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Abstract Title:

The protective effects of lactoferrin against murine norovirus infection through inhibition of both viral attachment and replication.

Abstract Source:

Biochem Biophys Res Commun. 2013 May 17 ;434(4):791-6. Epub 2013 Apr 17. PMID: 23603257

Abstract Author(s):

Hiroki Ishikawa, Naoki Awano, Toshie Fukui, Hiraku Sasaki, Shigeru Kyuwa

Article Affiliation:

Hiroki Ishikawa

Abstract:

The purpose of this study was to evaluate the effects of bovine lactoferrin against norovirus infection using mouse norovirus (MNV) and Raw264.7 cell in vitro. When Raw264.7 cells were infected with MNV in the presence or absence of lactoferrin, the cytotoxic damage to the infected Raw264.7 cells significantly and dose-dependently decreased and completely inhibited in the presence of 15 or 20μg/well of lactoferrin as compared with the absence of lactoferrin. Correspondingly, the MNV titers in the culture medium and intracellularly were significantly decreased in infected Raw264.7 cells treated with lactoferrin compared to control infected Raw264.7 cells. The mechanisms responsible forthe protective effects of lactoferrin against MNV infection were attributed to both its inhibition of the initial MNV attachment to cells and the subsequent interference with MNV replication. Moreover, it was revealed that lactoferrin could rapidly induce the expression of anti-viral cytokine mRNA,such as IFN-α and IFN-β which involved in inhibition of MNV replication in infected Raw264.7 cells, in the early phase of infection. It was concluded that lactoferrin exerts protective effects against MNV infection through inhibition of both viral attachment and replication. The present results provide evidence that lactoferrin may be useful as a preventive and/or therapeutic anti-norovirus agent.

Study Type : In Vitro Study

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