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Title of Journal: Arch Microbiol

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Abbravation: Archives of Microbiology

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Springer Berlin Heidelberg

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DOI

10.1016/j.acn.2006.08.009

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1432-072X

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Acyl homoserine lactonebased quorum sensing stimu

Authors: Felipe Alves de Almeida Natan de Jesus PimentelFilho Uelinton Manoel Pinto Hilário Cuquetto Mantovani Leandro Licursi de Oliveira Maria Cristina Dantas Vanetti
Publish Date: 2016/11/12
Volume: 199, Issue: 3, Pages: 475-486
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Abstract

Quorum sensing regulates a variety of phenotypes in bacteria including the production of virulence factors Salmonella spp have quorum sensing systems mediated by three autoinducers AI1 AI2 and AI3 The AI1mediated system is incomplete in that the bacterium relies on the synthesis of signaling molecules by other microorganisms This study aimed to evaluate the influence of the AI1 NdodecanoylDLhomoserine lactone C12HSL on the growth motility adhesion and biofilm formation of Salmonella enterica serovar Enteritidis PT4 578 on a polystyrene surface Experiments were conducted at 37 °C in anaerobic tryptone soy broth supplemented with C12HSL and/or a mixture of four synthetic furanones at the concentration of 50 nM each The planktonic growth adhesion swarming and twitching motility were not altered in the presence of C12HSL and/or furanones under anaerobic conditions However C12HSL induced biofilm formation after 36 h of cultivation as determined by quantification of biofilm formation by enumeration of adhered cells to polystyrene coupons and finally by imaging the presence of multilayered cells on an epifluorescence microscope When furanones were present in the medium an antagonistic effect against C12HSL on the biofilm development was observed The results demonstrate an induction of biofilm formation in Salmonella Enteritidis by AI1 under anaerobic conditions Considering that Salmonella does not produce AI1 but respond to it C12HSL synthesized by other bacterial species could trigger biofilm formation by this pathogen in conditions that are relevant for its pathogenesisFelipe Alves de Almeida was supported by a fellowship from Conselho Nacional de Desenvolvimento Científico e Tecnológico CNPq and this research has been supported by Fundação de Amparo à Pesquisa do Estado de Minas Gerais FAPEMIG Brazil and by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CAPES UMP acknowledges funding from CNPq for his research

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