Depth of Response to Intensive Chemotherapy Has Significant Prognostic Value among Acute Myeloid Leukemia (AML) Patients Undergoing Allogeneic Hematopoietic Stem-Cell Transplantation with Intermediate or Adverse Risk at Diagnosis Compared to At-Risk Group According to European Leukemia Net 2017 Risk Stratification

Author:

Kim Tong-YoonORCID,Park Silvia,Kwag Daehun,Lee Jong-Hyuk,Lee Joonyeop,Min Gi-JuneORCID,Park Sung-SooORCID,Jeon Young-WooORCID,Shin Seung-Hawn,Yahng Seung-AhORCID,Yoon Jae-Ho,Lee Sung-EunORCID,Cho Byung-Sik,Eom Ki-Seong,Kim Yoo-Jin,Lee SeokORCID,Min Chang-Ki,Cho Seok-Goo,Lee Jong-Wook,Kim Hee-JeORCID

Abstract

We evaluated the prognostic efficiency of the European Leukemia Net (ELN) 2017 criteria on the post-transplant outcomes of 174 patients with intermediate (INT; n = 108, 62%) or adverse (ADV) risk (n = 66, 38%) of acute myeloid leukemia; these patients had received the first allogeneic hematopoietic stem-cell transplantation (HSCT) at remission. After a median follow-up period of 18 months, the 2 year OS, RFS, and CIR after HSCT were estimated to be 58.6% vs. 64.4% (p = 0.299), 50.5% vs. 53.7% (p = 0.533), and 26.9% vs. 36.9% (p = 0.060) in the INT and ADV risk groups, respectively. Compared to the ELN 2017 stratification, pre-HSCT WT1 levels (cutoff: 250 copies/104 ABL) more effectively segregated the post-HSCT outcomes of INT risk patients compared to ADV risk patients regarding their 2 year OS (64.2% vs. 51.5%, p = 0.099), RFS (59.4% vs. 32.4%, p = 0.003), and CIR (18.9% vs. 60.0% p < 0.001). Indeed, high WT1 levels were more prominent in INT risk patients than in ADV risk patients. Notably, FLT3-ITD had the greatest impact on post-HSCT outcomes among all the ELN 2017 criteria components; patients in the FLT3-ITD mutant subgroups exhibited the worst outcomes regardless of their allelic ratios or NPM1 status compared to the pre-HSCT WT1 level of other INT and ADV risk patients.

Funder

the National R & D Program for Cancer Control, Ministry of Health and Welfare, Republic of Korea

Publisher

MDPI AG

Subject

Cancer Research,Oncology

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