Bovine herpesvirus 1 can infect CD4+ T lymphocytes and induce programmed cell death during acute infection of cattle

M. T C Winkler, Alan R Doster, C. Jones

Research output: Contribution to journalArticle

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Abstract

Acute infection of cattle with bovine herpesvirus 1 (BHV-1) represses cell-mediated immunity, which can lead to secondary bacterial infections. Since BHV-1 can induce apoptosis of cultured lymphocytes, we hypothesized that these virus-host interactions occur in cattle. To test this hypothesis, we analyzed lymph nodes and peripheral blood mononuclear cells (PBMC) after calves were infected with BHV-1. In situ terminal deoxynucleotidyltransferase-mediated dUTP nick end-labeling (TUNEL) staining of lymphoid tissues (pharyngeal tonsil, cervical, retropharyngeal, and inguinal) was used to detect apoptotic cells. Calves infected with BHV-1 for 7 days revealed increased apoptotic cells near the corticomedullary junction in lymphoid follicles and in the subcapsular region. Increased frequency of apoptotic cells was also observed in the mucosa-associated lymphoid tissue lining the trachea and turbinate. Immunohistochemistry of consecutive sections from pharyngeal tonsil revealed that CD2+ T lymphocytes were positive for the BHV-1 envelope glycoprotein gD. The location of these CD2+ T lymphocytes in the germinal center suggested that they were CD4+ T cells. Electron microscopy and TUNEL also revealed apoptotic and herpesvirus- infected lymphocytes from this area. Fluorescence-activated cell sorting analyses demonstrated that CD4+ and CD8+ T cells decreased in lymph nodes and PBMC after infection. The decrease in CD4+ T cells correlated with an increase in apoptosis. CD4+ but not CD8+ lymphocytes were infected by BHV-1 as judged by in situ hybridization and PCR, respectively. Immediate-early (bovine ICP0) and early (ribonucleotide reductase) transcripts were detected in PBMC and CD4+ lymphocytes prepared from infected calves. In contrast, a late transcript (glycoprotein C) was not consistently detected suggesting productive infection was not efficient. Taken together, these results indicate that BHV-1 can infect CD4+ T cells in cattle, leading to apoptosis and suppression of cell-mediated immunity.

Original languageEnglish (US)
Pages (from-to)8657-8668
Number of pages12
JournalJournal of virology
Volume73
Issue number10
StatePublished - Sep 29 1999

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Bovine Herpesvirus 1
Bovine herpesvirus 1
Cell Death
apoptosis
T-lymphocytes
T-Lymphocytes
cattle
Infection
infection
Lymphocytes
lymphocytes
mononuclear leukocytes
Adenoids
Blood Cells
In Situ Nick-End Labeling
Lymphoid Tissue
Apoptosis
Cellular Immunity
calves
cell-mediated immunity

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

Cite this

Bovine herpesvirus 1 can infect CD4+ T lymphocytes and induce programmed cell death during acute infection of cattle. / Winkler, M. T C; Doster, Alan R; Jones, C.

In: Journal of virology, Vol. 73, No. 10, 29.09.1999, p. 8657-8668.

Research output: Contribution to journalArticle

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abstract = "Acute infection of cattle with bovine herpesvirus 1 (BHV-1) represses cell-mediated immunity, which can lead to secondary bacterial infections. Since BHV-1 can induce apoptosis of cultured lymphocytes, we hypothesized that these virus-host interactions occur in cattle. To test this hypothesis, we analyzed lymph nodes and peripheral blood mononuclear cells (PBMC) after calves were infected with BHV-1. In situ terminal deoxynucleotidyltransferase-mediated dUTP nick end-labeling (TUNEL) staining of lymphoid tissues (pharyngeal tonsil, cervical, retropharyngeal, and inguinal) was used to detect apoptotic cells. Calves infected with BHV-1 for 7 days revealed increased apoptotic cells near the corticomedullary junction in lymphoid follicles and in the subcapsular region. Increased frequency of apoptotic cells was also observed in the mucosa-associated lymphoid tissue lining the trachea and turbinate. Immunohistochemistry of consecutive sections from pharyngeal tonsil revealed that CD2+ T lymphocytes were positive for the BHV-1 envelope glycoprotein gD. The location of these CD2+ T lymphocytes in the germinal center suggested that they were CD4+ T cells. Electron microscopy and TUNEL also revealed apoptotic and herpesvirus- infected lymphocytes from this area. Fluorescence-activated cell sorting analyses demonstrated that CD4+ and CD8+ T cells decreased in lymph nodes and PBMC after infection. The decrease in CD4+ T cells correlated with an increase in apoptosis. CD4+ but not CD8+ lymphocytes were infected by BHV-1 as judged by in situ hybridization and PCR, respectively. Immediate-early (bovine ICP0) and early (ribonucleotide reductase) transcripts were detected in PBMC and CD4+ lymphocytes prepared from infected calves. In contrast, a late transcript (glycoprotein C) was not consistently detected suggesting productive infection was not efficient. Taken together, these results indicate that BHV-1 can infect CD4+ T cells in cattle, leading to apoptosis and suppression of cell-mediated immunity.",
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