A Versatile Plant Rhabdovirus-Based Vector for Gene Silencing, miRNA Expression and Depletion, and Antibody Production.

A Versatile Plant Rhabdovirus-Based Vector for Gene Silencing, miRNA Expression and Depletion, and Antibody Production.
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一种基于植物弹状病毒的多功能载体,用于基因沉默、miRNA 表达和消除以及抗体生产

DOI:
10.3389/fpls.2020.627880
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发表时间:
2020
影响因子:
5.6
通讯作者:
Li Z
Li Z
中科院分区:
生物学2区
文献类型:
--
作者:
Peng X;Ma X;Lu S;Li Z

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植物病毒载体是将遗传物质递送至宿主细胞以进行功能基因组学研究和蛋白质过度表达的理想工具。尽管已经为不同的目的开发了大量的植物病毒载体,但是特定病毒载体的效用通常是有限的。在这里,我们报告了一种基于多用途植物弹状病毒的载体系统,适用于本塞姆氏烟草的广泛应用。我们通过表达靶基因的有义、反义或双链RNA,设计了基于荠菜黄网弹状病毒(SYNV)的基因沉默载体。使用表达设计的人工 microRNA 的 SYNV 载体还实现了稳健的靶基因沉默。此外,使用 SYNV 载体异位表达短串联靶模拟 RNA 会导致靶标 miR165/166 显着缺失,并导致叶片发育异常。更重要的是,SYNV 能够容纳两个表达盒,允许同时进行 RNA 沉默和大报告基因的过度表达。这种双容量载体还能够系统表达由轻链和重链组成的全分子单克隆抗体。这些结果突出了SYNV载体系统在基因功能研究和农业生物技术中的实用性,并为开发其他经济上重要的植物弹状病毒的类似载体提供了技术模板。
Plant virus vectors are ideal tools for delivery of genetic cargo into host cells for functional genomics studies and protein overexpression. Although a vast number of plant virus vectors have been developed for different purposes, the utility of a particular virus vector is generally limited. Here, we report a multipurpose plant rhabdovirus-based vector system suitable for a wide range of applications in Nicotiana benthamiana. We engineered sonchus yellow net rhabdovirus (SYNV)-based gene silencing vectors through expressing a sense, antisense, or double-stranded RNAs of target genes. Robust target gene silencing was also achieved with an SYNV vector expressing a designed artificial microRNA. In addition, ectopic expression of a short tandem target mimic RNA using the SYNV vector led to a significant depletion of the target miR165/166 and caused abnormal leaf development. More importantly, SYNV was able to harbor two expression cassettes that permitted simultaneous RNA silencing and overexpression of large reporter gene. This dual capacity vector also enabled systemic expression of a whole-molecule monoclonal antibody consisting of light and heavy chains. These results highlight the utility of the SYNV vector system in gene function studies and agricultural biotechnology and provide a technical template for developing similar vectors of other economically important plant rhabdoviruses.
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