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Candida biofilm

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https://www.readbyqxmd.com/read/29145445/a-new-approach-by-optical-coherence-tomography-for-elucidating-biofilm-formation-by-emergent-candida-species
#1
Melyna Chaves Leite de Andrade, Marcos Andre Soares de Oliveira, Franz de Assis Graciano Dos Santos, Pamella de Brito Ximenes Vilela, Michellangelo Nunes da Silva, Danielle Patrícia Cerqueira Macêdo, Reginaldo Gonçalves de Lima Neto, Henrique Jonh Pereira Neves, Ildnay de Souza Lima Brandão, Guilherme Maranhão Chaves, Renato Evangelista de Araujo, Rejane Pereira Neves
The majority of microorganisms present a community lifestyle, establishing biofilm ecosystems. However, little is known about its formation in emergent Candida species involved in catheter-related infections. Thus, various techniques may be used in the biofilm detection to elucidate structure and clinical impact. In this context, we report the ability of emergent Candida species (Candida haemulonii, C. lusitaniae, C. pelliculosa, C.guilliermondii, C. famata and C. ciferrii) on developing well structured biofilms with cell viability and architecture, using optical coherence tomography (OCT)...
2017: PloS One
https://www.readbyqxmd.com/read/29142743/anti-candida-activity-of-antimicrobial-impregnated-central-venous-catheters
#2
L Cobrado, A Silva-Dias, M M Azevedo, A Rodrigues
Background: Whenever the rate of central line-associated bloodstream infections (CLABSIs) remains high even after the implementation of preventive strategies, the use of chlorhexidine/silver sulfadiazine (CSS) or minocycline/rifampin (MR)-impregnated central venous catheters (CVCs) is currently recommended. Nevertheless, the efficacy of such CVCs against Candida albicans and other emerging non-albicans spp. has been insufficiently studied. This study aims to compare the activity of CSS and MR-impregnated CVCs against the yeasts most frequently isolated from CLABSIs...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29139623/extracellular-proteinases-of-candida-species-pathogenic-yeasts
#3
Maria Rapala-Kozik, Oliwia Bochenska, Dorota Zajac, Justyna Karkowska-Kuleta, Mariusz Gogol, Marcin Zawrotniak, Andrzej Kozik
The increased incidence of severe disseminated infections caused by opportunistic yeast-like fungi Candida spp. highlights the urgent need for research into the major virulence factors of these pathogens - extracellular aspartic proteinases of the candidapepsin and yapsin families. Classically, these enzymes were considered to be generally destructive factors that damage host tissues and provide nutrients for pathogen propagation. However, in recent decades, novel and more specific functions have been suggested for extracellular candidal proteinases...
November 15, 2017: Molecular Oral Microbiology
https://www.readbyqxmd.com/read/29138104/novel-mixed-vesicles-containing-lactobacilli-biosurfactant-for-vaginal-delivery-of-an-anti-candida-agent
#4
Angela Abruzzo, Barbara Giordani, Carola Parolin, Beatrice Vitali, Michele Protti, Laura Mercolini, Martina Cappelletti, Stefano Fedi, Federica Bigucci, Teresa Cerchiara, Barbara Luppi
The purpose of this work was to prepare and characterize an innovative formulation for vaginal delivery of econazole nitrate, commonly used for the treatment of Candida infections. A novel biosurfactant isolated from a vaginal Lactobacillus strain was used to prepare phosphatidylcholine based mixed vesicles. Biosurfactant was produced by Lactobacillus gasseri BC9, isolated from the vagina of a healthy premenopausal woman, and was chemically characterized by FT-IR and ESI-MS. Mixed vesicles, obtained through film rehydration and extrusion method, were characterized in terms of size, zeta potential, encapsulation efficiency, mucoadhesion properties and econazole release...
November 11, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29137671/herpes-simplex-virus-1-entrapped-in-candida-albicans-biofilm-displays-decreased-sensitivity-to-antivirals-and-uva1-laser-treatment
#5
Cristian Ascione, Arianna Sala, Elham Mazaheri-Tehrani, Simona Paulone, Beniamino Palmieri, Elisabetta Blasi, Claudio Cermelli
BACKGROUND: Recently, we published data suggesting a mutualistic relationship between HSV-1 and Candida. albicans; in particular: (a) HSV-1 infected macrophages are inhibited in their anti-Candida effector function and (b) Candida biofilm protects HSV-1 from inactivation. The present in vitro study is aimed at testing the effects of Candida biofilm on HSV-1 sensitivity to pharmacological and physical stress, such as antiviral drugs (acyclovir and foscarnet) and laser UVA1 irradiation...
