Breathing Hydrogen Gas May Protect Brain Function After Sepsis in Mice
High-concentration hydrogen mitigates cognitive impairment in a murine model of Sepsis-associated encephalopathy by enhancing oligodendrocyte maturation and myelination in the mPFC
Research hubs: Brain & Nervous System · Immune System
This research was done in animals. Results in animals often don't carry over to people.
- Evidence type
- Animal study (mouse)
- Authors
- Jiafeng Yu, Wenjie Qi, Feixiang Li, Beichuan Chang, Zengkun Wang, Yufei Kan, Yonghao Yu, Yang Yu
- Journal
- Progress om Neuropsychopharmacology and Biological Psychiatry
- Year
- 2026
- PMID
- 42600835
- Study Type
- Mouse
- Delivery
- Gas
- Dose
- Hydrogen inhalation at 1 and 4 h postoperatively plus daily 2-h sustained inhalation
- H₂ concentration
- 67%
- Outcome
- Positive
- Peer Reviewed
- Yes
- Cited by
- 0 (OpenAlex, as of November 2026)
- Country
- China
TL;DR
High-concentration hydrogen inhalation improved cognition and myelin integrity after sepsis-associated encephalopathy in mice, apparently by suppressing excessive mTOR activity and promoting oligodendrocyte maturation.
Key Finding
Inhaling 67% hydrogen gas reduced cognitive impairment in septic mice by suppressing an overactive mTOR signaling pathway, which allowed protective myelin-forming cells in the brain to mature and rebuild damaged nerve insulation.
Summary
This mouse study looked at whether breathing high-concentration hydrogen gas (67%) could protect the brain during sepsis-associated encephalopathy (SAE) — a condition where serious infection leads to brain dysfunction and lasting memory problems. Researchers found that in mice with SAE, a cellular pathway called mTOR became overactive, which blocked the normal development of oligodendrocytes (cells that form the protective myelin sheath around nerve fibers) and damaged brain wiring in the prefrontal cortex. Mice that inhaled 67% hydrogen gas showed better cognitive performance, healthier myelin structure, and improved brain adaptability compared to untreated SAE mice.
Practical Takeaway
This is an animal study using very high-concentration hydrogen gas (67%), so results cannot be directly applied to humans or to lower-concentration hydrogen water products. Early evidence suggests hydrogen may support brain health during severe illness through a specific cellular mechanism, but clinical trials in humans would be needed before drawing any conclusions about real-world benefit.
Abstract (excerpt)
Sepsis-associated encephalopathy (SAE) commonly elicits long-lasting cognitive deterioration. Although hydrogen inhalation exerts protective effects in sepsis, its underlying mechanisms remain unclear. Dysregulated oligodendrocyte maturation and myelin architectural defects are pivotal pathological…