Inter-laboratory variability of A549 epithelial cells grown under submerged and air-liquid interface conditions

0552840 - ÚEM 2022 RIV GB eng J - Journal Article
Bartošová, Hana - Meldrum, K. - Karakocak, B.B. - Balog, S. - Doak, S.H. - Petri-Fink, A. - Clift, M.J.D. - Rothen-Rutishauser, B.
Inter-laboratory variability of A549 epithelial cells grown under submerged and air-liquid interface conditions.
Toxicology in Vitro. Roč. 75, sep. (2021), č. článku 105178. ISSN 0887-2333. E-ISSN 1879-3177
Institutional support: RVO:68378041
Keywords : standard operating procedure * in vitro model * alveolar epithelial cells * lung model * inter-laboratory assessment
OECD category: Toxicology
Impact factor: 3.685, year: 2021
Method of publishing: Open access
https://www.sciencedirect.com/science/article/pii/S088723332100103X?via%3Dihub

In vitro cell models offer a unique opportunity for conducting toxicology research, and the human lung adenocarcinoma cell line A549 is commonly used for toxicology testing strategies. It is essential to determine whether the response of these cells grown in different laboratories is consistent. In this study, A549 cells were grown under both submerged and air-liquid interface (ALI) conditions following an identical cell seeding protocol in two independent laboratories. The cells were switched to the ALI after four days of submerged growth, and their behaviour was compared to submerged conditions. The membrane integrity, cell viability, morphology, and (pro)inflammatory response upon positive control stimuli were assessed at days 3, 5, and 7 under submerged conditions and at days 5, 7, and 10 at the ALI. Due to the high variability of the results between the two laboratories, the experiment was subsequently repeated using identical reagents at one specific time point and condition (day 5 at the ALI). Despite some variability, the results were more comparable, proving that the original protocol necessitated improvements. In conclusion, the use of detailed protocols and consumables from the same providers, special training of personnel for cell handling, and endpoint analysis are critical to obtain reproducible results across independent laboratories.
Permanent Link: http://hdl.handle.net/11104/0327935