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Development of Technologies for Efficient In Vivo Prime Editing

高效体内 Prime 编辑技术的开发

基本信息

批准号：
10580008
负责人：
Pablo Perez-Pinera
金额：
$ 53.63万
依托单位：
UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN
依托单位国家：
美国
项目类别：
财政年份：
2021
资助国家：
美国
起止时间：
2021-04-01 至 2025-02-28
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10580008
关键词：
Amyotrophic Lateral Sclerosis Basic Science Biological Biotechnology CRISPR/Cas technology Carrying Capacities Cells Chromosomal translocation Clinical Research Clinical Trials Computational Biology Cultured Cells DNA DNA Double Strand Break DNA Sequence Data Development Elements Engineering Evaluation Experimental Designs Future Gene Delivery Genes Genome Genomic DNA Genomic approach Immune response Knowledge Machine Learning Mediating Methodology Methods Modification Mutation Nonsense Mutation Open Reading Frames Outcome Pathogenicity Peptide Signal Sequences Positioning Attribute Regulatory Element Research Research Personnel Role Site Site-Directed Mutagenesis Specificity System Technology Testing Therapeutic Time Tissues Trans-Splicing Variant adeno-associated viral vector base base editor biophysical techniques cell type computational suite delivery vehicle design experience experimental study flexibility gene therapy genome editing human disease immunogenic improved in vivo innovation insertion/deletion mutation intein miniaturize multidisciplinary novel nuclease particle postmitotic predictive modeling prevent prime editing prime editor promoter reconstitution response success technology development technology research and development tool

项目摘要

PROJECT SUMMARY Genome editing is revolutionizing biomedicine and biotechnology by enabling the precise modification of genomic DNA in living cells. While various genome-editing tools have been developed over the past decade, the CRISPR-Cas9 system has emerged as a particularly versatile and efficient technology for editing DNA. Nonetheless, limitations derived from its reliance on DNA double strand breaks (DSB), which can lead to unpredictable editing outcomes and even chromosomal translocations, could limit its applications. Base editors (BEs) and prime editors (PEs) are two novel classes of genome-editing tools capable of introducing precise single-base conversion in DNA without the requirement of a DSB. PEs, in particular, provide greater flexibility than BEs, owing to their ability to introduce any type of base conversion and even programable small insertions and deletions. This expanded set of capabilities compared to other technologies makes PEs a particularly promising platform for applications in biomedicine; however, the large size of PEs precludes their in vivo delivery by AAV, a promising and effective gene delivery vehicle that is currently under evaluation in multiple clinical trials. To overcome these obstacles, we have created a split-PE platform that is compatible with AAV delivery and have demonstrated the functionality of this approach in cultured cells. Despite this progress, there still remain several critical challenges, which we here propose to overcome in order to optimize this technology for effective and specific in vivo prime editing. To accomplish this objective, we have assembled a multidisciplinary team with collective expertise in genome editing (Dr. Perez-Pinera), AAV gene delivery (Dr. Gaj) and computational biology (Dr. Song). Our collaborative efforts will yield an integrated and comprehensive PE toolset that will blend strategies for target identification and editing optimization, with methods for reducing off-target effects and immune responses, thus priming this technology for future in vivo applications. Given that the flexibility of PEs has significantly expanded the number of actionable target sites that can be genetically modified, we anticipate that the integrated technologies we develop will have large, direct and long- lasting impact in biomedicine by enabling not only novel gene therapies, but also basic research. In particular, our technology will provide investigators with biological tools that are uniquely capable of introducing mutations within post-mitotic cells in vivo, which could be used to dissect functional elements or even determine the role of pathogenic mutations in a cell- and tissue-specific manner. The technologies created by this application will thus broadly impact biotechnology and biomedicine.

项目总结