The exact role of malignant ascites in the development of intraperitoneal metastases remains unclear, and the mechanisms by which extracellular vesicles (EVs) promote tumor progression in the pre-metastatic niche have not been fully discovered. In this study, we characterized ascites from high-grade epithelial ovarian cancer patients. Small-EVs (30–150 nm) were isolated from two sources—the bulk ascites and the ascitic fluid-derived tumor cell cultures—and assessed with a combination of imaging, proteomic profiling, and protein expression analyses. In addition, Gene Ontology and pathway analysis were performed using different databases and bioinformatic tools. The results proved that the small-EVs derived from the two sources exhibited significantly different stiffness and size distributions. The bulk ascitic fluid-derived small-EVs were predominantly involved in the complement and coagulation cascade. Small-EVs derived from ascites cell cultures contained a robust proteomic profile of extracellular matrix remodeling regulators, and we observed an increase in transforming growth factor-β-I (TGFβI), plasminogen activator inhibitor 1 (PAI-1), and fibronectin expression after neoadjuvant chemotherapy. When measured in the two sources, we demonstrated that fibronectin exhibited opposite expression patterns in small-EVs in response to chemotherapy. These findings highlight the importance of an ascites cell isolation workflow in investigating the treatment-induced cancer adaption processes.

Small extracellular vesicles from malignant ascites of patients with advanced ovarian cancer provide insights into the dynamics of the extracellular matrix / Bortot B.; Apollonio M.; Rampazzo E.; Valle F.; Brucale M.; Ridolfi A.; Ura B.; Addobbati R.; Di Lorenzo G.; Romano F.; Buonomo F.; Ripepi C.; Ricci G.; Biffi S.. - In: MOLECULAR ONCOLOGY. - ISSN 1574-7891. - ELETTRONICO. - 15:12(2021), pp. 3596-3614. [10.1002/1878-0261.13110]

Small extracellular vesicles from malignant ascites of patients with advanced ovarian cancer provide insights into the dynamics of the extracellular matrix

Rampazzo E.;
2021

Abstract

The exact role of malignant ascites in the development of intraperitoneal metastases remains unclear, and the mechanisms by which extracellular vesicles (EVs) promote tumor progression in the pre-metastatic niche have not been fully discovered. In this study, we characterized ascites from high-grade epithelial ovarian cancer patients. Small-EVs (30–150 nm) were isolated from two sources—the bulk ascites and the ascitic fluid-derived tumor cell cultures—and assessed with a combination of imaging, proteomic profiling, and protein expression analyses. In addition, Gene Ontology and pathway analysis were performed using different databases and bioinformatic tools. The results proved that the small-EVs derived from the two sources exhibited significantly different stiffness and size distributions. The bulk ascitic fluid-derived small-EVs were predominantly involved in the complement and coagulation cascade. Small-EVs derived from ascites cell cultures contained a robust proteomic profile of extracellular matrix remodeling regulators, and we observed an increase in transforming growth factor-β-I (TGFβI), plasminogen activator inhibitor 1 (PAI-1), and fibronectin expression after neoadjuvant chemotherapy. When measured in the two sources, we demonstrated that fibronectin exhibited opposite expression patterns in small-EVs in response to chemotherapy. These findings highlight the importance of an ascites cell isolation workflow in investigating the treatment-induced cancer adaption processes.
2021
Small extracellular vesicles from malignant ascites of patients with advanced ovarian cancer provide insights into the dynamics of the extracellular matrix / Bortot B.; Apollonio M.; Rampazzo E.; Valle F.; Brucale M.; Ridolfi A.; Ura B.; Addobbati R.; Di Lorenzo G.; Romano F.; Buonomo F.; Ripepi C.; Ricci G.; Biffi S.. - In: MOLECULAR ONCOLOGY. - ISSN 1574-7891. - ELETTRONICO. - 15:12(2021), pp. 3596-3614. [10.1002/1878-0261.13110]
Bortot B.; Apollonio M.; Rampazzo E.; Valle F.; Brucale M.; Ridolfi A.; Ura B.; Addobbati R.; Di Lorenzo G.; Romano F.; Buonomo F.; Ripepi C.; Ricci G.; Biffi S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/859880
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