Fas-dependent CD4+ cytotoxic T-cell-mediated pathogenesis during virus infection

Allan J. Zajac, Daniel G. Quinn, Philip L. Cohen, Jeffrey A Frelinger

Research output: Contribution to journalArticle

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Abstract

β2-Microglobulin-deficient (β2m-) mice generate a CD4+ major histocompatibility complex class II-restricted cytotoxic T-lymphocyte (CTL) response following infection with lymphocytic choriomeningitis (LCM) virus (LCMV). We have determined the cytotoxic mechanism used by these CD4+ CTLs and have examined the role of this cytotoxic activity in pathogenesis of LCM disease in β2m- mice. Lysis of LCMV-infected target cells by CTLs from β2m- mice is inhibited by addition of soluble Fas-Ig fusion proteins or by pretreatment of the CTLs with the protein synthesis inhibitor emetine. In addition, LCMV-infected cell lines that are resistant to anti-Fas-induced apoptosis are refractory to lysis by these virus-specific CD4+ CTLs. These data indicate that LCMV-specific CD4+ CTLs from β2m- mice use a Fas-dependent lytic mechanism. Intracranial (i.c.) infection of β2m- mice with LCMV results in loss of body weight. Fasdeficient β2m-.lpr mice develop a similar wasting disease following i.c. infection. This suggests that Fas-dependent cytotoxicity is not required for LCMV-induced weight loss. A potential mediator of this chronic wasting disease is tumor necrosis factor (TNF)-α, which is produced by LCMV-specific CD4+ CTLs. In contrast to LCMV-induced weight loss, lethal LCM disease in β2m- mice is dependent on Fas-mediated cytotoxicity. Transfer of immune splenocytes from LCMV-infected β2m- mice into irradiated infected β2m- mice results in death of recipient animals. In contrast, transfer of these splenocytes into irradiated infected β2m-.lpr mice does not cause death. Thus a role for CD4+ T-cell-mediated cytotoxicity in virus-induced immunopathology has now been demonstrated.

Original languageEnglish (US)
Pages (from-to)14730-14735
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume93
Issue number25
StatePublished - Dec 10 1996
Externally publishedYes

Fingerprint

Lymphocytic choriomeningitis virus
Virus Diseases
T-Lymphocytes
Lymphocytic Choriomeningitis
Weight Loss
Chronic Wasting Disease
Infection
Emetine
Wasting Syndrome
Viruses
Protein Synthesis Inhibitors
Cytotoxic T-Lymphocytes
Major Histocompatibility Complex
Cause of Death
Tumor Necrosis Factor-alpha
Body Weight
Apoptosis
Cell Line

ASJC Scopus subject areas

  • General
  • Genetics

Cite this

Fas-dependent CD4+ cytotoxic T-cell-mediated pathogenesis during virus infection. / Zajac, Allan J.; Quinn, Daniel G.; Cohen, Philip L.; Frelinger, Jeffrey A.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 93, No. 25, 10.12.1996, p. 14730-14735.

Research output: Contribution to journalArticle

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