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Article Publish Status: FREE
Abstract Title:

Anti-quorum sensing effects of licochalcone A and epigallocatechin-3-gallate againstTyphimurium isolates from poultry sources.

Abstract Source:

Vet Res Forum. 2020 ;11(3):273-279. Epub 2020 Sep 15. PMID: 33133465

Abstract Author(s):

Somayyeh Hosseinzadeh, Habib Dastmalchi Saei, Malahat Ahmadi, Taghi Zahraei-Salehi

Article Affiliation:

Somayyeh Hosseinzadeh

Abstract:

Quorum sensing (QS) is a cell density-dependent mechanism used by many pathogenic bacteria for regulating virulence gene expression. Inhibition or interruption of QS by medicinal plant remedies has been suggested as a new strategy for fighting against antibiotic-resistant bacteria. This study aimed to assess the impact of sub-inhibitory concentrations of licochalcone A (LAA) and epigallocatechin-3-gallate (EGCG) as natural plant products on the QSassociated genes (and) expression. The PCR test was used to confirm the presence ofandgenes in 23. Typhimurium isolates from poultry. The quantitative real-time PCR assay was used to analyze the expression ofandin. Typhimurium isolates in response to the treatment with sub-inhibitory concentrations of LAA and EGCG at 45-min time point. All. Typhimurium isolates showed the presence ofandgenes (100%). As result, the expression of QS-related genes was significantly reduced inTyphimurium isolates following treatment with LAA and EGCG. In conclusion, LAA and EGCG showed anti-QS activity with down-regulation of bothandgenes inTyphimurium, suggesting potential therapeutic use of them against salmonellosis. However, it must be pointed out that the safety and efficiency of these compounds need more thorough research.

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