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Erschienen in: Cancer Microenvironment 1/2010

01.12.2010 | Original Paper

VE-cadherin Regulates Philadelphia Chromosome Positive Acute Lymphoblastic Leukemia Sensitivity to Apoptosis

verfasst von: Heather O’Leary, Stephen M. Akers, Debra Piktel, Cheryl Walton, James E. Fortney, Karen H. Martin, Michael Craig, James Coad, Laura F. Gibson

Erschienen in: Cancer Microenvironment | Ausgabe 1/2010

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Abstract

The mechanisms by which the bone marrow microenvironment regulates tumor cell survival are diverse. This study describes the novel observation that in addition to Philadelphia chromosome positive (Ph+) acute lymphoblastic leukemia (ALL) cell lines, primary patient cells also express Hypoxia Inducible Factor-2α (HIF-2α) and Vascular Endothelial Cadherin (VE-cadherin), which are regulated by Abl kinase. Tumor expression of the classical endothelial protein, VE-cadherin, has been associated with aggressive phenotype and poor prognosis in other models, but has not been investigated in hematopoietic malignancies. Targeted knockdown of VE-cadherin rendered Ph+ ALL cells more susceptible to chemotherapy, even in the presence of bone marrow stromal cell (BMSC) derived survival cues. Pre-treatment of Ph+ ALL cells with ADH100191, a VE-cadherin antagonist, resulted in increased apoptosis during in vitro chemotherapy exposure. Consistent with a role for VE-cadherin in modulation of leukemia cell viability, lentiviral-mediated expression of VE-cadherin in Ph− ALL cells resulted in increased resistance to treatment-induced apoptosis. These observations suggest a novel role for VE-cadherin in modulation of chemoresistance in Ph+ ALL.
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Metadaten
Titel
VE-cadherin Regulates Philadelphia Chromosome Positive Acute Lymphoblastic Leukemia Sensitivity to Apoptosis
verfasst von
Heather O’Leary
Stephen M. Akers
Debra Piktel
Cheryl Walton
James E. Fortney
Karen H. Martin
Michael Craig
James Coad
Laura F. Gibson
Publikationsdatum
01.12.2010
Verlag
Springer Netherlands
Erschienen in
Cancer Microenvironment / Ausgabe 1/2010
Print ISSN: 1875-2292
Elektronische ISSN: 1875-2284
DOI
https://doi.org/10.1007/s12307-010-0035-6

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