TY - JOUR
T1 - Temperature-sensitive SV40-immortalized rat middle ear epithelial cells
AU - Toyama, Katsuhiro
AU - Paparella, Michael M.
AU - Kim, Youngki
AU - Lin, Jizhen
PY - 2004/12
Y1 - 2004/12
N2 - The proliferation and differentiation of middle ear epithelial cells are essential in both normal and diseased middle ears. The normal situation involves physiologic growth and renewal of the epithelium, and the diseased situation involves pathological changes of the epithelium such as mucous cell metaplasia and ciliated cell proliferation in otitis media. In this study, we used a temperature-sensitive large T antigen (the SV40 mutant) to transduce and immortalize the primary culture of middle ear epithelial cells. SV40-immortalized middle ear epithelial cells have been cultured for more than 50 passages and are stable morphologically. Their nonimmortalized parent cells died at the second passage. Immortalized middle ear epithelial cells carrying the SV40 mutant show a monolayer, cobblestonelike morphology. The cell line expresses characteristic middle ear mucosal molecules such as mucins, keratins, and collagens. It also responds to temperature changes; namely, cells proliferate at 33°C, when the SV40 antigen is active, and differentiate at 39°C, when the SV40 antigen is inactive. Therefore, we conclude that a temperature-sensitive middle ear epithelial cell line has successfully been established.
AB - The proliferation and differentiation of middle ear epithelial cells are essential in both normal and diseased middle ears. The normal situation involves physiologic growth and renewal of the epithelium, and the diseased situation involves pathological changes of the epithelium such as mucous cell metaplasia and ciliated cell proliferation in otitis media. In this study, we used a temperature-sensitive large T antigen (the SV40 mutant) to transduce and immortalize the primary culture of middle ear epithelial cells. SV40-immortalized middle ear epithelial cells have been cultured for more than 50 passages and are stable morphologically. Their nonimmortalized parent cells died at the second passage. Immortalized middle ear epithelial cells carrying the SV40 mutant show a monolayer, cobblestonelike morphology. The cell line expresses characteristic middle ear mucosal molecules such as mucins, keratins, and collagens. It also responds to temperature changes; namely, cells proliferate at 33°C, when the SV40 antigen is active, and differentiate at 39°C, when the SV40 antigen is inactive. Therefore, we conclude that a temperature-sensitive middle ear epithelial cell line has successfully been established.
KW - Immortalization
KW - Middle ear epithelial cell
KW - Otitis media
KW - Sprague-Dawley rat
UR - http://www.scopus.com/inward/record.url?scp=10644242585&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=10644242585&partnerID=8YFLogxK
U2 - 10.1177/000348940411301206
DO - 10.1177/000348940411301206
M3 - Article
C2 - 15633899
AN - SCOPUS:10644242585
SN - 0003-4894
VL - 113
SP - 967
EP - 974
JO - Annals of Otology, Rhinology and Laryngology
JF - Annals of Otology, Rhinology and Laryngology
IS - 12
ER -