アクセス数 : ?
ダウンロード数 : ?
ID 74742
著者
Pan, Hai-Yan Division of Enzyme Chemistry, Institute for Enzyme Research, the University of Tokushima
矢野, 仁康 Division of Enzyme Chemistry, Institute for Enzyme Research, the University of Tokushima
木戸, 博 Division of Enzyme Chemistry, Institute for Enzyme Research, the University of Tokushima 徳島大学 教育研究者総覧 KAKEN研究者をさがす
キーワード
influenza A virus
Toll-like receptor
proteinase-activated receptor-2
cardiomyocyte
資料タイプ
学術雑誌論文
抄録
Severe influenza sometimes causes myocarditis. We recently found that influenza A virus (IAV) infection induces various cellular factors, such as proinflammatory cytokines IL-6, IL-1β and TNF-α, matrix metalloproteinases (MMPs) and ectopic trypsin in mice hearts and in H9c2 cardiomyocytes. The induction of these cellular factors in turn promotes viral replication, myocardial inflammation and cellular damage through their intracellular signal transductions in cooperation with the IAV-induced Toll-like receptors (TLRs) and proteinase-activated receptor-2 (PAR-2) signallings, although the precise nature of these interactions remain obscure. By using specific inhibitors of TLRs and PAR-2 signalings and trypsin inhibitor aprotinin, we analyzed the role of TLR signaling and PAR-2 signaling in the IAV-induced pathological changes in cardiomyocytes. Inhibitors of TLR7/8-Myeloid Differentiation factor 88-nuclear factor-B signaling and aprotinin effectively suppressed IAV-induced upregulation of proinflammatory cytokines, MMPs, trypsinogen and viral replication. Inhibitor of TLR3-Toll/interleukin-1 receptor domain-containing adaptor inducing interferons-dependent signaling predominantly suppressed the upregulation of interferon-β, a key intracellular host immune response factor. In contrast to the suppressive effect of trypsin inhibitor aprotinin on IAV replication, PAR-2 inhibitor FSY-NH2, induced marginal upregulation of trypsinogen and subsequent stimulation of IAV replication.
掲載誌名
The journal of medical investigation : JMI
ISSN
13431420
cat書誌ID
AA11166929
58
1-2
開始ページ
19
終了ページ
28
並び順
19
発行日
2011-02
備考
The journal of medical investigation : http://medical.med.tokushima-u.ac.jp/jmi/index.html
EDB ID
フルテキストファイル
言語
eng
部局
先端酵素学研究所