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Wu K, Zhang T, Chai X, Wang P, Duan X, He D, Zou D. Study on the formation and anti-biofilm properties of cinnamon essential oil inclusion complexes by the structure of modified β-cyclodextrins. Microb Pathog 2023; 184:106361. [PMID: 37743027 DOI: 10.1016/j.micpath.2023.106361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/10/2023] [Accepted: 09/15/2023] [Indexed: 09/26/2023]
Abstract
Essential oils (EOs), which are plant-oriented anti-biofilm agents, are extensively encapsulated by cyclodextrins to overcome their aqueous solubility and chemical instability, and achieve slow release during long-term storage. However, the biological activities of EOs decreased after initial encapsulation in CDs. In this study, modified-β-cyclodextrins (β-CDs) were screened as wall materials to maintained the initial anti-biofilm effect of pure CEO. The inhibitory and bactericidal activities of CEO encapsulated in five types of β-CDs with different substituents (primary hydroxyl, maltosyl, hydroxypropyl, methyl, and carboxymethyl) against Staphylococcus aureus biofilm were evaluated. Crystal violet assay and 3D-View observations suggested that CEO and its inclusion complexes (CEO-ICs) inhibited Staphylococcus aureus biofilm formation through the inhibition of colonising spreading, exopolysaccharide synthesis, and cell surface properties. Molecular docking revealed the causes of the decrease in the anti-biofilm effect after encapsulation, and quantitative structure-activity relationship assays provided MIC and MBIC prediction equation for modified-β-cyclodextrins inclusion complexes. Maltosyl-β-CD was screened as the best wall material to retained the anti-biofilm activities as pure cinnamon essential oil in initial stage, and its inclusion complexes can effectively inhibited biofilm formation in milk. This study provides a theoretical guidance for the selection β-CDs to encapsulate CEO as plant-oriented anti-biofilm agents to inhibit bacterial biofilm formation.
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Affiliation(s)
- Kegang Wu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China
| | - Tong Zhang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China.
| | - Xianghua Chai
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China
| | - Pingping Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China
| | - Xuejuan Duan
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China
| | - Dong He
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China
| | - Dongxin Zou
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 511443, China
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2
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Zamora R, McEvoy J, Colbert C, Chacana Olivares J, Kaewlom P, Khan E. Blocking bacterial appendage attachment to wastewater treatment membranes using anti-adhesins. CHEMOSPHERE 2023; 323:138246. [PMID: 36842556 PMCID: PMC10083094 DOI: 10.1016/j.chemosphere.2023.138246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 01/30/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Membrane bioreactors (MBRs) suffer from high operational and cleaning costs due to biofouling. The biofouling begins when the adhesins (an anchor-type epitope made up of polar and charged amino acids) on microbial appendages bind to the surface. Two different compounds-dodecyl-β-D-maltoside (DDM) and methyl α-d-mannopyranoside (MeαMan)-were investigated as possible biofilm mitigation tools due to their documented anti-adhesin properties in the biomedical field. DDM prevented up to 56.3, 87.0, and 67.6% of the formation of Pseudomonas putida, Escherichia coli and wastewater culture biofilms, respectively, in microplate experiments. MeαMan increased biofilm in the microplates. In a biofilm reactor setting, DDM was then applied on typical membrane materials, polyvinylidene fluoride, polyamide, polyether-sulfone, and polyacrylonitrile and prevented 79.4, 62.5, 81.3, and 68.2% of the detectable wastewater culture biofilm formation, respectively. The mechanism of anti-adhesion was the binding of the polar head of the DDM to the polar amino acids of the microbial appendages in conjunction with the orientation of the DDM as it binds different membrane materials. If the anti-adhesins are effective at increasing the distance of the bacteria from the membrane materials, they will serve as a new method for delaying biofouling.
