BX-912

Catalog No.S1275 Batch:S127501

Technical Data

Formula

C₂₀H₂₃BrN₈O

Molecular Weight

471.35

CAS No.

702674-56-4

Solubility (25°C)*

In vitro

DMSO

94 mg/mL (199.42 mM)

Ethanol

94 mg/mL (199.42 mM)

Water

Insoluble

In vivo (Add solvents to the product individually and in order)

Clear solution

30%PEG400 1 0.5%Tween80 2 5%propylene glycol

30.0mg/ml

Taking the 1 mL working solution as an example, add 300 μL of 100 mg/ml clarified PEG400 stock solution to 5 μL of Tween80, mix evenly to clarify it; add 50 μL Propylene glycol to the above system, mix evenly to clarify it; then continue to add 645 μL ddH2O to adjust the volume. to 1 mL. The mixed solution should be used immediately for optimal results.

* <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

BX912 is a potent and specific PDK1 inhibitor with IC50 of 12 nM, 9- and 105- fold greater selectivity for PDK1 than PKA and PKC in cell-free assays, respectively. In comparison to GSK3β, selectivity for PDK1 is 600-fold.

Targets

PDK-1 ^[1] (Cell-free assay)	PKA ^[1] (Cell-free assay)	KDR ^[1] (Cell-free assay)	CDK2/CyclinE ^[1] (Cell-free assay)	Chk1 ^[1] (Cell-free assay)	View More
12 nM	110 nM	410 nM	650 nM	830 nM	View More

In vitro

BX912 prevents ChcK1, PKA, c-kit, and KDR with IC50 of 0.83, 0.11, 0.85, and 0.41 μM, resepectively. BX912 blocks PDK1/Akt signaling in tumor cells and suppresses the anchorage-dependent growth of a variety of tumor cell lines (such as PC-3 cells ) in culture or induces apoptosis. A number of cancer cell lines (such as MDA-468 breast cancer) with elevated Akt activity are >30-fold more sensitive to growth inhibition by PDK1 inhibitor BX912 in soft agar than on tissue culture plastic, consistent with the cell survival function of the PDK1/Akt signaling pathway, which is particularly important for unattached cells. BX912 potently blocks PDK1 enzyme activity in a direct kinase assay format, although BX912 fails to block preactivated AKT2 activity (IC50 > 10 μM). Therefore, BX-912 is a direct inhibitor of PDK1. BX912 is a competitive inhibitor of PDK1 activity with respect to its substrate, ATP, suggesting that BX912 binds to the ATP binding pocket of PDK1. The aminopyrimidine backbone of BX912 adopts a similar orientation in the active site of PDK1. BX912 promotes a pronounced increase in the population of MDA-468 cells with 4 N DNA content, indicative of a block at the G2/M phase of the cell cycle. BX912 also potently inhibits the growth of HCT-116 cells in soft agar, showing a 96% inhibitory effect at a dose of 1 μM. BX912 potently inhibits the growth of PC-3 cells in soft agar, displaying IC50 of 0.32 μM. ^[1]

Protocol (from reference)

Kinase Assay:^{^[1]}	Kinase assays PDK1 is assayed in a direct kinase assay and a coupled assay format measuring PDK1- and PtdIns-3,4-P2-mediated activation of AKT2. For the coupled assay, the final assay mixture (60 μL) contained: 15 mM MOPS, pH 7.2, 1 mg/mL bovine serum albumin, 18 mM β-glycerol phosphate, 0.7 mM dithiothreitol, 3 mM EGTA, 10 mM MgOAc, 7.5 μM ATP, 0.2 μCi of [γ- ³³P]ATP, 7.5 μM biotinylated peptide substrate (biotin-ARRRDGGGAQPFRPRAATF), 0.5 μL of PtdIns-3,4-P2-containing phospholipid vesicles, 60 pg of purified recombinant human PDK1, and 172 ng of purified recombinant human AKT2. After incubation for 2 hours at room temperature, the biotin-labeled peptide is captured from 10 μL of the assay mixture on streptavidin-coated SPA beads, and product formation is measured by scintillation proximity in a Wallac MicroBeta counter. The product formed is proportional to the time of incubation and to the amount of PDK1 and inactive AKT2 added. PDK1 is added at suboptimal levels so that the assay could sensitively detect inhibitors of AKT2 activation as well as direct inhibitor BX912 of PDK1 or AKT2. To measure PDK1 activity directly, the final assay mixture (60 μL) contained 50 mM Tris-HCl, pH 7.5, 0.1 mM EGTA, 0.1 mM EDTA, 0.1% β-mercaptoethanol, 1 mg/mL bovine serum albumin, 10 mM MgOAc, 10 μM ATP, 0.2 μCi of [γ-³³P]ATP, 7.5 μM substrate peptide (H2N-ARRRGVTTKTFCGT), and 60 ng of purified recombinant human PDK1. After 4 hours at room temperature, 25 mM EDTA is added and a portion of the reaction mixture on P81 phosphocellulose paper is spotted. The filter paper is washed three times with 0.75% phosphoric acid and once with acetone. After drying, the filter-bound labeled peptide is quantified using a phosphorimager.
Cell Assay:^{^[1]}	Cell lines MDA-468, MDA-453 Concentrations 0.001-1 μM Incubation Time 72 hours Method Cells such as MDA-468, MDA-453 are seeded at a low density (1.5-3 × 10³ cells/well, 0.1 mL/well, 96-well plates) and are incubated overnight. BX912 treatments are made by adding 10 μL/well of the compound in 1% dimethyl sulfoxide and growth medium (final concentration of dimethyl sulfoxide, 0.1%), followed by brief shaking. Treated cells are incubated for 72 hours, and viability is measured by the addition of 10 μL of the metabolic dye WST-1. The WST-1 signal is read in a plate reader at 450 nm, and a no cell, or zero time cell, background is subtracted to calculate the net signal.

