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Vapor-Phase of Essential Oils as a Promising Solution to Prevent Candida Vaginal Biofilms Caused by Antifungal Resistant Strains. Healthcare (Basel) 2022; 10:healthcare10091649. [PMID: 36141261 PMCID: PMC9498542 DOI: 10.3390/healthcare10091649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/29/2022] Open
Abstract
Background: Vulvovaginal candidiasis (VVC) is a disease with high incidence, a huge impact on the quality of life and health of women, and which represents a great challenge to treat. The growing need to apply antifungal intensive therapies have contributed to an emergence of drug-resistant Candida strains. Thus, effective therapeutic options, to meet the antifungal-resistance challenge and to control high resilient biofilms, are urgently needed. This study aimed to investigate the antifungal activity of essentials oils (EOs) on drug-resistant Candida vaginal isolates. Method: Therefore, the antimicrobial effect of tea tree, niaouli, white thyme, and cajeput EOs on the planktonic growth of Candida isolates was initially evaluated by an agar disc diffusion method. Then, the vapor-phase effect of tea tree EO (VP-TTEO) on biofilm formation and on pre-formed biofilms was evaluated by crystal violet staining, XTT reduction assay, colony forming units’ enumeration, and scanning electron microscopy. Results: The results revealed high antifungal activity of EOs against drug-resistant Candida isolates. Additionally, the VP-TTEO showed a significant inhibitory effect on the biofilm formation of all tested isolates and was able to provoke an expressive reduction in mature Candida albicans biofilms. Conclusions: Overall, this study suggests that the VP-EO may be a promising solution that is able to prevent biofilm-related VVC caused by antifungal-resistant strains.
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Kaskatepe B, Aslan Erdem S, Ozturk S, Safi Oz Z, Subasi E, Koyuncu M, Vlainić J, Kosalec I. Antifungal and Anti-Virulent Activity of Origanum majorana L. Essential Oil on Candida albicans and In Vivo Toxicity in the Galleria mellonella Larval Model. Molecules 2022; 27:molecules27030663. [PMID: 35163928 PMCID: PMC8838586 DOI: 10.3390/molecules27030663] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/12/2022] [Accepted: 01/18/2022] [Indexed: 02/06/2023] Open
Abstract
The aim of this study was to investigate and compare in detail both the antifungal activity in vitro (with planktonic and biofilm-forming cells) and the essential oil composition (EOs) of naturally growing (OMN) and cultivated (OMC) samples of Origanum majorana L. (marjoram). The essential oil composition was analyzed using GC-MS. The major constituent of both EOs was carvacrol: 75.3% and 84%, respectively. Both essential oils showed high antifungal activity against clinically relevant Candida spp. with IC50 and IC90 less than or equal to 0.5 µg mL−1 and inhibition of biofilm with a concentration of 3.5 µg mL−1 or less. Cultivated marjoram oil showed higher anti-biofilm activity against C. albicans. In addition, OMC showed greater inhibition of germ-tube formation (inhibition by 83% in Spider media), the major virulence factor of C. albicans at a concentration of 0.125 µg mL−1. Both EOs modulated cell surface hydrophobicity (CSH), but OMN proved to be more active with a CSH% up to 58.41%. The efficacy of O. majorana EOs was also investigated using Galleria mellonella larvae as a model. It was observed that while the larvae of the control group infected with C. albicans (6.0 × 108 cells) and not receiving treatment died in the controls carried out after 24 h, all larvae in the infected treatment group survived at the end of the 96th hour. When the treatment group and the infected group were evaluated in terms of vital activities, it was found that the difference was statistically significant (p < 0.001). The infection of larvae with C. albicans and the effects of O. majorana EOs on the hemocytes of the model organism and the blastospores of C. albicans were evaluated by light microscopy on slides stained with Giemsa. Cytological examination in the treatment group revealed that C. albicans blastospores were phagocytosed and morphological changes occurred in hemocytes. Our results indicated that the essential oil of both samples showed strong antifungal activities against planktonic and biofilm-forming C. albicans cells and also had an influence on putative virulence factors (germ-tube formation and its length and on CSH).
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Affiliation(s)
- Banu Kaskatepe
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ankara University, Ankara 06560, Turkey;
| | - Sinem Aslan Erdem
- Department of Pharmacognosy, Faculty of Pharmacy, Ankara University, Ankara 06560, Turkey;
| | - Sukran Ozturk
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Zonguldak Bulent Ecevit University, Zonguldak 67100, Turkey;
| | - Zehra Safi Oz
- Department of Medical Biology, Faculty of Medicine, Zonguldak Bulent Ecevit University, Zonguldak 67100, Turkey;
| | - Eldan Subasi
- Microbiology Laboratory of Application and Research Hospital, Zonguldak Bulent Ecevit University, Zonguldak 67100, Turkey;
| | - Mehmet Koyuncu
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Cyprus International University, Lefkosa 99258, Turkey;
| | | | - Ivan Kosalec
- Faculty of Pharmacy and Biochemistry, Institute for Microbiology, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence: ; Tel.: +385-1639-4492
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Kašparová P, Zmuda M, Vaňková E, Maťátková O, Masák J. Low-molecular weight chitosan enhances antibacterial effect of antibiotics and permeabilizes cytoplasmic membrane of Staphylococcus epidermidis biofilm cells. Folia Microbiol (Praha) 2021; 66:983-996. [PMID: 34291404 DOI: 10.1007/s12223-021-00898-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 07/01/2021] [Indexed: 11/25/2022]
Abstract
This study evaluated the effect of low-molecular weight chitosan on Staphylococcus epidermidis, a common colonizer of joint implants and other prosthetic devices. We have also attempted to elucidate its mechanism of action. Chitosan was found to be effective against both the planktonic and biofilm cells (MIC80 35-40 mg/L; MBIC80 40-150 mg/L), in contrast to the antibiotics erythromycin and tetracycline with no antibiofilm activity (MBIC80 not found). In combination, chitosan had an additive effect with antibiotics on suspension growth of S. epidermidis (FICi 0.7-1.0), and the combinatory action caused a complete inhibition of biofilm metabolic activity in some cases. In addition, chitosan caused rapid cellular damage and enhanced antihaemolytic activity of tetracycline in combination towards S. epidermidis biofilm cells. Chitosan efficiently inhibited S. epidermidis growth acting via cell membrane damage, yet the extent of antimicrobial and antibiofilm activities was quite strain-specific. It was proved to be a very efficient antimicrobial agent worth further examination as a potent candidate in pharmaceutical research. Apart from antimicrobial activity, it also acted as antivirulence enhancing agent which is a very promising strategy for alternative infectious diseases treatment.
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Affiliation(s)
- Petra Kašparová
- Department of Biotechnology, University of Chemistry and Technology in Prague, Technická 5, Prague 6 - Dejvice 166 28, Prague, Czech Republic.
| | - Martin Zmuda
- Department of Biotechnology, University of Chemistry and Technology in Prague, Technická 5, Prague 6 - Dejvice 166 28, Prague, Czech Republic
| | - Eva Vaňková
- Department of Biotechnology, University of Chemistry and Technology in Prague, Technická 5, Prague 6 - Dejvice 166 28, Prague, Czech Republic
| | - Olga Maťátková
- Department of Biotechnology, University of Chemistry and Technology in Prague, Technická 5, Prague 6 - Dejvice 166 28, Prague, Czech Republic
| | - Jan Masák
- Department of Biotechnology, University of Chemistry and Technology in Prague, Technická 5, Prague 6 - Dejvice 166 28, Prague, Czech Republic
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Miao Y, Xia Y, Kong Y, Zhu H, Mei H, Li P, Feng H, Xun W, Xu Z, Zhang N, Liu D, Shen Q, Zhang R. Overcoming diverse homologous recombinations and single chimeric guide RNA competitive inhibition enhances Cas9-based cyclical multiple genes coediting in filamentous fungi. Environ Microbiol 2021; 23:2937-2954. [PMID: 33754479 DOI: 10.1111/1462-2920.15477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 03/18/2021] [Indexed: 12/26/2022]
Abstract
Deciphering the complex cellular behaviours and advancing the biotechnology applications of filamentous fungi increase the requirement for genetically manipulating a large number of target genes. The current strategies cannot cyclically coedit multiple genes simultaneously. In this study, we firstly revealed the existence of diverse homologous recombination (HR) types in marker-free editing of filamentous fungi, and then, demonstrated that sgRNA efficiency-mediated competitive inhibition resulted in the low integration of multiple genetic sites during coediting, which are the two major obstacles to limit the efficiency of cyclically coediting of multiple genes. To overcome these obstacles, we developed a biased cutting strategy by Cas9 to greatly enhance the desired HR type and applied a new selection marker labelling strategy for multiple donor DNAs, in which only the donor DNA with the lowest sgRNA efficiency was labelled. Combined with these strategies, we successfully developed a convenient method for cyclically coediting multiple genes in different filamentous fungi. In addition, diverse HRs resulted in a useful and convenient one-step approach for gene functional study combining both gene disruption and complementation. This research provided both a useful one-step approach for gene functional study and an efficient strategy for cyclically coediting multiple genes in filamentous fungi.
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Affiliation(s)
- Youzhi Miao
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yanwei Xia
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yanqiong Kong
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Han Zhu
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Huiling Mei
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Pan Li
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Haichao Feng
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weibing Xun
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhihui Xu
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Nan Zhang
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Dongyang Liu
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qirong Shen
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ruifu Zhang
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
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Alonso GC, Klein MI, Jordão CC, Carmello JC, Pavarina AC. Gene expression of Candida albicans strains isolates from patients with denture stomatitis submitted to treatments with photodynamic therapy and nystatin. Photodiagnosis Photodyn Ther 2021; 35:102292. [PMID: 33857598 DOI: 10.1016/j.pdpdt.2021.102292] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 12/19/2022]
Abstract
The study evaluated the effect of antimicrobial photodynamic therapy (aPDT) and nystatin (NYS) in the expression of genes (ACT1, ALS1, CAP1, CAT1, EFG1, HWP1, LIP3, PLB1, SAP1, and SOD1) involved in the virulence of Candida albicans strains recovered from patients with denture stomatitis (DS). These strains were isolated from the patients before (initial) and after treatment (final), and 45 days after the treatments (follow-up). For gene expression analyses, RNA was isolated from the clinical strains, followed by cDNA synthesis and qPCR using specific primers for each target gene. The samples that present integrity were pooled to increase the RNA yield. In the end, four patients treated with aPDT and five patients treated with NYS had the clinical isolates of C. albicans submitted to gene expression evaluation. The data demonstrated a statistical difference in the expression of PLB1 and ACT1 for the different therapies (aPDT versus NYS). Also, there was a statistical difference in the expression of CAT1, SOD1, and LIP3 at the time intervals assessed (initial, final, and follow-up). In contrast, no statistical difference was found in the expression of ALS1, HWP1, EFG1, CAP1, CAT1, SOD1, LIP3, and SAP1 between the therapies, while no significant difference was detected at the time intervals evaluated for ALS1, HWP1, EFG1, CAP1, and SAP1. Therefore, the topical treatments for DS with aPDT or NYS did not effect the expression of most C. albicans virulence genes evaluated.
