Disruption of miRNA Sequence by TALENs and CRISPR/Cas9 Induces Varied Length of miRNA Production [CRISPR/Cas9]
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PROVIDER: PRJNA540493 | ENA |
REPOSITORIES: ENA
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Project description:Disruption of miRNA Sequence by TALENs and CRISPR/Cas9 Induces Varied Length of miRNA Production [TALENs]
| PRJNA534426 | ENA
Project description:Purpose: MicroRNAs (miRNAs) have been recognized as crucial players in plant growth, development, production and responses to biotic and abiotic stresses, while only limited number of mutants can be used to dissect their roles. Here we used TALENs (Transcription Activator-Like Effector Nucleases) and Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) to introduce base pair mutations in MIRNA genes, resulting in creation of miRNA mutants and elucidating the effect of mutations on the miRNA biogenesis in rice and Arabidopsis. Methods: Total RNAs were prepared using a Trizol reagent-based method. The plant materials were homogenized and reconstituted in Trizol solution. The solution in turn was extracted by chloroform. Isopropanol was used to precipitate the total RNA. The whole process was performed under RNase free environment. DEPC-treated water was used to dissolve RNA. The total RNA underwent miRNA isolation using Qiagen miRNA purification kit according to the manufacturer’s manual. Small RNA libraries were made using 5 µg total RNA with Illumina TruSeq Small RNA Library Prep Kit as described, and sequenced on the Illumina HiSeq 2500 platform.
2019-05-01 | GSE130510 | GEO
Project description:Purpose: MicroRNAs (miRNAs) have been recognized as crucial players in plant growth, development, production and responses to biotic and abiotic stresses, while only limited number of mutants can be used to dissect their roles. Here we used TALENs (Transcription Activator-Like Effector Nucleases) and Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) to introduce base pair mutations in MIRNA genes, resulting in creation of miRNA mutants and elucidating the effect of mutations on the miRNA biogenesis in rice and Arabidopsis. Methods: Total RNAs were prepared using a Trizol reagent-based method. The plant materials were homogenized and reconstituted in Trizol solution. The solution in turn was extracted by chloroform. Isopropanol was used to precipitate the total RNA. The whole process was performed under RNase free environment. DEPC-treated water was used to dissolve RNA. The total RNA underwent miRNA isolation using Qiagen miRNA purification kit according to the manufacturer’s manual. Small RNA libraries were made using 5 µg total RNA with NEBNext Small RNA library Prep Set, as described, and sequenced on the Illumina HiSeq 2500 platform.
2019-04-25 | GSE130239 | GEO
Project description:Genome-wide CRISPR-Cas9 knockout screen using TKOv1 sgRNA library was performed in isogenic RBM10-proficient and RBM10-deficient HCC827 cells.
2023-03-04 | E-MTAB-12724 | biostudies-arrayexpress
Project description:Identifying putative transcription factor target genes by combining CRISPR/Cas9-based transcriptional activation with RNAseq in Drosophila S2R+ cells. This study focuses on the transcription factors Twist and Snail, singly and together. RNA from Drosophila cells following CRISPR/Cas9-based activation of Twist, Snail, or Twist and Snail together, compared with non-targeting sgRNA. Two biological replicates for each experiment
2015-08-10 | E-GEOD-71430 | biostudies-arrayexpress
Project description:CRISPR-Cas9 delivery by AAV holds promise for gene therapy but faces critical barriers due to its potential immunogenicity and limited payload capacity. Here, we demonstrate genome engineering in postnatal mice using AAV-split-Cas9, a multi-functional platform customizable for genome-editing, transcriptional regulation, and other previously impracticable AAV-CRISPR-Cas9 applications. We identify crucial parameters that impact efficacy and clinical translation of our platform, including viral biodistribution, editing efficiencies in various organs, antigenicity, immunological reactions, and physiological outcomes. These results reveal that AAV-CRISPR-Cas9 evokes host responses with distinct cellular and molecular signatures, but unlike alternative delivery methods, does not induce detectable cellular damage in vivo. Our study provides a foundation for developing effective genome therapeutics mRNA-Seq from muscles (9 samples; 3 mice x 3 conditions) and lymph nodes (9 samples; 3 mice x 3 conditions).
