Modeling the effect of ascites-induced compression on ovarian cancer multicellular aggregates.

Published on Sep 1, 2018in Disease Models & Mechanisms4.651
· DOI :10.1242/DMM.034199
Yuliya Klymenko8
Estimated H-index: 8
(ND: University of Notre Dame),
Rebecca B. Wates2
Estimated H-index: 2
(KU: University of Kansas)
+ 7 AuthorsM. Sharon Stack17
Estimated H-index: 17
(ND: University of Notre Dame)
ABSTRACT Epithelial ovarian cancer (EOC) is the most lethal gynecological malignancy. EOC dissemination is predominantly via direct extension of cells and multicellular aggregates (MCAs) into the peritoneal cavity, which adhere to and induce retraction of peritoneal mesothelium and proliferate in the submesothelial matrix to generate metastatic lesions. Metastasis is facilitated by the accumulation of malignant ascites (500 ml to >2 l), resulting in physical discomfort and abdominal distension, and leading to poor prognosis. Although intraperitoneal fluid pressure is normally subatmospheric, an average intraperitoneal pressure of 30 cmH 2 O (22.1 mmHg) has been reported in women with EOC. In this study, to enable experimental evaluation of the impact of high intraperitoneal pressure on EOC progression, two new in vitro model systems were developed. Initial experiments evaluated EOC MCAs in pressure vessels connected to an Instron to apply short-term compressive force. A Flexcell Compression Plus system was then used to enable longer-term compression of MCAs in custom-designed hydrogel carriers. Results show changes in the expression of genes related to epithelial-mesenchymal transition as well as altered dispersal of compressed MCAs on collagen gels. These new model systems have utility for future analyses of compression-induced mechanotransduction and the resulting impact on cellular responses related to intraperitoneal metastatic dissemination. This article has an associated First Person interview with the first authors of the paper.
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