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Affiliation(s)
- Gabriela Caroline Alonso
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - UNESP, Rua Humaitá, 1680, 14801-903, Araraquara, SP, Brazil
| | - Marlise Inêz Klein
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - UNESP, Rua Humaitá, 1680, 14801-903, Araraquara, SP, Brazil
| | - Cláudia Carolina Jordão
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - UNESP, Rua Humaitá, 1680, 14801-903, Araraquara, SP, Brazil
| | - Juliana Cabrini Carmello
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - UNESP, Rua Humaitá, 1680, 14801-903, Araraquara, SP, Brazil
| | - Ana Cláudia Pavarina
- Department of Dental Materials and Prosthodontics, School of Dentistry at Araraquara, Univ Estadual Paulista - UNESP, Rua Humaitá, 1680, 14801-903, Araraquara, SP, Brazil.
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Valand N, Girija UV. Candida Pathogenicity and Interplay with the Immune System. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1313:241-272. [PMID: 34661898 DOI: 10.1007/978-3-030-67452-6_11] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Candida species are opportunistic fungal pathogens that are part of the normal skin and mucosal microflora. Overgrowth of Candida can cause infections such as thrush or life-threatening invasive candidiasis in immunocompromised patients. Though Candida albicans is highly prevalent, several non-albicans species are also isolated from nosocomial infections. Candida sp. are over presented in the gut of people with Crohn's disease and certain types of neurological disorders, with hyphal form and biofilms being the most virulent states. In addition, Candida uses several secreted and cell surface molecules such as pH related antigen 1, High affinity glucose transporter, Phosphoglycerate mutase 1 and lipases to establish pathogenicity. A strong innate immune response is elicited against Candida via dendritic cells, neutrophils and macrophages. All three complement pathways are also activated. Production of proinflammatory cytokines IL-10 and IL-12 signal differentiation of CD4+ cells into Th1 and Th2 cells, whereas IL-6, IL-17 and IL-23 induce Th17 cells. Importance of T-lymphocytes is reflected in depleted T-cell count patients being more prone to Candidiasis. Anti- Candida antibodies also play a role against candidiasis using various mechanisms such as targeting virulent enzymes and exhibiting direct candidacidal activity. However, the significance of antibody response during infection remains controversial. Furthermore, some of the Candida strains have evolved molecular strategies to evade the sophisticated host attack by proteolysis of components of immune system and interfering with immune signalling pathways. Emergence of several non-albicans species that are resistant to current antifungal agents makes treatment more difficult. Therefore, deeper insight into interactions between Candida and the host immune system is required for discovery of novel therapeutic options.
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Affiliation(s)
- Nisha Valand
- Leicester School of Allied Health and Life sciences, Faculty of Health and Life Sciences, De Montfort University, Leicester, UK
| | - Umakhanth Venkatraman Girija
- Leicester School of Allied Health and Life sciences, Faculty of Health and Life Sciences, De Montfort University, Leicester, UK.
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Valle Arevalo A, Nobile CJ. Interactions of microorganisms with host mucins: a focus on Candida albicans. FEMS Microbiol Rev 2020; 44:645-654. [PMID: 32627827 PMCID: PMC7476774 DOI: 10.1093/femsre/fuaa027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 07/02/2020] [Indexed: 02/06/2023] Open
Abstract
Mucus is an important host innate defense factor that lines most epithelial cell layers of the body and provides crucial physical and biological protection against pathogenic microorganisms. Mucins are the main glycoproteins of mucus that are responsible for interacting with microorganisms and are critical for the antimicrobial properties of mucus. The mechanisms by which microorganisms interact with mucins are poorly understood, especially in terms of fungi, and these interactions are continually evolving. Work in bacterial pathogens has shown that mucins inhibit bacterial virulence traits, including quorum sensing, toxin secretion and biofilm formation. Among the fungal clade, the common opportunistic human fungal pathogen and commensal Candida albicans engages in constant battle with the host innate immune system. This battle creates strong selective pressures for C. albicans to evolve in response to the host. Recent work in C. albicans found that mucins inhibit specific virulence traits, such as surface adherence, filamentation, biofilm formation and the production of secreted proteases. Here we review the current knowledge of microbial interactions with mucins, with a special emphasis on the interactions between C. albicans and mucins.
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Affiliation(s)
- Ashley Valle Arevalo
- Department of Molecular and Cell Biology, University of California – Merced, 5200 North Lake Rd., Merced, CA 95343, USA
- Quantitative and Systems Biology Graduate Program, University of California – Merced, 5200 North Lake Rd., Merced, CA 95343, USA
| | - Clarissa J Nobile
- Department of Molecular and Cell Biology, University of California – Merced, 5200 North Lake Rd., Merced, CA 95343, USA
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Ciurea CN, Kosovski IB, Mare AD, Toma F, Pintea-Simon IA, Man A. Candida and Candidiasis-Opportunism Versus Pathogenicity: A Review of the Virulence Traits. Microorganisms 2020; 8:microorganisms8060857. [PMID: 32517179 PMCID: PMC7355540 DOI: 10.3390/microorganisms8060857] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 12/13/2022] Open
Abstract
One of the most important questions in microbiology nowadays, is how apparently harmless, commensal yeasts like Candida spp. can cause a rising number of infections. The occurrence of the disease requires firstly the attachment to the host cells, followed by the invasion of the tissue. The adaptability translates into a rapid ability to respond to stress factors, to take up nutrients or to multiply under different conditions. By forming complex intracellular networks such as biofilms, Candida spp. become not only more refractive to antifungal therapies but also more prone to cause disease. The inter-microbial interactions can enhance the virulence of a strain. In vivo, the fungal cells face a multitude of challenges and, as a result, they develop complex strategies serving one ultimate goal: survival. This review presents the virulence factors of the most important Candida spp., contributing to a better understanding of the onset of candidiasis and raising awareness of the highly complex interspecies interactions that can change the outcome of the disease.
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Affiliation(s)
- Cristina Nicoleta Ciurea
- Department of Microbiology, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania; (A.D.M.); (F.T.); (I.A.P.-S.); (A.M.)
- Doctoral School, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania;
- Correspondence:
| | - Irina-Bianca Kosovski
- Doctoral School, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania;
- Department of Physiopathology, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania
| | - Anca Delia Mare
- Department of Microbiology, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania; (A.D.M.); (F.T.); (I.A.P.-S.); (A.M.)
| | - Felicia Toma
- Department of Microbiology, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania; (A.D.M.); (F.T.); (I.A.P.-S.); (A.M.)
| | - Ionela Anca Pintea-Simon
- Department of Microbiology, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania; (A.D.M.); (F.T.); (I.A.P.-S.); (A.M.)
- Doctoral School, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania;
| | - Adrian Man
- Department of Microbiology, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mureș, 540139 Târgu Mureș, Romania; (A.D.M.); (F.T.); (I.A.P.-S.); (A.M.)
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Antimicrobial photodynamic therapy reduces gene expression of Candida albicans in biofilms. Photodiagnosis Photodyn Ther 2020; 31:101825. [PMID: 32445962 DOI: 10.1016/j.pdpdt.2020.101825] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 02/08/2023]
Abstract
The present study evaluated whether the oxidative stress caused by antimicrobial photodynamic therapy (aPDT) affects the expression of C. albicans genes related to adhesion and biofilm formation (ALS1 and HPW1) and oxidative stress response (CAP1, CAT1, and SOD1). The aPDT was mediated by two photosensitizing agents (PSs) Photodithazine® (PDZ at 100 and 200 mg/L) or Curcumin (CUR at 40 and 80 μM) and LED (37.5 J/cm2 or 50 J/cm2). The quantification of the expression was performed by Reverse Transcription-Quantitative Polymerase Chain Reaction (RT-qPCR) using specific primers for the target genes. The data were analyzed by Analysis of Variance (α = 0.05), followed by Tukey's post-test. It was observed reduction in the expression of ALS1, HWP1, CAP1, CAT1, and SOD1 when aPDT was performed using 200 mg/L PDZ and 80 μM CUR associated to LED (37.7 and 50 J/cm2, respectively) and using 100 mg/L PDZ and 40 μM CUR with LED of 50 J/cm2 (versus control). Also, the expression of CAP1 and SOD1 genes was reduced after aPDT using 100 mg/L PDZ and LED of 37.5 J/cm2. There was a significant reduction in the expression of genes HWP1, CAP1, and SOD1 after aPDT using 40 μM CUR and 37.5 J/cm2 (versus the control group). The application of LED only at 37.5 and 50 J/cm2 promoted down-regulation of ALS1, CAP1, CAT1, and SOD1 genes (versus the control group). Therefore, aPDT mediated by LED -associated PSs PDZ and CUR promoted a reduction in the expression of the five C. albicans genes evaluated.
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Antifungal Activity of Magnesium Oxide Nanoparticles: Effect on the Growth and Key Virulence Factors of Candida albicans. Mycopathologia 2020; 185:485-494. [PMID: 32328890 DOI: 10.1007/s11046-020-00446-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 04/08/2020] [Indexed: 12/19/2022]
Abstract
The aim of this research was to study the effects of different concentrations of magnesium oxide nanoparticles (MgO NPs) on the growth and key virulence factors of Candida albicans (C. albicans). The minimum inhibitory concentration (MIC) of MgO NPs against C. albicans was determined by the micro-broth dilution method. A time-kill curve of MgO NPs and C. albicans was established to investigate the ageing effect of MgO NPs on C. albicans. Crystal violet staining, the MTT assay, and inverted fluorescence microscopy were employed to determine the effects of MgO NPs on C. albicans adhesion, two-phase morphological transformation, biofilm biomass, and metabolic activity. The time-kill curve showed that MgO NPs had fungicidal and antifungal activity against C. albicans in a time- and concentration-dependent manner. Semi-quantitative crystal violet staining and MTT assays showed that MgO NPs significantly inhibited C. albicans biofilm formation and metabolic activity, and the difference was statistically significant (p < 0.001). Inverted fluorescence microscopy showed that MgO NPs could inhibit the formation of C. albicans biofilm hyphae. Adhesion experiments showed that MgO NPs significantly inhibited the initial adhesion of C. albicans (p < 0.001). This study demonstrates that MgO NPs can effectively inhibit the growth, initial adhesion, two-phase morphological transformation, and biofilm formation of C. albicans and is an antifungal candidate.