2016-07-29 | E-GEOD-84534 | biostudies-arrayexpress
Project description:By a robust unbiased ChIP-seq approach, we demonstrated that CRISPR/Cas9 had crRNA-specific off-target binding activities in human genome. However, most of those binding off-targets could not be efficiently cleaved both in vivo and in vitro which suggested the cleavage off-target activity of CRISPR/Cas9 in human genome is very limited. We provided a valuable tool to further investigate the molecular mechanism of CRISPR/Cas9 and to optimize its in vivo targeting sgRNA binding sites were identified with ChipSeq by using GFP antibody (there are 2 replicates for egfa-t1 sgRNA,emx1 sgRNA and control without sgRNA in Hek293T cells, one egfa-t1 sgRNA,emx1 sgRNA and control without sgRNA in HeLaS3 cells)
2014-06-18 | E-GEOD-58511 | biostudies-arrayexpress
Project description:CRISPRs and TALENs are efficient systems for gene editing in many organisms including plants. In many cases the CRISPR-Cas or TALEN modules are expressed in the plant cell only transiently. Theoretically, transient expression of the editing modules should limit unexpected effects compared to stable transformation. However, very few studies have measured the off-target and unpredicted effects of editing strategies on the plant genome, and none of them have compared these two major editing systems. We conducted a comprehensive genome-wide investigation of off-target mutations using either a CRISPR-Cas9 or a TALEN strategy. We observed a similar number of SNVs and InDels for the two editing strategies compared to control non-transfected plants, with an average of 8.25 SNVs and 19.5 InDels for the CRISPR-edited plants, and an average of 17.5 SNVs and 32 InDels for the TALEN-edited plants. Interestingly, a comparable number of SNVs and InDels could be detected in the PEG-treated control plants. This shows that except for the on-target modifications, the gene editing tools used in this study did not show a significant off-target activity nor unpredicted effects on the genome, and that the PEG treatment in itself was probably the main source of mutations found in the edited plants.
2022-03-03 | E-MTAB-11497 | biostudies-arrayexpress
Project description:MicroRNAs (miRNAs) are 20-24 nucleotides (nt) small RNAs functioning in eukaryotes. The length and sequence of miRNAs are not only related to the biogenesis of miRNAs but are also important for downstream physiological processes like ta-siRNA production. To investigate these roles, it is informative to create small mutations within mature miRNA sequences. We used both TALENs (transcription activator-like effector nucleases) and clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) to introduce heritable base pair mutations in mature miRNA sequences. For rice, TALEN constructs were built targeting five different mature miRNA sequences and yielding heritable mutations. Among the resulting mutants, mir390 mutant showed a severe defect in the shoot apical meristem (SAM), a shootless phenotype, which could be rescued by the wild-type MIR390. Small RNA sequencing showed the two base pair deletion in mir390 substantially interfered with miR390 biogenesis. In Arabidopsis, CRISPR/Cas9-mediated editing of the miR160* strand confirmed that the asymmetric structure of miRNA is not a necessary determinant for secondary siRNA production. CRISPR/Cas9 with double-guide RNAs successfully generated mir160a null mutants with fragment deletions, at a higher efficiency than a single-guide RNA. The difference between the phenotypic severity of miR160a mutants in Col-0 versus Ler backgrounds highlights a diverged role for miR160a in different ecotypes. Overall, we demonstrated that TALENs and CRISPR/Cas9 are both effective in modifying miRNA precursor structure, disrupting miRNA processing and generating miRNA null mutant plants.
| S-EPMC7292542 | biostudies-literature
Project description:CRISPR/Cas9 genome editing demonstrates that CCM3 modulates endothelial miRNA expression
| PRJNA473162 | ENA