# The potential cardioprotective effects of hydrogen in irradiated mice.
> 水素富化水による放射線照射マウスの心臓保護効果の検討


## Abstract

Ionizing radiation causes tissue damage primarily through hydroxyl radical generation. This murine study investigated whether hydrogen-rich water (pure water saturated with molecular hydrogen) could protect cardiac tissue from radiation-induced injury. Mice receiving hydrogen-rich water showed suppression of myocardial degeneration following irradiation. Cardiac levels of malondialdehyde (MDA) and 8-hydroxydeoxyguanosine (8-OHdG), both markers of oxidative damage, were reduced, while endogenous antioxidant activity in myocardial tissue was elevated. These findings indicate that molecular hydrogen exerts a cardioprotective effect against radiation-induced oxidative injury in vivo, likely through selective scavenging of hydroxyl radicals.

### Mechanism

Molecular hydrogen selectively scavenges hydroxyl radicals, reducing myocardial MDA and 8-OHdG accumulation while enhancing endogenous antioxidant defenses, thereby mitigating radiation-induced oxidative damage to cardiac tissue.

## Bibliographic

- **Authors**: Qian L, Cao F, Cui J, Wang Y, Huang Y, Chuai Y, et al.
- **Journal**: J Radiat Res
- **Year**: 2010
- **PMID**: [21116102](https://pubmed.ncbi.nlm.nih.gov/21116102/)
- **DOI**: [10.1269/jrr.10093](https://doi.org/10.1269/jrr.10093)
- **Study type**: animal study
- **Delivery route**: hydrogen-rich water
- **Effect reported**: positive

## Delivery context

Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).

## Safety notes

Hydrogen-rich water is a low-risk delivery route, but the achievable systemic hydrogen dose is bounded. For clinical applications, inhalation is the most efficient route; inhalation, however, carries explosion risk, and concentration matters (empirical LFL of 10% applies to inhalation environments; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).

See also:
- [Inhalation concentration and LFL / UFL](https://h2-papers.org/en/safety-notes/inhalation-concentration)
- [Consumer Affairs Agency accident cases](https://h2-papers.org/en/safety-notes/accident-cases)
- [Inhalation safety threshold lineage](https://h2-papers.org/en/safety-notes/lineage)

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> **Cite as**: H2 Papers — PMID 21116102. https://h2-papers.org/en/papers/21116102
> **Source**: PubMed PMID [21116102](https://pubmed.ncbi.nlm.nih.gov/21116102/)