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Jia X, Liao N, Yu S, Li H, Liu H, Zhang H, Xu J, Yao Y, He H, Yu G, Liu Q, Zhang Y, Shi P. Impact of measurable residual disease in combination with CD19 on postremission therapy choices for adult t(8;21) acute myeloid leukemia in first complete remission. Cancer Med 2024; 13:e7074. [PMID: 38457215 PMCID: PMC10922018 DOI: 10.1002/cam4.7074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 02/08/2024] [Accepted: 02/20/2024] [Indexed: 03/09/2024] Open
Abstract
BACKGROUND The post-remission therapy (PRT) choices for adult t(8;21) acute myeloid leukemia (AML) in first complete remission (CR1) need to be further explored. AIMS We aimed to investigate the impact of measurable residual disease (MRD) combined with CD19 on PRT choices for adult t(8;21) AML in CR1. METHODS A total of 150 t(8;21) AML patients were enrolled, including 67 underwent chemotherapy (CMT) and 83 allogeneic hematopoietic stem cell transplantation (allo-SCT) as PRT in CR1. Subgroup analyses were performed according to MRD level after three cycles of chemotherapy combined with CD19 expression. RESULTS Multivariate analysis indicated MRDhigh after three courses of treatment (HR, 0.14 [95% CI, 0.03-0.66]; p = 0.013) and CD19 negativity (HR, 0.14 [95% CI, 0.02-0.96]; p = 0.045) were risk factors for relapse, while allo-SCT was protective factor for relapse (HR, 0.34 [95% CI, 0.15-0.75]; p = 0.008). Grouped by MRD after three courses of chemotherapy, allo-SCT had lower CIR (p < 0.001) and better OS (p = 0.003) than CMT for MRDhigh patients, CMT showed a higher CIR (35.99% vs. 15.34%, p = 0.100) but comparable OS (p = 0.588) than allo-SCT for MRDlow patients. Grouped by CD19 expression, allo-SCT demonstrated lower CIR (p < 0.001) and better OS (p = 0.002) than CMT for CD19- patients. CMT had a higher CIR (41.37% vs. 10.48%, p = 0.007) but comparable OS (p = 0.147) than allo-SCT for CD19+ patients. Grouped by MRD combined with CD19, MRDhigh /CD19+ subsets were identified out of CD19+ patients benefiting from allo-SCT with lower CIR (p = 0.002) and superior OS (p = 0.020) than CMT. CMT preserved comparable CIR (p = 0.939) and OS (p = 0.658) with allo-SCT for MRDlow /CD19+ patients. MRDlow /CD19- subsets were also identified from MRDlow patients requiring allo-SCT with lower CIR (p < 0.001) and superior OS (p = 0.008) than CMT. Allo-SCT maintained lower CIR (p < 0.001) and superior OS (p = 0.008) than CMT for MRDhigh /CD19- patients. CONCLUSIONS MRD combined with CD19 might optimize PRT choices for adult t(8;21) AML patients in CR1.
