摘要
目的通过化学反应将西罗莫司嫁接到聚丙烯(polypropylene,PP)补片表面,制备新型西罗莫司药物涂层聚丙烯(sirolimus drug-coated polypropylene,SRL-PP)补片,并将其应用于动物实验,研究新型补片抗粘连性能。方法将西罗莫司通过化学反应的方法嫁接到PP补片表面制备SRL-PP补片,与PP补片组(PP组)及聚乙二醇修饰的聚丙烯(polyethylene glycol modified polypropylene,PEG-PP)补片组(PEG-PP组)形成对照。对3组补片分别进行表征分析(红外光谱检测、接触角测量),检测其拉伸性能,并分别通过手术植入大鼠腹腔,通过观察大鼠腹腔内粘连情况、组织病理学改变等研究新型西罗莫司药物涂层补片抗粘连性能。结果红外光谱分析表明SRL-PP补片在波长1 643 cm–1(酰胺基)处有新的吸收峰出现,提示西罗莫司成功上载到补片表面;SRL-PP补片亲水性优良,为腹膜间皮细胞生长提供了有利条件;SRL-PP补片力学性能同PP补片及PEG-PP补片无明显差异;SRL-PP组的大鼠腹腔粘连程度[(1.00±0.58)分]明显低于PP组[(5.17±0.69)分]及PEG-PP组[(4.00±0.58)分],且SRL-PP组与PP组比较,差异有统计学意义(t=2.76,P<0.05);SRL-PP组粘连组织在炎性细胞数量及炎性细胞因子表达水平上均明显低于PP组和PEG-PP组。结论通过化学反应的方法成功将西罗莫司上载到PP补片表面,动物实验表明西罗莫司药物涂层补片可以明显减轻大鼠腹腔粘连,为其临床试验及应用提供了依据。
Objective To prepare a new sirolimus drug-coated polypropylene(SRL-PP) mesh by grafting he sirolimus onto the surface of the polypropylene(PP) mesh via chemical reaction, and to apply the new mesh to animal experiment to explore its anti-adhesion properties. Methods The sirolimus was grafted onto the surface of the mesh by chemical reaction to prepare the SRL-PP mesh, which was compared with the PP mesh and the polyethylene glycol modified polypropylene(PEG-PP) mesh. The three groups of meshes were respectively characterized(infrared spectroscopy test, contact angle measurement), and their tensile property was measured. These meshes were implanted into the abdominal cavity of the rats respectively. The anti-adhesion properties of the new sirolimus drug-coated mesh was studied by intraperitoneal adhesion and histopathological change in rats. Results The results of infrared spectrum analysis showed that there was a new absorption peak at the wavelength 1 643 cm–1(amide group) of SRL-PP mesh,suggesting that sirolimus drug was successfully uploaded onto the surface of the mesh; the SRL-PP mesh was excellent in hydrophilicity, which provided a favorable condition for the growth of peritoneal mesothelial cells. There was no significant difference in mechanical properties between SRL-PP mesh and PP mesh or PEG-PP mesh, which provided a good mechanical guarantee for clinical application. The degree of abdominal adhesion in SRL-PP mesh group(1.00±0.58)was significantly lower than that in PP mesh group(5.17±0.69) and PEG-PP mesh group(4.00±0.58), and the tD value between SRL-PP mesh group and PP mesh group was 2.76(P<0.05). The number of inflammatory cells and the expression of inflammatory cytokines in the adhesion tissue in SRL-PP mesh group were significantly lower than those in PP mesh group and PEG-PP mesh group. Conclusions The sirolimus is successfully loaded onto the surface in the PP mesh by chemical reaction. Animal experiment shows that the sirolimus drug-coated mesh can significantly reduce the abdominal adhesion of the rats, which provides a basis for clinical trial and application.
引文
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