Biomater Sci:具有抗菌活性的骨相容性微球可再生受感染的骨缺损

2019-02-17 不详 网络

感染骨缺损的治疗仍然是一项艰巨的临床挑战,并且具有抗菌活性和骨质形成作用的骨植入物的设计现在被认为是用于感染控制和骨愈合的有力策略。在本研究中,研究人员制备了生物可吸收的多孔结构微球由由聚(1-丙交酯)和聚(乙二醇)嵌段组成的两亲嵌段共聚物。在用贻贝激发的聚多巴胺表面涂覆之后,通过依次通过生物矿化还原硝酸银和磷灰石,将微球加载纳米银。在优化的加载量下,尽管在体外评估中保留了强抗菌活性,但纳米银负载

感染骨缺损的治疗仍然是一项艰巨的临床挑战,并且具有抗菌活性和骨质形成作用的骨植入物的设计现在被认为是用于感染控制和骨愈合的有力策略。在本研究中,研究人员制备了生物可吸收的多孔结构微球由由聚(1-丙交酯)和聚(乙二醇)嵌段组成的两亲嵌段共聚物。

在用贻贝激发的聚多巴胺表面涂覆之后,通过依次通过生物矿化还原硝酸银和磷灰石,将微球加载纳米银。在优化的加载量下,尽管在体外评估中保留了强抗菌活性,但纳米银负载的微球对骨髓间充质干细胞的增殖和分化没有显示出不利影响。对于预先感染金黄色葡萄球菌的大鼠颅骨中的临界尺寸缺陷(φ= 8 mm),两用微球的填充证明了在体内杀死细菌的有效方法,同时它促进了随着微球的降解,新骨形成有效。

因此,结果表明具有骨传导和抗菌活性的生物可吸收微球是治疗感染的骨缺陷的良好选择。

原始出处:

Wei PF , Yuan ZY , et al., Regenerating infected bone defects with osteocompatible microspheres possessing antibacterial activity. Biomater Sci. 2018 Dec 18;7(1):272-286. doi: 10.1039/c8bm00903a.

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    2019-06-17 sunylz
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    2019-02-19 lfcmxl
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