Wei Yumeng, Liang Jing, Zheng Xiaoli, Pi Chao, Liu Hao, Yang Hongru, Zou Yonggen, Ye Yun, Zhao Ling
Department of Pharmaceutics, School of Pharmacy, Southwest Medical University.
Department of Biochemistry, The Institute of Basic Medical Sciences, Southwest Medical University, Jiangyang District.
Int J Nanomedicine. 2016 Dec 29;12:251-261. doi: 10.2147/IJN.S119895. eCollection 2017.
The present study aims to develop a kind of novel nanoliposomes for the lung-targeting delivery system of baicalin as a Chinese medicine monomer. Baicalin-loaded nanoliposomes were prepared by the effervescent dispersion and lyophilized techniques. Baicalin-loaded nanoliposomes had an average particle size of 131.7±11.7 nm with 0.19±0.02 polydispersity index, 82.8%±1.24% entrapment efficiency and 90.47%±0.93% of yield and sustaining drug release effect over 24 h and were stable for 12 months at least. In vitro no hemolytic activity was observed for the experimental drug concentration. After intravenous administration of baicalin-loaded nanoliposomes to rabbits, drug concentration in the lungs was the highest among the tested organs at all time points and was significantly higher than that of its solution. For the targeting parameters, the relative intake rate and the ratio of peak concentration of lung were 4.837 and 2.789, respectively. Compared with plasma, liver, spleen, and kidney, the ratios of targeting efficacy (T) to (T) of lung were increased by a factor of 14.131, 1.893, 3.357, and 3.470, respectively. Furthermore, the results showed that the baicalin-loaded nanoliposomes did not induce lung injury. Importantly, baicalin-loaded nanoliposomes showed better antitumor therapeutic efficacy in the nude mice bearing orthotopic human lung cancer with the median survival time of blank liposomes (11.40±0.16 days), baicalin solution (17.30±0.47 days), and baicalin-loaded nanoliposomes (25.90±0.53 days). Therefore, the liposome is a promising drug carrier with an excellent lung-targeting property and therapeutic effect for the treatment of lung disease, such as lung cancer.
本研究旨在开发一种新型纳米脂质体,用于作为中药单体的黄芩苷的肺靶向给药系统。采用泡腾分散和冻干技术制备了载黄芩苷纳米脂质体。载黄芩苷纳米脂质体的平均粒径为131.7±11.7nm,多分散指数为0.19±0.02,包封率为82.8%±1.24%,产率为90.47%±0.93%,并在24小时内具有持续释药效果,且至少在12个月内稳定。在实验药物浓度下,体外未观察到溶血活性。给家兔静脉注射载黄芩苷纳米脂质体后,在所有时间点,肺中的药物浓度在受试器官中最高,且显著高于其溶液的药物浓度。对于靶向参数,相对摄取率和肺峰浓度比分别为4.837和2.789。与血浆、肝脏、脾脏和肾脏相比,肺的靶向效率(T)与(T)的比值分别提高了14.131、1.893、3.357和3.470倍。此外,结果表明载黄芩苷纳米脂质体未诱导肺损伤。重要的是,载黄芩苷纳米脂质体在荷人原位肺癌裸鼠中显示出更好的抗肿瘤治疗效果,空白脂质体的中位生存时间为(11.40±0.16天),黄芩苷溶液为(17.30±0.47天),载黄芩苷纳米脂质体为(25.90±0.53天)。因此,该脂质体是一种有前途的药物载体,具有优异的肺靶向性能和治疗效果,可用于治疗肺部疾病,如肺癌。
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