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https://www.readbyqxmd.com/read/28930236/antibacterial-and-antifungal-activity-of-essential-oils-against-pathogens-responsible-for-otitis-externa-in-dogs-and-cats
#1
Valentina V Ebani, Simona Nardoni, Fabrizio Bertelloni, Basma Najar, Luisa Pistelli, Francesca Mancianti
Background: Essential oils (EOs) are recommended by some veterinarians to treat otitis externa in pets, but data about their efficacy in scientific literature are very scant. Methods: Nine commercial EOs, from roman chamomile (Anthemis nobilis L.), star anise (Illicium verum), lavender (Lavandula hybrida), litsea (Litsea cubeba (Lour.) Pers.), basil (Ocimum basilicum L.), oregano (Origanum vulgare L. subsp. hirticum), rosemary (Rosmarinus officinalis L.), clary sage (Salvia sclarea L.), and thyme (Thymus vulgaris L...
April 21, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930232/antimicrobial-antioxidant-and-cytotoxic-activities-of-ocimum-forskolei-and-teucrium-yemense-lamiaceae-essential-oils
#2
Nasser A Awadh Ali, Bhuwan K Chhetri, Noura S Dosoky, Khola Shari, Ahmed J A Al-Fahad, Ludger Wessjohann, William N Setzer
Background:Ocimum forskolei and Teucrium yemense (Lamiaceae) are used in traditional medicine in Yemen. Methods: The chemical composition, antimicrobial, antioxidant and cytotoxic activities of the essential oils isolated from the leaves of Ocimum forskolei Benth. (EOOF) and two different populations of Teucrium yemense Deflers., one collected from Dhamar province (EOTY-d), and another collected from Taiz (EOTY-t) were investigated. The antimicrobial activities of the oils were evaluated against several microorganisms with the disc diffusion test or the broth microdilution test...
April 1, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930221/compounds-from-terminalia-mantaly-l-combretaceae-stem-bark-exhibit-potent-inhibition-against-some-pathogenic-yeasts-and-enzymes-of-metabolic-significance
#3
Marthe Aimée Tchuente Tchuenmogne, Thierry Ngouana Kammalac, Sebastian Gohlke, Rufin Marie Toghueo Kouipou, Abdulselam Aslan, Muslum Kuzu, Veysel Comakli, Ramazan Demirdag, Silvère Augustin Ngouela, Etienne Tsamo, Norbert Sewald, Bruno Ndjakou Lenta, Fabrice Fekam Boyom
Background: Pathogenic yeasts resistance to current drugs emphasizes the need for new, safe, and cost-effective drugs. Also, new inhibitors are needed to control the effects of enzymes that are implicated in metabolic dysfunctions such as cancer, obesity, and epilepsy. Methods: The anti-yeast extract from Terminalia mantaly (Combretaceae) was fractionated and the structures of the isolated compounds established by means of spectroscopic analysis and comparison with literature data. Activity was assessed against Candida albicans, C...
January 24, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28927409/biological-and-physicochemical-properties-of-biosurfactants-produced-by-lactobacillus-jensenii-p6a-and-lactobacillus-gasseri-p65
#4
I M C Morais, A L Cordeiro, G S Teixeira, V S Domingues, R M D Nardi, A S Monteiro, R J Alves, E P Siqueira, V L Santos
BACKGROUND: Lactobacillus species produce biosurfactants that can contribute to the bacteria's ability to prevent microbial infections associated with urogenital and gastrointestinal tracts and the skin. Here, we described the biological and physicochemical properties of biosurfactants produced by Lactobacillus jensenii P6A and Lactobacillus gasseri P65. RESULTS: The biosurfactants produced by L. jensenii P6A and L. gasseri P65 reduced the water surface tension from 72 to 43...
September 19, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28926973/the-influence-of-accelerated-uv-a-and-q-sun-irradiation-on-the-antimicrobial-properties-of-coatings-containing-zno-nanoparticles
#5
Małgorzata Mizielińska, Łukasz Łopusiewicz, Monika Mężyńska, Artur Bartkowiak
The influence of accelerated UV-A and Q-SUN irradiation on the antimicrobial properties of coatings containing ZnO nanoparticles was investigated using a polyethylene (PE) film covering. The results of the study showed that Methyl Hydroxypropyl Celluloses (MHPC) coatings did not influence the growth of S. aureus, B. cereus, E. coli, P. aeruginosa or C. albicans cells. MHPC coatings containing ZnO nanoparticles inhibited the growth of bacterial strains and reduced the number of C. albicans strains. Accelerated Q-SUN and UV-A irradiation had no influence on the antimicrobial effect of nano ZnO coatings against S...
