中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (2): 267-273.doi: 10.3969/j.issn.2095-4344.0017

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

弱激光对植入式葡萄糖传感器外膜材料壳聚糖和Nafion生物相容性的影响

沈  浩1,刘  俊2,敬微微3,索永宽1,常世杰1,沙宪政1
  

  1. 1中国医科大学公共基础学院生物医学工程教研室,辽宁省沈阳市  110012;  2厦门大学附属第一医院,福建省厦门市  361000;3中国医科大学附属第一医院,辽宁省沈阳市  110012
  • 收稿日期:2017-08-14 出版日期:2018-01-18 发布日期:2018-01-18
  • 通讯作者: 沙宪政,教授,中国医科大学公共基础学院,辽宁省沈阳市 110012
  • 作者简介:沈浩,男,1991年生,辽宁省抚顺市人,满族,中国医科大学在读硕士,主要从事传感器生物材料研究。
  • 基金资助:
    沈阳市科技专项资金(沈科发[2012]29号);辽宁省教育厅科学研究项目(L2015563)

Weak laser effects on the biocompatibility of chitosan and Nafion as implantable glucose sensor outer materials  

Shen Hao1, Liu Jun2, Jing Wei-wei3, Suo Yong-kuan1, Chang Shi-jie1, Sha Xian-zheng1
  

  1. 1Department of Biomedical Engineering, School of Fundamental Sciences, China Medical University, Shenyang 110012, Liaoning Province, China; 2The First Affiliated Hospital of Xiamen University, Xiamen 361000, Fujian Province, China; 3The First Affiliated Hospital of China Medical University, Shenyang 110012, Liaoning Province, China
  • Received:2017-08-14 Online:2018-01-18 Published:2018-01-18
  • Contact: Sha Xian-zheng, Professor, Department of Biomedical Engineering, School of Fundamental Sciences, China Medical University, Shenyang 110012, Liaoning Province, China
  • About author:Shen Hao, Studying for master’s degree, Department of Biomedical Engineering, School of Fundamental Sciences, China Medical University, Shenyang 110012, Liaoning Province, China
  • Supported by:
    the Special Funds of Science and Technology of Shenyang City, No. [2012]29; the Scientific Research Project of Liaoning Provincial Education Department, No. L2015563

摘要:

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文题释义:
低剂量弱激光:弱激光是功率小于10 mW/cm2的激光,因为光在时间上有累加效应,激光的照射能量基于下面的公式:照射时间(s)=照射能量(J/cm2)/激光功率(W/cm2),实验中使用的照射时间和照射能量对应关系为照射2 min(照射能量为1.2 J/cm2),照射4 min(照射能量为2.4 J/cm2),照射6 min(照射能量为3.6 J/cm2)。
Nafion:是全氟化磺酸酯构成的阳离子交换剂,磺酸基对阳离子具有良好的选择性,而且机械性能良好,不溶于水,是一种不可降解的生物材料。Nafion还对一些反应能起到催化作用,由于其选择性透过的特性,所以抗干扰能力较强。
 
背景:通过施加外在因素可改变壳聚糖和Nafion的生物相容性。
目的:探究不同弱激光(红光、蓝光、绿光)照射对多孔壳聚糖膜和Nafion膜材料生物相容性的影响。
方法:①多孔壳聚糖膜实验:将48只SD大鼠随机分为红光、蓝光、绿光照射组,每组16只。沿脊柱为对称轴,在大鼠背部皮下组织两侧各植入2个多孔壳聚糖圆形膜,红光照射组每只大鼠4个膜材料分别以红色弱激光照射0,2,4,6 min,每天均在同一时间段内照射,持续照射至材料植入7,14,28,56 d取材,进行组织学分析;蓝、绿光照射处理方式同红光照射组;②Nafion膜实验:将24只SD大鼠随机分为红光、蓝光、绿光照射组,每组8只。沿脊柱为对称轴,在大鼠背部皮下组织两侧各植入2个Nafion圆形膜,红光照射组每只大鼠4个膜材料分别以红色弱激光照射0,2,4,6 min,每天均在同一时间段内照射,持续照射至材料植入7,14 d取材,进行组织学分析;蓝、绿光照射处理方式同红光照射组。
结果与结论:①红色弱激光照射后,多孔壳聚糖膜植入7 d时的红细胞平均密度相对较高,而对应的红细胞累积吸光度值也较大;其他植入时间点下,有的组别这两个值也较大,但变化趋势不尽相同,整体来看红色弱激光照射可提高膜材料周围的血管密度;②红色弱激光照射后,Nafion膜周围的血细胞密度和面积增加,植入7 d时的红细胞累积吸光度值增加较为明显,整体上,红色弱激光照射可显著提高Nafion膜周围的血管密度;③绿色弱激光照射4 min能有效减轻多孔壳聚糖膜周围炎症反应强度,而蓝色弱激光对多孔壳聚糖膜植入后的炎症影响较小;绿色弱激光可减弱Nafion膜植入7 d内的炎症反应,而蓝色弱激光没有这种效果;④红色弱激光照射对两种膜周围炎症反应和纤维包膜厚度的影响较小,蓝绿色弱激光对两种膜周围纤维包膜厚度和血管密度影响较小,而且变化无明显规律,整体上,绿光弱激光在一定程度能提高膜材料的生物相容性;⑤结果表明,弱激光照射在一定程度上能提高多孔壳聚糖膜和Nafion膜的生物相容性。

关键词: 生物材料, 壳聚糖, Nafion, 弱激光, 生物相容性, 植入式葡萄糖传感器

Abstract:

BACKGROUND: The biocompatibility of chitosan and Nafion can be improved by external factors.
OBJECTIVE: To explore the effect of different weak laser irradiations (red, blue, green) on biocompatibility of porous chitosan membrane and the Nafion membrane.
METHODS: (1) Porous chitosan membrane test: Forty-eight Sprague-Dawley rats were randomized into red, green, blue light groups (n=16 per group). Porous chitosan membranes (two membranes at each side) were implanted into the bilateral subcutaneous tissue of the rat back with the spine as the axis of symmetry, and then the four implanted membranes in each rat were irradiated by red light for 0, 2, 4, 6 minutes respectively. The irradiation lasted until sample collection at 7, 14, 28 and 56 days after implantation, and the samples were used for histological analysis. The same procedures were done in the blue and green light groups. (2) Nafion membrane test: Twenty-four Sprague-Dawley rats were randomized into red, blue and green light groups (n=8 per group). Nafion membranes (two membranes at each side) were implanted into the bilateral subcutaneous tissue of the rat back with the spine as the axis of symmetry, and then the four implanted membranes in each rat were irradiated by red light for 0, 2, 4, 6 minutes respectively. The irradiation lasted until sample collection at 7 and 14 days after implantation, and the samples were used for histological analysis. The same procedures were done in the blue and green light groups.
RESULTS AND CONCLUSION: The content of red blood cells in blood vessels and vascular density around the membrane materials (porous chitosan membranes and Nafion membranes) increased after irradiated by red light (especially at 7 days after implantation); the red light had less influence on the inflammatory response and fibrous capsule thickness around the two kinds of membranes. The inflammatory cells percentage around the membrane materials irradiated by green light for 4 minutes was significantly reduced, and the blue light had less influence on inflammatory responses; blue and green lights showed effects on the fibrous capsule thickness and vascular density around the membrane materials, but the effect was not obvious. Thus, to a certain extent, weak lasers can improve the biocompatibility of PCSM and Nafion membrane.

Key words: Chitosan, Lasers, Biosensing Techniques, Tissue Engineering

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