Phosphorylated Codonopsis pilosula polysaccharide could inhibit the virulence of duck hepatitis A virus compared with Codonopsis pilosula polysaccharide.

Abstract:

:To screen effective anti-duck hepatitis A virus (DHAV) drugs, we applied STMP-STPP method to prepare phosphorylated Codonopsis pilosula polysaccharide (pCPPS), the phosphorylation-modified product of Codonopsis pilosula polysaccharide (CPPS). The IR spectrum and field emission scanning electron microscope (FE-SEM) were subsequently used to analyze the structure of pCPPS. Several tests were conducted to compare the anti-DHAV activities of CPPS and pCPPS. The MTT method was used to compare the effect of the drugs on DHAV-infected duck embryonic hepatocytes (DEHs), and the Reed-Muench assay was employed to observe changes in the virulence of DHAV. We also applied real-time PCR to examine the relationship between virus replication and the expression of IFN-β. The results indicated that CPPS could not inhibit the replication of DHAV. In contrast, pCPPS increased the virus TCID50, inhibited viral replication and, accordingly, increased the survival rate of DEHs infected with DHAV. Because DHAV induced the expression of IFN-β, and the IFN-β expression level was positively associated with the number of DHAV, the reduction of IFN-β expression levels after pCPPS treatment demonstrated a decrease in the number of virus particles. These results indicated that pCPPS, which reduces the number of DHAV, was more effective than CPPS in anti-DHAV activity.

journal_name

Int J Biol Macromol

authors

Ming K,Chen Y,Yao F,Shi J,Yang J,Du H,Wang X,Wang Y,Liu J

doi

10.1016/j.ijbiomac.2016.10.002

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

28-35

issue

Pt A

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(16)30811-X

journal_volume

94

pub_type

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