CNX-1351

• CAT Number: I001099
• CAS Number: 1276105-89-5
• Molecular Formula: C30H35N7O3S
• Molecular Weight: 573.71
• Purity: ≥95%
• Synonyms: 1-[4-[[2-(1H-indazol-4-yl)-4-morpholin-4-ylthieno[3,2-d]pyrimidin-6-yl]methyl]piperazin-1-yl]-6-methylhept-5-ene-1,4-dione
• InChI: InChI=1S/C30H35N7O3S/c1-20(2)16-21(38)6-7-27(39)36-10-8-35(9-11-36)19-22-17-26-28(41-22)30(37-12-14-40-15-13-37)33-29(32-26)23-4-3-5-25-24(23)18-31-34-25/h3-5,16-18H,6-15,19H2,1-2H3,(H,31,34)
• InChIKey: DLNUPKDFXMWRFP-UHFFFAOYSA-N
• SMILES: CC(=CC(=O)CCC(=O)N1CCN(CC1)CC2=CC3=C(S2)C(=NC(=N3)C4=C5C=NNC5=CC=C4)N6CCOCC6)C

CNX-1351 is a potent and isoform-selective targeted covalent PI3Kα inhibitor with IC50 of 6.8 nM.
CNX-1351 is able to potently (EC50<100 nM) and specifically inhibit signaling in PI3Kα-dependent cancer cell lines, and this leads to a potent antiproliferative effect (GI50<100 nM). CNX-1351 inhibits PI3K signaling in SKOV3 cells, with potency (EC50 of 10-100 nM) similar to that of the pan-PI3K inhibitor. To investigate the functional consequence of inhibiting PI3Kα in cells, two cell lines with different PIK3CA activating mutations, SKOV3 ovarian cancer cells (H1047R) and MCF-7 breast cancer cells (E545K), are treated with CNX-1351 and growth is monitored. Both PIK3CA-driven cell lines are growth inhibited by exposure to CNX-1351 for 96 h (GI50 of 78 and 55 nM, respectively)[1].
CNX-1351 inhibits p-AktSer473 in mouse spleens and bonds to PI3Kα in vivo. CNX-1351 is delivered into the intraperitoneal cavity of nude mice at 100 mg/kg once a day for 5 consecutive days (n=3 mice per group). Spleens are harvested from the mice at the indicated times after the last dose (1-24 h) and interrogated by immunoblot for P-AktSer473 or for PI3Kα occupancy. Inhibition of PI3K signaling is detected as a decrease in P-AktSer473 at 1 and 4 h after last dose[1].

Reference

[1]. Nacht M, et al. Discovery of a potent and isoform-selective targeted covalent inhibitor of the lipid kinase PI3Kα. J Med Chem. 2013 Feb 14;56(3):712-21.
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