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描述 | The mammalian target of rapamycin (mTOR) is a large protein kinase that integrates both extracellular and intracellular signals of cellular growth, proliferation, and survival, which lies in two different multi-protein complexes, including mTOR complex 1(mTORC1) and mTORC2. XL388 is an orally bioavailable inhibitor of the mTOR that inhibits cellular phosphorylation of mTOR complex 1 (p-p70S6K, pS6, and p-4E-BP1) and mTOR complex 2 (pAKT (S473)) substrates, with IC50 value of 9.9 nM[4]. XL388(5-200nM)-treated MG-63 cells showed increased percentage of G1 phase and decreased S phase and G2-M phase compared with untreated cells. Oral administration of XL388 (20 mg/kg body weight, every three days, × 7 times) significantly inhibited human osteosarcoma cell line U2OS xenograft growth in severe combined immuno-defcient mice more than 40%[5]. XL388 (10-1000 nM, 24-96 h) dose- and time-dependently induced renal cell carcinoma cell line 786-0 cell death. Consistently, oral administration of XL388 (20 mg/kg, every three days, × 7 times) dramatically inhibited 786-0 tumor growth in nude mice more than 60%[6]. | ||
作用机制 | XL388 inhibits mTOR activity in an ATP-competitive manner. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.20mL 0.44mL 0.22mL |
10.98mL 2.20mL 1.10mL |
21.95mL 4.39mL 2.20mL |
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