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ABSTRACT: RNA extraction from wild-caught asian longhorned tick

PROVIDER: PRJNA650018 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12375042_1.fastq.gz	Fastqsanger.gz
	SRR12375042_2.fastq.gz	Fastqsanger.gz
	SRR12375043_1.fastq.gz	Fastqsanger.gz
	SRR12375043_2.fastq.gz	Fastqsanger.gz
	SRR12375044_1.fastq.gz	Fastqsanger.gz

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Antiviral RNA interference in disease vector (Asian longhorned) ticks

Project description:Tick-borne diseases (TBDs) are the most common illnesses transmitted by ticks, and the annual number of reported TBD cases continues to increase. The Asian longhorned tick, a vector associated with at least 30 human pathogens, is native to eastern Asia and recently reached the USA as an emerging disease threat. Newly identified tick-transmitted pathogens continue to be reported, raising concerns about how TBDs occur. Interestingly, tick can harbor pathogens without being affected themselves. For viral infections, ticks have their own immune systems that protect them from infection. Meanwhile, tick-borne viruses have evolved to avoid these defenses as they establish themselves within the vector. Here, we show in detail that infecting longhorned ticks with distinct arthropod-borne RNA viruses through two approaches natural blood feeding and injection, all induce the production of vsiRNAs. Dicer2-like homolog plays a role in regulating antiviral RNAi responses as knocking down of this gene enhanced viral replication. Furthermore, we demonstrate that tick antiviral RNAi responses are inhibited through expression heterologous VSR proteins in recombinant SINV. We identify both the virus and tick factors are critical components to understanding TBDs. Importantly, our study introduces a novel, in vivo virus-vector-mouse model system for exploring TBDs in the future.

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Project description:Background: Aquaculture of the black tiger prawn Penaeus monodon remains severely constrained by an almost total dependence on wild-caught broodstock. Reliance on wild-caught broodstock stems, for the most part, from reduced reproductive potential of captive-reared females. Reproductive performance of captive-reared females is usually characterised by longer latency period, lower egg production, egg hatch rates and post-larval survivorship compared with their wild-caught counterparts. Improved understanding of the cellular and associated molecular events occurring during peneaid ovarian maturation could therefore be fundamental to improving reproductive success of captive-reared animals. Methodology/Principle Findings: In support of other studies, our histological analyses of developing oocytes revealed differences between wild-caught and captive-reared P. monodon, including reduced lipid accumulation in oocytes of captive-reared animals. We have employed oligonucleotide microarray analysis to compare expression profiles of genes involved in ovarian maturation among wild-caught and captive-reared animals. Custom oligonucleotide microarrays were constructed and screened with transcripts derived from the ovary, cephalothorax and eyestalk from animals of all ovarian maturation stages. Ovarian maturation-related differential expression patterns were observed for 111 transcripts, with 53 transcripts displaying differential expression between wild-caught and captive-reared animals. Notably transcripts encoding vitellogenin - the major egg yolk protein precursor, and a lipid storage droplet protein (which we named pmLSD) which is involved in lipid accumulation, were found to be more highly expressed in wild-caught animals. pmLSD transcripts localise to pre-vitellogenic oocytes of wild-caught animals and the pmLSD protein is exclusively localised to the surface of lipid droplets of oocytes at vitellogenic and cortical rod stages.

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