Inhibition of bacterial growth through LED (light-emitting diode) 465 and 630 nm: in vitro

Assunção, Flávia Fernanda de Oliveira; Nascimento, Érika; Chaves, Lucas; Silva, Alessandro Márcio Hakme da; Martínez, Roberto; Guirro, Rinaldo Roberto de Jesus

doi:10.1007/s10103-022-03505-3

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…Previous studies have demonstrated that LED light at wavelengths of 465‐ and 630‐nm can inhibit bacterial growth or inactivate bacterial pathogens effectively at high power levels or close exposure to the pathogens. [ 44 ] Therefore, these two wavelengths were chosen as desired SPR emissions to be excited at the interface between the nanostructured surfaces and the bacterial suspension. Therefore, the pitch values of the nanostructured CSRGs and the metasurface were calculated using Equation in a way that they produce SPR emission peaks at 465 and 630 nm at their interface with the E. coli suspension ( n d = 1.3385).…”

Section: Resultsmentioning

confidence: 99%

Learning from Nature: Fighting Pathogenic Escherichia coli Bacteria Using Nanoplasmonic Metasurfaces

Smith

Mazloumi

Karperien

et al. 2023

Adv Materials Inter

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Bioinspired nanoplasmonic 3D crossed surface relief gratings and metasurfaces are fabricated on azobenzene molecular glass thin films to create effective antibacterial surfaces. A synergetic mechanical and photothermal interaction at the interface between the nanostructures and the Escherichia coli (E. coli) bacteria results in a significant decrease in the viable bacterial population. In particular, combined exposure to the interfacial nanospikes as well as the evanescent blue and red electromagnetic fields induced by the nanoplasmonic metasurface, results in a 97% reduction of the viable E. coli in only 25 min, when illuminated with a low-power white light. IntroductionAntibiotics can be regarded as a lifesaving marvel for humanity since the discovery of penicillin in 1928. However, overuse of antibiotics around the world has resulted in bacterial resistance, leading to an estimated 700 000 deaths per year which could increase to ≈10 million deaths annually by 2050 with a potential cost of up to 100 trillion USD. [1] To combat this important problem and to reduce antibiotic use, scientists are exploring alternative options. One way is to learn from nature.Many natural examples, such as lotus leaves, [2] shark skin, [3] cicada wings, [4] and flower petals [5] have been shown to possess antibacterial and self-cleaning surfaces. Researchers have tried to learn from nature and replicate these natural surface structures to affect pathogens through physical and chemical interactions. [6] One method is to create bioinspired antibacterial

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Section: Resultsmentioning

confidence: 99%

Learning from Nature: Fighting Pathogenic Escherichia coli Bacteria Using Nanoplasmonic Metasurfaces

Smith

Mazloumi

Karperien

et al. 2023

Adv Materials Inter

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“…Te bactericidal efect of blue light-emitting diode irradiation depends on the strains and conditions of bacterial inoculation; however, wavelengths of 425 and 525 nm have a bactericidal efect [47]. Similarly, de Oliveira Assunção et al investigated the efect of wavelengths and energy densities of light-emitting diode irradiation, ranging from the blue (465 nm) to the red spectrum (630 nm), which could suppress the growth of various bacteria, such as Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli [48].…”

Section: Discussionmentioning

confidence: 99%

A Novel, Hand‐Held, and Low‐Level Light Therapy Device for the Treatment of Acne Vulgaris: A Single‐Arm, Prospective Clinical Study

Chung

Son

Eun

et al. 2023

Dermatologic Therapy

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There is an increasing demand for low-level light therapy devices for the treatment of dermatologic conditions, such as acne, hair loss, undesirable body hair, and skin aging. This study evaluated the safety and effectiveness of a novel hand-held low-level light therapy device with a 680 nm red laser diode and a 450 nm blue light-emitting diode for the treatment of mild-to-moderate acne. A prospective clinical study was conducted on 57 patients with mild-to-moderate acne and Fitzpatrick skin types II–IV. Treatments were self-administered by the patients at home daily for 4 weeks. Conventional treatment was restricted during the study period. The number of inflammatory and noninflammatory lesion counts, Investigator’s Global Assessment grade, patients’ self-assessment, and adverse events were measured every two weeks, and follow-ups were performed until four weeks after the final treatment. Moreover, we evaluated the bactericidal effect of low-level light therapy on Cutibacterium acnes, a causative agent of acne vulgaris, in vitro. The mean number of inflammatory acne lesions decreased statistically at weeks 4 ( ∗ ∗ ∗ p < 0.001 ) and 8 ( ∗ ∗ ∗ p < 0.001 ). The proportion of Investigator’s Global Assessment grade 3, indicating moderate acne severity, decreased significantly at the final visit. No severe adverse reactions were reported. Furthermore, there was a significant reduction in the viability of Cutibacterium acnes following low-level light therapy exposure in vitro. The results of this study demonstrate that this novel, hand-held, and low-level light therapy device are safe and effective for the treatment of inflammatory acne, with good adherence.

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The Parameters Affecting Antimicrobial Efficiency of Antimicrobial Blue Light Therapy: A Review and Prospect

et al. 2023

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Antimicrobial blue light (aBL) therapy is a novel non-antibiotic antimicrobial approach which works by generating reactive oxygen species. It has shown excellent antimicrobial ability to various microbial pathogens in many studies. However, due to the variability of aBL parameters (e.g., wavelength, dose), there are differences in the antimicrobial effect across different studies, which makes it difficult to form treatment plans for clinical and industrial application. In this review, we summarize research on aBL from the last six years to provide suggestions for clinical and industrial settings. Furthermore, we discuss the damage mechanism and protection mechanism of aBL therapy, and provide a prospect about valuable research fields related to aBL therapy.

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Inhibition of bacterial growth through LED (light-emitting diode) 465 and 630 nm: in vitro

Cited by 3 publications

References 46 publications

Learning from Nature: Fighting Pathogenic Escherichia coli Bacteria Using Nanoplasmonic Metasurfaces

Learning from Nature: Fighting Pathogenic Escherichia coli Bacteria Using Nanoplasmonic Metasurfaces

A Novel, Hand‐Held, and Low‐Level Light Therapy Device for the Treatment of Acne Vulgaris: A Single‐Arm, Prospective Clinical Study

The Parameters Affecting Antimicrobial Efficiency of Antimicrobial Blue Light Therapy: A Review and Prospect

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