CRISPR/Cas9-mediated genome editing induces gene knockdown by altering the pre-mRNA splicing in mice.

BMC Biotechnol

State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.

Published: October 2018

AI Article Synopsis

  • Scientists have been using a tool called CRISPR/Cas9 to change genes in living things, like mice, but there hasn't been much research on what happens to the genes after they're changed.
  • This study found that using CRISPR can also create models that lower gene activity by messing with the parts of the gene that help make proteins, leading to different versions of the mRNA.
  • The researchers learned that this unexpected result of changing genes could help in creating new ways to study genes and how they work.

Article Abstract

Background: Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR associated protein 9 (CRISPR/Cas9) has been wildly used to generate gene knockout models through inducing indels causing frame-shift. However, there are few studies concerning the post-transcript effects caused by CRISPR-mediated genome editing.

Results: In the present study, we showed that gene knockdown model also could be generated using CRISPR-mediated gene editing by disrupting the boundary of exon and intron in mice (C57BL/6 J). CRISPR induced indel at the boundary of exon and intron (5' splice site) caused alternative splicing and produced multiple different mRNAs, most of these mRNAs introduced premature termination codon causing down expression of the gene.

Conclusions: These results showed that alternative splicing mutants were able to generate through CRISPR-mediated genome editing by deleting the boundary of exon and intron causing disruption of 5' splice site. Although alternative splicing was an unexpected outcome, this finding could be developed as a technology to generate gene knockdown models or to investigate pre-mRNA splicing.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6171314PMC
http://dx.doi.org/10.1186/s12896-018-0472-8DOI Listing

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