The synergistic effects of gamma-aminobutyric acid silver nanoparticles and light in antimicrobial photodynamic inactivation

Isabela Santos Lopes; Vitor Gonçalves Vital; Suzan Vasconclellos Pantarotto; Lilia Coronato Courrol

doi:10.1117/12.3017632

10 June 2024 The synergistic effects of gamma-aminobutyric acid silver nanoparticles and light in antimicrobial photodynamic inactivation

Isabela Santos Lopes, Vitor Gonçalves Vital, Suzan Vasconclellos Pantarotto, Lilia Coronato Courrol

Author Affiliations +

Proceedings Volume 12991, Nanophotonics X; 129910T (2024) https://doi.org/10.1117/12.3017632
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The relentless rise of Multidrug-Resistant (MDR) bacteria significantly challenges global health, undermining the effectiveness of traditional antibiotics and demanding prompt development of new antimicrobial strategies. This study investigates the antimicrobial properties of Gamma-Aminobutyric Acid (GABA) silver nanoparticles (GABAAgNPs). GABAAgNPs were synthesized via photoreduction and subsequently characterized using UV-Vis spectroscopy, Transmission Electron Microscopy (TEM), and Zeta potential analysis. Their antimicrobial potential was assessed through a Minimum Inhibitory Concentration (MIC) assay. The photodynamic effect was studied under irradiation at the following wavelengths: 460 +/- 10 nm (2 min), 590 nm +/- 10 nm (2 min), and 660 nm +/- 10 nm for 2, 5, and 10 minutes. Our results demonstrated that GABAAgNPs induced porphyrin formation in E. coli, leading to microbial inhibition, further enhanced through the photodynamic effect. Thus, GABAAgNPs display dual functionality: directly targeting microbes while concurrently acting as photosensitizers in antimicrobial photodynamic inactivation (aPDI).

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Isabela Santos Lopes, Vitor Gonçalves Vital, Suzan Vasconclellos Pantarotto, and Lilia Coronato Courrol "The synergistic effects of gamma-aminobutyric acid silver nanoparticles and light in antimicrobial photodynamic inactivation", Proc. SPIE 12991, Nanophotonics X, 129910T (10 June 2024); https://doi.org/10.1117/12.3017632

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