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Honey as a Strategy to Fight Candida tropicalis in Mixed-Biofilms with Pseudomonas aeruginosa. Antibiotics (Basel) 2020; 9:antibiotics9020043. [PMID: 31973242 PMCID: PMC7168267 DOI: 10.3390/antibiotics9020043] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/12/2020] [Accepted: 01/14/2020] [Indexed: 01/04/2023] Open
Abstract
Fungal contaminations with Candida species are commonly responsible for several infections, especially when associated to bacteria. The therapeutic approach commonly used is being compromised due to microbial resistances of these microorganisms to antimicrobial agents, especially in biofilm. The use of honey as an antimicrobial agent has been emerging as a valuable solution and proving its potential in planktonic and in biofilm cells. This work aims to assess the effect of different honeys on biofilms of Candida tropicalis and Pseudomonas aeruginosa. The effect of Portuguese heather (PH) and manuka honeys on planktonic growth of Candida was initially evaluated by determination of the minimum inhibitory concentrations (MIC). Then, the same effect was evaluated in mixed biofilms, by colony-forming units numeration and fluorescence microscopy. The combinations of honey plus fluconazole and gentamicin were also tested. The results showed that the honeys tested enabled a great reduction of C. tropicalis, both in planktonic (12.5% and 25% of MIC for PH and manuka) and in biofilm. In polymicrobial biofilms, the use of PH and manuka honeys was revealed to be a promising choice and an alternative treatment, since they were able to reduce cells from both species. No synergistic effect was observed in antimicrobial combinations assays against polymicrobial biofilms.
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12
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Li Y, Shan M, Yan M, Yao H, Wang Y, Gu B, Zhu Z, Li H. Anticandidal Activity of Kalopanaxsaponin A: Effect on Proliferation, Cell Morphology, and Key Virulence Attributes of Candida albicans. Front Microbiol 2019; 10:2844. [PMID: 31849923 PMCID: PMC6902085 DOI: 10.3389/fmicb.2019.02844] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 11/22/2019] [Indexed: 01/15/2023] Open
Abstract
Background The pathogenicity of Candida albicans is attributed to various virulence factors including adhesion to the surface of epithelial cells or mucosa, germ tube formation, hyphal morphogenesis, development of drug resistant biofilms, and so on. The objective of this study was to investigate the effects of Kalopanaxsaponin A (KPA) on the virulence of C. albicans. Methods The effect of KPA on the virulence of C. albicans was characterized by an XTT reduction assay and fluorescent microscopic observation. The action mechanism was further explored using GC/MS system and BioTek Synergy2 spectrofluorophotometry. The cytotoxicity and therapeutic effect of KPA were evaluated by the Caenorhabditis elegans-C. albicans infection model in vivo. Results The minimum inhibitory concentration (MIC) of KPA was 8∼16 μg/mL for various genotypes of C. albicans. The compound was identified as having remarkable effect on the adhesion, morphological transition and biofilm formation of C. albicans. The results of fluorescent microscopy and GC/MS system suggested that KPA could promote the secretion of farnesol by regulating the expression of Dpp3 and decrease the intracellular cAMP level, which together inhibited morphological transition and biofilm formation. Notably, KPA showed low toxicity in vivo and a low possibility of developing resistance. Conclusion Our results demonstrated that KPA had remarkable efficacy against C. albicans pathogenicity, suggesting that it could be a potential option for the clinical treatment of candidiasis.
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Affiliation(s)
- Ying Li
- School of Medical Technology, Xuzhou Medical University, Xuzhou, China
| | - Mingzhu Shan
- School of Medical Technology, Xuzhou Medical University, Xuzhou, China
| | - Mingju Yan
- School of Medical Technology, Xuzhou Medical University, Xuzhou, China
| | - Huankai Yao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Yuechen Wang
- Department of Genetics, Xuzhou Medical University, Xuzhou, China
| | - Bing Gu
- School of Medical Technology, Xuzhou Medical University, Xuzhou, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Zuobin Zhu
- Department of Genetics, Xuzhou Medical University, Xuzhou, China
| | - Hongchun Li
- School of Medical Technology, Xuzhou Medical University, Xuzhou, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
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13
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Niyogi P, Pattnaik S, Maharana L, Mohapatra R, Haldar S. Temperature-dependent mucosal permeation kinetics of stigmasterol microspheres: In vivo mice model antioral candidiasis study. J Biomed Mater Res B Appl Biomater 2019; 108:1636-1654. [PMID: 31721433 DOI: 10.1002/jbm.b.34510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 09/30/2019] [Accepted: 10/06/2019] [Indexed: 11/11/2022]
Abstract
Evaluation of mucosal permeation of stigmasterol from the glutaraldehyde cross linked chitosan microspheres at increasing experimental temperatures was performed. The activation energy of permeation, partition, and diffusion were estimated to understand the permeation kinetic with respect to the temperature. The formulation depicting least activation energy possessed the increased permeation thresholds of drug at the site of application. The encapsulation efficacy and mucoadhesive strength were found to be directly proportional to the polymer-emulsifier ratio. Decreased intensity in crystallography directed the molecular dispersion of microencapsulated drug. The depleted enthalpic phase transition in thermogram affirmed the stigmasterol encapsulation. The sphericity and the size of microspheres were determined by scanning electron photo micrograph. The in vivo quantification of oral Candida infection with different statistical approach and histopathological observation of infected tongue of mice on treatment with the stigmasterol encapsulated microspheres showed significant anti oral candidiasis activity by reduction of fungal colony count and recovery of papillae, reorganization of basal cell layer and newly formed papillae during 21-28 days of treatment.
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Affiliation(s)
- Partha Niyogi
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, Odisha, India
| | - Snigdha Pattnaik
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, Odisha, India
| | - Laxmidhar Maharana
- Department of Pharmacology, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, Odisha, India
| | - Rajaram Mohapatra
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan Deemed to be University, Bhubaneswar, Odisha, India
| | - Saikat Haldar
- Medicinal, Aromatic and Economic Plants Group, Biological Sciences and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam, India
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14
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Lyons KM, Cannon RD, Beumer J, Bakr MM, Love RM. The Role of Biofilms and Material Surface Characteristics in Microbial Adhesion to Maxillary Obturator Materials: A Literature Review. Cleft Palate Craniofac J 2019; 57:487-498. [PMID: 31665902 DOI: 10.1177/1055665619882555] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Maxillofacial prosthetics includes restoration of maxillary defects resulting from resection of palate and nasosinus neoplasms with obturator prostheses which may be colonized by microorganisms and function as a reservoir of infection. Patients with neoplasms commonly also require radiotherapy that can result in changes in saliva quality and quantity and changes in the oral microbial flora. The altered flora, in individuals immunocompromised from cancer therapy, increases their risk of prosthesis-related infections. OBJECTIVES In this review article, we explore microbial biofilms, their main components, mechanisms of microbial adhesion, and stages of biofilm development. We also discuss the different materials that are used for manufacturing maxillary obturators, their characteristic features, and how these can affect microbial adhesion. Furthermore, we shed some light on the factors that affect microbial adhesion to the surface of maxillary obturators including tissue proteins, protein adsorption, and the acquired enamel pellicle. CONCLUSIONS The conclusions drawn from this literature review are that it is imperative to minimize the risk of local and systemic infections in immunocompromised patients with cancer having maxillary defects. It is also important to determine the role of saliva in microbial adhesion to obturator materials as well as develop materials that have a longer life span with surface characteristics that promote less microbial adhesion than current materials.
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Affiliation(s)
- Karl M Lyons
- Department of Oral Rehabilitation and Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Richard D Cannon
- Faculty of Dentistry, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand
| | - John Beumer
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, CA, USA
| | - Mahmoud M Bakr
- School of Dentistry and Oral Health, Griffith University, Queensland, Australia
| | - Robert M Love
- School of Dentistry and Oral Health, Griffith University, Queensland, Australia
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15
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De la Torre-Luna R, Domínguez-Pérez RA, Guillén-Nepita AL, Ayala-Herrera JL, Martínez-Martínez RE, Romero-Ayala ME, Pérez-Serrano RM, Vázquez-Garcidueñas MS. Prevalence of Candida albicans in primary endodontic infections associated with a higher frequency of apical periodontitis in type two diabetes mellitus patients. Eur J Clin Microbiol Infect Dis 2019; 39:131-138. [PMID: 31529305 DOI: 10.1007/s10096-019-03702-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 09/03/2019] [Indexed: 12/18/2022]
Abstract
To identify the prevalence of C. albicans in primary endodontic infections of type two diabetes mellitus (T2DM) patients and compare their clinical and radiographical characteristics with a non-diabetic control group, establishing the possible relationship between primary endodontic infection, T2DM, and C. albicans, since diabetes mellitus (DM), influences the development, course, and response to the treatment of apical periodontitis, but the presence of Candida albicans (C. albicans) has not been considered before. A total of 120 patients were selected and divided into two groups: 60 T2DM diagnosed patients and 60 non-diabetic controls. A clinical examination and radiographic analysis were performed to establish a periapical index score (PAI). Root canal samples were taken. Deoxyribonucleic acid (DNA) was extracted, and specific primers were used to identify C. albicans by polymerase chain reaction (PCR). A twofold increase in the prevalence of C. albicans in T2DM patients was observed in contrast to control patients (p = 0.0251). Sixty-five percent of T2DM patients with positive C. albicans scored a ≥ 3 PAI, while only 27% of the patients without C. albicans had a ≥ 3 PAI score (p = 0.0065). Long-term DM patients presented C. albicans more frequently (p < 0.0001). In this study, long-term T2DM patients carried C. albicans in their root canals more frequently when having a primary endodontic infection. Furthermore, this C. albicans presence seems to be related to a higher frequency of apical periodontitis.
