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J. Exp. Med.,
Volume 187, Number 1, January 5, 1998 1-14
(MIP-1
)-dependent Pathways
By
From the Department of Molecular Microbiology and Immunology, Division of Biology and Medicine,
Brown University, Providence, Rhode Island 02912
Natural killer (NK) cells mediate defense against early murine cytomegalovirus (MCMV) infections in liver. The chemokine, macrophage inflammatory protein 1
(MIP-1
), can promote inflammatory responses. Our studies evaluated contributions of NK cells to early
MCMV-induced liver inflammation and MIP-1
requirements for inflammation and delivery
of antiviral defenses. NK cells were shown to be responsible for focal inflammation, and to be induced to migrate at high levels, in MCMV-infected livers. MIP-1
gene expression was elevated at coinciding times, and mice deficient in MIP-1
function were dramatically inhibited
in both inflammatory and protective liver responses. The results precisely define MIP-1
-dependent steps required to achieve NK cell inflammation during, and mechanisms promoting defense against, viral infections in tissues.
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