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Affiliation(s)
- Ricardo Zamora
- Department of Civil and Environmental Engineering, North Dakota State University, Fargo, ND, 58108, USA
| | - John McEvoy
- Department of Microbiological Sciences, North Dakota State University, Fargo, ND, 58108, USA
| | - Christopher Colbert
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND, 58108, USA
| | | | - Puangrat Kaewlom
- Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Eakalak Khan
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, 89154, USA.
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3
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Patil PD, Jin Y, Luk YY. Chemical control over Asialo-GM1: A dual ligand for pili and Lectin A that activates swarming motility and facilitates adherence of Pseudomonas aeruginosa. Colloids Surf B Biointerfaces 2022; 215:112478. [PMID: 35390596 DOI: 10.1016/j.colsurfb.2022.112478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/14/2022] [Accepted: 03/21/2022] [Indexed: 11/20/2022]
Abstract
Glycolipid, ganglio-N-tetraosylceramide (asialo-GM1), on the mammalian cells are known to be recognized by type IV pili of Pseudomonas aeruginosa. In this work, we show that asialo-GM1 can also be recognized by Lectin A (LecA), another adhesin protein of the P. aeruginosa, by a fluorescent polarization assay, a label-free bacterial motility enabled binding assay, and bacterial mutant studies. On hydrated semi-solid gel surfaces, asialo-GM1 enables swarming and twitching motilities, while on solid surfaces facilitates the bacterial adherence of P. aeruginosa. These results indicate that asialo-GM1 can modulate bioactivities, adherence, and motilities, that are controlled by opposite signaling pathways. We demonstrate that when a solution of pilin monomers or LecA proteins are spread on hydrated gel surfaces, the asialo-GM1 mediated swarming motility is inhibited. Treatment of artificial liposomes containing asialo-GM1 as a component of lipid bilayer with pilin monomers or LecA proteins caused transient leakage of encapsulated dye from liposomes. These results suggest that pili and LecA proteins not only bind to asialo-GM1 but can also cause asialo-GM1 mediated leakage. We also show that both pili and LecA mutants of P. aeruginosa adhere to asialo-GM1 coated solid surfaces, and that a class of synthetic ligands for pili and LecA inhibits both pili and LecA-mediated adherence of P. aeruginosa on asialo-GM1-coated surfaces.
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Affiliation(s)
- Pankaj D Patil
- Department of Chemistry, Syracuse University 1-014 Center of Science and Technology, Syracuse, NY 13244, USA
| | - Yuchen Jin
- Department of Chemistry, Syracuse University 1-014 Center of Science and Technology, Syracuse, NY 13244, USA
| | - Yan-Yeung Luk
- Department of Chemistry, Syracuse University 1-014 Center of Science and Technology, Syracuse, NY 13244, USA.
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4
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Patil PD, Zheng H, Burns FN, Ibanez ACS, Jin Y, Luk YY. Chimeric Ligands of Pili and Lectin A Inhibit Tolerance, Persistence, and Virulence Factors of Pseudomonas aeruginosa over a Wide Range of Phenotypes. ACS Infect Dis 2022; 8:1582-1593. [PMID: 35658414 PMCID: PMC9379910 DOI: 10.1021/acsinfecdis.2c00201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
![]()
Bacteria readily
form resilient phenotypes to counter environmental
and antibiotic stresses. Here, we demonstrate a class of small molecules
that inhibit a wide range of Pseudomonas aeruginosa phenotypes and enable antibiotics to kill previously tolerant bacteria,
preventing the transition of tolerant bacteria into a persistent population.
We identified two proteins, type IV pili and lectin LecA, as receptors
for our molecules by methods including a new label-free assay based
on bacterial motility sensing the chemicals in the environment, the
chemical inhibition of bacteriophage adsorption on pili appendages
of bacteria, and fluorescence polarization. Structure–activity
relationship studies reveal a molecule that inhibits only pili appendage
and a class of chimeric ligands that inhibit both LecA and pili. Important
structural elements of the ligand are identified for each protein.
