scholarly journals Evaluation of Antifungal Activity and Mechanism of Action of Citral againstCandida albicans

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Maria Clerya Alvino Leite ◽  
André Parente de Brito Bezerra ◽  
Janiere Pereira de Sousa ◽  
Felipe Queiroga Sarmento Guerra ◽  
Edeltrudes de Oliveira Lima
Keyword(s):  
Cell Wall ◽  
Antifungal Activity ◽  
Mechanism Of Action ◽  
Cell Walls ◽  
Inhibitory Concentration ◽  
Minimum Fungicidal Concentration ◽  
Antifungal Potential ◽  
Kill Curve ◽  
Time Kill

Candida albicansis a yeast that commensally inhabits the human body and can cause opportunistic or pathogenic infections.Objective. To investigate the antifungal activity of citral againstC. albicans.Methodology. The minimum inhibitory concentration (MIC) and the minimum fungicidal concentration (MFC) were determined by the broth microdilution techniques. We also investigated possible citral action on cell walls (0.8 M sorbitol), cell membranes (citral to ergosterol binding), the time-kill curve, and biological activity on the yeast’s morphology.Results. The MIC and MFC of citral were, respectively, 64 µg/mL and 256 µg/mL. Involvement with the cell wall and ergosterol binding were excluded as possible mechanisms of action. In the morphological interference assay, it was observed that the product inhibited pseudohyphae and chlamydoconidia formation. The MIC and the MFC of citral required only 4 hours of exposure to effectively kill 99.9% of the inoculum.Conclusion. Citral showedin vitroantifungal potential against strains ofC. albicans. Citral’s mechanism of action does not involve the cell wall or ergosterol, and further study is needed to completely describe its effects before being used in the future as a component of new antifungals.

scholarly journals 7-Chloroquinolin-4-yl Arylhydrazone Derivatives: Synthesis and Antifungal Activity

2011 ◽  
Vol 11 ◽  
pp. 1489-1495 ◽  
Author(s):  
Auri R. Duval ◽  
Pedro H. Carvalho ◽  
Maieli C. Soares ◽  
Daniela P. Gouvêa ◽  
Geonir M. Siqueira ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Rational Design ◽  
Antifungal Agents ◽  
Inhibitory Concentration ◽  
First Line ◽  
Minimum Fungicidal Concentration ◽  
Starting Point ◽  
Line Drug ◽  
In Vitro Antifungal Activity

Fifteen 7-chloro-4-arylhydrazonequinolines have been evaluated for their in vitro antifungal activity against eight oral fungi:Candida albicans, C. parapsilosis, C. lipolytica, C. tropicalis, C. famata, C. glabrata, Rhodutorula mucilaginosa, andR. glutinis. Several compounds exhibited minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) activities comparable with the first-line drug fluconazole. These results could be considered as an important starting point for the rational design of new antifungal agents.

scholarly journals Uji Aktivitas Antifungi Ekstrak Rimpang Kencur (Kaempferia galanga L.) Terhadap Saprolegnia sp. Secara In Vitro [Antifungal Activity Test Of Kaempferia galanga L. Extract To Saprolegnia sp. By In Vitro]

2019 ◽  
Vol 5 (1) ◽  
pp. 23
Author(s):  
Rahayu Kusdarwati, Ayu Ratnaningtyas, Dewa Ketut Meles
Keyword(s):  
Minimum Inhibitory Concentration ◽  
Antifungal Activity ◽  
Inhibitory Concentration ◽  
Positive Control ◽  
Negative Control ◽  
Fresh Water Fish ◽  
Minimum Fungicidal Concentration ◽  
Kaempferia Galanga ◽  
Activity Test

