title: Abelson virus-transformed lymphocytes: null cells that modulate H-2.
abstract: A-MuLV-transformed lymphoid cells from Balb/c mice had the properties of null lymphocytes. They did not secrete Ig and all but one did not have detectable cell-associated Ig; one line synthesized, but did not secrete, the mu chain of IgM. The cells expressed H-2D and H-2K, but not H-21 histocompatibility antigens or theta-antigen; they had Fc receptors. Most cell lines grew to form donor cell tumors after inoculation into (Balb/c X C57B1/6)F1 mice. The tumor cells have more H-2Dd than cells passaged in vitro. Cell lines carried in vitro progressively lost H-2Dd. A line in which 5-30% of the cells were lysable by anti-H-2Dd was cloned; all eleven clones had H-2Dd (13-69% lysable) demonstrating that H-2 modulates in vitro. A clone with little H-2Dd (10-15% lysable) was tumorigenic even after treatment with anti-H-2Dd sera; at least 50% of the tumor cells were lysed by anti-H-2Dd. Thus A-MuLV-transformed lymphocytes modulate H-2 in vivo to higher levels and in vitro to lower levels.
mesh_terms: D000818:Animals; D002460:Cell Line; D002472:Cell Transformation, Viral; D002999:Clone Cells; D006649:Histocompatibility Antigens / Q000032:analysis; D007136:Immunoglobulins / Q000032:analysis; D009052:Leukemia Virus, Murine / Q000276:immunology; D007942:Leukemia, Experimental / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009368:Neoplasm Transplantation
chemical_list: D006649:Histocompatibility Antigens; D007136:Immunoglobulins