This selective ligand binding identifies the phenotypes each protein
receptor controls. Inhibiting LecA results in reducing biofilm formation,
eliminating small colony variants, and is correlated with killing
previously tolerant bacteria. Inhibiting pili appendages impedes swarming
and twitching motilities and pyocyanin and elastase production. Because
these phenotypes are controlled by a broad range of signaling pathways,
this approach simultaneously controls the multiple signaling mechanisms
preventing bacteria to elude antibiotic treatments.
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Affiliation(s)
- Pankaj D Patil
- Department of Chemistry, Syracuse University, 1-014 Center of Science and Technology, Syracuse, New York 13244-4100, United States
| | - Hewen Zheng
- Department of Chemistry, Syracuse University, 1-014 Center of Science and Technology, Syracuse, New York 13244-4100, United States
| | - Felicia N Burns
- Department of Chemistry, Syracuse University, 1-014 Center of Science and Technology, Syracuse, New York 13244-4100, United States
| | - Arizza C S Ibanez
- Department of Chemistry, Syracuse University, 1-014 Center of Science and Technology, Syracuse, New York 13244-4100, United States
| | - Yuchen Jin
- Department of Chemistry, Syracuse University, 1-014 Center of Science and Technology, Syracuse, New York 13244-4100, United States
| | - Yan-Yeung Luk
- Department of Chemistry, Syracuse University, 1-014 Center of Science and Technology, Syracuse, New York 13244-4100, United States
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5
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Burns FN, Alila MA, Zheng H, Patil PD, Ibanez ACS, Luk YY. Exploration of Ligand-receptor Binding and Mechanisms for Alginate Reduction and Phenotype Reversion by Mucoid Pseudomonas aeruginosa. ChemMedChem 2021; 16:1975-1985. [PMID: 33666373 DOI: 10.1002/cmdc.202100121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Indexed: 11/09/2022]
Abstract
Bacteria in general can develop a wide range of phenotypes under different conditions and external stresses. The phenotypes that reside in biofilms, overproduce exopolymers, and show increased motility often exhibit drug tolerance and drug persistence. In this work, we describe a class of small molecules that delay and inhibit the overproduction of alginate by a non-swarming mucoid Pseudomonas aeruginosa. Among these molecules, selected benzophenone-derived alkyl disaccharides cause the mucoid bacteria to swarm on hydrated soft agar gel and revert the mucoid to a nonmucoid phenotype. The sessile (biofilm) and motile (swarming) phenotypes are controlled by opposing signaling pathways with high and low intracellular levels of bis-(3',5')-cyclic diguanosine monophosphate (cdG), respectively. As our molecules control several of these phenotypes, we explored a protein receptor, pilin of the pili appendages, that is consistent with controlling these bioactivities and signaling pathways. To test this binding hypothesis, we developed a bacterial motility-enabled binding assay that uses the interfacial properties of hydrated gels and bacterial motility to conduct label-free ligand-receptor binding studies. The structure-activity correlation and receptor identification reveal a plausible mechanism for reverting mucoid to nonmucoid phenotypes by binding pili appendages with ligands capable of sequestering and neutralizing reactive oxygen species.
