Fifty-five adult patients with Ph+ ALL were enrolled…During dasatinib treatment, 53 of 53 evaluable patients (100%) achieved a CHR (one CHRi): 49 patients (92.5%) achieved a CHR at the first BM determination at day 22, 3 at the second determination at day 43, and one at the third determination at day 57...BCR-ABL transcript levels decreased rapidly during dasatinib induction...The leukemic cell reduction was significant between days 0 and 22, days 22 and 43 (P < .0001), and days 43 and 57 (P = .0143)...Mean BCR-ABL levels appeared to be more rapidly reduced in p190+ patients, suggesting a greater susceptibility of BCR-ABLp190–expressing cells to dasatinib....dasatinib is active in patients who have developed imatinib-resistant BCR-ABL mutations, except for T315I.