In order for cancer metastasis to occur, a tumor cell must be able to mobilize itself. This mobility allows it to invade adjacent normal tissue, leave the original tumor site, enter local vasculature, and disseminate to distant organs. We have recently published an in vivo analysis of migration which demonstrates that promoting the immobility of tumor cells through the cell surface tetraspanin CD151 prevents intravasation and subsequent metastasis (Zijlstra et al., 2008). Further biochemical analysis identified Activated Leukocyte Cell Adhesion Molecule (ALCAM) as a novel tetraspanin partner of CD151 in tetraspanin enriched microdomains (TERM). Genetic experiment confirmed that ALCAM is required for CD151 to mediate immobility. We have subsequently determined that CD151 and ALCAM form an endogenous regulatory complex that limits migration by promoting integrin-dependent adhesion via Rap1 activation. Our current observations suggest that ALCAM functions as an anchoring mechanism that recruits CD151-containing TERM to cell-cell adhesions. Stabilization of this complex via CD151 or ALCAM promotes immobility while disruption of the complex can promote invasion and metastasis. We propose to determine the molecular mechanism by which CD151/ALCAM-containing TERM can promote immobility and to investigate the contribution of this complex to metastasis of prostate cancer to the bone. This application proposes to specifically investigate the molecular mechanism by which mobility is regulated, its ability to control prostate cancer metastasis, and its relation to human disease progression and patient survival.
In aim #1 we will determine the endogenous mechanism by which CD151/ALCAM promote tumor cell immobility in vitro and in vivo. Orthotropic prostate metastasis models will be used in aim #2 to investigate the ability of the endogenous ALCAM/CD151 regulatory complex to influence prostate cancer metastasis. Furthermore, the correlation between ALCAM/CD151 related expression profiles and disease progression with survival within patient populations will be investigated in aim #3 The findings of the proposed work will not only shed light on the molecular mechanism of CD151 and its newly identified membrane partner ALCAM/CD166. It will also provide a critical evaluation of tumor cell immobilization as a therapeutic target in preventing dissemination and identifying potentially novel clinical targets for the treatment of invasive disease.

Public Health Relevance

Cancer related deaths occur primarily because tumor cells spread from the site of origin to distant vital organs using the circulatory system. In order to reach a distant organ, tumor cells have to mobilize themselves and enter the circulation. The overall goal of proposed work is to develop mechanisms of molecular intervention which immobilizes tumor cells and prevent tumor cell metastasis in cancer patients.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA143081-05
Application #
8589374
Study Section
Tumor Progression and Metastasis Study Section (TPM)
Program Officer
Ault, Grace S
Project Start
2009-12-07
Project End
2014-11-30
Budget Start
2013-12-01
Budget End
2014-11-30
Support Year
5
Fiscal Year
2014
Total Cost
$281,691
Indirect Cost
$101,443
Name
Vanderbilt University Medical Center
Department
Pathology
Type
Schools of Medicine
DUNS #
004413456
City
Nashville
State
TN
Country
United States
Zip Code
37212
Tian, Hongyu; Ketova, Tatiana; Hardy, Duriel et al. (2017) Endoglin Mediates Vascular Maturation by Promoting Vascular Smooth Muscle Cell Migration and Spreading. Arterioscler Thromb Vasc Biol 37:1115-1126
Enyindah-Asonye, Gospel; Li, Yan; Ruth, Jeffrey H et al. (2017) CD318 is a ligand for CD6. Proc Natl Acad Sci U S A 114:E6912-E6921
Arnold Egloff, Shanna A; Du, Liping; Loomans, Holli A et al. (2017) Shed urinary ALCAM is an independent prognostic biomarker of three-year overall survival after cystectomy in patients with bladder cancer. Oncotarget 8:722-741
Loomans, Holli A; Arnold, Shanna A; Quast, Laura L et al. (2016) Esophageal squamous cell carcinoma invasion is inhibited by Activin A in ACVRIB-positive cells. BMC Cancer 16:873
Arnold, Shanna A; Loomans, Holli A; Ketova, Tatiana et al. (2016) Urinary oncofetal ED-A fibronectin correlates with poor prognosis in patients with bladder cancer. Clin Exp Metastasis 33:29-44
Sung, Bong Hwan; Ketova, Tatiana; Hoshino, Daisuke et al. (2015) Directional cell movement through tissues is controlled by exosome secretion. Nat Commun 6:7164
Preston Campbell, J; Mulcrone, P; Masood, S K et al. (2015) TRIzol and Alu qPCR-based quantification of metastatic seeding within the skeleton. Sci Rep 5:12635
Palmer, Trenis D; Martínez, Carlos H; Vasquez, Catalina et al. (2014) Integrin-free tetraspanin CD151 can inhibit tumor cell motility upon clustering and is a clinical indicator of prostate cancer progression. Cancer Res 74:173-87
Madamanchi, Aasakiran; Zijlstra, Andries; Zutter, Mary M (2014) Flipping the switch: integrin switching provides metastatic competence. Sci Signal 7:pe9
Stoletov, Konstantin; Bond, David; Hebron, Katie et al. (2014) Metastasis as a therapeutic target in prostate cancer: a conceptual framework. Am J Clin Exp Urol 2:45-56

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