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Affiliation(s)
- Felicia N Burns
- Department of Chemistry, Syracuse University, 1-014 CST, 111 College Place, Syracuse, NY, 13244, USA
| | - Mercy A Alila
- Department of Chemistry, Syracuse University, 1-014 CST, 111 College Place, Syracuse, NY, 13244, USA
| | - Hewen Zheng
- Department of Chemistry, Syracuse University, 1-014 CST, 111 College Place, Syracuse, NY, 13244, USA
| | - Pankaj D Patil
- Department of Chemistry, Syracuse University, 1-014 CST, 111 College Place, Syracuse, NY, 13244, USA
| | - Arizza Chiara S Ibanez
- Department of Chemistry, Syracuse University, 1-014 CST, 111 College Place, Syracuse, NY, 13244, USA
| | - Yan-Yeung Luk
- Department of Chemistry, Syracuse University, 1-014 CST, 111 College Place, Syracuse, NY, 13244, USA
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6
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Mahapa A, Samanta GC, Maiti K, Chatterji D, Jayaraman N. Mannopyranoside Glycolipids Inhibit Mycobacterial and Biofilm Growth and Potentiate Isoniazid Inhibition Activities in M. smegmatis. Chembiochem 2019; 20:1966-1976. [PMID: 30951240 DOI: 10.1002/cbic.201900040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/04/2019] [Indexed: 12/17/2022]
Abstract
Lipomannan and lipoarabinomannan are integral components of the mycobacterial cell wall. Earlier studies demonstrated that synthetic arabinan and arabinomannan glycolipids acted as inhibitors of mycobacterial growth, in addition to exhibiting inhibitory activities of mycobacterial biofilm. Herein, it is demonstrated that synthetic mannan glycolipids are better inhibitors of mycobacterial growth, whereas lipoarabinomannan has a higher inhibition efficiency to biofilm. Syntheses of mannan glycolipids with a graded number of mannan moieties and an arabinomannan glycolipid are conducted by chemical methods and subsequent mycobacterial growth and biofilm inhibition studies are conducted on Mycobacterium smegmatis. Growth inhibition of (73±3) % is observed with a mannose trisaccharide containing a glycolipid, whereas this glycolipid did not promote biofilm inhibition activity better than that of arabinomannan glycolipid. The antibiotic supplementation activities of glycolipids on growth and biofilm inhibitions are evaluated. Increases in growth and biofilm inhibitions are observed if the antibiotic is supplemented with glycolipids, which leads to a significant reduction of inhibition concentrations of the antibiotic.
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Affiliation(s)
- Avisek Mahapa
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India
| | - Gopal Ch Samanta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560 012, India
| | - Krishnagopal Maiti
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560 012, India
| | - Dipankar Chatterji
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India
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7
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Day CJ, Hartley-Tassell LE, Seib KL, Tiralongo J, Bovin N, Savino S, Masignani V, Jennings MP. Lectin activity of Pseudomonas aeruginosa vaccine candidates PSE17-1, PSE41-5 and PSE54. Biochem Biophys Res Commun 2019; 513:287-290. [PMID: 30954224 DOI: 10.1016/j.bbrc.2019.03.092] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 03/16/2019] [Indexed: 12/26/2022]
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that causes nosocomial infections most commonly in immunocompromised, cystic fibrosis (CF) and burns patients. The pilin and Pseudomonas lectins 1 (PA-IL) and 2 (PA-IIL) are known glycan-binding proteins of P. aeruginosa that are involved in adherence to host cells, particularly CF host airways. Recently, new P. aeruginosa surface proteins were identified by reverse vaccinology and tested in vivo as potential vaccine antigens. Three of these, namely PSE17-1, PSE41-5 and PSE54, were screened for glycan binding using glycan arrays displaying glycan structures representative of those found on human cells. Surface plasmon resonance was used to confirm the lectin activity of these proteins, and determined affinities with several host glycans to be in the nanomolar range. PSE17-1 binds hyaluronic acid and sialyl Lewis A and X. PSE41-5 binds terminal β-linked galactose structures, Lewis and ABO blood group antigens. PSE54 binds to ABO blood group antigens and some terminal β-linked galactose. All three proteins are novel lectins of P. aeruginosa with potential roles in infection of host cells.
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Affiliation(s)
- Christopher J Day
- Institute for Glycomics, Griffith University, Gold Coast, QLD, 4222, Australia
| | | | - Kate L Seib
- Institute for Glycomics, Griffith University, Gold Coast, QLD, 4222, Australia
| | - Joe Tiralongo
- Institute for Glycomics, Griffith University, Gold Coast, QLD, 4222, Australia
| | - Nicolai Bovin
- Shemyakin Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | | | | | - Michael P Jennings
- Institute for Glycomics, Griffith University, Gold Coast, QLD, 4222, Australia.
