Methylene Blue

Catalog No.S4535 Batch:S453501

Print

Technical Data

Formula

C16H18ClN3S
Molecular Weight 319.85 CAS No. 61-73-4
Solubility (25°C)* In vitro DMSO 63 mg/mL (196.96 mM)
Water 63 mg/mL (196.96 mM)
Ethanol 10 mg/mL (31.26 mM)
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Methylene Blue (Basic Blue 9, Tetramethylthionine chloride, methylthioninium chloride, CI-52015) is used as a dye in chromoendoscopy. It Inhibits tau filament formation with IC50 of 1.9μM. Also it inhibits soluble guanylyl cyclase.
Targets
guanylate cyclase [3] Tau aggregation [2]
1.9 μM
In vitro MB may inhibit the action of nitric oxide synthase itself and could also inactivate nitric oxide directly, possibly through the generation of superoxide anions. In addition to interfering with the nitric oxide–cyclic guanosine monophosphate pathway, MB has also been shown to directly activate calcium-dependent potassium channels and to enhance release of noradrenaline from intracellular stores[1].
In vivo Methylene Blue acts by inhibiting guanylate cyclase, thus decreasing C-GMP and vascular smooth muscle relaxation. When injected intravenously, MB selectively accumulates in parathyroid glands, thereby facilitating the identification of these structures during surgery. Pharmacokinetic studies in rodents revealed that intravascular administration of MB leads to a rapid and extensive accumulation of this drug in the central nervous system (CNS)[1].

Protocol (from reference)

Cell Assay:

[1]
  • Cell lines

    Immature neuroblasts

  • Concentrations

    10 μM

  • Incubation Time

    2 h

  • Method

    single cell culture model where immature neuroblasts, isolated from the newborn rat subventricular zone, differentiate into γ-aminobutyric acid–mediated neurons are usd for investigations. Cultures are exposed at the sixth day in vitro to MB for 2 h and then we assess the survival and dendritic arbor architecture of these cells 48 h after this treatment paradigm.
Animal Study:

[1]
  • Animal Models

    Sprague- Dawley male rats

  • Dosages

    5 and 50 mg/kg

  • Administration

    intravascular injection

Selleck's Methylene Blue has been cited by 2 publications

Dissecting peri-implantation development using cultured human embryos and embryo-like assembloids [ Cell Res, 2023, 10.1038/s41422-023-00846-8] PubMed: 37460804
Reversal of Infected Host Gene Expression Identifies Repurposed Drug Candidates for COVID-19 [ bioRxiv, 2020, 2020/9/20.4.7.30734] PubMed: 32511305

RETURN POLICY
Selleck Chemical’s Unconditional Return Policy ensures a smooth online shopping experience for our customers. If you are in any way unsatisfied with your purchase, you may return any item(s) within 7 days of receiving it. In the event of product quality issues, either protocol related or product related problems, you may return any item(s) within 365 days from the original purchase date. Please follow the instructions below when returning products.

SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.