Contents
1: Basic Hematopoiesis and Leukemia Stem Cells
1.1 Introduction
1.2 Hematopoietic Stem and Progenitor Cells
1.2.1 Hematopoietic Stem and Progenitor Cell Heterogeneity
1.2.2 Lineage Commitment from the Hematopoietic Stem and Progenitor Cell
1.3 Hematopoietic Stem and Progenitor Cell Assays
1.3.1 Phenotypic Characterization
1.3.2 Colony Forming Unit (CFU) and Long-Term Culture-Initiating Cell (LT-CIC) Assays
1.3.3 Xenotransplantation Studies
1.4 Hematopoietic Stem and Progenitor Cell Expansion
1.5 Aging Hematopoiesis, Including Telomeres
1.5.1 Influence of Aging on Hematopoiesis
1.5.2 Telomeres in Hematopoiesis
1.6 Leukemic Stem Cells
References
2: Modern Classification of Acute and Chronic Leukemias: Integrating Biology, Clinicopathologic Features, and Genomics
2.1 Introduction
2.2 Myeloproliferative Neoplasms (MPN)
2.3 Myeloid/Lymphoid Neoplasms with Eosinophilia and Tyrosine Kinase Gene Fusions (MLN-TK)
2.4 Mastocytosis
2.5 Myelodysplastic/Myeloproliferative Neoplasms
2.6 Myelodysplastic Syndromes or Myelodysplastic Neoplasms (MDS)
2.7 Acute Myeloid Leukemia
References
3: Molecular Techniques in the Diagnosis and Monitoring of Acute and Chronic Leukaemias
3.1 Introduction
3.2 Short-Read NGS
3.3 General Principles of NGS
3.4 DNA Sequencing
3.4.1 Principles of NGS Assay Design
3.4.1.1 Panel Selection
3.4.1.2 Gene Selection in Panel Sequencing
3.4.1.3 Considerations of Variant Types During Panel Design
3.4.2 Bioinformatic Analysis for Variant Detection
3.4.2.1 Pre-processing Procedures
3.4.2.2 Variant Calling for SNVs and Short Indels
3.4.2.3 Variant Annotation
3.4.2.4 Variant Calling for Long Indels
3.4.2.5 Detection of CNVs at the Gene Level
3.4.3 Specific Applications of DNA Sequencing Strategies in Leukaemias
3.4.3.1 Molecular Consensus Sequencing for Detection of Subclonal or Rare Variants
3.4.3.2 Evaluation of Immunoglobulin/T-Cell Receptor Genes
3.4.3.3 Genome Sequencing for Cytogenomic Investigations
3.5 RNA Sequencing
3.5.1 Principles of Assay Design
3.5.2 Bioinformatic Considerations for RNA Sequencing
3.6 Molecular Monitoring of Measurable Residual Disease
3.7 Real-Time Quantitative PCR
3.7.1 Principles
3.7.2 MRD Monitoring in CML
3.7.3 RQ-PCR Monitoring in Other Leukaemias
3.8 Digital PCR
3.8.1 Principles
3.8.2 Considerations on Analytical Sensitivity in DPCR
3.9 Gene Expression Profiling
3.9.1 Brief Review of GEP Platforms
3.9.2 Clinical Applications of GEP in Leukaemias
3.10 Newer Techniques
3.10.1 Long-Read Sequencing
3.10.2 Single-Cell Sequencing
3.10.3 Optical Genome Mapping
3.10.4 Circulating Tumour DNA Testing in Leukaemia
3.11 Conclusion
References
4: Flow Cytometric Techniques in the Diagnosis and Monitoring of Acute Leukaemias
4.1 Introduction
4.2 Flow Cytometry in the Diagnosis of Acute Leukaemia
4.3 Minimal Residual Disease Monitoring
4.3.1 Flow Cytometry in ALL MRD
4.3.2 Flow Cytometry in AML MRD
4.3.3 Technical Considerations in Flow Cytometric MRD
4.4 Minimal Residual Disease Studies in Acute Lymphoblastic Leukaemia
4.4.1 MRD Assessment in Childhood ALL
4.4.2 MRD Assessment in Adult ALL
4.4.3 MRD Assessment in Hematopoietic Stem Cell Transplant for ALL
4.4.4 MRD Assessment in Relapse ALL
4.5 Minimal Residual Disease in Acute Myeloid Leukaemia
4.5.1 MRD Assessment in Adult AML
4.5.2 MRD Assessment in Paediatric AML
4.5.3 MRD Assessment in Hematopoietic Stem Cell Transplant for AML
4.5.4 MRD Assessment in Post Remission AML
4.6 Conclusion
References
5: Genomic Landscape and Risk Stratification of Acute Myeloid Leukemia
5.1 Classification of AML Changes and Advances in Biological Techniques
5.2 Genomic Landscape in AML