November 14, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29135948/effect-of-a-lactobacillus-salivarius-probiotic-on-a-double-species-streptococcus-mutans-and-candida-albicans-caries-biofilm
#6
Wirginia Krzyściak, Dorota Kościelniak, Monika Papież, Palina Vyhouskaya, Katarzyna Zagórska-Świeży, Iwona Kołodziej, Beata Bystrowska, Anna Jurczak
The aim of the study was to evaluate the anti-cariogenic effects of Lactobacillus salivarius by reducing pathogenic species and biofilm mass in a double-species biofilm model. Coexistence of S. mutans with C. albicans can cause dental caries progression or recurrence of the disease in the future. Fifty-nine children with diagnosed early childhood caries (ECC) were recruited onto the study. The condition of the children's dentition was defined according to the World Health Organization guidelines. The participants were divided into children with initial enamel demineralization and children showing dentin damage...
November 14, 2017: Nutrients
https://www.readbyqxmd.com/read/29135059/effect-of-incorporation-of-antifungal-agents-on-the-ultimate-tensile-strength-of-temporary-soft-denture-liners
#7
Karin Hermana Neppelenbroek, Jozely Francisca Mello Lima, Juliana Hotta, Lucas Lulo Galitesi, Ana Lucia Pompéia Fraga Almeida, Vanessa Migliorini Urban
PURPOSE: To investigate the ultimate tensile strength of temporary soft denture liners modified by minimum inhibitory concentrations (MICs) of antifungal agents for Candida albicans biofilm (SC5314) determined in previous microbiological research. MATERIALS AND METHODS: Dumbbell-shaped specimens (n = 7) with a central cross-sectional area of 6 × 3 × 33 mm were produced by Softone and Trusoft, without (control) or with incorporation of drugs in powder form at MICs for C...
November 14, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29134404/curcumin-mediated-anti-microbial-photodynamic-therapy-against-candida-dubliniensis-biofilms
#8
Paula Volpato Sanitá, Ana Cláudia Pavarina, Lívia Nordi Dovigo, Ana Paula Dias Ribeiro, Mariana Carvalho Andrade, Ewerton Garcia de Oliveira Mima
The purpose of this study was to evaluate the effectiveness of anti-microbial photodynamic therapy (aPDT) mediated by curcumin (Cur) associated with LED light against biofilms of Candida dubliniensis, and further, investigate cellular uptake and drug penetration through the biofilms under confocal laser scanning microscopy (CLSM). Four C. dubliniensis strains were tested: three clinical isolates from HIV-positive patients and one reference strain (CBS 7987). Biofilms were treated with three Cur concentrations (20...
November 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29133552/cd101-a-novel-echinocandin-possesses-potent-anti-biofilm-activity-against-early-and-mature-candida-albicans-biofilms
#9
Jyotsna Chandra, Mahmoud A Ghannoum
Currently available echinocandins are generally effective against Candida biofilms, but recent emergence of resistance has underscored the importance of developing new antifungal agents that are effective against biofilms. CD101 is a long-acting, novel echinocandin with distinctive pharmacokinetic properties and improved stability and safety relative to other drugs in the same class. CD101 is currently being evaluated as a once-weekly IV infusion for the treatment of candidemia and invasive candidiasis. In this study, we determined: (1) the effect of CD101 against early and mature phase biofilms formed by C...
November 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29133157/microbiological-and-clinical-characteristics-of-biofilm-forming-candida-parapsilosis-isolates-associated-with-fungaemia-and-their-impact-on-mortality
#10
Silvia Soldini, Brunella Posteraro, Antonietta Vella, Elena De Carolis, Elisa Borghi, Monica Falleni, Angela Raffaella Losito, Giuseppe Maiuro, Enrico Maria Trecarichi, Maurizio Sanguinetti, Mario Tumbarello
OBJECTIVES: Biofilm formation (BF) by fungal isolates may dramatically complicate infection. We determined the ability of C. parapsilosis isolates from single fungaemia episodes to form biofilms and we analysed biofilm subgroups for antifungal susceptibility and pathogenic potential. We then correlated BF with clinical characteristics and outcomes of the episodes. METHODS: BF was measured using the crystal-violet biomass assay, antifungal susceptibility of preformed biofilms was assessed, and virulence was studied using the Galleria mellonella model...