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Affiliation(s)
- Xi Jia
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Naying Liao
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Sijian Yu
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Huan Li
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Hui Liu
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Haiyan Zhang
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Jun Xu
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Yunqian Yao
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Han He
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Guopan Yu
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Qifa Liu
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Yu Zhang
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
| | - Pengcheng Shi
- Department of Hematology, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
- Clinical Medical Research Center of Hematological Diseases of Guangdong ProvinceGuangzhouChina
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Chapilliquen Ramirez RM, Corbacho Pachas MTDJ, Zapata Dongo RJ. Prevalence and Prognosis of Secondary Genetic Aberrations Among Patients With Core Binding Factor Acute Myeloid Leukemia: A Mitelman Database Analysis. World J Oncol 2023; 14:488-498. [PMID: 38022406 PMCID: PMC10681777 DOI: 10.14740/wjon1661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023] Open
Abstract
Background Core binding factor acute myeloid leukemia (CBF-AML) comprises t(8;21) and inv(16) and usually has a favorable prognosis. However, a wide spectrum of secondary genetic aberrations has been shown to be associated with worse outcomes with respect to overall survival (OS) and relapse. We aimed to identify secondary molecular and chromosomal aberrations within each group of CBF-AML, i.e., t(8;21) and inv(16), and to evaluate their prognosis with OS. Methods Using the Mitelman Database of Chromosome Aberrations and Gene Fusions in Cancer, we analyzed 193 cases of CBF-AML reported between 2011 and 2021. We conducted a survival analysis to determine the 5-year OS, and we conducted univariate and multivariate Cox regression to identify independent genetic factors related to OS. Results Among the 193 cases with CBF-AML, structural and numerical chromosome rearrangements were 25.9% and 40.9%, respectively, and secondary genetic mutations were 54.9%. The 5-year OS for the presence of del(7) and trisomy 22 was significantly worse. NRAS mutations had a worse 5-year OS in the t(8;21) group in the univariate analysis but showed no significant difference in the multivariate analysis. Conclusions CBF-AML has heterogeneous cytogenetic characteristics but no difference in the 5-year OS between the inv(16) and t(8;21) groups. Finally, the presence of del(7), trisomy 22 and NRAS mutations showed a potential prognostic impact in CBF-AML patients. Secondary genetic findings may need to be identified to determine its association to a worse prognosis, and in the future develop better targeted therapies in patients with CBF-AML.
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Wang B, Wen L, Wang Z, Chen S, Qiu H. Differential Implications of CSF3R Mutations in t(8;21) and CEBPA Double Mutated Acute Myeloid Leukemia. Clin Lymphoma Myeloma Leuk 2022; 22:393-404. [PMID: 34975010 DOI: 10.1016/j.clml.2021.11.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/13/2021] [Accepted: 11/17/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND Few data are available exploring mutations of the colony-stimulating factor 3 receptor (CSF3R) in acute myeloid leukemia (AML) in an all-round and systematic manner. The purpose of this study was to analyze the CSF3R mutations (CSF3Rmut) in AML with recurrent genetic abnormalities for potential synergistic pathomechanism. PATIENTS AND METHODS We retrospectively screened 1102 adult de novo AML patients with available next-generation sequencing (NGS) information on 132 genes related to hematologic disorders. The χ2, Mann-Whitney U tests were used to analyze their associations with clinicopathologic characteristics, and a propensity score matching (PSM) followed by Kaplan-Meier method was applied to measure their prognostic effects. RESULTS Overall, CSF3Rmut were detected in 40 (3.6%) of 1102 patients with adult de novo AML. CSF3Rmut were predominantly enriched in AML with the CEBPA double mutations (CEBPAdm) (16/122, 13.1%), t(8;21) (12/186, 6.5%) and mutated RUNX1 (3/50, 6.0%), respectively. The CSF3Rmut loci and types differed according to AML subtypes, with frameshift-indels and premature stop confined in the t(8;21) AML [10/12 (83.3%)], and missense recurrently aggregated in the CEBPAdm AML [16/16 (100%)]. Cases with CSF3Rmut had a lower WBC count versus those with CSF3R wild-type (CSF3Rwt) in the t(8;21) AML cohort, with a borderline significance [median 5.45 (range 0.94-20.30) × 109/L) vs. 8.80 (range 0.96-155.00) × 109/L, P = .046]. CSF3Rmut were non-significantly associated with higher WBC counts [median 33.6 (range 6.8-287.6) × 109/L vs. 18.1 (range 1.7-196.0) × 109/L, P = .156] and significantly with lower immunophenotypic CD15 positivity [0/8 (0%) vs. 44/80 (55%), P = .009] as compared to CSF3Rwt in the CEBPAdm AML cohort. After propensity score matching followed by Kaplan-Meier analysis, CSF3Rmut cases had comparable disease-free survival (DFS) and overall survival (OS) to those with CSF3Rwt (P = .607 and P = .842, respectively) in the t(8;21) AML cohort. By contrast, CSF3Rmut showed an inclination towards inferior DFS compared to CSF3Rwt in the CEBPAdm AML cohort [median DFS 19.8 (95%CI 3.1-36.5) months vs. not reached (NR), P = .086]. No significant difference was found for OS between CSF3Rmut and CSF3Rwt cases (P = .943). CONCLUSION We concluded that CSF3Rmut were frequently enriched in patients with t(8;21) and CEBPAdm subtypes among AML, but showed divergent clinicopathologic features, mutation loci and types and differing prognostic aspects.
