Cross-species evolution of a highly potent AAV variant for therapeutic gene transfer and genome editing.

Cross-species evolution of a highly potent AAV variant for therapeutic gene transfer and genome editing.
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DOI:
10.1038/s41467-022-33745-4
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发表时间:
2022-10-10
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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重组腺相关病毒(AAV)载体是一种有前途的基因传递平台,但正在进行的临床试验继续凸显出相对狭窄的治疗窗口。有效的临床转化至少在一定程度上受到动物物种间 AAV 生物学差异的影响。在这里,我们通过在小鼠、猪和猕猴中相继进化 AAV 衣壳库来应对这一挑战。我们发现了一种高效、跨物种兼容的变体 (AAV.cc47),它显示出以 AAV 血清型 9 为基准的改进属性,正常和患病小鼠模型中强大的报告基因和治疗基因表达、Cre 重组和 CRISPR 基因组编辑证明了这一点。 AAV.cc47 载体增强的转导效率在猕猴和猪中得到进一步证实,为人类基因疗法的潜在临床转化提供了强有力的理由。我们预计 ccAAV 载体不仅可以改善临床前研究中的预测模型,还可以通过扩大基于 AAV 的基因疗法的治疗窗口来改善临床可转化性。冈萨雷斯等人。使用病毒进化方法生成跨物种兼容的 AAV (ccAAV) 载体。他们描述了一种高效的新变体 AAV.cc47,其转导效率高于 AAV 血清型 9,并在不同的小鼠模型、猪和非人灵长类动物中显示出其功效。
Recombinant adeno-associated viral (AAV) vectors are a promising gene delivery platform, but ongoing clinical trials continue to highlight a relatively narrow therapeutic window. Effective clinical translation is confounded, at least in part, by differences in AAV biology across animal species. Here, we tackle this challenge by sequentially evolving AAV capsid libraries in mice, pigs and macaques. We discover a highly potent, cross-species compatible variant (AAV.cc47) that shows improved attributes benchmarked against AAV serotype 9 as evidenced by robust reporter and therapeutic gene expression, Cre recombination and CRISPR genome editing in normal and diseased mouse models. Enhanced transduction efficiency of AAV.cc47 vectors is further corroborated in macaques and pigs, providing a strong rationale for potential clinical translation into human gene therapies. We envision that ccAAV vectors may not only improve predictive modeling in preclinical studies, but also clinical translatability by broadening the therapeutic window of AAV based gene therapies. Gonzalez et al. use a viral evolutionary approach to generate cross-species compatible AAV (ccAAVs) vectors. They describe a highly potent new variant, AAV.cc47, with enhanced transduction efficiency over AAV serotype 9 and show its efficacy in different mouse models, pigs and non-human primates.
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