Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome
Gene editing of the mitochondrial genome using the CRISPR-Cas9 system is highly challenging mainly due to sub-efficient delivery of guide RNA and Cas9 enzyme complexes into the mitochondria. In this study, we were able to perform gene editing in the mitochondrial DNA by appending an NADH-ubiquinone...
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2021-04-01
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doaj-886fb15f6ef748c58834c5883e7c178f2021-04-06T05:15:12ZengFrontiers Media S.A.Frontiers in Genetics1664-80212021-04-011210.3389/fgene.2021.627050627050Adapting CRISPR/Cas9 System for Targeting Mitochondrial GenomeSyed-Rehan A. Hussain0Syed-Rehan A. Hussain1Mehmet E. Yalvac2Benedict Khoo3Sigrid Eckardt4K. John McLaughlin5Center for Molecular and Human Genetics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United StatesCenter for Clinical and Translational Research, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United StatesDepartment of Neurology, The Ohio State University Wexner Medical Center, Columbus, OH, United StatesCenter for Molecular and Human Genetics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United StatesCenter for Molecular and Human Genetics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United StatesCenter for Molecular and Human Genetics, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, United StatesGene editing of the mitochondrial genome using the CRISPR-Cas9 system is highly challenging mainly due to sub-efficient delivery of guide RNA and Cas9 enzyme complexes into the mitochondria. In this study, we were able to perform gene editing in the mitochondrial DNA by appending an NADH-ubiquinone oxidoreductase chain 4 (ND4) targeting guide RNA to an RNA transport-derived stem loop element (RP-loop) and expressing the Cas9 enzyme with a preceding mitochondrial localization sequence. We observe mitochondrial colocalization of RP-loop gRNA and a marked reduction of ND4 expression in the cells carrying a 11205G variant in their ND4 sequence coincidently decreasing the mtDNA levels. This proof-of-concept study suggests that a stem-loop element added sgRNA can be transported to the mitochondria and functionally interact with Cas9 to mediate sequence-specific mtDNA cleavage. Using this novel approach to target the mtDNA, our results provide further evidence that CRISPR-Cas9-mediated gene editing might potentially be used to treat mitochondrial-related diseases.https://www.frontiersin.org/articles/10.3389/fgene.2021.627050/fullmitochondriaheteroplasmic mutationsPNPaseRP-loopchimeric guide RNA |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Syed-Rehan A. Hussain Syed-Rehan A. Hussain Mehmet E. Yalvac Benedict Khoo Sigrid Eckardt K. John McLaughlin |
spellingShingle |
Syed-Rehan A. Hussain Syed-Rehan A. Hussain Mehmet E. Yalvac Benedict Khoo Sigrid Eckardt K. John McLaughlin Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome Frontiers in Genetics mitochondria heteroplasmic mutations PNPase RP-loop chimeric guide RNA |
author_facet |
Syed-Rehan A. Hussain Syed-Rehan A. Hussain Mehmet E. Yalvac Benedict Khoo Sigrid Eckardt K. John McLaughlin |
author_sort |
Syed-Rehan A. Hussain |
title |
Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome |
title_short |
Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome |
title_full |
Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome |
title_fullStr |
Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome |
title_full_unstemmed |
Adapting CRISPR/Cas9 System for Targeting Mitochondrial Genome |
title_sort |
adapting crispr/cas9 system for targeting mitochondrial genome |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Genetics |
issn |
1664-8021 |
publishDate |
2021-04-01 |
description |
Gene editing of the mitochondrial genome using the CRISPR-Cas9 system is highly challenging mainly due to sub-efficient delivery of guide RNA and Cas9 enzyme complexes into the mitochondria. In this study, we were able to perform gene editing in the mitochondrial DNA by appending an NADH-ubiquinone oxidoreductase chain 4 (ND4) targeting guide RNA to an RNA transport-derived stem loop element (RP-loop) and expressing the Cas9 enzyme with a preceding mitochondrial localization sequence. We observe mitochondrial colocalization of RP-loop gRNA and a marked reduction of ND4 expression in the cells carrying a 11205G variant in their ND4 sequence coincidently decreasing the mtDNA levels. This proof-of-concept study suggests that a stem-loop element added sgRNA can be transported to the mitochondria and functionally interact with Cas9 to mediate sequence-specific mtDNA cleavage. Using this novel approach to target the mtDNA, our results provide further evidence that CRISPR-Cas9-mediated gene editing might potentially be used to treat mitochondrial-related diseases. |
topic |
mitochondria heteroplasmic mutations PNPase RP-loop chimeric guide RNA |
url |
https://www.frontiersin.org/articles/10.3389/fgene.2021.627050/full |
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