Pimitespib (Synonyms:TAS-116)
目录号 : KM9110 CAS No. : 1260533-36-5 纯度 : 98%

Pimitespib (TAS-116) 是口服生物可利用的,ATP 竞争性的,高特异性的 HSP90α/HSP90β 抑制剂,Ki 值分别为 34.7 nM 和 21.3 nM。不抑制其他 HSP90 家族蛋白如 GRP94。Pimitespib 具有较低的眼部毒性。

规格 价格 是否有货 数量
5mg
In-stock
10mg
In-stock
50mg
In-stock
100mg
In-stock
200mg 询价 In-stock
500mg 询价 In-stock

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生物活性

Pimitespib (TAS-116) is an oral bioavailable, ATP-competitive, highly specific HSP90α/HSP90β inhibitor (Kis of 34.7 nM and 21.3 nM, respectively) without inhibiting other HSP90 family proteins such as GRP94. Pimitespib demonstrates less ocular toxicity.

体外研究

Pimitespib binds not only to the conventional-binding pockets as existing Hsp-90 inhibitors, but also to a novel-binding pocket. Such a unique binding mode makes Pimitespib highly specific for Hsp-90α/β without inhibiting other Hsp-90 family proteins such as GRP94 in endoplasmic reticulum or TRAP-1 in mitochondria.
Pimitespib (0-5 μM, 48 hours) inhibits human retinal pigment epithelial ARPE-19 cell lines and NCI-H929 MM cells growth.
More significant degradation of p-C-Raf and p-MEK1/2, HSP90 client proteins and key RAS/RAF/MEK pathway regulators, is triggered by Pimitespib (0.125-1 μM, 24 hours) than 17-AAG in INA6 and NCI-H929 MM cells.

Cell Viability Assay

Cell Line: Human retinal pigment epithelial ARPE-19 cell lines and NCI-H929 MM cells
Concentration: 0-5 μM
Incubation Time: 48 hours
Result: Inhibited NCI-H929 MM cells growth with an IC50 of 0.35 μM.

Western Blot Analysis

Cell Line: MM cell lines INA6 and NCI-H929 cells
Concentration: 0.125-1 μM
Incubation Time: 24 hours
Result: Targeted potently HSP90 client proteins including C-Raf and MEK1/2; as well as inhibited upregulation of HSP27 and overcomes 17-AAG resistance mechanisms.
体内研究

Pimitespib (12.0 mg/kg, p.o., 14 days) shows antitumor activity without inducing eye injury in rats. Pimitespib is distributed less in retina than in plasma in rats; consequently, Pimitespib does not produce any detectable photoreceptor injury. Pimitespib triggers enhanced in vivo anti-MM activities, both alone and in combination with PS-341 (BTZ), with a favorable safety profile. Mice treated with Pimitespib (10 mg/kg and 15 mg/kg, orally, 38 days), BTZ, or Pimitespib plus BTZ show significantly enhance growth inhibition versus the vehicle control group. Median overall survival of treated animals (Pimitespib, orally, 10 mg/kg=33 days, 15 mg/kg=37 days, BTZ=36 days, and the combination=56.5 days) is significantly longer than vehicle control.
The favorable pharmacokinetic profile of Pimitespib is reflected in its dose-dependent antitumor activity; the T/C (tumor volume of Pimitespib-treated mice vs. vehicle-treated mice) is 47%, 21%, and 9% for doses of 3.6 mg/kg, 7.1 mg/kg, and 14.0 mg/kg, respectively. Pimitespib is orally absorbed and has a bioavailability of almost 100% in mice, and 69.0% in rats. Pimitespib has moderate terminal elimination half-life (t1/2=8.2 h, 2.5 h, 4.4 h and 2.2 h for mouse (3.6 mg/kg, p.o.), mouse (7.1 mg/kg, p.o.), mouse (14.0 mg/kg, p.o.), rat (4 mg/kg, p.o.)). Pimitespib is more rapidly eliminated from retina (t1/2=3.4 hours) than the other HSP90 inhibitors (t1/2=7.1-19.1 hours).

Animal Model: Male F344 nude rats (6 weeks old) with established NCI-H1975 xenografts (6 weeks old)
Dosage: 12.0 mg/kg
Administration: Oral administration; daily; two weeks
Result: Led to tumor shrinkage. Showed antitumor activity without inducing eye injury in rats and did not cause ocular toxicity at the effective dose in the NCI-H1975 rat xenograft model.
Animal Model: CB17 SCID mice (48-54 days old) with murine xenograft model
Dosage: 10 and 15 mg/kg
Administration: Oral administration; 5 days a week; for 28 days
Result: Enhanced significantly growth inhibition versus the vehicle control group. The delay in tumor growth was greater in the combination-treated group compared with either monotherapy cohort.
Animal Model: Mice, Rats, and Dogs
Dosage: 3.0 mg/kg for dogs, 4.0 mg/kg for rats, 3.6, 7.1 and 14.0 mg/kg for mice
Administration: Oral administration; daily; 20 days
Result: Absorbed orally and had a bioavailability of almost 100% in mice, 69.0% in rats, and 73.9% in dogs without special formulation.
分子式
C25H26N8O
分子量
454.53
CAS号
1260533-36-5
运输条件

Room temperature in continental US; may vary elsewhere.

储存方式
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
溶解性数据
In Vitro: 

DMSO : 125 mg/mL (275.01 mM; Need ultrasonic)

配制储备液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 2.2001 mL 11.0004 mL 22.0007 mL
5 mM 0.4400 mL 2.2001 mL 4.4001 mL
10 mM 0.2200 mL 1.1000 mL 2.2001 mL
*

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液;一旦配成溶液,请分装保存,避免反复冻融造成的产品失效。
储备液的保存方式和期限:-80°C, 6 months; -20°C, 1 month。-80°C 储存时,请在 6 个月内使用,-20°C 储存时,请在 1 个月内使用。

In Vivo:

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液,再依次添加助溶剂:

——为保证实验结果的可靠性,澄清的储备液可以根据储存条件,适当保存;体内实验的工作液,建议您现用现配,当天使用; 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比;如在配制过程中出现沉淀、析出现象,可以通过加热和/或超声的方式助溶

  • 1.

    请依序添加每种溶剂: 10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.08 mg/mL (4.58 mM); Clear solution

    此方案可获得 ≥ 2.08 mg/mL (4.58 mM,饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀;向上述体系中加入50 μL Tween-80,混合均匀;然后继续加入 450 μL生理盐水定容至 1 mL。

  • 2.

    请依序添加每种溶剂: 10% DMSO    90% (20% SBE-β-CD in saline)

    Solubility: ≥ 2.08 mg/mL (4.58 mM); Clear solution

    此方案可获得 ≥ 2.08 mg/mL (4.58 mM,饱和度未知) 的澄清溶液。

    以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中,混合均匀。

  • 3.

    请依序添加每种溶剂: 10% DMSO    90% corn oil

    Solubility: ≥ 2.08 mg/mL (4.58 mM); Clear solution

    此方案可获得 ≥ 2.08 mg/mL (4.58 mM,饱和度未知) 的澄清溶液,此方案不适用于实验周期在半个月以上的实验。

    以 1 mL 工作液为例,取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中,混合均匀。

临床试验
The molarity calculator equation
Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)
The dilution calculator equation
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2
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