September 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28926764/synthesis-antimicrobial-antiquorum-sensing-antitumor-and-cytotoxic-activities-of-new-series-of-cyclopenta-hepta-b-thiophene-and-fused-cyclohepta-b-thiophene-analogs
#6
Somaya A Abdel-Rahman, Nadia S El-Gohary, Eman R El-Bendary, Saadia M El-Ashry, Mona I Shaaban
New series of cyclopenta(hepta)[b]thiophene and fused cyclohepta[b]thiophene analogs were synthesized. The new analogs were assessed for antibacterial efficacy toward Escherichia coli ATCC 12435, Bacillus cereus UW 85 and Staphylococcus aureus. Compounds 5a, 6b and 12 showed eminent activity toward all selected bacterial strains compared to ampicillin. The antifungal efficacy of the same analogs was also examined toward Candida albicans and Aspergillus fumigatus 293, whereas 5a,b and 12 showed excellent efficacy toward both of the tested fungi...
September 4, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28923602/cell-wall-mannoprotein-of-candida-albicans-induces-cell-cycle-alternation-and-inhibits-apoptosis-of-hacat-cells-via-nf-%C3%AE%C2%BAb-signal-pathway
#7
Yang Han, Hang-Hang Jiang, Yu-Jing Zhang, Xing-Jia Hao, Yu-Zhe Sun, Rui-Qun Qi, Hong-Duo Chen, Xing-Hua Gao
Candida albicans (C. albicans) is a commensal organism in human and a well-known dimorphic opportunistic pathogenic fungus. Though plenty of researches on the pathogenesis of C. albicans have been performed, the mechanism is not fully understood. The cell wall components of C. albicans have been documented to play important roles in its pathogenic processes. To further study the infectious mechanism of C. albicans, we investigated the potential functional role of its cell wall mannoprotein in cell cycle and apoptosis of HaCaT cells...
September 15, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28922415/rewiring-monocyte-glucose-metabolism-via-c-type-lectin-signaling-protects-against-disseminated-candidiasis
#8
Jorge Domínguez-Andrés, Rob J W Arts, Rob Ter Horst, Mark S Gresnigt, Sanne P Smeekens, Jacqueline M Ratter, Ekta Lachmandas, Lily Boutens, Frank L van de Veerdonk, Leo A B Joosten, Richard A Notebaart, Carlos Ardavín, Mihai G Netea
Monocytes are innate immune cells that play a pivotal role in antifungal immunity, but little is known regarding the cellular metabolic events that regulate their function during infection. Using complementary transcriptomic and immunological studies in human primary monocytes, we show that activation of monocytes by Candida albicans yeast and hyphae was accompanied by metabolic rewiring induced through C-type lectin-signaling pathways. We describe that the innate immune responses against Candida yeast are energy-demanding processes that lead to the mobilization of intracellular metabolite pools and require induction of glucose metabolism, oxidative phosphorylation and glutaminolysis, while responses to hyphae primarily rely on glycolysis...
September 18, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28922057/the-dietary-food-components-capric-acid-and-caprylic-acid-inhibit-virulence-factors-in-candida-albicans-through-multitargeting
#9
Ashwini Jadhav, Supriya Mortale, Shivkrupa Halbandge, Priyanka Jangid, Rajendra Patil, Wasudev Gade, Kiran Kharat, Sankunny Mohan Karuppayil
Capric acid and caprylic acid are the dietary food components. They are found to inhibit the virulence factors like morphogenesis, adhesion, and biofilm formation in the human pathogenic yeast Candida albicans. Our study demonstrated that yeast-to-hyphal signal transduction pathways were affected by capric acid and caprylic acid. The expression profile of genes associated with serum-induced morphogenesis showed reduced expressions of Cdc35, Hwp1, Hst7, and Cph1 by the treatment with both the fatty acids. Cell elongation gene, Ece1, was surprisingly downregulated by 5208-fold by the treatment of caprylic acid...
