1
|
Gottardo B, Zoccal ARM, Maschio-Lima T, Lemes TH, Paziani MH, Von Zeska Kress MR, Perfecto TM, Almeida MTG, Volanti DP. Antifungal Activity of Nontoxic Nanocomposite Based on Silver and Reduced Graphene Oxide against Dermatophytes and Candida spp. ACS Biomater Sci Eng 2023; 9:6870-6879. [PMID: 37943794 DOI: 10.1021/acsbiomaterials.3c00390] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Dermatomycoses are typical hair, skin, or nail infections caused mainly by dermatophytes and nondermatophytes: Trichophyton, Microsporum, Epidermophyton, and Candida. In addition to the esthetical impact, pain, and nail deformity, these mycoses can be a source of severe disease. The high cost of treatment, toxicity, and the emergence of resistant infectious agents justifies research into new drugs. This work evaluates the fungicidal activity of nanocomposites (NCs) based on reduced graphene oxide (rGO) loaded with silver (Ag) nanoparticles (rGO/Ag) against clinical isolates of dermatophytes and Candida species. This is an unprecedented study in which, for the first time, hybrid nanocompounds based on Ag/rGO were tested against Epidermophytom, Microsporum, and Trichophyton species (dermatophytes agents). In this paper, we synthesize rGO using different concentrations of Ag by hydrolysis of metal salt AgNO3 and follow the growth of nanocrystals on sheets of rGO provided by the NaBH4. The NCs were analyzed by X-ray diffraction analysis, and the NC morphology, silver distribution on the rGO surface, and crystalline information were investigated by transmission electron microscopy. Antifungal susceptibility assay was performed by the microdilution method based on modified Clinical and Laboratory Standards Institute (CLSI) protocol. Time-kill kinetics was conducted to monitor the effect of the composite to inhibit fungal cells or promote structural changes, avoiding germination. The toxicological evaluation of the NCs was born in an in vivo model based on Galleria mellonella (G. mellonella). Minimum inhibitory concentration (MIC) values of the rGO/Ag NCs ranged from 1.9 to 125 μg/mL. The best inhibitory activity was obtained for rGO/Ag12%, mainly against Candida spp. and Epidermophyton floccosum. In the presence of sorbitol, MIC values of rGO/Ag NCs were higher (ranging from 15.6 to 250 μg/mL), indicating the action mechanism on the cell wall. Both yeast and dermatophytes clinical isolates were inhibited at a minimum of 6 and 24 h, respectively, but after 2 and 12 h, they had initial antifungal interference. All hybrid formulations of rGO/Ag NCs were not toxic for G. mellonella. This study provides insights into an alternative therapeutic strategy for controlling dermatomycoses.
Collapse
Affiliation(s)
- Bianca Gottardo
- Institute of Biosciences, Humanities, and Exact Sciences, São Paulo State University (UNESP), R. Cristóvão Colombo 2265, São José do Rio Preto, Sao Paulo 15054-000, Brazil
| | - Andreza R M Zoccal
- Institute of Biosciences, Humanities, and Exact Sciences, São Paulo State University (UNESP), R. Cristóvão Colombo 2265, São José do Rio Preto, Sao Paulo 15054-000, Brazil
| | - Taiza Maschio-Lima
- Institute of Biosciences, Humanities, and Exact Sciences, São Paulo State University (UNESP), R. Cristóvão Colombo 2265, São José do Rio Preto, Sao Paulo 15054-000, Brazil
| | - Thiago H Lemes
- Institute of Biosciences, Humanities, and Exact Sciences, São Paulo State University (UNESP), R. Cristóvão Colombo 2265, São José do Rio Preto, Sao Paulo 15054-000, Brazil
| | - Mario H Paziani
- Barão de Mauá University Center (BMUC), Rua. Ramos de Azevedo 423, Ribeirão Preto, Sao Paulo 14090-062, Brazil
| | - Marcia R Von Zeska Kress
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo (USP), Av. do Café s/n, Ribeirão Preto, Sao Paulo 14040-903, Brazil
| | - Tarcísio M Perfecto
- Institute of Biosciences, Humanities, and Exact Sciences, São Paulo State University (UNESP), R. Cristóvão Colombo 2265, São José do Rio Preto, Sao Paulo 15054-000, Brazil
| | - Margarete T G Almeida
- São José do Rio Preto Medical School (FAMERP), Av. Brigadeiro Faria Lima 5416, São José do Rio Preto, Sao Paulo 15090-000, Brazil
| | - Diogo P Volanti
- Institute of Biosciences, Humanities, and Exact Sciences, São Paulo State University (UNESP), R. Cristóvão Colombo 2265, São José do Rio Preto, Sao Paulo 15054-000, Brazil
| |
Collapse
|
2
|
Nascimento E, Vitali LH, Tonani L, Kress MRVZ, Takayanagui OM, Martinez R. Refractory and/or Relapsing Cryptococcosis Associated with Acquired Immune Deficiency Syndrome: Clinical Features, Genotype, and Virulence Factors of Cryptococcus spp. Isolates. Am J Trop Med Hyg 2016; 94:975-81. [PMID: 26928832 DOI: 10.4269/ajtmh.15-0595] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 01/16/2016] [Indexed: 11/07/2022] Open
Abstract
Refractory and relapsing crytocococcosis in acquired immune deficiency syndrome (AIDS) patients have a poor prognosis. The risk factors for this complicated infection course were evaluated by comparing refractory and/or relapsing cryptococcosis in human immunodeficiency virus-coinfected patients (cohort 1) with another group of AIDS patients who adequately responded to antifungals (cohort 2). Except for one isolate of Cryptococcus gattii from a cohort 2 case, all other isolates were identified as Cryptococcus neoformans var. grubii, sex type α, genotype VNI, including Cryptococcus reisolated from the relapse or in the refractory state. No differences were observed with respect to Cryptococcus capsule size and in the melanin and phospholipase production. The cohort 1 patients presented higher prevalence of cryptococcemia, cerebral dissemination, chronic liver disease, and leucopenia, and have increased death rate. Apparently, the refractory and/or relapsing cryptococcosis in the AIDS patients were more related to the host and the extent of the infection than to the fungal characteristics.
Collapse
Affiliation(s)
- Erika Nascimento
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Lucia H Vitali
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Ludmilla Tonani
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Marcia R Von Zeska Kress
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Osvaldo M Takayanagui
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Roberto Martinez
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto, São Paulo, Brazil; Department of Neuroscience and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| |
Collapse
|