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Viral infection results in massive CD8+ T cell expansion and mortality in vaccinated perforin-deficient mice.

Abstract：

:Perforin-mediated cytotoxicity is essential for clearance of primary LCMV infection. BALB/c-perforin-deficient (PKO) mice survived LCMV infection by deleting NP(118)-specific CD8(+) T cells whereas vaccination of PKO mice with Listeria expressing NP(118) generated a stable memory CD8(+) T cell population. However, >85% of vaccinated BALB/c-PKO mice died after LCMV infection. Mortality was associated with enormous expansion of NP(118)-specific CD8(+) T cells in both lymphoid and nonlymphoid tissues and aberrant CD8(+) T cell cytokine production. Depletion of CD8(+) T cells or treatment with anti-IFNgamma antibody rescued vaccinated mice from mortality. Thus, perforin was essential for resistance to secondary LCMV infection, and, in the absence of perforin, vaccination resulted in lethal disease mediated by dysregulated CD8(+) T cell expansion and cytokine production.

journal_name

Immunity

journal_title

Immunity

authors

Badovinac VP,Hamilton SE,Harty JT

doi

10.1016/s1074-7613(03)00079-7

keywords:

subject

Has Abstract

pub_date

2003-04-01 00:00:00

pages

463-74

issue

4

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(03)00079-7

journal_volume

18

pub_type

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