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Affiliation(s)
- Rocio De la Torre-Luna
- Laboratorio de Investigación Odontológica Multidisciplinaria. Facultad de Medicina, Universidad Autónoma de Querétaro, Clavel #200, Prados de La Capilla, 76176, Santiago de Queretaro, QRO, México.,Endodontic Specialization Program, Facultad de Medicina, Universidad Autónoma de Querétaro, Santiago de Queretaro, México
| | - Rubén Abraham Domínguez-Pérez
- Laboratorio de Investigación Odontológica Multidisciplinaria. Facultad de Medicina, Universidad Autónoma de Querétaro, Clavel #200, Prados de La Capilla, 76176, Santiago de Queretaro, QRO, México. .,Endodontic Specialization Program, Facultad de Medicina, Universidad Autónoma de Querétaro, Santiago de Queretaro, México.
| | - Ana Laura Guillén-Nepita
- División de Estudios de Posgrado de la Facultad de Ciencias Médicas y Biológicas "Dr. Ignacio Chávez", Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | | | - Rita Elizabeth Martínez-Martínez
- Departamento de Investigación de la Maestría en Ciencias Odontológicas, Universidad Autónoma de San Luis Potosí, San Luis Potosi, México
| | - Ma Esther Romero-Ayala
- Centro Universitario de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, México
| | - Rosa Martha Pérez-Serrano
- Laboratorio de Investigación Odontológica Multidisciplinaria. Facultad de Medicina, Universidad Autónoma de Querétaro, Clavel #200, Prados de La Capilla, 76176, Santiago de Queretaro, QRO, México.,Endodontic Specialization Program, Facultad de Medicina, Universidad Autónoma de Querétaro, Santiago de Queretaro, México
| | - Ma Soledad Vázquez-Garcidueñas
- División de Estudios de Posgrado de la Facultad de Ciencias Médicas y Biológicas "Dr. Ignacio Chávez", Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
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16
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Efficacy of Compounds Isolated from Streptomyces olivaceus against the Morphogenesis and Virulence of Candida albicans. Mar Drugs 2019; 17:md17080442. [PMID: 31357504 PMCID: PMC6723460 DOI: 10.3390/md17080442] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 02/07/2023] Open
Abstract
Candida albicans is a type of commensal fungi which causes serious infections in immunocompromised patients and contributes to high mortality. In the present study, we identified that the extract from Streptomyces olivaceus SCSIO T05 inhibited hypha and biofilm formation of C. albicans. Seven compounds were isolated and evaluated for their effects on the biological functions and virulence of C. albicans. Two leading compounds, compound 1 (sorbicillin) and compound 2 (3-methyl-N-(2′-phenethyl)-butyrylamide) were identified as exhibiting strong activity against C. albicans morphological transition, adhesion activity, cytotoxicity, and adhesion to human cells, in a dose-dependent manner. Notably, compound 2 inhibited C. albicans infection in mouse oral mucosal models. Transcriptomic analysis and real-time PCR results revealed that compound 2 most likely inhibited the biological functions of C. albicans cells by regulating the expression levels of HWP1, TEC1, ALS1, IFD6, and CSH1, which are associated with filament formation and cell adhesion. Our results suggest that the candidate compounds present excellent efficacy against C. albicans pathogenicity and that they can be developed as potential options for the clinical treatment of candidiasis.
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17
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In Vitro Determination of Hydrolytic Enzymes and Echinocandin Susceptibility in Mexican Clinical Isolates of Candida glabrata Sensu Stricto. Jundishapur J Microbiol 2019. [DOI: 10.5812/jjm.85092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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18
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Zare A, Moshfeghy Z, Zarshenas MM, Jahromi BN, Akbarzadeh M, Sayadi M. Quercus brantii Lindl. Vaginal cream versus placebo on Bacterial Vaginosis: A randomized clinical trial. J Herb Med 2019. [DOI: 10.1016/j.hermed.2018.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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19
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Morse D, Wilson M, Wei X, Bradshaw D, Lewis M, Williams D. Modulation of Candida albicans virulence in in vitro biofilms by oral bacteria. Lett Appl Microbiol 2019; 68:337-343. [PMID: 30825340 PMCID: PMC6849710 DOI: 10.1111/lam.13145] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/26/2019] [Accepted: 02/26/2019] [Indexed: 12/16/2022]
Abstract
Candida-associated denture stomatitis presents as erythema of the palatal mucosa and is caused by biofilms containing the fungus Candida albicans that co-reside with oral bacteria on the denture-fitting surface. This study aimed to assess the effect of several frequently encountered oral bacteria on the expression of C. albicans virulence factors in in vitro polymicrobial biofilms. Biofilms containing C. albicans and selected bacterial species were grown on denture acrylic, and analysed by microscopy and by qPCR for expression of putative virulence genes. Candida albicans-only biofilms showed limited hyphal production. Hyphal development was significantly (P < 0·001) increased when biofilms also contained four species of oral bacteria (Streptococcus sanguinis, Streptococcus gordonii, Actinomyces odontolyticus and Actinomyces viscosus), as was the expression of virulence genes (P < 0·05). Importantly, inclusion of Porphyromonas gingivalis in the biofilm consortium resulted in significant (P < 0·05) inhibition of virulence gene expression and production of hyphae. The in vitro expression of C. albicans virulence factors was modulated in polymicrobial biofilms. The complexity of this modulation was highlighted by the reversal of effects following introduction of a single bacterial species into a biofilm community. SIGNIFICANCE AND IMPACT OF THE STUDY: The impact of individual bacterial species on Candida albicans virulence highlights both the complexity of predicting infection mediated by polymicrobial communities and the potential for management through pro- or prebiotic therapy. The possibility to selectively modulate microbial virulence by addition of, or treatment with pro- or prebiotics avoids the use of conventional antimicrobial compounds, thus reducing the contribution to potential drug resistance. Understanding which bacterial species modulate virulence, and the mechanisms by which this occurs, particularly in biofilms, provides excellent foundations for further research questions, and the potential for novel clinical interventions.
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Affiliation(s)
- D.J. Morse
- School of BiosciencesCardiff UniversityCardiffUK
| | - M.J. Wilson
- School of DentistryCardiff UniversityCardiffUK
| | - X. Wei
- School of DentistryCardiff UniversityCardiffUK
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20
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Moshfeghy Z, Asadi K, Akbarzadeh M, Zare A, Poordast T, Emamghoreishi M, Najib FS, Sayadi M. Quercus Brantii Lindl. Vaginal Douche Versus Clotrimazole on Vaginal Candidiasis: A Randomized Clinical Trial. J Pharmacopuncture 2018; 21:185-194. [PMID: 30283706 PMCID: PMC6168190 DOI: 10.3831/kpi.2018.21.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 07/11/2018] [Accepted: 08/02/2018] [Indexed: 11/22/2022] Open
Abstract
Objectives Vaginal Candidiasis with an approximate prevalence of 30% is the second cause of vaginal infections. Antifungal azole is the first treatment for Vaginal Candidiasis; however, some side effects have been reported for this chemical medicine. Based on the antifungal activity of Inner Stratum of Quercus Brantii (Q. Brantii), the aim of our study was to compare the effects of vaginal douche of Q. Brantii extract and clotrimazole on vaginal candidiasis symptoms before and after the treatments, in women. Methods 89 non-pregnant women with positive KOH test which is capable of identifying the presence of hyphae and mycelium by adding KOH (10%), and a positive vaginal candidiasis culture were randomly divided into two experimental groups, using permuted block randomization method. One group received clotrimazole vaginal cream (1%) and the other group received vaginal douche of Q. Brantii extract. Groups were treated for 7 days and KOH tests and cultures were evaluated again. Data were analyzed via chi-square and independent t-test, using SPSS software. Results According to the results, there were no significant differences between experimental groups for demographic characteristics like age (p=0.403), BMI (p=0.911), educational levels (p=0.862) and contraceptive methods (p=0.702). Moreover, significant differences were seen in vaginal discharge between the groups after the treatments (P=0.043). Conclusion The results suggested that the therapeutic effect of vaginal douche of Q. Brantii extract was approximately similar to that of clotrimazole vaginal cream.
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Affiliation(s)
- Zeinab Moshfeghy
- Community Based Psychiatric Care Center, Shiraz University of Medical Sciences, Shiraz, Iran.,Department of Midwifery, School of Nursing and Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Khadegeh Asadi
- Department of Midwifery, School of Nursing and Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Marzieh Akbarzadeh
- Maternal-Fetal Research Center, Department of Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Atefeh Zare
- Department of Midwifery, School of Nursing and Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Tahereh Poordast
- Infertility Research Center, Shiraz University of Medical Science, Shiraz, Iran.,Department of OB/GYN, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Masoumeh Emamghoreishi
- Department of Pharmacology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh S Najib
- Infertility Research Center, Shiraz University of Medical Science, Shiraz, Iran.,Department of OB/GYN, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehrab Sayadi
- Cardio-vascular Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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21
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Alonso GC, Pavarina AC, Sousa TV, Klein MI. A quest to find good primers for gene expression analysis of Candida albicans from clinical samples. J Microbiol Methods 2018; 147:1-13. [PMID: 29454005 DOI: 10.1016/j.mimet.2018.02.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 01/29/2018] [Accepted: 02/11/2018] [Indexed: 12/20/2022]
Abstract
Biofilm production contributes to several human diseases, including oral candidiasis. Among the Candida species, Candida albicans is the most prevalent. The expression of virulence genes is implicated in the pathogenic potential of Candida biofilms. However, the evaluation of microbial gene expression from in vivo biofilm samples is not trivial, specifically, assessment via quantitative PCR (qPCR) can be a challenge because of several species present in clinical samples. Hence, the necessity of primers specificity. The aim of this study was to evaluate through in silico and in vitro analyses the specificity of published primers and newly designed primers for C. albicans virulence genes: ALS1, CAP1, CAT1, EFG1, HWP1, LIP3, PLB1, SAP1, SAP4, SOD1, SOD5 and ACT1 (normalizing gene). In silico analysis was performed through a PubMed search of articles with primer sequences that evaluated gene expression of C. albicans. Then, the sequence similarity of twenty-eight primers was checked through BLASTn and ClustalW2. The analysis of secondary structures was performed using mfold. When the primers did not present satisfactory characteristics (absence of secondary structures, not discrepant Tm of forward and reverse sequences and specificity) following in vitro analysis (i.e., end point PCR), new primers were designed using Beacon Designer™ and sequences obtained from the "Candida Genome Database". The selected primers were tested in vitro by end point PCR using a panel of genomic DNA from five different Candida species (C. albicans, Candida glabrata, Candida dubliniensis, Candida krusei, and Candida tropicalis). The resulting PCR products were visualized on agarose gel. qPCR reactions were performed to determine primers' optimal concentration and PCR efficiency. End point PCR demonstrated that published primers for the SAP1 and HWP1 were specific for C. albicans and the one for SOD1 reacted with C. albicans and C. dubliniensis. The sequence of primers designed for ACT1, ALS1 and HWP1 genes were specific for C. albicans, while the ones for CAP1, CAT1, EFG1, LIP3, and PLB1 were detected in C. albicans and C. dubliniensis. After optimization, all primers presented a single peak on melt curves, correlation coefficient of ≅1 and qPCR reaction efficiency of 90-110%, with slope of ≅-3.3. Therefore, these primers should be suitable for future gene expression analyses from clinical samples.
