title: Relationship between the amounts of EBV-DNA and EBNA per cell, clonability and tumorigenicity in two ebv-negative lymphoma lines and their EBV-converted sublines.
abstract: The effect of EBV-conversion of two EBV-negative lymphoma lines (Ramos and BJAB) on agarose clonability and tumorigenicity in nude mice was explored. The cloning frequency was increased in all 9 sublines investigated, between 1.1 and 4.9 times compared to the original "parental" lines. Tumorigenicity was increased in one out of 2 BJAB-derived, EBV-positive lines and in 3 of 6 Ramos-derived lines, while it was decreased in 3 others. A strong positive correlation between the number of genomes/cell and the amount of EBNA/cell was detected, and in 7 of 9 converted lines the cloning frequency also correlated to the number of EBV genomes. On the other hand, no relation was established between the number of EBV-genomes/cell, the amount of EBNA/cell and tumorigenicity.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000032:analysis*; D002051:Burkitt Lymphoma / Q000276:immunology / Q000382:microbiology*; D002460:Cell Line; D002467:Cell Nucleus / Q000276:immunology; D002471:Cell Transformation, Neoplastic; D002999:Clone Cells; D004279:DNA, Viral / Q000032:analysis*; D019309:Epstein-Barr Virus Nuclear Antigens; D005814:Genes, Viral; D004854:Herpesvirus 4, Human / Q000276:immunology*; D006801:Humans; D051379:Mice; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D009374:Neoplasms, Experimental / Q000276:immunology / Q000382:microbiology; D014183:Transplantation, Heterologous
chemical_list: D000956:Antigens, Viral; D004279:DNA, Viral; D019309:Epstein-Barr Virus Nuclear Antigens