A High-Throughput Screening Platform of Microbial Natural Products for the Discovery of Molecules with Antibiofilm Properties against Salmonella

被引:26
作者
Paytubi, Sonia [1 ]
de La Cruz, Mercedes [2 ]
Tormo, Jose R. [2 ]
Martin, Jesus [2 ]
Gonzalez, Ignacio [2 ]
Gonzalez-Menendez, Victor [2 ]
Genilloud, Olga [2 ]
Reyes, Fernando [2 ]
Vicente, Francisca [2 ]
Madrid, Cristina [1 ]
Balsalobre, Carlos [1 ]
机构
[1] Univ Barcelona, Fac Biol, Dept Genet Microbiol & Estadist, Barcelona, Spain
[2] Fdn MEDINA, Parque Tecnol Ciencias Salud, Granada, Spain
关键词
biofilm; Salmonella; HTS; natural products; patulin; antimicrobial; STAPHYLOCOCCUS-AUREUS BIOFILMS; ESCHERICHIA-COLI; DRUG DISCOVERY; IN-VITRO; BACTERIAL BIOFILMS; RESAZURIN; PATULIN; ASSAY; QUANTIFICATION; DISINFECTANTS;
D O I
10.3389/fmicb.2017.00326
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
In this report, we describe a High-Throughput Screening (HTS) to identify compounds that inhibit biofilm formation or cause the disintegration of an already formed biofilm using the Salmonella Enteritidis 3934 strain. Initially, we developed a new methodology for growing Salmonella biofilms suitable for HTS platforms. The biomass associated with biofilm at the solid-liquid interface was quantified by staining both with resazurin and crystal violet, to detect living cells and total biofilm mass, respectively. For a pilot project, a subset of 1120 extracts from the Fundacion MEDINA's collection was examined to identify molecules with antibiofilm activity. This is the first validated HTS assay of microbial natural product extracts which allows for the detection of four types of activities which are not mutually exclusive: inhibition of biofilm formation, detachment of the preformed biofilm and antimicrobial activity against planktonic cells or biofilm embedded cells. Currently, several extracts have been selected for further fractionation and purification of the active compounds. In one of the natural extracts patulin has been identified as a potent molecule with antimicrobial activity against both, planktonic cells and cells within the biofilm. These findings provide a proof of concept that the developed HTS can lead to the discovery of new natural compounds with antibiofilm activity against Salmonella and its possible use as an alternative to antimicrobial therapies and traditional disinfectants.
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页数:13
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