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Affiliation(s)
- Gabriela C Alonso
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), School of Dentistry, Araraquara, São Paulo, Brazil
| | - Ana C Pavarina
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), School of Dentistry, Araraquara, São Paulo, Brazil.
| | - Tábata V Sousa
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), School of Dentistry, Araraquara, São Paulo, Brazil
| | - Marlise I Klein
- Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp), School of Dentistry, Araraquara, São Paulo, Brazil
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22
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Furlaneto MC, Góes HP, Perini HF, Dos Santos RC, Furlaneto-Maia L. How much do we know about hemolytic capability of pathogenic Candida species? Folia Microbiol (Praha) 2018; 63:405-412. [PMID: 29335820 DOI: 10.1007/s12223-018-0584-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 01/08/2018] [Indexed: 10/18/2022]
Abstract
Hemolytic factor production by pathogenic Candida species is considered an important attribute in promoting survival within the mammal host through the ability to assimilate iron from the hemoglobin-heme group. Hemolytic capability has been evaluated for Candida species based on hemolysis zones on plate assay, analysis of hemolytic activity in liquid culture medium, and hemolysis from cell-free culture broth. The production of hemolytic factor is variable among Candida species, where C. parapsilosis is the less hemolytic species. In general, no intraspecies differences in beta-hemolytic activities are found among isolates belonging to C. albicans, C. glabrata, C. krusei, C. tropicalis, and C. parapsilosis. The production of hemolytic factor by Candida species is affected by several factors such as glucose supplementation in the culture medium, blood source, presence of erythrocytes and hemoglobin, and presence of electrolytes. On the basis of existing achievements, more researches are still needed in order to extend our knowledge about the biochemical nature of hemolytic molecules produced by distinct Candida species, the mechanism of hemolysis, and the molecular basis of the hemolytic factor expression.
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Affiliation(s)
- Márcia C Furlaneto
- Department of Microbiology, Paraná State University of Londrina, Rodovia Celso Garcia Cid, Km 380, s/n. Campus Universitário, Londrina, PR, 86057-970, Brazil.
| | - Helena P Góes
- Department of Microbiology, Paraná State University of Londrina, Rodovia Celso Garcia Cid, Km 380, s/n. Campus Universitário, Londrina, PR, 86057-970, Brazil
| | - Hugo F Perini
- Department of Microbiology, Paraná State University of Londrina, Rodovia Celso Garcia Cid, Km 380, s/n. Campus Universitário, Londrina, PR, 86057-970, Brazil
| | - Renan C Dos Santos
- Department of Microbiology, Paraná State University of Londrina, Rodovia Celso Garcia Cid, Km 380, s/n. Campus Universitário, Londrina, PR, 86057-970, Brazil
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23
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Sangalli J, Júnior EGJ, Bueno CRE, Jacinto RC, Sivieri-Araújo G, Filho JEG, Cintra LTÂ, Junior ED. Antimicrobial activity of Psidium cattleianum associated with calcium hydroxide against Enterococcus faecalis and Candida albicans: an in vitro study. Clin Oral Investig 2018; 22:2273-2279. [PMID: 29318387 DOI: 10.1007/s00784-017-2326-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Accepted: 12/21/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Evaluate, in vitro, the antimicrobial activity of Psidium cattleianum leaf extracts combined with calcium hydroxide against Enterococcus faecalis and Candida albicans biofilm. MATERIALS AND METHODS Dentin specimens obtained from extracted bovine incisors were infected during 14 days with E. faecalis ATCC 29212 and C. albicans ATCC 10231. The specimens were filled with calcium hydroxide pastes prepared with the following vehicles: Psidium cattleianum ethanolic, Psidium cattleianum propylene glycolic, distilled water, and saline as control. After 24 h, 3, 7, and 14 days, the canals were irrigated with sterile saline and dried. Dentin samples were collected from the canals with burs of increasing diameters. To determine the number of colony-forming units (CFU), samples were inoculated onto BHI agar supplemented with yeast extract (0.5%), at 37 °C, for 48 h, in CO2 enriched atmosphere. Comparisons among the groups for the variation factors were performed by ANOVA and Tukey's test. RESULTS Ethanolic and propylene glycolic extracts showed significantly higher antimicrobial activity against E. faecalis (p < 0.01) when compared with distilled water. The ethanolic extract exhibited in 24 h the same antibacterial activity that propylene glycolic extract and distilled water after 7 and 14 days. For C. albicans, all were effective in reducing the number of CFU at all periods. CONCLUSION The P. cattleianum ethanolic extract presented the fastest and highest antimicrobial activity against E. faecalis, significantly reducing the microbial load in 24 h. All medications were effective against C. albicans. CLINICAL RELEVANCE The antibacterial potential of P. cattleianum and its biological compatibility associated with calcium hydroxide indicate promising applications in the field of dentistry.
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Affiliation(s)
- Jorgiana Sangalli
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil
| | - Elerson Gaetti Jardim Júnior
- Department of Pathology, Microbiology and Imunology, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, São Paulo, Brazil
| | - Carlos Roberto Emerenciano Bueno
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil
| | - Rogério Castilho Jacinto
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil
| | - Gustavo Sivieri-Araújo
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil
| | - João Eduardo Gomes Filho
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil
| | - Luciano Tavares Ângelo Cintra
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil
| | - Eloi Dezan Junior
- Department of Restorative Dentistry, Endodontics, Araçatuba School of Dentistry, UNESP Univ Estadual Paulista, Rua José Bonifácio, 1193, Araçatuba, SP, 16015-050, Brazil.
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Mafojane T, Shangase S, Patel M. The effect of subinhibitory concentrations of gentian violet on the germ tube formation by Candida albicans and its adherence to oral epithelial cells. Arch Oral Biol 2017; 82:1-5. [DOI: 10.1016/j.archoralbio.2017.05.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 05/19/2017] [Accepted: 05/22/2017] [Indexed: 10/19/2022]
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Pathogenic characteristics of Candida albicans isolated from oral cavities of denture wearers and cancer patients wearing oral prostheses. Microb Pathog 2017; 110:128-134. [DOI: 10.1016/j.micpath.2017.06.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/05/2017] [Accepted: 06/24/2017] [Indexed: 11/18/2022]
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Navalkele BD, Revankar S, Chandrasekar P. Candida auris: a worrisome, globally emerging pathogen. Expert Rev Anti Infect Ther 2017; 15:819-827. [PMID: 28783385 DOI: 10.1080/14787210.2017.1364992] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Candida auris is a recently discovered, rapidly emerging fungal pathogen. Infections due to C. auris are hospital-acquired, multidrug resistant and associated with high mortality. Areas covered: This review highlights epidemiology, pathogenesis, microbiological characteristics, clinical presentation, diagnostic challenges and treatment options of C. auris infections. Infection prevention measures to prevent spread of C. auris and special measures during an outbreak situation have also been reviewed. Expert commentary: Rapid emergence of hospital onset C. auris is worrisome. Early diagnosis of C. auris is essential for better outcomes and the implementation of infection prevention measures. Lack of widespread awareness, absence of general availability of diagnostic testing methods, and limited options for treatment of C. auris infections make it a difficult-to-treat pathogen. Further studies are needed for better understanding of this emerging pathogen.
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Affiliation(s)
- Bhagyashri D Navalkele
- a Infection Prevention and Antimicrobial Stewardship Fellow, Division of Infectious Diseases , Wayne State University/Detroit Medical Center , Detroit , MI , USA
| | - Sanjay Revankar
- b Internal Medicine and Infectious Diseases, Infectious Diseases Fellowship Program , Wayne State University , Detroit , MI , USA
| | - Pranatharthi Chandrasekar
- c Internal Medicine and Infectious Diseases, Division of Infectious Diseases , Wayne State University, Karmanos Cancer Institute , Detroit , MI , USA
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Fatahinia M, Halvaeezadeh M, Rezaei-Matehkolaei A. Comparison of enzymatic activities in different Candida species isolated from women with vulvovaginitis. J Mycol Med 2017; 27:188-194. [DOI: 10.1016/j.mycmed.2017.01.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 12/25/2016] [Accepted: 01/11/2017] [Indexed: 01/12/2023]
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Portela MB, Lima de Amorim E, Santos AM, Alexandre da Rocha Curvelo J, de Oliveira Martins K, Capillé CL, Maria de Araújo Soares R, Barbosa de Araújo Castro GF. Candida species from oral cavity of HIV-infected children exhibit reduced virulence factors in the HAART era. Microb Pathog 2016; 102:74-81. [PMID: 27913142 DOI: 10.1016/j.micpath.2016.11.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/24/2016] [Accepted: 11/26/2016] [Indexed: 11/17/2022]
Abstract
This study aimed to assess, in vitro, the biofilm viability and the phospholipase and protease production of Candida spp. from the saliva of HIV infected children and healthy controls, and to correlate the results with the use of medical data. A total of 79 isolates were analyzed: 48 Candida albicans isolates (33/15) and 20 Candida parapsilosis sensu lato complex isolates (12/8) (from HIV/control patients, respectively), and 8 Candida krusei, 1 Candida tropicalis, 1 Candida dubliniensis and 1 Candida guilliermondii from HIV patients. The XTT (2, 3-bis (2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-Carboxanilide) reduction assay analyzed the biofilm viability. Phospholipase and protease assays were performed using the egg yolk and Bovine Serum Albumin agar plate methods, respectively. All isolates were able to form biofilm with cell viability. Quantitatively, Candida isolates from both groups presented a similar ability to form biofilm (p > 0.05). The biofilm viability activity was higher in C. albicans isolates than in non-albicans Candida isolates (p < 0.05) for both groups. Phospholipase activity was detected in 32 isolates (40.5%) and it was significantly higher in the HIV group (p = 0.006). Protease activity was detected in 66 isolates (84.8%) and most of them were relatively/very strong producers. No statistical association with medical data was found in the HIV group. Although Candida spp. isolates from HIV-positive children presented higher phospholipase production, in vitro they exhibited reduced virulence factors compared to isolates from healthy individuals. This finding may enlighten the role played by immunosuppression in the modulation of Candida virulence attributes.
