标题: 多功能双性明胶奈米磁性胶囊于关节软骨组织修复之研究
Studies of Multi-functional Amphiphilic Gelatin Nanocapsules Platform on Articular Cartilage Tissue Repair
作者: 陈键谊
陈三元
Chen, Jian-Yi
Chen, San-Yuan
材料科学与工程学系奈米科技硕博士班
关键字: 双性高分子;明胶;奈米磁性胶囊;软骨;组织修复;Amphiphilic polymers;gelatin;magnetic nanocapsules;cartilage;tissue repair
公开日期: 2016
摘要: 现今,关节软骨相关病症在老年退化性疾病以及肥胖并发疾病中是一个相当常见的问题。尽管目前临床上有一些治疗手段及减缓恶化的方法,但要让关节软骨完全康复目前仍然是束手无策。在本研究中,我们发展出了具有整合组织工程的三要素 – 细胞、生医材料、生长因子 – 的多功能双性奈米磁性胶囊,应用于关节软骨分生的研究,整合了组织工程研究的要素。此研究共分成三部份。在第一部分,双性奈米磁性胶囊的制备是利用改质明胶透过双乳化的方式与超顺磁氧化铁奈米颗粒合成出具有奈米中空结构的双层胶囊。其壳核结构的亲疏水特性,赋予双性明胶奈米磁性胶囊具有同时携带亲疏水两种物质的高度可变动性,对于药物包覆上具有更多元的选择。第二部分则是在细胞测试中,我们发现载体对于软骨先驱型细胞的生物相容性,不论在短时间或长时间共同培养下都具有极佳的表现,而且细胞在短时间内即有吞噬载体的现象,大幅增加了油性超顺磁氧化铁奈米颗粒进入细胞的可行性。利用包覆其中的超顺磁氧化铁奈米颗粒其磁感应能力,赋予修复细胞吞噬载体后具有足以受到外部磁场引导并在患部大量累积的功能性,改善了临床的细胞疗法中无法长时间维持的困境。第三部份我们分析了软骨先驱型细胞对于受到双性明胶奈米磁性胶囊/外部磁场/转化生长因子β1三种刺激来源环境下的分化情况。透过免疫萤光染色(IF staining)、阿新蓝染色(alcian blue)以及其他软骨特性分析下,我们发现包覆转化生长因子β1的双性明胶奈米磁性胶囊,在外部磁场的作用刺激下,与外部磁场的作用刺激下的组别,在第二型胶原蛋白的分析上同样具有较高的蛋白质萤光与硫化糖胺聚糖的表现量,意味具有刺激其他先驱型细胞往正常健康的软骨细胞分化的潜力与可行性。因此,本研究发展出的双性明胶奈米磁性胶囊,结合了生物材料、细胞疗法与软骨刺激分化的功能,不仅仅在软骨组织修复上具有极高的发展潜能,其相容性与可塑性让我们期望双性明胶奈米磁性胶囊在组织工程上能有更多元的发展。
Articular cartilage disorder is a common joint disorder that often occurs on elderly, obese, or athletic population. In spite of several available clinical therapeutic options, there is no method available that facilitates complete healing of the articular cartilage. To overcome the obstacles, in this study, we developed a brand new nanomedicine biomaterial platform combining the three key factors – cells, biomaterials, and biofactors, with both physical and medical stimulation potential for promoting articular cartilage differentiation. We named it amphiphilic gelatin nanocapsules (AGNCs). AGNCs were synthesized with hexanoic anhydride (HA) graft-modified gelatin with superparamagnetic iron oxide (SPIOs) using double emulsification with two-phase (hydrophilic/hydrophobic) co-existence in one single protein-based nanoparticle. Furthermore, in a series examination of the basic and advanced characteristics on AGNCs on encapsulation, cell viability, cellular uptake and cell guiding ability results demonstrate a high availability and feasibility in in vitro tests. For articular cartilage tissue repair preliminary experiments, we choose a mouse teratocarcinoma cells – ATDC5 cells as our model cells to investigate chondrogenic inducements from the combination of AGNCs/ magnet/ rmTGF-β1. The immunofluorescence staining (IF), alcian blue, and Blyscan assay result showed that the expression of type II collagen in 7 and 14 days of stimulation shows a positive inducement on ATDC5 with external magnetic field and rmTGF-β1 stimuli. The above-mentioned results demonstrate the application of AGNCs is highly promising cartilage tissue repair.
URI: http://etd.lib.nctu.edu.tw/cdrfb3/record/nctu/#GT070251606
http://hdl.handle.net/11536/143111
显示于类别:Thesis