Abstract
Cancer metastasis is a complex cascade that involves the activation of cancer cell migration and invasion of the extracellular space. Cancer-associated fibroblasts (CAFs) are known inducers of cancer cell invasion. However, current in vitro invasion assays such as the Boyden chamber assay are cumbersome and low throughput. Therefore, there is an urgent need for new ex vivo, surrogate invasion assays that can faithfully recapitulate the cancer cell invasion process in vitro and are amenable to large-scale screening of small-molecule libraries in a high-throughput fashion. Here, we describe a well-established high-throughput three-dimensional (3D) spheroid invasion assay as a powerful tool to identify novel molecular targets that can potentially mediate CAF-dependent cancer cell invasion.
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Acknowledgements
Thanks to Dr. Christina Karamboulas, Dr. Ngoc Bui and Jalna Meens for their help and training in the Ailles laboratory. Thanks to Dr. Claudia Tredup and Dr. Bennedict Tillman-Berger from SGC-Frankfurt and Dr. Suzanne Ackloo and Albina Bolotokova from SGC-Toronto laboratories for chemical probe management, sourcing, and distribution. Tissues used to generate the CAF lines were collected from HNSCC patients who underwent surgical resection of their tumors at the University Health Network (UHN) and provided written consent under UHN Research Ethics Board approval (REB no. 12-5639). Thanks to Drs. Rodger Tiedemann, Shane Harding and Robert Rottapel for generously allowing us to use their Incucyte imaging system. Thanks to Dr. Carman K M Ip and Dr. Troy Ketela at the Princess Margaret Genomics Centre (PMGC) for helping to make the chemical probe daughter plates using the Echo liquid handler. The authors appreciate the excellent research environment and the research facilities provided by the Princess Margaret Cancer Centre and the SGC. Kunal Karve was supported by a Mitacs Accelerate fellowship. Stephanie Poon was supported by Ontario Student Opportunity Trust Funds endowed by the Princess Margaret Cancer Center, Ontario Institute for Cancer Research, the University of Toronto and the Province of Ontario. This work was partly funded by a research contract awarded to Drs. Ailles and the SGC from Merck KGaA, Darmstadt, Germany, and by an Investigator Award from the Ontario Institute for Cancer Research. The SGC is a charity (register number 1097737) that received funding from AbbVie, Bayer AG, Boehringer Ingelheim, Bristol Myers Squibb, Genentech, Genome Canada through Ontario Genomics Institute [OGI-196], Janssen, Merck KGaA (aka EMD in Canada and USA), Pfizer, Takeda, and the Innovative Medicines Initiative 2 Joint Undertaking (IMI2 JU; EUbOPEN grant 875510) from the European Union and European Federation of Pharmaceutical Industries and Associations (EFPIA).
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Karve, K., Poon, S., Prinos, P., Ailles, L. (2023). 3D Spheroid Invasion Assay for High-Throughput Screening of Small-Molecule Libraries. In: Merk, D., Chaikuad, A. (eds) Chemogenomics. Methods in Molecular Biology, vol 2706. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3397-7_15
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DOI: https://doi.org/10.1007/978-1-0716-3397-7_15
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