CFI-400945

Catalog No.S7552 Batch:S755202

Technical Data

Formula	C₃₃H₃₄N₄O₃
Molecular Weight	534.65	CAS No.	1338806-73-7
Solubility (25°C)*	In vitro	DMSO	100 mg/mL (187.03 mM)
		Ethanol	100 mg/mL (187.03 mM)
		Water	Insoluble
* <1 mg/ml means slightly soluble or insoluble. * 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. * Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description

CFI-400945 is an orally active, potent and selective polo-like kinase 4(PLK4) inhibitor with Ki value of 0.26 nM.

Targets

PLK4 ^[1] (Cell-free assay)	TrkA ^[1] (Cell-free assay)	TrkB ^[1] (Cell-free assay)	Tie-2 ^[1] (Cell-free assay)	Aurora B ^[1] (Cell-free assay)	View More
2.8 nM	6 nM	9 nM	22 nM	98 nM	View More

In vitro

CFI-400945 is a potent, orally active antitumor agent with the IC50 and Ki values of 2.8 and 0.26 nM, respectively. No significant inhibition against PLKs 1-3 is observed for CFI-400945 at a concentration of 50 μM. CFI-400945 can attenuate the growth of breast cell line, as well as other tumor cell lines significantly. CFI-400945 selectively inhibits PLK4 in cells, but also has certain activity against AURKB, TRKA, TRKB and Tie2/TEK (only 10 kinases showed more than 50% inhibition among 290 kinases). The cytokinesis failure and subsequent polyploidization by CFI-400945 treatment indicate that the cell death in cancer cell lines is at least partly achieved through inhibition of AURKB. No significant inhibition is observed for PLKs 1-3 (IC50s > 50 μM) probably due to the most divergent structure of PLK4 compared to other polo-like kinases 1-3^[2]. Cancer cells treated with CFI-400945 exhibit effects consistent with PLK4 kinase inhibition, including dysregulated centriole duplication, mitotic defects, and cell death^[3].

In vivo

CFI-400945 is well tolerated in breast cancer xenograft models, in particular those deficient in the tumor suppressor PTEN^[2]. Upon intermittent oral dosing, in a mouse model of colon cancer, CFI-400945 is an effective inhibitor of HCT116 tumor growth and was well tolerated^[1]. CFI-400945 is absorbed rapidly after oral administration, reaching maximum plasma concentrations (Cmax) of 0.25-11.68 μg/mL for the doses tested (3.75-104 mg/kg). CFI-400945 can inhibit the growth of a range of tumor types and may be effective in a clinical setting even in advanced tumors. Following oral administration of efficacious doses of CFI-400945 in mice, plasma levels of CFI-400945 are sustained and remained above both the EC50 value for half-maximal inhibition of cellular PLK4 autophosphorylation and growth inhibition GI50 values for 24 hr. Moreover, CFI-400945 demonstrates dose-dependent antitumor activity. Analysis of xenograft tumors from mice treated with an efficacious dose of CFI-400945 shows a pharmacodynamic effect that is suggestive of complete rather than partial inhibition of PLK4 kinase activity^[3].

Protocol (from reference)

Cell Assay:^{^[1]}	Cell lines MDA-MB-468, MCF-7, HCC1954, MDA-MB-231, SKBr-3, Cal-51, and BT-20 breast cancer cells Concentrations 10 nM to 50 μM Incubation Time 5 d Method MDA-MB-468, MCF-7, HCC1954, MDA-MB-231, SKBr-3, Cal-51, and BT-20 breast cancer cells are seeded into 96-well plates at 3000, 4000, 4000, 2500, 4000, 3000, and 6000 cells per 80 μL, respectively, 24 h before compound overlay and cultured at 37℃ and 5% CO2. Compounds are prepared as 10 mM stocks in 100% DMSO. Each 10 mM stock is diluted with DMEM (Dulbecco's Modified Eagle's Medium) cell growth medium containing 10% FBS such that the final concentrations ranged from 50 nM to 250 μM. Aliquots (20 μL) from each concentration are overlaid to 80 μL of preseeded cells to achieve final concentrations of 10 nM to 50 μM. After 5 d, the cells are fixed in situ by gently removing the culture media and adding 50 μL of ice-cold 10% trichloroacetic acid (TCA) per well and incubation at 4 °C for 30 min. The plates are washed with water five times and allowed to air-dry for 5 min. Then 50 μL of 0.4% (w/v) sulforhodamine B (SRB) solution in 1% (v/v) acetic acid is added to each well, followed by incubation for 30 min at rt. The plates are washed four times with 1% acetic acid to remove unbound SRB and air-dried for 5 min. The SRB is solubilized with 100 μL of 10 mM Tris pH 10.5 per well, and absorbance is read at 570 nm. The percentage (%) of relative inhibition of cell viability is calculated.
Animal Study:^{^[1]}	Animal Models Adult female athymic CD1 nude mice Dosages 10 mg/kg Administration via oral gavage

