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Differentiation potential of a basal epithelial cell line established from human bronchial explant.

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Authors
Halldorsson, Skarphedinn
Asgrimsson, Valthor
Axelsson, Ivar
Gudmundsson, Gudmundur Hrafn
Steinarsdottir, Margret
Baldursson, Olafur
Gudjonsson, Thorarinn
Issue Date
2007-10-01

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Citation
In Vitro Cell. Dev. Biol. Anim. 2007, 43(8-9):283-9
Abstract
Due to the cellular complexity of the airway epithelium, it is important to carefully define bronchial cell lines that capture the phenotypic traits of a particular cell type. We describe the characterization of a human bronchial epithelial cell line, VA10. It was established by transfection of primary bronchial epithelial cells with retroviral constructs containing the E6 and E7 oncogenes from HPV16. The cell line has been cultured for over 2 yr, a total of 60 passages. Although prolonged culture resulted in increased chromosomal instability, no major phenotypic drift in marker expression was observed. The cells expressed cytokeratins 5, 13, 14, and 17 suggesting a basal-like phenotype. This was further supported by the expression of alpha6beta4 integrins and the basal cell-associated transcription factor p63. The VA10 cell line generated high transepithelial electrical resistance in suspended and air-liquid interface culture, indicating functionally active tight junction (TJ) complexes. Immunocytochemistry showed the typical reticular structures of occludin and TJ-associated F-actin. VA10 produced pseudostratified layer in air-liquid interface culture with expression of p63 restricted to the basal layer. Furthermore, VA10 produced round colonies when cultured in laminin-rich reconstituted basement membrane, and immunostaining of claudin-1 and the basolateral marker beta4 integrin revealed colonies that generated polarization as expected in vivo. These data indicate that VA10 epithelia have the potential to model the bronchial epithelium in vivo and may be useful to study epithelial regeneration and repair and the effect of chemicals and potential drug candidates on TJ molecules in airway epithelia.
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http://www.springerlink.com/content/1417253101507217
ae974a485f413a2113503eed53cd6c53
10.1007/s11626-007-9050-4
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English Journal Articles (Peer Reviewed)

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