title: Isolation and characterization of a new murine MHC class II transcription mutant cell line.
abstract: We have isolated and characterized a new MHC class II transcription mutant cell line, called UV. This cell line was derived from the mouse B lymphoma A20 by UV light-induced mutagenesis and immunoselection for the loss of surface MHC class II molecules. It expresses only 5% of the level of MHC class II molecules on A20 and this is associated with a similar reduction of class II specific mRNA. This defect cannot be restored by the MHC class II transcription inducers, IL-4 and IFN gamma, confirming that the mutation acts at the transcription level. The mutation also affects MHC class I expression, but the transcription of class I molecules is not affected. In contrast, the expression of other markers, such as the invariant chain and the surface immunoglobulins G and M, is not modified. Such a variant should prove useful for the study of the transcription factors involved in the regulation of MHC class II expression.
authors.affiliation: Biology Department, University College London, U.K.
authors.forename: G
authors.initials: G
authors.lastname: Poirier
authors.forename: L
authors.initials: L
authors.lastname: Faulkner
authors.forename: B
authors.initials: B
authors.lastname: Chain
mesh_terms: D000818:Animals; D002460:Cell Line; D002462:Cell Membrane / Q000276:immunology; D005802:Genes, MHC Class II; D000949:Histocompatibility Antigens Class II / Q000096:biosynthesis / Q000235:genetics*; D016393:Lymphoma, B-Cell; D051379:Mice; D016296:Mutagenesis; D012333:RNA, Messenger / Q000032:analysis; D014158:Transcription, Genetic; D014407:Tumor Cells, Cultured / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D000949:Histocompatibility Antigens Class II; D012333:RNA, Messenger