Robust copper metal–organic framework-embedded polysiloxanes for biomedical applications: Its antibacterial effects on MRSA and in vitro cytotoxicity

Kihak Gwon, Youngmee Kim, Hyunjun Cho, Seonhwa Lee, So Hyeon Yang, Sung Jin Kim, Do Nam Lee

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Polysiloxanes (PSs) have been widely utilized in the industry as lubricants, varnishes, paints, release agents, adhesives, and insulators. In addition, their applications have been expanded to include the development of new biomedical materials. To modify PS for application in therapeutic purposes, a flexible antibacterial Cu-MOF (metal–organic framework) consisting of glutarate and 1,2bis(4-pyridyl)ethane ligands was embedded in PS via a hydrosilylation reaction of vinyl-terminated and H-terminated PSs at 25C. The bactericidal activities of the resulting Cu-MOF-embedded PS (PS@Cu-MOF) and the control polymer (PS) were tested against Escherichia coli, Staphylococcus aureus, and methicillin-resistant Staphylococcus aureus. PS@Cu-MOF exhibited more than 80% bactericidal activity toward the tested bacteria at a concentration of 100 µg·mL−1 and exhibited a negligible cytotoxicity toward mouse embryonic fibroblasts at the same concentration. Release tests of the Cu(II) ion showed PS@Cu-MOF to be particularly stable in a phosphate-buffered saline solution. Furthermore, its physical and thermal properties, including the phase transition, rheological measurements, swelling ratio, and thermogravimetric profile loss, were similar to those of the control polymer. Moreover, the low cytotoxicity and bactericidal activities of PS@Cu-MOF render it a promising candidate for use in medicinal applications, such as in implants, skin-disease treatment, wound healing, and drug delivery.

Original languageEnglish
Article number719
Pages (from-to)1-13
Number of pages13
JournalNanomaterials
Volume11
Issue number3
DOIs
StatePublished - Mar 2021

Keywords

  • Antibacterial agent
  • Biomedical application
  • Cu-MOF
  • Cytocompatibility
  • Hydrosilylation
  • Polysiloxane (PS)

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