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PTK2 expression and immunochemotherapy outcome in chronic lymphocytic leukemia.

Identifieur interne : 003655 ( Main/Exploration ); précédent : 003654; suivant : 003656

PTK2 expression and immunochemotherapy outcome in chronic lymphocytic leukemia.

Auteurs : Martin Weisser [Allemagne] ; Ru-Fang Yeh [États-Unis] ; Guillemette Duchateau-Nguyen [Suisse] ; Giuseppe Palermo [Suisse] ; Tri Quang Nguyen [Suisse] ; Xiaoyan Shi [États-Unis] ; Susanna Y. Stinson [États-Unis] ; Nancy Yu [États-Unis] ; Annika Dufour [Allemagne] ; Tadeusz Robak [Pologne] ; Galina N. Salogub [Russie] ; Anna Dmoszynska [Pologne] ; Philippe Solal-Celigny [France] ; Krzysztof Warzocha [Pologne] ; Javier Loscertales [Espagne] ; John Catalano [Australie] ; Loree Larratt [Canada] ; Viktor A. Rossiev [Russie] ; Isabelle Bence-Bruckler [Canada] ; Christian H. Geisler [Danemark] ; Marco Montillo [Italie] ; Kirsten Fischer [Allemagne] ; Anna-Maria Fink [Allemagne] ; Michael Hallek [Allemagne] ; Johannes Bloehdorn [Allemagne] ; Raymonde Busch [Allemagne] ; Axel Benner [Allemagne] ; Hartmut Döhner [Allemagne] ; Nancy Valente ; Michael K. Wenger [Suisse] ; Stephan Stilgenbauer [Allemagne] ; David Dornan [États-Unis]

Source :

RBID : pubmed:24916506

Descripteurs français

English descriptors

Abstract

Addition of rituximab (R) to fludarabine and cyclophosphamide (FC) has significantly improved patient outcomes in chronic lymphocytic leukemia (CLL). Whether baseline gene expression can identify patients who will benefit from immunochemotherapy over chemotherapy alone has not been determined. We assessed genome-wide expression of 300 pretreatment specimens from a subset of 552 patients in REACH, a study of FC or R-FC in relapsed CLL. An independent test set was derived from 282 pretreatment specimens from CLL8, a study of FC or R-FC in treatment-naïve patients. Genes specific for benefit from R-FC were determined by assessing treatment-gene interactions in Cox proportional hazards models. REACH patients with higher pretreatment protein tyrosine kinase 2 (PTK2) messenger RNA levels derived greater benefit from R-FC, with significant improvements in progression-free survival, independent of known prognostic factors in a multivariate model. Examination of PTK2 gene expression in CLL8 patients yielded similar results. Furthermore, PTK2 inhibition blunted R-dependent cell death in vitro. This retrospective analysis from 2 independent trials revealed that increased PTK2 expression is associated with improved outcomes for CLL patients treated with R-FC vs FC. PTK2 expression may be a useful biomarker for patient selection in future trials. These trials were registered at www.clinicaltrials.gov as #NCT00090051 (REACH) and #NCT00281918 (CLL8).

DOI: 10.1182/blood-2013-12-538975
PubMed: 24916506


Affiliations:


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Le document en format XML

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<name sortKey="Rossiev, Viktor A" sort="Rossiev, Viktor A" uniqKey="Rossiev V" first="Viktor A" last="Rossiev">Viktor A. Rossiev</name>
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<name sortKey="Bence Bruckler, Isabelle" sort="Bence Bruckler, Isabelle" uniqKey="Bence Bruckler I" first="Isabelle" last="Bence-Bruckler">Isabelle Bence-Bruckler</name>
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<name sortKey="Geisler, Christian H" sort="Geisler, Christian H" uniqKey="Geisler C" first="Christian H" last="Geisler">Christian H. Geisler</name>
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<nlm:affiliation>Department I of Internal Medicine and Centre for Integrated Oncology, University of Cologne, Cologne, Germany;</nlm:affiliation>
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<name sortKey="Hallek, Michael" sort="Hallek, Michael" uniqKey="Hallek M" first="Michael" last="Hallek">Michael Hallek</name>
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<nlm:affiliation>Department I of Internal Medicine and Centre for Integrated Oncology, University of Cologne, Cologne, Germany;</nlm:affiliation>
<country xml:lang="fr">Allemagne</country>
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<nlm:affiliation>Department of Internal Medicine III, University of Ulm, Ulm, Germany;</nlm:affiliation>
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<nlm:affiliation>Institute for Medical Statistics and Epidemiology, Technical University of Munich, Munich, Germany;</nlm:affiliation>
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<name sortKey="Benner, Axel" sort="Benner, Axel" uniqKey="Benner A" first="Axel" last="Benner">Axel Benner</name>
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<nlm:affiliation>Division of Biostatistics, German Cancer Research Center, Heidelberg, Germany;</nlm:affiliation>
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<term>Cyclophosphamide (administration & dosage)</term>
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<term>Focal Adhesion Kinase 1 (genetics)</term>
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<term>Leukemia, Lymphocytic, Chronic, B-Cell (therapy)</term>
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<term>RNA, Neoplasm (metabolism)</term>
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<front>
<div type="abstract" xml:lang="en">Addition of rituximab (R) to fludarabine and cyclophosphamide (FC) has significantly improved patient outcomes in chronic lymphocytic leukemia (CLL). Whether baseline gene expression can identify patients who will benefit from immunochemotherapy over chemotherapy alone has not been determined. We assessed genome-wide expression of 300 pretreatment specimens from a subset of 552 patients in REACH, a study of FC or R-FC in relapsed CLL. An independent test set was derived from 282 pretreatment specimens from CLL8, a study of FC or R-FC in treatment-naïve patients. Genes specific for benefit from R-FC were determined by assessing treatment-gene interactions in Cox proportional hazards models. REACH patients with higher pretreatment protein tyrosine kinase 2 (PTK2) messenger RNA levels derived greater benefit from R-FC, with significant improvements in progression-free survival, independent of known prognostic factors in a multivariate model. Examination of PTK2 gene expression in CLL8 patients yielded similar results. Furthermore, PTK2 inhibition blunted R-dependent cell death in vitro. This retrospective analysis from 2 independent trials revealed that increased PTK2 expression is associated with improved outcomes for CLL patients treated with R-FC vs FC. PTK2 expression may be a useful biomarker for patient selection in future trials. These trials were registered at www.clinicaltrials.gov as #NCT00090051 (REACH) and #NCT00281918 (CLL8).</div>
</front>
</TEI>
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<name sortKey="Rossiev, Viktor A" sort="Rossiev, Viktor A" uniqKey="Rossiev V" first="Viktor A" last="Rossiev">Viktor A. Rossiev</name>
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<name sortKey="Solal Celigny, Philippe" sort="Solal Celigny, Philippe" uniqKey="Solal Celigny P" first="Philippe" last="Solal-Celigny">Philippe Solal-Celigny</name>
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<name sortKey="Loscertales, Javier" sort="Loscertales, Javier" uniqKey="Loscertales J" first="Javier" last="Loscertales">Javier Loscertales</name>
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