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Almeida NLM, Peralta LCF, Pontes FML, Rinaldo D, Porto VC, Lara VS. Anti-Candida activity and biocompatibility of silver nanoparticles associated with denture glaze: a new approach to the management of denture stomatitis. Folia Microbiol (Praha) 2024:10.1007/s12223-024-01161-4. [PMID: 38652435 DOI: 10.1007/s12223-024-01161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 03/26/2024] [Indexed: 04/25/2024]
Abstract
The association of silver nanoparticles (AgNps) to sealant agent Palaseal® can be a promising alternative for complete denture wearers who may develop denture stomatitis (DS). The study aimed to evaluate the anti-Candida and biocompatible potential of silver nanoparticles synthesized by three routes associated with denture glaze to prevent and/or treat oral candidiasis. Surface acrylic resin specimens were treated with different associations of glaze with AgNps (VER+AgUV, VER+AgTurk and VER+AgGm). As controls, specimens were treated with glaze+nystatin (VER+Nyst), glaze only (VER) or submerged in PBS (PBS). Afterwards, Candida albicans biofilm was developed for 24 h, 15 d and 30 d. Subsequently, the biofilm was quantified by CFU/mL, XTT assay and confocal laser scanning microscopy. Fibroblasts were submitted to conditioned medium with the same associations for 24, 48 and 72 h and LIVE/DEAD® viability test was carried out. Regardless of the period, there was a significant reduction (p < 0.01) of viable fungal cells load, as well as inhibition of fungal metabolic activity, in specimens treated with glaze+AgNps associations, compared to VER and PBS. The anti-Candida effects of the associations were similar to the VER+Nyst group, with emphasis on VER+AgGm, which showed the highest percentage values of non-viable fungal cells maintained over time. The associations did not prove toxicity to fibroblasts. The AgNps exerted antimicrobial activity against C. albicans biofilms and are biocompatible. The most effective results were achieved with the association of glaze+silver nanoparticles synthesized by the green chemistry method (AgGm), proving to be an innovative alternative in the management of DS.
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Affiliation(s)
- Nara Lígia Martins Almeida
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, 17012-901, Brazil
| | - Laura Catalí Ferreira Peralta
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru 17012-901, Brazil
| | | | - Daniel Rinaldo
- Department of Chemistry, São Paulo State University (UNESP), Bauru 17033-360, Brazil
| | - Vinicius Carvalho Porto
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru 17012-901, Brazil
| | - Vanessa Soares Lara
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, 17012-901, Brazil.
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Singh G, Narang RK. Polymeric micelle gel with luliconazole: in vivo efficacy against cutaneous candidiasis in Wistar rats. Naunyn Schmiedebergs Arch Pharmacol 2024:10.1007/s00210-024-03090-y. [PMID: 38625553 DOI: 10.1007/s00210-024-03090-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 04/08/2024] [Indexed: 04/17/2024]
Abstract
The objective of this research was focused on the design and development of luliconazole-loaded polymeric micelle hydrogel (LUL-PM-CHG) using quality by design (QbD) principle to improve the penetration and retention of LUL in the skin. The optimization of the formulation involved the utilization of a Box-Behnken design with three factors and three levels. The impact of specific formulation variables, namely the ratio of poloxamer P123 and F127, sonication time, and the quantity of drug, was investigated in terms of particle size, micellar incorporation efficiency, and polydispersity index. The LUL-loaded P123/F127 mixed micelles involved the thin film hydration method for thin preparation. The characteristics of optimized formulation include a particle size of 226 ± 8.52 nm, a polydispersity index (PDI) of 0.153 ± 0.002, a zeta potential (ZP) of 30.15 ± 2.32 mV, and a micellar incorporation efficiency (MIE) of 88.38 ± 3.84%. In vitro release studies indicated a sustained release of LUL-PM-CHG for a duration of up to 8 h. The MIC, GI50, and GI90 of different formulations on Candida albicans were determined using both the microtiter broth dilution method and the plate method and showed that LUL-PM-CHG exhibited the highest antifungal activity compared to the other formulations, with MIC values of 3.25 ± 0.19 ng/mL, GI50 values of 37.11 ± 2.89, and GI90 values of 94.98 ± 3.41 The study also measured the % of inhibition activity and the generation of intracellular reactive oxygen species (ROS) using flow cytometry. LUL-PM-CHG showed the highest percentage of inhibition (75.5%) and ROS production (MFI-140951), indicating its enhanced activity compared to LUL-CHG and LUL. Fungal infection was induced in Wistar rats using immunosuppressant's treatment followed by exposure to C. albicans. Finally, in vivo fungal scaling and histopathological studies indicated a reduction in fungal infection in Wistar rat skin after treatment. The obtained results suggested that LUL-PM can serve as a promising formulation to enhance luliconazole antifungal activity and increase patient compliance.
