20.500.12556/RUL-144815 Standardization of esophageal adenocarcinoma in vitro model and its applicability for model drug testing FLO-1 cell line represents an important tool in esophageal adenocarcinoma (EAC) research as a verifed and authentic cell line to study the disease pathophysiology and antitumor drug screenings. Since in vitro characteristics of cells depend on the microenvironment and culturing conditions, we performed a thorough characterization of the FLO-1 cell line under diferent culturing conditions with the aim of (1) examining the efect of serum-free growth medium and air–liquid interface (A–L) culturing, which better refect physiological conditions in vivo and (2) investigating the diferentiation potential of FLO-1 cells to mimic the properties of the in vivo esophageal epithelium. Our study shows that the composition of the media infuenced the morphological, ultrastructural and molecular characteristics of FLO-1 cells, such as the expression of junctional proteins. Importantly, FLO-1 cells formed spheres at the A–L interface, recapitulating key elements of tumors in the esophageal tube, i.e., direct contact with the gas phase and three-dimensional architecture. On the other hand, FLO-1 models exhibited high permeability to model drugs and zero permeability markers, and low transepithelial resistance, and therefore poorly mimicked normal esophageal epithelium. In conclusion, the identifed efect of culture conditions on the characteristics of FLO-1 cells should be considered for standardization, data reproducibility and validity of the in vitro EAC model. Moreover, the sphere-forming ability of FLO-1 cells at the A–L interface should be considered in EAC tumor biology and anticancer drug studies as a reliable and straightforward model with the potential to increase the predictive efciency of the current in vitro approaches. esophageal adenocarcinoma FLO-1 cell line disease pathophysiology biological techniques cancer cell biology diseases drug discovery engineering oncology adenokarcinom požiralnika celična linija FLO-1 patofiziologija bolezni true false true Angleški jezik Slovenski jezik Članek v reviji 2023-03-14 14:36:48 2023-03-14 14:36:53 2023-03-15 03:30:56 0000-00-00 00:00:00 2021 0 0 23 str. Vol. 11, art. 6664 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 616.1 2045-2322 10.1038/s41598-021-85530-w 56692995 RAZ_Tratnjek_Larisa_2021.pdf RAZ_Tratnjek_Larisa_2021.pdf 1 766F1DD5E30FB691C55DE1D22D4A86D1 0e507f6d94f51318bcc2f7ae6aab0167a8cd736fe3e4da65f5234453461b9565 3c072e0e-c26d-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167353 https://www.nature.com/articles/s41598-021-85530-w 0 5d2c3614-c26d-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167354 Medicinska fakulteta Fakulteta za farmacijo 0 0 0