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一个循环的Aptamer-ASO奇米拉,通过向抑制STAT5A表达来激活DLX5-调节的骨质生成

Jianfei Zhang¹, Heng Yu^2,3, Menghan Mao⁴

¹Department of Oral & Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, No. 639 Zhizaoju Road, Shanghai 200011, China.

ACS chemical biology

|November 6, 2025

概括

一种新型的循环阿帕特-反感性寡核酸合体 (CircApt-ASO) 通过向骨髓衍生的骨髓干细胞 (BMSCs) 和激活DLX5驱动的骨质生成来增强骨再生,为骨折愈合提供了更安全的替代方案.

科学领域:

生物材料科学生物材料科学
再生医学是一种再生医学.
分子生物学分子生物学

背景情况:

骨形态遗传蛋白 (BMPs) 可以加速骨折愈合,但会产生不良影响.
对于延迟结合和非结合骨折的现有疗法需要更安全,更有效的替代方案.

研究的目的:

开发一种新型治疗剂CircApt-ASO,用于增强骨质生成和骨再生.
针对特定的骨髓衍生介质干细胞 (BMSCs),并通过细胞内输送治疗性寡核酸.

主要方法:

设计了一种循环的阿帕特胺-反意义的寡核酸模拟体 (CircApt-ASO),针对BMSC上的转激素受体1 (TFR1).
使用CircApt-ASO的反STAT5A ASO组件,使DLX5的负调节器STAT5A变得沉默.
评估了生物稳定性,细胞毒性,基因沉默功效和骨质原体分化在体外和体内.

主要成果:

与线性阿普坦-ASO仿真体相比,CircApt-ASO表现出优越的生物稳定性和基因沉默.
与基于脂质体的输送相比,CircApt-ASO表现出微不足道的细胞毒性.
显著增强DLX5表达和下游骨质基因激活,从而改善了骨质基因分化.

结论:

CircApt-ASO代表了一种有前途的治疗策略,用于骨再生,特别是延迟结合和非结合骨折.
工程化明提供强大的骨质诱导活性与最小的细胞毒性,克服当前疗法的局限性.

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