Relationship between Rous sarcoma virus-induced expression of membrane antigen and phenotypic transformation

• Published in: Cancer research (Chicago, Ill.) Ill.), 1979-11, Vol.39 (11), p.4744
• Main Authors: Comoglio, P M, Pani, B, Prat, M, Tarone, G, Monti-Bragadin, C
• Format: Article
• Language: English
• Subjects: Animals; Antigens, Surface; Antigens, Viral; Avian Sarcoma Viruses - immunology; Bucladesine - pharmacology; Cell Line; Cell Transformation, Neoplastic - drug effects; Cricetinae; Genes; Phenotype; Tetradecanoylphorbol Acetate - pharmacology
• ISSN: 0008-5472

Rous sarcoma virus-transformed hamster BHK fibroblasts express a virus-induced cell surface antigen undetectable in cells either transformed by unrelated viruses or infected by transformation-defective strains of Rous sarcoma virus. To clarify whether this antigen plays any role in the process of malignant transformation or is expressed at the cell surface only as a consequence of the acquisition of the transformed phenotype, we have investigated its expression at the cell surface of Rous sarcoma virus-transformed BHK cells treated with dibutyryl cyclic adenosine 3':5'-monophosphate and at the surface of parental BHK cells transiently transformed by the tumor promoter phorbol myristate acetate. In the dibutyryl cyclic adenosine 3':5'-monophosphate-treated cells, in which most of the parameters of the transformed phenotype are reverted to normality, but the product of the transforming gene is still present, virus-induced cell surface antigen is expressed. In the mirror experiment, this antigen is not expressed by phenotypically transformed but genetically normal phorbol myristate acetate-treated cells. It is concluded that the tumor membrane antigen studied is intimately associated with the expression of the function(s) controlled by the transforming gene.