Quorum Sensing
Mostrando 1-12 de 380 artigos, teses e dissertações.
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1. Anti-Candida and anti-quorum sensing activity of airborne microorganisms detected by a rapid method
Abstract INTRODUCTION: Introducing new antibiotics to the clinic is critical. METHODS: We adapted a plate method described by Kawaguchi and coworkers in 20131 for detecting inhibitory airborne microorganisms. RESULTS: We obtained 51 microbial colonies antagonist to Chromobacterium violaceum, purified and retested them, and of these, 39 (76.5%) were con
Rev. Soc. Bras. Med. Trop.. Publicado em: 17/01/2019
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2. Quorum sensing LuxS/autoinducer-2 inhibits Enterococcus faecalis biofilm formation ability
Abstract Objective: To investigate the relation between biofilm formation ability and quorum sensing gene LuxS/AI-2. Materials and Methods: Enterococcus faecalis (E. faecalis) standard strain ATCC 29212 was used in the study. Long flanking homology polymerase chain reaction method was used to build the LuxS gene knockout strain. Sequential culture turbidit
J. Appl. Oral Sci.. Publicado em: 04/10/2018
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3. Anti-Quorum Sensing Potential of Antioxidant Quercetin and Resveratrol
ABSTRACT Quorum sensing system plays an active role in the regulation of pathogenicity of many microorganisms. Inhibition of pathogenicity or virulence factors will increase the success of treatment by preventing the development of antibiotic resistance. In this study, anti-quorum sensing activities of quercetin and resveratrol compounds, which have antioxid
Braz. arch. biol. technol.. Publicado em: 25/06/2018
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4. Biofilm production by clinical isolates of Pseudomonas aeruginosa and structural changes in LasR protein of isolates non biofilm-producing
ABSTRACT Introduction: Biofilm production is an important mechanism for the survival of Pseudomonas aeruginosa and its relationship with antimicrobial resistance represents a challenge for patient therapeutics. P. aeruginosa is an opportunistic pathogen frequently associated to nosocomial infections, especially in imunocompromised hosts. Objectives: Analyz
Braz J Infect Dis. Publicado em: 2018-03
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5. Quorum sensing em cepas de Enterococcus faecium, Enterococcus faecalis e Bacillus cereus isoladas do processamento de ricota
RESUMO: O fenômeno quorum sensing corresponde a um processo de comunicação intra e interespécies microbianas e é mediado por sinais químicos extracelulares, denominados moléculas sinalizadoras ou auto indutoras (AI). A molécula AI2 está envolvida na comunicação interespécies, denominada sistema “universal” de comunicação. Este estudo teve c
Cienc. Rural. Publicado em: 08/02/2018
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6. Roles of quorum sensing molecules from Rhizobium etli RT1 in bacterial motility and biofilm formation
ABSTRACT Strain RT1 was isolated from root nodules of Lens culinaris (a lentil) and characterized as Rhizobium etli (a Gram-negative soil-borne bacterium) by 16S rDNA sequencing and phylogenetic analysis. The signaling molecules produced by R. etli (RT1) were detected and identified by high-performance liquid chromatography coupled with mass spectrometry. Th
Braz. J. Microbiol.. Publicado em: 2017-12
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7. Reviewing Microbial Behaviors in Ecosystems Leading to a Natural Quorum Quenching Occurrence
ABSTRACT Quorum sensing is considered one of the most important discoveries in cell-to-cell communication. Although revealed in Bacteria, it has been identified as well as a mechanism present in the other two domains, Eukaryota and Archaea. This phenomenon consists mainly of an exchange and sensing of "words" produced by each cell: chemical signals known as
Braz. arch. biol. technol.. Publicado em: 22/06/2017
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8. Microbial interactions: ecology in a molecular perspective
ABSTRACT The microorganism-microorganism or microorganism-host interactions are the key strategy to colonize and establish in a variety of different environments. These interactions involve all ecological aspects, including physiochemical changes, metabolite exchange, metabolite conversion, signaling, chemotaxis and genetic exchange resulting in genotype sel
Braz. J. Microbiol.. Publicado em: 2016-12
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9. Anti-quorum sensing activity of phenolic extract from Eugenia brasiliensis (Brazilian cherry)
Abstract The aim of this study was to assess the anti-quorum sensing activity of phenolic extracts from grumixama (Eugenia brasiliensis), also known as Brazilian cherry, in concentrations that did not interfere with bacterial growth. The pulp phenolic compounds were extracted by using solid phage extraction in a mini-collumn C18 and quantified by spectrophot
Food Sci. Technol. Publicado em: 29/04/2016
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10. Phytogeographic patterns of the Atlantic Forest in the Rio Doce River Basin, the dart versus arrow debate, and quorum sensing in bacteria
An. Acad. Bras. Ciênc.. Publicado em: 2015-12
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11. Indutores e autoindutores na motilidade, no crescimento e na expressão gênica de Salmonella enterica serovar Typhimurium
Salmonella está entre os principais micro-organismos patogênicos veiculados por alimentos. A patogenicidade dessa bactéria está relacionada a uma série de fatores de virulência e, dentre estes, podemos citar os flagelos. A expressão do flagelo está entre os fatores de virulência modulados por Quorum Sensing. A adrenalina produzida pelos mamíferos u
Cienc. Rural. Publicado em: 18/08/2015
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12. A structural perspective on the mechanisms of quorum sensing activation in bacteria
Bactérias são capazes de sincronizar seu comportamento populacional a fim de regular a expressão gênica por meio de um mecanismo de comunicação célula-a-célula denominado quorum sensing. Este fenômeno envolve a produção, detecção e resposta a moléculas sinalizadoras extracelulares chamadas de auto-indutores, que direta ou indiretamente regulam
An. Acad. Bras. Ciênc.. Publicado em: 04/08/2015