title: c-myc Gene rearrangements involving gamma immunoglobulin heavy chain gene switch regions in murine plasmacytomas.
abstract: In murine plasmacytomas, the c-myc gene has frequently been found to undergo rearrangement by virtue of a T(12;15) chromosome translocation. The immunoglobulin heavy chain gene switch region (S alpha) constitutes the target for most of these recombinations particularly in IgA producing plasmacytomas. We sought to identify non-S alpha myc target sites in several IgG producing tumors. The c-myc target in MPC-11 (a BALB/c IgG2b producing plasmacytoma) has been cloned, localized to the Igh-C locus and identified as the gamma 2a heavy chain gene switch region (S gamma 2a). Furthermore, by Southern blot hybridization, we have determined that the S gamma 2b region is the c-myc target in two NZB IgG2b producing plasmacytomas. The potential relation between Ig class expressed and c-myc translocation target is discussed.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D005796:Genes; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D051379:Mice; D008815:Mice, Inbred Strains; D009693:Nucleic Acid Hybridization; D010954:Plasmacytoma / Q000235:genetics / Q000276:immunology*; D013045:Species Specificity
chemical_list: D007143:Immunoglobulin Heavy Chains; D004262:DNA Restriction Enzymes