Pregnancy-associated decrease of Sia alpha 2-3Gal-linked glycans on salivary glycoproteins affects their binding ability to avian influenza virus

文献类型： 外文期刊

第一作者： Ding, Li

作者： Ding, Li;Fu, Xinle;Chen, Xiangqin;Zhang, Kun;Zhu, Guang;Yang, Fuying;Yu, Hanjie;Chen, Zhuo;Wang, Xilong;Li, Zheng;Guo, Wei;Cheng, Yimin;Wang, Xiurong;Wang, Xiaohong

作者机构：

关键词： Pregnant women; Salivary glycoprotein; Avian influenza virus (AIV)

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

ISSN： 0141-8130

年卷期： 2021 年 184 卷

页码：

收录情况： SCI

摘要： Salivary glycoproteins are known as an important barrier to inhibit influenza infection by presenting sialic acid (Sia) ligands that can bind with viral hemagglutination. Here, to further understand why pregnant women are more vulnerable to avian influenza virus (AIV), we investigated the alteration of protein sialylation in the saliva of women during pregnancy and postpartum, and its impact on the saliva binding affinity to AIV. Totally 1200 saliva samples were collected, the expression levels of terminal alpha 2-3/6-linked Sia on salivary proteins were tested and validated, and the binding activities of salivary proteins were assessed against 3 strains of AIV and the H1N1 vaccine. Result showed that the expression of terminal alpha 2-3-linked Sia in the saliva of women decreased dramatically during pregnancy compared to that of non-pregnancy control, especially for women in the second or third trimester (fold change = 0.53 and 0.37, p < 0.001). And their salivary protein binding ability to AIV declined accordingly. The variation of terminal alpha 2-3-linked Sia on salivary MUC5B and IgA was consistent with the above results. This study indicates that the decrease of terminal alpha 2-3-linked Sia on salivary glycoproteins of pregnant women affects their binding ability to AIV, which may provide new insights into AIV prevention and control.

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