Virus-specific CD8+ T-cell Responses in Mice Transgenic for a T-cell Receptor Beta Chain Selected at Random
Overview
Authors
Affiliations
The consequences of severely limiting the T-cell receptor (TCR) repertoire available for the response to intranasal infection with an influenza A virus or with Sendai virus have been analyzed by using H-2k mice (TG8.1) transgenic for a TCR beta-chain gene (V beta 8.1D beta 2J beta 2.3C beta 2). Analyzing the prevalence of V beta 8.1+ CD8+ T cells in lymph node cultures from nontransgenic (non-TG) H-2k controls primed with either virus and then stimulated in vitro with the homologous virus or with anti-CD3 epsilon showed that this TCR is not normally selected from the CD8+ T-cell repertoire during these infections. However, the TG8.1 mice cleared both viruses and generated virus-specific effector cytotoxic T lymphocytes (CTL) and memory CTL precursors, though the responses were delayed compared with the non-TG controls. Depletion of the CD4+ T-cell subset had little effect on the course of influenza virus infection but substantially slowed the development of the Sendai virus-specific CTL response and virus elimination in both the TG8.1 and non-TG mice, indicating that CD4+ helpers are promoting the CD8+ T-cell response in the Sendai virus model. Even so, restricting the available T-cell repertoire to lymphocytes expressing a single TCR beta chain still allows sufficient TCR diversity for CD8+ T cells (acting in the presence or absence of the CD4+ subset) to limit infection with an influenza A virus and a parainfluenza type 1 virus.
Hayward A, Wang L, Goonetilleke N, Fragaszy E, Bermingham A, Copas A Am J Respir Crit Care Med. 2015; 191(12):1422-31.
PMID: 25844934 PMC: 4476562. DOI: 10.1164/rccm.201411-1988OC.
Heterologous immunity between viruses.
Welsh R, Che J, Brehm M, Selin L Immunol Rev. 2010; 235(1):244-66.
PMID: 20536568 PMC: 2917921. DOI: 10.1111/j.0105-2896.2010.00897.x.
Huang C, Shah S, Nguyen P, Altman J, Blackman M J Virol. 2002; 76(13):6852-6.
PMID: 12050400 PMC: 136287. DOI: 10.1128/jvi.76.13.6852-6856.2002.
A mouse model for infectious mononucleosis.
Flano E, Woodland D, Blackman M Immunol Res. 2002; 25(3):201-17.
PMID: 12018460 DOI: 10.1385/IR:25:3:201.
OBrien D, Burns Jr R, Shastri N, Barth R Immunology. 1997; 91(3):375-82.
PMID: 9301526 PMC: 1364006. DOI: 10.1046/j.1365-2567.1997.00281.x.