strategy for the treatment of inflammation-related diseases. However, nonpolarity and low solubility of hydrogen under the physiological conditions results in a limited therapeutic effect. Herein, we develop a biocompatible magnesium micromotor coated with hyaluronic acid as a hydrogen generator for precise rheumatoid arthritis management. The hydrogen bubbles generated locally not only function as a propellant for the motion but also function as the active ingredient for reactive oxygen species (ROS) and inflammation scavenging. Under ultrasound guidance, the micromotors are injected intra-articularly, and the dynamics of the micromotors can be visualized. By scavenging ROS and inflammation via active hydrogen, the oxidative stress is relieved and the levels of inflammation cytokines are reduced by our micromotors, showing prominent therapeutic efficacy in ameliorating joint damage and suppressing the overall arthritis severity toward a collagen-induced arthritis rat model. Therefore, our micromotors show great potential for the therapy of rheumatoid arthritis and further clinical transformation.