5.3 Mutations That Lead to Leukemia Cell Survival and Proliferation
5.3.1 FLT3 Mutations
5.3.2 RAS Mutations
5.3.3 KIT Mutations
5.3.4 PTPN 11 Mutations
5.3.5 JAK2 Mutations
5.4 Mutations That Impair Hematopoietic Cell Differentiation
5.4.1 CEBPA Mutations
5.4.2 AML1/RUNX1 Mutations
5.5 Mutations Involving NPM1
5.5.1 NPM1 Mutations
5.6 Mutations in Tumor Suppressor Genes
5.6.1 TP53 Mutations
5.6.2 WT1 Mutations
5.7 Mutations in Genes Related to DNA Methylation
5.7.1 DNMT3A Mutations
5.7.2 IDH Mutations
5.7.3 TET2 Mutations
5.8 Mutations of Genes Related to Histone Modification
5.8.1 ASXL1 Mutations
5.8.2 KMT2A-Rearrangement
5.8.2.1 KMT2A Fusion Protein
5.8.2.2 KMT2A/PTD
5.8.3 EZH2 Mutations
5.9 Mutations Involving Splicing Complex Factor Genes
5.9.1 Splicing Factor Mutations
5.10 Mutations Involving Cohesin Complex Genes
5.10.1 Cohesin Mutations
5.11 Conclusion
References
6: Frontline Management of Acute Myeloid Leukaemia Eligible for Intensive Chemotherapy
6.1 Intensive Chemotherapy in AML: A Historical Perspective
6.2 Intensifying Induction Chemotherapy: Looking beyond ‘DA’
6.2.1 Optimising Cytarabine
6.2.2 Optimising Anthracyclines
6.3 Three Drug Combinations
6.3.1 Etoposide
6.3.2 Purine Analogues
6.4 Gemtuzumab Ozogamicin (GO, GO)
6.5 Modulators of Chemotherapy
6.6 Post-Remission Strategies in AML: Consolidation and Maintenance
6.6.1 Consolidation-Intensity: A Determinant of Outcomes
6.7 Identifying the Standard for Intensive Consolidation
6.7.1 High-Dose Cytarabine: Studies Defining the ‘Optimal’ Dose in Consolidation
6.7.2 Defining the Optimal Drug Combination
6.7.3 Defining the Optimal Number of Consolidation Courses
6.7.4 Consolidation Therapy in Older patients
6.7.5 Maintenance Therapy
6.7.6 Risk-Adapting Intensive Therapy in AML
6.7.7 Intensive Combinations and ‘Actionable’ Genetic Sub-Types of AML
6.7.8 Intensive Drug-Delivery Platforms for Secondary AML
6.8 Measurable Residual Disease (MRD)-Adapted Therapy: Genetic-MRD-Based Strategies
6.9 Measurable Residual Disease (MRD)-Adapted Therapy: Multi-Parametric Flow-Cytometry (MFC)-MRD-Based Strategies
6.10 Too Early to Draft the Obituary for IC?
References
7: Frontline Management of Elderly Acute Myeloid Leukemia Ineligible for Intensive Treatment
7.1 Introduction
7.2 Diagnosis and Risk Classification
7.3 Definition of “Ineligible”
7.4 Frontline Therapeutic Strategies
7.4.1 Venetoclax Plus HMAs
7.4.2 Venetoclax Plus LDAC
7.4.3 Glasdegib Plus LDAC
7.5 Therapeutic Strategies in Specific Molecular Subsets
7.5.1 AML with NPM1 Mutations
7.5.2 AML with FLT3 Mutations
7.5.3 AML with IDH Mutation
7.5.4 AML with TP53 Mutations
7.6 Post-Remission Therapy
7.7 Supportive Care
7.8 Conclusions and Prospects
References
8: Management of Acute Myeloid Leukemia with Myelodysplasia-Related Changes and Therapy-Related Acute Myeloid Leukemia
8.1 Introduction
8.2 Diagnosis of AML-MRC and T-AML
8.3 Treatment of AML-MRC and T-AML
8.3.1 Intensive Chemotherapy
8.3.1.1 CPX-351
8.3.1.2 Combination Therapy
8.3.2 Treatment Options for Chemotherapy-Ineligible Patients
8.3.2.1 Hypomethylating Agent Monotherapy
8.3.2.2 Venetoclax-Based Combinations
8.3.2.3 Single-Agent Targeted Therapies
8.3.2.4 Glasdegib
8.4 Future Directions
8.5 Conclusion
References
9: Management of Relapsed or Refractory AML
9.1 Young or Fit Patients with Relapsed or Refractory AML with Salvage Chemotherapy
9.2 Relapsed or Refractory FLT3-Mutated AML
9.3 Relapsed or Refractory IDH1 or IDH2-Muated AML
9.4 Nonintensive Approach in Unfit Patients
9.5 Relapse After Allogeneic HSCT
References
10: The Role of BCL-2/MCL-1 Targeting in Acute Myeloid Leukemia
