BIX 02189

Catalog No.S1531 Batch:S153102

Technical Data

Formula	C₂₇H₂₈N₄O₂
Molecular Weight	440.54	CAS No.	1094614-85-3
Solubility (25°C)*	In vitro	Ethanol	80 mg/mL (181.59 mM)
		DMSO	60 mg/mL (136.19 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.)

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Biological Activity

Description

BIX02189 is a selective inhibitor of MEK5 with IC50 of 1.5 nM, also inhibits ERK5 catalytic activity with IC50 of 59 nM in cell-free assays, and does not inhibit closely related kinases MEK1, MEK2, ERK2, and JNK2.

Targets

MEK5 ^[1] (Cell-free assay)	ERK5 ^[1] (Cell-free assay)
1.5 nM	59 nM

In vitro

BIX02189 blocks MEK5 and ERK5 catalytic activity with IC50 values of 1.5 nM and 59 nM, respectively. They are more potent than the effect caused by BIX02188 with IC50 values of 4.3 nM and 810 nM, respectively. BIX02189 shows inhibitory activity against CSF1R (FMS) with IC50 of 46 nM but displays no activity against related kinases MEK1, MEK2, ERK1, p38α, JNK2, EGFR, and STK16 with IC50 values of >3.7 μM. Pretreatment with BIX02189 inhibits sorbitol-induced phosphorylation of ERK5 in HeLa cells in a dose dependent manner, and displays no inhibitory activity against the phosphorylation of ERK1/2, p38, and JNK1/2 MAPKs. Treatment with only BIX02189 for 24 hours in HeLa or HEK293 cells does not show any cytotoxic effect. BIX02189 inhibits MEK5/ERK5/MEF2C-driven luciferase expression in HeLa and HEK293 cells with IC50 values of 0.53 μM and 0.26 μM, respectively. This is a more significant than the effect caused by BIX02188. ^[1] BIX02189 inhibits the activation of ERK5, and suppresses C-terminus of Hsc70-interacting protein (CHIP) mediated p53 ubiquitination, leading to the reverse of the protective effect caused by laminar flow (L-flow) in human umbilical vein endothelial cells (HUVECs) exposed to 15d-PGJ2. ^[2] BIX02189 (10 uM) inhibits ERK5 phosphorylation, and reduces myocyte enhancer factor 2 (MEF2) transcriptional activity in neonatal rat cardiomyocytes (NRCMs) stimulated by isoproterenol. BIX02189 enhances the sorbitol induced apoptosis in NRCMs, confirming the protective role of ERK5 in cardiomyocytes. ^[3]

Protocol (from reference)

Kinase Assay:^{^[1]}	Catalytic assay MEK5 protein isolated from the baculovirus expression system is used to measure kinase activity utilizing PKLight ATP Detection Reagent. The assay is performed using 15 nM GST-MEK5 and 0.75 μM ATP in assay buffer consisting of 25 mM Hepes, pH 7.5, 10 mM MgCl₂, 50 mM KCl, 0.2% BSA, 0.01% CHAPS, 100 μM Na₃VO₄, 0.5 mM DTT and 1% DMSO in the presence of varying concentrations of BIX02189. The kinase reaction mixture is incubated for 90 minutes at room temperature followed by addition of 10 μL of ATP detection reagent for 15 minutes. The relative light unit (RLU) signal is measured and the RLU signals are converted to percent of control (POC) values for the determination of IC50 value.
Cell Assay:^{^[1]}	Cell lines HeLa cells Concentrations Dissolved in DMSO, final concentration ~10 μM Incubation Time Pretreatment for 1.5 hours Method The cells are serum starved for 20 hours prior to stimulation with sorbitol at a final concentration of 0.4 M for 20 minutes at 37 °C. BIX02189 is added 1.5 hours prior to the addition of sorbitol. The cells are harvested and lysed in 50 μL RIPA buffer containing Halt protease and phosphate inhibitors at 4 °C for 5-10 minutes. The lysates are centrifuged for 10 minutes at 14,000 rpm and 50 μL lysate is added to 50 μl 2× sample buffer and boiled for 4 minutes at 95 °C. Twenty microliters sample is run on SDS–PAGE 10% Tris-glycine gels and transferred to nitrocellulose. Western blotting is done with appropriate antibodies.

