title: The effect of passage in vitro and in vivo on the properties of murine fibrosarcomas I. Tumorigenicity and immunogenicity.
abstract: Cloned cell lines of chemically-induced murine fibrosarcomas maintained in tissue culture usually fail to grow when transplanted to normal syngeneic mice. They grow, however, in various categories of T cell deficient mice and after such passage grow readily in normal mice. Both cultured and mouse-passaged lines possess strong TATA. Three alternative explanations are suggested which might account for these findings. Emergence during the initial passage of a population of tumour cells resistant to NC cells. Acquisition during the initial passage of a protective surface molecule that interferes with the efferent side of the immune response when the tumour cells are subsequently transplanted to a normal host. Loss during the initial passage of a Class I MHC molecule which prevents dual recognition of the tumour cells by T cells when they are transplanted to a normal host. New experiments are proposed to distinguish between these possibilities.
mesh_terms: D000818:Animals; D002460:Cell Line; D002470:Cell Survival; D046508:Culture Techniques; D005260:Female; D005354:Fibrosarcoma / Q000139:chemically induced / Q000276:immunology / Q000473:pathology*; D008748:Methylcholanthrene; D051379:Mice; D008808:Mice, Inbred CBA; D008819:Mice, Nude; D009368:Neoplasm Transplantation
chemical_list: D008748:Methylcholanthrene