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Putative RNA viral sequences detected in an Ixodes scapularis-derived cell line


Ticks Tick Borne Dis._v.8_p.103–111.pdf1.9 MBPDF見る/開く

タイトル: Putative RNA viral sequences detected in an Ixodes scapularis-derived cell line
著者: Nakao, Ryo 著作を一覧する
Matsuno, Keita 著作を一覧する
Qiu, Yongjin 著作を一覧する
Marilyama, Junki 著作を一覧する
Eguchi, Nao 著作を一覧する
Nao, Naganori 著作を一覧する
Kajihara, Masahiro 著作を一覧する
Yoshii, Kentaro 著作を一覧する
Sawa, Hirofumi 著作を一覧する
Takada, Ayato 著作を一覧する
Sugimoto, Chihiro 著作を一覧する
キーワード: Bunyavirus
Ixodes scapularis
Ixodes scapularis-associated virus-1
発行日: 2018年 1月22日
出版者: Elsevier
誌名: Ticks and Tick-Borne Diseases
巻: 8
号: 1
開始ページ: 103
終了ページ: 111
出版社 DOI: 10.1016/j.ttbdis.2016.10.005
抄録: Ticks harbour various microorganisms, some of which act as pathogens of humans and animals. The recent advancement of genome sequencing technologies revealed that a wide range of previously unrecognised microorganisms exist in ticks. Continuous cell lines established from ticks could play a key role in the isolation of such microorganisms; however, tick cells themselves have been known to harbour symbiotic microorganisms. The present study aimed to characterise putative RNA viral sequences detected in the culture supernatant of one of the most frequently used tick cell lines, ISE6, which was derived from embryos of the blacklegged tick Ixodes scapularis. Viral particles purified from the culture supernatant were used for RNA extraction, followed by Illumina sequencing. The reads were de novo assembled and the resulting contigs were annotated by tBLASTx search. The results suggested that there were at least five putative viral sequences of four phylogenetically distinct lineages in ISE6 cells. The predominant viral sequence found in ISE6 cells, designated L scapularis iflavirus, was a member of the family Iflaviridae, which is an arthropod-infecting virus group. We also identified L and M segments of the family Bunyaviridae, which could not be classified into any of the five known genera, and a potential capsid protein related to Drosophila A virus. In addition to these previously unrecognised viruses, ISE6 was revealed to harbour a putative genome sequence of L scapularis-associated virus-1, which was reported in a recent metagenomic study of L scapularis itself. All the five putative viral sequences were detected by RT-PCR in both ISE6 cells and the culture supernatant. Electron microscopic analysis showed the existence of spherical virions with a varying diameter of 50-70 nm in the culture supernatant of ISE6 cells. Further studies are required to investigate the potential roles of ISE6-associated viruses in ticks. (C) 2017 Elsevier GmbH. All rights reserved.
Rights: ©2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 中尾 亮


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