Evidence for cooperation between TCR V region and junctional sequences in determining a dominant cytotoxic T lymphocyte response to herpes simplex virus glycoprotein B.
TCR repertoire availability has the potential to influence the immune response to foreign antigens. Here we have analysed how changes in V region availability influence the H-2b-restricted cytotoxic T lymphocyte (CTL) response to a dominant peptide determinant derived from the herpes simplex virus glycoprotein B (gB). We have previously shown that C57BL/6 mice mount a gB-specific, Kb-restricted CTL response which is dominated by a TCRBV10+ population and a TCRBV8S1+ subpopulation, both containing highly conserved CDR3 elements. We find that this dominant gB-specific CTL pool is lost in C57/L mice which have a different TCRBV haplotype. A population of CTL with diverse TCRBV and junctional sequence usage, which otherwise represents a minor subset in the gB-specific response, appears to emerge as a consequence of this TCRBV gene variation. The loss of preferential V region-encoded complementarity determining regions (CDR) 1- and/or CDR2-ligand interactions in this emerging population also results in a change in CDR3 sequence usage and a corresponding focusing of an otherwise promiscuous pattern of cross-reactivity with a panel of gB498-505 substitution analogues. This suggests that the difference between the two distinct TCR populations is the relative contributions of the CDR towards ligand recognition. Therefore, preferential V region-ligand interaction, at the expense of CDR3 peptide recognition, appears to control the dominant TCR selection in the C57BL/6 response to this peptide determinant.
Jones
C M
CM
Department of Pathology and Immunology, Monash Medical School, Prahran, Victoria, Australia.
Cose
S C
SC
Carbone
F R
FR
D000595:Amino Acid Sequence; D000818:Animals; D000956:Antigens, Viral / Q000235:genetics / Q000276:immunology; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic / Q000235:genetics; D018984:Epitopes, T-Lymphocyte / Q000378:metabolism; D015329:Gene Rearrangement, T-Lymphocyte; D005799:Genes, Dominant / Q000276:immunology; D006183:H-2 Antigens / Q000235:genetics; D018259:Herpesvirus 1, Human / Q000276:immunology*; D008024:Ligands; D008212:Lymphocyte Depletion; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic / Q000276:immunology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D013234:Stem Cells / Q000276:immunology / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000378:metabolism; D014759:Viral Envelope Proteins / Q000235:genetics / Q000276:immunology*
D000956:Antigens, Viral; D018984:Epitopes, T-Lymphocyte; D006183:H-2 Antigens; D008024:Ligands; D016693:Receptors, Antigen, T-Cell, alpha-beta; D014759:Viral Envelope Proteins; C040495:glycoprotein B, Simplexvirus