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米贝拉地尔

米贝拉地尔用途

Mibefradil dihydrochloride 是一种钙离子通道 (calcium channel) 抑制剂,选择性作用于 T 型 Ca2+通道,作用于 T 型和 L 型通道,IC50 分别为 2.7 μM 和 18.6 μM。

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米贝拉地尔名称

[ CAS 号 ]:
116666-63-8

[ 中文名 ]:
米贝拉地尔

[ 英文名 ]:
Mibefradil dihydrochloride

[英文别名 ]:

Mibefradil hydrochloride
Mibefradil (dihydrochloride)

米贝拉地尔生物活性

[ 描述 ]:

Mibefradil dihydrochloride 是一种钙离子通道 (calcium channel) 抑制剂,选择性作用于 T 型 Ca2+通道,作用于 T 型和 L 型通道,IC50 分别为 2.7 μM 和 18.6 μM。

[ 相关类别 ]:

信号通路 >> 跨膜转运 >> 钙通道

研究领域 >> 心血管疾病

[ 靶点 ]

IC50: 2.7 μM (T-type calcium channel), 18.6 μM (L-type calcium channel)[1]

[体外研究]

Mibefradil dihydrochloride可逆地抑制T型和L型电流,IC50值分别为2.7和18.6μM。 L型电流的抑制是电压依赖性的,而T型电流的抑制则不是。 Ro 40-5967阻断T型电流已经处于-100 mV的保持电位[1]。在更高的浓度(20μM)下,Mibefradil降低了兴奋性结电势的幅度(降低了37±10％),降低了再极化(44±16％)并引起显着的膜电位去极化(从-83±1mV至-71±5mV)。在较高的Mibefradil浓度(20μM)下,存在显着的膜电位去极化和再极化的减慢。 Mibefradil的这些作用与K +通道抑制一致,已显示其在人成肌细胞和其他细胞中发生[2]。

[体内研究]

在4周治疗期后,24-26周龄C57BL/6J小鼠的听力阈值不同。与盐水治疗组相比,Mibefradil治疗组和贝尼地平治疗组的24 kHz听力阈值显着降低(P <0.05)[3]。与盐水治疗组相比,接受Mibefradil或Ethosuximide的大鼠脊髓和DRG中CaV3.2表达显着降低[4]。

[动物实验]

小鼠[3]将30只雄性C57BL / 6J小鼠（年龄6-8周）随机分为三组，用于检测三种钙通道受体亚单位α1G，α1H和α1I，采用逆转录 - 定量聚合酶链反应（ RT-qPCR的）。此外，将另外30只C57BL / 6J雄性小鼠（年龄24-26周）随机分配到三个治疗组：盐水，Mibefradil和贝尼地平。每组在治疗后进行听觉脑干记录（ABR）和畸变产物耳声发射（DPOAE）测试。将米非拉地尔和贝尼地平溶解在生理盐水溶液中。初步实验导致选择30mg / kg /天Mibefradil和10mg / kg /天贝尼地平的剂量。通过强饲法将药物连续四周给予小鼠。大鼠[4]雄性Sprague-Dawley大鼠（200-250g）用于右L5 / 6SNL以诱导神经性疼痛。在手术后7天开始鞘内注入盐水或TCC阻滞剂[Mibefradil（0.7μg/ h）或Ethosuximide（60μg/ h）]。荧光免疫组织化学和蛋白质印迹用于确定CaV3.2的表达模式和蛋白质水平。苏木精 - 伊红和甲苯胺蓝染色用于评估测试药剂的神经毒性。

[参考文献]

[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.

[相关活性小分子]

米贝拉地尔物理化学性质

[ 沸点 ]:
647.6ºC at 760mmHg

[ 分子式 ]:
C₂₉H₄₀Cl₂FN₃O₃

[ 分子量 ]:
568.551

[ 闪点 ]:
345.5ºC

[ 精确质量 ]:
567.243103

[ PSA ]:
67.45000

[ LogP ]:
6.87490

[ 蒸汽压 ]:
1.17E-16mmHg at 25°C

[ 储存条件 ]:
2-8℃

米贝拉地尔MSDS

详细MSDS(安全技术说明书)

米贝拉地尔毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: AI8977250

CHEMICAL NAME :: Acetic acid, methyl-, 2-(2-((3-(1H-benzimidazol-2-yl)propyl)methylamino)eth yl)-6-fluoro- 1,2,3,4-tetrahydro-1-(1-methylethyl)-2-naphthalenyl ester, dihydrochloride, (1S-cis)-

CAS REGISTRY NUMBER :: 116666-63-8

LAST UPDATED :: 199712

DATA ITEMS CITED :: 5

MOLECULAR FORMULA :: C29-H38-F-N3-O3.2Cl-H

MOLECULAR WEIGHT :: 568.62

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: >800 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CDREEA Cardiovascular Drug Reviews. (Raven Press, 1185 Avenue of the Americas, New York, NY 10036) V.6- 1988- Volume(issue)/page/year: 9,4,1991

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 23 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CDREEA Cardiovascular Drug Reviews. (Raven Press, 1185 Avenue of the Americas, New York, NY 10036) V.6- 1988- Volume(issue)/page/year: 9,4,1991

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: >800 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CDREEA Cardiovascular Drug Reviews. (Raven Press, 1185 Avenue of the Americas, New York, NY 10036) V.6- 1988- Volume(issue)/page/year: 9,4,1991

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 35 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CDREEA Cardiovascular Drug Reviews. (Raven Press, 1185 Avenue of the Americas, New York, NY 10036) V.6- 1988- Volume(issue)/page/year: 9,4,1991 ** REPRODUCTIVE DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 270 mg/kg

SEX/DURATION :: female 10-12 day(s) after conception

TOXIC EFFECTS :: Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants) Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus) Reproductive - Specific Developmental Abnormalities - cardiovascular (circulatory) system

REFERENCE :: REPTED Reproductive Toxicology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.1- 1987- Volume(issue)/page/year: 11,207,1997

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米贝拉地尔安全信息

[ WGK德国 ]:
3

[ RTECS号 ]:
AI8977250