scholarly journals Correction: Germline-Transmitted Genome Editing in Arabidopsis thaliana Using TAL-Effector-Nucleases

PLoS ONE ◽  
2015 ◽  
Vol 10 (7) ◽  
pp. e0133945
Author(s):  
Joachim Forner ◽  
Anne Pfeiffer ◽  
Tobias Langenecker ◽  
Pablo A. Manavella ◽  
Jan U. Lohmann
PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0121056 ◽  
Author(s):  
Joachim Forner ◽  
Anne Pfeiffer ◽  
Tobias Langenecker ◽  
Pablo Manavella ◽  
Jan U. Lohmann

2021 ◽  
Vol 28 (2) ◽  
pp. 8
Author(s):  
Gunda Petraitytė ◽  
Eglė Preikšaitienė ◽  
Violeta Mikštienė

Studies which seek fundamental, thorough knowledge of biological processes, and continuous advancement in natural sciences and biotechnology enable the establishment of molecular strategies and tools to treat disorders caused by genetic mutations. Over the years biological therapy evolved from using stem cells and viral vectors to RNA therapy and testing different genome editing tools as promising gene therapy agents. These genome editing technologies (Zinc finger nucleases, TAL effector nucleases), specifically CRISPR-Cas system, revolutionized the field of genetic engineering and is widely applied to create cell and animal models for various hereditary, infectious human diseases and cancer, to analyze and understand the molecular and cellular base of pathogenesis, to find potential drug/treatment targets, to eliminate pathogenic DNA changes in various medical conditions and to create future “precise medication”. Although different concerning factors, such as precise system delivery to the target cells, efficacy and accuracy of editing process, different approaches of making the DNA changes as well as worrying bioethical issues remain, the importance of genome editing technologies in medicine is undeniable. The future of innovative genome editing approach and strategies to treat diseases is complicated but interesting and exciting at once for all related parties – researchers, clinicians, and patients.


2013 ◽  
Vol 13 (4) ◽  
pp. 291-303 ◽  
Author(s):  
Andrew Scharenberg ◽  
Philippe Duchateau ◽  
Julianne Smith

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Tomoji Mashimo ◽  
Takehito Kaneko ◽  
Tetsushi Sakuma ◽  
Junya Kobayashi ◽  
Yayoi Kunihiro ◽  
...  

2021 ◽  
Author(s):  
Francesca B Lopez ◽  
Antoine Fort ◽  
Luca Tadini ◽  
Aline V Probst ◽  
Marcus McHale ◽  
...  

Abstract The 45S rRNA genes (rDNA) are amongst the largest repetitive elements in eukaryotic genomes. rDNA consists of tandem arrays of rRNA genes, many of which are transcriptionally silenced. Silent rDNA repeats may act as ‘back-up’ copies for ribosome biogenesis and have nuclear organization roles. Through Cas9-mediated genome editing in the Arabidopsis thaliana female gametophyte we reduced 45S rDNA copy number to a plateau of ∼10%. Two independent lines had rDNA copy numbers reduced by up to 90% at the T7 generation, named Low Copy Number (LCN) lines. Despite drastic reduction of rDNA copies, rRNA transcriptional rates and steady-state levels remained the same as wild type plants. Gene dosage compensation of rRNA transcript levels was associated with reduction of silencing histone marks at rDNA loci and altered Nucleolar Organiser Region 2 organization. While overall genome integrity of LCN lines appears unaffected, a chromosome segmental duplication occurred in one of the lines. Transcriptome analysis of LCN seedlings identified several shared dysregulated genes and pathways in both independent lines. Cas9 genome editing of rRNA repeats to generate LCN lines provides a powerful technique to elucidate rDNA dosage compensation mechanisms and impacts of low rDNA copy number on genome stability, development, and cellular processes.


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