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Kawai, Norikazu; Ouji, Yukiteru; Sakagami, Masaharu; Tojo, Takashi; Sawabata, Noriyoshi; Yoshikawa, Masahide; Taniguchi, Shigeki
Experimental lung research, 07/2019, Volume: 45, Issue: 5-6Journal Article
Purpose: Although the isolation of rat and mouse mesothelial cells has previously been reported, most mesothelial cells used for experimental studies are obtained from peritoneal cells. Here, we describe an optimized method for the isolation and in vitro propagation of rodent pleural mesothelial cells without the requirement for specialized surgical techniques. Materials and Methods: To harvest pleural mesothelial cells, the pleural space of 8-9-week-old rats or older mice was filled with 0.25% trypsin in ethylenediaminetetraacetic acid (EDTA) buffer for 20 min at 37 °C. Cells were then harvested, and incubated at 37 °C in a humidified atmosphere with 5% CO 2 . Immunofluorescence analysis of plated pleural mesothelial cells was performed using Alexa 546 (calretinin). To investigate optimal proliferation conditions, medium enriched with various concentrations of fetal calf serum (FCS) was used for pleural mesothelial cell proliferation. Results: By day 10, confluent cell cultures were established, and the cells displayed an obvious cobblestone morphology. Immunofluorescence analysis of the cells demonstrated that all stained positive for Alexa 546 (calretinin) expression. Mesothelial cells grew better in medium containing 20% FCS than with 10% FCS. Conclusions: This is a simple procedure for the efficient collection of primary pleural mesothelial cells, which were obtained in defined culture conditions from the euthanized rodent thoracic cavity using trypsin-EDTA treatment. The ability to easily culture and maintain identifiable pleural mesothelial cells from rodents will be helpful for future experiments using these cells.
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