Application

Fluorescent stain for heparin in mast cells

Biochem/physiol Actions

An alkaloid with weak antibiotic properties. Substrate for MDR efflux pumps. Antimicrobial activities of berberine is potentiated by the MDR inhibitor 5´-methoxyhydnocarpin (5´-MHC). Berberine upregulates the expression of Pgp in hepatoma cells. Treatment with berberine potentially results in the reduced accumulation of chemotherapeutic drugs.

General description

A highly potent and selective oxysterol EBI2 (GPR183) agonist (K_d) = 450 pM in a saturation binding assay, and EC₅₀ = 140 pM over EC₅₀ = 2.1 nM for its enantiomer, 7β,25-OHC, in a GTP-γS binding assay). Dose-dependently suppresses forskolin-induced cAMP accumulation in an EBI2-expressing SK-N-MC/CRE-β-galactosidase cell line (IC₅₀ = 2 nM), but not in control cells. Stimulates migration of LPS-activated spleen B-cells and anti-CD3/CD28-activated CD4⁺ T-cells in a dose-dependent manner. In addition, pharmacological inhibition of its biosynthesis in vivo by Clotrimazole, a CYP7B1inhibitor, promotes the migration of adoptively transferred pre-activated B cells to the T/B boundary, mimicking the phenotype of pre-activated B cells in EBI2-deficient mice.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Other Notes

Kinm. B., et al. 2011, Brit. Journ. Pharm.164, 106.Kong, W., et al. 2004, Nature Med.10, 1344.Dimlich, R. et al. 1980, Stain Technol.55, 217.

Packaging

25 mg in Glass bottle

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)