10.1 Role of the BCL-2 Family of Proteins in Apoptosis
10.2 Role of BCL-2 in AML
10.2.1 Oblimersen
10.2.2 Obatoclax
10.2.3 ABT-737/ABT-263 (Navitoclax)
10.2.4 Venetoclax
10.2.4.1 Venetoclax Monotherapy in Relapsed/Refractory Patients
10.2.4.2 Venetoclax + Hypomethylating Agents (HMA) in Treatment-Naïve Patients
10.2.4.3 Venetoclax + Low Dose Cytarabine in Treatment-Naïve Patients
10.2.4.4 Venetoclax + HMA/LDAC in Relapsed/Refractory Patients
10.3 Current Clinical Trials of Venetoclax in AML
10.3.1 Venetoclax + Intensive Chemotherapy
10.3.2 Venetoclax + FLT3 Inhibitors
10.3.3 Venetoclax + IDH1/2 Inhibitors
10.3.4 Venetoclax + JAK Inhibitors (Ruxolitinib)
10.3.5 Venetoclax + MCL-1 Inhibitors
10.3.6 Venetoclax + MDM2 Inhibitors
10.4 Role of MCL-1 in AML
10.4.1 MCL-Inhibitors
10.5 Resistance Mechanisms to BCL-2 Inhibitors
10.5.1 Increased Expression of MCL-1
10.5.2 Dysregulation of Mitochondrial Energy Metabolism
10.5.3 Disruption of Mitochondrial Architecture
10.6 Conclusion
References
11: Role of IDH1/IDH2 Inhibitors in AML
11.1 IDH Inhibitors
11.2 IDH1 Inhibitors
11.3 IDH2 Inhibitors
11.4 IDH1/2 Inhibitors
References
12: Next-Generation FLT3 Inhibitors for the Treatment of FLT3-Positive AML
12.1 Introduction
12.2 First-Generation FLT3 Inhibitors
12.3 Second/Next-Generation FLT3 Inhibitors
12.4 Other Novel FLT3 Inhibitors
References
13: Allogeneic Hematopoietic Stem Cell Transplantation for AML
13.1 Introduction
13.2 The Indication of Allogeneic Stem Cell Transplantation in AML
13.2.1 Risk Stratification of AML
13.2.1.1 Characteristics at Diagnosis (Pretreatment Factors)
13.2.1.2 MRD-Based Risk Stratification (Posttreatment Factors)
13.2.2 Evaluation of Risk of Transplant-Related Mortality
13.2.3 The Use of Allo-SCT in AML
13.2.3.1 AML with Poor-Risk in CR1
13.2.3.2 AML with Intermediate Risk in CR1
13.2.3.3 AML with Favorable Risk in CR1
13.2.3.4 Allo-HSCT in AML with CR2 or Beyond
13.2.3.5 Allo-HSCT in Refractory/Relapsed AML
13.2.4 Summary of Indication
13.3 Transplant-Related Strategies
13.3.1 Donor Selection
13.3.2 Conditioning Regimen
13.3.3 Graft Source
13.4 Prevention of Relapse
13.4.1 Pretransplantation Strategies
13.4.2 Posttransplant Strategies
13.4.2.1 Maintenance Therapy (Targeted Drug, HMAs)
13.4.2.2 MRD Guided Preemptive Therapy
13.5 Conclusion and Perspectives
References
14: Maintenance Therapy Following Allogeneic Hematopoietic Stem Cell Transplantation in Acute Myeloid Leukemia
14.1 Introduction
14.2 Targeted Drugs
14.2.1 FLT3 Inhibitors
14.2.2 Monoclonal Antibodies
14.3 Epigenetic Drugs
14.4 Checkpoint Inhibitors
14.4.1 CTLA-4 Inhibitors
14.4.2 PD-1/PD-L1 Inhibitors
14.5 Cellular Therapy
14.5.1 Donor Lymphocyte Infusion (DLI)
14.5.2 NK Cell Infusion
14.5.3 γδ T Cells
14.5.4 CAR T Cells
14.5.5 TCR-T Cells
14.6 Perspectives
References
15: Immunotherapeutic Targeting of AML
15.1 Introduction
15.2 Mechanisms of Immune Escape
15.3 Monoclonal Antibodies
15.3.1 Anti-CD33 Monoclonal Antibodies
15.3.2 Anti-CD123 Monoclonal Antibodies
15.3.3 Other Monoclonal Antibodies Targets
15.4 Adoptive Cellular Therapy
15.4.1 Chimeric Antigen Receptor T Cells (CAR T Cells)
15.4.2 Antigen-Specific Cytotoxic T Cells
15.4.3 Adoptive NK Cell Therapy
15.5 Bispecific Antibodies
15.5.1 CD33 Targeted Bispecific Antibodies
15.5.2 CD123 Targeted Bispecific Antibodies
15.5.3 Other Bispecific Antibody Approaches
15.6 Checkpoint Inhibitors
15.7 Vaccine Therapy for AML
15.8 Conclusion
References
16: In the Pipeline: Emerging Therapy for Acute Myeloid Leukaemia
16.1 Introduction
16.2 Novel Chemotherapeutic Formulations
16.2.1 CPX-351
16.3 Targeting Tyrosine Kinases
