Therapeutic impact of human serum albumin-thioredoxin fusion protein on influenza virus-induced lung injury mice

Ryota Tanaka, Yu Ishima, Yuki Enoki, Kazuhiko Kimachi, Tatsuya Shirai, Hiroshi Watanabe, Victor T.G. Chuang, Toru Maruyama, Masaki Otagiri

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Reactive oxygen species (ROS) are the primary pathogenic molecules produced in viral lung infections. We previously reported on the use of a recombinant human serum albumin (HSA)-thioredoxin 1 (Trx) fusion protein (HSA-Trx) for extending the half-life Trx, an endogenous protein with anti-oxidant properties. As a result, it was possible to overcome the unfavorable pharmacokinetic and short pharmacological properties of Trx. We hypothesized that HSA-Trx would attenuate the enhanced ROS production of species such as hydroxyl radicals by neutrophils during an influenza viral infection. The levels of 8-hydroxy-2'-deoxyguanosine and 3-nitrotyrosine were used as indices of the anti-oxidant activity of HSA-Trx. In addition, the cytoprotective effects of HSA-Trx were examined in PR8 (H1N1) influenza virus-induced lung injured mice. The findings show that HSA-Trx reduced the number of total cells, neutrophils, and total protein in BALF of influenza virus-induced lung injured mice. The HSA-Trx treatment significantly decreased the level of 8-hydroxy-2'-deoxyguanosine and 3-nitrotyrosine, but failed to inhibit inducible nitric oxide synthase expression, in the lungs of the virus-infected mice. On the other hand, Tamiflu® treatment also significantly suppressed the production of inflammatory cells and neutrophil infiltration, as well as the protein level in BALF and lung histopathological alterations caused by the influenza virus. The suppressive effect of Tamiflu® was slightly stronger than that of HSA-Trx. Interestingly, Tamiflu® significantly decreased virus proliferation, while HSA-Trx had no effect. These results indicate that HSA-Trx may be of therapeutic value for the treatment of various acute inflammatory disorders such as influenza-virus-induced pneumonia, by inhibiting inflammatory-cell responses and suppressing the overproduction of NO in the lung.

本文言語English
論文番号561
ジャーナルFrontiers in Immunology
5
NOV
DOI
出版ステータスPublished - 2014
外部発表はい

ASJC Scopus subject areas

  • 免疫アレルギー学
  • 免疫学

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