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8
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Abstract
Glycosyl chlorides have historically been activated using harsh conditions and/or toxic stoichiometric promoters. More recently, the Ye and the Jacobsen groups showed that glycosyl chlorides can be activated under organocatalytic conditions. However, those reactions are slow, require specialized catalysts and high temperatures, but still provide only moderate yields. Presented herein is a simple method for the activation of glycosyl chlorides using abundant and inexpensive ferric chloride in catalytic amounts. Our preliminary results indicate that both benzylated and benzoylated glycosyl chlorides can be activated with 20 mol% of FeCl3.
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Affiliation(s)
- Scott A Geringer
- Department of Chemistry and Biochemistry, University of Missouri - St Louis, One University Boulevard, St Louis, Missouri 63121, USA.
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9
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Aleksic I, Petkovic M, Jovanovic M, Milivojevic D, Vasiljevic B, Nikodinovic-Runic J, Senerovic L. Anti-biofilm Properties of Bacterial Di-Rhamnolipids and Their Semi-Synthetic Amide Derivatives. Front Microbiol 2017; 8:2454. [PMID: 29276509 PMCID: PMC5727045 DOI: 10.3389/fmicb.2017.02454] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 11/27/2017] [Indexed: 12/23/2022] Open
Abstract
A new strain, namely Lysinibacillus sp. BV152.1 was isolated from the rhizosphere of ground ivy (Glechoma hederacea L.) producing metabolites with potent ability to inhibit biofilm formation of an important human pathogens Pseudomonas aeruginosa PAO1, Staphylococcus aureus, and Serratia marcescens. Structural characterization revealed di-rhamnolipids mixture containing rhamnose (Rha)-Rha-C10-C10, Rha-Rha-C8-C10, and Rha-Rha-C10-C12 in the ratio 7:2:1 as the active principle. Purified di-rhamnolipids, as well as commercially available di-rhamnolipids (Rha-Rha-C10-C10, 93%) were used as the substrate for the chemical derivatization for the first time, yielding three semi-synthetic amide derivatives, benzyl-, piperidine-, and morpholine. A comparative study of the anti-biofilm, antibacterial and cytotoxic properties revealed that di-Rha from Lysinibacillus sp. BV152.1 were more potent in biofilm inhibition, both cell adhesion and biofilm maturation, than commercial di-rhamnolipids inhibiting 50% of P. aeruginosa PAO1 biofilm formation at 50 μg mL-1 and 75 μg mL-1, respectively. None of the di-rhamnolipids exhibited antimicrobial properties at concentrations of up to 500 μg mL-1. Amide derivatization improved inhibition of biofilm formation and dispersion activities of di-rhamnolipids from both sources, with morpholine derivative being the most active causing more than 80% biofilm inhibition at concentrations 100 μg mL-1. Semi-synthetic amide derivatives showed increased antibacterial activity against S. aureus, and also showed higher cytotoxicity. Therefore, described di-rhamnolipids are potent anti-biofilm agents and the described approach can be seen as viable approach in reaching new rhamnolipid based derivatives with tailored biological properties.
