Bacterial biofilms are serious concern in patients infected with urinary tract infections, complicated urinary tract infections and other device-associated infections. Microbes within the biofilms are effectively shielded from antibiotics and host immune cells, hence can be treated only with agents which has the potential to disassemble the biofilms. The study is focused on the root extracts of Arctium lappa Linn. as a source for complementary medicine against three major biofilm forming clinical isolates of Escherichia coli, Proteus mirabilis, and Serratia marcescens. Methanol extracts of burdock roots (BR) showed no bactericidal activity (p > 0.05) against the uropathogens, whereas restrained the biofilms (p < 0.05) on polystyrene and glass surfaces at a biofilm inhibitory concentration of 100 µg/mL. The 3D confocal laser scanning microscopy was used to analyze the biofilm architecture which showed significant reduction in the surface area. Z-stack analysis has also revealed substantial reduction in the biofilm thickness (E. coli–50.79 %, P. mirabilis–69.49 %, and S. marcescens–75.84 %). Further, BR extracts also inhibited quorum-sensing (QS)-controlled cellular phenotypes such as violacein, prodigiosin, swarming motility, and cell surface hydrophobicity. LC–MS/MS analysis of BR extracts identified the presence of two major quercetin derivatives (miquelianin and peltatoside) along with few other constituent components. Exploring such phytocompounds will provide potential agents to treat infections caused by biofilm forming uropathogens. The antibiofilm and anti-QS agents will ultimately serve as armor, facilitating the host immune system to fight infections.
Antibiofilm Uropathogens Quorum quenching Z-stack analysis LC–MS/MS
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The authors acknowledge Mrs. Ann Susan Edison and Dr. Enok Sylvius Sundaram for providing the burdock root materials. Authors also acknowledge Mr. Venkateswarlu Dasari, Sanghamitra Hospital, Ongole for providing the clinical isolates. Financial support rendered to SKR by DRDO, GoI (ERIP/ER/1103948/M/01/1377) in the form of Junior Research Fellowship has been thankfully acknowledged.
Conflict of interest
The authors declare that they have no conflict of interest.
Stickler DJ (1996) Bacterial biofilms and the encrustation of urethral catheters. Biofouling 94:293–305CrossRefGoogle Scholar
Jacobsen SM, Shirtliff ME (2011) Proteus mirabilis biofilms and catheter-associated urinary tract infections. Virulence 2(5):460–465PubMedCrossRefGoogle Scholar
Gottenbos B, van der Mei HC, Busscher HJ (1999) Models for studying initial adhesion and surface growth in biofilm formation on surfaces. Methods Enzymol 310:523–534PubMedCrossRefGoogle Scholar
Shah AA, Hasan F, Ahmed S et al (2004) Extended-spectrum beta-lactamases (ESbLs): characterization, epidemiology and detection. Crit Rev Microbiol 30:25–32PubMedCrossRefGoogle Scholar
Bakkiyaraj D, Pandian SK (2010) In vitro and in vivo antibiofilm activity of a coral associated actinomycete against drug resistant Staphylococcus aureus biofilms. Biofouling 26:711–717PubMedCrossRefGoogle Scholar
Rajasekharan SK, Ramesh S (2013) Cellulase Inhibits Burkholderia cepacia Biofilms on Diverse Prosthetic Materials. Pol J Microbiol 62(3):327–330PubMedGoogle Scholar
Slater H, Crow M, Everson L, Salmond GP (2003) Phosphate availability regulates biosynthesis of two antibiotics, prodigiosin and carbapenem in Serratia via both quorum-sensing-dependent and -independent pathways. Mol Microbiol 47:303–320PubMedCrossRefGoogle Scholar
Matsuyama T, Kaneda K, Nakagawa Y et al (1992) A novel extracellular cyclic lipopeptide which promotes flagellum-dependent and -independent spreading growth of Serratia marcescens. J Bacteriol 174:1769–1776PubMedCentralPubMedGoogle Scholar
Park KM, Ypu JS, Lee HY et al (2003) An antibacterial agent from the root barks of Morus alba against oral pathogens. J Etahnopharmocol 84:181–185CrossRefGoogle Scholar
Khodavandi A, Harmal NS, Alizadeh F et al (2001) Riddle of biofilm resistance. Antimicrob Agents Chemother 45:999–1007CrossRefGoogle Scholar
Vikram A, Jayaprakasha GK, Jesudhasan PR et al (2010) Suppression of bacterial cell-cell signalling, biofilm formation and type III secretion system by citrus flavonoids. J Appl Microbiol 109(2):515–527PubMedGoogle Scholar
Lee KM, Lim J, Nam S et al (2011) Inhibitory effects of broccoli extract on Escherichia coli O157:H7 quorum sensing and in vivo virulence. FEMS Microbiol Lett 321(1):67–74PubMedCrossRefGoogle Scholar
Lee JH, Park JH, Cho HS et al (2013) Anti-biofilm activities of quercetin and tannic acid against Staphylococcus aureus. Biofouling 29(5):491–499PubMedCrossRefGoogle Scholar