Specific histamine binding activity of a new lipocalin from Hyalomma asiaticum (Ixodidae) and therapeutic effects on allergic asthma in mice

文献类型： 外文期刊

第一作者： Wang, Yanan

作者： Wang, Yanan;Zhou, Yongzhi;Cao, Jie;Zhang, Houshuang;Gong, Haiyan;Zhou, Jinlin;Li, Zhuang;Zhou, Jinlin

作者机构：

关键词： Lipocalin;Hyalomma asiaticum;Histamine binding;Allergic asthma in mice

期刊名称：PARASITES & VECTORS （ 影响因子：3.876； 五年影响因子：3.959 ）

ISSN： 1756-3305

年卷期： 2016 年 9 卷

页码：

收录情况： SCI

摘要： Background: Lipocalin proteins are secreted by tick salivary glands as an important strategy to interfere with the immune response of hosts. A large number of lipocalins are secreted, but the functions of most of these proteins are unclear. Here, we report a new lipocalin protein with particular histamine binding capacity, which was isolated from the salivary glands of the tick Hyalomma asiaticum. Methods: The full length cDNA of the Ha24 gene was obtained by RACE, and Ha24 gene was expressed in E. coli; after protein purification and mice immunizations, specific Polyclonal antibodies (PcAb) were created in response to the recombinant protein. Reverse transcription PCR (RT-PCR), Quantitative PCR (Q-PCR), indirect immunofluorescence antibody (IFA) assay and western blot were used to detect the existence of native Ha24 in ticks. To confirm the histamine-binding capacity of rHa24, a histamine-binding assay was completed in vitro (ELISA) and in vivo by inhibition of allergic asthma in mice. Results: Ha24 is coded by 681 bases, contains 227 amino acids, and has a molecular weight of 23.3 kDa. Abundant expression in the salivary glands of feeding ticks was confirmed by the identification of native Ha24 in ticks. The results of a histamine binding assay both in vitro and in vivo demonstrated that rHa24 binds specifically with histamine in a dose-dependent manner, and can provide relief from allergic asthma in mice. Conclusions: Ha24 is a new tick lipocalin with specific histamine binding activity that can provide relief from host inflammation response.

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