畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (11): 2069-2077.doi: 10.11843/j.issn.0366-6964.2015.11.021

• 基础兽医 • 上一篇    下一篇

托氟沙星纳米乳的制备及其急性毒性研究

高娴1,欧阳五庆1*,李梦云2,刘岳1,王波臻3,郑寅1,杨鸣琦1*   

  1. (1.西北农林科技大学 动物医学院,杨凌 712100;2.河南科技大学 动物科技学院,洛阳 471003;3.石河子大学 动物科技学院,石河子 832003)
  • 收稿日期:2015-02-16 出版日期:2015-11-23 发布日期:2015-11-23
  • 通讯作者: 欧阳五庆,教授,主要从事新兽药研发、纳米生物技术和细胞生物学研究,E-mail:oywq506@sina.com;杨鸣琦,教授,主要从事动物病理学研究,E-mail:xbndymq@163.com
  • 作者简介:高娴(1989-),女,山西保德人,硕士生,主要从事动物病理学研究,E-mail:xianzi908111@163.com
  • 基金资助:

    农业科技成果转化资金项目(2013GB2G000475)

Study on the Preparation and Acute Toxicity of Tosufloxacin Nanoemulsion

GAO Xian1,OUYANG Wu-qing1* ,LI Meng-yun2,LIU Yue1,WANG Bo-zhen3,ZHENG Yin1,YANG Ming-qi1*   

  1. (1.College of Veterinary Medicine,Northwest A & F University,Yangling 712100,China;2.College of Animal Science and Veterinary,Henan University of Science and Technology,Luoyang 471003,China;3.College of Animal Science and Veterinary,Shihezi University,Shihezi 832003,China)
  • Received:2015-02-16 Online:2015-11-23 Published:2015-11-23

摘要:

拟制备托氟沙星纳米乳,并对其理化性质与急性毒性进行研究。以纳米乳的载药量、稳定性为考察指标,筛选油相、表面活性剂、助溶剂,结合伪三元相图确定纳米乳的最佳配方,制备托氟沙星纳米乳。通过透射电镜、激光粒度分析仪测定纳米乳的微观形态、粒径;用高效液相色谱仪检测药物含量,通过影响因素试验、加速试验、长期试验考察其稳定性与有效期;经小鼠灌胃试验评价其急性毒性。结果显示,托氟沙星纳米乳的最佳配方:托氟沙星1.36%、牛至油3.24%、乳酸2.60%、聚氧乙烯醚-40-氢化蓖麻油25.98%、蒸馏水66.82%。该纳米乳的乳滴呈圆球形,平均粒径为16.16 nm,稳定性良好,有效期为24个月。托氟沙星在3~100 μg•mL-1浓度范围内与对应的峰面积线性关系良好,纳米乳的平均回收率为99.33%±1.24%,相对标准偏差为1.25%,精密度较高。小鼠灌胃LD50>10 000 mg•kg-1,最大耐受剂量为39.72 g•kg-1。成功制备了托氟沙星纳米乳,为进一步开发纳米级抗菌药物提供理论依据。

Abstract:

The purpose of this study was to prepare tosufloxacin nanoemulsion and to analyse its physical and chemical properties and acute toxicity.The oil phase,surfactant and solubilizer were selected according to the drug loading and stability of the nanoemulsion,the optimum formula was designed using pseudo-ternary phase diagrm,prepared tosufloxacin nanoemulsion.The configuration and particle size of tosufloxacin nanoemulsion were measured by TEM and LPSA.The drug content of tosufloxacin nanoemulsion was determined through High Performance Liquid Chromatography(HPLC).The stability and shelf life were tested by stress testing,accelerated testing and long-term testing.Its acute toxicity was evaluated by gavage testing in mice.The results showed that the optimum formula of tosufloxacin nanoemulsion was composed of tosufloxacin(1.36%),origanum oil(3.24%),lactic acid(2.60%),RH-40(25.98%),and distilled water(66.82%).The droplet shape of this nanoemulsion was spherical,with the average diameter of 16.16 nm,and its stability was good,the shelf life was 24 months.As the concentrations of tosufloxacin ranged from 3 to 100 μg•mL-1,the concentrations and peak areas showed good linear relationship;the average recovery rate and relative standard deviation of tosufloxacin nanoemulsion were 99.33%±1.24% and 1.25%,respectively;the precision of this nanoemulsion was well.The LD50 of tosufloxacin nanoemulsion was greater than 10 000 mg•kg-1,the MTD of this nanoemulsion was 39.72 g•kg-1.The tosufloxacin nanoemulsion was prepared successfully,and it will provide a theoretical basis for the further development of nanoscale antimicrobial agents.

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