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Overview
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Background
VS-5584 (SB2343), a purine analog, is a novel small-molecule inhibitor of both mammalian target of rapamycin (mTOR) kinase and all class I phosphoinostide 3-kinase (PI3K) isoforms that ATP-competitively inhibits the activity of mTOR, PI3Kα, PI3Kβ, PI3Kγ and PI3Kδ with values of 50% inhibition concentration IC50 of 37 nmol/L, 16 nmol/L, 68 nmol/L, 25 nmol/L and 42 nmol/L respectively. VS-5585 robustly modulates the cellular PI3K/mTOR pathway, one of the most commonly activated signaling pathways in human cancer, through inhibition of phosphorylation of substrates downstream of PI3K and mTORC1/2. Moreover, VS-5584 has been found to dose-dependently inhibit PI3K/mTOR signaling in tumor tissue resulting in tumor growth inhibition in human xengograft models.
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- Properties
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Overview