标签归档：letrozole

Letrozole(Synonyms: 来曲唑; CGS 20267)

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上海金畔生物科技有限公司为生命科学和医药研发人员提供生物活性分子抑制剂、激动剂、特异性抑制剂、化合物库、重组蛋白，专注于信号通路和疾病研究领域。

Letrozole (Synonyms: 来曲唑; CGS 20267) 纯度: 99.92%

Letrozole (CGS 20267) 是一种有效的，选择性的，可逆的和具有口服活性的非甾体类芳香化酶 (aromatase) 抑制剂，IC50 值为 11.5 nM。Letrozole 选择性抑制雌激素的生物合成，可用于乳腺癌的研究。

Letrozole(Synonyms: 来曲唑; CGS 20267)

Letrozole Chemical Structure

CAS No. : 112809-51-5

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10 mM * 1 mL in DMSO ￥715 In-stock
25 mg ￥650 In-stock
50 mg ￥900 In-stock
100 mg ￥1600 In-stock
200 mg ￥2800 In-stock
500 mg ￥4100 In-stock
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生物活性

Letrozole (CGS 20267) is a potent, selective, reversible and orally active non-steroidal inhibitor of aromatase, with an IC50 of 11.5 nM. Letrozole selective inhibits estrogen biosynthesis, and can be used for the research of breast cancer[1][2][3].

IC50 & Target

IC50: 11.5 nM (aromatase)[1]
体外研究
(In Vitro)

Letrozole (0.1-100 nM; 24-96 h) significantly inhibits growth of the MCF-7 epithelial breast cancer cells in a dose- and time-dependent manner[2].
Letrozole (10 nM) significantly suppresses the stimulatory effects of 4-androstene-3,17-dione or testosterone on MCF-7 cell proliferation[2].
Letrozole (10 nM; 24-48 h) suppresses the levels of secreted metalloproteinases (MMP‐2 and MMP‐9) in MCF-7 cells[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Cell Viability Assay[2]

Cell Line: MCF-7 cells
Concentration: 0.1, 1, 10, 100 nM
Incubation Time: 24, 48, 96 hours
Result: Inhibited cells growth in a dose- and time-dependent manner.

体内研究
(In Vivo)

Letrozole (3-300 μg/kg; oral gavage once daily for 6 weeks) exhibits anti-tumor effects in rats[3].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Adult female rats bearing mammary tumors[3]
Dosage: 3, 10, 30, 100, 300 μg/kg
Administration: Oral gavage once daily for 6 weeks
Result: Induced complete regression of mammary tumors, with an ED50 of 10-30 μg/kg/day.

Clinical Trial

分子量

285.30

Formula

C17H11N5
CAS 号

112809-51-5
中文名称

来曲唑
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 : 50 mg/mL (175.25 mM; Need ultrasonic)

配制储备液
浓度 溶剂体积 质量 1 mg 5 mg 10 mg
1 mM 3.5051 mL 17.5254 mL 35.0508 mL
5 mM 0.7010 mL 3.5051 mL 7.0102 mL
10 mM 0.3505 mL 1.7525 mL 3.5051 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 (7.29 mM); Clear solution

    此方案可获得 ≥ 2.08 mg/mL (7.29 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。

    将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

  • 2.

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

    Solubility: ≥ 2.08 mg/mL (7.29 mM); Clear solution

    此方案可获得 ≥ 2.08 mg/mL (7.29 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。

    将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明
  • 3.

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

    Solubility: ≥ 2.08 mg/mL (7.29 mM); Clear solution

    此方案可获得 ≥ 2.08 mg/mL (7.29 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。

*以上所有助溶剂都可在 上海金畔生物科技有限公司 网站选购。
参考文献

  • [1]. Bhatnagar AS, et, al. Highly selective inhibition of estrogen biosynthesis by CGS 20267, a new non-steroidal aromatase inhibitor. J Steroid Biochem Mol Biol. 1990 Dec 20;37(6):1021-7.

    [2]. Mitropoulou TN, et, al. Letrozole as a potent inhibitor of cell proliferation and expression of metalloproteinases (MMP-2 and MMP-9) by human epithelial breast cancer cells. Int J Cancer. 2003 Mar 20;104(2):155-60.

    [3]. Schieweck K, et, al. Anti-tumor and endocrine effects of non-steroidal aromatase inhibitors on estrogen-dependent rat mammary tumors. J Steroid Biochem Mol Biol. 1993 Mar;44(4-6):633-6.

所有产品仅用作科学研究或药证申报，我们不为任何个人用途提供产品和服务

Letrozole-d4 (Synonyms: 来曲唑 d4)

发表于由

上海金畔生物科技有限公司为生命科学和医药研发人员提供生物活性分子抑制剂、激动剂、特异性抑制剂、化合物库、重组蛋白，专注于信号通路和疾病研究领域。

Letrozole-d4  (Synonyms: 来曲唑 d4)

Letrozole-d4 是 Letrozole 的氘代物。Letrozole (CGS 20267) 是一种有效的，选择性的，可逆的和具有口服活性的非甾体类芳香化酶 (aromatase) 抑制剂，IC50 值为 11.5 nM。Letrozole 选择性抑制雌激素的生物合成，可用于乳腺癌的研究。

Letrozole-d4 (Synonyms: 来曲唑 d4)

Letrozole-d4 Chemical Structure

CAS No. : 1133712-96-5

规格 是否有货
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生物活性

Letrozole-d4 (CGS 20267-d4) is the deuterium labeled Letrozole. Letrozole (CGS 20267) is a potent, selective, reversible and orally active non-steroidal inhibitor of aromatase, with an IC50 of 11.5 nM. Letrozole selective inhibits estrogen biosynthesis, and can be used for the research of breast cancer[1][2][3].

体外研究
(In Vitro)

Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process. Deuteration has gained attention because of its potential to affect the pharmacokinetic and metabolic profiles of drugs[1].

Shanghai Jinpan Biotech Co Ltd has not independently confirmed the accuracy of these methods. They are for reference only.
分子量

289.33

Formula

C17H7D4N5
CAS 号

1133712-96-5
中文名称

来曲唑 d4
运输条件

Room temperature in continental US; may vary elsewhere.
储存方式

Please store the product under the recommended conditions in the Certificate of Analysis.
参考文献

  • [1]. Russak EM, et al. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216.

    [2]. Bhatnagar AS, et, al. Highly selective inhibition of estrogen biosynthesis by CGS 20267, a new non-steroidal aromatase inhibitor. J Steroid Biochem Mol Biol. 1990 Dec 20;37(6):1021-7.

    [3]. Mitropoulou TN, et, al. Letrozole as a potent inhibitor of cell proliferation and expression of metalloproteinases (MMP-2 and MMP-9) by human epithelial breast cancer cells. Int J Cancer. 2003 Mar 20;104(2):155-60.

    [4]. Schieweck K, et, al. Anti-tumor and endocrine effects of non-steroidal aromatase inhibitors on estrogen-dependent rat mammary tumors. J Steroid Biochem Mol Biol. 1993 Mar;44(4-6):633-6.

所有产品仅用作科学研究或药证申报，我们不为任何个人用途提供产品和服务