Deregulation and epigenetic modification of BCL2-family genes cause resistance to venetoclax in hematologic malignancies.
Humans
Leukemia, Lymphocytic, Chronic, B-Cell
/ drug therapy
Myeloid Cell Leukemia Sequence 1 Protein
/ genetics
Proto-Oncogene Proteins c-bcl-2
/ genetics
bcl-2-Associated X Protein
/ metabolism
Drug Resistance, Neoplasm
/ genetics
Apoptosis Regulatory Proteins
/ genetics
Bridged Bicyclo Compounds, Heterocyclic
/ pharmacology
Lymphoma, Large B-Cell, Diffuse
/ pathology
Hematologic Neoplasms
/ drug therapy
Epigenesis, Genetic
Journal
Blood
ISSN: 1528-0020
Titre abrégé: Blood
Pays: United States
ID NLM: 7603509
Informations de publication
Date de publication:
17 11 2022
17 11 2022
Historique:
accepted:
01
06
2022
received:
04
10
2021
pubmed:
16
6
2022
medline:
22
11
2022
entrez:
15
6
2022
Statut:
ppublish
Résumé
The BCL2 inhibitor venetoclax has been approved to treat different hematological malignancies. Because there is no common genetic alteration causing resistance to venetoclax in chronic lymphocytic leukemia (CLL) and B-cell lymphoma, we asked if epigenetic events might be involved in venetoclax resistance. Therefore, we employed whole-exome sequencing, methylated DNA immunoprecipitation sequencing, and genome-wide clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 screening to investigate venetoclax resistance in aggressive lymphoma and high-risk CLL patients. We identified a regulatory CpG island within the PUMA promoter that is methylated upon venetoclax treatment, mediating PUMA downregulation on transcript and protein level. PUMA expression and sensitivity toward venetoclax can be restored by inhibition of methyltransferases. We can demonstrate that loss of PUMA results in metabolic reprogramming with higher oxidative phosphorylation and adenosine triphosphate production, resembling the metabolic phenotype that is seen upon venetoclax resistance. Although PUMA loss is specific for acquired venetoclax resistance but not for acquired MCL1 resistance and is not seen in CLL patients after chemotherapy-resistance, BAX is essential for sensitivity toward both venetoclax and MCL1 inhibition. As we found loss of BAX in Richter's syndrome patients after venetoclax failure, we defined BAX-mediated apoptosis to be critical for drug resistance but not for disease progression of CLL into aggressive diffuse large B-cell lymphoma in vivo. A compound screen revealed TRAIL-mediated apoptosis as a target to overcome BAX deficiency. Furthermore, antibody or CAR T cells eliminated venetoclax resistant lymphoma cells, paving a clinically applicable way to overcome venetoclax resistance.
Identifiants
pubmed: 35704690
pii: S0006-4971(22)00773-X
doi: 10.1182/blood.2021014304
pmc: PMC10653032
doi:
Substances chimiques
venetoclax
N54AIC43PW
Myeloid Cell Leukemia Sequence 1 Protein
0
Proto-Oncogene Proteins c-bcl-2
0
bcl-2-Associated X Protein
0
Apoptosis Regulatory Proteins
0
Bridged Bicyclo Compounds, Heterocyclic
0
BCL2 protein, human
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2113-2126Commentaires et corrections
Type : CommentIn
Informations de copyright
© 2022 by The American Society of Hematology. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.
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