Summary
Keratin expression in hamster tracheal epithelium was investigated during organ culture in serum-free, hormone-supplemented medium using monospecific monoclonal antibodies. Generally, tracheal basal cells expressed keratins detected by antibodies RCK102 and RCK103, while columnar epithelial cells were stained positively by RGE53, RCK103, RCK105 and HCK19. Metaplastic squamous cell foci reacted with antibodies RKSE60, RCK103 and HCK19. Early metaplastic alterations were more clearly RKSE60-positive than the mature lesions. In the vitamin A-depleted tracheas basal cells were clearly RCK102-positive. Superficial cells in the central part of areas of squamous metaplasia induced by cigarette smoke condensate expressed the basal cell keratins, and were negative for the columnar cell keratin 18 detected by the RGE53 antibody. This finding suggests that in cigarette smoke condensate-induced squamous metaplasia basal cells play an important role. The mucus-producing cells at the edges of metaplastic squamous cell foci expressed the keratins specific to columnar cells. Cigarette smoke condensate exposure accelerated epithelial keratinization compared to the vitamin A-depleted epithelium. It was concluded that not only small mucous granule cells, but also basal cells are involved in the development and maintenance of induced squamous metaplasia in tracheal epithelium. Furthermore, in vitro vitamin A-depleted epithelium did not coexpress vimentin in addition to the different keratins.
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Rutten, A.A.J.J.L., Bruyntjes, J.P. & Ramaekers, F.C.S. Effect of cigarette smoke condensate and vitamin A depletion on keratin expression patterns in cultured hamster tracheal epithelium. Virchows Archiv B Cell Pathol 56, 111–117 (1988). https://doi.org/10.1007/BF02890009
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DOI: https://doi.org/10.1007/BF02890009