16.3.1 FLT3 Inhibitors
16.3.2 c-KIT Inhibitors
16.3.3 AXL Inhibitors
16.3.4 c-MET Inhibitors
16.3.5 SYK Inhibitors
16.3.6 BTK Inhibitors
16.3.7 SFK Inhibitors
16.4 Targeting the Hedgehog Pathway
16.4.1 Smo Inhibitors
16.4.2 GLI Inhibitors
16.5 Targeting Apoptotic Pathways
16.5.1 BCL-2 Family Inhibitors
16.5.2 Bcl-2 Inhibitors
16.5.2.1 Bcl-2/Bcl-xL Dual Inhibitors
16.5.2.2 MCL-1 Inhibitors
16.5.3 TRAIL Inducers
16.6 Targeting the TP53 Pathway
16.6.1 Mutant TP53 Inhibitors
16.6.2 MDM2 Inhibitors
16.7 Targeting the PI3K/AKT/mTOR Pathway
16.8 Targeting Metabolic Pathways
16.8.1 IDH1/2 Inhibitors
16.8.2 Oxidative Phosphorylation Inhibitors
16.8.3 Fatty Acid Oxidation Inhibitors
16.9 Targeting the Proteasome
16.9.1 Proteasome Inhibitors
16.9.2 NAE Inhibitors
16.10 Targeting Nuclear Transport
16.10.1 XPO1 Inhibitors
16.11 Targeting Epigenetic Pathways
16.11.1 Hypomethylating Agents
16.11.2 HDAC Inhibitors
16.11.3 LSD1 Inhibitors
16.11.4 BET Inhibitors
16.11.5 TET Inhibitors
16.11.6 Menin-MLL Inhibitors
16.11.7 DOT1L Inhibitors
16.11.8 EZH Inhibitors
16.11.9 PRMT Inhibitors
16.12 Targeting DNA Damage Response Pathways
16.12.1 PARP Inhibitors
16.12.2 ATR Inhibitors
16.12.3 ATM Inhibitor
16.12.4 CHK Inhibitors
16.12.5 WEE1 Inhibitors
16.13 Targeting the Cell Cycle
16.13.1 CDK Inhibitors
16.13.2 Aurora Kinase Inhibitors
16.13.3 PLK Inhibitors
16.13.4 CDC25 Inhibitors
16.13.5 RSK Inhibitor
16.14 Targeting the Bone Marrow Microenvironment
16.14.1 SDF1/CXCR4 Inhibitors
16.14.2 E-Selectin Inhibitors
16.15 Immunotherapy
16.15.1 Antibody-Based Immunotherapies
16.15.1.1 Antibody-Drug Conjugates
Anti-CD33 ADJs
Anti-CD123 ADJs
16.15.1.2 Radioimmunotherapy
16.15.2 T-Cell-Based Immunotherapies
16.15.2.1 Immune-Related Adverse Events
16.15.2.2 Immune Checkpoint Inhibitors
PD-1/PD-L1 Inhibitors
CTLA-4 Inhibitors
TIM-3 Inhibitors
CD47 Inhibitors
16.15.2.3 Targeting Co-Stimulatory Pathways
OX40 Agonists
16.15.2.4 Multivalent Antibody Therapies
Non-IgG like Multivalent Antibodies
BiTE
Dart
IgG-Like Multivalent Antibodies
16.15.2.5 Chimeric Antigen Receptor T Cells Therapy
16.15.3 NK Cell-Based Immunotherapies
16.15.3.1 Unconjugated Antibodies
16.15.3.2 CAR-NK Cells Therapy
16.15.4 Vaccination
16.16 Conclusion
References
17: Frontline Management of Acute Promyelocytic Leukemia
17.1 Introduction
17.2 Early Deaths in Newly Diagnosed APL: The Major Predictor of Outcome in APL
17.3 Principles of Initial Management and Supportive Care for APL
17.4 Arsenic Trioxide (Intravenous or Oral) Plus All-Trans Retinoic Acid: The Preferred Frontline Induction Regimen for All Patients with Newly Diagnosed APL
References
18: Management of Relapsed Acute Promyelocytic Leukemia and the Role of Hematopoietic Stem Cell Transplantation
18.1 Introduction
18.2 HSCT for APL in the Pre-ATO and Post-ATO Era
18.3 Oral Arsenic Trioxide-based Consolidation and Remission of CR2 Instead of HSCT
References
19: Genomic Landscape of Acute Lymphoblastic Leukemia (ALL): Insights to Leukemogenesis, Prognostications, and Treatment
19.1 Introduction
19.2 World Health Organization (WHO) Classification of ALL
19.2.1 Aneuploidy
19.2.2 Intrachromosomal Amplification of Chromosome 21 (iAMP21)
19.2.3 Gene Translocation
19.3 Ph-Like ALL
19.3.1 Role of Lymphoid Transcription Factor IKAROS in Ph-Like ALL
19.3.2 CRLF2 Rearrangement
19.3.3 ABL Gene Rearrangement
19.3.4 Rearrangement of JAK2 and EPOR
19.3.5 Other Kinase Fusion
19.3.6 Diagnostic Approach of Ph-Like ALL
19.4 Other New Subtypes of B-ALL
19.4.1 ETV6-RUNX1-Like ALL
19.4.2 DUX4-Rearranged ALL
19.4.3 Alterations in Transcription Factors
19.4.4 TCF-HLF Fusion
