|
|
||||||||


,
Departments of
*
Interdisciplinary Oncology and
Biochemistry and Molecular Biology, and
Clinical Investigation Program, H. Lee Moffitt Cancer Center and Research Institute, University of South Florida, Tampa, FL 33612
Evasion of immune surveillance is a key step in malignant
progression. Interactions between transformed hematopoietic cells and
their environment may initiate events that confer resistance to
apoptosis and facilitate immune evasion. In this report, we demonstrate
that
1 integrin-mediated adhesion to fibronectin
inhibits CD95-induced caspase-8 activation and apoptosis in hematologic
tumor cell lines. This adhesion-dependent inhibition of CD95-mediated
apoptosis correlated with enhanced c-Fas-associated death domain-like
IL-1-converting enzyme-like inhibitory protein-long
(c-FLIPL) cytosolic solubility compared with nonadhered
cells. Cytosolic c-FLIPL protein preferentially associated
with cytosolic Fas-associated death domain protein (FADD) and localized
to the death-inducing signal complex after CD95 ligation in adherent
cells. The incorporation of c-FLIPL in the death-inducing
signal complex prevented procaspase-8 processing and activation of the
effector phase of apoptosis. Adhesion to fibronectin increased
c-FLIPL cytosolic solubility and availability for FADD
binding by redistributing c-FLIPL from a preexisting
membrane-associated fraction. Increased cytosolic availability of
c-FLIPL for FADD binding was not related to increased
levels of RNA or protein synthesis. These data show that adhesion of
anchorage-independent cells to fibronectin provides a novel mechanism
of resistance to CD95-mediated programmed cell death by regulating the
cellular localization and availability of
c-FLIPL.
This article has been cited by other articles:
![]() |
K. H. Shain, D. N. Yarde, M. B. Meads, M. Huang, R. Jove, L. A. Hazlehurst, and W. S. Dalton {beta}1 Integrin Adhesion Enhances IL-6-Mediated STAT3 Signaling in Myeloma Cells: Implications for Microenvironment Influence on Tumor Survival and Proliferation Cancer Res., February 1, 2009; 69(3): 1009 - 1015. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. B. Meads, L. A. Hazlehurst, and W. S. Dalton The Bone Marrow Microenvironment as a Tumor Sanctuary and Contributor to Drug Resistance Clin. Cancer Res., May 1, 2008; 14(9): 2519 - 2526. [Abstract] [Full Text] [PDF] |
||||
![]() |
L. E. Perez, N. Parquet, K. Shain, R. Nimmanapalli, M. Alsina, C. Anasetti, and W. Dalton Bone Marrow Stroma Confers Resistance to Apo2 Ligand/TRAIL in Multiple Myeloma in Part by Regulating c-FLIP J. Immunol., February 1, 2008; 180(3): 1545 - 1555. [Abstract] [Full Text] [PDF] |
||||
![]() |
W. Dalton and K. C. Anderson Synopsis of a Roundtable on Validating Novel Therapeutics for Multiple Myeloma. Clin. Cancer Res., November 15, 2006; 12(22): 6603 - 6610. [Abstract] [Full Text] [PDF] |
||||
![]() |
L. A. Hazlehurst, R. F. Argilagos, M. Emmons, D. Boulware, C. A. Beam, D. M. Sullivan, and W. S. Dalton Cell Adhesion to Fibronectin (CAM-DR) Influences Acquired Mitoxantrone Resistance in U937 Cells Cancer Res., February 15, 2006; 66(4): 2338 - 2345. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. Parquet, R. Nimmanapalli, C. Anasetti, M. Alsina, W. Dalton, and L. E. Perez Bortezomib Partially Overcomes TNF-Related Apoptosis Inducing ligand/Apo-2L (TRAIL/Apo-2L) Environment Mediated-Drug Resistance (EM-DR). Blood (ASH Annual Meeting Abstracts), November 16, 2004; 104(11): 2459 - 2459. [Abstract] [Full Text] |
||||
![]() |
T. Hayashi, T. Hideshima, A. N. Nguyen, O. Munoz, K. Podar, M. Hamasaki, K. Ishitsuka, H. Yasui, P. Richardson, S. Chakravarty, et al. Transforming Growth Factor {beta} Receptor I Kinase Inhibitor Down-Regulates Cytokine Secretion and Multiple Myeloma Cell Growth in the Bone Marrow Microenvironment Clin. Cancer Res., November 15, 2004; 10(22): 7540 - 7546. [Abstract] [Full Text] [PDF] |
||||
![]() |
S. Shah and P. W. Sylvester Tocotrienol-Induced Caspase-8 Activation Is Unrelated to Death Receptor Apoptotic Signaling in Neoplastic Mammary Epithelial Cells Experimental Biology and Medicine, September 1, 2004; 229(8): 745 - 755. [Abstract] [Full Text] [PDF] |
||||
![]() |
M. Fornaro, J. Plescia, S. Chheang, G. Tallini, Y.-M. Zhu, M. King, D. C. Altieri, and L. R. Languino Fibronectin Protects Prostate Cancer Cells from Tumor Necrosis Factor-{alpha}-induced Apoptosis via the AKT/Survivin Pathway J. Biol. Chem., December 12, 2003; 278(50): 50402 - 50411. [Abstract] [Full Text] [PDF] |
||||
![]() |
L. A. Hazlehurst, S. A. Enkemann, C. A. Beam, R. F. Argilagos, J. Painter, K. H. Shain, S. Saporta, D. Boulware, L. Moscinski, M. Alsina, et al. Genotypic and Phenotypic Comparisons of de Novo and Acquired Melphalan Resistance in an Isogenic Multiple Myeloma Cell Line Model Cancer Res., November 15, 2003; 63(22): 7900 - 7906. [Abstract] [Full Text] [PDF] |
||||
![]() |
R. A. Screaton, S. Kiessling, O. J. Sansom, C. B. Millar, K. Maddison, A. Bird, A. R. Clarke, and S. M. Frisch Fas-associated death domain protein interacts with methyl-CpG binding domain protein 4: A potential link between genome surveillance and apoptosis PNAS, April 29, 2003; 100(9): 5211 - 5216. [Abstract] [Full Text] [PDF] |
||||
![]() |
N. Mitsiades, C. S. Mitsiades, P. G. Richardson, V. Poulaki, Y.-T. Tai, D. Chauhan, G. Fanourakis, X. Gu, C. Bailey, M. Joseph, et al. The proteasome inhibitor PS-341 potentiates sensitivity of multiple myeloma cells to conventional chemotherapeutic agents: therapeutic applications Blood, March 15, 2003; 101(6): 2377 - 2380. [Abstract] [Full Text] [PDF] |
||||
![]() |
K. C. Anderson and W. S. Dalton Synopsis of a Research Roundtable Presented on Cell Signaling in Myeloma: Regulation of Growth and Apoptosis--Opportunities for New Drug Discovery Mol. Cancer Ther., December 1, 2002; 1(14): 1361 - 1365. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. G. Stupack and D. A. Cheresh Get a ligand, get a life: integrins, signaling and cell survival J. Cell Sci., January 10, 2002; 115(19): 3729 - 3738. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |