deoxycholic-acid and Mesonephroma

The possibility to use the rat visceral yolk sac as a model for the study of processes of cell transformation was studied. Yolk sac teratocarcinomas could be induced using the method of in vitro culture of yolk sacs in a medium containing a direct carcinogen and a tumor promoter with subsequent transplantation under the renal or testicular capsule of syngeneic rats. Biochemical, electron-microscopic and immunohistochemical methods were used to study the characteristic changes that accompanied cellular transformation. It was shown that even a short-term (3 h) exposure of the yolk sac cells to N-methyl-N'-nitro-N-nitrosoguanidine with or without deoxycholic acid in vitro decreased significantly the rate of yolk sac transport and changed their developmental potential with manifestation of carcinogenic antigens (polyclonal keratins, monoclonal vimentin and smooth muscle actin). This cancerous transformation was promoted following their in vivo transplantation into special anatomic sites.

Topics: Animals; Cell Transformation, Neoplastic; Cells, Cultured; Deoxycholic Acid; Endoderm; Female; Immunohistochemistry; Male; Mesonephroma; Methylnitronitrosoguanidine; Neoplasm Transplantation; Pregnancy; Rats; Rats, Inbred Strains; Teratoma; Testis; Tumor Cells, Cultured; Vimentin; Yolk Sac