载骨髓间充质干细胞的高孔聚己内酯-胶原纳米纤维膜修复大鼠长期鼓膜穿孔  

Repair of chronic tympanic membrane perforation by bone marrow mesenchymal stem cells-loaded high-porosity polycaprolactone-collagen nanofiber membrane scaffolds

作　　者：李硕[1] 胡浩磊 杨杰[1] 徐弢[3] 殷钢 李谊 Li Shuo;Hu Haolei;Yang Jie;Xu Tao;Yin Gang;Li Yi(Graduate School,Xinxiang Medical University,Xinxiang 453000,Henan Province,China;Department of Otolaryngology and Maxillofacial Surgery,The 988 Hospital of Joint Support Force of Chinese PLA,Zhengzhou 450000,Henan Province,China;Biological Manufacturing Center,Department of Mechanical Engineering,Tsinghua University,Beijing 100091,China)

机构地区：[1]新乡医学院研究生院,河南省新乡市453000 [2]中国人民解放军联勤保障部队第九八八医院耳鼻咽喉颌面外科,河南省郑州市450000 [3]清华大学机械工程系生物制造中心,北京市100091

出　　处：《中国组织工程研究》2024年第15期2371-2377,共7页Chinese Journal of Tissue Engineering Research

基　　金：河南省医学科技攻关计划项目(LHGJ20220916),项目名称:3D打印在军事训练引起的颌面骨折修复重建中的应用研究,项目负责人:殷钢。

摘　　要：背景:近年来出现许多新颖的鼓膜修补材料,包括贴片、3D打印支架等,然而经过这些材料修补后的鼓膜在厚度和内部结构上不同于天然鼓膜。目的:探究载骨髓间充质干细胞的高孔聚己内酯-胶原纳米纤维膜修补大鼠长期鼓膜穿孔的效果。方法:利用静电纺丝技术分别制备聚己内酯、聚己内酯-胶原与高孔聚己内酯-胶原纳米纤维膜,表征支架的表面形态、孔隙率及细胞相容性。取50只雄性SD大鼠,使用无菌23号针头刺破双耳鼓膜后下部联合丝裂霉素C、氢化可的松用药法建立鼓膜穿孔模型;造模12周后,采用随机数字表法将大鼠分为5组:空白对照组不进行任何治疗,其他4组鼓膜穿孔处分别植入聚己内酯纳米纤维膜(聚己内酯组)、聚己内酯-胶原纳米纤维膜(聚己内酯-胶原组)、高孔聚己内酯-胶原纳米纤维膜(高孔聚己内酯-胶原组)与载骨髓间充质干细胞的高孔聚己内酯-胶原纳米纤维膜(载细胞高孔聚己内酯-胶原组),每组10只,支架植入1,2,3,4周利用耳内镜检查鼓膜愈合情况,植入4周后进行鼓膜组织苏木精-伊红、Masson染色与Ki-67免疫组化染色观察。结果与结论:①支架表征:扫描电镜显示相较于其他纳米纤维膜,高孔聚己内酯-胶原纳米纤维膜具有排列更加整齐的纳米纤维结构与更大的表面孔径,并且孔隙率更高(P<0.001);细胞活死染色显示,骨髓间充质干细胞在3种支架上附着良好,其中高孔聚己内酯-胶原纳米纤维膜上的活细胞数量多于其他两种支架;阿尔马兰染色显示,高孔聚己内酯-胶原纳米纤维膜上的骨髓间充质干细胞增殖率高于其他两种纤维膜;②动物实验:除空白对照组外,随着纤维膜植入时间的延长,其他4组大鼠鼓膜逐渐愈合,其中载细胞高孔聚己内酯-胶原组愈合速度最快;苏木精-伊红、Masson与Ki-67免疫组化染色显示,载细胞高孔聚己内酯-胶原组大鼠鼓膜厚度适中且具BACKGROUND:In recent years,there have been many novel tympanic membrane repair materials,including patches and 3D-printed scaffolds.However,the tympanic membrane repaired by these materials is different from the natural tympanic membrane in terms of thickness and internal structure.OBJECTIVE:To explore the efficacy of bone marrow mesenchymal stem cells-loaded high-porosity polycaprolactone/collagen nanofiber membrane scaffolds in repairing chronic tympanic membrane perforation.METHODS:Polycaprolactone,polycaprolactone-collagen,and high-porosity polycaprolactone-collagen nanofiber membranes were prepared by electrospinning technology,and the surface morphology,porosity and cell compatibility of the scaffolds were characterized.The tympanic membrane perforation model of 50 male SD rats was established by puncturing the posterior lower part of both eardrums with a sterile 23-measure needle combined with mitomycin C and hydrocortisone.After 12 weeks of modeling,the rats were divided into five groups by the random number table method.The blank control group did not receive any treatment.In the other four groups,polycaprolactone nanofiber membrane(polycaprolactone group),polycaprolactone-collagen nanofiber membrane(polycaprolactone-collagen group),high-porosity polycaprolactone-collagen nanofiber membrane(high-porosity polycaprolactone-collagen group)and high-porosity polycaprolactone-collagen nanofiber membrane containing bone marrow mesenchymal stem cells(high-porosity polycaprolactone-collagen group)were implanted at the perforation of the tympanic membrane,respectively.Each group consisted of 10 animals.The healing of the tympanic membrane was examined by otoendoscopy after 1,2,3 and 4 weeks of stent implantation.Hematoxylin-eosin staining,Masson staining,and Ki-67 immunohistochemical staining were performed on the tympanic membrane after 4 weeks of implantation.RESULTS AND CONCLUSION:(1)Scaffold characterization:Scanning electron microscopy showed that compared with other nanofiber membranes,the highporosity polyc

关 键 词：静电纺丝技术 长期鼓膜穿孔 聚己内酯-胶原支架 间充质干细胞 纳米纤维膜 

分 类 号：R459.9[医药卫生—治疗学] R318.08[医药卫生—临床医学] R764.29