A highly potent and selective smallmolecule ALK inhibitor, which blocked the growth of ALCL-derived and ALK-dependent cell lines with IC50 values between 2 and 10 nM.NVP-TAE684 treatment resulted in a rapid and sustained inhibition of phosphorylation of NPM-ALK and its downstream effectors and subsequent induction of apoptosis and cell cycle arrest.In vivo, NVP-TAE684 suppressed lymphomagenesis in two independent models of ALK-positive ALCL and induced regression of established Karpas-299 lymphomas.

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