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Quaternized Curcumin Derivative-Synthesis, Physicochemical Characteristics, and Photocytotoxicity, Including
Pawel Bakun1,2, Marcin Wysocki2,3, Magdalena Stachowiak1
1Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Rokietnicka 3, 60-806 Poznan, Poland.
Molecules (Basel, Switzerland)
|October 16, 2024
Summary
Novel curcumin derivatives show promise for antimicrobial photodynamic therapy (APDT). These compounds effectively reduce bacterial survival, offering a potential new strategy against drug-resistant infections.
Area of Science:
- Medicinal Chemistry
- Photochemistry
- Microbiology
Background:
- Antibiotic resistance is a growing global health threat, necessitating novel therapeutic approaches.
- Antimicrobial photodynamic therapy (APDT) offers a non-specific mechanism to combat resistant bacteria with a low probability of resistance development.
Purpose of the Study:
- To synthesize and characterize novel curcumin derivatives with morpholine motifs for potential APDT applications.
- To evaluate the photophysical properties, toxicity, and antimicrobial efficacy of these derivatives.
Main Methods:
- Synthesis and physicochemical characterization of curcumin derivatives.
- Assessment of photostability, singlet oxygen generation, aggregation, and cytotoxicity (Microtox® assay, MTT assay).
- Photocytotoxicity testing against microbial strains (Candida albicans, Escherichia coli, Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa) using LED light at 470 nm.
Main Results:
- Quaternized curcumin derivatives were synthesized and characterized.
- Compounds demonstrated varying photostability, singlet oxygen generation, and aggregation properties.
- Initial photocytotoxicity studies showed a significant reduction (>5.4 log) in Staphylococcus aureus survival upon treatment with LED light and curcumin derivatives at 10 µM.
Conclusions:
- The synthesized curcumin derivatives possess properties suitable for antimicrobial photodynamic therapy.
- These compounds demonstrate potent photocytotoxicity against Staphylococcus aureus, highlighting their potential as a novel therapeutic agent against bacterial infections.
