Sun Lingmei, Liao Kai, Li Yiping, Zhao Lei, Liang Sai, Guo Dan, Hu Jun, Wang Dayong
J Nanosci Nanotechnol. 2016 Mar;16(3):2325-35. doi: 10.1166/jnn.2016.10934.
In the clinical practice, resistance of Candida albicans to antifungal agents has frequently emerged. Silver-nanoparticles (Ag-NPs) have been demonstrated to have the antifungal property. We investigated the potential for synergy between polyvinylpyrrolidone (PVP)-coated Ag-NPs and azole antifungal, such as fluconazole or voriconazole, against drug-resistant C. albicans strain CA10. When antifungal agent was examined alone, fluconazole and voriconazole did not kill drug-resistant C. albicans, and PVP-coated Ag-NPs had only the moderate killing ability. In contrast, the combinational treatment of PVP-coated Ag-NPs with fluconazole or voriconazole was effective in being against the drug-resistant C. albicans. After the combinational treatment, we detected the disruption of cell membrane integrity, the tendency of PVP-coated Ag-NPs to adhere to cell membrane, and the inhibition of budding process. Moreover, after the combinational treatment, the defects in ergosterol signaling and efflux pump functions were detected. Our results suggest that the combinational use of engineered nanomaterials (ENMs), such as PVP-coated Ag-NPs, with the conventional antifungal may be a viable strategy to combat drug-resistant fungal infection.
在临床实践中,白色念珠菌对抗真菌药物的耐药性频繁出现。银纳米颗粒(Ag-NPs)已被证明具有抗真菌特性。我们研究了聚乙烯吡咯烷酮(PVP)包被的Ag-NPs与唑类抗真菌药(如氟康唑或伏立康唑)联合使用对耐药白色念珠菌菌株CA10的协同作用潜力。单独检测抗真菌药物时,氟康唑和伏立康唑不能杀死耐药白色念珠菌,PVP包被的Ag-NPs仅有中等的杀菌能力。相比之下,PVP包被的Ag-NPs与氟康唑或伏立康唑联合治疗对耐药白色念珠菌有效。联合治疗后,我们检测到细胞膜完整性破坏、PVP包被的Ag-NPs粘附于细胞膜的趋势以及出芽过程受到抑制。此外,联合治疗后,还检测到麦角固醇信号传导和外排泵功能缺陷。我们的结果表明,工程纳米材料(如PVP包被的Ag-NPs)与传统抗真菌药联合使用可能是对抗耐药真菌感染的一种可行策略。