Abstract
Two rat thyroid epithelial differentiated cell lines, PC Cl 3 and PC myc, were infected with the polyoma murine leukemia virus (PyMLV) carrying the Middle-T-antigen gene of polyomavirus. After infection, both cell lines acquired the typical markers of neoplastic transformation; however, the PC myc cells showed a greater malignant phenotype. Furthermore, the thyroid differentiated functions were completely suppressed in PC myc cells transformed by PyMLV, whereas they were, at least partially, retained in PC Cl 3 cells transformed by PyMLV, and in particular, thyroglobulin synthesis and secretion were not affected at all. Since no differences in the expression of the middle-T-antigen gene were observed in the two PyMLV-transformed cell lines, the different properties shown by these two infected cell lines must be ascribed to the expression of the c-myc oncogene.
MeSH Terms
Animals
Antigens, Polyomavirus Transforming/physiology
Cell Line
Cell Transformation, Neoplastic/genetics
Epithelium
Genes, Viral
Humans
Oncogenes
Polyomavirus/genetics,physiology
Proto-Oncogene Proteins/physiology
Proto-Oncogene Proteins c-myc
Rats
Rats, Inbred F344
Thyroglobulin/metabolism
Thyroid Gland
Chemicals
Antigens, Polyomavirus Transforming
Proto-Oncogene Proteins
Proto-Oncogene Proteins c-myc
Thyroglobulin
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Berlingieri M T
Dipartimento di Biologia e Patologia Cellulare e Molecolare, II Facoltà di Medicina e Chirurgia, Università di Napoli, Italy.
Portella G
Grieco M
Santoro M
Fusco A
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