This Proposal describes a 5 year training program for the development of a research career in cancer biology. The principal investigator (Dr. Zijlstra) outlines a plan to use an established base of infrastructure and research support in conjunction with guidance from his mentor (Dr. Quigley) and collaborative interactions with established investigators (Dr. Stuhlmann and Dr. Blancafort) to expand his scientific skills and mediate his transition to an independent career in cancer research. Project Summary: While metastasis to vital organs is lethal, it is an inefficient biological process suitable for therapeutic intervention. The first step towards intervention is the identification of suitable molecular targets and mechanisms. One of the primary requirements of tumor cell dissemination is the ability of the cell to mobilize itself, intravasate, and leave the original tumor site. This application proposes to characterize CD151 controlled mechanism of migration-mediated intravasation, and to identify new molecular targets which regulate migration in vivo. We have demonstrated that a function blocking antibody targeted to CD151 disrupts a mechanism of in vivo tumor cell motility shared by divergent tumor cell lineages. The resulting inhibition of in vivo motility prevents intravasation and halts metastasis. These observations suggest that highly aggressive tumors can be immobilized, that we can thereby prevent their ability to intravasate at the site of the primary tumor and, as a consequence, limit their metastatic ability. This application proposes to investigate the mechanism of migration responsible for intravasation with the use of intravital imaging and our quantitative metastasis model in three specific aims:
Specific aim #1 is to identify the biological mechanism and route of tumor cell intravasation.
Specific aim #2 To elucidate the molecular mechanism by which the tetraspanin CD151 regulates intravasation during metastatic dissemination in vivo.
Specific aim #3 is to use Artificial Transcription Factors (ATFs) in conjunction with positive selection in an in vivo metastasis model in order to identify molecular targets that inhibit tumor cell migration and intravasation. Project Relevance: Metastasis is the primary cause of cancer related deaths. In order to metastasize, tumor cells have mobilize themselves and enter the circulation. The proposed work is focused on identifying and understanding the mechanisms by which tumor cells can be immobilized.

National Institute of Health (NIH)
National Cancer Institute (NCI)
Research Scientist Development Award - Research & Training (K01)
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Study Section
Subcommittee G - Education (NCI)
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Lohrey, Nancy
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Vanderbilt University Medical Center
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Palmer, Trenis D; Martinez, 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
Hansen, Amanda G; Arnold, Shanna A; Jiang, Ming et al. (2014) ALCAM/CD166 is a TGF-β-responsive marker and functional regulator of prostate cancer metastasis to bone. Cancer Res 74:1404-15
Kain, Kristin H; Miller, James W I; Jones-Paris, Celestial R et al. (2014) The chick embryo as an expanding experimental model for cancer and cardiovascular research. Dev Dyn 243:216-28
Hansen, Amanda G; Freeman, Tanner J; Arnold, Shanna A et al. (2013) Elevated ALCAM shedding in colorectal cancer correlates with poor patient outcome. Cancer Res 73:2955-64
Ashby, William J; Zijlstra, Andries (2012) Established and novel methods of interrogating two-dimensional cell migration. Integr Biol (Camb) 4:1338-50
Ashby, William J; Wikswo, John P; Zijlstra, Andries (2012) Magnetically attachable stencils and the non-destructive analysis of the contribution made by the underlying matrix to cell migration. Biomaterials 33:8189-203
Matise, Lauren A; Palmer, Trenis D; Ashby, William J et al. (2012) Lack of transforming growth factor-β signaling promotes collective cancer cell invasion through tumor-stromal crosstalk. Breast Cancer Res 14:R98
Pink, Desmond B S; Schulte, Wendy; Parseghian, Missag H et al. (2012) Real-time visualization and quantitation of vascular permeability in vivo: implications for drug delivery. PLoS One 7:e33760
Palmer, Trenis D; Zijlstra, Andries (2011) CD151: Basis Sequence: Mouse. AFCS Nat Mol Pages 2011:
Ramirez, Norma E; Zhang, Zhonghua; Madamanchi, Aasakiran et al. (2011) The α₂β₁ integrin is a metastasis suppressor in mouse models and human cancer. J Clin Invest 121:226-37

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