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Affiliation(s)
- Ivana Aleksic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Milos Petkovic
- Department of Organic Chemistry, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Milos Jovanovic
- Department of Organic Chemistry, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Dusan Milivojevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Branka Vasiljevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | | | - Lidija Senerovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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10
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Maiti K, Syal K, Chatterji D, Jayaraman N. Synthetic Arabinomannan Heptasaccharide Glycolipids Inhibit Biofilm Growth and Augment Isoniazid Effects in Mycobacterium smegmatis. Chembiochem 2017; 18:1959-1970. [PMID: 28771901 DOI: 10.1002/cbic.201700247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Indexed: 02/04/2023]
Abstract
Biofilm formation, involving attachment to an adherent surface, is a critical survival strategy of mycobacterial colonies in hostile environmental conditions. Here we report the synthesis of heptasaccharide glycolipids based on mannopyranoside units anchored on to a branched arabinofuranoside core. Two types of glycolipids-2,3-branched and 2,5-branched-were synthesized and evaluated for their efficacies in inhibiting biofilm growth by the non-pathogenic mycobacterium variant Mycobacterium smegmatis. Biofilm formation was inhibited at a minimum biofilm growth inhibition concentration (MBIC) of 100 μg mL-1 in the case of the 2,5-branched heptasaccharide glycolipid. Further, we were able to ascertain that a combination of the drug isoniazid with the branched heptasaccharide glycolipid (50 μg mL-1 ) potentiates the drug, making it three times more effective, with an improved MBIC of 30 μg mL-1 . These studies establish that synthetic glycolipids not only act as inhibitors of biofilm growth, but also provide a synergistic effect when combined with significantly lowered concentrations of isoniazid to disrupt the biofilm structures of the mycobacteria.
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Affiliation(s)
- Krishnagopal Maiti
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560 012, India
| | - Kirtimaan Syal
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India
| | - Dipankar Chatterji
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India
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11
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Plakunov VK, Mart’yanov SV, Teteneva NA, Zhurina MV. Controlling of microbial biofilms formation: Anti- and probiofilm agents. Microbiology (Reading) 2017. [DOI: 10.1134/s0026261717040129] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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12
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Zheng H, Singh N, Shetye GS, Jin Y, Li D, Luk YY. Synthetic analogs of rhamnolipids modulate structured biofilms formed by rhamnolipid-nonproducing mutant of Pseudomonas aeruginosa. Bioorg Med Chem 2017; 25:1830-1838. [PMID: 28236509 DOI: 10.1016/j.bmc.2017.01.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/19/2017] [Accepted: 01/25/2017] [Indexed: 12/01/2022]
Abstract
Rhamnolipids secreted by Pseudomonas aeruginosa are required for the bacteria to form biofilm efficiently and form biofilm with internal structures including pores and channels. In this work, we explore the effect of a class of synthetic analogs of rhamnolipids at controlling (promoting and inhibiting) the biofilm formation activities of a non-rhamnolipid-producing strain - rhlA - of P. aeruginosa. This class of rhamnolipid analogs is known to modulate the swarming motilities of wild-type PAO1 and rhlA mutant, but its effect on biofilm formation of rhlA mutant is unknown. We show that small structural details of these molecules are important for the bioactivities, but do not affect the general physical properties of the molecules. The bioactive synthetic analogs of rhamnolipids promote biofilm formation by rhlA mutant at low concentrations, but inhibit the biofilm formation at high concentrations. To explore the internal structures formed by the biofilms, we first demonstrate that wild-type biofilms are formed with substantial topography (hills and valleys) when the sample is under shaking conditions. Using this observation as a comparison, we found that synthetic analogs of rhamnolipids promoted structured (porous) biofilm of rhlA mutant, at intermediate concentrations between the low ones that promoted biofilm formation and the high ones that inhibited biofilm formation. This study suggests a potential chemical signaling approach to control multiple bacterial activities.
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Affiliation(s)
- Hewen Zheng
- Chemistry Department, Syracuse University, Syracuse, NY 13244-4100, United States
| | - Nischal Singh
- Chemistry Department, Syracuse University, Syracuse, NY 13244-4100, United States
| | - Gauri S Shetye
- Chemistry Department, Syracuse University, Syracuse, NY 13244-4100, United States
| | - Yucheng Jin
- Chemistry Department, Syracuse University, Syracuse, NY 13244-4100, United States
| | - Diana Li
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269-4017, United States
| | - Yan-Yeung Luk
- Chemistry Department, Syracuse University, Syracuse, NY 13244-4100, United States.
