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Candida albicans biofilm

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https://www.readbyqxmd.com/read/29050256/in-vitro-and-in-vivo-effects-of-suloctidil-on-growth-and-biofilm-formation-of-the-opportunistic-fungus-candida-albicans
#1
Beini Zeng, Jiachen Li, Yajie Wang, Pengxiang Chen, Xiaohong Wang, Jianfeng Cui, Lidong Liu, Xiaoyan Hu, Qian Cao, Ying Xiao, Junlu Dong, Yundong Sun, Yabin Zhou
As the most frequent fungal pathogen in humans, Candida albicans can develop serious drug resistance because its biofilms are resistant to most antifungal agents; this leads to an urgent need to develop novel antifungals. Here, we evaluated the efficacy of an antithrombotic drug, suloctidil, against C. albicans biofilms in vitro and in vivo. We found that suloctidil is effective to inhibit C. albicans biofilm, with a minimum inhibitory concentration (MIC80) of 4 μg/mL, a biofilm inhibiting concentration (BIC80) of 16 μg/mL and a biofilm eradicating concentration (BEC80) of 64 μg/mL...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29047302/a-self-assembled-clavanin-a-coated-amniotic-membrane-scaffold-for-the-prevention-of-biofilm-formation-by-ocular-surface-fungal-pathogens
#2
Santi M Mandal, Jahangir Khan, Denial Mahata, Suman Saha, Jayangshu Sengupta, Osmar N Silva, Subhayan Das, Mahitosh Mandal, Octavio L Franco
Amniotic membrane (AM) is frequently used in ophthalmologic surgery for rapid ocular surface reconstruction. Sometimes it may create a major problem with associated infections after biofilm formation over the membrane. To overcome this problem, AM was coated with the antimicrobial peptide clavanin A. The antifungal activity of clavanin A in the native and self-assembled form was determined against the common ocular surface pathogens Candida albicans, Aspergillus fumigatus, Alternaria sp. and Fusarium sp. Biofilm formation over the coated surface was significantly reduced in comparison with the uncoated membrane...
October 19, 2017: Biofouling
https://www.readbyqxmd.com/read/29047237/proteus-vulgaris-and-proteus-mirabilis-decrease-candida-albicans-biofilm-formation-by-suppressing-morphological-transition-to-its-hyphal-form
#3
Kyoung Ho Lee, Su Jung Park, Sun Ju Choi, Joo Young Park
PURPOSE: Candida albicans (C. albicans) and Proteus species are causative agents in a variety of opportunistic nosocomial infections, and their ability to form biofilms is known to be a virulence factor. In this study, the influence of co-cultivation with Proteus vulgaris (P. vulgaris) and Proteus mirabilis (P. mirabilis) on C. albicans biofilm formation and its underlying mechanisms were examined. MATERIALS AND METHODS: XTT reduction assays were adopted to measure biofilm formation, and viable colony counts were performed to quantify yeast growth...
November 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29038271/evaluation-of-antifungal-efficacy-of-three-new-cyclic-lipopeptides-of-the-class-bacillomycin-from-bacillus-subtilis-rlid-12-1
#4
Ramya R, Manjari Shrivastava, Namitha N N, Ram Lal Thakur, Arunaloke Chakrabarti, Utpal Roy
New lipopeptide homologues (AF3, AF4 and AF5) with antifungal activities against Candida and Cryptococcus spp. were purified from the cell free supernatant of Bacillus subtilis RLID 12.1. The lipopeptides AF3, AF4 and AF5 were identified with the same peptide sequence Asn-Pro-Tyr-Asn-Gln-Thr-Ser with variations in the fatty acid branching type and chain length (anteiso-C17, iso-C17 and iso-C18 respectively). Comparing the three homologues for minimum inhibitory concentrations (MIC) against 81 Candida (64 no...
October 16, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29031236/inhibitory-effect-of-probiotic-lactobacilli-supernatants-on-single-and-mixed-non-albicans-candida-species-biofilm
#5
Yulong Tan, Matthias Leonhard, Doris Moser, Su Ma, Berit Schneider-Stickler
OBJECTIVES: Oral candidiasis is one of the most common human fungal infections. While most cases of the Candida species isolated from the oral cavity are Candida albicans, a large number of candidiasis is attributed to non-albicans Candida species. In this study, we aim to evaluate the in vitro inhibition of supernatants of Lactobacillus gasseri and Lactobacillus rhamnosus on the single and mixed species biofilm of non-albicans Candida species, including Candida tropicalis, Candida krusei and Candida parapsilosis...
