Hydrogen as a Potential Modulator: Implications for Mast Cell-Sleep-Wake Rhythm-Melatonin Interactions in Sleep...

Area of Science:

• Sleep Science
• Immunology
• Chronobiology

Background:

• Sleep disorders like insomnia and obstructive sleep apnea (OSA) involve immune-inflammatory pathways, circadian timing, and melatonin systems.
• Mast cells are key immune cells implicated in the pathogenesis of these sleep disturbances.
• Current understanding of sleep-wake rhythm regulation and its link to mast cell activation is evolving.

Purpose of the Study:

• To review the interactions between immune-inflammatory pathways, circadian timing, and melatonin systems in sleep disorders.
• To explore the potential indirect mechanisms of hydrogen in improving sleep, focusing on its antioxidant and anti-inflammatory properties.
• To evaluate the existing evidence and theoretical framework for hydrogen's role in the mast cell-sleep-wake rhythm-melatonin axis.

Main Methods:

• Narrative review of literature from PubMed and CNKI (past decade).
• Integration of studies on inflammatory mediators, iron metabolism, and mitochondrial dysfunction in sleep disorders.
• Analysis of theoretical associations between hydrogen's properties and sleep regulation pathways.

Main Results:

• Direct evidence for hydrogen targeting the mast cell-sleep-wake rhythm-melatonin triad is critically lacking.
• Hydrogen's sleep-improving effects are hypothesized to be indirect, via antioxidant, anti-inflammatory, and mitochondrial protective actions.
• Existing evidence is inconsistent, context-dependent, and limited by methodological shortcomings.

Conclusions:

• Hydrogen may offer indirect chronobiotic effects by optimizing redox balance and reducing oxidative stress, supporting circadian function.
• Hydrogen is unlikely to directly target the core circadian clock machinery or specific pathophysiological drivers of all sleep disorders.
• Novel theoretical frameworks integrating hydrogen with the mast cell-sleep-wake rhythm-melatonin axis highlight research directions, but clinical efficacy remains unproven and requires further investigation.