Abstract:
:Many T cell responses are dominated by restricted TCR expression and can range from repeated usage of particular TCR Vbeta- and/or Valpha-elements, to the preferential usage of both V- and J-elements, often in conjunction with conserved V-D-J or V-J junctional sequences. Cytotoxic T lymphocytes specific for a Kb-restricted determinant from the herpes simplex virus glycoprotein B (gB) preferentially express a dominant TCRBV10 beta-chain with sequence conservation of a tryptophan-glycine located in the V-D junction. Here we have examined whether immunisation of C57BL/6 mice with the gB-peptide can mimic the CTL response seen after HSV-1 infection. Immunisation with the gB-peptide resulted in the generation of gB-specific CTL that showed a similar TCRBV10 bias to that observed after HSV-1 infection. When the gB-determinant was expressed as a part of a fusion protein, immunised mice again exhibited the TCRBV10 bias with the junctional sequence conservation in the responding CTL. C57BL/6 mice were then immunised with variants of the gB-peptide that contained amino acid substitutions at positions previously predicted to contact the TCR beta-chain CDR3. Analysis of the TCRBV usage of variant specific CTL lines showed that substitutions at the TCR-contact positions 4, 6 and 7 of the gB-peptide resulted in a loss of the TCRBV10 bias. These results suggest that the TCRBV10 bias seen in gB-specific CTL after HSV-1 infection is due to antigenic selection by the minimal peptide and is determined by residues proposed to contact the TCR beta-chain CDR3.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Turner SJ,Carbone FRdoi
10.1016/s0161-5890(98)00051-0subject
Has Abstractpub_date
1998-04-01 00:00:00pages
307-16issue
5eissn
0161-5890issn
1872-9142pii
S0161589098000510journal_volume
35pub_type
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