October 6, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29031224/direct-one-pot-synthesis-of-cinnamaldehyde-immobilized-on-gold-nanoparticles-and-their-antibiofilm-properties
#6
Mohankandhasamy Ramasamy, Jin-Hyung Lee, Jintae Lee
The objective of the present study was to develop a one-pot strategy to synthesis gold nanoparticle complexes using cinnamaldehyde, a potent antibiofilm agent which in its free form, exhibits high volatility and unstable nature. Hence, we developed cinnamaldehyde gold nanoparticles (CGNPs) in a single step to overcome the limitations of free cinnamaldehyde. Furthermore, reduction abilities of cinnamaldehyde under different experimental conditions, that is, varying precursor concentrations of cinnamaldehyde and gold, metal salts, pH, temperature, and light sources, were investigated...
October 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29030182/biosynthesis-of-dextran-by-weissella-confusa-and-its-in-vitro-functional-characteristics
#7
Irina Rosca, Anca Roxana Petrovici, Dragos Peptanariu, Alina Nicolescu, Gianina Dodi, Mihaela Avadanei, Iuliu Cristian Ivanov, Andra Cristina Bostanaru, Mihai Mares, Diana Ciolacu
The aim of this study was to monitor the influence of the fermentation conditions on the exopolysaccharides (EPS) biosynthesis. For this, different culture media compositions were tested on an isolated lactic acid bacteria (LAB) strain, identified by 16S rDNA sequence as being Weissella confusa. It was proved that this bacterial strain culture in MRS medium supplemented with 80g/L sucrose and dissolved in UHT milk produced up to 25.2g/L of freeze-dried EPS, in static conditions, after 48hours of fermentative process...
October 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29026306/enhanced-antifungal-activity-of-voriconazole-loaded-nanostructured-lipid-carriers-against-candida-albicans-with-a-dimorphic-switching-model
#8
Baocheng Tian, Qi Yan, Juan Wang, Chen Ding, Sixiang Sai
Candida commonly adheres to implanted medical devices and forms biofilms. Due to the minimal activity of current antifungals against biofilms, new drugs or drug-delivery systems to treat these persistent infections are urgently needed. In the present investigation, voriconazole-loaded nanostructured lipid carriers (Vrc-NLCs) were formulated for enhanced drug-delivery efficiency to C. albicans to increase the antifungal activity of Vrc and to improve the treatment of infectious Candida diseases. Vrc-NLCs were prepared by a hot-melt, high-pressure homogenization method, and size distribution, ζ-potential, morphology, drug-encapsulation efficiency, drug loading, and physical stability were characterized...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29016613/quantification-of-carious-pathogens-in-the-interdental-microbiota-of-young-caries-free-adults
#9
Denis Bourgeois, Alexandra David, Camille Inquimbert, Paul Tramini, Nicolas Molinari, Florence Carrouel
BACKGROUND: The majority of caries lesions in adults occur on the proximal tooth surfaces of the posterior teeth. A comprehensive study of the composition of the oral microbiota is fundamental for a better understanding of the etiology of interdental caries. METHODS: Twenty-five caries-free subjects (20-35 years old) were enrolled in the study. The interdental biofilm of four interdental sites were collected. The real-time polymerase chain reaction (PCR) methodology were used to quantify (i) the following bacteria: Streptococcus spp...
2017: PloS One
https://www.readbyqxmd.com/read/28990144/biofilm-formation-by-candida-albicans-is-inhibited-by-photodynamic-antimicrobial-chemotherapy-pact-using-chlorin-e6-increase-in-both-ros-production-and-membrane-permeability
#10
Moisés Lopes Carvalho, Ana Paula Pinto, Leandro José Raniero, Maricilia Silva Costa
Candida albicans is an opportunistic fungal producing both superficial and systemic infections in immunocompromised patients. Furthermore, it has been described an increase in the frequency of infections which have become refractory to standard antifungal therapy. Photodynamic antimicrobial chemotherapy (PACT) is a potential antimicrobial therapy that combines visible light and a nontoxic dye, known as a photosensitizer, producing reactive oxygen species (ROS) that can kill the treated cells. The objective of this study was to investigate the effects of PACT, using chlorin e6, as a photosensitizer on C...
