Curcumin-Functionalized Graphene Oxide Strongly Prevents <i>Candida parapsilosis</i> Adhesion and Biofilm Formation

oleh: Margherita Cacaci, Damiano Squitieri, Valentina Palmieri, Riccardo Torelli, Giordano Perini, Michela Campolo, Maura Di Vito, Massimiliano Papi, Brunella Posteraro, Maurizio Sanguinetti, Francesca Bugli

Format: Article
Diterbitkan: MDPI AG 2023-02-01

Deskripsi

<i>Candida parapsilosis</i> is the major non-<i>C. albicans</i> species involved in the colonization of central venous catheters, causing bloodstream infections. Biofilm formation on medical devices is considered one of the main causes of healthcare-associated infections and represents a global public health problem. In this context, the development of new nanomaterials that exhibit anti-adhesive and anti-biofilm properties for the coating of medical devices is crucial. In this work, we aimed to characterize the antimicrobial activity of two different coated-surfaces, graphene oxide (GO) and curcumin-graphene oxide (GO/CU) for the first time, against <i>C. parapsilosis</i>. We report the capacity of GO to bind and stabilize CU molecules, realizing a homogenous coated surface. We tested the anti-planktonic activity of GO and GO/CU by growth curve analysis and quantification of Reactive Oxigen Species( ROS) production. Then, we tested the antibiofilm activity by adhesion assay, crystal violet assay, and live and dead assay; moreover, the inhibition of the formation of a mature biofilm was investigated by a viability test and the use of specific dyes for the visualization of the cells and the extra-polymeric substances. Our data report that GO/CU has anti-planktonic, anti-adhesive, and anti-biofilm properties, showing a 72% cell viability reduction and a decrease of 85% in the secretion of extra-cellular substances (EPS) after 72 h of incubation. In conclusion, we show that the GO/CU conjugate is a promising material for the development of medical devices that are refractory to microbial colonization, thus leading to a decrease in the impact of biofilm-related infections.