Homeyer Katie H, Goudie Marcus J, Singha Priyadarshini, Handa Hitesh
School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, United States.
ACS Biomater Sci Eng. 2019 Apr 8;5(4):2021-2029. doi: 10.1021/acsbiomaterials.8b01320. Epub 2019 Mar 8.
Urinary catheterization is one of the most common medical procedures that makes a patient susceptible to infection due to biofilm formation on the urinary catheter. Catheter associated urinary tract infections (CAUTIs) are responsible for over 1 million cases in the United States alone and cost the healthcare industry more than $350 million every year. This work presents a liquid-infused nitric-oxide-releasing (LINORel) urinary catheter fabricated by incorporating the nitric oxide (NO) donor -nitroso-acetylpenicillamine (SNAP) and silicone oil into commercial silicone Foley catheters through a two-stage swelling process. This synergistic combination improves NO-releasing materials by providing minimal SNAP leaching and a more controlled release of NO while incorporating the nonfouling characteristics of liquid-infused materials. The LINORel urinary catheter was successful in sustaining a controlled NO release over a 60 day period under physiological conditions with minimal SNAP leaching during the initial 24 h period, 0.49 ± 0.0061%. The LINORel-UC proved successful in reducing bacterial adhesion and biofilm formation for Gram positive (98.49 ± 2.06%) over a 7 day period in a drip flow bioreactor environment. Overall, this study presents a desirable combination that incorporates the antifouling advantages of liquid-infused materials with the active release of a bactericidal agent, an uncharted territory in aiding to prevent the risk of CAUTIs.
导尿术是最常见的医疗程序之一,由于导尿管上形成生物膜,会使患者易受感染。仅在美国,导尿管相关尿路感染(CAUTIs)就导致超过100万例病例,每年给医疗行业造成超过3.5亿美元的损失。这项工作展示了一种注入液体并释放一氧化氮(LINORel)的导尿管,它是通过两阶段溶胀过程将一氧化氮(NO)供体——亚硝基乙酰青霉胺(SNAP)和硅油加入商用硅胶Foley导尿管中制成的。这种协同组合通过使SNAP的浸出量最小化并更可控地释放NO,同时融入注入液体材料的防污特性,改进了NO释放材料。LINORel导尿管在生理条件下成功维持了60天的可控NO释放,在最初24小时内SNAP浸出量最小,为0.49±0.0061%。在滴流生物反应器环境中,LINORel导尿管在7天内成功减少了革兰氏阳性菌(98.49±2.06%)的细菌粘附和生物膜形成。总体而言,本研究提出了一种理想的组合,将注入液体材料的防污优势与杀菌剂的主动释放相结合,这在帮助预防CAUTIs风险方面是一个未知领域。