# Effect of molecular hydrogen, a novelly-established antioxidant, on the retinal degeneration of hereditary retinitis pigmentosa: anstudy.
> 遺伝性網膜色素変性症モデルマウスにおける分子状水素の網膜変性への影響


## Abstract

This study examined whether molecular hydrogen (H2), recognized as a selective antioxidant, could influence retinal degeneration in a mouse model of hereditary retinitis pigmentosa (RP). Animals were randomly assigned to a control group or one of three H2 intervention groups—two utilizing hydrogen gas and one using hydrogen-rich saline. At postnatal days 14 and 21, electroretinogram amplitude, fundus photography, optical coherence tomography measurements of retinal layer thickness (including the outer nuclear layer), and Iba1-positive microglial cell counts were assessed. None of these parameters showed statistically significant differences between the control and H2-treated groups. The findings indicate that neither hydrogen gas nor hydrogen-rich saline administration produced measurable effects on the progression of retinal degeneration in this hereditary RP model, suggesting that the underlying photoreceptor degeneration mechanism in this model may require distinct interventional approaches.

### Mechanism

H2 is proposed to act as a selective antioxidant; however, the photoreceptor degeneration pathway in this hereditary RP mouse model may not be primarily driven by oxidative stress mechanisms amenable to H2 intervention, potentially explaining the absence of observed effects.

## Bibliographic

- **Authors**: Yan W, He Q, Long P, Chen TX, Zhang LL, Wang H
- **Journal**: Front Pharmacol
- **Year**: 2023
- **PMID**: [38638334](https://pubmed.ncbi.nlm.nih.gov/38638334/)
- **DOI**: [10.3389/fphar.2023.1294315](https://doi.org/10.3389/fphar.2023.1294315)
- **PMC**: [PMC11025393](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11025393/)
- **Study type**: animal study
- **Delivery route**: mixed routes
- **Effect reported**: null

## Delivery context

This study combines multiple delivery routes. As a general principle, the most efficient route for routine hydrogen intake is inhalation. Inhalation carries explosion risk (empirical LFL of 10%; high-concentration devices are documented in the Consumer Affairs Agency accident database and are not recommended).

## Safety notes

This study combines multiple delivery routes. As a general principle, the most efficient route for routine hydrogen intake is inhalation. Inhalation carries explosion risk (empirical LFL of 10%; 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 38638334. https://h2-papers.org/en/papers/38638334
> **Source**: PubMed PMID [38638334](https://pubmed.ncbi.nlm.nih.gov/38638334/)