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Duration of infection and antigen display have minimal influence on the kinetics of the CD4+ T cell response to Listeria monocytogenes infection
Journal article   Peer reviewed

Duration of infection and antigen display have minimal influence on the kinetics of the CD4+ T cell response to Listeria monocytogenes infection

Gail A Corbin and John T Harty
The Journal of immunology (1950), Vol.173(9), pp.5679-5687
11/01/2004
DOI: 10.4049/jimmunol.173.9.5679
PMID: 15494519

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Abstract

The T cell response to infection consists of clonal expansion of effector cells, followed by contraction to memory levels. It was previously thought that the duration of infection determines the magnitude and kinetics of the T cell response. However, recent analysis revealed that transition between the expansion and contraction phases of the Ag-specific CD8+ T cell response is not affected by experimental manipulation in the duration of infection or Ag display. We studied whether the duration of infection and Ag display influenced the kinetics of the Ag-specific CD4+ T cell response to Listeria monocytogenes (LM) infection. We found that truncating infection and Ag display with antibiotic treatment as early as 24 h postinfection had minimal impact on the expansion or contraction of CD4+ T cells; however, the magnitudes of the Ag-specific CD4+ and CD8+ T cell responses were differentially affected by the timing of antibiotic treatment. Treatment of LM-infected mice with antibiotics at 24 h postinfection did not prevent generation of detectable CD4+ and CD8+ memory T cells at 28 days after infection, vigorous secondary expansion of these memory T cells, or protection against a subsequent LM challenge. These results demonstrate that events within the first few days of infection stimulate CD4+ and CD8+ T cell responses that are capable of carrying out the full program of expansion and contraction to functional memory, independently of prolonged infection or Ag display.
Listeriosis - drug therapy Antigens, Bacterial - immunology Male Ampicillin - administration & dosage Listeria monocytogenes - immunology CD4-Positive T-Lymphocytes - immunology Histocompatibility Antigens Class I - metabolism Immunization, Secondary Peptide Fragments - immunology Listeriosis - immunology CD8-Positive T-Lymphocytes - metabolism Female Epitopes, T-Lymphocyte - immunology Cell Line Peptide Fragments - metabolism CD4-Positive T-Lymphocytes - microbiology CD8-Positive T-Lymphocytes - microbiology Hemolysin Proteins Bacterial Toxins - immunology Heat-Shock Proteins - metabolism Mice, Inbred C57BL CD4-Positive T-Lymphocytes - metabolism Histocompatibility Antigens Class I - immunology Listeria monocytogenes - growth & development Heat-Shock Proteins - immunology Bacterial Toxins - metabolism Animals Immunologic Memory Listeriosis - microbiology Mice Kinetics CD8-Positive T-Lymphocytes - immunology Antigens, Bacterial - metabolism Epitopes, T-Lymphocyte - metabolism Listeria monocytogenes - drug effects

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