Bosutinib has minimal activity against F317L mutation. Nilotinib may be preferred over bosutinib in patients with F317L mutation.

CONTRADICTED EVIDENCE:...which shows a model of AMN107 in complex with Abl kinase mutant M351T, and shows that the sensitivity of Bcr-Abl mutants to AMN107 segregates into four categories: high (IC50 ≤ 70 nmol/L: M244V, G250E, Q252H, F3llL, F317L, M351T, V379I, L387M, H396P, H396R), medium (IC50 ≤ 200 nmol/L: Y253F, E255K, F359V), low (IC50 ≤ 450 nmol/L: Y253H, E255V), and insensitive (IC50 > 2 μmol/L: T315I).

In our study, we investigated the activity of bosutinib, dasatinib, imatinib, and nilotinib against a panel of 18 mutated forms of BCR/ABL associated with imatinib resistance in CML and Ph+ acute lymphoblastic leukemia patients. The results are listed in Figure 1 (Table 1 lists all the actual values for the relative concentration that inhibits 50%).