Overexpression of ATP-Binding Cassette Subfamily G Member 2 Confers Resistance to Phosphatidylinositol 3-Kinase Inhibitor PF-4989216 in Cancer Cells

作者: Chung-Pu Wu , Megumi Murakami , Sung-Han Hsiao , An-Wei Chou , Yan-Qing Li

DOI: 10.1021/ACS.MOLPHARMACEUT.7B00277

关键词: RPTORKinase activityCancer cellPI3K/AKT/mTOR pathwayBiologyCell biologyProtein kinase BAbcg2ATP-binding cassette transporterCancer

摘要: Deregulated activation of phosphoinositide 3-kinase (PI3K)/Akt/mammalian target rapamycin (mTOR) pathway is frequently found in human cancers, which plays a key role promoting cancer proliferation and resistance to anticancer therapies. Therefore, developing inhibitors targeting components the PI3K/Akt/mTOR signaling has great clinical significance. PF-4989216 novel, orally available small-molecule drug that was developed selectively inhibit subsequent cell proliferation. exhibited potent selective inhibition against PI3K kinase activity preclinical small-cell lung (SCLC) models, especially effective SCLCs harboring PIK3CA mutation. Unfortunately, addition innate mechanisms, extrusion by efflux pumps may also contribute development acquired cells. The overexpression ATP-binding cassette (ABC)...

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