数字农科院2.0

The TCTP is essential for ovarian development and oviposition of Rhipicephalus haemaphysaloides

文献类型： 外文期刊

作者： Meng Sun;Fei Wu;Zhengmao Xu;Yanan Wang;Jie Cao;Yongzhi Zhou;Jinlin Zhou;Houshuang Zhang;Qianming Xu

作者机构：

关键词： Ferritin;Reproductive development;Rhipicephalus haemaphysaloides;RNA interference (RNAi);Translationally controlled tumour protein (TCTP);Vitellogenin

期刊名称： Veterinary Parasitology

ISSN： 0304-4017

年卷期： 2024 年 329 卷

页码：

收录情况： SCIE（2024版）

摘要： Tick infestations transmit various infectious agents and result in significant socioeconomic consequences. Currently, the primary focus of tick control efforts is identifying potential targets for immune intervention. In a previous study, we identified a highly conserved protein abundant in tick haemolymph extracellular vesicles (EVs) known as translationally controlled tumour protein (TCTP). We have found that native TCTP is present in various tissues of the Rhipicephalus haemaphysaloides tick, including salivary glands, midgut, ovary, and fat body. Notably, TCTP is particularly abundant in the tick ovary and its levels increase progressively from the blood-feeding stage to engorgement. When the TCTP gene was knocked down by RNAi, there was a noticeable delay in ovarian development, and the reproductive performance, in terms of egg quantity and survival, was also hindered. Our investigations have revealed that the observed effects in ovary and eggs in dsRNA-treated ticks are not attributable to cell death mechanisms like apoptosis and autophagy but rather to the reduction in the expression of vitellogenin (Vg1, Vg2, and Vg3) and ferritin (ferritin 1 and ferritin 2) proteins crucial for ovarian development and embryo survival in ticks. Additionally, phylogenetic analysis and structural comparisons of RhTCTP and its orthologues across various tick species, vertebrate hosts, and humans have shown that TCTP is conserved in ticks but differs significantly between ticks and their hosts, particularly in the TCTP_1 and TCTP_2 domains. Overall, TCTP plays a vital role in tick reproductive development and presents itself as a potential target for tick control in both humans and animals.

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