PEG改性的聚丙烯酸酯膜控制口含烟烟碱体外释放的研究
2020-04-13简小朋张怡春王雨青李淼詹晓平史慧颖夭建华高茜
简小朋 张怡春 王雨青 李淼 詹晓平 史慧颖 夭建华 高茜



摘要 为了方便、高效地模拟口含烟烟碱的体内吸收行为,采用PEG改性的聚丙烯酸酯薄膜模拟人口腔黏膜,研究了聚合物薄膜控制口含烟烟碱的体外释放性能。结果表明,聚合物薄膜控制口含烟烟碱的体外释放符合零级释放方程,降低薄膜的厚度或增加薄膜中PEG的分子量,可以增大烟碱的渗透速率,DSC和SEM表征结果说明PEG和PAL互混后形成了均相的IPN-1D薄膜,接触角表征说明PEG增强了薄膜的亲水性,薄膜控制烟碱体外释放的渗透速率与烟碱的体内吸收速率值相近。因此,PEG改性的聚丙烯酸酯薄膜可用于口含烟烟碱的体外释放评价。
关键词 口含烟,口腔黏膜,烟碱,聚丙烯酸酯薄膜,体外释放
中图分类号 TS45文献标识码 A
文章编号 0517-6611(2020)06-0170-05
Abstract In order to simulate the in vivo absorption behavior of nicotine in snus,a PEGmodified polyacrylate film was used to simulate human oral mucosa,and the in vitro release of nicotine from the polymer film was studied.The results showed that the in vitro release behavior of nicotine from the polymer film accorded with a zeroorder release equation,the permeation rates of nicotine reduced with the increase of the thickness of the film or the molecular weight of PEG,DSC and SEM results indicated the IPN1D film mixing PEG and PAL was homogeneous,the contact angle characterization indicated that PEG enhanced the hydrophilicity of the film,the permeation rates of nicotine from the film were similar to the in vivo absorption rate of nicotine.Therefore,the PEGmodified polyacrylate film could be used for in vitro release evaluation of nicotine in snus.
Key words Snus,Oral mucosa,Nicotine,Polyacrylate film,In vitro release
口含烟是将磨碎的烟草颗粒经过加工后直接放在口腔中消费的一种无烟气烟草制品[1]。相比于传统卷烟,口含烟不发生燃烧和裂解,因此不产生燃烧产物和裂解产物,被认为对人体的危害性更小[2-7]。近年来,随着世界反吸烟运动的不断发展,口含烟作为烟草消费的补充形式日益受到关注,国内也已开展口含烟的各项研究工作[8-10],其中包括了评价口含烟效力的研究。由于人类吸食烟草制品行为的个体差异,烟草制品标示的烟碱量并不能准确反映人体摄入的烟碱量。若要准确评价口含烟的效力,需要监测烟碱的血药浓度和持续时间,但如果每批次的口含烟制品都要依赖体内试验获得这些数据,不仅操作繁琐,增加成本,还对实验人员和实验环境的要求较高。……