19.4.5 B-Other ALL
19.4.5.1 IGH Rearrangement
19.4.5.2 NUTM1 Rearrangement
19.4.5.3 PAX5-Driven Subtypes
19.5 Genomic Landscape of T Lymphoblastic Leukemia (T-ALL)
19.5.1 Oncogenic NOTCH1 Signaling Pathway
19.5.2 Cell Cycle Regulator Mutations
19.5.3 Aberrations in Transcription Factor Genes
19.5.3.1 bHLH and LMO Transcription Factors
19.5.3.2 HOX Transcription Factor
19.5.3.3 Other Transcription Factors Aberrations
19.5.4 Aberrations in Epigenetic Regulators
19.5.4.1 PHF6
19.5.4.2 Other Epigenetic Regulators
19.5.5 Aberrations in Oncogenic Signaling Pathway
19.5.6 Mutations of Genes of Ribosomal Proteins
19.5.7 Genomic Landscape of ETP-ALL
19.5.8 Genetic Aberrations in Transcription Factors in ETP-ALL
19.5.9 Molecular Mechanism of Gene Arrangement in Leukemogenesis of ETP-ALL
19.5.10 Activating Mutations in IL7R in ETP-ALL
19.5.11 Mutations in Epigenetic Regulators and Leukemogenesis of ETP-ALL
19.5.12 Challenges and Future Perspectives
References
20: Management of Adolescent and Young Adults with Acute Lymphoblastic Leukaemia
20.1 Introduction
20.2 Genetic Subtypes of ALL in AYA
20.3 Immunophenotyping of ALL in AYA
20.4 Risk Stratification in ALL
20.5 Reports of Traditional Adult ALL Protocols and Paediatric-Inspired ALL Protocols
20.6 Ph-Positive ALL
20.7 Relapsed ALL in AYA
20.8 New Treatment
20.9 Management Issues in AYA Patients Receiving Paediatric-Inspired Protocols
References
21: Management of Older Patients with Acute Lymphoblastic Leukemia
21.1 Introduction
21.2 Philadelphia Chromosome (Ph) Negative ALL
21.3 Ph-positive ALL
21.4 Allogeneic Transplantation
21.5 Targeted Therapies
21.6 Closing Remarks
References
22: Management of Philadelphia Chromosome-positive Acute Lymphoblastic Leukaemia
22.1 Introduction
22.1.1 Definition, Background, and Incidence
22.1.2 Molecular Biology
22.1.3 Chronic Myeloid Leukaemia with Lymphoid Blast Crisis
22.2 Diagnosis, Monitoring, and Minimal Residual Disease
22.2.1 Diagnosis
22.2.2 Monitoring Response and Minimal Residual Disease
22.3 Therapy for Newly Diagnosed Disease
22.3.1 Tyrosine Kinase Inhibitor Overview
22.3.1.1 Which Tyrosine Kinase Inhibitor Is Preferred in Frontline Treatment?
22.3.1.2 Tyrosine Kinase Inhibitor Resistance, BCR-ABL1 Mutations, and Mutation Analysis
22.3.1.3 Central Nervous System Penetration of Tyrosine Kinase Inhibitors
22.3.2 Chemotherapy + Tyrosine Kinase Inhibitor Regimens
22.3.2.1 Paediatrics
22.3.2.2 Adults
22.3.2.3 Older Adults
22.3.3 Stem Cell Transplantation
22.3.3.1 Who Needs Stem Cell Transplantation?
22.3.3.2 Optimisation of Disease Prior to SCT
22.3.3.3 Role of TKI Post-SCT?
22.4 Therapy for Relapsed/Refractory Disease
22.4.1 Ponatinib
22.4.2 Asciminib
22.4.3 Blinatumomab
22.4.4 Inotuzumab Ozogamicin
22.5 Future Directions and the Unknown
References
23: Management of Philadelphia Chromosome-Like Acute Lymphoblastic Leukemia (Ph-Like ALL)
23.1 Definition of Ph-Like ALL
23.2 Biology and Genomic Landscape of Ph-Like ALL
23.2.1 JAK/STAT Pathway Gene Alterations
23.2.2 ABL Class Alterations
23.2.3 Ras Pathway Mutations
23.2.4 Rare Kinase Fusions
23.3 Epidemiology and Clinical Picture of Ph-like ALL
23.4 Diagnostic Modalities and Clinical Workflow Algorithms for Ph-Like ALL
23.5 Precision Medicine Trials in Ph-Like ALL
23.5.1 Targeted Therapies
23.5.2 Hematopoietic Stem Cell Transplantation
23.5.3 Antibody-Based and Cellular Immunotherapy
23.6 Conclusions and Future Perspectives
References
24: Allogeneic Hematopoietic Stem Cell Transplantation for Acute Lymphoblastic Leukemia
24.1 Introduction
24.2 Indication of Allo-HSCT for ALL
24.2.1 High-Risk ALL in First Complete Remission
