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Branched chitosans II: Effects of branching on degradation, protein adsorption and cell growth properties.

机译:支链壳聚糖II:支链对降解,蛋白质吸附和细胞生长特性的影响。

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The demand for biodegradable implant materials has fueled interest in chitosan as a biomaterial. In previous work, branched chitosans were synthesized and structurally characterized. In this study the biological properties of branched chitosans were explored. Branched chitosans were synthesized by grafting low molecular weight chitosan chains (1.6, 16 and 80 kDa) to high molecular weight (600 kDa) linear chitosans via reductive amination. Films of the branched materials were evaluated with regard to: lysozyme-mediated degradation; protein adsorption; cell adhesion and proliferation. Branched chitosan with a 1.6 kDa branch length exhibited higher degradation rates than either linear or higher branch length materials. Branched chitosans also exhibited reduced adsorption of bovine serum albumin that was more pronounced with thicker films. Branched chitosans supported proliferation of rat endothelial cells, but growth rates were significantly lower than on linear chitosan. The results of this study demonstrate that control of many aspects of chitosan's physical and biological properties can be achieved by changes in molecular architecture.
机译:对可生物降解的植入物材料的需求激发了对壳聚糖作为生物材料的兴趣。在以前的工作中,支链壳聚糖被合成并进行结构表征。在这项研究中,探索了支链壳聚糖的生物学特性。通过还原胺化将低分子量的壳聚糖链(1.6、16和80 kDa)接枝到高分子量(600 kDa)的线性壳聚糖上来合成支链壳聚糖。对支链材料的膜进行了评估:溶菌酶介导的降解;蛋白质吸附;细胞粘附和增殖。支链长度为1.6 kDa的支链壳聚糖的降解速率高于线性或支链长度更高的材料。支链壳聚糖还表现出减少的牛血清白蛋白吸附,这在较厚的薄膜中更为明显。支链壳聚糖支持大鼠内皮细胞的增殖,但生长速度显着低于线性壳聚糖。这项研究的结果表明,可以通过改变分子结构来控制壳聚糖的物理和生物学特性的许多方面。

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