Kinase Assay:^{^[1]}

Kinase assays
PDK1 is assayed in a direct kinase assay and a coupled assay format measuring PDK1- and PtdIns-3,4-P2-mediated activation of AKT2. For the coupled assay, the final assay mixture (60 μL) contained: 15 mM MOPS, pH 7.2, 1 mg/mL bovine serum albumin, 18 mM β-glycerol phosphate, 0.7 mM dithiothreitol, 3 mM EGTA, 10 mM MgOAc, 7.5 μM ATP, 0.2 μCi of [γ- ³³P]ATP, 7.5 μM biotinylated peptide substrate (biotin-ARRRDGGGAQPFRPRAATF), 0.5 μL of PtdIns-3,4-P2-containing phospholipid vesicles, 60 pg of purified recombinant human PDK1, and 172 ng of purified recombinant human AKT2. After incubation for 2 hours at room temperature, the biotin-labeled peptide is captured from 10 μL of the assay mixture on streptavidin-coated SPA beads, and product formation is measured by scintillation proximity in a Wallac MicroBeta counter. The product formed is proportional to the time of incubation and to the amount of PDK1 and inactive AKT2 added. PDK1 is added at suboptimal levels so that the assay could sensitively detect inhibitors of AKT2 activation as well as direct inhibitor BX912 of PDK1 or AKT2. To measure PDK1 activity directly, the final assay mixture (60 μL) contained 50 mM Tris-HCl, pH 7.5, 0.1 mM EGTA, 0.1 mM EDTA, 0.1% β-mercaptoethanol, 1 mg/mL bovine serum albumin, 10 mM MgOAc, 10 μM ATP, 0.2 μCi of [γ-³³P]ATP, 7.5 μM substrate peptide (H2N-ARRRGVTTKTFCGT), and 60 ng of purified recombinant human PDK1. After 4 hours at room temperature, 25 mM EDTA is added and a portion of the reaction mixture on P81 phosphocellulose paper is spotted. The filter paper is washed three times with 0.75% phosphoric acid and once with acetone. After drying, the filter-bound labeled peptide is quantified using a phosphorimager.

Cell Assay:^{^[1]}

Cell lines
MDA-468, MDA-453
Concentrations
0.001-1 μM
Incubation Time
72 hours
Method
Cells such as MDA-468, MDA-453 are seeded at a low density (1.5-3 × 10³ cells/well, 0.1 mL/well, 96-well plates) and are incubated overnight. BX912 treatments are made by adding 10 μL/well of the compound in 1% dimethyl sulfoxide and growth medium (final concentration of dimethyl sulfoxide, 0.1%), followed by brief shaking. Treated cells are incubated for 72 hours, and viability is measured by the addition of 10 μL of the metabolic dye WST-1. The WST-1 signal is read in a plate reader at 450 nm, and a no cell, or zero time cell, background is subtracted to calculate the net signal.

References

[1] Feldman RI, et al. J Biol Chem. 2005, 280(20), 19867-19874.

Customer Product Validation

: , , Oncotarget, 2014, 5(21):10732-44.

: Data from [Data independently produced by , , Am J Respir Cell Mol Biol, 2018, 59(3):295-305]

Selleck's BX-912 has been cited by 14 publications

Deregulation and epigenetic modification of BCL2-family genes cause resistance to venetoclax in hematologic malignancies [ Blood, 2022, blood.2021014304]	PubMed: 35704690
The 3-phosphoinositide-dependent protein kinase 1 is an essential upstream activator of protein kinase A in malaria parasites [ PLoS Biol, 2021, 19(12):e3001483]	PubMed: 34879056
Effects of inhibiting PDK‑1 expression in bone marrow mesenchymal stem cells on osteoblast differentiation in vitro [ Mol Med Rep, 2021, 23(2)118]	PubMed: 33300048
Application of a Biphasic Mathematical Model of Cancer Cell Drug Response for Formulating Potent and Synergistic Targeted Drug Combinations to Triple Negative Breast Cancer Cells. [ Cancers (Basel), 2020, 27;12(5)pii: E1087]	PubMed: 32349331
Biphasic Mathematical Model of Cell-Drug Interaction That Separates Target-Specific and Off-Target Inhibition and Suggests Potent Targeted Drug Combinations for Multi-Driver Colorectal Cancer Cells. [ Cancers (Basel), 2020, 13;12(2) pii: E436]	PubMed: 32069833
Gene Essentiality Profiling Reveals Gene Networks and Synthetic Lethal Interactions with Oncogenic Ras. [ Cell, 2019, 36(2):179-193]	PubMed: 28162770
A Pharmacogenomic Landscape in Human Liver Cancers. [ Cancer Cell, 2019, 36(2):179-193]	PubMed: 31378681
Mapping phospho-catalytic dependencies of therapy-resistant tumours reveals actionable vulnerabilities. [ Nat Cell Biol, 2019, 21(6):778-790]	PubMed: 31160710
Discoidin Domain Receptor 2 Signaling Regulates Fibroblast Apoptosis through PDK1/Akt [Jia S Am J Respir Cell Mol Biol, 2018, 59(3):295-305]	PubMed: 29652518
Systematic Functional Characterization of Resistance to PI3K Inhibition in Breast Cancer. [ Cancer Discov, 2016, 6(10):1134-1147]	PubMed: 27604488

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