24.2.2 Standard-Risk Ph-Negative ALL in First Complete Remission
24.2.3 Minimal Residual Diseases for Transplant Decision
24.2.4 Pediatric ALL in First Complete Remission
24.2.5 ALL Beyond CR1
24.3 Donor Selection
24.3.1 Matched Sibling Donors (MSDs) and Unrelated Donors (URDs) in ALL
24.3.2 Haploidentical Donor in ALL
24.4 Outcomes of ALL Following Allo-HSCT
24.4.1 MRD Before Transplant
24.4.2 Conditioning Regimen
24.4.3 Risk Assessment for Patients Undergoing Allo-HSCT
24.5 Prophylaxis and Prevention of Relapse Post-Transplant
24.5.1 Maintenance with Target Drugs
24.5.2 MRD-Guided Pre-Emptive Therapy
24.5.3 Therapy Post-Relapse
24.6 Impact of New Immunotherapeutic Agents on Allo-HSCT
24.6.1 CAR-T May Broaden the Indications of Allo-HSCT in R/R ALL Patients
24.6.2 CAR-T in Relapse Post-Allo-HSCT
24.6.3 CAR-T Therapy Challenges to Allo-HSCT Indications
24.7 Conclusion and Perspectives
References
25: Immunotherapy for ALL
25.1 Overview
25.2 CAR-T Therapy
25.2.1 Overview of CAR-T Cell Therapy
25.2.2 Current Status of CAR-T Cell Therapy in ALL
25.2.3 Modification of CAR-T Cell Therapy
25.2.4 Application of Allogeneic CAR-T Cell Therapy
25.2.5 Challenges of CAR-T Cell Therapy
25.3 Bispecific T-Cell-Engaging (BiTE) Antibody
25.4 Antibody–Drug Conjugate (ADC)
25.5 Natural Killer (NK) Cells
25.6 Donor Leukocyte Infusion (DLI)
25.7 Summary
References
26: In the Pipeline—Emerging Therapy for ALL
26.1 Introduction
26.2 Targeting the PI3K/Akt/mTOR Pathway
26.2.1 PI3K Inhibitors
26.2.2 Akt Inhibitors
26.2.3 mTOR Inhibitors
26.2.4 Dual Inhibitors
26.3 Targeting the BCR-ABL1 Fusion
26.4 Targeting the JAK/STAT Pathway
26.5 Targeting the NOTCH Signaling Pathway
26.6 Targeting Cell Cycle Regulation
26.6.1 Targeting Cell Cycle Promoters
26.6.2 Targeting the Mitotic Regulators
26.7 Targeting the DNA Damage Response (DDR) Pathway
26.7.1 Chk Inhibitor
26.7.2 WEE Inhibitors
26.7.3 Combination of Chk Inhibitors and WEE Inhibitors
26.8 Targeting the p53-MDM2 Pathway
26.9 Targeting the SYK Pathway
26.10 Targeting the FLT3 Signaling Pathway
26.11 Targeting the Wnt/β-Catenin Signaling Pathway
26.12 Targeting the RAS/RAF/MEK/ERK (MAPK) Pathway
26.13 Targeting the Autophagy Pathway
26.14 Targeting the Ubiquitin–Proteasome System
26.15 Targeting the NEDD8 Conjugation Pathway
26.16 Targeting the Epigenetic Regulation
26.16.1 Histone Methylation
26.16.2 DNA Methylation: Hypomethylating Agents (HMAs)
26.16.3 Histone Acetylation
26.17 Targeting the BET Protein
26.18 Targeting the Mitochondrial Pathway of Apoptosis
26.18.1 Targeting BCL-2 Family Proteins
26.19 Targeting Bone Marrow Microenvironment (BMM)
26.19.1 Targeting the CXCL12/CXCR4 Axis
26.20 Immunotherapy
26.21 Naked Monoclonal Antibodies
26.21.1 Anti-CD20 Monoclonal Antibodies
26.21.2 Anti-CD22 Monoclonal Antibodies
26.21.3 Anti-CD38 Monoclonal Antibodies
26.21.4 Anti-CD52 Monoclonal Antibodies
26.22 Antibody–Drug Conjugates (ADCs)
26.22.1 Anti-CD22 ADCs
26.22.2 Anti-CD19 ADCs
26.22.3 Anti-CD25 ADC
26.23 Bispecific T-Cell Engager (BiTE)
26.24 Chimeric Antigen Receptors (CARs)
26.24.1 CD19 CAR-T Cells
26.24.2 CAR-T Therapy in T-ALL
26.25 Immune Checkpoint Inhibitors
26.26 Conclusion
References
27: Inherited/Genetic Predisposition to MDS and AML
27.1 Introduction
27.2 Germline Predisposition to Myelodysplastic Syndrome (MDS)
27.2.1 Deleterious Germline SAMD9 Variants (OMIM 610456, 617053, and 619041) [12, 14, 16, 17]
27.2.2 Deleterious Germline SAMD9L Variants (OMIM 611170, 159550, and 252270) [11, 14, 16–18]
27.2.3 “Adaptation by Aneuploidy” Seen in Germline SAMD9/SAMD9L Mutation Carriers (OMIM 619041) [12, 14]
