Capsid serotype and timing of injection determines AAV transduction in the neonatal mice brain.

Capsid serotype and timing of injection determines AAV transduction in the neonatal mice brain.
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衣壳血清型和注射的时间决定了新生小鼠脑的AAV转导。

DOI:
10.1371/journal.pone.0067680
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Levites Y
Levites Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Chakrabarty P;Rosario A;Cruz P;Siemienski Z;Ceballos-Diaz C;Crosby K;Jansen K;Borchelt DR;Kim JY;Jankowsky JL;Golde TE;Levites Y

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腺相关病毒(AAV)介导的基因表达是基因治疗和临床前研究的有力工具。不同衣壳血清型的CNS细胞倾向、表达水平和生物分布尚未在新生啮齿动物中进行全面分析。我们之前的研究表明,在新生儿P0天脑室内注射AAV2/1可导致广泛的CNS表达,但如果在新生儿P1天之后注射则生物分布有限。为了扩展这些观察结果,我们探讨了注射时间对六种常用的假型aav在新生小鼠脑室内的向性和生物分布的影响。我们证明AAV2/8和2/9导致了大脑中最广泛的生物分布。大多数血清型显示不同的生物分布取决于注射日期。在新生儿P0天注射主要导致神经元转导,而在发育后期(出生后24-84小时)给药则导致更多的非神经元转导。AAV2/5显示星形胶质细胞的广泛转导,与注射时间无关。检测的血清型均未显示任何小胶质转导。本研究表明,衣壳血清型和注射时间都会影响AAV在新生啮齿动物体内的区域分布和细胞类型分布,并强调了伪型AAV载体在翻译基因治疗范例中的应用。
Adeno-associated virus (AAV) mediated gene expression is a powerful tool for gene therapy and preclinical studies. A comprehensive analysis of CNS cell type tropism, expression levels and biodistribution of different capsid serotypes has not yet been undertaken in neonatal rodents. Our previous studies show that intracerebroventricular injection with AAV2/1 on neonatal day P0 results in widespread CNS expression but the biodistribution is limited if injected beyond neonatal day P1. To extend these observations we explored the effect of timing of injection on tropism and biodistribution of six commonly used pseudotyped AAVs delivered in the cerebral ventricles of neonatal mice. We demonstrate that AAV2/8 and 2/9 resulted in the most widespread biodistribution in the brain. Most serotypes showed varying biodistribution depending on the day of injection. Injection on neonatal day P0 resulted in mostly neuronal transduction, whereas administration in later periods of development (24–84 hours postnatal) resulted in more non-neuronal transduction. AAV2/5 showed widespread transduction of astrocytes irrespective of the time of injection. None of the serotypes tested showed any microglial transduction. This study demonstrates that both capsid serotype and timing of injection influence the regional and cell-type distribution of AAV in neonatal rodents, and emphasizes the utility of pseudotyped AAV vectors for translational gene therapy paradigms.
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