Small-molecule drugs that target the B-cell antigen receptor (BCR) signalosome show clinical efficacy in the treatment of B-cell non-Hodgkin lymphoma. These agents, including the Bruton tyrosine kinase (BTK) inhibitor PCI-32765, display an unexpected response in patients with chronic lymphocytic leukemia (CLL): a rapid and sustained reduction of lymphadenopathy accompanied by transient lymphocytosis, which is reversible upon temporary drug deprivation. We hypothesized that this clinical response reflects impaired integrin-mediated adhesion and/or migration. Here, we show that PCI-32765 strongly inhibits BCR-controlled signaling and integrin alpha(4)beta(1)-mediated adhesion to fibronectin and VCAM-1 of lymphoma cell lines and primary CLL cells. Furthermore, PCI-32765 also inhibits CXCL12-, CXCL13-, and CCL19-induced signaling, adhesion, and migration of primary CLLcells. Our data indicate that inhibition of BTK by PCI-32765 overcomes BCR- and chemokine-controlled integrin-mediated retention and homing of malignant B cells in their growth-and survival-supporting lymph node and bone marrow microenvironment, which results in clinically evident CLL regression. (Blood. 2012;119(11):2590-2594)
机构:
Univ Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USAUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
Burger, Jan A.
;
Ghia, Paolo
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Univ Vita Salute San Raffaele, Dept Oncol, Unit Lymphoid Malignancies, Milan, Italy
Ist Sci San Raffaele, Milan, Italy
Univ Vita Salute San Raffaele, Lab Lymphoid Malignancies, Milan, ItalyUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
Ghia, Paolo
;
Rosenwald, Andreas
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Univ Wurzburg, Inst Pathol, D-8700 Wurzburg, GermanyUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
Rosenwald, Andreas
;
Caligaris-Cappio, Federico
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Univ Vita Salute San Raffaele, Dept Oncol, Unit Lymphoid Malignancies, Milan, Italy
Ist Sci San Raffaele, Milan, Italy
Univ Vita Salute San Raffaele, Lab Lymphoid Malignancies, Milan, ItalyUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
机构:
Univ Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USAUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
Burger, Jan A.
;
Ghia, Paolo
论文数: 0引用数: 0
h-index: 0
机构:
Univ Vita Salute San Raffaele, Dept Oncol, Unit Lymphoid Malignancies, Milan, Italy
Ist Sci San Raffaele, Milan, Italy
Univ Vita Salute San Raffaele, Lab Lymphoid Malignancies, Milan, ItalyUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
Ghia, Paolo
;
Rosenwald, Andreas
论文数: 0引用数: 0
h-index: 0
机构:
Univ Wurzburg, Inst Pathol, D-8700 Wurzburg, GermanyUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA
Rosenwald, Andreas
;
Caligaris-Cappio, Federico
论文数: 0引用数: 0
h-index: 0
机构:
Univ Vita Salute San Raffaele, Dept Oncol, Unit Lymphoid Malignancies, Milan, Italy
Ist Sci San Raffaele, Milan, Italy
Univ Vita Salute San Raffaele, Lab Lymphoid Malignancies, Milan, ItalyUniv Texas MD Anderson Canc Ctr, Dept Leukemia, Unit 428, Houston, TX 77230 USA