Metastatic disease remains the primary cause of mortality in cancer patients. Yet the number of available in vitro models to study metastasis is limited by challenges in the recapitulation of the metastatic microenvironment in vitro, and by difficulties in maintaining colonized-tissue specificity in the expansion and maintenance of metastatic cells. Here, we show that decellularized scaffolds that retain tissue-specific extracellular-matrix components and bound signalling molecules enable, when seeded with colorectal cancer cells, the spontaneous formation of three-dimensional cell colonies that histologically, molecularly and phenotypically resemble in vivo metastases. Lung and liver metastases obtained by culturing colorectal cancer cells on, respectively, lung and liver decellularized scaffolds retained their tissue-specific tropism when injected in mice. We also found that the engineered metastases contained signet ring cells, which has not previously been observed ex vivo. A culture system with tissue-specific decellularized scaffolds represents a simple and powerful approach for the study of organ-specific cancer metastases.
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The authors thank Microscopy Service Laboratory, Animal Studies Core, Genomics Core Facility, and Animal Histopathology Core Facility at the University of North Carolina at Chapel Hill. This work was supported by the University Cancer Research Fund from the University of North Carolina and by R21 CA182322 from the National Institutes of Health/National Cancer Institute. This work was also supported by a generous gift from Mr and Mrs E. Barkley. L.Z. was supported by two funds from the National Natural Science Foundation of China (no. 81372424 and no. 81071831) and the Foundation Research Project of Jiangsu Province (no. BK20131131).
The authors declare no competing interests.
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Tian, X., Werner, M.E., Roche, K.C. et al. Organ-specific metastases obtained by culturing colorectal cancer cells on tissue-specific decellularized scaffolds. Nat Biomed Eng 2, 443–452 (2018). https://doi.org/10.1038/s41551-018-0231-0
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