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Affiliation(s)
- Biao Wang
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China; Department of Hematology, Changzhou First People's Hospital (The Third Affiliated Hospital of Soochow University), Changzhou, China
| | - Lijun Wen
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
| | - Zheng Wang
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China; Suzhou Jsuniwell Medical Laboratory, Suzhou, China
| | - Suning Chen
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China; National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, Suzhou, China
| | - Huiying Qiu
- Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.
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Srinivasan S, Kumar S, Vijayasekharan K, Agrawal AK. Prevalence and Clinical Outcome of FMS-Like Tyrosine Kinase Mutations Among Patients With Core Binding Factor-Acute Myeloid Leukemia: Systematic Review and Meta-Analysis. Clin Lymphoma Myeloma Leuk 2021; 22:e221-e232. [PMID: 34750085 DOI: 10.1016/j.clml.2021.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 09/29/2021] [Accepted: 09/29/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Core binding factor acute myeloid leukemia (CBF-AML) belongs to favorable risk group in AML. However, approximately 50% of patients with CBF-AML remain incurable and their outcomes are also determined by the various co-occurring mutations. Though, FMS-like tyrosine kinase-3(FLT3) mutation in AML is associated with poor survival, the prevalence and prognostic significance of FLT3 mutations among CBF-AML is unknown. PATIENTS AND METHODS We performed a systematic review and meta-analysis to assess the prevalence of FLT3 mutations (ITD and TKD) among patients with CBF-AML. The pooled prevalence of FLT3 mutations was estimated for patients with CBF-AML, t(8;21) and Inv(16). Pooled odds ratio was calculated to compare the prevalence of various FLT3 mutations within the 2 subsets of CBF-AML. A random effects model was adopted for analysis when heterogenicity existed (Pheterogenicity< 0.05 or I2 > 50%). Otherwise, a fixed effects model was used. RESULTS The pooled prevalence of any FLT3 mutations among patients with CBF-AML was available from 18 studies and was 13% (95% CI: 10%-16%; I2 = 79%). Comparison of prevalence of FLT3 mutations between the 2 subgroups of CBF-AML showed that patients with t(8;21) had a higher prevalence of FLT3-ITD [pooled odds ratio(OR): 2.23 (95% CI:1.41-3.53, P < .01)] and lower prevalence of FLT3-TKD [pooled OR: 0.29 (95% CI:0.19-0.44; P < .01)] compared to patients with Inv(16). Additionally, we have discussed the prognostic significance of FLT3 mutations in CBF-AML patients. CONCLUSION The prevalence of FLT3-TKD mutation was commoner among Inv(16) AML while FLT3-ITD mutation was commoner among t(8;21) AML. Uniform reporting of outcomes is essential to understand the prognostic significance of FLT3 mutations among CBF-AML.