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Affiliation(s)
- Maristela Barbosa Portela
- Department of Clinics and Pediatric Dentistry, School of Dentistry, Universidade Federal Fluminense/Niterói (UFF), Brazil.
| | - Elaine Lima de Amorim
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal do Rio de Janeiro (UFRJ), Brazil
| | - Adrielle Mangabeira Santos
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal do Rio de Janeiro (UFRJ), Brazil
| | - José Alexandre da Rocha Curvelo
- Department of General Microbiology, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Brazil
| | - Karol de Oliveira Martins
- Department of Clinics and Pediatric Dentistry, School of Dentistry, Universidade Federal Fluminense/Niterói (UFF), Brazil
| | - Cauli Lima Capillé
- Department of Clinics and Pediatric Dentistry, School of Dentistry, Universidade Federal Fluminense/Niterói (UFF), Brazil
| | - Rosangela Maria de Araújo Soares
- Department of General Microbiology, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro (UFRJ), Brazil
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Ellepola ANB, Jayathilake JAMS, Sharma PN, Khan ZU. Impact of short-term exposure of antifungal agents on hemolysin activity of oral Candida dubliniensis isolates from Kuwait and Sri Lanka. JOURNAL OF INVESTIGATIVE AND CLINICAL DENTISTRY 2016; 7:424-430. [PMID: 26059506 DOI: 10.1111/jicd.12167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 05/16/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE Ability to produce hemolysin by Candida species is an important determinant of its pathogenicity. Candida dubliniensis is implicated in the causation of oral candidosis, which can be treated with polyene, echinocandin, and azole groups of antifungal agents as well as chlorhexidine. After oral application, however, the concentrations of these agents tend to decrease quickly to subtherapeutic levels due to the peculiarity of the oral environment. In this study, we have evaluated the effect of short-term exposure of sublethal concentrations of these drugs on hemolysin production by oral C. dubliniensis isolates obtained from two different geographical locale. MATERIALS AND METHODS Twenty C. dubliniensis oral isolates obtained from Kuwait and Sri Lanka were exposed to sublethal concentrations of nystatin, amphotericin B, caspofungin, ketoconazole, fluconazole, and chlorhexidine for 1 h. Thereafter, the drugs were removed by dilution and the hemolysin production determined by a previously described plate assay. RESULTS Hemolysin production of these isolates was significantly suppressed with a percentage reduction of 17.09, 16.45, 17.09, 11.39, 8.23 and 12.03 following exposure to nystatin, amphotericin B, caspofungin, ketoconazole, fluconazole, and chlorhexidine, respectively. CONCLUSION Brief exposure to sublethal concentrations of drugs with antifungal properties appears to reduce the pathogenic potential of C. dubliniensis isolates by suppressing hemolysin production.
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Affiliation(s)
- Arjuna N B Ellepola
- Faculty of Dentistry, Health Sciences Center, Kuwait University, Jabriya, Kuwait.
| | | | - Prem N Sharma
- Faculty of Medicine, Health Sciences Center, Kuwait University, Jabriya, Kuwait
| | - Zia U Khan
- Faculty of Medicine, Health Sciences Center, Kuwait University, Jabriya, Kuwait
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Pereira CA, Domingues N, Araújo MIDSA, Junqueira JC, Back-Brito GN, Jorge AOC. Production of virulence factors in Candida strains isolated from patients with denture stomatitis and control individuals. Diagn Microbiol Infect Dis 2016; 85:66-72. [DOI: 10.1016/j.diagmicrobio.2016.01.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 01/18/2016] [Accepted: 01/23/2016] [Indexed: 11/29/2022]
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Ellepola AN, Khajah R, Jayatilake S, Samaranayake L, Sharma P, Khan Z. Impact of brief exposure to antifungal agents on the post-antifungal effect and hemolysin activity of oral Candida albicans. J Appl Oral Sci 2016; 23:412-8. [PMID: 26398514 PMCID: PMC4560502 DOI: 10.1590/1678-775720150100] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Post-antifungal effect (PAFE) of Candida and its production of hemolysin are determinants of candidal pathogenicity. Candida albicans is the foremost aetiological agent of oral candidosis, which can be treated with polyene, azole, and echinocandin antifungals. However, once administered, the intraoral concentrations of these drugs tend to be subtherapeutic and transient due to the diluent effect of saliva and cleansing effect of the oral musculature. Hence, intra-orally, Candida may undergo a brief exposure to antifungal drugs.
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Affiliation(s)
| | - Rana Khajah
- Health Sciences Center, Faculty of Dentistry, Kuwait University, KW
| | | | | | - Prem Sharma
- Health Sciences Center, Faculty of Medicine, Kuwait University, KW
| | - Zia Khan
- Health Sciences Center, Faculty of Medicine, Kuwait University, KW
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Candida bracarensis: Evaluation of Virulence Factors and its Tolerance to Amphotericin B and Fluconazole. Mycopathologia 2015; 180:305-15. [DOI: 10.1007/s11046-015-9925-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 07/06/2015] [Indexed: 11/26/2022]
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Species Distribution, Virulence Factors, and Antifungal Susceptibility Among Candida parapsilosis Complex Isolates Recovered from Clinical Specimens. Mycopathologia 2015; 180:333-43. [DOI: 10.1007/s11046-015-9916-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 06/18/2015] [Indexed: 10/23/2022]
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Abstract
The human pathogenic fungus Candida albicans is the predominant cause of both superficial and invasive forms of candidiasis. C. albicans primarily infects immunocompromised individuals as a result of either immunodeficiency or intervention therapy, which highlights the importance of host immune defences in preventing fungal infections. The host defence system utilises a vast communication network of cells, proteins, and chemical signals distributed in blood and tissues, which constitute innate and adaptive immunity. Over the last decade the identity of many key molecules mediating host defence against C. albicans has been identified. This review will discuss how the host recognises this fungus, the events induced by fungal cells, and the host innate and adaptive immune defences that ultimately resolve C. albicans infections during health.
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Anil S, Hashem M, Vellappally S, Patil S, Bandara HMHN, Samaranayake LP. Sub-inhibitory concentrations of antifungals suppress hemolysin activity of oral Candida albicans and Candida tropicalis isolates from HIV-infected individuals. Mycopathologia 2014; 178:207-15. [PMID: 25142726 DOI: 10.1007/s11046-014-9802-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 08/09/2014] [Indexed: 10/24/2022]
Abstract
Secretion of hydrolytic enzymes such as hemolysin is considered an important virulence attribute of the opportunistic pathogenic fungus Candida. It is known that Candida spp. isolated from HIV-infected patients produce copious hemolysins. As common antifungal agents may perturb the production of extracellular enzymes, we evaluated the effect of three antifungals nystatin, amphotericin B and fluconazole on the hemolytic activity of Candida albicans and Candida tropicalis isolates from HIV-infected individuals. The impact of antimycotics on hemolytic activity was assessed by a previously described in vitro plate assay, after exposing ten isolates each of C. albicans and C. tropicalis recovered from HIV-infected individuals to sub-minimum inhibitory concentrations (sub-MIC) of nystatin, amphotericin B and fluconazole. All Candida isolates showed a significant reduction in hemolytic activity. The reduction was highest for amphotericin B-exposed C. albicans and C. tropicalis followed by nystatin and fluconazole. The effect of antimycotics was more pronounced on the hemolytic activity of C. tropicalis compared to that of C. albicans. Commonly used antifungal agents significantly suppress hemolysin activity of Candida species. This implies that the antifungals, in addition to their lethality, may modulate key virulence attributes of the yeast. The clinical relevance of this phenomenon in HIV disease and other similar pathologies remains to be determined.
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Affiliation(s)
- Sukumaran Anil
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia,
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Antifungal susceptibility patterns, in vitro production of virulence factors, and evaluation of diagnostic modalities for the speciation of pathogenic Candida from blood stream infections and vulvovaginal candidiasis. J Pathog 2014; 2014:142864. [PMID: 25110589 PMCID: PMC4119684 DOI: 10.1155/2014/142864] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 06/23/2014] [Indexed: 12/24/2022] Open
Abstract
Candida spp. have emerged as successful pathogens in both invasive and mucosal infections. Varied virulence factors and growing resistance to antifungal agents have contributed to their pathogenicity. We studied diagnostic accuracy of HiCrome Candida Differential Agar and Vitek 2 Compact system for identification of Candida spp. in comparison with species-specific PCR on 110 clinical isolates of Candida from blood stream infections (54, 49%) and vulvovaginal candidiasis (56, 51%). C. albicans (61%) was the leading pathogen in VVC, while C. tropicalis (46%) was prominent among BSIs. HiCrome Agar and Vitek 2 Compact had good measures of agreement (κ) 0.826 and 0.895, respectively, in comparison with PCR. We also tested these isolates for in vitro production of proteinase, esterase, phospholipases, and biofilms. Proteinase production was more among invasive isolates (P = 0.017), while phospholipase production was more among noninvasive isolates (P = 0.001). There was an overall increase in the production of virulence factors among non-albicans Candida. Identification of clinical isolates of Candida up to species level either by chromogenic agar or by Vitek 2 Compact system should be routinely done to choose appropriate therapy.
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Souza JLS, da Silva AF, Carvalho PHA, Pacheco BS, Pereira CMP, Lund RG. Aliphatic fatty acids and esters: inhibition of growth and exoenzyme production of Candida, and their cytotoxicity in vitro: anti-Candida effect and cytotoxicity of fatty acids and esters. Arch Oral Biol 2014; 59:880-6. [PMID: 24907517 DOI: 10.1016/j.archoralbio.2014.05.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 04/09/2014] [Accepted: 05/12/2014] [Indexed: 10/25/2022]
Abstract
The secretion of extracellular phospholipases and proteinases of Candida has been described as a relevant virulence factor in human infections. Aliphatic fatty acids have antimicrobial properties, but the mechanism by which they affect the virulence factors of microorganisms, such as Candida, is still unclear, and there are a few reports about their toxicity. The current study investigated the in vitro antifungal activity, exoenzyme production and cytotoxicity of some aliphatic fatty acids and their ester derivatives against the Candida species. The minimum inhibitory concentration and minimum fungicidal concentrations of aliphatic medium-chain fatty acids, methyl and ethyl esters were performed using the CLSI M27-A3 method and the cytotoxicity assay was performed according to ISO 10993-5. The influence of these compounds in the inhibition of the production of hydrolytic enzymes, phospholipases and proteinases by Candida was also investigated. Data analysis was performed using the one-way ANOVA method (p≤0.05). In relation to the MIC against Candida species, the fatty acid with the best result was Lauric acid, although its ester derivatives showed no activity. The inhibition of phospholipase production was more significant than the inhibition of proteinase production by Candida. Tested fatty acids revealed more than 80% cell viability in their MIC concentrations. Additionally, a cell viability of 100% was reported at concentrations of anti-enzymatic effect. Therefore, the potential use of these fatty acids could be the basis for more antimicrobial tests.
