Methylene Blue

Methylene Blue (Methylthioninium Chloride) is a synthetic phenothiazine dye with a molecular formula of C16H18ClN3S and molecular weight of 319.9 g/mol (CAS: 61-73-4). First synthesized in 1876, it has a long history in biological research as both a vital stain and a pharmacologically active compound with unique redox-cycling properties.

Research has characterized Methylene Blue as an alternative electron carrier in the mitochondrial electron transport chain. At low concentrations, it accepts electrons from NADH and transfers them directly to cytochrome c, effectively bypassing complex I and III where most mitochondrial ROS are generated. This mechanism reduces superoxide production while maintaining or enhancing ATP synthesis.

Preclinical neuroprotection research demonstrates Methylene Blue’s ability to improve mitochondrial function in neurodegeneration models, with studies showing reduced tau and amyloid-beta aggregation, enhanced autophagy, and improved cognitive function in Alzheimer’s disease models. Research in traumatic brain injury models shows preserved mitochondrial respiration and reduced lesion volume.

Additional research areas include Methylene Blue’s documented effects on memory consolidation through enhancement of cytochrome c oxidase activity in memory-associated brain regions, its antimicrobial properties through photodynamic mechanisms, and its role as a nitric oxide synthase inhibitor with implications for vasoplegic syndrome research.

Supplied at research-grade purity, verified by HPLC analysis.