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2006 ; 168
(4
): 1169-78; quiz 1404-5
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Kupffer cell-dependent hepatitis occurs during influenza infection
#MMPMID16565492
Polakos NK
; Cornejo JC
; Murray DA
; Wright KO
; Treanor JJ
; Crispe IN
; Topham DJ
; Pierce RH
Am J Pathol
2006[Apr]; 168
(4
): 1169-78; quiz 1404-5
PMID16565492
show ga
Respiratory infections, including influenza in humans, are often accompanied by a
hepatitis that is usually mild and self-limiting. The mechanism of this kind of
liver damage is not well understood. In the present study, we show that
influenza-associated hepatitis occurs due to the formation of inflammatory foci
that include apoptotic hepatocytes, antigen-specific CD8(+) T cells, and Kupffer
cells. Serum aminotransaminase levels were elevated, and both the histological
and serum enzyme markers of hepatitis were increased in secondary influenza
infection, consistent with a primary role for antigen-specific T cells in the
pathogenesis. No virus could be detected in the liver, making this a pure example
of "collateral damage" of the liver. Notably, removal of the Kupffer cells
prevented the hepatitis. Such hepatic collateral damage may be a general
consequence of expanding CD8(+) T-cell populations during many extrahepatic viral
infections, yielding important implications for liver pathobiology.