How long does Blebbistatin take to work?
In the majority of the published studies, blebbistatin is applied at 50–100 μM concentrations, although at such concentrations blebbistatin precipitates and the effective concentration exponentially drops to the equilibrium saturation concentration (9 μM) in two hours.
What is the function of blebbistatin?
Blebbistatin is a myosin inhibitor mostly specific for myosin II. It is widely used in research to inhibit heart muscle myosin, non-muscle myosin II, and skeletal muscle myosin.
How long does Blebbistatin last?
This assay lasts about 10 hours.
Is Blebbistatin reversible?
Blebbistatin-induced changes in cell shape, actin cytoskeletal organization, and focal adhesions were found to be reversible on washout of drug from the cell culture medium.
How does Blebbistatin inhibit myosin?
Blebbistatin is a recently discovered small molecule inhibitor showing high affinity and selectivity toward myosin II. Blebbistatin interferes neither with binding of myosin to actin nor with ATP-induced actomyosin dissociation. Instead, it blocks the myosin heads in a products complex with low actin affinity.
Is Blebbistatin light sensitive?
Despite its popularity, the use of blebbistatin is hindered by its poor water-solubility (below 10 micromolar in aqueous buffer) and blue-light sensitivity, resulting in the photoconversion of the molecule, causing severe cellular phototoxicity in addition to its cytotoxicity.
What is blebbistatin used to treat?
Blebbistatin is a myosin inhibitor mostly specific for myosin II. It is widely used in research to inhibit heart muscle myosin, non-muscle myosin II, and skeletal muscle myosin.
Does blebbistatin inhibit myosin II activity?
Blebbistatin inhibits the ATPase activity and in vitro motility of vertebrate nonmuscle myosin IIA and IIB, porcine/rabbit/scallop striated muscle myosin II proteins, and Dictyostelium myosin II, with half-maximal IC 50 values between 0.5 and 5 μM [ 26, 31 ].
Why can’t blebbistatin be used for in-vivo imaging?
Long-term incubation with blebbistatin results in cell damage and cytotoxicity, which are independent of the myosin inhibitory effect. This photo-instability, phototoxicity and fluorescence makes in-vivo imaging of blebbistatin-treated samples impossible.
What is the difference between blebbistatin and para-aminoblebbistatins?
Para-aminoblebbistatin is a slightly weaker myosin inhibitor than blebbistatin (for rabbit skeletal muscle myosin S1 IC50=1.3 μM, for Dictyostelium discoideum myosin II motor domain IC50=6.6 μM with only 90% maximal inhibition), it is non-fluorescent, photostable, neither cytotoxic nor phototoxic.