Abstract
A system of epithelial cells is described in which it is possible to study the number and the nature of genes capable of conferring the malignant phenotype. Two fully differentiated, hormone-responsive cell lines from rat thyroid glands are presented which are susceptible to one-step or two-step transformation upon infection with several murine acute retroviruses. After infection, both cell lines became independent from their thyrotropic hormone requirement for growth. However, complete transformation was achieved with one of the cell lines (FRTL-5 Cl 2), whereas the other cell line (PC Cl 3) failed to grow in agar and to give rise to tumors in vivo. The latter cell line was susceptible to complete transformation upon cooperation of the v-ras-Ha and the human c-myc oncogenes.
MeSH Terms
Animals
Cell Differentiation
Cell Line, Transformed
Cell Transformation, Viral
Epithelial Cells
Epithelium/physiology
Iodides/metabolism
Neoplasms, Experimental/genetics
Oncogenes
RNA, Messenger/genetics
RNA, Neoplasm/genetics
Rats
Retroviridae/genetics,pathogenicity
Thyroglobulin/biosynthesis
Thyroid Gland/cytology,physiology
Chemicals
Iodides
RNA, Messenger
RNA, Neoplasm
Thyroglobulin
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Fusco A
Dipartimento di Biologia e Patologia Cellulare e Molecolare, L. Califano II Facoltà di Medicina e Chirurgia, Università di Napoli, Italy.
Berlingieri M T
Di Fiore P P
Portella G
Grieco M
Vecchio G
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