中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (6): 899-905.doi: 10.3969/j.issn.2095-4344.2017.06.014

• 药物控释材料 drug delivery materials • 上一篇    下一篇

抗菌止血壳聚糖/黄连素多孔干凝胶的制备及其表征

汪  芳1,陈云平1,苏香萍2
  

  1. 1三峡大学中医临床医学院附属宜昌市中医医院,湖北省宜昌市  443000;2三峡大学化生学院,湖北省宜昌市  443000
  • 收稿日期:2016-12-04 出版日期:2017-02-28 发布日期:2017-03-16
  • 通讯作者: 陈云平,硕士,主治医师,三峡大学中医临床医学院附属宜昌市中医医院,湖北省宜昌市 443000
  • 作者简介:汪芳,男,1976年生,湖北省五峰县人,汉族,2009年泸州医学院毕业,硕士,副主任医师,主要从事口腔种植修复研究。
  • 基金资助:

    宜昌市科技局立项(A11301-57)

Preparation of porous biodegradable chitosan/berberine hydrochloride composite xerogel and its antibacterial and hemostatic properties

Wang Fang1, Chen Yun-ping1, Su Xiang-ping2
  

  1. 1Yichang Hospital of Traditional Chinese Medicine, Clinical Medical School of Chinese Medicine of China Three Gorges University, Yichang 443000, Hubei Province, China; 2Chemistry and Life Science School of China Three Gorges University, Yichang 443000, Hubei Province, China
  • Received:2016-12-04 Online:2017-02-28 Published:2017-03-16
  • Contact: Chen Yun-ping, Master, Attending physician, Yichang Hospital of Traditional Chinese Medicine, Clinical Medical School of Chinese Medicine of China Three Gorges University, Yichang 443000, Hubei Province, China
  • About author:Wang Fang, Master, Associate chief physician, Yichang Hospital of Traditional Chinese Medicine, Clinical Medical School of Chinese Medicine of China Three Gorges University, Yichang 443000, Hubei Province, China
  • Supported by:

    the Project of Yichang Science and Technology Bureau, No. A11301-57

摘要:

文章快速阅读:

 

文题释义:
壳聚糖
:是自然界中惟一的一种带正电荷的碱性多糖,具有强止血抗菌性。止血机制如下:首先,壳聚糖能通过本身阳离子特性,吸引具有阴离子特性的红细胞发生粘连聚集反应,从而快速形成血凝块止血;其次,壳聚糖作为大分子物质,在血液中发生聚合反应,形成空间网状结构,可捕获红细胞。另外,壳聚糖止血不依赖于凝血因子和血小板,但其能刺激血小板活化,促进血凝。此外,壳聚糖抗菌谱广,能有效抑制细菌和真菌的增殖,具有抗菌活性高,对哺乳动物毒性低的优势。壳聚糖的抗菌作用主要有以下2种机制:一种是壳聚糖通过吸附在细胞表面,形成一层高分子膜,阻止了营养物质向细胞内的运输,从而起到抑菌杀菌作用;另外一种机制是壳聚糖通过渗透进入细胞体内,吸附细胞体内带有阴离子的细胞质,并发生絮凝作用,扰乱细胞正常的生理活动,从而灭杀细菌。
多孔干凝胶:具较高表面积和相互连通的孔洞结构,是制备吸附剂的首选。壳聚糖可通过很简单的冷冻干燥法制备多孔材料,且壳聚糖分子链上含有许多氨基和羟基等功能基团,是一种绿色吸附剂。壳聚糖加工成多孔状的干凝胶,可吸收大于自身质量20倍的水,同时担载黄连素,能持续稳定释放。

背景:壳聚糖具有良好的生物相容性、生物可降解性、抗菌性及促凝血性等特点,能促进伤口愈合和组织修复,能担载黄连素并保证其快速稳定释放,可作为良好的抗菌止血材料。
目的:制备可降解壳聚糖/黄连素干凝胶,并表征其体外抗菌止血性能。
方法:利用冷冻干燥法制备壳聚糖/黄连素干凝胶,并通过扫描电子显微镜、傅里叶红外光谱表征其微观结构,MTT实验探讨其生物相容性,凝血抗菌实验检验其体外凝血抗菌效果。
结果与结论:①壳聚糖/黄连素干凝胶的孔隙率为83.1%-90.5%,72 h后基本完全降解于PBS溶液中;②壳聚糖/黄连素干凝胶的体外凝血能力、体外抗菌性能均强于壳聚糖,且随黄连素含量增高而增强;③壳聚糖/黄连素(质量百分比为10%)干凝胶的体外抗菌止血效果最佳;④结果表明,壳聚糖/黄连素干凝胶生物相容性较好且具有较强的抗菌止血效果,可应用为抗菌止血材料。

关键词: 生物材料, 材料相容性, 壳聚糖, 黄连素, 抗菌, 凝血

Abstract:

BACKGROUND: Chitosan (CS) holding a good biocompatibility, biodegradability, antibacterial property and hemostasis effect cannot only promote wound healing and tissue repair, but also exhibit sustained-control release when carrying berberine hydrochloride (Bh). Therefore it functions as an excellent antibacterial and hemostatic material.
OBJECTIVE: To prepare the porous CS/Bh composite xerogel and observe its antibacterial and hemostatic properties.
METHODS: The porous CS/Bh composite xerogel was prepared using freeze-drying method, and its microstructure was characterized by scanning electron microscope and Fourier transform infrared spectrometer. The biocompatibility was detected through MTT assay and the in vitro antibacterial and hemostatic properties were observed through antibacterial test and blood clotting index.
RESULTS AND COCNLUSION: The porosity of the CS/Bh composite xerogel was 83.1%-90.5% and almost degraded after 72 hours of immersion in PBS. The in vitro antibacterial and hemostatic properties of the composite xerogel were significantly better than those of CS, which were enhanced with the Bh content increasing. Additionally, the CS/Bh (10%) composite xerogel showed the best hemostatic and antibacterial abilities in vitro. To conclude, the CS/Bh composite xerogel possesses a good biocompatibility and strong hemostatic and antibacterial abilities, which is a promising postoperative antibacterial and hemostatic material.

Key words: Chitosan, Berberine, Anti-Bacterial Agents, Blood Coagulation, Tissue Engineering

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