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J. Virol., Dec 1997, 9223-9230, Vol 71, No. 12
JW Ding, Q Ning, MF Liu, A Lai, J Leibowitz, KM Peltekian, EH Cole, LS Fung, C Holloway, PA Marsden, H Yeger, MJ Phillips and GA Levy
Activation of the immune coagulation system has been implicated in the
pathogenesis of fulminant liver failure caused by murine hepatitis virus
strain 3 (MHV-3). The recent discovery of the fgl2 gene, which encodes for
MHV-3-induced prothrombinase (fgl2 prothrombinase), allows for fundamental
studies to determine the molecular basis for fulminant liver failure.
Transcription of the fgl2 gene and translation of the protein it encodes
were examined in the liver and other organs of susceptible mice following
MHV-3 infection. No constitutive expression of the fgl2 gene or the fgl2
prothrombinase was detected. Within 12 to 24 h of MHV-3 infection, however,
fgl2 gene transcripts were detected in large amounts in the liver, spleen,
and lungs, all of which are rich in reticuloendothelial cells, but were
only focally present in small amounts in the kidney and brain. There was
sequential detection of fgl2 prothrombinase in the liver, where it was
localized specifically to the endothelium of intrahepatic veins and hepatic
sinusoids; this was allowed by fibrin deposition, which resulted in
confluent hepatocellular necrosis. These results provide further evidence
for the role of the selective expression of this novel fgl2 prothrombinase
in the pathogenesis of MHV-3-induced fulminant liver failure.
Copyright © 1997, American Society for Microbiology
Fulminant hepatic failure in murine hepatitis virus strain 3 infection: tissue-specific expression of a novel fgl2 prothrombinase
Multi-Organ Transplant Program and Department of Medicine, Toronto Hospital, Ontario, Canada.
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