Methylene Blue: Scientific Profile
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Methylene Blue is a phenothiazine with activity as a mitochondrial redox cofactor. It acts as an electron acceptor/donor in the electron transport chain for the research of cellular metabolic function.
In the field of biochemical research, Methylene Blue (Methylthioninium Chloride) is characterized by its unique ability to act as a cyclic redox mediator. Unlike other agents, this compound can bypass complexes of the electron transport chain (specifically complexes I-III), facilitating direct flow toward cytochrome c. This mechanism has generated academic interest in models of mitochondrial dysfunction and chronic oxidative stress.
Preclinical studies suggest that this compound possesses neuroprotective properties in contexts of ischemia and experimental neurodegeneration, derived from its ability to optimize oxygen consumption and reduce the production of reactive oxygen species (ROS). Likewise, its interaction with the enzyme soluble guanylate cyclase and its function as an inhibitor of monoamine oxidase type A (MAO-A) have been documented in laboratory settings.
The versatility of this agent allows its application across diverse research disciplines, from microbiology to experimental cognitive neuroscience. By increasing the mitochondrial membrane potential, Methylene Blue serves as a valuable tool for exploring the enhancement of cellular energy efficiency and resilience against induced metabolic insults.
Mechanism of action
It acts primarily as an artificial electron carrier in the mitochondria, accepting electrons from NADH dehydrogenase and transferring them to cytochrome c, optimizing the respiratory chain. Additionally, it inhibits nitric oxide synthase (NOS) and guanylate cyclase, modulating nitric oxide signaling pathways, and competitively inhibits the enzyme MAO-A.
Mechanism summary
It functions as a mitochondrial redox bridge and an inhibitor of the MAO-A enzyme, optimizing cellular respiration and modulating nitric oxide signaling.
Estudios Clínicos (10)
- [Methylene blue] (Kiyota K · Chudoku kenkyu: Chudoku Kenkyukai jun kikanshi = The Japanese journal of toxicology · 2008) PMID 19069129.
- Methylene-blue-associated encephalopathy (Sweet G et al. · Journal of the American College of Surgeons · 2007) PMID 17324781.
- Methylene blue (Clifton J 2nd et al. · American journal of therapeutics · 2003) PMID 12845393.
- Early adjunctive methylene blue in patients with septic shock: a randomized controlled trial. (Ibarra-Estrada M, et al. · Crit Care · 2023) PMID 36915146.
- Methylene Blue Reduces Mortality in Critically Ill and Perioperative Patients: A Meta-Analysis of Randomized Trials. (Pruna A, et al. · J Cardiothorac Vasc Anesth · 2024) PMID 37880041.
- Methylene blue modulates functional connectivity in the human brain. (Rodriguez P, et al. · Brain Imaging Behav · 2017) PMID 26961091.
- The effects of acute Methylene Blue administration on cerebral blood flow and metabolism in humans and rats. (Singh N, et al. · J Cereb Blood Flow Metab · 2023) PMID 36803299.
- Methylene blue delays cellular senescence and enhances key mitochondrial biochemical pathways. (Atamna H, et al. · FASEB J · 2008) PMID 17928358.
- Alternative mitochondrial electron transfer as a novel strategy for neuroprotection. (Wen Y, et al. · J Biol Chem · 2011) PMID 21454572.
- Molecular Mechanisms of the Neuroprotective Effect of Methylene Blue (Gureev, et al. · Biochemistry (Moscow) · 2022) PMID 36180986.
Warnings
Methylene Blue is a research-use-only (RUO) compound; the following warnings and handling considerations apply to its laboratory use:
- Product for research use only
- Do not use in test subjects with glucose-6-phosphate dehydrogenase deficiency
- Avoid combination with serotonergic agents
- Use personal protective equipment to avoid persistent staining
- Documented G6PD deficiency
- Presence of selective serotonin reuptake inhibitors (SSRIs)
- Severe renal dysfunction in study specimens
- Known hypersensitivity to phenothiazines
Technical data
- CAS
- 61-73-4
- Molecular formula
- C16H18ClN3S
- Molecular weight
- 319.85 Da
- Compound type
- nootropic
- Storage
- 15-25°C, protected from direct light
- Shelf life (lyophilized)
- 36 months
- Shelf life (reconstituted)
- Not applicable (Stable presentation in solution/solid)
- Light-sensitive
- Sí
Available for research
Methylene Blue is available as a research reagent (RUO):
Frequently asked questions about Methylene Blue
What is Methylene Blue?
Methylene Blue is a phenothiazine with activity as a mitochondrial redox cofactor. It acts as an electron acceptor/donor in the electron transport chain for the research of cellular metabolic function.
What is the mechanism of action of Methylene Blue?
It functions as a mitochondrial redox bridge and an inhibitor of the MAO-A enzyme, optimizing cellular respiration and modulating nitric oxide signaling.
What is Methylene Blue researched for?
In preclinical research, Methylene Blue is studied mainly in: Research on the optimization of mitochondrial energy metabolism; Study of neuroprotective effects in models of neurodegeneration; Modulation of the nitric oxide pathway in biological systems. Material exclusively for scientific research.
What are the chemical properties of Methylene Blue?
Molecular formula C16H18ClN3S; molecular weight 319.85 Da; CAS number 61-73-4.
How is Methylene Blue stored?
Storage conditions: 15-25°C, protected from direct light; lyophilized stability: 36 months; once reconstituted: Not applicable (Stable presentation in solution/solid); protect from light.
What routes of administration are studied for Methylene Blue?
The following are described in research models: Oral (Research), Intravenous (Research). Use is exclusively for scientific research.