Surface Modification of Biomimetic PLGA-(ASP-PEG) Matrix with RGD-Containing Peptide: a New Non-Vira

来源 :武汉理工大学学报(材料科学版)英 | 被引量 : 0次 | 上传用户:slrjlc2009
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
RGD-containing peptide (K16-GRGDSPC), characterized as non-viral gene vectors, was fabricated to modify the surface of PLGA-[ASP-PEG] matrix, which offered the foundation for gene transfer with porous matrix of gene activated later. Peptide was synthesized and matrix was executed into chips A,B and chip C. Chip C was regarded as control. Chips A and B were reacted with cross-linker. Then chip A was reacted with peptide. MS and HPLC were used to detect the MW and purity of peptide. Sulphur, existing on the surface of biomaterials, was detected by XPS. The purity of un-reacted peptide in residual solution was detected by a spectrophotometer. HPLC shows that the peptide purity was 94%-95%, and MS shows that the MW was 2 741.3307. XPS reveals that the binding energy of sulphur was 164 eV and the ratio of carbon to sulphur (C/S) was 99.746∶0.1014 in reacted chip A. The binding energy of sulphur in reacted chip B was 164 eV and 162 eV, C/S was 99.574∶0.4255, and there was no sulphur in chip C. Peptide was manufactured and linked to the surface of biomimetic and 3-D matrix, which offered the possibilities for gene transfer and tissue engineering with this new kind of non-viral gene vector.
其他文献
期刊
现今我们所适用的数据车工技术可以说代表了我国最先进也是最核心的制造水平.笔者就是就车工的数控技术的主要特点进行分析,同时也在这个过程中就其编程等工艺问题简单的进行
在经过两个月的选票收集和近一个月的统计以及最后的抽奖工作后,“手机风云榜2003”——年度手机有奖评选活动终于成功地画上了句号。本次活动得到了广大读者朋友的热烈支持
期刊
随着生活水平以及各种技术的快速进展,当前的电气工程已经深入到人们的平时的生活以及各种活动中,而电气自动化技术的应用,不但,可以快速的提高电气工程中的运用效率,而且,还
目的观察1,25–二羟维生素D3[1,25–(OH)2D3]对高糖状态下人近端肾小管上皮细胞(HK–2)维生素D受体(VDR)以及血管紧张素Ⅱ(Ang Ⅱ)表达的影响。方法体外培养HK–2细胞,实验分为对照组(糖浓度5.5 mmol/L)、甘露醇组(19.5 mmol/L)、高糖组(糖浓度25.0 mmol/L)、高糖+1,25–(OH)2D3组(浓度1.0×10–6、1.0×10–7、1.0×1
目的 筛选并建立结直肠癌特异性微小RNA (miRNA)诊断指纹图谱.方法 收集40例结直肠癌患者组织及血清标本和40例正常对照标本,应用反转录-聚合酶链反应(RT-PCR)技术检测25种特
期刊
主要从智能卡的物理安全 ,个人身份鉴别以及智能卡的通信安全和保密这三个方面来介绍智能卡安全技术的实现方法 ,并以 MC68HC0 5 SC系列为例介绍了智能卡的应用 Mainly from