相关实验视频

Updated: May 24, 2025

Lentiviral Vector-mediated Gene Therapy of Hepatocytes Ex Vivo for Autologous Transplantation in Swine

Lentiviral Vector-mediated Gene Therapy of Hepatocytes Ex Vivo for Autologous Transplantation in Swine

Published on: November 4, 2018

一种差异化β-环球蛋白基因替代策略使用异质内子来恢复生理表达

Kirby A Wallace¹, Trevor L Gerstenberg², Craig L Ennis²

¹Graphite Bio, Inc., South San Francisco, CA 94080, USA; Kamau Therapeutics, Inc., South San Francisco, CA 94080, USA.

Molecular therapy : the journal of the American Society of Gene Therapy

|March 1, 2025

概括

研究人员开发了一种新的CRISPR-Cas9基因编辑策略,以取代血液干细胞中缺陷的β-环球蛋白 (HBB) 基因. 这种方法成功地恢复了状细胞病和β-血病模型中的正常血红蛋白水平.

科学领域:

遗传学遗传学是一个
分子生物学分子生物学
血液学血液学血液学

背景情况:

包括状细胞病 (SCD) 和β-thalassemia在内的β-hemoglobinopathies是普遍存在的单一性血液疾病,由β-环球蛋白 (HBB) 基因突变引起.
目前的基因工程策略旨在通过同质导向修复 (HDR) 取代HBB基因,但在基因同质性和实现充分表达方面面临挑战.
恢复良性基因型和功能性HBB表达对于治疗这些贫血症至关重要.

研究的目的:

开发和验证基于CRISPR-Cas9的HBB基因替代策略,克服技术挑战.
设计一种避免同质性的DNA捐赠者模板,并确保β-环球蛋白的正确生理表达.
为了证明这种策略在造血干细胞和原生细胞 (HSPC) 中的疗效,用于治疗SCD和β-thalassemia.

主要方法:

利用CRISPR-Cas9基因编辑来准HBB基因位置.
设计了一种DNA捐赠者模板,具有分离的HBB编码序列和异质的,截断的马球因子,以避免同质性和促进表达.
使用HSPCs在SCD和β-thalassemia的体外模型中测试了基因替代策略.

主要成果:

在试管体内实现了34%的同质导向修复 (HDR) 效率.
在编辑的HSPC中成功地挽救了β-环球蛋白表达.
在长期在体内重新繁殖的HSPC中证明了持续的基因编辑,HDR等位基因的频率约为15%.

结论:

开发了一种新的HBB基因替代策略,使用CRISPR-Cas9和专门设计的DNA捐赠者.
该策略有效地解决了同质性问题,并恢复了自然调节的成人血红蛋白表达.
这种方法显示出通过编辑长期重复繁殖的HSPCs来治疗β-hemoglobinopathies的希望.

关键词:

克里斯普尔-Cas9是什么意思 HBB HBB 在线观看这就是HDR HDR.基因编辑基因编辑基因替代是一种基因替代.造血干细胞造血干细胞血红蛋白病变 - 血红蛋白病变状细胞疾病是一种状细胞疾病.在β-thalassemia中,

更多相关视频

An Efficient Strategy for Generating Tissue-specific Binary Transcription Systems in Drosophila by Genome Editing

An Efficient Strategy for Generating Tissue-specific Binary Transcription Systems in Drosophila by Genome Editing

Published on: September 19, 2018

Engineering Oncogenic Heterozygous Gain-of-Function Mutations in Human Hematopoietic Stem and Progenitor Cells

Engineering Oncogenic Heterozygous Gain-of-Function Mutations in Human Hematopoietic Stem and Progenitor Cells

Published on: March 10, 2023

相关概念视频

Exon Recombination

Exon Recombination

The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...

Gene Therapy

Gene Therapy

Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...