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LOXO-101

原肌球蛋白受体激酶（TRK）抑制剂，Larotrectinib (LOXO-101) sulfate 是一种 ATP 竞争性的、口服选择性抑制剂，对原肌凝蛋白相关激酶 (TRK) 家族受体的三个亚型 (TRKA，B 和C) 具有纳摩尔级别的 50% 抑制浓度。

目录号: PC16134 纯度: ≥98%

CAS No. :1223405-08-0

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中文名称	LOXO-101
中文别名	(3S)-N-[5-[(2R)-2-(2,5-二氟苯基)-1-吡咯烷基]吡唑并[1,5-A]嘧啶-3-基]-3-羟基-1-吡咯烷甲酰胺硫酸盐;P4465消泡剂水性涂料油墨消泡剂;LOXO-101 (sulfate)
英文名称	LOXO-101
英文别名	LOXO-101 (sulfate);Larotrectinib sulfate;LOXO101 sulfate;P4465消泡剂水性涂料油墨消泡剂;(3R)-N-[5-[(2R)-2-(2,5-Difluorophenyl)pyrrolidin-1-yl]pyrazolo[1,5-a]pyrimidin-3-yl]-3-hydroxypyrrol;(S)-N-(5-((R)-2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)-3-hydroxypyrrolidine-1-carboxamide sulfate;RDF76R62ID;(3S)-N-[5-[(2R)-2-(2,5-difluorophenyl)pyrrolidin-1-yl]pyrazolo[1,5-a]pyrimidin-3-yl]-3-hydroxypyrrolidine-1-carboxamide;sulfuric acid;Vitrakvi (TN);1-Pyrrolidinecarboxamide, N-(5-((2R)-2-(2,5-difluorophenyl)-1-pyrrolidinyl)pyrazolo(1,5-a)pyrimidin-3-yl)-3-hyd
Cas No.	1223405-08-0
分子式	C₂₁H₂₄F₂N₆O₆S
分子量	526.51
包装储存	4°C, sealed storage, away from moisture *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

生物活性

Larotrectinib sulfate (LOXO-101 sulfate; ARRY-470 sulfate) is an ATP-competitive oral, selective inhibitor of the tropomyosin-related kinase (TRK) family receptors, with low nanomolar 50% inhibitory concentrations against all three isoforms (TRKA, B, and C).

性状

Solid

IC50 & Target[1][2]

TrkA

TrkB

TrkC

体外研究(In Vitro)

Larotrectinib (LOXO-101) is an ATP-competitive oral inhibitor of the tropomyosin-related kinase (TRK) family of receptor kinases (TRKA, B, and C), with low nanomolar 50% inhibitory concentrations against all three isoforms, and 1,000-fold or greater selectivity relative to other kinases. Measurement of proliferation following treatment with Larotrectinib (LOXO-101) demonstrates a dose-dependent inhibition of cell proliferation in all three cell lines. The IC₅₀ is less than 100 nM for CUTO-3.29 and less than 10 nM for KM12 and MO-91 consistent with the known potency of this drug for the TRK kinase family.

Medlife has not independently confirmed the accuracy of these methods. They are for reference only.

体内研究(In Vivo)

In rat and monkey studies, Larotrectinib (LOXO-101) demonstrates 33-100% oral bioavailability and 60-65% plasma protein binding. It has low brain penetration, and is well tolerated in 28 day (d) GLP toxicology studies. A single dose (30 mg/kg) of Larotrectinib (LOXO-101) reduces tyrosine phosphorylation of TRKA and downstream signal transduction (pERK) in the tumor >80%. Athymic nude mice injected with KM12 cells are treated with Larotrectinib sulfate orally daily for 2 weeks. Dose-dependent tumor inhibition is observed demonstrating the ability of this selective compound to inhibit tumor growth in vivo. Larotrectinib (LOXO-101) (200mg/kg/day p.o for six weeks) reduces leukemic infiltration to undetectable levels in the bone marrow and spleen compared to vehicle-treated mice. Mice treated with Larotrectinib sulfate are still alive and leukemia-free four weeks after the cessation of treatment, as determined by Xenogen imaging.

