The World Health Organization (WHO) classification of the myeloid neoplasms.

Apoptosis, the cell's intrinsic death program, is a key regulator of tissue homeostasis. An imbalance between cell death and proliferation may result in tumor formation. Also, killing of cancer cells by cytotoxic therapies such as chemotherapy, γ-irradiation or ligation of death receptors is predominantly mediated by triggering apoptosis in target cells. In addition to the intrinsic mitochondrial pathway, elements of death receptor signaling pathways have been implied to contribute to the efficacy of cancer therapy. Failure to undergo apoptosis in response to anticancer therapy may lead to resistance. Also, deregulated expression of death receptor pathway molecules may contribute to tumorigenesis and tumor escape from endogenous growth control. Understanding the molecular events that regulate apoptosis induced by anticancer therapy and how cancer cells evade apoptosis may provide new opportunities for pathway-based rational therapy and for drug development.

Death receptors in chemotherapy and cancer.

Introduction Venetoclax (VEN), a selective BCL2 inhibitor, has single-agent activity in relapsed and refractory (R/R) acute myeloid leukemia (AML), and efficacy in lower intensity combinations for treatment-naive elderly AML patients. VEN treatment combinations in R/R AML have not been previously reported. Methods All R/R myeloid patients (including AML, myelodysplastic syndrome (MDS), and blastic plasmacytoid dendritic cell neoplasm (BPDCN)) treated with VEN combinations in the salvage setting were reviewed. Results Forty-three patients with median age 68 (range, 25-83) were treated for AML (91%), MDS (5%), or BPDCN (5%). Most (n = 36, 84%) were ≥ salvage-2 treatment status, including prior hypomethylating agent (HMA) in 77%. In combination with VEN, most patients received HMA therapy (n = 31, 72%); eight (19%) received low-dose cytarabine (LDAC). Patients received a median of 2 treatment cycles (range, 1-4). Objective response was observed in 9 (21%) patients, including 2 complete responses (CR), 3 CRi, and 4 morphologic leukemia-free state (MLFS). Median survival was 3.0 months (range, 0.5-8.0), and estimated 6-month survival was 24%. Responses were observed in five (24%) of 21 patients with intermediate-risk cytogenetics, 3 (27%) of 11 IDH1/2-mutant, and 4 (50%) of 8 RUNX1-mutated patients. Two (20%) of 10 TP53-mutated patients responded; both had concurrent RUNX1 mutations. Of the 3 (15%) responding patients with adverse cytogenetics, all had concurrent RUNX1 mutations. Conclusion Low-intensity chemotherapy, including HMAs or LDAC, in combination with VEN is a viable salvage option, even in multiply relapsed/refractory patients with AML, MDS, and BPDCN. Notable responses were identified in patients with diploid/intermediate cytogenetics, RUNX1, and/or IDH1/2 mutations.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/ajh.25000

Clinical experience with the BCL2‐inhibitor venetoclax in combination therapy for relapsed and refractory acute myeloid leukemia and related myeloid malignancies

The prevalence of patients with myelodysplastic syndromes (MDS) is increasing owing to an ageing population and increased awareness of these diseases. MDS represent many different conditions, not just a single disease, that are grouped together by several clinical characteristics. A striking feature of MDS is genetic instability, and a large proportion of cases result in acute myeloid leukaemia (AML). We Review three emerging principles of MDS biology: stem-cell dysfunction and the overlap with AML, genetic instability and the deregulation of apoptosis, in the context of inherited bone marrow-failure syndromes, and treatment-related MDS and AML.

Myelodysplastic syndromes: the complexity of stem-cell diseases

The NLRP3 inflammasome functions as a driver of the myelodysplastic syndrome phenotype

The role of apoptosis, proliferation, and the Bcl-2–related proteins in the myelodysplastic syndromes and acute myeloid leukemia secondary to MDS

MDS myelodysplastic syndromes and acute myeloid leukemia secondary to related proteins in the - The role of apoptosis, proliferation, and the Bcl-2

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The role of apoptosis, proliferation, and the Bcl-2–related proteins in the myelodysplastic syndromes and acute myeloid leukemia secondary to MDS

MDS myelodysplastic syndromes and acute myeloid leukemia secondary to related proteins in the - The role of apoptosis, proliferation, and the Bcl-2