pexidartinib   Click here for help

GtoPdb Ligand ID: 8710

Synonyms: PLX-3397 | PLX3397 | Turalio®
Approved drug PDB Ligand
pexidartinib is an approved drug (FDA (2019))
Compound class: Synthetic organic
Comment: Pexidartinib is an orally available, multi-targeted inhibitor of the receptor tyrosine kinases, Fms-related tyrosine kinase 3 (FLT3), stem cell growth factor receptor (KIT) and colony stimulating factor 1 receptor (CSF1R), with potential antineoplastic activity [5]. Pexidartinib is compound P-0181 in patent US7893075 B2 [6].
It is active against wild type FLT3 and the FLT3 gatekeeper F691L resistance mutant, but its activity is vulnerable to mutations in the FLT3 activation loop [4].
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the CDK toolkit. All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 4
Hydrogen bond donors 2
Rotatable bonds 6
Topological polar surface area 66.49
Molecular weight 417.1
XLogP 4.58
No. Lipinski's rules broken 0
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES Clc1cnc2c(c1)c(c[nH]2)Cc1ccc(nc1)NCc1ccc(nc1)C(F)(F)F
Isomeric SMILES Clc1cnc2c(c1)c(c[nH]2)Cc1ccc(nc1)NCc1ccc(nc1)C(F)(F)F
InChI InChI=1S/C20H15ClF3N5/c21-15-6-16-14(10-28-19(16)29-11-15)5-12-2-4-18(26-7-12)27-9-13-1-3-17(25-8-13)20(22,23)24/h1-4,6-8,10-11H,5,9H2,(H,26,27)(H,28,29)
InChI Key JGWRKYUXBBNENE-UHFFFAOYSA-N
No information available.
Summary of Clinical Use Click here for help
The US FDA granted pexidartinib orphan drug designation for the proliferative disorder tenosynovial giant cell tumour (TGCT; a.k.a. pigmented villonodular synovitis or PVNS) in 2014. Following Priority Review, the FDA approved pexidartinib in August 2019, as a treament for symptomatic TGCT in adult patients with severe morbidity or functional limitations, and whose symptoms are not improved by surgery.
Mechanism Of Action and Pharmacodynamic Effects Click here for help
CSF1R is a primary driver in PVNS [1-3], and expression is elevated in most tumours of this type [5]. PLX3397 stabilises the kinase in an autoinhibited conformation, the clinical outcome of which is partial response or stable disease in patients with PVNS [5].