Ajmaline

Ajmaline
Product Name Ajmaline
CAS No.: 4360-12-7
Catalog No.: CFN93513
Molecular Formula: C20H26N2O2
Molecular Weight: 326.4 g/mol
Purity: >=98%
Type of Compound: Alkaloids
Physical Desc.: Powder
Targets: Potassium Channel
Source: The roots of Rauvolfia verticillata
Solvent: Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
Price:
Ajmaline is a class Ia anti-arrhythmic compound that is widely used for the diagnosis of Brugada syndrome and the acute treatment of atrial or ventricular tachycardia. Ajmaline inhibits cardiac Kv1.5 and Kv4.3 channels at therapeutic concentrations.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months(2-8C).

Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.

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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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    Naunyn Schmiedebergs Arch Pharmacol. 2013 Nov;386(11):991-9.
    Inhibition of cardiac Kv1.5 and Kv4.3 potassium channels by the class Ia anti-arrhythmic ajmaline: mode of action.[Pubmed: 23832378]
    Ajmaline is a class Ia anti-arrhythmic compound that is widely used for the diagnosis of Brugada syndrome and the acute treatment of atrial or ventricular tachycardia. For Ajmaline, inhibitory effects on a variety of cardiac K(+) channels have been observed, including cardiac Kv1 and Kv4 channels. However, the exact pharmacological properties of channel blockade have not yet been addressed adequately.
    METHODS AND RESULTS:
    Using two different expression systems, we analysed pharmacological effects of Ajmaline on the potassium channels Kv1.5 and Kv4.3 underlying cardiac I Kur and I to current, respectively. When expressed in a mammalian cell line, we find that Ajmaline inhibits Kv1.5 and Kv4.3 with an IC50 of 1.70 and 2.66 μM, respectively. Pharmacological properties were further analysed using the Xenopus expression system. We find that Ajmaline is an open channel inhibitor of cardiac Kv1.5 and Kv4.3 channels. Whereas Ajmaline results in a mild leftward shift of Kv1.5 activation curve, no significant effect on Kv4.3 channel activation could be observed. Ajmaline did not significantly affect channel inactivation kinetics. Onset of block was fast. For Kv4.3 channels, no significant effect on recovery from inactivation or channel deactivation could be observed. Furthermore, there was no use-dependence of block.
    CONCLUSIONS:
    Taken together, we show that Ajmaline inhibits cardiac Kv1.5 and Kv4.3 channels at therapeutic concentrations. These data add to the current understanding of the electrophysiological basis of anti-arrhythmic action of Ajmaline.
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