RESUMO
Objective To establish the golden hamster model of buccal squamous carcinoma and observe its biological character-istics .Methods 50 golden hamster were randomly divided into two group :experiment group (n=40) and control group(n=10) . Buccal mucosa of golden hamster were daubed by exposure 4-nitroquinoline-1-oxide (4NQO) in experiment group and tap water in control group .HE staining and immunohistochemistry were used to observe the tissue sample on the 8th and 12th week .The tissue samples of golden hamster buccal-mucosa cancer were used for the in-vitro subculture .Then flat cloning formation rate ,expression of CK and Vim ,and cell karyotype were detected .Results The observations of cell morphology and biology showed that the tissue of buccal squamous carcinoma were conformed to the basic characteristics of squamous carcinoma cell in 26 golden hamster(84 .6% ) after 12 weeks .The positive rate of CK and Vim were 96 .0% by immunohistochemical staining .The Chromosomes were tetraploid karyotype .Conclusion We successfully established the golden hamster model of buccal squamous carcinoma by the daub method of 4NQO .