Genes of canine adenovirus type 2 (CAd2) involved in transformation were localized and their functions investigated. Cells transformed by CAd2 whole DNA or the HI A fragment (leftmost 47%) totally lacked contact inhibition and were serum-independent, anchorage-independent and tumorigenic in newborn rats. All the cells transformed by the I D (0 to 15.2%) and the RI C (0 to 11.3%) fragments were morphologically transformed, but were serum-dependent, anchorage-dependent and not tumorigenic in newborn rats after 150 and 190 days observation, respectively, when 5 × 10 cells per rat were injected. No transforming activities were detected by DNA fragments smaller than RI C. By Northern blot hybridization, it was shown that a 1 kb mRNA was encoded in the 0 to 45% region of the genome, and 1.1 kb and 2 kb RNAs in the 4.5 to 11% region. It was therefore suggested that these gene products are required for morphological transformation, and other gene(s) or element(s), which have not been identified, may be involved in serum independence, anchorage independence and tumorigenicity of the transformed cells.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error