Cited by 90Lymphoma Diagnosis and TreatmentChronic Lymphocytic Leukemia ResearchCNS Lymphoma Diagnosis and Treatment

Characterization of ibrutinib-sensitive and -resistant mantle lymphoma cells

Ma, Jiao, Lu, Pin, Guo, Ailin, Cheng, Shuhua, Zong, Hongliang, Martin, Peter, Coleman, Morton, Wang, Y. Lynn·2014·British Journal of Haematology

Abstract

Ibrutinib inhibits Bruton tyrosine kinase (BTK), a key component of early B-cell receptor (BCR) signalling pathways. A multicentre phase 2 trial of ibrutinib in patients with relapsed/refractory mantle cell lymphoma (MCL) demonstrated a remarkable response rate. However, approximately one-third of patients have primary resistance to the drug while other patients appear to lose response and develop secondary resistance. Understanding the molecular mechanisms underlying ibrutinib sensitivity is of paramount importance. In this study, we investigated cell lines and primary MCL cells that display differential sensitivity to ibrutinib. We found that the primary cells display a higher BTK activity than normal B cells and MCL cells show differential sensitivity to BTK inhibition. Genetic knockdown of BTK inhibits the growth, survival and proliferation of ibrutinib-sensitive but not resistant MCL cell lines, suggesting that ibrutinib acts through BTK to produce its anti-tumour activities. Interestingly, inhibition of ERK1/2 and AKT, but not BTK phosphorylation per se, correlates well with cellular response to BTK inhibition in cell lines as well as in primary tumours. Our study suggests that, to prevent primary resistance or to overcome secondary resistance to BTK inhibition, a combinatory strategy that targets multiple components or multiple pathways may represent the most effective approach.

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Registry

Crossref · 10.1111/bjh.12974

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38 of 38 references verified0 citation errors · 0 not checkable

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  • BTK is constitutively active in MCL, as p-BTK (Y223) levels were higher in primary MCL cells than in resting B cells.

    “Importantly, BTK is constitutively active in this disease, as a recent study found that despite similar BTK expression levels, levels of p-BTK (Y223), a surrogate marker of BTK activity, were higher in primary MCL cells than in resting B cells.38”

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Authors
Ma, J., Lu, P., Guo, A., Cheng, S., Zong, H., Martin, P., Coleman, M., & Wang, Y. L.
Affiliations
  • Weill Cornell Medicine (US)
  • University of Chicago (US)
Corresponding author
Wang, Y. Lynn
Venue
British Journal of Haematology
Publisher
Wiley
Published
2014-06-24
Volume
166
Issue
6
Pages
849-861
ISSN
  • 0007-1048 (ISSN-L)
  • 1365-2141
OpenAlex
W1999824748
Cited by
90
References
38
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 6 · 2021: 16 · 2020: 12 · 2019: 8 · 2018: 13 · 2017: 6 · 2016: 12 · 2015: 10
FWCI
6.93
Type
journal article
Language
en
Open access
closed
Locations
  • British Journal of Haematology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Start up funding from my institutions: U. of Chicago and Weill Cornell Medical College
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
  • Health Sciences › Medicine › Genetics › Chronic Lymphocytic Leukemia Research
  • Health Sciences › Medicine › Neurology › CNS Lymphoma Diagnosis and Treatment
Keywords
ibrutinib, mantle cell lymphoma, Bruton's tyrosine kinase, drug resistance, BTK inhibition, B cell receptor signaling, ERK1/2, Akt, combination therapy, relapsed/refractory lymphoma
MeSH terms
Agammaglobulinaemia Tyrosine Kinase, Adenine, Antineoplastic Agents, Cell Cycle, Cell Survival, Humans, Phosphorylation, Piperidines, Protein-Tyrosine Kinases, Pyrazoles, Pyrimidines, Tumor Cells, Cultured, Cell Death, Drug Resistance, Neoplasm, Lymphoma, Mantle-Cell, MAP Kinase Signaling System, Cell Proliferation, Gene Knockdown Techniques

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