Hydrogen Therapy Blocks Opioid-Induced Pain Hypersensitivity in Rats
Hydrogen-rich saline controls remifentanil-induced hypernociception and NMDA receptor NR1 subunit membrane trafficking through GSK-3β in the DRG in rats
Research hubs: Brain & Nervous System
This research was done in animals. Results in animals often don't carry over to people.
- Evidence type
- Animal study (rat)
- Authors
- Linlin Zhang, Ruichen Shu, Chunyan Wang, Haiyun Wang, Nan Li, Guo-Lin Wang
- Journal
- Brain Research Bulletin
- Year
- 2014
- PMID
- 24951883
- Study Type
- Rat
- Delivery
- Saline (Dissolved)
- Dose
- 2.5, 5 or 10 ml/kg hydrogen-rich saline administered intraperitoneally
- H₂ concentration
- 10 μmol/L
- Duration
- 2 days
- Outcome
- Positive
- Peer Reviewed
- Yes
- Cited by
- 29 (OpenAlex, as of November 2026)
- Country
- China
TL;DR
Hydrogen-rich saline can reduce pain sensitivity and inflammation in rats by interfering with a specific pain-related pathway in nerve cells.
Key Finding
Hydrogen-rich saline reduced opioid-induced pain hypersensitivity in rats by inhibiting a protein called GSK-3β and preventing NMDA receptor trafficking in nerve cells, with doses of 5 and 10 ml/kg showing dose-dependent effects.
Summary
This rat study investigated whether hydrogen-rich saline could reduce pain hypersensitivity caused by remifentanil, a strong opioid painkiller. Researchers found that when rats received hydrogen-rich saline after remifentanil infusion, it reduced pain sensitivity in a dose-dependent manner (higher doses worked better) by decreasing inflammation and blocking certain pain-signaling pathways in nerve tissue.
Practical Takeaway
This is early-stage animal research showing hydrogen-rich saline may help prevent pain hypersensitivity from opioid use through anti-inflammatory mechanisms. However, these findings are from rats only and have not been tested in humans, so it is too early to draw conclusions about potential benefits for people taking opioid medications.
Abstract (excerpt)
Background: Although NMDAR trafficking mediated by GSK-3β involvement in transmission of pronociceptive messages in the spinal cord has been confirmed by our previous studies, whether NMDAR trafficking is implicated in peripheral sensitization remains equivocal. It is demonstrated that inflammation…