Photodynamic therapy (PDT) is believed to be a potent method for biofilm treatments. However, undesired damage to normal cells may be caused due to the nonselective nature of PDT. Therefore, targeted PDT is preferred on one hand to enhance antimicrobial effects and on the other hand to reduce cytotoxicity to normal cells. For this purpose, novel bacteria-targeted photosensitizer delivery micelles are fabricated, taking advantage of α-cyclodextrin (α-CD)/polyethylene glycol (PEG) supramolecular assembly. Hydrophilic antimicrobial peptide (AMP) Magainin I is covalently bound with PEG, working as a bacterial targeting group as well as the stabilizing shell of the supramolecular micelles. Photosensitizer Chlorin e6 (Ce6) is grafted onto α-CD. The micelles exhibit excellent bacterial targeting effects. Compared to α-CD-Ce6, the supramolecular micelles possess enhanced biofilm killing ability against Gram (-) Pseudomonas aeruginosa biofilms and Gram (+) methicillin-resistant Staphylococcus aureus (MRSA) biofilms while reducing cytotoxicity to NIH/3T3 model cells.
Keyphrases
- photodynamic therapy
- cancer therapy
- drug delivery
- pseudomonas aeruginosa
- staphylococcus aureus
- methicillin resistant staphylococcus aureus
- induced apoptosis
- candida albicans
- fluorescence imaging
- cell cycle arrest
- energy transfer
- drug release
- biofilm formation
- cell death
- oxidative stress
- gram negative
- mass spectrometry
- water soluble
- ionic liquid
- cell proliferation
- signaling pathway
- high resolution
- drug resistant
- liquid chromatography
- quantum dots