# Proteomic analysis provides insights into the molecular bases of hydrogen gas-induced cadmium resistance in Medicago sativa.
> アルファルファにおける水素ガス誘導カドミウム耐性の分子基盤：プロテオミクス解析による知見


## Abstract

Using iTRAQ-based quantitative proteomics, this study examined the molecular basis by which hydrogen-rich water (HRW) enhances cadmium (Cd) tolerance in Medicago sativa seedlings. A total of 2,377 proteins were identified at less than 1% false discovery rate, with 1,254 showing quantifiable abundance changes. Among these, 248 proteins exhibited significant differential expression under Cd and/or HRW conditions, and 92 were subjected to detailed bioinformatics analysis. Seven functional categories emerged: stress defense, sulfur compound metabolism, amino acid and protein metabolism, carbohydrate and energy metabolism, secondary metabolism, oxidation-reduction processes, and metal ion homeostasis. Consistent with these proteomic profiles, HRW-treated seedlings displayed reduced lipid peroxidation, elevated non-protein thiol levels, and maintained iron and zinc homeostasis. Collectively, the data indicate that HRW mitigates Cd-induced damage primarily through suppression of oxidative injury, upregulation of sulfur metabolic pathways, and preservation of nutrient element balance in plant tissues.

### Mechanism

HRW reduces cadmium toxicity in alfalfa by suppressing oxidative damage, enhancing sulfur compound metabolic pathways, and maintaining iron and zinc nutrient homeostasis, as revealed by differential protein expression across seven functional categories.

## Bibliographic

- **Authors**: Dai C, Cui W, Pan J, Xie Y, Wang J, Shen W
- **Journal**: J Proteomics
- **Year**: 2017 (2017-01-30)
- **PMID**: [27989938](https://pubmed.ncbi.nlm.nih.gov/27989938/)
- **DOI**: [10.1016/j.jprot.2016.10.013](https://doi.org/10.1016/j.jprot.2016.10.013)
- **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)

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> **Cite as**: H2 Papers — PMID 27989938. https://h2-papers.org/en/papers/27989938
> **Source**: PubMed PMID [27989938](https://pubmed.ncbi.nlm.nih.gov/27989938/)