Abstract Saprolegnia sp. is a fungus that causes the Saprolegniasis disease can infection eggs and fresh water fish. Treatment Saprolegniasis done using chemical drugs, however the use of drugs is bad for the environment and biota. The purpose of the research was to determined the antifungal activity include a minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) from Kaempferia galanga L. to Saprolegnia sp. by in vitro. This research used 9 different concentrations of Kaempferia galanga L extract were 50%, 12.5%, 6.25%, 3.12%, 1.56%, 0.78%, 0, 39%, 0.2%, positive control used H2O2 3% and negative control used DMSO 10%. The results showed that the extract of Kaempferia galanga L had an antifungal activity were inhibits and kill with minimum inhibitory concentration (MIC) was 0.39% equivalen with 3,9 mg/ml and minimu fungicidal concentration (MBC) was 1.56% equivalen with 15,6 mg/ml. The existence of antifungal activity against Saprolegnia sp. by in vitro caused by some active compounds from the extracts of the Kaempferia galanga L. are polyphenolic compounds, flavonoin, saponins and essential oils.

scholarly journals Antifungal Activity of Plumericin and Isoplumericin

2011 ◽  
Vol 6 (11) ◽  
pp. 1934578X1100601 ◽  
Author(s):  
Dharmendra Singh ◽  
Umakant Sharma ◽  
Parveen Kumar ◽  
Yogesh K Gupta ◽  
M. P. Dobhal ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Minimum Inhibitory Concentration ◽  
Antifungal Activity ◽  
Cryptococcus Neoformans ◽  
Inhibitory Concentration ◽  
Chloroform Extract ◽  
Drug Candidate ◽  
Minimum Fungicidal Concentration ◽  
In Vitro Antifungal Activity

This study evaluated the in vitro antifungal activity of the chloroform extract of Plumeria bicolor and its phytoconstituents plumericin and isoplumericin against Candida species and Cryptococcus neoformans by measuring the Minimum Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration (MFC). Plumericin's consistently high activity against Candida albicans, C. krusei, C. glabrata, C. tropicalis and Cryptococcus neoformans was more potent than isoplumericin and the standard antifungal drug nystatin suggesting its potential as a drug candidate for candidiasis and cryptococcosis.

scholarly journals Antifungal Activity of Geraniol on Candida albicans Isolates of Pediatric Clinical Importance

2017 ◽  
Vol 9 (4) ◽  
Author(s):  
Lima A L A ◽  
Pérez A L A L ◽  
Sousa J P ◽  
Pinheiro L S ◽  
Oliveira-Filho A A ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Minimum Inhibitory Concentration ◽  
Antifungal Activity ◽  
Cell Walls ◽  
Cell Membranes ◽  
Inhibitory Concentration ◽  
Clinical Importance ◽  
Broth Microdilution ◽  
Antifungal Effect ◽  
Minimum Fungicidal Concentration

Geraniol is a plant-derived monoterpene alcohol that has antifungal effect. The aim of this study was to evaluate the geraniol for antifungal activity against Candida albicans isolates of pediatric clinical importance. The minimum inhibitory concentration (MIC) and the minimum fungicidal concentration (MFC) were determined by the broth microdilution techniques. We also investigated possible geraniol action on cell walls (0.8M sorbitol) and cell membranes (Geraniol to ergosterol binding). For 90% of isolates, the MIC and MFC of the phytochemical was 64

scholarly journals 3,5-Disubstituted Thiazolidine-2,4-Diones: Design, Microwave-Assisted Synthesis, Antifungal Activity, and ADMET Screening

2018 ◽  
Vol 23 (8) ◽  
pp. 807-814 ◽  
Author(s):  
Gabriel Marc ◽  
Anca Stana ◽  
Adrian Pîrnău ◽  
Laurian Vlase ◽  
Dan C. Vodnar ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Inhibitory Concentration ◽  
Docking Study ◽  
Docking Studies ◽  
Microwave Assisted Synthesis ◽  
Molecular Fragments ◽  
In Silico Screening ◽  
Minimum Fungicidal Concentration ◽  
Microwave Assisted

