Antimicrobial silver-filled silica nanorattles with low immunotoxicity in dendritic cells

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• 作者：Magdalena Priebe ; PhD^a ; ¹ ; Jé ; rô ; me Widmer^b ; ¹ ; Nina Suhartha Lö ; wa ; PhD^b ; Sarah-Luise Abram^a ; Inè ; s Mottas^b ; Anne-Kathrin Woischnig ; PhD^c ; Priscilla S. Brunetto ; PhD^a ; Nina Khanna ; PD ; MD^c ; Carole Bourquin ; MD ; PhD^b ; ¹ ; ² ; ^{carole.bourquin@unifr.ch} ; Katharina M. Fromm ; PhD^a ; ¹ ; ^{katharina.fromm@unifr.ch}
• 关键词：Silver nanoparticles ; Silica nanocontainers ; Nanorattles ; Dendritic cells ; Immunoresponse ; Antimicrobial properties
• 刊名：Nanomedicine: Nanotechnology, Biology and Medicine
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：13
• 期：1
• 页码：11-22
• 全文大小：1846 K
• 卷排序：13

文摘

The progression in the use of orthopedic implants has led to an increase in the absolute number of implant infections, triggering a search for more effective antibacterial coatings. Nanorattles have recently gained interest in biomedical applications such as drug delivery, as encapsulation of the cargo inside the hollow structure provides a physical protection from the surrounding environment. Here, silver-containing silica nanorattles (Ag@SiO2) were evaluated for their antimicrobial potential and for their impact on cells of the immune system. We show that Ag@SiO2 nanorattles exhibited a clear antibacterial effect against Escherichia coli as well as Staphylococcus aureus found in post-operative infections. Immunotoxicological analyses showed that the particles were taken up through an active phagocytic process by dendritic cells of the immune system and did not affect their viability nor induce unwanted immunological effects. Silver-containing silica nanorattles thus fulfill several prerequisites for an antibacterial coating on surgical implants.