Ultrasonic cavitation induces necrosis and impairs growth in three-dimensional models of pancreatic ductal adenocarcinoma

Einas Abou Ali, Benoit Bordacahar, Jean-Louis Mestas, Frederic Batteux, Cyril Lafon, Marine Camus and Frederic Prat

PLOS ONE, 2018, vol. 13, issue 12, 1-14

Abstract: Introduction: Pancreatic ductal adenocarcinoma (PDAC) is a rapidly increasing cause of mortality whose dismal prognosis is mainly due to overwhelming chemoresistance. New therapeutic approaches include physical agents such as ultrasonic cavitation, but clinical applications require further insights in the mechanisms of cytotoxicity. 3-D in vitro culture models such as spheroids exploit realistic spatial, biochemical and cellular heterogeneity that may bridge some of the experimental gap between conventional in vitro and in vivo experiments. Purpose: To assess the feasibility and efficiency of inertial cavitation associated or not with chemotherapy, in a spheroid model of PDAC. Methods: We used DT66066 cells, derived from a genetically-engineered murine PDAC, isolated from KPC-transgenic mice (LSL-KrasG12D/+; LSL-Trp53R172H/+; Pdx-1- Cre). Spheroids were obtained by either a standard centrifugation-based method, or by using a magnetic nano-shuttle method allowing the formation of spheroids within 24 hours and facilitating their handling. The spheroids were exposed to ultrasonic inertial cavitation in a specially designed setup. Eight or nine spheroids were analyzed for each of 4 conditions: control, gemcitabine alone, US cavitation alone, US cavitation + gemcitabine. Five US inertial cavitation indexes, corresponding to increased US intensities, were evaluated. The effectiveness of treatment was assessed after 24 hours with the following criteria: spheroid size (growth), ratio of phase S-entered cells (proliferation), proportion of cells in apoptosis or necrosis (mortality). These parameters were assessed by quantitative immunofluorescence techniques. Results: The 3D culture model presented excellent reproducibility. Cavitation induced a significant decrease in the size of spheroids, an effect significantly correlated to an increasing cavitation index (p

Date: 2018
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0209094 (text/html)
https://journals.plos.org/plosone/article/file?id= ... 09094&type=printable (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0209094

DOI: 10.1371/journal.pone.0209094

Access Statistics for this article

More articles in PLOS ONE from Public Library of Science
Bibliographic data for series maintained by plosone ().