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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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磺化壳聚糖的制备及其对生长因子活性的保护作用
DOI: 10.3724/SP.J.1105.2012.11230, PP. 418-426
Keywords: 磺化壳聚糖,碱性成纤维细胞生长因子,生物活性,肝素
Abstract:
以壳聚糖为基材,分别以氯磺酸、三甲胺·三氧化硫和丙磺酸内酯为磺化试剂,制备了3,6-O-磺化壳聚糖(OCS)、2-N-磺化壳聚糖(NCS)和2-N-磺丙基壳聚糖(PCS)3种磺化壳聚糖.采用红外光谱、核磁共振谱证明了磺化壳聚糖的结构,元素分析测定了磺化壳聚糖的磺化率.以组织修复过程中一种重要的活性因子——碱性成纤维细胞生长因子(bFGF)为目标因子,通过体外成纤维细胞培养实验,评价了不同磺化壳聚糖对bFGF活性的保护能力.结果显示,相对于未改性壳聚糖(CS),磺化壳聚糖对成纤维细胞的形态无显著影响.细胞活性检测结果显示,OCS和PCS对bFGF活性无明显的保护能力;NCS能有效提高bFGF促进成纤维细胞活性的能力,其对bFGF活性的保护能力可达肝素70%左右.磺化壳聚糖的bFGF活性保护能力不随磺化率的改变而变化.
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