title: Haplotypic origin of beta-chain genes expressed by human T-cell clones.
abstract: A contribution of allelic variation of T-cell receptor (Tcr) genes to the immune response has not been studied. Here we report that the presence of insertion-deletion-related polymorphisms (IDRP) of the Tcr beta chain (Tcrb) can be utilized to distinguish the parental origin of the gene complex that undergoes rearrangement in individual T-cell clones. Phytohemagglutinin stimulated clones from an individual heterozygous for an IDRP located between the variable (V) and diversity (D)-joining (J) region genes were studied for the presence of V to DJ rearrangements in each of the two parental chromosomes. Results indicate that single rearrangements were present in the majority of clones, in contrast to the double rearrangements of D to J genes that were generally present. In this individual, V to DJ rearrangement also occurred with different frequencies on each of the two germline genes. IDRP clonotyping of the Tcrb complex should prove generally applicable to the study of the influence of allelic variation of Tcrb genes in selection of the expressed T-cell repertoire.
authors.affiliation: Neuroimmunology Unit, Massachusetts General Hospital, Boston 02114.
authors.forename: E
authors.initials: E
authors.lastname: Seboun
authors.forename: N
authors.initials: N
authors.lastname: Joshi
authors.forename: S L
authors.initials: SL
authors.lastname: Hauser
mesh_terms: D000483:Alleles; D002872:Chromosome Deletion; D002999:Clone Cells; D004251:DNA Transposable Elements / Q000235:genetics; D016521:Electrophoresis, Gel, Pulsed-Field; D015870:Gene Expression; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor; D006239:Haplotypes / Q000235:genetics*; D006801:Humans; D011110:Polymorphism, Genetic / Q000235:genetics*; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics*
chemical_list: D004251:DNA Transposable Elements; D016693:Receptors, Antigen, T-Cell, alpha-beta