27.2.4 Deleterious Germline GATA2 Variants (OMIM 137295, 601626, 614286, 614038, and 614172) [13, 14, 19–21]
27.2.5 MDS in Young Adults
27.3 Germline Predisposition to AML
27.3.1 Deleterious Germline DDX41 Variants (OMIM 608170) [1, 2, 4, 30, 31]
27.3.2 Deleterious Germline RUNX1 Mutations/Familial Platelet Disorder (FPD) (OMIM 151385 and 601399) [35–37]
27.3.3 Deleterious Germline GATA2 Variants (OMIM 137295, 601626, 614286, 614038, and 614172) [19–21, 24, 46, 47]
27.3.4 Deleterious Germline CEBPA Variants (OMIM 116897) [52]
27.4 Key Aspects of Germline Testing
27.4.1 Who Should Be Tested?
27.4.2 When Will Be Testing All Patients with a Myeloid Malignancy and Their Allogeneic Stem Cell Donors?
27.4.3 Use of True Germline DNA
27.4.3.1 Why Is It Critical to Use True Germline DNA?
27.4.3.2 How Do You Obtain True Germline DNA?
27.4.4 Use Testing That Is Comprehensive
27.4.5 Carefully Interpret Molecular Profiling Data from Leukemia Cells in Patients Without Significant Personal/Family Histories
27.5 Conclusions
References
28: Clonal Hematopoiesis and Its Functional Implications in MDS/AML
28.1 Introduction
28.2 Clonal Hematopoiesis and Hematological Malignancies
28.3 Clonal Hematopoiesis and Non-hematological Diseases
28.4 Impact of Clonal Hematopoiesis on Cellular Therapy
References
29: Therapy-Related MDS/AML and the Role of Environmental Factors
29.1 Introduction
29.2 Epidemiology
29.3 Pathogenesis
29.3.1 Cytotoxic Therapy
29.3.2 Inherited Risk Factors
29.3.2.1 Single-Nucleotide Polymorphisms (SNP)
29.3.2.2 Germline Single-Nucleotide Variants (SNV)
29.3.2.3 Clonal Hematopoiesis of Indeterminate Potential (CHIP)
29.3.3 Bone Marrow Niche: Focus on the Mesenchymal Stem Cells
29.4 Genetic and Cytogenetic Profile of t-MN
29.5 Environmental Factors
29.6 Clinical Characteristics and Treatment
29.6.1 Prognosis
29.6.2 Treatment
References
30: Prognostic Indicators in MDS and CMML
30.1 Myelodysplastic Syndrome
30.1.1 Introduction
30.1.2 Classification and Prognostication of MDS (Table 30.1)
30.1.3 Prognostic Scoring Systems in MDS
30.1.4 International Prognostic Scoring System (IPSS)
30.1.5 WHO Classification-Based Prognostic Scoring System (WPSS)
30.1.6 MD Anderson General Risk Model (MDAS)
30.1.7 MD Anderson Low-Risk Prognostic Scoring System (MDA LR-PSS)
30.1.8 Revised International Prognostic Scoring System (IPSS-R)
30.1.9 Prognostic Values of Different Prognostic Scoring System
30.1.10 Limitations of Current Prognostic Scoring System
30.1.11 The Molecular Genetics of MDS
30.1.12 New Scoring System with Molecular Integration
30.2 Chronic Myelomonocytic Leukemia (CMML)
30.2.1 Introduction
30.2.2 Prognostic Scoring Systems in CMML
30.2.3 Incorporation of Gene Mutations into Prognostic Models in CMML
30.2.4 Predictive Ability of Different Prognostic Models in CMML
30.2.5 Impact of Risk Stratification on Treatment Decision
30.3 Conclusion
References
31: Treatment Algorithm of Myelodysplastic Syndromes
31.1 Introduction
31.2 Summary of Current Available Treatment Options
31.2.1 Treatment Options for Patients with Lower-Risk MDS
31.2.1.1 Erythropoiesis-Stimulating and Maturing Agents (ESAs and EMAs)
31.2.1.2 Lenalidomide
31.2.2 Treatment Options for Patients with Higher-Risk MDS
31.2.2.1 Hypomethylating Agents (HMAs)
31.2.3 Treatment Options for Patients with Hypoplastic MDS
31.3 Summary
References
32: Treatment Algorithm of CMML and Other Adult MDS/MPN Subtypes
32.1 Introduction
32.2 Chronic Myelomonocytic Leukemias
32.2.1 Epidemiology
32.2.2 Presentation and Diagnosis
32.2.2.1 Clinical Presentation
32.2.2.2 Biological Presentation
32.2.2.3 Diagnostic Criteria
32.2.3 Prognostic Assessment
32.2.4 Treatment Algorithm
32.2.5 Potentially Disease-Modifying Therapies
32.2.5.1 Allogeneic Stem Cell Transplantation
32.2.5.2 Intensive Chemotherapy
32.2.5.3 Hypomethylating Agents
32.2.5.4 Targeted Therapies
32.2.5.5 Symptomatic Treatments
32.2.5.6 Management of Anemia
32.2.5.7 Management of Thrombocytopenia
32.2.5.8 Management of Neutropenia
32.2.5.9 Management of Auto-inflammatory Manifestations
32.2.5.10 Management of Myeloproliferation
32.2.5.11 Management of Extramedullary Manifestations
32.3 Atypical Chronic Myeloid Leukemia
32.3.1 Epidemiology
32.3.2 Presentation and Diagnosis
32.3.3 Prognosis
32.3.4 Treatment Algorithm
32.3.4.1 Patients Eligible to Allogeneic Hematopoietic Stem Cell Transplantation
32.3.4.2 Patients Not Eligible to Allogeneic Hematopoietic Stem Cell Transplantation
32.4 Myelodysplastic/Myeloproliferative Neoplasm with Ring Sideroblasts and Thrombocytosis
32.4.1 Epidemiology
32.4.2 Presentation and Diagnosis
32.4.3 Prognosis
32.4.4 Treatment Algorithm
32.4.4.1 Management of Anemia
32.4.4.2 Management of Thrombocytosis
32.5 MDS/MPN, Unclassifiable (MDS/MPN-U)
32.5.1 Epidemiology
32.5.2 Presentation and Diagnosis
32.5.3 Prognosis
32.5.4 Treatment Algorithm
32.6 Conclusion
References
33: Novel Strategies to Manage Cytopenia in Low-Risk MDS
33.1 Introduction
33.2 Quality of Life
33.3 Therapy of Thrombocytopenia
33.4 Therapy of Anemia
33.5 Therapy of Neutropenia
33.6 Therapy of Pancytopenic MDS
References
34: Allogeneic Hematopoietic Stem Cell Transplantation for MDS and CMML: When and How?
