数字农科院2.0

Engorgement of Rhipicephalus haemaphysaloides ticks blocked by silencing a protein inhibitor of apoptosis

文献类型： 外文期刊

作者： Mayinuer Tuerdi;Shanming Hu;Yanan Wang;Yongzhi Zhou;Jie Cao;Houshuang Zhang;Jinlin Zhou

作者机构：

关键词： IAP;Rhipicephalus haemaphysaloides;RNA interference;Salivary glands

期刊名称： Experimental and Applied Acarology

ISSN： 0168-8162

年卷期： 2021 年 84.0 卷 3.0 期

页码：

收录情况： JCR（2021版）

摘要： Inhibitors of apoptosis (IAPs) are regulators of cell death and may play a role in the salivary glands of ticks during blood-feeding. We cloned the open reading frame (ORF) sequence of the IAP gene in Rhipicephalus haemaphysaloides (RhIAP). The RhIAP ORF of 1887 bp encodes a predicted protein of 607 amino acids, which contains three baculovirus IAP repeat domains and a RING finger motif. A real-time PCR assay showed that RhIAP mRNA was expressed in all the tick developmental stages (eggs, larvae, nymphs, and adults) and in all tissues examined (midgut, ovary, salivary glands, fat body, and hemolymph). Western blot showed that the protein level of RhIAP in salivary glands increased during tick blood-feeding and decreased towards the end of tick engorgement. RhIAP gene silencing in vitro experiments with salivary glands demonstrated that RhIAP could be effectively knocked down within 48 h after dsRNA treatment, and as a consequence, salivary glands displayed apoptotic morphology. RhIAP gene silencing also inhibited tick blood-feeding and decreased the engorgement rate. These data suggest that RhIAP might be a suitable RNAi target for tick control.

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