Complete genetic correction of ips cells from Duchenne muscular dystrophy.

Complete genetic correction of ips cells from Duchenne muscular dystrophy.
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DOI:
10.1038/mt.2009.274
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发表时间:
2010-02
期刊:
Molecular therapy : the journal of the American Society of Gene Therapy
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其他
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人类人工染色体(HAC)作为基因治疗载体具有几个优点,包括避免插入突变的稳定附加型维持和携带包括调控元件的大基因插入物的能力。诱导多能干细胞(iPS)具有基因治疗的巨大潜力,因为这些细胞可以从个体自身的组织中产生,并且当重新引入时可以有助于任何组织的专门功能。作为概念的证明,我们在本文中显示了使用具有完整基因组肌营养不良蛋白序列的HAC(DYS-HAC)对源自杜氏肌营养不良(DMD)模型(mdx)小鼠和人DMD患者的iPS细胞中的遗传缺陷的完全校正。通过微细胞介导的染色体转移(MMCT)转移DYS-HAC来校正iPS细胞中肌养蛋白的缺失或突变。DMD患者和mdx特异性iPS细胞与DYS-HAC一起引起畸胎瘤中三个胚层的分化,并且在肌肉样组织中检测到人肌营养不良蛋白表达。此外,产生来自mdx-iPS(DYS-HAC)细胞的嵌合小鼠,并且在检查的所有组织中检测到DYS-HAC,具有肌营养不良蛋白的组织特异性表达。因此,患者特异性iPS细胞和含TAC的缺陷基因的组合代表了基因和细胞疗法的强大工具。
Human artificial chromosome (HAC) has several advantages as a gene therapy vector, including stable episomal maintenance that avoids insertional mutations and the ability to carry large gene inserts including the regulatory elements. Induced pluripotent stem (iPS) cells have great potential for gene therapy, as such cells can be generated from the individual's own tissues, and when reintroduced can contribute to the specialized function of any tissue. As a proof of concept, we show herein the complete correction of a genetic deficiency in iPS cells derived from Duchenne muscular dystrophy (DMD) model (mdx) mice and a human DMD patient using a HAC with a complete genomic dystrophin sequence (DYS-HAC). Deletion or mutation of dystrophin in iPS cells was corrected by transferring the DYS-HAC via microcell-mediated chromosome transfer (MMCT). DMD patient- and mdx-specific iPS cells with the DYS-HAC gave rise to differentiation of three germ layers in the teratoma, and human dystrophin expression was detected in muscle-like tissues. Furthermore, chimeric mice from mdx-iPS (DYS-HAC) cells were produced and DYS-HAC was detected in all tissues examined, with tissue-specific expression of dystrophin. Therefore, the combination of patient-specific iPS cells and HAC-containing defective genes represents a powerful tool for gene and cell therapies.
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