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Comparison of Reduced-Intensity Idarubicin and Daunorubicin Plus Cytarabine as Induction Chemotherapy for Elderly Patients with Newly Diagnosed Acute Myeloid Leukemia

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Abstract

Background and Objectives

The therapy in elderly patients with acute myeloid leukemia (AML) is a big challenge because of poor risk factors and inferior tolerance to intensive chemotherapy. This study aims to compare the efficacy between reduced-intensity idarubicin plus cytarabine and daunorubicin plus cytarabine (IA regimen and DA regimen, respectively) in elderly patients with newly diagnosed AML.

Methods

We retrospectively investigated 74 patients with newly diagnosed non-M3 AML aged >60 years, where 33 patients received IA regimen, 30 patients received DA regimen, while 11 patients received supportive treatment. We observed the complete remission (CR) rates, overall survival (OS) and side effects in different arms.

Results

The CR rate in IA arm (70.4 %, 19/27) was significantly higher than that in DA arm (40 %, 10/25) in de novo AML (p = 0.028), and further significantly higher when white blood cell (WBC) count >10 × 109/L (p = 0.042) and ECOG (Eastern Cooperative Oncology Group) score <2 (p = 0.021). The overall survival of the entire population was poor with a median survival of 10 months, 1- and 2-year survival rates were 40.5 % (30/74) and 9.5 % (7/74). The median survival of the patients with chemotherapy was 12 months, which was significantly longer than patients treated supportively (4 months) (p < 0.001). There were no differences of median survival and duration of CR between two arms. Early mortality decreased in the past 5 years in both groups. Meanwhile, low-dose idarubicin was well tolerated in elderly patients.

Conclusions

Reduced-intensity chemotherapy offered an improvement in survival, and the reduced-intensity IA regimen could improve CR rate in elderly patients with de novo AML.

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Authors’ contributions

Zonghong Shao designed the research plan and revised the manuscript. Hui Liu analyzed the data and wrote the article. Rong Fu, Lijuan Li, Guojin Wang, Jia Song, Erbao Ruan, Huaquan Wang, Yuhong Wu, and Xiaoming Wang contributed to collection of cases. Kai Ding collected the information of the patients and revised the manuscript. All authors read and approved the final manuscript.

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Correspondence to Zonghong Shao.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant Nos. 81570106, 81570111, 81400088, 81400085), the anticancer major special project of Tianjin (Grant Nos. 12ZCDZSY18000, 12ZCDZSY17900), the Tianjin Municipal Natural Science Foundation (Grant Nos. 14JCYBJC25400, 15JCYBJC24300), the Science and Technology Foundation of Tianjin Municipal Health Bureau (Grant No. 2011kz115) and Tianjin Health and Family Planning Commision (Grant No. 15KG150).

Conflicts of interest

Hui Liu, Rong Fu, Lijuan Li, Guojin Wang, Jia Song, Erbao Ruan, Huaquan Wang, Yuhong Wu, Xiaoming Wang, Kai Ding, Zonghong Shao report no conflicts of interest.

Ethical approval

This study was in accordance with the 1964 Helsinki declaration and was approved by the Ethical Committee of the Tianjin Medical University.

Informed consent

Informed written consent was obtained from all patients or their parents in accordance with the Declaration of Helsinki.

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Liu, H., Fu, R., Li, L. et al. Comparison of Reduced-Intensity Idarubicin and Daunorubicin Plus Cytarabine as Induction Chemotherapy for Elderly Patients with Newly Diagnosed Acute Myeloid Leukemia. Clin Drug Investig 37, 167–174 (2017). https://doi.org/10.1007/s40261-016-0469-9

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