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Affiliation(s)
- Juliana L S Souza
- Laboratory of Microbiology, Postgraduate Program in Biochemistry and Bioprospection, Federal University of Pelotas (UFPel) - Gonçalves Chaves, 457/702, 96015-560 Pelotas, RS, Brazil
| | - Adriana F da Silva
- School of Dentistry, Federal University of Pelotas (UFPel) - Gonçalves Chaves, 457/503, 96015-560 Pelotas, RS, Brazil
| | - Pedro H A Carvalho
- Laboratory of Microbiology, Postgraduate Program in Biochemistry and Bioprospection, Federal University of Pelotas (UFPel) - Gonçalves Chaves, 457/702, 96015-560 Pelotas, RS, Brazil
| | - Bruna S Pacheco
- Center for Chemical, Pharmaceutical and Food Sciences, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Cláudio M P Pereira
- Center for Chemical, Pharmaceutical and Food Sciences, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Rafael G Lund
- Laboratory of Microbiology, Postgraduate Program in Biochemistry and Bioprospection, Federal University of Pelotas (UFPel) - Gonçalves Chaves, 457/702, 96015-560 Pelotas, RS, Brazil.
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Kasper L, Seider K, Gerwien F, Allert S, Brunke S, Schwarzmüller T, Ames L, Zubiria-Barrera C, Mansour MK, Becken U, Barz D, Vyas JM, Reiling N, Haas A, Haynes K, Kuchler K, Hube B. Identification of Candida glabrata genes involved in pH modulation and modification of the phagosomal environment in macrophages. PLoS One 2014; 9:e96015. [PMID: 24789333 PMCID: PMC4006850 DOI: 10.1371/journal.pone.0096015] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 04/02/2014] [Indexed: 12/27/2022] Open
Abstract
Candida glabrata currently ranks as the second most frequent cause of invasive candidiasis. Our previous work has shown that C. glabrata is adapted to intracellular survival in macrophages and replicates within non-acidified late endosomal-stage phagosomes. In contrast, heat killed yeasts are found in acidified matured phagosomes. In the present study, we aimed at elucidating the processes leading to inhibition of phagosome acidification and maturation. We show that phagosomes containing viable C. glabrata cells do not fuse with pre-labeled lysosomes and possess low phagosomal hydrolase activity. Inhibition of acidification occurs independent of macrophage type (human/murine), differentiation (M1-/M2-type) or activation status (vitamin D3 stimulation). We observed no differential activation of macrophage MAPK or NFκB signaling cascades downstream of pattern recognition receptors after internalization of viable compared to heat killed yeasts, but Syk activation decayed faster in macrophages containing viable yeasts. Thus, delivery of viable yeasts to non-matured phagosomes is likely not triggered by initial recognition events via MAPK or NFκB signaling, but Syk activation may be involved. Although V-ATPase is abundant in C. glabrata phagosomes, the influence of this proton pump on intracellular survival is low since blocking V-ATPase activity with bafilomycin A1 has no influence on fungal viability. Active pH modulation is one possible fungal strategy to change phagosome pH. In fact, C. glabrata is able to alkalinize its extracellular environment, when growing on amino acids as the sole carbon source in vitro. By screening a C. glabrata mutant library we identified genes important for environmental alkalinization that were further tested for their impact on phagosome pH. We found that the lack of fungal mannosyltransferases resulted in severely reduced alkalinization in vitro and in the delivery of C. glabrata to acidified phagosomes. Therefore, protein mannosylation may play a key role in alterations of phagosomal properties caused by C. glabrata.
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Affiliation(s)
- Lydia Kasper
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
| | - Katja Seider
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
| | - Franziska Gerwien
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
| | - Stefanie Allert
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
| | - Sascha Brunke
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
- Integrated Research and Treatment Center, Sepsis und Sepsisfolgen, Center for Sepsis Control and Care (CSCC), University Hospital, Jena, Germany
| | - Tobias Schwarzmüller
- Department of Medical Biochemistry, Max F. Perutz Laboratories, Medical University, Vienna, Austria
| | - Lauren Ames
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Cristina Zubiria-Barrera
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
| | - Michael K. Mansour
- Massachusetts General Hospital, Department of Medicine, Division of Infectious Disease, Boston, Massachusetts, United States of America
| | | | - Dagmar Barz
- Institute for Transfusion Medicine, University Hospital, Jena, Germany
| | - Jatin M. Vyas
- Massachusetts General Hospital, Department of Medicine, Division of Infectious Disease, Boston, Massachusetts, United States of America
| | - Norbert Reiling
- Division of Microbial Interface Biology, Research Center Borstel, Leibniz Center for Medicine and Biosciences, Borstel, Germany
| | - Albert Haas
- Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Ken Haynes
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Karl Kuchler
- Department of Medical Biochemistry, Max F. Perutz Laboratories, Medical University, Vienna, Austria
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute, Jena, Germany
- Integrated Research and Treatment Center, Sepsis und Sepsisfolgen, Center for Sepsis Control and Care (CSCC), University Hospital, Jena, Germany
- Friedrich Schiller University, Jena, Germany
- * E-mail:
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Abi-chacra ÉA, Souza LO, Cruz LP, Braga-Silva LA, Gonçalves DS, Sodré CL, Ribeiro MD, Seabra SH, Figueiredo-Carvalho MH, Barbedo LS, Zancopé-Oliveira RM, Ziccardi M, Santos AL. Phenotypical properties associated with virulence from clinical isolates belonging to theCandida parapsilosiscomplex. FEMS Yeast Res 2013; 13:831-48. [DOI: 10.1111/1567-1364.12092] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 08/22/2013] [Accepted: 09/07/2013] [Indexed: 11/28/2022] Open
Affiliation(s)
- Érika A. Abi-chacra
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
| | - Lucieri O.P. Souza
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
| | - Lucas P. Cruz
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
| | - Lys A. Braga-Silva
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
- Programa de Pós-Graduação em Bioquímica; Instituto de Química; UFRJ; Rio de Janeiro Brazil
| | - Diego S. Gonçalves
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
- Programa de Pós-Graduação em Bioquímica; Instituto de Química; UFRJ; Rio de Janeiro Brazil
| | - Cátia L. Sodré
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
- Departamento de Biologia Celular e Molecular; Instituto de Biologia; Universidade Federal Fluminense (UFF); Niterói Brazil
| | - Marcos D. Ribeiro
- Laboratório de Bacteriologia/Micologia; Instituto de Biologia do Exército (IBEx); Rio de Janeiro Brazil
| | - Sergio H. Seabra
- Laboratório de Tecnologia em Cultura de Células; Centro Universitário Estadual da Zona Oeste (UEZO); Duque de Caxias Brazil
| | - Maria H.G. Figueiredo-Carvalho
- Laboratório de Micologia; Instituto de Pesquisa Clínica Evandro Chagas; Fundação Oswaldo Cruz (FIOCRUZ); Rio de Janeiro Brazil
| | - Leonardo S. Barbedo
- Laboratório de Micologia; Instituto de Pesquisa Clínica Evandro Chagas; Fundação Oswaldo Cruz (FIOCRUZ); Rio de Janeiro Brazil
| | - Rosely M. Zancopé-Oliveira
- Laboratório de Micologia; Instituto de Pesquisa Clínica Evandro Chagas; Fundação Oswaldo Cruz (FIOCRUZ); Rio de Janeiro Brazil
| | - Mariangela Ziccardi
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
- Laboratório Interdisciplinar de Pesquisas Médicas; Instituto Oswaldo Cruz; Fundação Oswaldo Cruz (FIOCRUZ); Rio de Janeiro Brazil
| | - André L.S. Santos
- Laboratório de Investigação de Peptidases (LIP); Departamento de Microbiologia Geral; Instituto de Microbiologia Paulo de Góes (IMPG); Centro de Ciências da Saúde (CCS); Universidade Federal do Rio de Janeiro (UFRJ); Rio de Janeiro Brazil
- Programa de Pós-Graduação em Bioquímica; Instituto de Química; UFRJ; Rio de Janeiro Brazil
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40
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Dodonaea viscosa var. angustifolia Inhibits Germ Tube and Biofilm Formation by C. albicans. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:261978. [PMID: 24223612 PMCID: PMC3809598 DOI: 10.1155/2013/261978] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 09/05/2013] [Indexed: 11/30/2022]
Abstract
The virulence factors of Candida albicans are germ tube and biofilm formation, adherence to host tissues, and production of hydrolytic enzymes. This study investigated the effect of Dodonaea viscosa var. angustifolia extract on the germ tube and biofilm formation of C. albicans. Serum containing the three subinhibitory concentrations of leaf extract was inoculated with C. albicans, incubated, and viewed under a light microscope. Number of cells with germ tube was recorded and the results were analysed using Scheffe test for pairwise comparison. Biofilms were grown on coverslips in the presence of plant extracts and processed for scanning electron microscopy (SEM). Planktonic cells were grown in the presence of plant extract for 6 h and processed for electron microscopy (TEM).
The crude plant extract significantly (P < 0.01) reduced the germ tube formation of C. albicans at 3.125 (85.36%), 1.56 (61.91%), and 0.78 mg/mL (26.27%) showing a concentration dependent effect. SEM results showed concentration dependent reduction in biofilm and hyphae formation. TEM results showed that the plant extract caused damage to the cell wall and cell membrane. DVA extract has ability to reduce virulence of C. albicans by inhibiting germ tube and biofilm formation through damage to the cell wall. Therefore, it has therapeutic potential.
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Abstract
Candida infections of the skin, mucous membranes as well as of internal organs may be more frequent and more serious in the elderly. There are several biological reasons for this, for example, alterations in the immune system. Whereas Candida albicans remains the major pathogen, there has been a relative increase of Candida glabrata infections. This species is associated with higher mortality. Furthermore, C. glabrata is in general less susceptible to fluconazole, so that this drug does not represent the agent of first choice for the treatment of yeast infections. The choice of the antimycotic agent must take into consideration their inherent side effects and interaction profiles; echinocandins play a particular role in the treatment of yeast infections in the elderly. These drugs have low toxicities, low potential for interactions with co-medications, as well as broad and good activities against yeasts.