November 10, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29131083/the-effect-of-nutritive-and-non-nutritive-sweeteners-on-the-growth-adhesion-and-biofilm-formation-of-candida-albicans-and-candida-tropicalis
#11
Manjula M Weerasekera, Thilini A Jayarathna, Gayan K Wijesinghe, Chinthika P Gunasekara, Neluka Fernando, Nilwala Kottegoda, Lakshman P Samaranayake
OBJECTIVE: To determine the effect of glucose, sucrose, and saccharin on growth, adhesion and biofilm formation of Candida albicans and C.tropicalis. MATERIALS AND METHODS: The growth rates of mono-cultures of planktonic C. albicans and C. tropicalis and co-cultures (1:1), were determined in yeast nitrogen broth supplemented with 5% (30 mM) and 10% (60 mM) of glucose, sucrose, and saccharin, using optical density measurements at 2h intervals over a 14h period. Adhesion and biofilm growth were performed and the growth quantified using standard 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) (MTT) assay...
November 1, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29130039/a-sustained-release-membrane-of-thiazolidinedione-8-effect-on-formation-of-a-candida-bacteria-mixed-biofilm-on-hydroxyapatite-in-a-continuous-flow-model
#12
Mark Feldman, Julia Shenderovich, Eran Lavy, Michael Friedman, Doron Steinberg
Thiazolidinediones (TZDs) have been found to act as effective quorum sensing quenchers, capable of preventing biofilm formation. Our previous studies demonstrated a profound antibiofilm effect of the TZD derivative thiazolidinedione-8 (S-8), either in solution or incorporated into a sustained-release membrane (SRM-S-8) under batch conditions. In the present study, we used a constant depth film fermenter model in order to investigate the impact of SRM-S-8 on mixed C. albicans-S. mutans biofilm development, under flow conditions...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29126739/discovery-of-simplified-sampangine-derivatives-as-novel-fungal-biofilm-inhibitors
#13
Na Liu, Hua Zhong, Jie Tu, Zhigan Jiang, Yanjuan Jiang, Yan Jiang, Yuanying Jiang, Jian Li, Wannian Zhang, Yan Wang, Chunquan Sheng
Lack of novel antifungal agents and severe drug resistance have led to high incidence and associated mortality of invasive fungal infections. To tackle the challenges, novel antifungal agents with new chemotype, fungicidal activity and anti-resistant potency are highly desirable. On the basis of our previously identified simplified analogue of antifungal natural product sampangine, systemic structure-activity relationships were clarified and two novel derivatives showed promising features as novel antifungal lead compounds...
October 16, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29112170/psn-pc-a-novel-antimicrobial-and-anti-biofilm-peptide-from-the-skin-secretion-of-phyllomedusa-camba-with-cytotoxicity-on-human-lung-cancer-cell
#14
Xianhui Wu, Jinhuo Pan, Yue Wu, Xinping Xi, Chengbang Ma, Lei Wang, Mei Zhou, Tianbao Chen
Peptides derived from amphibian skin secretion are promising drug prototypes for combating widespread infection. In this study, a novel peptide belonging to the phylloseptin family of antimicrobial peptides was isolated from the skin secretion of the Phyllomedusa camba, namely phylloseptin-PC (PSN-PC). The biosynthetic precursor was obtained by molecular cloning and the mature peptide sequence was confirmed through tandem mass spectrometry (MS/MS) fragmentation sequencing in the skin secretion. The synthetic replicate exhibited a broad spectrum antimicrobial activity against Staphylococcus aureus, methicillin-resistant Staphylococcus aureus,Escherichia coli, Pseudomonas aeruginosa, Candida albicans at concentrations of 2, 2, 8, 32 and 2 µM, respectively...
November 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29111321/inhibition-activity-of-lactobacilli-supernatant-against-fungal-bacterial-multispecies-biofilms-on-silicone
#15
Yulong Tan, Matthias Leonhard, Doris Moser, Berit Schneider-Stickler
Fungal-bacterial multispecies biofilms play a major role in failure of medical silicone devices, such as voice prostheses in laryngectomiy. In this study, we determined the effect of Lactobacilli supernatant (cell free) on mixed biofilm formation of fungi and bacteria on silicone in vitro. Lactobacilli supernatant inhibited the adhesion (90 min) of mixed fungi and bacteria species with an efficiency of >90%. Mixed biofilm formation and the metabolic activity of the biofilms were inhibited by 72.23% and 58...
