ROS-scavenging hydrogen nanotherapy simultaneously targets inflammation and pain in rheumatoid arthritis

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Rheumatology

Background:

• Rheumatoid arthritis (RA) management requires simultaneous pain relief and disease modification.
• Current treatments often fail to address both pain and inflammation effectively.
• Reactive oxygen species (ROS) play a key role in RA pathogenesis and pain signaling.

Purpose of the Study:

• To develop a synergistic therapeutic strategy for RA combining analgesia and anti-RA progression.
• To investigate the efficacy of a hydrogen nanogenerator for ROS scavenging in RA.
• To evaluate the potential of this approach for managing nociplastic pain in RA.

Main Methods:

• Fabrication and characterization of a hydrogen nanogenerator.
• In vitro assessment of ROS scavenging and cytoprotective effects on C17.2 cells.
• Establishment of a Complete Freund's Adjuvant-induced RA mouse model.
• Evaluation of anti-inflammatory, anti-apoptotic, and chondroprotective effects in vivo.
• Analysis of downstream signaling pathways including NF-κB and mitochondrial function.

Main Results:

• The hydrogen nanogenerator demonstrated efficient ROS scavenging and reduced cell apoptosis.
• In the RA mouse model, controlled hydrogen release downregulated pro-inflammatory mediators.
• The therapy protected chondrocytes, prevented cartilage degradation, and alleviated mitochondrial dysfunction.
• Hydrogen treatment effectively inhibited central sensitization and the NF-κB pathway.

Conclusions:

• Hydrogen nanogenerator offers a dual therapeutic approach for RA, addressing both pain and disease progression.
• This ROS-targeting strategy shows superior efficacy for nociplastic pain compared to conventional analgesics.
• The findings present a novel treatment modality for synergistic anti-inflammatory therapy and pain management in RA.