Advanced antibacterial activity of biocompatible tantalum nanofilm via enhanced local innate immunity

doi:10.1016/j.actbio.2019.03.027

	Advanced antibacterial activity of biocompatible tantalum nanofilm via enhanced local innate immunity
	Yang, Chuang; Li, Jinhua; Zhu, Chongzun; Zhang, Qixuan; Yu, Jinlong; Wang, Jiaxing; Wang, Qiaojie; Tang, Jin; Zhou, Huaijuan; Shen, Hao
刊名	ACTA BIOMATERIALIA
	2019-04-15
卷号	89 页码:403
关键词	Ta nanofilm Antibacterial Innate immunity Immunomodulatory effect Biocompatibility
ISSN号	1742-7061
DOI	10.1016/j.actbio.2019.03.027
文献子类	Article
英文摘要	Tantalum (Ta) has been shown to enhance osseointegration in clinical practice, yet little is known about whether Ta nanofilms can be used as antimicrobial coatings in vivo. A highly biocompatible Ta nanofilm was developed using magnetron sputtering technology to further study the mechanism of its antibacterial effects in vivo and elucidate its potential for clinical translation. The Ta nanofilms exhibited effective antimicrobial activity against soft tissue infections but did not show an intrinsic antimicrobial effect in vitro. This inconsistency between the in vivo and in vitro antimicrobial effects was further investigated using ex vivo models. The Ta nanofilms could enhance the phagocytosis of bacteria by polymorphonuclear neutrophils (PMNs, neutrophils), reduce the lysis of neutrophils and enhance the proinflammatory cytokine release of macrophages. This accumulative enhancement of the local host defenses contributed to the favorable antibacterial effect in vivo. The alleviated osteolysis observed in the presence of the Ta nanofilms in the osteomyelitis model further proved the practicality of this antibacterial strategy in the orthopedic field. In summary, Ta nanofilms show excellent biocompatibility and in vivo antimicrobial activity mediated by the enhancement of local innate immunity and are promising for clinical application. Statement of Significance In this study, Ta nanofilms were deposited on titanium substrate by magnetron sputtering. Ta nanofilms exhibited excellent in vivo and in vitro biocompatibility. In vivo antimicrobial effects of Ta nanofilms were revealed by soft tissue infection and osteomyelitis models, while no direct antibacterial activity was observed in vitro. Comprehensive ex vivo models revealed that Ta nanofilms could enhance the phagocytosis of bacteria by neutrophils, reduce the lysis of neutrophils and promote the release of proinflammatory cytokines from macrophages. This immunomodulatory effect helps host to eliminate bacteria. In contrast to traditional antimicrobial nanocoatings which apply toxic materials to kill bacteria, this work proposes a safe, practical and effective Ta nanofilm immunomodulatory antimicrobial strategy with clinical translational prospect. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27176]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Yang, Chuang,Li, Jinhua,Zhu, Chongzun,et al. Advanced antibacterial activity of biocompatible tantalum nanofilm via enhanced local innate immunity[J]. ACTA BIOMATERIALIA,2019,89:403.
APA	Yang, Chuang.,Li, Jinhua.,Zhu, Chongzun.,Zhang, Qixuan.,Yu, Jinlong.,...&Shen, Hao.(2019).Advanced antibacterial activity of biocompatible tantalum nanofilm via enhanced local innate immunity.ACTA BIOMATERIALIA,89,403.
MLA	Yang, Chuang,et al."Advanced antibacterial activity of biocompatible tantalum nanofilm via enhanced local innate immunity".ACTA BIOMATERIALIA 89(2019):403.