发布: 2020年05月05日第10卷第9期 DOI: 10.21769/BioProtoc.3598 浏览次数: 4195
评审: Alexandros AlexandratosAmit DeyOmar Akil
Abstract
Many RNA viruses are found in protozoan parasites. They can be responsible for more serious pathology or treatment failure. For the detection of viral double-stranded RNA (dsRNA), sequence-dependent and -independent methods are available, such as quantitative real-time PCR and immunofluorescence, dot blot, ELISA or sequencing. The technique presented here is sequence-independent and is well detailed in the following protocol, taking the example of Leishmania RNA virus (LRV) in Leishmania guyanensis (Lgy) species. To summarise, the protocol is divided into four major steps: RNA extraction from the parasites, RNA purification, enzymatic digestions with DNase I and Nuclease S1, and visualization by gel electrophoresis. This method can be used to detect other viral dsRNA in other parasites. It provides an additional tool, complementary to other techniques previously cited and it is easy and quite fast to achieve.
Keywords: dsRNA (dsRNA)Background
The wide diversity of RNA viruses present in protozoan parasites has been well documented (Wang and Wang, 1991; Ghosh et al., 2012; Zangger et al., 2014; Lye et al., 2016; Akopyants et al., 2016; Fernandez-Presas et al., 2017; Grybchuk et al., 2018). Moreover, these viruses have been described as potential virulence factors (Fichorova et al., 2013; El-Gayar et al., 2016; Rath et al., 2019). Of particular note, the presence of the endosymbiont Leishmania RNA virus (LRV), a Totiviridae double-stranded RNA (dsRNA) virus, in Leishmania guyanensis (Lgy) exacerbates leishmaniasis disease (Ives et al., 2011; Rossi et al., 2017), favors metastasis by inducing interleukin-17 (Hartley et al., 2016) and also increases the risk of treatment failure (Adaui et al., 2016; Bourreau et al., 2016; Vieira-Gonçalves et al., 2019). This shows the importance of viral dsRNA detection in parasites. The technique presented here is sequence-independent, in comparison to quantitative real-time PCR, so it can be applied widely to RNA viruses. This dsRNA detection protocol can also, and is recommended, to be used to confirm (or be confirmed with) other methods of detection that are sequence-independent or -dependent, as for example dot blot or PCR (Zangger et al., 2013). The technique is presented here with LRV, however its application is possible for other RNA viruses and in other parasites (Grybchuk et al., 2018).
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文章信息
版权信息
© 2020 The Authors; exclusive licensee Bio-protocol LLC.
如何引用
Isorce, N. and Fasel, N. (2020). Viral Double-Stranded RNA Detection by DNase I and Nuclease S1 digestions in Leishmania parasites. Bio-protocol 10(9): e3598. DOI: 10.21769/BioProtoc.3598.
分类
微生物学 > 病原体检测 > PCR
微生物学 > 微生物生物化学 > RNA
分子生物学 > RNA > RNA 检测
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