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13
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Legerme G, Yang E, Esquivel RN, Kiljunen S, Savilahti H, Pohlschroder M. Screening of a Haloferax volcanii Transposon Library Reveals Novel Motility and Adhesion Mutants. Life (Basel) 2016; 6:life6040041. [PMID: 27898036 PMCID: PMC5198076 DOI: 10.3390/life6040041] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 12/11/2022] Open
Abstract
Archaea, like bacteria, use type IV pili to facilitate surface adhesion. Moreover, archaeal flagella—structures required for motility—share a common ancestry with type IV pili. While the characterization of archaeal homologs of bacterial type IV pilus biosynthesis components has revealed important aspects of flagellum and pilus biosynthesis and the mechanisms regulating motility and adhesion in archaea, many questions remain. Therefore, we screened a Haloferax volcanii transposon insertion library for motility mutants using motility plates and adhesion mutants, using an adapted air–liquid interface assay. Here, we identify 20 genes, previously unknown to affect motility or adhesion. These genes include potential novel regulatory genes that will help to unravel the mechanisms underpinning these processes. Both screens also identified distinct insertions within the genomic region lying between two chemotaxis genes, suggesting that chemotaxis not only plays a role in archaeal motility, but also in adhesion. Studying these genes, as well as hypothetical genes hvo_2512 and hvo_2876—also critical for both motility and adhesion—will likely elucidate how these two systems interact. Furthermore, this study underscores the usefulness of the transposon library to screen other archaeal cellular processes for specific phenotypic defects.
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Affiliation(s)
- Georgio Legerme
- Department of Biology, University of Pennsylvania, Philadelphia 19104, PA, USA.
| | - Evan Yang
- Department of Biology, University of Pennsylvania, Philadelphia 19104, PA, USA.
| | - Rianne N Esquivel
- Department of Biology, University of Pennsylvania, Philadelphia 19104, PA, USA.
| | - Saija Kiljunen
- Division of Genetics and Physiology, Department of Biology, University of Turku, Turku 20500, Finland.
- Immunobiology Program, Research Programs Unit, University of Helsinki, Fi-00014, Helsinki, Finland.
| | - Harri Savilahti
- Division of Genetics and Physiology, Department of Biology, University of Turku, Turku 20500, Finland.
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14
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Hoque J, Konai MM, Sequeira SS, Samaddar S, Haldar J. Antibacterial and Antibiofilm Activity of Cationic Small Molecules with Spatial Positioning of Hydrophobicity: An in Vitro and in Vivo Evaluation. J Med Chem 2016; 59:10750-10762. [DOI: 10.1021/acs.jmedchem.6b01435] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jiaul Hoque
- Chemical Biology and Medicinal
Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
| | - Mohini M. Konai
- Chemical Biology and Medicinal
Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
| | - Shanola S. Sequeira
- Chemical Biology and Medicinal
Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
| | - Sandip Samaddar
- Chemical Biology and Medicinal
Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
| | - Jayanta Haldar
- Chemical Biology and Medicinal
Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru 560064, India
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Cheng G, Dai M, Ahmed S, Hao H, Wang X, Yuan Z. Antimicrobial Drugs in Fighting against Antimicrobial Resistance. Front Microbiol 2016; 7:470. [PMID: 27092125 PMCID: PMC4824775 DOI: 10.3389/fmicb.2016.00470] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/21/2016] [Indexed: 01/18/2023] Open
Abstract
The outbreak of antimicrobial resistance, together with the lack of newly developed antimicrobial drugs, represents an alarming signal for both human and animal healthcare worldwide. Selection of rational dosage regimens for traditional antimicrobial drugs based on pharmacokinetic/pharmacodynamic principles as well as development of novel antimicrobials targeting new bacterial targets or resistance mechanisms are key approaches in tackling AMR. In addition to the cellular level resistance (i.e., mutation and horizontal gene transfer of resistance determinants), the community level resistance (i.e., bilofilms and persisters) is also an issue causing antimicrobial therapy difficulties. Therefore, anti-resistance and antibiofilm strategies have currently become research hotspot to combat antimicrobial resistance. Although metallic nanoparticles can both kill bacteria and inhibit biofilm formation, the toxicity is still a big challenge for their clinical applications. In conclusion, rational use of the existing antimicrobials and combinational use of new strategies fighting against antimicrobial resistance are powerful warranties to preserve potent antimicrobial drugs for both humans and animals.
