吉林大学学报(医学版) ›› 2019, Vol. 45 ›› Issue (01): 17-22.doi: 10.13481/j.1671-587x.20190104

• 基础研究 • 上一篇    

壳聚糖-明胶-果胶仿生网络膜对间充质干细胞增殖和矿化的影响

孙红1, 闫志文1, 李硕峰1, 熊艳杰2, 梁凡1, 李傲1, 姚芳莲3, 车鹏程1   

  1. 1. 华北理工大学基础医学院 河北省慢性疾病重点实验室, 河北 唐山 063210;
    2. 华北理工大学附属医院病理科, 河北 唐山 063000;
    3. 天津大学化工学院高分子科学与工程系, 天津 300072
  • 收稿日期:2018-04-25 发布日期:2019-01-28
  • 通讯作者: 车鹏程,教授,硕士研究生导师(Tel:0315-8805157,E-mail:3725930@163.com) E-mail:3725930@163.com
  • 作者简介:孙红(1972-),女,河北省唐山市人,教授,主任医师,医学博士,主要从事组织工程和再生医学方面的研究。

Effects of biomimetic network membrane prepared by chitosan/gelatin/pectin on proliferation and mineralization of mesenehymal stem cells

SUN Hong1, YAN Zhiwen1, LI Shuofeng1, XIONG Yanjie2, LIANG Fan1, LI Ao1, YAO Fanglian3, CHE Pengcheng1   

  1. 1. Key Laboratory for Chronic Diseases of Hebei Province, School of Basic Medical Sciences, North China University of Science and Technology, Tangshan 063210, China;
    2. Department of Pathology, Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, China;
    3. Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2018-04-25 Published:2019-01-28
  • Contact: 国家自然科学基金资助课题(81101448);河北省科技厅自然科学基金资助课题(H2017209005);河北省唐山市科技创新团队培养计划资助课题(18130211B);华北理工大学研究生创新项目资助课题(2018S26) E-mail:3725930@163.com

摘要: 目的:探讨采用壳聚糖、明胶和果胶制备的仿生网络膜对间充质干细胞(MSCs)增殖和矿化的影响,评价其用于构建组织工程骨的可行性。方法:采用仿生学方法,将壳聚糖、明胶和果胶按照一定比例制作成新型仿生网络膜。实验分为对照组(MSCs+常规培养基)、材料组(MSCs+网络膜+常规培养基)和材料+成骨诱导培养基(OS)组(MSCs+网络膜+OS培养基)。倒置相差显微镜下观察细胞形态表现,扫描电镜(SEM)观察细胞生长及细胞外基质分泌情况,MTT法检测细胞增殖情况(MSCs分为阴性对照组和材料组,分别以空白培养液和含材料的培养液培养),茜素红染色检测细胞中钙无机物表达情况,实时聚合酶链反应(Real time-PCR)测定细胞中骨钙素(OC) mRNA和骨桥蛋白(OPN) mRNA表达水平。结果:网络膜材料呈半透明薄膜状,倒置相差显微镜下MSCs为短梭形,细胞成簇状聚集生长。SEM下观察,细胞培养第7天可见梭形细胞;培养第14天时细胞数量增多,以伪足状突起锚定于材料表面;培养第21天时,细胞聚集并分泌大量细胞外基质。材料组细胞增殖水平与阴性对照组比较差异无统计学意义(P>0.05)。茜素红染色,网络膜上细胞被染成橘红色。Real time-PCR法,材料组和材料+OS组MSCs中OC mRNA在接种后第7和14天时表达水平较低,第21天时其表达水平明显升高,达到峰值;OPN mRNA在第7天明显表达,第14天时表达水平达峰值,第21天略有下降;与对照组比较,不同时间点材料组和材料+OS组细胞中OC mRNA和OPN mRNA表达水平明显升高(P<0.01),而材料组与材料+OS组比较差异无统计学意义(P>0.05)。结论:壳聚糖-明胶-果胶仿生网络膜具有良好的生物相容性,MSC在其表面可正常生长和增殖,在不加诱导剂的情况下可以诱导MSCs表达矿化相关的基因和蛋白。

关键词: 壳聚糖, 明胶, 果胶, 仿生材料, 间充质干细胞, 矿化

Abstract: Objective:To explore the effects of the biomimetic network membrane prepared by chitosan/gelatin/pectin on the proliferation and mineralization of mesenchymal stem cells (MSCs), and to evaluate its feasibility of constructing tissue engineering bone.Methods: Chitosan, gelatin and pectin were made into a new biomimetic network membrane in a certain ratio by biomimetics.The experiment was divided into control group(MSCs+conventional medium),material group(MSCs+network membrane+conventional medium)and material+OS group(MSCs+ network membrane+OS medium).The cell morphology was observed by inverted phase contrast microscope; the growth and secretion of extracellular matrix of the MSCs were observed under scanning electron microscope(SEM).The proliferation of cells was determined by MTT assay(The MSCs were divided into negative control group and material group,and they were cultivated with blank medium and medium including materials).The expression of calcium in MSCs was detected by Alizarin Red staining.Real-time polymerase chain reaction (RT-PCR) was used to determine the expression levels of osteocalcin (OC) mRNA and osteopontin (OPN) mRNA in the MSCs.Results: The network membrane was semitransparent thin film.The MSCs were short shuttle and clustered under inverted phase contrast microscope.After cultured for 7 d,the MSCs were shuttle; after cultured for 14 d,the number of MSCs was increased,with pseudo feet on the membrane;after cultured for 21 d,the MSCs clustered with a lot of neo-formed extracellular matrix.The MTT results showed that there was no significant difference in the proliferation level of MSCs between material group and negative control group (P>0.05).The Alizarin Red staining results showed that the MSCs in the network membrane were dyed orange red.The RT-PCR results showed that the expression levels of OC mRNA in the MSCs in material group and material+OS group were lower on the 7th and 14th days, but on the 21th day,the expression levels were significantly increased and reached the peak;the expression level of OC mRNA in the MSCs in material group was significantly increased on the 7th day, and the expression level reached the peak on the 14th day, then fell slightly on the 21th day;compared with control group,the expression levels of OC mRNA and OPN mRNA in the cells in material group and material+OS group at different time points were significantly increased(P<0.01),but there were no significant differences between material group and material+OS group(P>0.05).Conclusion: Chitosan/gelatin/pectin biomimetic network membrane has good biocompatibility,and MSCs can grow and proliferate well on the membrane.The membrane can induce the MSCs to express mineralization-related genes and proteins without inducers.

Key words: chitosan, gelatin, pectin, biomimetic materials, mesenchymal stem cells, mineralization

中图分类号: 

  • R318.08