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Affiliation(s)
- Shyam Srinivasan
- Department of Pediatric Oncology, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra, India.
| | - Shathish Kumar
- Department of Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | | | - Amit Kumar Agrawal
- Department of Medical Oncology, All India Institute of Medical Sciences, Raipur, India
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Wang B, Yang B, Ling Y, Zhang J, Hua X, Gu W, Yan F. Role of CD19 and specific KIT-D816 on risk stratification refinement in t(8;21) acute myeloid leukemia induced with different cytarabine intensities. Cancer Med 2020; 10:1091-1102. [PMID: 33382538 PMCID: PMC7897948 DOI: 10.1002/cam4.3705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/22/2020] [Accepted: 12/07/2020] [Indexed: 12/23/2022] Open
Abstract
High‐dose cytarabine (Ara‐C) has been reported with increased treatment‐related mortality, whereas few data are available concerning intermediate‐dose Ara‐C for induction of acute myeloid leukemia (AML) with t(8;21) translocation. We retrospectively analyzed factors impacting complete remission (CR), event‐free survival (EFS), cumulative incidence of relapse (CIR), and overall survival (OS) in 197 adults with t(8;21) AML, of whom 107 cases were induced with intermediate‐dose and 90 with standard‐dose Ara‐C (as part of 3 + 7 protocol). After a single induction course, the overall CR rate was 87.6% (170/194), with a significant difference between the standard‐dose (83/105, 79.0%) and intermediate‐dose (87/89, 97.8%) groups (p < 0.001). Rather than general KITmut, the specific KIT‐D816 independently led to a lower probability of achieving CR (HR = 3.29 [1.18–9.24], p = 0.023), worse EFS (HR = 3.53 [1.82–6.84], p < 0.001), and OS (HR = 5.45 [1.77–16.84], p = 0.003) in the standard‐dose group, but not in the intermediate‐dose group. CD19(+) represented the only independent factor predicting lower CIR both in the standard‐dose group (HR = 0.32 [0.10–1.00], p = 0.050) and in the intermediate‐dose group (HR = 0.11 [0.03–0.40], p = 0.001). When combined, KIT(+) plus CD19(−) conferred the most increased relapse risk (3‐year CIR 60%; SE 0.12). Specific KIT‐D816, instead of general KITmut, may be incorporated in prognostication model for t(8;21) AML. Combination of CD19 with KIT provides a more definite risk stratification profile for t(8;21) AML.
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Affiliation(s)
- Biao Wang
- Department of Hematology, Changzhou First People's Hospital, Changzhou, China
| | - Bin Yang
- Department of Hematology, Changzhou First People's Hospital, Changzhou, China
| | - Yun Ling
- Department of Hematology, Changzhou First People's Hospital, Changzhou, China
| | - Jihong Zhang
- Blood Research Laboratory, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xiaoying Hua
- Department of Hematology, Changzhou First People's Hospital, Changzhou, China
| | - Weiying Gu
- Department of Hematology, Changzhou First People's Hospital, Changzhou, China
| | - Feng Yan
- Department of Hematology, Changzhou First People's Hospital, Changzhou, China
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Wu J, Lu AD, Zhang LP, Zuo YX, Jia YP. [Study of clinical outcome and prognosis in pediatric core binding factor-acute myeloid leukemia]. Zhonghua Xue Ye Xue Za Zhi. 2019;40:52-57. [PMID: 30704229 PMCID: PMC7351698 DOI: 10.3760/cma.j.issn.0253-2727.2019.01.010] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Objective: To analyze the clinical outcome and the prognostic factor in pediatric patients with core binding factor-acute myeloid leukemia (CBF-AML). Methods: A total of 121 newly diagnosed pediatric CBF-AML patients enrolled from Aug. 2005 to Sep. 2017 were retrospectively reviewed. Cumulative incidence of relapse (CIR), event-free survival (EFS) and overall survival (OS) rates were estimated by Kaplan-Meier method and prognostic factors were evaluated by Cox regression with SPSS. Results: Of the 121 patients, 120 patients were assessed for bone marrow remission after induction chemotherapy. 100 cases (83.3%) achieved complete remission (CR) after the first course of chemotherapy. 119 cases (99.2%) achieved CR after the second course of chemotherapy. Of the 121 patients, 13 patients (10.7%) had recurrence with the median interval of recurrence as 13.8 months (3.7 to 58.8 months). 17 patients (14.0%) died. The CIR, EFS and OS at 3 years were 12.7%, 77.5% and 82.8%, respectively. The factors including age at diagnosis, sex, initial WBC count, presence of extramedullary leukemia, C-KIT expression, additional chromosomal abnormalities, and CR after the first course of chemotherapy were analyzed by multivariate regression analysis of Cox. Multivariate analysis identified that additional chromosomal abnormalities was the only independent risk factor affecting OS (HR=4.289, 95%CI 1.070-17.183, P=0.040). Conclusions: Pediatric CBF-AML was a unique setting of prognostic subtypes. Chemotherapy produced good responses. Additional chromosomal abnormalities was the only independent risk factor for OS in pediatric CBF-AML.