34.1 Introduction
34.2 Disease-Related Factors in MDS
34.3 Disease-Related Factors in CMML
34.4 Patient Factors in Both MDS and CMML
34.4.1 Age
34.4.2 Comorbidity
34.4.3 Performance Status
34.5 Donor Availability
34.6 Conclusion
References
35: In the Pipeline: Emerging Therapy for MDS and MDS/MPN
35.1 Introduction
35.1.1 Myelodysplastic Syndrome
35.1.2 Myelodysplastic Syndrome/Myeloproliferative Neoplasm
35.2 Pathogenesis
35.2.1 Pathogenesis of MDS
35.2.2 Pathogenesis of MDS/MPN
35.3 Current Treatment and Limitations
35.3.1 Allogenic Haematopoietic Stem Cell Transplantation
35.3.2 Hypomethylating Agents
35.4 Novel Hypomethylating Agents
35.5 Molecularly Targeted Agents
35.5.1 Bcl-2 Targeting in MDS
35.5.2 Targeting Vascular Endothelial Growth Factor in MDS/MPN
35.5.3 Thrombopoietin Mimetics in MDS/MPN
35.6 Targeting Epigenetic Regulators
35.6.1 Isocitrate Dehydrogenase 1/2 Inhibitors
35.6.2 P53 Modulation in MDS
35.7 Multi-Kinase Inhibitors
35.7.1 Targeting the Ras Pathway
35.7.1.1 Ras Inhibitors in MDS
35.7.1.2 Farnesyltransferase Inhibition in MDS/ MPN
35.7.1.3 MEK1/2 Inhibition in MDS/MPN
35.7.2 Targeting JAK/STAT Pathway in MDS/ MPN
35.8 Immunotherapy
35.8.1 Targeting CD47 in MDS
35.8.2 Targeting T-Cell Immunoglobulin and Mucin Domain-Containing Protein 3
35.8.3 Targeting PD-1/PD-L1 and CTLA4
35.8.4 Interleukin 2 Inhibitors in MDS/MPN
35.8.5 Interleukin 3 Inhibition in MDS/MPN
35.9 Conclusion
References
36: Molecular Landscape and Personalized Prognostic Prediction of MPNs
36.1 Introduction
36.2 Overview of Classical Ph-Negative MPNs
36.2.1 Polycythaemia Vera (PV) and Essential Thrombocythaemia (ET)
36.2.2 Myelofibrosis (MF)
36.3 Driver Mutations: JAK2, CALR and MPL
36.3.1 JAK2V617F
36.3.2 JAK2 Exon 12
36.3.3 CALR
36.3.4 MPL
36.3.5 Triple-Negative MPNs
36.4 Other Somatic Mutations
36.4.1 DNA Methylation
36.4.2 Histone Modification
36.4.3 mRNA Splicing
36.4.4 Signal Transduction
36.4.5 Transcription Regulation
36.5 Conclusion
References
37: Treatment Algorithm for Polycythemia Vera
37.1 Background and Presentation
37.2 Work Up and Diagnosis
37.3 Risk Assessment and Treatment
37.4 Symptom Burden in PV
37.5 Thrombosis
37.6 Transformation to AML
37.7 Conclusions
References
38: Treatment Algorithm of Essential Thrombocythemia
38.1 Background
38.2 Diagnosis
38.3 Management of ET
38.3.1 Therapeutic Goals
38.3.1.1 Vascular Sequelae
38.3.1.2 Symptom Burden
38.3.1.3 Disease Progression and Survival
38.4 Therapeutic Strategies
38.4.1 First-Line Cytoreductive Treatments
38.4.2 Therapies for Nonresponders/Int
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