| Bioactivity | Poziotinib (HM781-36B) is an orally active, irreversible pan-HER inhibitor, which effectively inhibits EGFRwt, HER-2 and HER-4 with IC50s of 3.2, 5.3 and 23.5 nM, respectively. Poziotinib (HM781-36B) also shows excellent inhibitory activities against mutated EGFRs, including EGFRT790M and EGFRL858R/T790M, with IC50s of 4.2 and 2.2 nM, respectively. Excellent antitumor activity[1][2]. | ||||||||||||
| Target | IC50: 3.2 nM (EGFRwt), 5.3 nM (HER-2), 23.5 nM (HER-4) 4.2 nM (EGFRT790M), 2.2 nM (EGFRL858R/T790M) | ||||||||||||
| Invitro | The IC50 levels of Poziotinib (HM781-36B) for N87 and SNU216 were 0.001 and 0.004 μM, respectively, which was 10-1000 fold lower than the IC50 levels of other HER family TKIs. HM781-36B more potently inhibited the phosphorylation of HER family and downstream proteins, and induced apoptosis and G1 arrest compared to ZD1839 or GW572016[1].Poziotinib (HM781-36B) also shows excellent selectivity with other kinases with greater than 100- to 1,000- fold IC50 values compared with EGFR family members. Poziotinib (HM781-36B) possesses a functional α,β‐unsaturated carbonyl group as Michael acceptor moiety at the C6 position that allows covalent modifications of the EGFR kinase domain active site[2].The addition of HM781-36B induced potent growth inhibition in both DiFi cells with EGFR overexpression and SNU-175 cells (IC50=0.003 and 0.005 μM, respectively). Furthermore, HM781-36B induced G1 arrest of the cell cycle and apoptosis, and reduced the levels of HER family and downstream signaling molecules, pERK and pAKT, as well as nonreceptor/cytoplasmic tyrosine kinase, BMX[3]. MCE has not independently confirmed the accuracy of these methods. They are for reference only. 0 --> Poziotinib 相关抗体: | ||||||||||||
| In Vivo | The growth of tumors in mice treated with HM781-36B alone or in combination with 5-FU was significantly inhibited compared with control mice, and tumor volume in mice receiving coadministraion of HM781-36B and 5-FU was smaller than tumor volume in mice receiving HM781-36B only[1]. MCE has not independently confirmed the accuracy of these methods. They are for reference only. | ||||||||||||
| CAS | 1092364-38-9 | ||||||||||||
| Formula | C23H21Cl2FN4O3 | ||||||||||||
| Molar Mass | 491.34 | ||||||||||||
| Appearance | 固体 | ||||||||||||
| Transport | Room temperature in continental US; may vary elsewhere. | ||||||||||||
| Storage |
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| Reference | [1]. Nam HJ, et al. Antitumor activity of HM781-36B, an irreversible Pan-HER inhibitor, alone or in combination with cytotoxic chemotherapeutic agents in gastric cancer. Cancer Lett. 2011 Mar 28;302(2):155-65. [2]. Cha MY, et al. Antitumor activity of HM781-36B, a highly effective pan-HER inhibitor in CP-358774-resistant NSCLC and other EGFR-dependent cancer models. Int J Cancer. 2012 May 15;130(10):2445-54. [3]. Kang MH, et al. Antitumor Activity of HM781-36B, alone or in Combination with Chemotherapeutic Agents, in Colorectal Cancer Cells. Cancer Res Treat. 2015 Mar 5. |
Poziotinib
CAS: 1092364-38-9 F: C23H21Cl2FN4O3 W: 491.34
Poziotinib (HM781-36B) is an orally active, irreversible pan-HER inhibitor, which effectively inhibits EGFRwt, HER-2 and
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