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Li Y, Ning Q, Shi J, Chen Y, Jiang M, Gao L, Huang W, Jing Y, Huang S, Liu A, Hu Z, Liu D, Wang L, Nervi C, Dai Y, Zhang MQ, Yu L. A novel epigenetic AML1-ETO/THAP10/miR-383 mini-circuitry contributes to t(8;21) leukaemogenesis. EMBO Mol Med 2018; 9:933-949. [PMID: 28539478 PMCID: PMC5577530 DOI: 10.15252/emmm.201607180] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
DNA methylation patterns are frequently deregulated in t(8;21) acute myeloid leukaemia (AML), but little is known of the mechanisms by which specific gene sets become aberrantly methylated. Here, we found that the promoter DNA methylation signature of t(8;21)+ AML blasts differs from that of t(8;21)- AMLs. This study demonstrated that a novel hypermethylated zinc finger-containing protein, THAP10, is a target gene and can be epigenetically suppressed by AML1-ETO at the transcriptional level in t(8;21) AML. Our findings also show that THAP10 is a bona fide target of miR-383 that can be epigenetically activated by the AML1-ETO recruiting co-activator p300. In this study, we demonstrated that epigenetic suppression of THAP10 is the mechanistic link between AML1-ETO fusion proteins and tyrosine kinase cascades. In addition, we showed that THAP10 is a nuclear protein that inhibits myeloid proliferation and promotes differentiation both in vitro and in vivo Altogether, our results revealed an unexpected and important epigenetic mini-circuit of AML1-ETO/THAP10/miR-383 in t(8;21) AML, in which epigenetic suppression of THAP10 predicts a poor clinical outcome and represents a novel therapeutic target.
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Affiliation(s)
- Yonghui Li
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Qiaoyang Ning
- Department of Haematology, Chinese PLA General Hospital, Beijing, China.,Nankai University School of Medicine, Tianjin, China
| | - Jinlong Shi
- Department of Biomedical Engineering, Chinese PLA General Hospital, Beijing, China
| | - Yang Chen
- Key Laboratory of Bioinformatics, Tsinghua University, Beijing, China
| | - Mengmeng Jiang
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Li Gao
- Department of Haematology, China-Japan Friendship Hospital, Beijing, China
| | - Wenrong Huang
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Yu Jing
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Sai Huang
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Anqi Liu
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Zhirui Hu
- Key Laboratory of Bioinformatics, Tsinghua University, Beijing, China
| | - Daihong Liu
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Lili Wang
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
| | - Clara Nervi
- Department of Medico-Surgical Sciences and Biotechnologies, University of Rome "La Sapienza" Polo Pontino, Latina, Italy
| | - Yun Dai
- Cancer Centre, The First Hospital of Jilin University, Changchun, China.,Department of Internal Medicine, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA, USA
| | - Michael Q Zhang
- Key Laboratory of Bioinformatics, Tsinghua University, Beijing, China
| | - Li Yu
- Department of Haematology, Chinese PLA General Hospital, Beijing, China
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