A series of 12 new thiazolidine-2,4-dione derivatives were obtained by microwave-assisted synthesis. All compounds were physicochemically characterized by quantitative elemental C, H, N, S analysis and spectral data (mass spectrometry [MS], infrared [IR], and nuclear magnetic resonance [NMR]), with the results being in agreement with the expected data. An in vitro screening performed on Candida albicans ATCC 10231 showed their moderate antifungal activity, which was further investigated by determining the minimum inhibitory concentration and minimum fungicidal concentration values for the most active compounds on four strains of Candida. The molecular docking studies, performed against a fungal lanosterol 14α-demethylase, emphasized the importance of different molecular fragments in the compounds’ structures for their antifungal activity. The synthesized compounds were subjected to in silico screening for the prediction of their absorption, distribution, metabolism, excretion, and toxicity (ADMET) and molecular properties. The results of the antifungal activity assays, docking study, and ADMET predictions revealed that the synthesized compounds are potential anti- Candida agents that might act by interacting with the fungal lanosterol 14α-demethylase and could be further optimized and developed as antifungal agents.

scholarly journals IN VITRO ANTIFUNGAL ACTIVITY OF TIMOL AND CARVACROL ON CANDIDA SPECIES

2019 ◽  
Vol 4 ◽  
Author(s):  
Luciana Thaís Rangel Souza ◽  
Cecília Correia Costa ◽  
Mateus Cardoso Oliveira ◽  
Isabel Celeste Caires Pereira Gusmão
Keyword(s):  
Candida Albicans ◽  
Antifungal Activity ◽  
Inhibitory Concentration ◽  
Candida Krusei ◽  
Minimum Fungicidal Concentration ◽  
Sabouraud Agar ◽  
In Vitro Antifungal Activity

Aim: to evaluate the in vitro action of thymol and carvacrol against the yeasts of Candida albicans ATCC10231 and Candida krusei ATCC34135. Method: A laboratory study was performed to evaluate antifungal activity. The characterization of the Minimal Inhibitory Concentration (MIC) of the thymol essential oil was carried out using the technique where the microdilution is performed, in which a plate containing 96 wells is used. The determination of the Minimum Fungicidal Concentration (MFC) was performed by dripping 10 μL of each of the concentrations evaluated on Sabouraud agar plates. Results: The MIC of thymol and carvacrol for C. albicans was 40 μg/mL and for Candida krusei it did not present antifungal activity. While the MIC of nystatin was 0.03mg for both species with thymol and carvacrol. Conclusion: Thymol presented satisfactory antifungal activity against the pathogens studied, but carvacrol did not present antifungal activity.

scholarly journals Chemical and cytotoxic analyses of three varieties of Brazilian propolis (green propolis, jataí propolis and brown propolis) and its anti-Sporothrix brasiliensis in vitro activity

2019 ◽  
Vol 71 (3) ◽  
pp. 819-827
Author(s):  
C.M. Peter ◽  
S.B. Waller ◽  
T. Picoli ◽  
L.G. Osório ◽  
J.L. Zani ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
High Performance ◽  
Inhibitory Concentration ◽  
Chemical Compounds ◽  
Coumaric Acid ◽  
Minimum Fungicidal Concentration ◽  
Sporothrix Brasiliensis ◽  
Ethanolic Extraction ◽  
Brazilian Propolis

ABSTRACT In this study, we described the antifungal activity of three Brazilian propolis extracts: brown, green and from jataí bees against Sporothrix brasiliensis. The extracts were obtained from ethanolic extraction and their chemical composition was determined by high-performance liquid chromatography coupled to mass spectrometry. The cellular toxicity was measured in MDBK (Madin-Darby Bovine Kidney) cells and quantified by the MTT assay (3- (4,5 dimethylthiazol-2yl -2,5-diphenyl-2H bromine tetrazolato). For antifungal activity, the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) were determined by broth microdilution. The results showed that cell toxicity was not observed at lower concentrations (0.097 to 0.39μg/ml) for all extracts in comparison to cell control. Among the chemical compounds identified, caffeic acid, p-coumaric acid, chlorogenic acid, ferulic acid and rutin were quantified. In antifungal activity, green and jataí did not exhibit activity against the isolates (MIC and MFC greater than 0.78mg/ml). However, all isolates of S. brasiliensis were sensitive to brown propolis (MIC of 0.09 to 0.78mg/ml), including the standard strain (P<0.001). Among the Brazilian propolis studied, the brown propolis showed activity against the S. brasiliensis isolates and more studies should be undertaken in order to evaluate its promising use in the treatment of sporotrichosis.

