Four-year follow-up of patients with imatinib-resistant or intolerant chronic myeloid leukemia receiving dasatinib: efficacy and safety
Xiaojun Huang , Qian Jiang , Jianda Hu , Jianyong Li , Jie Jin , Fanyi Meng , Zhixiang Shen , Ting Liu , Depei Wu , Jianmin Wang , Jianxiang Wang
Front. Med. ›› 2019, Vol. 13 ›› Issue (3) : 344 -353.
Four-year follow-up of patients with imatinib-resistant or intolerant chronic myeloid leukemia receiving dasatinib: efficacy and safety
Dasatinib is a highly effective second-generation tyrosine kinase inhibitor used to treat chronic myeloid leukemia (CML). In 2007, a pivotal phase-2 study of dasatinib as second-line treatment was initiated in 140 Chinese CML patients. This report from the 4-year follow-up revealed that 73% of 59 patients in chronic phase (CML-CP) and 32% of 25 patients in accelerated phase (CML-AP) remained under treatment. The initial dosage of dasatinib for CML-CP and CML-AP patients were 100 mg once daily and 70 mg twice daily (total= 140 mg/day), respectively. The cumulative major cytogenetic response (MCyR) rate among patients with CML-CP was 66.1% (versus 50.8% at 18 months), and the median time to MCyR was 12.7 weeks. All CML-CP patients who achieved MCyR after a 4-year follow-up also achieved a complete cytogenetic response. The cumulative complete hematological response (CHR) rate among patients with CML-AP was 64% (16/25), with three CML-AP patients achieving CHR between 18 months and 4 years of follow-up; the median time to CHR was 16.4 weeks. The adverse event (AE) profile of dasatinib at 4 years was similar to that at 6 and 18 months. The most frequently reported AEs (any grade) included pleural effusion, headache, and myelosuppression. These long-term follow-up data continue to support dasatinib as a second-line treatment for Chinese patients with CML.
chronic myeloid leukemia (CML) / dasatinib / tyrosine kinase inhibitor / long-term follow-up
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