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Affiliation(s)
- H Hof
- Labor Limbach, Heidelberg.
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Antifungal susceptibility, exoenzyme production and cytotoxicity of novel oximes against Candida. Mycopathologia 2013; 176:201-10. [PMID: 23824511 DOI: 10.1007/s11046-013-9675-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 06/21/2013] [Indexed: 10/26/2022]
Abstract
Novel oximes were synthesized, their in vitro antifungal activity against Candida was evaluated and their cytotoxicity was determined. The procedure used for the synthesis of the oximes is aligned with the current green chemistry trend; water is employed as the solvent in this reaction. The minimum inhibitory and minimum fungicidal concentrations of the oximes were evaluated using the CLSI M27-A3 method. The influence of these compounds on the inhibition of the production of hydrolytic enzymes, phospholipase and proteinase by Candida was also investigated. The compounds showed a good ability to inhibit phospholipase, with a 50 % reduction in most cases. However, the tested compounds did not affect proteinase. The current results showed a substantial reduction in the phospholipase production, which suggests that compounds of this class may interfere with host infection and disease progression. The oximes examined showed lower fungicidal activities than fluconazole but interfered significantly with the expression of phospholipase. Some of the oximes included in this study could be a suitable matrix for the development of novel antifungal compounds.
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43
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Characterization of the vaginal fungal flora in pregnant diabetic women by 18S rRNA sequencing. Eur J Clin Microbiol Infect Dis 2013; 32:1031-40. [PMID: 23463448 DOI: 10.1007/s10096-013-1847-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 02/19/2013] [Indexed: 01/09/2023]
Abstract
Pregnancy and diabetes are regarded as individual risk factors for vaginal candidiasis. The high prevalence of vaginal candidiasis in pregnant diabetic women can be explained by disruption of the balance of the vaginal normal flora. However, little is known about the overall structure and composition of the vaginal fungal flora in pregnant diabetic women. In the present study, the diversity and richness of the vaginal fungal flora in healthy non-pregnant women (group HN), healthy pregnant women (group HP), women with gestational diabetes mellitus (group GDM), and pregnant women with diabetes mellitus type I (group T1DM) were investigated using an 18S rRNA gene clone library method. Our data demonstrated that the composition of the vaginal fungal flora in the four groups could be divided into two phyla (Ascomycetes, 20/26, and Basidiomycetes, 6/26). The most predominant vaginal fungal species belonged to the Candida and Saccharomyces genera, uncultured fungi, and a large number of low-abundance taxa that were unrecorded or underrepresented in previous studies using cultivation-dependent methods. Variation in operational taxonomic units (OTUs) between the study cohorts was generally high in the clone libraries, as 9, 13, 17, and 20 phylotypes were identified in groups HN, HP, GDM, and T1DM, respectively. The Shannon indices of groups GDM and T1DM (with poorer glycemic control) were significantly higher compared to groups HN and HP (p < 0.05). The data presented here revealed an increased diversity and varied composition of the vaginal fungal flora in pregnant diabetic women and demonstrated that poor glycemic control might be associated with disturbances in the vaginal fungal flora.
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Silva S, Negri M, Henriques M, Oliveira R, Williams DW, Azeredo J. Candida glabrata, Candida parapsilosisandCandida tropicalis: biology, epidemiology, pathogenicity and antifungal resistance. FEMS Microbiol Rev 2012; 36:288-305. [DOI: 10.1111/j.1574-6976.2011.00278.x] [Citation(s) in RCA: 578] [Impact Index Per Article: 48.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Abstract
Echinocandins are commonly used as initial empiric therapy in cases of moderate to severe invasive candidiasis. The authors demonstrate that caution should be exercised in applying this approach in certain clinical situations. A case of Candida glabrata fungemia and associated chorioretinitis that was clinically resistant to therapy with micafungin but appeared to resolve with amphotericin B is presented. The authors then briefly review current issues regarding the diagnosis and treatment of C glabrata chorioretinitis.
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46
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Arzmi MH, Abdul Razak F, Yusoff Musa M, Wan Harun WHA. Effect of phenotypic switching on the biological properties and susceptibility to chlorhexidine in Candida krusei ATCC 14243. FEMS Yeast Res 2012; 12:351-8. [DOI: 10.1111/j.1567-1364.2011.00786.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 12/19/2011] [Accepted: 12/20/2011] [Indexed: 11/27/2022] Open
Affiliation(s)
- Mohd Hafiz Arzmi
- Department of Oral Biology; Faculty of Dentistry; University of Malaya; Kuala Lumpur; Malaysia
| | - Fathilah Abdul Razak
- Department of Oral Biology; Faculty of Dentistry; University of Malaya; Kuala Lumpur; Malaysia
| | - Md Yusoff Musa
- Institute of Biological Sciences; Faculty of Science; University of Malaya; Kuala Lumpur; Malaysia
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47
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Weckwerth PH, Carnietto C, Weckwerth ACVB, Duarte MAH, Kuga MC, Vivan RR. In vitro susceptibility of oral Candida albicans strains to different pH levels and calcium hydroxide saturated aqueous solution. Braz Dent J 2012; 23:192-8. [DOI: 10.1590/s0103-64402012000300002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 03/05/2012] [Indexed: 11/22/2022] Open
Abstract
Candida albicans is present in the oral cavity and in the whole digestive tract of humans and other animals, being frequently related to endodontic treatment failure. The present study determined the incidence of C. albicans in the oral cavity and the susceptibility of isolates to different pH values and saturated calcium hydroxide aqueous solution at pH 12.5. Sixty-five patients attending the Endodontic Clinic at the Sagrado Coração University participated in the study. The collected samples were cultivated in selective media for C. albicans and the isolates were tested in terms of resistance to both alkaline pH and saturated aqueous solution of calcium hydroxide. In relation to time variables, yeast viability was assessed by the Sabouraud's agar culture and fluorescein diacetate and ethidium bromide fluorescent staining method. Results from the different pHs and experimental times, including those from different techniques measuring fungal viability, were compared using the chi-square and Fisher's exact tests (α=0.05). The yeasts became completely inviable after 48 h of contact with the calcium hydroxide solution. On the other hand, when exposed to the alkaline culture broth, the yeasts were found to be viable at pHs 9.5 and 10.5 for up to 7 days. In conclusion, C. albicans can only be completely inhibited by direct contact with saturated calcium hydroxide aqueous solution after 48 h of exposure.
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48
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Declining incidence of candidemia in a tertiary inpatient pediatric population. J Clin Microbiol 2011; 50:1048-50. [PMID: 22170913 DOI: 10.1128/jcm.06346-11] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We examined the incidence of candidemia, Candida species distribution, and antifungal susceptibility patterns in a pediatric institution. We identified 301 episodes of candidemia from 2001 to 2010 inclusive. Annual incidence decreased from 0.68 to 0.12 cases/1,000 patient days between 2004 and 2010. Candida albicans was the most common species, followed by C. parapsilosis. All isolates tested were susceptible to amphotericin B and caspofungin, but 11% were resistant or dose-dependently susceptible to fluconazole.
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Vinterová Z, Sanda M, Dostál J, Hrušková-Heidingsfeldová O, Pichová I. Evidence for the presence of proteolytically active secreted aspartic proteinase 1 of Candida parapsilosis in the cell wall. Protein Sci 2011; 20:2004-12. [PMID: 21953587 DOI: 10.1002/pro.744] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 09/13/2011] [Indexed: 11/09/2022]
Abstract
Pathogenic yeasts of the genus Candida produce secreted aspartic proteinases, which are known to enhance virulence. We focused on Sapp1p proteinase secreted by Candida parapsilosis and studied the final stage of its passage through the cell wall and release into the extracellular environment. We found that Sapp1p displays enzyme activity prior to secretion, and therefore, it is probably fully folded within the upper layer of the cell wall. The positioning of cell surface-associated Sapp1p was detected by cell wall protein labeling using biotinylation agents, extraction of cell wall proteins by β-mercaptoethanol, immunochemical detection, and mass spectrometry analysis. All lysine residues present in the structure of soluble, purified Sapp1p were labeled with biotin. In contrast, the accessibility of individual lysines in cell wall-associated Sapp1p varied with the exception of four lysine residues that were biotinylated in all experiments performed, suggesting that Sapp1p has a preferred orientation in the cell wall. As the molecular weight of this partially labeled Sapp1p did not differ among the experiments, we can assume that the retaining of Sapp1p in the cell wall is not a totally random process and that pathogenic yeasts might use this cell-associated proteinase activity to enhance degradation of appropriate substrates.
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Affiliation(s)
- Zuzana Vinterová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, vvi, Prague, Czech Republic
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50
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Seider K, Brunke S, Schild L, Jablonowski N, Wilson D, Majer O, Barz D, Haas A, Kuchler K, Schaller M, Hube B. The facultative intracellular pathogen Candida glabrata subverts macrophage cytokine production and phagolysosome maturation. THE JOURNAL OF IMMUNOLOGY 2011; 187:3072-86. [PMID: 21849684 DOI: 10.4049/jimmunol.1003730] [Citation(s) in RCA: 160] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although Candida glabrata is an important human pathogenic yeast, its pathogenicity mechanisms are largely unknown. Immune evasion strategies seem to play key roles during infection, since very little inflammation is observed in mouse models. Furthermore, C. glabrata multiplies intracellularly after engulfment by macrophages. In this study, we sought to identify the strategies that enable C. glabrata to survive phagosome biogenesis and antimicrobial activities within human monocyte-derived macrophages. We show that, despite significant intracellular proliferation, macrophage damage or apoptosis was not apparent, and production of reactive oxygen species was inhibited. Additionally, with the exception of GM-CSF, levels of pro- and anti-inflammatory cytokines were only marginally increased. We demonstrate that adhesion to and internalization by macrophages occur within minutes, and recruitment of endosomal early endosomal Ag 1 and lysosomal-associated membrane protein 1 indicates phagosome maturation. However, phagosomes containing viable C. glabrata, but not heat-killed yeasts, failed to recruit cathepsin D and were only weakly acidified. This inhibition of acidification did not require fungal viability, but it had a heat-sensitive surface attribute. Therefore, C. glabrata modifies the phagosome into a nonacidified environment and multiplies until the host cells finally lyse and release the fungi. Our results suggest persistence of C. glabrata within macrophages as a possible immune evasion strategy.
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Affiliation(s)
- Katja Seider
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knoell Institute, 07745 Jena, Germany
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