开发基因编辑协议的多维响应表面方法 p67phox-缺陷慢性粒状瘤疾病的基因编辑协议
Thomas E Whittaker1, Shefta E Moula1, Sameer Bahal1
1Infection, Immunity, and Inflammation Research and Teaching Department, UCL, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom.
Human gene therapy
|December 8, 2023
概括
使用CRISPR/Cas9和腺相关病毒 (AAV) 进行基因编辑可以纠正遗传性血液疾病. 一种新的响应表面方法优化了造血干细胞中的基因校正,平衡了治疗性基因插入与细胞活性的作用.
科学领域:
- * 分子生物学 * 分子生物学
- * 基因治疗 基因治疗
- * 血液学 血液学
背景情况:
- *基因编辑通过替换有缺陷的基因,为遗传性血液疾病提供治疗潜力.
- *目前使用CRISPR/Cas9和腺相关病毒 (AAV) 进行针对性基因整合在造血干细胞中的方法面临挑战.
- * CD34+ 造血干细胞和祖细胞中的毒性和功能丧失阻碍了临床应用,需要优化基因校正策略.
研究的目的:
- * 开发一种灵活有效的方法来优化CD34+细胞中的基因校正.
- * 确定能够最大限度地增加治疗性基因插入的条件,同时最大限度地减少对细胞活力和功能的负面影响.
- * 应用优化的基因编辑协议来纠正特定的遗传性血液疾病,慢性粒状病 (CGD).
主要方法:
- *实施多维响应表面方法 (RSM) 以优化基因编辑参数.
- *研究不同剂量的腺相关病毒血清型6 (AAV2/6) 和CRISPR/Cas9核蛋白复合体.
- *评估CD34+细胞中的基因校正效率,细胞活力和殖民地形成单元 (CFU) 潜力.
主要成果:
- *RSM方法使得在单个实验中快速识别最佳基因编辑条件.
- *发现低剂量的AAV2/6和CRISPR/Cas9核核蛋白复合体可以保持CD34+细胞适应性,同时实现高向基因插入.
- *优化的条件成功地纠正了CGD患者的CD34+衍生中性粒细胞中的p67-phox缺乏,恢复了基因表达和细胞功能.
结论:
- *响应表面方法提供了一种优化血造干细胞基因编辑协议的有效策略.
- *已确定的低剂量编辑条件为提高血液疾病基因疗法的安全性和疗效提供了有希望的方法.
- * 在患者衍生细胞中成功纠正慢性颗粒状瘤疾病,证明了这种优化基因编辑策略的临床潜力.
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