title: Genotypic analysis of B cell colonies by in situ hybridization. Stoichiometric expression of three VH families in adult C57BL/6 and BALB/c mice.
abstract: The filter paper disc method for cloning inducible lymphocytes was used to census the splenic B cell population of C57BL/6 and BALB/c mice for the expression of three VH gene-families, VH X-24, -Q52, and -J558. B cell colonies, arising from single founder lymphocytes, were identified by in situ hybridization with VH family- and C mu-specific cDNA probes. Some 6.7 X 10(4) C mu+ colonies were screened. Among C57BL/6- or BALB/c-derived colonies, approximately 3% were VH X-24+, approximately 19% were VH Q52+, and approximately 54% were VH J558+. These frequencies are consistent with a process of equiprobable expression for individual VH segments, and provide direct evidence that normal splenic B lymphocytes use a process of random genetic combinatorics to generate the antibody repertoire.
mesh_terms: D000818:Animals; D000916:Antibody Diversity; D001402:B-Lymphocytes / Q000276:immunology*; D002455:Cell Division; D002460:Cell Line; D004247:DNA / Q000235:genetics; D014644:Genetic Variation; D005838:Genotype; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007135:Immunoglobulin Variable Region / Q000235:genetics*; D008070:Lipopolysaccharides / Q000494:pharmacology; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D009693:Nucleic Acid Hybridization; D013154:Spleen / Q000166:cytology
chemical_list: D007143:Immunoglobulin Heavy Chains; D007135:Immunoglobulin Variable Region; D008070:Lipopolysaccharides; D004247:DNA