October 9, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28989089/fungal-mitochondrial-oxygen-consumption-induces-the-growth-of-strict-anaerobic-bacteria
#11
Joost M Lambooij, Michel A Hoogenkamp, Bernd W Brandt, Marleen M Janus, Bastiaan P Krom
Fungi are commonly encountered as part of a healthy oral ecosystem. Candida albicans is the most often observed and investigated fungal species in the oral cavity. The role of fungi in the oral ecosystem has remained enigmatic for decades. Recently, it was shown that C. albicans, in vitro, influences the bacterial composition of young oral biofilms, indicating it possibly plays a role in increasing diversity in the oral ecosystem. C. albicans favored growth of strictly anaerobic species under aerobic culture conditions...
October 5, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28988900/biofilm-forming-capacity-of-blood-borne-candida-albicans-strains-and-effects-of-antifungal-agents
#12
Hanni Turan, Müge Demirbilek
Infections related to Candida albicans biofilms and subsequent antifungal resistance have become more common with the increased use of indwelling medical devices. Regimens for preventing fungal biofilm formation are needed, particularly in high-risk patients. In this study, we investigated the biofilm formation rate of multiple strains of Candida albicans (n=162 clinical isolates), their antifungal susceptibility patterns, and the efficacy of certain antifungals for preventing biofilm formation. Biofilm formation was graded using a modified Christensen's 96-well plate method...
October 5, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28987620/evaluation-of-culture-conditions-for-mixed-biofilm-formation-with-clinically-isolated-non-albicans-candida-species-and-staphylococcus-epidermidis-on-silicone
#13
Yulong Tan, Matthias Leonhard, Berit Schneider-Stickler
Silicone is frequently used in clinical and medical fields for medical devices. Mixed biofilms composed of Candida and bacterial species causes frequently failure of medical silicone devices, In this in vitro study, we analyzed mixed biofilm formation of clinically isolated non-albicans Candida species and Staphylococcus epidermidis, including Candida tropicalis, Candida krusei and Candida parapsilosis under the influence of different growth media (RPMI 1640, BHI and TSB) and several culture variables (incubation period, feeding conditions and FBS)...
October 5, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28983822/in-vitro-activity-of-micafungin-against-biofilms-of-candida-albicans-candida-glabrata-and-candida-parapsilosis-at-different-stages-of-maturation
#14
Małgorzata Prażyńska, Tomasz Bogiel, Eugenia Gospodarek-Komkowska
Candida spp. is able to form a biofilm, which is considered resistant to the majority of antifungals used in medicine. The aim of this study was to evaluate the in vitro activity of micafungin against Candida spp. biofilms at different stages of their maturation (2, 6, and 24 h). We assessed the inhibitory effect of micafungin against 78 clinical isolates of Candida spp., growing as planktonic or sessile cells, by widely recommended broth microdilution method. The in vitro effect on sessile cells viability was evaluated by colorimetric reduction assay...
October 5, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28983472/aspartic-proteases-and-major-cell-wall-components-in-candida-albicans-trigger-the-release-of-neutrophil-extracellular-traps
#15
Marcin Zawrotniak, Oliwia Bochenska, Justyna Karkowska-Kuleta, Karolina Seweryn-Ozog, Wataru Aoki, Mitsuyoshi Ueda, Andrzej Kozik, Maria Rapala-Kozik
Neutrophils use different mechanisms to cope with pathogens that invade the host organism. The most intriguing of these responses is a release of neutrophil extracellular traps (NETs) composed of decondensed chromatin and granular proteins with antimicrobial activity. An important potential target of NETs is Candida albicans-an opportunistic fungal pathogen that employs morphological and phenotype switches and biofilm formation during contact with neutrophils, accompanied by changes in epitope exposition that mask the pathogen from host recognition...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28982395/pseudomonas-phage-inhibition-of-candida-albicans
#16
Hasan Nazik, Lydia-Marie Joubert, Patrick R Secor, Johanna M Sweere, Paul L Bollyky, Gabriele Sass, Lynette Cegelski, David A Stevens
Pseudomonas aeruginosa (Pa) and Candida albicans (Ca) are major bacterial and fungal pathogens in immunocompromised hosts, and notably in the airways of cystic fibrosis patients. The bacteriophages of Pa physically alter biofilms, and were recently shown to inhibit the biofilms of Aspergillus fumigatus. To understand the range of this viral-fungal interaction, we studied Pa phages Pf4 and Pf1, and their interactions with Ca biofilm formation and preformed Ca biofilm. Both forms of Ca biofilm development, as well as planktonic Ca growth, were inhibited by either phage...
