The use of BMP-2 coupled - Nanosilver-PLGA composite grafts to induce bone repair in grossly infected segmental defects.

The use of BMP-2 coupled - Nanosilver-PLGA composite grafts to induce bone repair in grossly infected segmental defects.
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BMP-2耦合的使用 - 纳米层-PLGA复合移植物在严重感染的节段缺陷中诱导骨修复。

DOI:
10.1016/j.biomaterials.2010.08.041
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发表时间:
2010-12
期刊:
影响因子:
14
通讯作者:
Soo, Chia
Soo, Chia
中科院分区:
工程技术1区
文献类型:
--
作者:
Zheng, Zhong;Yin, Wei;Zara, Janette N.;Li, Weiming;Kwak, Jinny;Mamidi, Rachna;Lee, Min;Siu, Ronald K.;Ngo, Richard;Wang, Joyce;Carpenter, Doug;Zhang, Xinli;Wu, Benjamin;Ting, Kang;Soo, Chia

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污染/感染骨缺损的愈合是一个重大的临床挑战。多种抗生素耐药微生物的流行重新引起了人们对使用防腐剂银作为有效但毒性较小的抗菌剂的兴趣,降低了细菌耐药性的可能性。在这项研究中,我们证明了金属纳米银颗粒(尺寸为20-40 nm)-聚乳酸-乙醇酸共聚物(PLGA)复合移植物具有较强的抗菌性能。此外,与PLGA对照相比,纳米银颗粒-PLGA复合移植物没有抑制粘附、增殖、碱性磷酸酶活性或生长MC 3 T3-E1前成骨细胞的矿化。此外,纳米银颗粒不影响骨形态发生蛋白2(BMP-2)的骨诱导性。植入BMP-2偶联2.0%纳米银颗粒-PLGA复合移植物的感染性股骨缺损在12周内愈合,没有残留细菌的证据。相反,BMP-2偶联的PLGA对照移植物在持续细菌菌落存在下未能愈合。我们的研究结果表明,纳米银的定义的颗粒大小是杀菌,没有可辨别的体外和体内的细胞毒性或对BMP-2的骨诱导性的负面影响,使其成为一个理想的抗菌感染伤口的骨再生。
Healing of contaminated/infected bone defects is a significant clinical challenge. Prevalence of multi-antibiotic resistant organisms has renewed interest in the use of antiseptic silver as an effective, but less toxic antimicrobial with decreased potential for bacterial resistance. In this study, we demonstrated that metallic nanosilver particles (with a size of 20–40 nm)-poly(lactic-co-glycolic acid) (PLGA) composite grafts have strong antibacterial properties. In addition, nanosilver particles-PLGA composite grafts did not inhibit adherence, proliferation, alkaline phosphatase activity, or mineralization of ongrowth MC3T3-E1 pre-osteoblasts compared to PLGA controls. Furthermore, nanosilver particles did not affect the osteoinductivity of bone morphogenetic protein 2 (BMP-2). Infected femoral defects implanted with BMP-2 coupled 2.0% nanosilver particles-PLGA composite grafts healed in 12 weeks without evidence of residual bacteria. In contrast, BMP-2 coupled PLGA control grafts failed to heal in the presence of continued bacterial colonies. Our results indicate that nanosilver of defined particle size is bactericidal without discernable in vitro and in vivo cytotoxicity or negative effects on BMP-2 osteoinductivity, making it an ideal antimicrobial for bone regeneration in infected wounds.
DOI: 10.1016/s0142-9612(03)00367-3
发表时间: 2003-10-01
期刊: BIOMATERIALS
影响因子: 14
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