生物活性 | |||
---|---|---|---|
靶点 |
|
||
描述 | Many of the tyrosine kinase enzymes which are early components of the growth signal transduction pathway in mammalian cells are encoded by proto-oncogenes, and their transformation or overexpression has been shown to occur in a large percentage of clinical cancers. The epidermal growth factor receptor (EGFR), one of the tyrosine kinase enzymes, has thus become important target for cancer therapy [3]. PD168393 selectively targets and irreversibly inactivates the EGFR TK (tyrosine kinase) with IC50 value of 0.70 nM. PD168393 completely suppressed EGF-dependent receptor autophosphorylation in A431 cells during continuous exposure to 2 μM this compound for 1 hr [4]. Treatment of 3T3-Her2 cells with PD168393 showed rapid and potent inhibition of Her2-induced tyrosine phosphorylation with half-maximal inhibition at ≈100 nM and substantial inhibition at 10 min after drug addition [5]. In nude mice bearing A431 human epidermoid carcinoma as a xenograft, PD 168393 produced tumor growth inhibition of 115% with 58 mg/kg i.p. dosing [4]. | ||
作用机制 | PD168393 inactivates the EGFR TK through specific, covalent modification of a cysteine residue present in the ATP binding pocket . |
实验方案 | |||
---|---|---|---|
1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.71mL 0.54mL 0.27mL |
13.54mL 2.71mL 1.35mL |
27.08mL 5.42mL 2.71mL |
参考文献 |
---|