| Size | Price | Stock | Qty |
|---|---|---|---|
| 100mg |
|
||
| 250mg |
|
||
| 500mg |
|
||
| Other Sizes |
|
Purity: ≥98%
Mibefradil (formerly Ro-405967; Ro 40-5967; trade name: Posicor), an approved drug that can be used for the treatment of hypertension and chronic angina pectoris, is a calcium channel blocker/CCB with moderate selectivity for T-type Ca2+ channels displaying IC50s of 2.7 μM and 18.6 μM for T-type and L-type currents, respectively. As a calcium channel blocker, the mechanism of action of mibefradil is characterized by the selective blockade of transient, low-voltage-activated (T-type) calcium channels over long-lasting, high-voltage-activated (L-type) calcium channels, which is probably responsible for many of its unique properties. It is nonselective. On June 8, 1998, Roche announced the voluntary withdrawal of the drug from the market, one year after approval by the FDA, due to the potential for drug interactions, some of them deadly, which may occur when it is taken together with some other medications.
| Targets |
|
|
|---|---|---|
| ln Vitro |
The T- and L-type currents are reversibly inhibited by mibefradil, with IC50 values of 2.7 and 18.6 μM, respectively. While the T-type current is not voltage-dependently inhibited, the L-type current is. At a concentration of 20 µM, Mibefradil decreases the amplitude of excitatory junction potentials by 37±10%, slows down the rate of repolarization by 44±16%, and significantly depolarizes the membrane potential (from −83±1 mV to −71±5 mV). Ro 40-5967 already blocks T-type current at a holding potential of -100 mV[1]. Repolarization is slowed down and there is notable membrane potential depolarization at a dose of 20 µM mibefradil. Mibefradil's activities align with the suppression of K+ channels, which has been demonstrated in human myoblasts and other cells[2].
|
|
| ln Vivo |
After four weeks of therapy, the 24-26-week-old C57BL/6J mice had different hearing thresholds. When compared to the saline-treated group, the hearing threshold at 24 kHz was considerably lower in the groups treated with benidipine and mibefradil (P<0.05)[3]. Rats given either Ethosuximide or Mibefradil in the spinal cord and DRG exhibit noticeably reduced CaV3.2 expression in comparison to the saline-treated group[4].
|
|
| References |
[1]. Mehrke G, et al. The Ca(++)-channel blocker Ro 40-5967 blocks differently T-type and L-type Ca++ channels. J Pharmacol Exp Ther. 1994 Dec;271(3):1483-8.
[2]. Brain KL, et al. The sources and sequestration of Ca(2+) contributing to neuroeffector Ca(2+) transients in the mouse vas deferens. J Physiol. 2003 Dec 1;553(Pt 2):627-35. [3]. Yu YF, et al. Protection of the cochlear hair cells in adult C57BL/6J mice by T-type calcium channel blockers. Exp Ther Med. 2016 Mar;11(3):1039-1044. [4]. Shiue SJ, et al. Chronic intrathecal infusion of T-type calcium channel blockers attenuates CaV3.2 upregulation in nerve-ligated rats. Acta Anaesthesiol Taiwan. 2016 Oct 17. pii: S1875-4597(16)30071-6 |
| Molecular Formula |
C29H38N3O3F
|
|---|---|
| Molecular Weight |
495.62872
|
| CAS # |
116644-53-2
|
| Related CAS # |
Mibefradil dihydrochloride;116666-63-8;Mibefradil dihydrochloride hydrate;1049728-52-0
|
| SMILES |
O=C(O[C@@]1(CCN(CCCC2=NC3=CC=CC=C3N2)C)[C@@H](C(C)C)C4=C(C=C(F)C=C4)CC1)COC
|
| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
|
| Solubility (In Vivo) |
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.
Injection Formulations
Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)(e.g. IP/IV/IM/SC) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). View More
Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). View More
Oral Formulation 3: Dissolved in PEG400 (Please use freshly prepared in vivo formulations for optimal results.) |
|---|
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.0176 mL | 10.0882 mL | 20.1763 mL | |
| 5 mM | 0.4035 mL | 2.0176 mL | 4.0353 mL | |
| 10 mM | 0.2018 mL | 1.0088 mL | 2.0176 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
Products are for research use only; We do not sell to patients
Copyright 2020 InvivoChem LLC | All Rights Reserved
COA