Related Experiment Video
Updated: Jul 23, 2025
09:02
Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
Published on: November 26, 2018
21.2K
BCR/Integrin Interaction in CLL: A Physiologic Remnant with Clinical Relevance
Erika Tissino1, Riccardo Bomben1, Valter Gattei1
1Clinical and Experimental Onco-Hematology Unit, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Pordenone, Italy.
Summary
CD49d expression negatively impacts outcomes for chronic lymphocytic leukemia patients on Bruton
Area of Science:
- Oncology
- Immunology
- Hematology
Background:
- The alpha chain of the very late antigen-4 (VLA-4) integrin, CD49d, is a prognostic marker in chronic lymphocytic leukemia (CLL).
- Bruton's tyrosine kinase (BTK) inhibitors like ibrutinib and acalabrutinib are standard CLL treatments.
- CD49d expression is associated with poorer prognosis in CLL patients treated with BTK inhibitors.
Purpose of the Study:
- To investigate the role of CD49d expression in CLL patients undergoing BTK inhibitor therapy.
- To explore mechanisms of VLA-4 activation despite BTK inhibition.
- To assess the utility of CD49d evaluation for prognostic stratification in CLL.
Main Methods:
- Analysis of CD49d expression levels in CLL patients.
- Evaluation of VLA-4 activation pathways.
- Assessment of BTK and phosphoinositide 3-kinase (PI3K) inhibitor effects.
Main Results:
- CD49d expression indicates a negative prognostic impact in CLL patients treated with ibrutinib and acalabrutinib.
- VLA-4 remains activated through the B-cell receptor pathway, even with BTK inhibition.
- Phosphoinositide 3-kinase inhibitors can dampen this VLA-4 activation.
Conclusions:
- CD49d expression is a significant negative prognostic factor for CLL patients on BTK inhibitors.
- Targeting VLA-4 activation pathways, potentially with PI3K inhibitors, may overcome resistance to BTK inhibitors.
- Measuring CD49d expression at the start of BTK inhibitor therapy can refine prognostic assessments for CLL patients.
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