WANG Chunjiang¹, HUANG Yongpeng¹, TANG Hui¹, LI Shengyuan^1,2, CHEN Bo¹

(1. State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China;2. School of Mechanical Engineering, Sichuan University of Science and Engineering, Yibin 644000, China)

Abstract: Four different mesoporous silica carrier materials were prepared by sol-gel process. Octreotide was loaded by impregnation adsorption-freeze drying process so as to construct micropowder pharmacy for inhalation of slow-release. Properties of carriers and micropowder preparations including morphology, particle size distribution, drug loading, in vitro release property, in vitro inhalation deposition were evaluated. Research results show that the four mesoporous silica carriers have different morphology, particle size, specific surface area and specific pore volume.All of the carriers can load octreotide effectively. The four kinds of micropowder pharmachies have different performance such as morphology, drug loading, in vitro release performance and in vitro inhalation deposition.The micropowder pharmachies named as mesoporous silica microspheres-octreotide have the best comprehensive properties, which meet the drug delivery requirements for pulmonary. For mesoporous silica microspheres-octreotide,emptying rate reaches 100%, fine particle fraction is greater than 60% and sustained drug release time lasts 24 h. Micropowder pharmachies maintain the original uniform monodisperse spherical morphology of carrier particles, which are situated to increase the accuracy and reproducibility of drug deliveries.

Keywords: sol-gel process; mesoporous silica; octreotide; micropowder pharmacy; inhalation of slow-release

Received： 2022-05-06，Revised：2022-11-01，Online：2022-12-01 20:15。

Funding Project：青年科技英才自主基金项目，编号：2021F4401。

First Author： 汪春江(1998—)，男，硕士研究生，研究方向为吸入及缓释药物微粉制剂的制备与应用。E-mail： wangcj327@163.com。

Corresponding Author： 陈博(1983—)，男，副研究员，博士，硕士生导师，研究方向为药物粉体制备与应用。E-mail：NBC_BoChen@163.com。