Bioevaluation of Novel Anti-Biofilm Coatings Based on PVP/Fe3O4 Nanostructures and 2-((4-Ethylphenoxy)methyl)-N- (arylcarbamothioyl)benzamides
作者:Carmen Limban、Alexandru Missir、Alexandru Grumezescu、Alexandra Oprea、Valentina Grumezescu、Bogdan Vasile、Gabriel Socol、Roxana Trușcă、Miron Caproiu、Mariana Chifiriuc、Bianca Gălățeanu、Marieta Costache、Laurențiu Morușciag、Grațiela Pîrcălăbioru、Diana Nuță
DOI:10.3390/molecules190812011
日期:——
Novel derivatives were prepared by reaction of aromatic amines with 2-(4-ethylphenoxymethyl)benzoyl isothiocyanate, affording the N-[2-(4-ethylphenoxymethyl) benzoyl]-Nꞌ-(substituted phenyl)thiourea. Structural elucidation of these compounds was performed by IR, NMR spectroscopy and elemental analysis. The new compounds were used in combination with Fe3O4 and polyvinylpyrrolidone (PVP) for the coating of medical surfaces. In our experiments, catheter pieces were coated by Matrix Assisted Pulsed Laser Evaporation (MAPLE) technique. The microbial adherence ability was investigated in 6 multi-well plates by using culture based methods. The obtained surfaces were also assessed for their cytotoxicity with respect to osteoblast cells, by using fluorescence microscopy and MTT assay. The prepared surfaces by advanced laser processing inhibited the adherence and biofilm development ability of Staphylococcus aureus and Pseudomonas aeruginosa tested strains while cytotoxic effects on the 3T3-E1 preosteoblasts embedded in layer shaped alginate hydrogels were not observed. These results suggest that the obtained medical surfaces, based on the novel thiourea derivatives and magnetic nanoparticles with a polymeric shell could represent a promising alternative for the development of new and effective anti-infective strategies.
通过芳香胺与2-(4-乙基苯氧基甲基)苯甲酰异硫氰酸酯的反应制备了新的衍生物,得到N-[2-(4-乙基苯氧基甲基)苯甲酰]-N'-(取代苯基)硫脲。这些化合物的结构通过红外光谱、核磁共振光谱和元素分析进行了解释。新的化合物与Fe3O4和聚乙烯吡咯烷酮(PVP)结合,用于医用表面的涂层。在我们的实验中,采用基质辅助脉冲激光蒸发(MAPLE)技术对导管进行涂层。通过培养基方法在6个多孔板中研究了微生物附着能力。获得的表面还通过荧光显微镜和MTT法评估了其对成骨细胞的细胞毒性。先进激光处理制备的表面抑制了测试菌株金黄色葡萄球菌和铜绿假单胞菌的附着和生物膜形成能力,而对嵌入层状海藻酸钠水凝胶中的3T3-E1成骨前体细胞未观察到细胞毒性影响。结果表明,基于新型硫脲衍生物和聚合物壳层的磁性纳米颗粒获得的医用表面可能成为新型有效抗感染策略发展的有前景的替代方案。