XL388

For research use only.

Catalog No.S7035

1 publication

Molecular Weight(MW): 455.5

XL388 is a highly potent, selective, ATP-competitive inhibitor of mTOR with IC50 of 9.9 nM, 1000-fold selectivity over the closely related PI3K kinases.

Selleck's XL388 has been cited by 1 publication

Autophagy, 2015, 11(10):1729-44

PubMed: 26506892

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Biological Activity

Description

XL388 is a highly potent, selective, ATP-competitive inhibitor of mTOR with IC50 of 9.9 nM, 1000-fold selectivity over the closely related PI3K kinases.

Targets

mTORC1 ^[1] ()	mTOR ^[2]	mTORC2 ^[1]
8 nM	9.9 nM	166 nM

In vitro

In MCF-7 cells, XL388 blocks mTORC1 phosphorylation of p70S6K (T389)with an IC50 value of 94 nM and blocks mTORC2 phosphorylationof AKT (S473) with an IC50 value of 350 nM. In vitro, XL388 inhibits the viability of solid and hematopoietic tumor cell lines. The proliferation IC50 is 1.37 μM in MCF-7 cell line. XL388 also synergizes with chemotherapeutics in cell-based assays to block cell viability. ^[1]

In vivo

When dosed orally once daily in mice, XL388 shows robust anti-tumor activity in multiple xenograft models including > 100% tumor growth inhibition in the MCF-7 xenograft model. ^[1] XL388 displays good pharmacokinetics and oral exposure in multiple species with moderate bioavailability. The mean plasma protein binding of XL388 in human, monkey, dog, rat, and mouse plasma is evaluated at 5 μM and is determined to be 86%, 90%, 89%, 85%, and 84%, respectively. Oral administration of XL388 to athymic nude mice implanted with human tumor xenografts afforded significant and dose-dependent antitumor activity. Strong inhibition of both mTORC1 and mTORC2 is achieved 4−8 h following administration orally at 100 mg/kg. Modest inhibition (39−45%) of phosphorylation of the PI3K target AKT (T308) is also observed 4−8 h post dose.^[2]

Protocol

Animal Research:^[2]	- Collapse Animal Models: MCF-7 xenograft tumors Dosages: 50, 100 mg/kg once daily Administration: Orally (Only for Reference)

References

Solubility (25°C)

In vitro	DMSO	23 mg/mL (50.49 mM)
	Water	Insoluble
	Ethanol	Insoluble
In vivo	Add solvents to the product individually and in order(Data is from Selleck tests instead of citations): 30% PEG400+0.5% Tween80+5% propylene glycol For best results, use promptly after mixing.	30 mg/mL

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information Download XL388 SDF

Molecular Weight	455.5
Formula	C₂₃H₂₂FN₃O₄S
CAS No.	1251156-08-7
Storage	3 years-20°C powder 2 years-80°C in solvent
Synonyms	N/A
Smiles	CC1=C(F)C(=CC=C1C(=O)N2CCOC3=CC=C(C=C3C2)C4=CN=C(N)C=C4)[S](C)(=O)=O

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Working concentration： mg/ml；

Method for preparing DMSO master liquid: ： mg drug pre-dissolved in μL DMSO (Master liquid 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 DMSO master liquid, next addμL PEG300， mix and clarify, next addμL Tween 80，mix and clarify, next add μL ddH₂O，mix and clarify.

Note：1.Please make sure the liquid is clear before adding the next solvent.
2.Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.

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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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mTOR Signaling Pathway Map

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XL388