scholarly journals Time-Kill Kinetics of Rezafungin (CD101) in Vagina-Simulative Medium for Fluconazole-Susceptible and Fluconazole-ResistantCandida albicansand Non-albicans CandidaSpecies

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Jeffrey B. Locke ◽  
Amanda L. Almaguer ◽  
Joanna L. Donatelli ◽  
Ken F. Bartizal
Keyword(s):  
Antifungal Activity ◽  
Fungicidal Activity ◽  
Susceptibility Testing ◽  
Inhibitory Concentration ◽  
The Novel ◽  
Testing Conditions ◽  
Fluconazole Resistant ◽  
Time Kill ◽  
Kinetics Of

Background.While echinocandins demonstrate excellent efficacy againstCandidaspecies in disseminated infections and demonstrate potent minimal inhibitory concentration (MIC) values under standard susceptibility testing conditions, investigation under conditions relevant to the vaginal environment was needed. We assessed the antifungal activity and time-kill kinetics of the novel echinocandin rezafungin (formerly CD101) under such conditions, againstCandidaspecies relevant to vulvovaginal candidiasis (VVC).Methods. Susceptibility testing of fluconazole-susceptible and fluconazole-resistantC. albicans,C. glabrata,C. tropicalis,C. parapsilosis, andC. kruseiwas performed in RPMI at pH 7.0 and in vagina-simulative medium (VSM) at pH 4.2 for topical rezafungin, terconazole, fluconazole, and amphotericin B. Time-kill kinetics were evaluated for rezafungin and terconazole at 2, 8, 32, and 128 μg/ml over 72 hours.Results.Rezafungin MIC values were the same or 2-fold higher in VSM/pH 4.2 versus RPMI/pH 7.0. SomeC. albicansterconazole MIC values were lower, but most were significantly higher in VSM than in RPMI. Rezafungin was fungicidal against 11/14 strains and near-fungicidal against the others. Terconazole (128 μg/ml) was fungicidal againstC. kruseiand near-fungicidal against susceptibleC. parapsilosisbut fungistatic versus all other strains evaluated.Conclusion.Rezafungin retained anti-Candidaactivity and fungicidal activity under in vitro conditions relevant to VVC.

scholarly journals Co-operative action by endo- and exo-β-(1→3)-glucanases from parasitic fungi in the degradation of cell-wall glucans of Sclerotinia sclerotiorum (Lib.) de Bary

1974 ◽  
Vol 140 (1) ◽  
pp. 47-55 ◽  
Author(s):  
David Jones ◽  
Alex. H. Gordon ◽  
John S. D. Bacon
Keyword(s):  
Cell Wall ◽  
Sclerotinia Sclerotiorum ◽  
Culture Filtrate ◽  
Cell Walls ◽  
Trichoderma Viride ◽  
Major Constituent ◽  
Coniothyrium Minitans ◽  
Parasitic Fungi ◽  
Complete Breakdown

1. Two fungi, Coniothyrium minitans Campbell and Trichoderma viride Pers. ex Fr., were grown on autoclaved crushed sclerotia of the species Sclerotinia sclerotiorum, which they parasitize. 2. in vitro the crude culture filtrates would lyse walls isolated from hyphal cells or the inner pseudoparenchymatous cells of the sclerotia, in which a branched β-(1→3)-β-(1→6)-glucan, sclerotan, is a major constituent. 3. Chromatographic fractionation of the enzymes in each culture filtrate revealed the presence of several laminarinases, the most active being an exo-β-(1→3)-glucanase, known from previous studies to attack sclerotan. Acting alone this brought about a limited degradation of the glucan, but the addition of fractions containing an endo-β-(1→3)-glucanase led to almost complete breakdown. A similar synergism between the two enzymes was found in their lytic action on cell walls. 4. When acting alone the endo-β-(1→3)-glucanase had a restricted action, the products including a trisaccharide, tentatively identified as 62-β-glucosyl-laminaribiose. 5. These results are discussed in relation to the structure of the cell walls and of their glucan constituents.

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