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In vitro anti-influenza virus activities of sulfated polysaccharide fractions from Gracilaria lemaneiformis

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Virologica Sinica

Abstract

In this paper, in vitro anti-influenza virus activities of sulfated polysaccharide fractions from Gracilaria lemaneiformis were investigated. Cytotoxicities and antiviral activities of Gracilaria lemaneiformis polysaccharides (PGL), Gracilaria lemaneiformis polysaccharide fraction-1 (GL-1), Gracilaria lemaneiformis polysaccharide fraction-2 (GL-2) and Gracilaria lemaneiformis polysaccharide fraction-3 (GL-3) were studied by the Methyl thiazolyl tetrazolium (MTT) method, and the inhibitory effect against Human influenza virus H1-364 induced cytopathic effect (CPE) on MDCK cells were observed by the CPE method. In addition, the antiviral mechanism of PGL was explored by Plaque forming unit (PFU), MTT and CPE methods. The results showed: i) Cytotoxicities were not significantly revealed, and H1-364 induced CPE was also reduced treated with sulfated polysaccharide fractions from Gracilaria lemaneiformis; ii) Antiviral activities were associated with the mass percentage content of sulfate groups in polysaccharide fractions, which was about 13%, in polysaccharides (PGL and GL-2) both of which exhibited higher antiviral activity; iii) A potential antiviral mechanism to explain these observations is that viral adsorption and replication on host cells were inhibited by sulfated polysaccharides from Gracilaria lemaneiformis. In conclusion, Anti-influenza virus activities of sulfated polysaccharide fractions from Gracilaria lemaneiformis were revealed, and the antiviral activities were associated with content of sulfate groups in polysaccharide fractions.

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Authors and Affiliations

  1. Department of Biology of Shantou University, Shantou, 515063, China

    Mei-zhen Chen, Hao-gui Xie, La-wei Yang, Zao-hui Liao & Jie Yu

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  1. Mei-zhen Chen
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  2. Hao-gui Xie
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  3. La-wei Yang
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  4. Zao-hui Liao
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  5. Jie Yu
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Correspondence to Mei-zhen Chen.

Additional information

Foundation items: The Science and Technology Projects of Guangdong (2009B020312012); The Science and Technology Projects of Shantou (2008-143).

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Chen, Mz., Xie, Hg., Yang, Lw. et al. In vitro anti-influenza virus activities of sulfated polysaccharide fractions from Gracilaria lemaneiformis . Virol. Sin. 25, 341–351 (2010). https://doi.org/10.1007/s12250-010-3137-x

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  • DOI: https://doi.org/10.1007/s12250-010-3137-x

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