Analysis of the effects of Cu-MOFs on fungal cell inactivation

Mayura Veerana, Hyun Chul Kim, Sarmistha Mitra, Bishwa Chandra Adhikari, Gyungsoon Park, Seong Huh, Sung Jin Kim, Youngmee Kim

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Three dimensional (3D) copper metal organic frameworks (Cu-MOFs) containing glutarates and bipyridyl ligands (bpa = 1,2-bis(4-pyridyl)ethane, bpe = 1,2-bis(4-pyridyl)ethylene, or bpp = 1,3-bis(4-pyridyl)propane) were synthesized by using previously reported hydrothermal reactions or a layering method. All three Cu-MOFs contained well-defined one dimensional (1D) channels with very similar pore shapes and different pore dimensions. The bulk purities of the Cu-MOFs were confirmed using powder X-ray diffraction (PXRD) and infrared spectroscopy (IR) spectra. When the three types of Cu-MOFs were applied to Candida albicans cells and Aspergillus niger spores, an average of about 50-80% inactivation was observed at the highest concentration of Cu-MOFs (2 mg mL-1). The efficiency of the fungal inactivation was not significantly different among the three different types (bpa, bpe, bpp). Treatment of the fungi using Cu-MOFs induced an apoptosis-like death and this was more severe in A. niger than C. albicans. This may be due to elevation of the intracellular level of reactive oxygen species (ROS) in A. niger. Generation of the reactive species in solution by Cu-MOFs was observed. However, there was a dramatic variation in the levels observed among the three types. Our results suggest that Cu-MOFs can produce antifungal effects and induce apoptosis-like death of the fungi, which was probably caused by the elevated level of intracellular reactive species.

Original languageEnglish
Pages (from-to)1057-1065
Number of pages9
JournalRSC Advances
Volume11
Issue number2
DOIs
StatePublished - 5 Dec 2020

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF), which was funded by the Ministry of Education, Science and Technology (2020R1F1A107094211, 2018R1D1A1B07043017, and 2018R1D1A1B07045327).

Publisher Copyright:
© The Royal Society of Chemistry.

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