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J. Virol., Apr 1997, 3244-3249, Vol 71, No. 4
P Marianneau, A Cardona, L Edelman, V Deubel and P Despres
The severe outcome of the dengue (DEN) virus infection known as DEN
hemorrhagic fever-DEN shock syndrome (DHF-DSS) is, in some cases,
accompanied by liver injury. Councilman bodies observed in liver biopsies
of DHF-DSS cases may correspond to hepatocytes in apoptosis. We show here
that infection of the hepatoma cell line HepG2 with DEN type 1 virus
induced cell death typical of apoptosis late in the virus cycle. The
transcription factor NF-kappaB was activated concomitantly with viral
protein synthesis and thus before the appearance of apoptotic cells.
Inhibition of apoptosis was observed when DEN virus- infected cells were
treated with NF-kappaB decoys, indicating the involvement of this
transcription factor in induction of cell death. Thus, infected hepatocytes
appear to be subject to apoptosis in vitro, and this may be a key element
in the pathophysiology of hepatic failure associated with DHF-DSS.
Copyright © 1997, American Society for Microbiology
Dengue virus replication in human hepatoma cells activates NF-kappaB which in turn induces apoptotic cell death
Unite des Arbovirus et Virus des Fievres Hemorragiques, Institut Pasteur, Paris, France.
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