Medlife has not independently confirmed the accuracy of these methods. They are for reference only.

运输条件

Room temperature or refrigerated transportation.

储存方式

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

ClinicalTrial

参考文献

[1]. Karyn Bouhana, et al. LOXO-101, a pan TRK inhibitor, For The Treatment Of TRK-driven Cancers.

[2]. Nagasubramanian R, et al. Infantile Fibrosarcoma With NTRK3-ETV6 Fusion Successfully Treated With the Tropomyosin-Related Kinase Inhibitor LOXO-101. Pediatr Blood Cancer. 2016 Aug;63(8):1468-70. [Information]

[3]. Kathryn G, et al. Genetic Modeling and Therapeutic Targeting of ETV6-NTRK3 with Loxo-101in Acute Lymphoblastic Leukemia. Blood 2016 128:278.

[4]. Doebele RC, et al. An Oncogenic NTRK Fusion in a Patient with Soft-Tissue Sarcoma with Response to the Tropomyosin-Related Kinase Inhibitor LOXO-101. Cancer Discov. 2015 Oct;5(10):1049-57. [Information]

溶解度数据

体外研究:

DMSO : 50 mg/mL (94.96 mM; Need ultrasonic)

H₂O : 2 mg/mL (3.80 mM; ultrasonic and adjust pH to 2 with 1M HCl)

配制储备溶液

浓度溶剂体积质量	1 mg	5 mg	10 mg

1 mM	1.8993 mL	9.4965 mL	18.9930 mL
5 mM	0.3799 mL	1.8993 mL	3.7986 mL
10 mM	0.1899 mL	0.9496 mL	1.8993 mL

产品不同，其溶解度不同。建议根据产品选择合适的溶剂配制储备溶液；配成溶液后，建议分装保存，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 (sealed storage, away from moisture)。-80°C 储存时，建议在 6 个月内使用，-20°C 储存时，建议在 1 个月内使用。

体内研究:

建议根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都建议先按照 体外研究 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.

建议依照次序添加每种溶剂： PBS
Solubility: 12.5 mg/mL (23.74 mM); Clear solution; Need ultrasonic
2.

建议依照次序添加每种溶剂： 10% DMSO 40% PEG300 5% Tween-80 45% saline
Solubility: ≥ 3.25 mg/mL (6.17 mM); Clear solution

此方案可获得 ≥ 3.25 mg/mL (6.17 mM，饱和度未知) 的澄清溶液。
以 1 mL 工作液为例，取 100 μL 32.5 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 ddH?O 中，得到澄清透明的生理盐水溶液
3.

建议依照次序添加每种溶剂： 10% DMSO 90% (20% SBE-β-CD in saline)
Solubility: ≥ 3.25 mg/mL (6.17 mM); Clear solution

此方案可获得 ≥ 3.25 mg/mL (6.17 mM，饱和度未知) 的澄清溶液。
以 1 mL 工作液为例，取 100 μL 32.5 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
4.

建议依照次序添加每种溶剂： 10% DMSO 90% corn oil
Solubility: ≥ 3.25 mg/mL (6.17 mM); Clear solution

此方案可获得 ≥ 3.25 mg/mL (6.17 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 32.5 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。
5.

建议依照次序添加每种溶剂： 5% DMSO 40% PEG300 5% Tween-80 50% saline
Solubility: ≥ 2.5 mg/mL (4.75 mM); Clear solution
6.

建议依照次序添加每种溶剂： 5% DMSO 95% (20% SBE-β-CD in saline)
Solubility: ≥ 2.5 mg/mL (4.75 mM); Clear solution

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产品使用指南

Data Sheet

1：一般建议：溶解度为Medlife测试数据，可能与文献描述存在差异。这是由于生产工艺和批次不同产生的正常现象。为了使其更好的溶解，请用37℃加热试管并在超声波水浴中震动片刻。不同批次产品溶解度各有差异，仅做参考，具体以实验方案为准。

2：储存条件：粉末-20°C一般情况可以保存3年，溶于溶剂-80°C一般情况可以保存1年。不同产品及不同批次产品可能存在差异，请细致阅读产品信息，并辅助参考相关文献描述。

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