Abstract:
:Influenza A virus pandemics and emerging antiviral resistance highlight the urgent need for novel generic pharmacological strategies that reduce both viral replication and inflammation of the lung. We have previously investigated the therapeutic efficacy of recombinant human catalase (rhCAT) against viral pneumonia in mice, but the protection mechanisms involved were not explored. In the present study, we have performed a more in-depth analysis covering survival, lung inflammation, immune cell responses, production of cytokines, and inflammation signaling pathways in mice. Male imprinting control region mice were infected intranasally with high pathogenicity (H1N1) influenza A virus followed by treatment with recombinant human catalase. The administration of rhCAT resulted in a significant reduction in inflammatory cell infiltration (e.g., macrophages and neutrophils), inflammatory cytokine levels (e.g., IL-2, IL-6, TNF-α, IFN-γ), the level of the intercellular adhesion molecule 1 chemokine and the mRNA levels of toll-like receptors TLR-4, TLR-7, and NF-κB, as well as partially maintaining the activity of the antioxidant enzymes system. These findings indicated that rhCAT might play a key protective role in viral pneumonia of mice via suppression of inflammatory immune responses.
journal_name
Inflammationjournal_title
Inflammationauthors
Shi X,Shi Z,Huang H,Zhu H,Zhou P,Zhu H,Ju Ddoi
10.1007/s10753-013-9800-2subject
Has Abstractpub_date
2014-06-01 00:00:00pages
809-17issue
3eissn
0360-3997issn
1573-2576journal_volume
37pub_type
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