Kinase Assay:^{^[1]}

Catalytic assay
MEK5 protein isolated from the baculovirus expression system is used to measure kinase activity utilizing PKLight ATP Detection Reagent. The assay is performed using 15 nM GST-MEK5 and 0.75 μM ATP in assay buffer consisting of 25 mM Hepes, pH 7.5, 10 mM MgCl₂, 50 mM KCl, 0.2% BSA, 0.01% CHAPS, 100 μM Na₃VO₄, 0.5 mM DTT and 1% DMSO in the presence of varying concentrations of BIX02189. The kinase reaction mixture is incubated for 90 minutes at room temperature followed by addition of 10 μL of ATP detection reagent for 15 minutes. The relative light unit (RLU) signal is measured and the RLU signals are converted to percent of control (POC) values for the determination of IC50 value.

Cell Assay:^{^[1]}

Cell lines
HeLa cells
Concentrations
Dissolved in DMSO, final concentration ~10 μM
Incubation Time
Pretreatment for 1.5 hours
Method
The cells are serum starved for 20 hours prior to stimulation with sorbitol at a final concentration of 0.4 M for 20 minutes at 37 °C. BIX02189 is added 1.5 hours prior to the addition of sorbitol. The cells are harvested and lysed in 50 μL RIPA buffer containing Halt protease and phosphate inhibitors at 4 °C for 5-10 minutes. The lysates are centrifuged for 10 minutes at 14,000 rpm and 50 μL lysate is added to 50 μl 2× sample buffer and boiled for 4 minutes at 95 °C. Twenty microliters sample is run on SDS–PAGE 10% Tris-glycine gels and transferred to nitrocellulose. Western blotting is done with appropriate antibodies.

References

Customer Product Validation

: Data from [J Immunotoxicol, 2013, 10, 32-39]

: Data from [J Biol Chem, 2012, 287, 40722-31]

: Data from [J Biol Chem, 2012, 287, 40722-31]

: Data from [J Biol Chem, 2012, 287, 40722-31]

Selleck's BIX 02189 has been cited by 79 publications

Integrated drug response prediction models pinpoint repurposed drugs with effectiveness against rhabdomyosarcoma [ PLoS One, 2024, 19(1):e0295629]	PubMed: 38277404
Protective effects of macrophage-specific integrin α5 in myocardial infarction are associated with accentuated angiogenesis [ Nat Commun, 2023, 10.1038/s41467-023-43369-x]	PubMed: 37985764
Etiopathogenic role of ERK5 signaling in sarcoma: prognostic and therapeutic implications [ Exp Mol Med, 2023, 55(6):1247-1257]	PubMed: 37332046
The WNK1-ERK5 route plays a pathophysiological role in ovarian cancer and limits therapeutic efficacy of trametinib [ Clin Transl Med, 2023, 13(4):e1217]	PubMed: 37029785
The WNK1-ERK5 route plays a pathophysiological role in ovarian cancer and limits therapeutic efficacy of trametinib [ Clin Transl Med, 2023, 13(4):e1217]	PubMed: 37029785
Extracellular signal-Regulated Kinase 5 (ERK5) is required for the Yes-associated protein (YAP) co-transcriptional activity [ Cell Death Dis, 2023, 14(1):32]	PubMed: 36650140
MAP kinase ERK5 modulates cancer cell sensitivity to extrinsic apoptosis induced by death-receptor agonists [ Cell Death Dis, 2023, 14(11):715]	PubMed: 37919293
Extracellular signal-Regulated Kinase 5 (ERK5) is required for the Yes-associated protein (YAP) co-transcriptional activity [ Cell Death Dis, 2023, 14(1):32]	PubMed: 36650140
Extracellular signal-Regulated Kinase 5 (ERK5) is required for the Yes-associated protein (YAP) co-transcriptional activity [ Cell Death Dis, 2023, 14(1):32]	PubMed: 36650140
MAP kinase ERK5 modulates cancer cell sensitivity to extrinsic apoptosis induced by death-receptor agonists [ Cell Death Dis, 2023, 10.1038/s41419-023-06229-6]	PubMed: 37919293

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