September 18, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28919897/altered-immune-activation-and-il-23-signaling-in-response-to-candida-albicans-in-autoimmune-polyendocrine-syndrome-type-1
#10
Øyvind Bruserud, Eirik Bratland, Alexander Hellesen, Nicolas Delaleu, Håkon Reikvam, Bergithe E Oftedal, Anette S B Wolff
OBJECTIVE: Autoimmune polyendocrine syndrome type 1 (APS-1) is a rare, childhood onset disease caused by mutations in the autoimmune regulator (AIRE) gene. Chronic mucocutaneous candidiasis (CMC) is one of the three major disease components and is, to date, mainly explained by the presence of neutralizing auto-antibodies against cytokines [interleukin (IL)-17A, IL-17F, and IL-22] from T helper 17 cells, which are critical for the protection against fungal infections. However, patients without current auto-antibodies also present CMC and we, therefore, hypothesized that other immune mechanisms contribute to CMC in APS-1...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28917707/amoebicidal-antimicrobial-and-in-vitro-ros-scavenging-activities-of-tunisian-rubus-ulmifolius-schott-methanolic-extract
#11
Soumaya Hajaji, Mohamed Amine Jabri, Ines Sifaoui, Atteneri López-Arencibia, María Reyes-Batlle, Fatma B'chir, Basilio Valladares, José E Pinero, Jacob Lorenzo-Morales, Hafidh Akkari
The present study aimed to evaluate the activity of methanolic extract of Rubus ulmifolius Schott against the Acanthamoeba castellani Neff Strain as well as its antioxidant and antimicrobial effects. The tested extract has a good amoebicidal activity with low IC50 (61.785 ± 1.322 μg/ml) and also has significant activity against both Gram-positive (S. aureus, S. agalactiae) and Gram-negative bacteria (E. coli, S. typhimurium) and against C. albicans. The inhibition zones diameters (IZD) and minimal inhibitory concentration (MIC) values were in the range of 22...
September 13, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28914240/comparison-of-candida-species-isolated-from-children-with-and-without-early-childhood-caries-a-descriptive-cross-sectional-study
#12
M S Beena, Faizal C Peedikayil, M B GufranAfmed, T P Chandru, K Soni, N Dhanesh
BACKGROUND: Early childhood caries (ECC) is characterized by the presence of one or more decayed, missing (due to caries), or filled teeth surfaces in any primary tooth, in a child below 6 years of age. Although ECC is primarily associated with high levels of maternal Streptococcus mutans, there has been an increased interest in finding the relationship between oral fungal flora and dental caries. OBJECTIVE: The aim of the study is to identify and characterize the Candida species and to compare the candidal isolates in children with ECC and without ECC...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28913344/farnesol-inhibits-translation-to-limit-growth-and-filamentation-in-c-albicans-and-s-cerevisiae
#13
Nkechi E Egbe, Tawni O Dornelles, Caroline M Paget, Lydia M Castelli, Mark P Ashe
Candida albicans is a polymorphic yeast where the capacity to switch between yeast and filamentous growth is critical for pathogenicity. Farnesol is a quorum-sensing sesquiterpene alcohol that, via regulation of specific signalling and transcription components, inhibits filamentous growth in Candida albicans. Here we show that farnesol also inhibits translation at the initiation step in both Candida albicans and S. cerevisiae. In contrast to fusel alcohols, that target the eukaryotic initiation factor 2B (eIF2B), farnesol affects the interaction of the mRNA with the small ribosomal subunit leading to reduced levels of the 48S preinitiation ribosomal complex in S...
September 4, 2017: Microbial Cell
https://www.readbyqxmd.com/read/28906457/antibacterial-properties-of-flavonoids-from-kino-of-the-eucalypt-tree-corymbia-torelliana
#14
Motahareh Nobakht, Stephen J Trueman, Helen M Wallace, Peter R Brooks, Klrissa J Streeter, Mohammad Katouli
Traditional medicine and ecological cues can both help to reveal bioactive natural compounds. Indigenous Australians have long used kino from trunks of the eucalypt tree, Corymbia citriodora, in traditional medicine. A closely related eucalypt, C. torelliana, produces a fruit resin with antimicrobial properties that is highly attractive to stingless bees. We tested the antimicrobial activity of extracts from kino of C. citriodora, C. torelliana × C. citriodora, and C. torelliana against three Gram-negative and two Gram-positive bacteria and the unicellular fungus, Candida albicans...
September 14, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28895721/eukaryotic-ribosomal-expansion-segments-as-antimicrobial-targets
#15
Lizzette M Gómez Ramos, Natalya N Degtyareva, Nicholas A Kovacs, Stefany Y Holguin, Liuwei Jiang, Anton S Petrov, Marcin Biesiada, Michael Y Hu, Katarzyna J Purzycka, Dev Priya Arya, Loren Dean Williams
Diversity in eukaryotic rRNA structure and function offers possibilities of novel therapeutic targets. Unlike ribosomes of prokaryotes, eukaryotic ribosomes contain species-specific rRNA expansion segments (ESs) with idiosyncratic structures and functions that are essential and specific to some organisms. Here we investigate expansion segment 7 (ES7), one of the largest and most variable expansions of the eukaryotic ribosome. We hypothesize that ES7 of the pathogenic fungi Candida albicans (ES7CA) could be a prototypic drug target...