October 6, 2017: Microbiology
https://www.readbyqxmd.com/read/28974618/disarming-fungal-pathogens-bacillus-safensis-inhibits-virulence-factor-production-and-biofilm-formation-by-cryptococcus-neoformans-and-candida-albicans
#17
François L Mayer, James W Kronstad
Bacteria interact with each other in nature and often compete for limited nutrient and space resources. However, it is largely unknown whether and how bacteria also interact with human fungal pathogens naturally found in the environment. Here, we identified a soil bacterium, Bacillus safensis, which potently blocked several key Cryptococcus neoformans virulence factors, including formation of the antioxidant pigment melanin and production of the antiphagocytic polysaccharide capsule. The bacterium also inhibited de novo cryptococcal biofilm formation but had only modest inhibitory effects on already formed biofilms or planktonic cell growth...
October 3, 2017: MBio
https://www.readbyqxmd.com/read/28971316/resveratrol-pterostilbene-and-baicalein-plant-derived-anti-biofilm-agents
#18
Irena Kolouchová, Olga Maťátková, Martina Paldrychová, Zdeněk Kodeš, Eva Kvasničková, Karel Sigler, Alena Čejková, Jan Šmidrkal, Kateřina Demnerová, Jan Masák
Microbial adhesion to surfaces and the subsequent biofilm formation may result in contamination in food industry and in healthcare-associated infections and may significantly affect postoperative care. Some plants produce substances with antioxidant and antimicrobial properties that are able to inhibit the growth of food-borne pathogens. The aim of our study was to evaluate antimicrobial and anti-biofilm effect of baicalein, resveratrol, and pterostilbene on Candida albicans, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Escherichia coli...
October 2, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28970174/antimicrobial-and-antibiofilm-activities-of-nanoemulsions-containing-eucalyptus-globulus-oil-against-pseudomonas-aeruginosa-and-candida-spp
#19
Priscilla Maciel Quatrin, Camila Marina Verdi, Márcia Ebling de Souza, Samantha Nunes de Godoi, Bruna Klein, Andre Gundel, Roger Wagner, Rodrigo de Almeida Vaucher, Aline Ferreira Ourique, Roberto Christ Vianna Santos
Candida species are the main responsible microorganisms for causing fungal infections worldwide, and Candida albicans is most frequently associated with infectious processes. Pseudomonas aeruginosa is a gram-negative bacterium commonly found in immunocompromised patients. The infection persistence caused by these microorganisms is often related to antimicrobial resistance and biofilm formation. In this context, the objective of the present study was to prepare and characterize nanoemulsions containing Eucalyptus globulus oil and to verify its antimicrobial and antibiofilm activities against P...
September 29, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28963589/influence-of-pre-irradiation-time-employed-in-antimicrobial-photodynamic-therapy-with-diode-laser
#20
Ana Caroline Fumes, Priscilla Coutinho Romualdo, Rachel Maciel Monteiro, Evandro Watanabe, Silmara Aparecida Milori Corona, Maria Cristina Borsatto
The aim of the present study was to evaluate, in vitro, the effect of different pre-irradiation times of the photosensitizer in photodynamic therapy in biofilms formed by Streptococcus mutans and Candida albicans, through the evaluation of the microbial load. The factors under study were as follows: times of pre-irradiation of the photosensitizer in three levels (1, 2, or 5 min). For the control of the cariogenic dental biofilm with antimicrobial photodynamic therapy (aPDT), methylene blue (0.01%) was used in association with the diode laser (InGaAlP) with a wavelength of 660 nm...
September 30, 2017: Lasers in Medical Science
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