2025 · Bjørklund — Advanced Glycation End Products and Skin Autoimmune Disorders: Pathogenic Insights into Vitiligo, Bullous Pemphigoid, and Type 1 Diabetes Mellitus
Super-Abstract
Advanced glycation end products (AGEs) — toxic compounds formed under high blood sugar — trigger oxidative stress and autoimmune responses that can cause skin diseases such as vitiligo and bullous pemphigoid in Type 1 Diabetes. This review evaluates therapeutic strategies targeting AGE formation and oxidative stress, including hydrogen-rich water as an antioxidant adjunct. (Current Medicinal Chemistry, 2025.)
Commentary
In Type 1 Diabetes, chronic hyperglycaemia drives the non-enzymatic glycation of proteins, lipids, and nucleic acids, producing AGEs that activate the receptor RAGE and trigger ROS generation and inflammatory cascades. This review presents a mechanistic analysis of how AGEs contribute specifically to autoimmune skin disorders — vitiligo (melanocyte destruction) and bullous pemphigoid (subepidermal blistering) — through neoantigen formation and immune dysregulation. Hydrogen-rich water is mentioned as one antioxidant among several therapeutic candidates (alongside polyphenols, vitamins C and E, N-acetylcysteine, selenium) that could neutralise ROS and restore oxidative balance. H₂ is not the focus of the paper; it appears as a component in a broader antioxidant therapeutic strategy. The mechanistic framework is primarily theoretical and preclinical; robust clinical evidence for any of the discussed interventions in these autoimmune skin diseases is limited.
Key quotes
- „Antioxidants, including polyphenols, vitamins C and E, N-acetylcysteine, selenium, and hydrogen-rich water, help neutralize Reactive Oxygen Species (ROS), restoring oxidative balance.“ — H₂ listed as one of several antioxidant strategies to counter AGE-induced oxidative stress
- „AGEs expose new epitopes or modify existing ones, making them targets for autoreactive T cells and autoantibodies.“ — how glycation-modified proteins trigger autoimmunity in skin disorders
- „Combining AGE inhibitors and antioxidants may provide synergistic benefits by reducing oxidative stress and protein immunogenicity.“ — rationale for combining multiple therapeutic approaches
Our assessment
This is a mechanistic review exploring the AGE-RAGE-autoimmunity axis in the context of Type 1 Diabetes-associated skin disorders. Hydrogen-rich water is mentioned briefly as one antioxidant option among several — this is not an H₂-focused paper, and there are no clinical trials of H₂ specifically in vitiligo or bullous pemphigoid cited. The mechanistic framework is plausible and well-cited, but clinical evidence for any of the proposed therapies in these specific conditions is sparse. Findings are not directly transferable to treatment recommendations.
Study design
- Type: mechanistic/narrative review · n: n/a (literature synthesis) · H₂ delivery: hydrogen-rich water (mentioned as one antioxidant among several; no dedicated H₂ trials in this context cited)
- Result: AGE-RAGE pathway described as driver of oxidative stress and autoimmunity in vitiligo, bullous pemphigoid, and Type 1 Diabetes; H₂ identified as one of multiple antioxidant strategies; theoretical framework — no new experimental data
Abstract
AGEs are molecules formed by nonenzymatic glycation of proteins, lipids, and nucleic acids, a process accelerated under hyperglycemic conditions such as DM1. These molecules interact with specific receptors, particularly the Receptor for AGEs (RAGE), triggering intracellular signaling cascades that promote oxidative stress through the generation of Reactive Oxygen Species (ROS) and activation of inflammatory pathways. A critical pathological mechanism involves the formation of neoantigens, modified self-proteins that elicit immune responses. Structural alterations caused by AGEs expose new epitopes or modify existing ones, making them targets for autoreactive T cells and autoantibodies. This mechanism is implicated in autoimmune skin diseases such as vitiligo and bullous pemphigoid. Oxidative stress plays a central role in these diseases, exacerbated by AGEs through the generation of ROS and depletion of antioxidants, leading to melanocyte destruction in vitiligo and tissue damage in bullous pemphigoid. In addition, hypoxia enhances ROS production, mitochondria, and other cellular systems contributing to oxidative stress. Emerging evidence suggests that hypoxia can be mitigated by oxygen nanobubbles. Targeting AGE formation and oxidative stress presents a promising approach for the management of autoimmune skin disorders in DM1. Therapeutic strategies targeting AGE formation, oxidative stress, and immune dysregulation show promise for managing autoimmune skin disorders in Type 1 Diabetes Mellitus (T1DM). AGE inhibitors, such as aminoguanidine and pyridoxamine, reduce non-enzymatic protein glycation, limiting AGE accumulation and inflammatory signaling. Antioxidants, including polyphenols, vitamins C and E, N-acetylcysteine, selenium, and hydrogen-rich water, help neutralize Reactive Oxygen Species (ROS), restoring oxidative balance. Combining AGE inhibitors and antioxidants may provide synergistic benefits by reducing oxidative stress and protein immunogenicity. Additionally, immune modulation therapies, such as Treg therapy and cytokine inhibitors, aim to restore immune tolerance and prevent autoimmune activation. Anti-TNF-α and IL-6 inhibitors offer targeted inflammation suppression, while RAGE antagonists mitigate AGE-induced immune dysregulation. This study aims to explore the role of Advanced Glycation End products (AGEs) in the pathogenesis of autoimmune skin disorders associated with type 1 Diabetes Mellitus (DM1) and to evaluate potential therapeutic strategies targeting AGE formation and oxidative stress.
Source & links
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