October 28, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29107978/encapsulation-of-curcumin-in-polymeric-nanoparticles-for-antimicrobial-photodynamic-therapy
#16
Jeffersson Krishan Trigo Gutierrez, Gabriela Cristina Zanatta, Ana Laura Mira Ortega, Maria Isabella Cuba Balastegui, Paula Volpato Sanitá, Ana Cláudia Pavarina, Paula Aboud Barbugli, Ewerton Garcia de Oliveira Mima
Curcumin (CUR) has been used as photosensitizer in antimicrobial Photodynamic Therapy (aPDT). However its poor water solubility, instability, and scarce bioavalibility hinder its in vivo application. The aim of this study was to synthesize curcumin in polymeric nanoparticles (NP) and to evaluate their antimicrobial photodynamic effect and cytoxicity. CUR in anionic and cationic NP was synthesized using polylactic acid and dextran sulfate by the nanoprecipitation method. For cationic NP, cetyltrimethylammonium bromide was added...
2017: PloS One
https://www.readbyqxmd.com/read/29107946/yeast-casein-kinase-2-governs-morphology-biofilm-formation-cell-wall-integrity-and-host-cell-damage-of-candida-albicans
#17
Sook-In Jung, Natalie Rodriguez, Jihyun Irrizary, Karl Liboro, Thania Bogarin, Marlene Macias, Edward Eivers, Edith Porter, Scott G Filler, Hyunsook Park
The regulatory networks governing morphogenesis of a pleomorphic fungus, Candida albicans are extremely complex and remain to be completely elucidated. This study investigated the function of C. albicans yeast casein kinase 2 (CaYck2p). The yck2Δ/yck2Δ strain displayed constitutive pseudohyphae in both yeast and hyphal growth conditions, and formed enhanced biofilm under non-biofilm inducing condition. This finding was further supported by gene expression analysis of the yck2Δ/yck2Δ strain which showed significant upregulation of UME6, a key transcriptional regulator of hyphal transition and biofilm formation, and cell wall protein genes ALS3, HWP1, and SUN41, all of which are associated with morphogenesis and biofilm architecture...
2017: PloS One
https://www.readbyqxmd.com/read/29104569/a-linear-19-mer-plant-defensin-derived-peptide-acts-synergistically-with-caspofungin-against-candida-albicans-biofilms
#18
Tanne L Cools, Caroline Struyfs, Jan W Drijfhout, Soňa Kucharíková, Celia Lobo Romero, Patrick Van Dijck, Marcelo H S Ramada, Carlos Bloch, Bruno P A Cammue, Karin Thevissen
Public health problems are associated with device-associated biofilm infections, with Candida albicans being the major fungal pathogen. We previously identified potent antibiofilm combination treatment in which the antifungal plant defensin HsAFP1 is co-administered with caspofungin, the preferred antimycotic to treat such infections. In this study, we identified the smallest linear HsAFP1-derived peptide that acts synergistically with caspofungin or anidulafungin against C. albicans as HsLin06_18, a 19-mer peptide derived from the C-terminal part of HsAFP1...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29104052/%C3%AE-1-3-glucanase-disrupts-biofilm-formation-and-increases-antifungal-susceptibility-of-candida-albicans-day185
#19
Yulong Tan, Su Ma, Matthias Leonhard, Doris Moser, Berit Schneider-Stickler
β-1,3-glucan plays a role in Candida biofilm formation and survival of biofilm-forming Candida to stresses. In this study, we evaluated the antibiofilm activity of β-1,3-glucanase, which can degrade poly-β(1→3)-glucose of Candida albicans biofilms. Biofilm was dispersed by 55.96%. β-1,3-glucanase had no effect on Candida planktonic growth as well as adhesion. β-1,3-glucanase markedly enhanced the antifungal susceptibility of fluconazole and amphotericin B. The examination using confocal laser scanning microscopy and scanning electron microscope confirmed the antibiofilm activity of β-1,3-glucanase...
November 2, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29101060/dispersal-of-single-and-mixed-non-albicans-candida-species-biofilms-by-%C3%AE-1-3-glucanase-in-vitro
#20
Yulong Tan, Matthias Leonhard, Su Ma, Doris Moser, Berit Schneider-Stickler
β-1,3-glucan plays a role in non-albicans Candida species biofilm formation and survival of biofilm Candida to stresses. In this study, we evaluated the antibiofilm activity of β-1,3-glucanase, which can degrade poly-β(1 → 3)-glucose of non-albicans Candida species biofilms, on single and mixed species biofilm of non-albicans Candida species, including Candida tropicalis, Candida parapsilosis and Candida krusei. Biofilm by all tested species in microplate were dispersed more than 60%. β-1,3-glucanase also detached mixed species biofilm in microplate and on medical material surface...
November 1, 2017: Microbial Pathogenesis
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