Publications

Publications

Quantitative Analysis of human Cancer Cell Extravasation Using Intravital Imaging

Methods Mol Biol. 2016;1458:27-37

Willetts L, Bond D, Stoletov 1, Lewis JD

Abstract

Metastasis, or the spread of cancer cells from a primary tumor to distant sites, is the leading cause of cancer-associated death. Metastasis is a complex multi-step process comprised of invasion, intravasation, survival in circulation, extravasation, and formation of metastatic colonies. Currently, in vitro assays are limited in their ability to investigate these intricate processes and do not faithfully reflect metastasis as it occurs in vivo. Traditional in vivo models of metastasis are limited by their ability to visualize the seemingly sporadic behavior of where and when cancer cells spread (Reymond et al., Nat Rev Cancer 13:858-870, 2013). The avian embryo model of metastasis is a powerful platform to study many of the critical steps in the metastatic cascade including the migration, extravasation, and invasion of human cancer cells in vivo (Sung et al., Nat Commun 6:7164, 2015; Leong et al., Cell Rep 8, 1558-1570, 2014; Kain et al., Dev Dyn 243:216-28, 2014; Leong et al., Nat Protoc 5:1406-17, 2010; Zijlstra et al., Cancer Cell 13:221-234, 2008; Palmer et al., J Vis Exp 51:2815, 2011). The chicken chorioallantoic membrane (CAM) is a readily accessible and well-vascularized tissue that surrounds the developing embryo. When the chicken embryo is grown in a shell-less, ex ovo environment, the nearly transparent CAM provides an ideal environment for high-resolution fluorescent microcopy approaches. In this model, the embryonic chicken vasculature and labeled cancer cells can be visualized simultaneously to investigate specific steps in the metastatic cascade including extravasation. When combined with the proper image analysis tools, the ex ovo chicken embryo model offers a cost-effective and high-throughput platform for the quantitative analysis of tumor cell metastasis in a physiologically relevant in vivo setting. Here we discuss detailed procedures to quantify cancer cell extravasation in the shell-less chicken embryo model with advanced fluorescence microscopy techniques.

PubMed

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APCaRI is part of the Movember Prostate Cancer Outcomes network

The Prostate Cancer Outcomes Global Initiative to Compare and Reduce Variation is a project led by Movember aiming to improve health outcomes for men throughout their prostate cancer journey by focusing on variation in care and engaging clinicians and researchers across 14 countries worldwide.

The international team will collect data from prostate cancer patients segmented into the categories of data items as outlined by the International Consortium for Health Outcomes Measurement (ICHOM). These include patient factors, baseline tumor factors, pathological information, treatment variables, acute complications of treatment, and survival and disease control).

The Alberta Prostate Cancer dataset is highly aligned with the ICHOM standards. This means that we can effectively compare treatments and outcomes in Alberta with teams around the world to find ways to improve our care at home and abroad!

This is the result of hours of planning and true team work lead by Dr. Trafford Crump, the APCaRI Scientific and Data Quality Committee, and the APCaRI clinical, scientific, research and pathology teams. Thanks to your efforts, we are one step closer to improving patient outcomes.

- John Lewis