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Novel air-liquid interface culture model to investigate stiffness-dependent behaviors of alveolar epithelial cells
Ist Teil von
Biochemical and biophysical research communications, 2024-05, Vol.708, p.149791-149791, Article 149791
Ort / Verlag
United States: Elsevier Inc
Erscheinungsjahr
2024
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
Pulmonary alveoli are functional units in gas exchange in the lung, and their dysfunctions in lung diseases such as interstitial pneumonia are accompanied by fibrotic changes in structure, elevating the stiffness of extracellular matrix components. The present study aimed to test the hypothesis that such changes in alveoli stiffness induce functional alteration of epithelial cell functions, exacerbating lung diseases. For this, we have developed a novel method of culturing alveolar epithelial cells on polyacrylamide gel with different elastic modulus at an air-liquid interface. It was demonstrated that A549 cells on soft gels, mimicking the modulus of a healthy lung, upregulated mRNA expression and protein synthesis of surfactant protein C (SFTPC). By contrast, the cells on stiff gels, mimicking the modulus of the fibrotic lung, exhibited upregulation of SFTPC gene expression but not at the protein level. Cell morphology, as well as cell nucleus volume, were also different between the two types of gels.
•Stiffness-dependent regulation of alveolar epithelial cell (A549) function was studied.•Novel air-liquid interface culture model was developed using polyacrylamide gel.•Soft and stiff gels mimicked elastic modulus of healthy and fibrotic lung tissues.•Soft gel selectively induced type II alveolar epithelial cell functions.•Stiff environments induced non-physiological epithelial functions.