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Affiliation(s)
- Guyue Cheng
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Menghong Dai
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Saeed Ahmed
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural University Wuhan, China
| | - Haihong Hao
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Xu Wang
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University Wuhan, China
| | - Zonghui Yuan
- Ministry of Agriculture Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural UniversityWuhan, China; National Reference Laboratory of Veterinary Drug Residues (HZAU) and Ministry of Agriculture Key Laboratory for the Detection of Veterinary Drug Residues in Foods, Huazhong Agricultural UniversityWuhan, China
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16
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Singh N, Shetye GS, Zheng H, Sun J, Luk YY. Chemical Signals of Synthetic Disaccharide Derivatives Dominate Rhamnolipids at Controlling Multiple Bacterial Activities. Chembiochem 2015; 17:102-11. [DOI: 10.1002/cbic.201500396] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Indexed: 02/04/2023]
Affiliation(s)
- Nischal Singh
- Department of Chemistry; Syracuse University; 1-014 CST, 111 College Place Syracuse NY 13244 USA
| | - Gauri S. Shetye
- Department of Chemistry; Syracuse University; 1-014 CST, 111 College Place Syracuse NY 13244 USA
| | - Hewen Zheng
- Department of Chemistry; Syracuse University; 1-014 CST, 111 College Place Syracuse NY 13244 USA
| | - Jiayue Sun
- Department of Chemistry; Syracuse University; 1-014 CST, 111 College Place Syracuse NY 13244 USA
| | - Yan-Yeung Luk
- Department of Chemistry; Syracuse University; 1-014 CST, 111 College Place Syracuse NY 13244 USA
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17
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Beloin C, Renard S, Ghigo JM, Lebeaux D. Novel approaches to combat bacterial biofilms. Curr Opin Pharmacol 2014; 18:61-8. [PMID: 25254624 DOI: 10.1016/j.coph.2014.09.005] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 09/05/2014] [Indexed: 11/15/2022]
Abstract
Biofilms formed by pathogenic bacteria and fungi are associated with a wide range of diseases, from device-related infections (such as catheters or prosthetic joints) to chronic infections occurring on native tissues (such as lung infections in cystic fibrosis patients). Biofilms are therefore responsible for an important medical and economic burden. Currently used antibiotics have mostly been developed to target exponentially growing microorganisms and are poorly effective against biofilms. In particular, even high concentrations of bactericidal antibiotics are inactive against a subset of persistent biofilm bacteria, which can cause infection recurrence despite prolonged treatments. While the search for a magic bullet antibiotic effective against both planktonic and biofilm bacteria is still active, alternative preventive and curative approaches are currently being developed either limiting adhesion or biofilm formation or targeting biofilm tolerance by killing persister bacteria. Most of these approaches are adjunctive using new molecules in combination with antibiotics. This review presents promising approaches or strategies that could improve our ability to prevent or eradicate bacterial biofilms in medical settings.
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Affiliation(s)
- Christophe Beloin
- Institut Pasteur, Unité de Génétique des Biofilms, Département de Microbiologie, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | | | - Jean-Marc Ghigo
- Institut Pasteur, Unité de Génétique des Biofilms, Département de Microbiologie, 28 rue du Dr. Roux, 75724 Paris Cedex 15, France
| | - David Lebeaux
- Université Paris Descartes, Sorbonne Paris Cité, AP-HP, Hôpital Necker Enfants Malades, Centre d'Infectiologie Necker-Pasteur and Institut Imagine, Paris, France.
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