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在消极狗和EXON 7被删除的DMD患者中的反意义PMOs的In Vitro Multiexon跳过

Akinori Nakamura¹, Yoshitsugu Aoki², Maria Tsoumpra²

¹Department of Clinical Research, NHO Matsumoto Medical Center, Matsumoto, Japan. anakamu@shinshu-u.ac.jp.

Methods in molecular biology (Clifton, N.J.)

|July 28, 2025

概括

针对特定外因子的反感性寡核酸 (AO) 对杜申肌肉发育不良 (DMD) 有希望. 在肌肉发育不良的狗中使用的AO成功诱导了DMD患者具有类似突变的细胞中的外型跳转,验证了DMD研究的狗模型.

科学领域:

分子生物学分子生物学
遗传学遗传学是一个
生物医学研究生物医学研究

背景情况:

杜氏肌肉发育不良 (DMD) 是一种严重的遗传肌肉疾病.
抗意义寡核酸 (AO) 诱导的外显子跳转是DMD的潜在治疗策略.
狗的X关联肌肉缩模型 (CXMDJ) 已被用于研究AO疗法.

研究的目的:

评估从CXMDJ模型到人类DMD细胞的AO疗法的直接转化.
为了研究AOs的有效性,在一个被删除的DMD患者的细胞中准消极蛋白mRNA.
通过比较不同物种的AO疗效来验证狗作为DMD的临床前模型.

主要方法:

来自CXMDJ犬的纤维细胞和一个被删除7个外显子的DMD患者的纤维细胞使用MyoD转导和光激活细胞分类 (FACS) 转化为肌管.
针对6号和8号 Dystrophin exons 的 Antisense phosphorodiamidate morpholino oligomers (PMOs) 被设计用于狗和人类的序列.
用PMO的尾酒在体外生成的狗和人类肌管中进行,以评估外跳转和肌复原.

主要成果:

在狗和人类神经管中观察到6号和8号外显子的可比跳过疗效,导致素蛋白恢复.
为CXMDJ模型开发的反意义PMO成功诱导了DMD患者衍生细胞中的多氧跳.
异构9跳转因细胞起源而有所不同,表明了潜在的物种特异性细微差别.

结论:

在CXMDJ狗模型中有效的反意义PMO可以诱导具有类似突变的DMD患者的细胞中的外因子跳转.
这项研究支持了狗作为DMD相关的临床前模型的实用性,因为它保留了双氨酸序列.
这些发现有助于直接将基于AO的疗法从狗模型转化为人类DMD患者.

关键词:

这是一种反意义的寡核酸.日本的犬类X关联肌肉衰竭 (CXMDJ)杜恩/贝克尔肌肉发育不良 (DMD/BMD)迪斯特罗芬 (Dystrophin) 是一种消极蛋白质.在Exon跳过的情况下,Exon跳过.多种类型的跳过跳过.二胺酸形态寡合物 (PMOs) 的存在.

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