PI3Kα (IC50 = 4 nM); PI3Kβ (IC50 = 63 nM); PI3Kγ (IC50 = 38 nM); mTOR; Autophagy

BGT226 shows significant growth inhibition or signal blockage profiles compared with LY294002 and Rapamycin. BGT226 (10-10000 nM) inhibits FaDu and OECM1 cells growth with IC50s of 23.1±7.4 and 12.5±5.1 nM, respectively[2]. p-mTOR Ser2481 expression levels are decreased in BGT226-treated cell lines (200 nM; 24 hours), along with p-AKT Ser473 and p-mTOR Ser2448 expression levels[2].

On day 21 compared to control, BGT226 (2.5 and 5 mg/kg; oral administration for 21 days in male athymic mice) results in reductions of 34.7% and 76.1% in tumor growth[2].

BGT226 maleate (NVP-BGT226 maleate) is aPI3K(withIC50s of 4 nM, 63 nM and 38 nM forPI3Kα,PI3KβandPI3Kγ) /mTORdual inhibitor which displays potent growth-inhibitory activity against human head and neck cancer cells.

NCI-H929, U266, RPMI-8226 and OPM2 MM cells are seeded in 96-well plates at a concentration of 1.5 × 104cells/well in RPMI medium supplemented with 10% fetal bovine serum with or without NVP-BGT226 that is to be tested. After 36 hours, BrdU-labelling solution is added (final concentration: 10 μM), and cells are cultured for another 12 hours in a humidified atmosphere (37 °C/5% CO2). Then, the plates are centrifuged (10 min, 300 g), and the supernatants are discarded. The plates are dried at 60 °C for 2 hours. After fixation with ethanol/HCl for 30 min at -20 °C, the DNA is partially digested by nuclease treatment for 30 min at 37 °C. The cells are washed three times with medium and incubated with anti-BrdU-POD labelling solution for 30 min at 37 °C. The anti-POD solution is removed and the cells are washed three times with washing buffer. The ABTS substrate solution is added, and absorbance is measured in a microplate reader at 405 nm with a reference wave length of 490 nm.The anti-proliferative and pro-apoptotic effects of NVP-BGT226 are independent of bcr-abl status. The activation of the AKT/mTOR signal cascade is suppressed by NVP-BGT226 in a concentration- and time-dependent manner. Flow cytometric analysis exhibits an accumulation of cells in the G(0)-G(1) phase with concomitant loss in the S-phase. NVP-BGT226 displays potent growth-inhibitory activity against all tested cell lines including SCC4, TU183 and KB cell lines with the IC50 ranging from 7.4 to 30.1 nM. Notably, both Detroit 562 and HONE-1 cells, which express PIK3CA mutation H1047R, are still sensitive to the growth-inhibitory effect of NVP-BGT226 treatment. In addition, the sensitivity to NVP-BGT226 between HONE-1 cells and its cisplatin-resistant variant is almost identical. Results of the terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay and the analysis of caspase 3/7 and PARP indicates that NVP-BGT226 induces cancer cell death through an apoptosis-independent pathway. NVP-BGT226 induces autophagy as indicated by the aggregation and upregulation of the microtubule-associated protein light chain 3B-II, and p62 degradation. Gene silencing of Beclin1 or cotreatment of the autophagosome inhibitor, 3-methyladenine, inhibits the NVP-BGT226-induced autophagy and leads to the retrieval of colony survival.

Male athymic mice (strain BALB/cAnN.Cg-Foxn1nu/CrlNarl) with FaDu cell xenografted mouse model[2]
2.5 and 5 mg/kg
Oral administration; 21 days

[1]. Phase I safety, pharmacokinetic, and pharmacodynamic study of the oral phosphatidylinositol-3-kinase and mTOR inhibitor BGT226 in patients with advanced solid tumors. Ann Oncol. 2012 Sep;23(9):2399-408.

[2]. Novel phosphoinositide 3-kinase/mTOR dual inhibitor, NVP-BGT226, displays potent growth-inhibitory activity against human head and neck cancer cells in vitro and in vivo. Clin Cancer Res. 2011 Nov 15;17(22):7116-26.

BGT226 is the maleate salt of 8-(6-methoxypyridin-3-yl)-3-methyl-1-[4-(piperazin-1-yl)-3-(trifluoromethyl)phenyl]-1,3-dihydro-2H-imidazo[4,5-c]quinolin-2-one. A dual PI3K/mTOR inhibitor. It has a role as an antineoplastic agent, a mTOR inhibitor and an EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor. It contains a BGT226(1+).
BGT226 Maleate is the maleate form of BGT226, a phosphatidylinositol 3-kinase (PI3K) inhibitor with potential antineoplastic activity. Upon administration, BGT226 specifically inhibits PI3K in the PI3K/AKT kinase (or protein kinase B) signaling pathway, which may trigger the translocation of cytosolic Bax to the mitochondrial outer membrane, increasing mitochondrial membrane permeability; apoptotic cell death may ensue. Bax is a member of the proapoptotic Bcl2 family of proteins.

C28H25F3N6O2.C4H4O4

650.60446

650.21

C, 59.07; H, 4.49; F, 8.76; N, 12.92; O, 14.75

1245537-68-1

BGT226;915020-55-2

57336745

White to yellow solid powder

4.482

3

13

6

47

992

0

COC1=CC=C(C=N1)C2=CC=C(C3=C2)N=CC(N4C)=C3N(C4=O)C5=CC=C(C(C(F)(F)F)=C5)N6CCNCC6.OC(/C=C\C(O)=O)=O

YUXMAKUNSXIEKN-BTJKTKAUSA-N

InChI=1S/C28H25F3N6O2.C4H4O4/c1-35-24-16-33-22-6-3-17(18-4-8-25(39-2)34-15-18)13-20(22)26(24)37(27(35)38)19-5-7-23(21(14-19)28(29,30)31)36-11-9-32-10-12-36;5-3(6)1-2-4(7)8/h3-8,13-16,32H,9-12H2,1-2H3;1-2H,(H,5,6)(H,7,8)/b;2-1-

(Z)-but-2-enedioic acid;8-(6-methoxypyridin-3-yl)-3-methyl-1-[4-piperazin-1-yl-3-(trifluoromethyl)phenyl]imidazo[4,5-c]quinolin-2-one

BGT 226; BGT226; BGT-226; NVP-BGT-226; NVP-BGT226; NVP-BGT 226

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Note: Please store this product in a sealed and protected environment, avoid exposure to moisture.

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO: ~30 mg/mL (46.1 mM)
Water: <1 mg/mL
Ethanol: <1 mg/mL

Solubility in Formulation 1: ≥ 2.5 mg/mL (3.84 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

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Solubility in Formulation 2: 2.5 mg/mL (3.84 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (3.84 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly..

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Solubility in Formulation 4: 30% PEG400+0.5% Tween80+5%Propylene glycol: 30mg/mL

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 (Please use freshly prepared in vivo formulations for optimal results.)