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Affiliation(s)
- Gurmeet Singh
- I.K. Gujral Punjab Technical University, Kapurthala, Punjab, India.
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, Punjab, India.
| | - Raj Kumar Narang
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, Punjab, India
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Marangos M, Ioannou P, Senn L, Spiliopoulou A, Tzalis S, Kolonitsiou F, Valta M, Kokkini S, Pagani JL, Stafylaki D, Paliogianni F, Fligou F, Kofteridis DP, Lamoth F, Papadimitriou-Olivgeris M. Role of source control in critically ill candidemic patients: a multicenter retrospective study. Infection 2024:10.1007/s15010-024-02222-z. [PMID: 38472708 DOI: 10.1007/s15010-024-02222-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024]
Abstract
PURPOSE Candidemia is associated with high mortality especially in critically ill patients. Our aim was to identify predictors of mortality among critically ill patients with candidemia with a focus on early interventions that can improve prognosis. METHODS Multicenter retrospective study. SETTING This retrospective study was conducted in Intensive Care Units from three European university hospitals from 2015 to 2021. Adult patients with at least one positive blood culture for Candida spp. were included. Patients who did not require source control were excluded. Primary outcome was 14-day mortality. RESULTS A total of 409 episodes of candidemia were included. Most candidemias were catheter related (173; 41%), followed by unknown origin (170; 40%). Septic shock developed in 43% episodes. Overall, 14-day mortality rate was 29%. In Cox proportional hazards regression model, septic shock (P 0.001; HR 2.20, CI 1.38-3.50), SOFA score ≥ 10 points (P 0.008; HR 1.83, CI 1.18-2.86), and prior SARS-CoV-2 infection (P 0.003; HR 1.87, CI 1.23-2.85) were associated with 14-day mortality, while combined early appropriate antifungal treatment and source control (P < 0.001; HR 0.15, CI 0.08-0.28), and early source control without appropriate antifungal treatment (P < 0.001; HR 0.23, CI 0.12-0.47) were associated with better survival compared to those without neither early appropriate antifungal treatment nor source control. CONCLUSION Early source control was associated with better outcome among candidemic critically ill patients.
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Affiliation(s)
- Markos Marangos
- Division of Infectious Diseases, University General Hospital of Patras, Patras, Greece
| | - Petros Ioannou
- Department of Internal Medicine, University General Hospital of Heraklion, Heraklion, Greece
| | - Laurence Senn
- Infectious Diseases Service, Lausanne University Hospital and University of Lausanne, 1011, Lausanne, Switzerland
| | | | - Sotiris Tzalis
- Department of Internal Medicine, University General Hospital of Heraklion, Heraklion, Greece
| | - Fevronia Kolonitsiou
- Department of Microbiology, University General Hospital of Patras, Patras, Greece
| | - Maria Valta
- Division of Anaesthesiology and Intensive Care Medicine, University General Hospital of Patras, Patras, Greece
| | - Sofia Kokkini
- Department of Intensive Care Medicine, University General Hospital of Heraklion, Heraklion, Greece
| | - Jean-Luc Pagani
- Department of Adult Intensive Care Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Dimitra Stafylaki
- Department of Clinical Microbiology and Microbial Pathogenesis, University Hospital of Heraklion, Heraklion, Crete, Greece
| | - Fotini Paliogianni
- Department of Microbiology, University General Hospital of Patras, Patras, Greece
| | - Fotini Fligou
- Division of Anaesthesiology and Intensive Care Medicine, University General Hospital of Patras, Patras, Greece
| | - Diamantis P Kofteridis
- Department of Internal Medicine, University General Hospital of Heraklion, Heraklion, Greece
| | - Frédéric Lamoth
- Infectious Diseases Service, Lausanne University Hospital and University of Lausanne, 1011, Lausanne, Switzerland
- Institute of Microbiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Matthaios Papadimitriou-Olivgeris
- Infectious Diseases Service, Lausanne University Hospital and University of Lausanne, 1011, Lausanne, Switzerland.
- Infectious Diseases Service, Cantonal Hospital of Sion and Institut Central des Hôpitaux (ICH), Sion, Switzerland.
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