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相关概念视频

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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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...
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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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针对线粒体疾病的基因疗法.

Nandaki Keshavan1,2, Michal Minczuk3, Carlo Viscomi4,5

  • 1UCL Great Ormond Street Institute of Child Health, London, UK.

Journal of inherited metabolic disease
|January 3, 2024
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概括

基因疗法在使用腺相关病毒载体和基因编辑工具治疗原发性线粒体疾病 (PMDs) 方面表现有前途. 莱伯遗传性视神经病变的临床试验正在推进,但对器官向和试验设计的挑战仍然存在.

关键词:
在 AAV AAV AAV 中.克里斯普尔是什么意思?克里斯普尔是什么意思?伦敦LHON 在线观看基因编辑 基因编辑基因治疗的基因疗法线粒体疾病是线粒体疾病.

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科学领域:

  • 遗传学 是一个遗传学.
  • 分子生物学分子生物学
  • 神经学 神经学

背景情况:

  • 主要线粒体疾病 (PMDs) 是一组异质的使人衰弱的遗传疾病.
  • 目前对PMD的治疗方法有限,这凸显了对新型治疗策略的需求.
  • 基因疗法为解决PMDs的潜在遗传缺陷提供了一个有希望的途径.

研究的目的:

  • 审查基因治疗在治疗初级线粒体疾病中的当前应用.
  • 突出突出基因替代和基因编辑技术对PMDs的进步.
  • 讨论PMD的基因疗法的临床转化所面临的挑战和未来方向.

主要方法:

  • 在PMD小鼠模型中使用复合腺相关病毒 (rAAV) 载体进行基因替代的临床前研究的综述.
  • 对Lenadogene nolparvovec在Leber遗传视神经病变中的临床试验数据的分析.
  • 对基因编辑技术的评估,包括核酶 (TALENs,ZFNs,mitoARCUS) 和CRISPR-Cas9,用于向核和线粒体DNA缺陷.
  • 对基因治疗和基因编辑工具的体内输送方法的评估.

主要成果:

  • 在超过十个PMD小鼠模型中成功进行了临床前基因替代,使用先进的rAAV技术对器官进行向.
  • 在治疗Leber遗传性视神经病变的lenadogene nolparvovec的第三期临床试验中取得了积极的结果,证明了疗效和耐受性.
  • 核酶和基于CRISPR的基因编辑的进步显示了治疗PMD中核和线粒体DNA缺陷的潜力.
  • 在小鼠模型中,通过rAAV在体内输送基因编辑工具已经成功.

结论:

  • 基因疗法,特别是使用rAAV载体和基因编辑,对于原发性线粒体疾病具有显著的治疗潜力.
  • 勒伯遗传视神经病变是成功基因疗法转换的领先例子,目前正在进行临床试验.
  • 克服器官转导效率方面的挑战和优化临床试验设计对于在PMD中更广泛地应用基因疗法至关重要.