Parameters Affecting Image-guided, Hydrodynamic Gene Delivery to Swine Liver.

Parameters Affecting Image-guided, Hydrodynamic Gene Delivery to Swine Liver.
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DOI:
10.1038/mtna.2013.52
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发表时间:
2013-10-15
期刊:
Molecular therapy. Nucleic acids
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开发安全有效的肝细胞基因转染方法是肝脏疾病基因治疗的关键一步。在这里,我们评估的参数基因传递到大型动物(猪,40-65公斤)的肝脏使用图像引导的流体动力学为基础的程序,包括图像引导导管插入到小叶肝静脉和流体动力学注射报告质粒使用计算机控制的注射器。我们证明了注射参数(导管在肝血管系统中的相对位置、注射时的血管内压力和注射量)与手术的安全性和有效性直接相关。通过优化这些参数,我们首次探索了对人类大小的猪的多个肺叶进行顺序注射的程序的优势。优化的方法使人α-1抗胰蛋白酶基因在肝脏中持续表达超过2个月。此外,重复的流体动力学基因递送安全地进行,并且在整个研究期间没有观察到不良事件。我们的研究结果支持图像引导的流体动力学基因递送方法用于治疗肝脏疾病的临床适用性。
Development of a safe and effective method for gene delivery to hepatocytes is a critical step toward gene therapy for liver diseases. Here, we assessed the parameters for gene delivery to the livers of large animals (pigs, 40–65 kg) using an image-guided hydrodynamics-based procedure that involves image-guided catheter insertion into the lobular hepatic vein and hydrodynamic injection of reporter plasmids using a computer-controlled injector. We demonstrated that injection parameters (relative position of the catheter in the hepatic vasculature, intravascular pressure upon injection, and injection volume) are directly related to the safety and efficiency of the procedure. By optimizing these parameters, we explored for the first time, the advantage of the procedure for sequential injections to multiple lobes in human-sized pigs. The optimized procedure resulted in sustained expression of the human α-1 antitrypsin gene in livers for more than 2 months after gene delivery. In addition, repeated hydrodynamic gene delivery was safely conducted and no adverse events were seen in the entire period of the study. Our results support the clinical applicability of the image-guided hydrodynamic gene delivery method for the treatment of liver diseases.
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