# Integrated Metabolomic and Transcriptomic Analyses to Understand the Effects of Hydrogen Water on the Roots of.
> 水素水処理がウジマオタオ根部に与える影響：メタボロミクスとトランスクリプトミクスの統合解析


## Abstract

This study examined how hydrogen-rich water (HRW) influences gene expression and metabolite profiles in the roots of Wuzhimaotao, a medicinal and edible plant used in Chinese herbal medicine. Transcriptomic analysis revealed 138 upregulated and 173 downregulated genes in HRW-treated roots compared with controls. LC-MS-based metabolomics identified 168 and 109 significantly altered metabolites in positive and negative ion modes, respectively. Among the upregulated metabolites were phenylpropanoid compounds including naringin, bergaptol, hesperidin, and benzofuran — key bioactive constituents of this plant. Integrated analysis indicated that phenylpropanoid biosynthesis and metabolism represent the primary pathways modulated by HRW. Most differentially expressed genes with |log2FC| ≥ 1 were transcription factor genes associated with plant hormone signaling, stress responses, and secondary metabolite production. These findings offer mechanistic insight into how molecular hydrogen influences plant biochemistry and provide a scientific basis for applying hydrogen in the cultivation of medicinal herbs.

### Mechanism

Hydrogen-rich water activates phenylpropanoid biosynthesis and metabolism pathways by modulating transcription factor genes linked to plant hormone signaling and secondary metabolism, thereby promoting accumulation of bioactive coumarins and flavonoids in root tissue.

## Bibliographic

- **Authors**: Zeng J, Yu HS
- **Journal**: Plants (Basel)
- **Year**: 2022 (2022-02-24)
- **PMID**: [35270073](https://pubmed.ncbi.nlm.nih.gov/35270073/)
- **DOI**: [10.3390/plants11050602](https://doi.org/10.3390/plants11050602)
- **PMC**: [PMC8912395](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912395/)
- **Study type**: in vitro 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)

---

> **Cite as**: H2 Papers — PMID 35270073. https://h2-papers.org/en/papers/35270073
> **Source**: PubMed PMID [35270073](https://pubmed.ncbi.nlm.nih.gov/35270073/)