在神经元转基因表达后,AAV8载体诱导的化
Faye McLeod1, Elaine McDermott1, Shermin Mak1
1Centre for Transformative Neuroscience, Newcastle University Biosciences Institute, Newcastle upon Tyne, United Kingdom.
Frontiers in neuroscience
|March 18, 2024
概括
对大脑的腺相关病毒8 (AAV8) 基因疗法会引起轻度炎症,但会保留神经元. 使用AAV8表达光敏感通道显示出治疗等神经系统疾病的潜力.
科学领域:
- 神经科学是一个神经科学.
- 基因治疗 基因治疗
- 视觉遗传学 视觉遗传学
背景情况:
- 病毒媒介基因转移使光敏感离子通道的神经元表达成为潜在的治疗应用.
- 评估病毒载体对大脑皮质的不良影响,例如腺相关病毒8 (AAV8),对于安全的治疗用途至关重要,特别是在等疾病中.
研究的目的:
- 评估 AAV8 携带针对 soma 的光激活化物通道/FusionRed (FR) 结构对小鼠新皮质的影响.
- 为了评估AAV8介导基因传递后的神经炎症和神经元存活率.
主要方法:
- 在体外转导和全细胞补丁记录以确认神经元功能.
- 在体内,AAV8-FR构造物的内注射进入小鼠新皮质.
- 非侵入性光成像和免疫光染色用于FR,质和神经元标记物,以评估表达和组织反应.
主要成果:
- 成功的体外传导和光诱导的神经元反应.
- 在4周内,在注射部位周围进行渐进的体内转导,传播与病毒度成比例.
- 在注射部位附近观察到轻度的星细胞和微质,与FR表达成比例,但没有显著的神经元损失 (NeuN+细胞保存).
- 与对照组相比,素表达没有显著增加神经炎症.
结论:
- 在神经元特异性促进体下表达转基因的AAV8载体诱导轻度皮质炎症,没有显著的短期神经元损失.
- 通过AAV8表达素和光蛋白并不会显著加剧神经炎症.
相关概念视频
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Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
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Exon shuffling follows “splice frame rules.” Each exon has three reading...
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