Cell Assay:^{^[1]}

Cell lines
MDA-MB-468, MCF-7, HCC1954, MDA-MB-231, SKBr-3, Cal-51, and BT-20 breast cancer cells
Concentrations
10 nM to 50 μM
Incubation Time
5 d
Method
MDA-MB-468, MCF-7, HCC1954, MDA-MB-231, SKBr-3, Cal-51, and BT-20 breast cancer cells are seeded into 96-well plates at 3000, 4000, 4000, 2500, 4000, 3000, and 6000 cells per 80 μL, respectively, 24 h before compound overlay and cultured at 37℃ and 5% CO2. Compounds are prepared as 10 mM stocks in 100% DMSO. Each 10 mM stock is diluted with DMEM (Dulbecco's Modified Eagle's Medium) cell growth medium containing 10% FBS such that the final concentrations ranged from 50 nM to 250 μM. Aliquots (20 μL) from each concentration are overlaid to 80 μL of preseeded cells to achieve final concentrations of 10 nM to 50 μM. After 5 d, the cells are fixed in situ by gently removing the culture media and adding 50 μL of ice-cold 10% trichloroacetic acid (TCA) per well and incubation at 4 °C for 30 min. The plates are washed with water five times and allowed to air-dry for 5 min. Then 50 μL of 0.4% (w/v) sulforhodamine B (SRB) solution in 1% (v/v) acetic acid is added to each well,

followed by incubation for 30 min at rt. The plates are washed four times with 1% acetic acid to remove unbound SRB and air-dried for 5 min. The SRB is solubilized with 100 μL of 10 mM Tris pH 10.5 per well, and absorbance is read at 570 nm. The percentage (%) of relative inhibition of cell viability is calculated.

Animal Study:^{^[1]}

Animal Models
Adult female athymic CD1 nude mice
Dosages
10 mg/kg
Administration
via oral gavage

References

Selleck's CFI-400945 has been cited by 8 publications

PLK4 as a potential target to enhance radiosensitivity in triple-negative breast cancer [ Radiat Oncol, 2024, 19(1):24]	PubMed: 38365710
Molecular landscape and functional characterization of centrosome amplification in ovarian cancer [ Nat Commun, 2023, 14(1):6505]	PubMed: 37845213
Polo-like kinase 4 inhibitor CFI-400945 inhibits carotid arterial neointima formation but increases atherosclerosis [ Cell Death Discov, 2023, 9(1):49]	PubMed: 36750553
Polo-like kinase 4 inhibitor CFI-400945 inhibits carotid arterial neointima formation but increases atherosclerosis [ Cell Death Discov, 2023, 9(1):49]	PubMed: 36750553
The phytochemical, corynoline, diminishes Aurora kinase B activity to induce mitotic defect and polyploidy [ Biomed Pharmacother, 2022, 147:112645]	PubMed: 35051862
Inhibition of Polo-like kinase 4 induces mitotic defects and DNA damage in diffuse large B-cell lymphoma [ Cell Death Dis, 2021, 12(7):640]	PubMed: 34162828
Inhibition of PLK4 might enhance the anti-tumour effect of bortezomib on glioblastoma via PTEN/PI3K/AKT/mTOR signalling pathway. [ J Cell Mol Med, 2020, 10.1111/jcmm.14996]	PubMed: 32126150
A cis-eQTL genetic variant in PLK4 confers high risk of hepatocellular carcinoma [ Cancer Med, 2019, 8(14):6476-6484]	PubMed: 31489978

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