Journal
MOLECULAR IMMUNOLOGY
Volume 133, Issue -, Pages 63-66Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.molimm.2021.01.024
Keywords
CRISPR/Cas9; Porcine circovirus type 2; Replication; sgRNA
Categories
Funding
- Major Scientific and Technological Innovation Project [MSTIP 2019JZZY010720]
- Shandong Provincial Key Research and Development Program [SPKR&DP 2019GNC106151]
- National Key RD Program [2016YFD0500708]
- Shandong Province Modern Agricultural Industry Technology System [SDAIT-08-07]
- Shandong Province agricultural applications of major innovation projects [SD2019XM003, SD2019XM006]
- Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences [CXGC2016B14]
- Taishan Scholars Project
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The study successfully edited the PCV2 genome using the CRISPR/Cas9 system, suppressing its replication in cells; some sgRNAs efficiently edited the genome while others did not; these findings suggest that the CRISPR/Cas9 system may be a new approach in combating PCV2 infection in the future.
Porcine circovirus type 2 (PCV2), a ubiquitous pathogen that primary cause of postweaning multisystemic wasting syndrome (PMWS), had caused significant morbidity and mortality in swine populations with huge economic losses in the worldwide swine industry. Currently, looking for effective antiviral drugs for PCV2 infection remains an important works. In our study, CRISPR/Cas9 system was used to further detected the key sites of PCV2 replication. We designed 8 single guide RNAs (sgRNA) by targeting essential genes across the genome of PCV2. Western-blot(WB), Cell counting kit-8 for high-throughput sgRNA screening were applied to detect PCV2 replication levels. The results showed that Oc8, O13, O134, NQT and NPS sgRNAs can edit the PCV2 genome efficiently and inhibit PCV2 replication in PK-15 cell; H3 sgRNA cannot edit the PCV2 genome successfully; NAT sgRNA can edit the PCV2 genome efficiently to improve the PCV2 replication in PK-15 cell; O26 sgRNA can edit the PCV2 genome successfully but it is not known yet of its effect on PCV2 replication, besides the Cas9 expression had no effect on cell viability. These data suggest that CRISPR/Cas9 system targeting PCV2 essential genes may serve as a novel therapeutic agent against PCV2 infection in the future.
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