# Advanced Glycation End Products and Skin Autoimmune Disorders: Pathogenic Insights into Vitiligo, Bullous Pemphigoid, and Type 1 Diabetes Mellitus.
> 終末糖化産物と皮膚自己免疫疾患：白斑、水疱性類天疱瘡、1型糖尿病における病態機序の考察


## Abstract

Advanced glycation end products (AGEs) arise from non-enzymatic glycation of proteins, lipids, and nucleic acids, a process accelerated under hyperglycemic conditions characteristic of type 1 diabetes mellitus (T1DM). Binding of AGEs to their receptor RAGE initiates intracellular cascades that elevate reactive oxygen species (ROS) and activate inflammatory signaling. Structural modifications of self-proteins by AGEs generate neoantigens that become targets for autoreactive T cells and autoantibodies, implicating this pathway in vitiligo and bullous pemphigoid. Hypoxia further amplifies ROS generation through mitochondrial and other cellular mechanisms. This review evaluates strategies directed at AGE formation and oxidative stress, including AGE inhibitors such as aminoguanidine and pyridoxamine, and antioxidants including polyphenols, vitamins C and E, N-acetylcysteine, selenium, and hydrogen-rich water. Immune-modulating approaches such as regulatory T-cell strategies, cytokine inhibitors, anti-TNF-α agents, IL-6 inhibitors, and RAGE antagonists are also discussed as means to restore immune tolerance in T1DM-associated autoimmune skin conditions.

### Mechanism

AGE binding to RAGE elevates ROS and activates inflammatory pathways; structural modification of self-proteins creates neoantigens that trigger autoreactive immune responses. Hydrogen-rich water is proposed to neutralize ROS and restore oxidative balance, potentially limiting AGE-driven immune dysregulation.

## Bibliographic

- **Authors**: Bjørklund G, Gurgas L, Hangan T
- **Journal**: Curr Med Chem
- **Year**: 2025
- **PMID**: [40289982](https://pubmed.ncbi.nlm.nih.gov/40289982/)
- **DOI**: [10.2174/0109298673374335250410074811](https://doi.org/10.2174/0109298673374335250410074811)
- **Study type**: review
- **Delivery route**: hydrogen-rich water
- **Effect reported**: not assessed

## 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 40289982. https://h2-papers.org/en/papers/40289982
> **Source**: PubMed PMID [40289982](https://pubmed.ncbi.nlm.nih.gov/40289982/)