September 12, 2017: Biochemistry
https://www.readbyqxmd.com/read/28893786/novel-cell-killing-mechanisms-of-hydroxyurea-and-the-implication-towards-combination-therapy-for-the-treatment-of-fungal-infections
#16
Amanpreet Singh, Ameeta Agarwal, Yong-Jie Xu
We have previously reported that an erg11 mutation affecting ergosterol synthesis and a hem13 mutation in the heme synthesis pathway significantly sensitize the fission yeast Schizosaccahromyces pombe to hydroxyurea (HU) (1, 2). Here we show that treatment with the inhibitors of Erg11 and the heme biosynthesis phenocopies the two mutations in sensitizing wild type cells to HU. Importantly, HU synergistically interacts with the heme biosynthesis inhibitor sampangine and several Erg11 inhibitors, the antifungal azoles, in causing cell lethality...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28893777/modulation-of-staphylococcus-aureus-response-to-antimicrobials-by-the-candida-albicans-quorum-sensing-molecule-farnesol
#17
Eric F Kong, Christina Tsui, Sona Kucharíková, Patrick Van Dijck, Mary Ann Jabra-Rizk
In microbial biofilms, microorganisms utilize secreted signaling chemical molecules to coordinate their collective behavior. Farnesol is a quorum-sensing molecule secreted by the fungal species Candida albicans, shown to play a central physiological role during fungal biofilm growth. Our pervious in vitro and in vivo studies characterized an intricate interaction between C. albicans and the bacterial pathogen Staphylococcus aureus, as these species co-exist in biofilm. In this study, we aimed to investigate the impact of farnesol on S...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28893036/oral-candidal-carriage-in-subjects-with-pure-vegetarian-and-mixed-dietary-habits
#18
Shankargouda Patil, Roopa S Rao, A Thirumal Raj, D S Sanketh, Sachin Sarode, Gargi Sarode
INTRODUCTION: Candida albicans being a part of the normal oral microbial flora is one of the most commonly isolated species from the oral cavity. Recent studies have shown a steady rise in the number of non C. albicans species, which are relatively resistant to common antifungal agents and are being recognized as potential pathogens. It is vital to ascertain the predisposing factors leading to such a shift in the oral candidal flora. AIM: To estimate the prevalence of candidal species among vegetarians and non-vegetarians...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28890996/bacillus-calmette-gu%C3%A3-rin-vaccination-at-birth-and-in-vitro-cytokine-responses-to-non-specific-stimulation-a-randomized-clinical-trial
#19
T N Nissen, N M Birk, B A Blok, R J W Arts, A Andersen, J Kjærgaard, L M Thøstesen, T Hoffmann, D L Jeppesen, S D Nielsen, P-E Kofoed, L G Stensballe, P Aaby, M Ruhwald, M G Netea, C S Benn, O Pryds
Several studies have shown increased in vitro cytokine responses to non-related pathogens after Bacillus Calmette-Guérin (BCG) vaccination. A total of 158 infants (80 BCG administered within 7 days of birth; 78 controls) were bled 4 days post-randomization, and at age 3 and 13 months. Geometric mean concentrations of IL-1β, TNF-α, IL-6 (24 h stimulation) and IFN-γ, IL-10, IL-17, IL-22 (96 h stimulation) in response to in vitro stimulation with RPMI, LPS, PHA, Escherichia coli, Streptococcus pneumoniae, Candida albicans and BCG were compared among BCG vaccinated children and controls...
September 10, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28888760/an-in-vitro-investigation-of-indigenous-south-african-medicinal-plants-used-to-treat-oral-infections
#20
S Akhalwaya, S van Vuuren, M Patel
ETHNOPHARMACOLOGICAL RELEVANCE: Over a 120 South African medicinal plants are used for the treatment of oral diseases. Despite the vast collection of antimicrobial studies being done on South African plants, there is still limited research on pathogens associated with oral infections. In consultation with the available ethnobotanical literature, this study investigates the antimicrobial efficacy of some South African medicinal plants against oral pathogens. AIM OF THE STUDY: To provide a detailed account of the antimicrobial properties of selected South African medicinal plants used traditionally to treat oral infections...
September 7, 2017: Journal of Ethnopharmacology
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