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Thangaraj M, Lialin K, Dandela R, Adepu R, David S, Mizrachi MS, Meijler MM. Four component Ugi reaction based small-molecule probes for integrated phenotypic screening. Bioorg Chem 2024; 146:107257. [PMID: 38493639 DOI: 10.1016/j.bioorg.2024.107257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/19/2024]
Abstract
Quorum-sensing (QS) is a cell density-dependent signaling pathway regulated by gene expression for intra- and interspecies communication. We have targeted QS activity in Pseudomonas aeruginosa, an opportunistic human pathogen that causes disease in immunocompromised patients, with a set of probes containing a variety of functional groups, including photoreactive (diazirine) and affinity (alkyne) moieties, that were synthesized using a four-component Ugi reaction (Ugi-4CR).
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Affiliation(s)
- Manikandan Thangaraj
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel
| | - Ksenia Lialin
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel
| | - Rambabu Dandela
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel; Current Adress: Department of Industrial & Engineering Chemistry, Institute of Chemical Technology - Indian Oil Odisha Campus, India
| | - Raju Adepu
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel; Current Adress: Department of Natural Products & Medicinal Chemistry CSIR, Indian Institute of Chemical Technology (IICT), Hyderabad, India
| | - Shimrit David
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel
| | - Meital Shema Mizrachi
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel
| | - Michael M Meijler
- Department of Chemistry and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev Be'er Sheva, Israel.
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Ma H, Ma S, Luo W, Ding L, Wang J, Ren H. Long-term exogenous addition of synthetic acyl homoserine lactone enhanced the anaerobic granulation process. Sci Total Environ 2019; 696:133809. [PMID: 31470321 DOI: 10.1016/j.scitotenv.2019.133809] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/05/2019] [Accepted: 08/05/2019] [Indexed: 06/10/2023]
Abstract
Although adding long-term acyl homoserine lactone (AHL) over one month was highly instructive for the development of an AHL-based anaerobic granulation strategy, the role of long-term exogenous AHL at different concentrations in the granulation process was poorly understood due to commercial exogenous AHL's extremely high cost. In this study, organic synthesis of N-decanoyl-homoserine lactone (C10-HSL) was employed for the first time to drastically reduce the cost of the AHL addition. Daily dosages of exogenous C10-HSL at 50 nM, 500 nM and 5000 nM were separately added into anaerobic bioreactors to promote the granulation process for as long as 168 days. 50 nM C10-HSL showed a negligible effect on the granulation process while 5000 nM C10-HSL achieved the best performance with the highest chemical oxygen demand (COD) removal, largest granule size and best extracellular polymeric substance production. Bacterial analysis indicated that exogenous C10-HSL showed a concentration-related effect in bacterial community organization. Besides, addition of 5000 nM C10-HSL resulted in the greatest promotion of Methanosaeta which was extremely important to the formation of anaerobic granule. This study provides a foundation for the future application of long-term exogenous AHL manipulation to improve the granulation process in an engineered ecosystem.
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Affiliation(s)
- Haijun Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Sijia Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Wenqi Luo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Lili Ding
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Jinfeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.
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Abstract
The common language of bacteria and higher life forms is a lexicon of small molecules that the research community is only beginning to decipher. While many new signaling molecules have been discovered in recent years, the identification of their targets is mostly lagging. This review will focus on the latest chemical-probe based research aimed at understanding how bacteria interact chemically with mammals and plants. In general, chemical biology strategies remain under-utilized in this complex field of research, with a few key exceptions, and we hope that this review encourages others to implement these techniques in their research. Specifically, we highlight the chemical biology techniques used in recent studies, especially activity-based protein profiling, that have been applied to unravel the chemical mechanisms of interkingdom interactions.
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Affiliation(s)
- R Gregor
- Department of Chemistry and National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, 84105, Israel.
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Holm A, Vikström E. Quorum sensing communication between bacteria and human cells: signals, targets, and functions. Front Plant Sci 2014; 5:309. [PMID: 25018766 PMCID: PMC4071818 DOI: 10.3389/fpls.2014.00309] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 06/10/2014] [Indexed: 05/10/2023]
Abstract
Both direct and long-range interactions between pathogenic Pseudomonas aeruginosa bacteria and their eukaryotic hosts are important in the outcome of infections. For cell-to-cell communication, these bacteria employ the quorum sensing (QS) system to pass on information of the density of the bacterial population and collectively switch on virulence factor production, biofilm formation, and resistance development. Thus, QS allows bacteria to behave as a community to perform tasks which would be impossible for individual cells, e.g., to overcome defense and immune systems and establish infections in higher organisms. This review highlights these aspects of QS and our own recent research on how P. aeruginosa communicates with human cells using the small QS signal molecules N-acyl homoserine lactones (AHL). We focus on how this conversation changes the behavior and function of neutrophils, macrophages, and epithelial cells and on how the signaling machinery in human cells responsible for the recognition of AHL. Understanding the bacteria-host relationships at both cellular and molecular levels is essential for the identification of new targets and for the development of novel strategies to fight bacterial infections in the future.
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Affiliation(s)
| | - Elena Vikström
- *Correspondence: Elena Vikström, Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping SE-58185, Sweden e-mail:
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Baker YR, Galloway WR, Hodgkinson JT, Spring DR. Design and synthesis of a biotinylated chemical probe for detecting the molecular targets of an inhibitor of the production of the Pseudomonas aeruginosa virulence factor pyocyanin. Molecules 2013; 18:11783-96. [PMID: 24071985 DOI: 10.3390/molecules181011783] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 09/09/2013] [Accepted: 09/17/2013] [Indexed: 12/19/2022] Open
Abstract
Pseudomonas aeruginosa is a human pathogen associated with a variety of life-threatening nosocomial infections. This organism produces a range of virulence factors which actively cause damage to host tissues. One such virulence factor is pyocyanin, known to play a crucial role in the pathogenesis of P. aeruginosa infections. Previous studies had identified a novel compound capable of strongly inhibiting the production of pyocyanin. It was postulated that this inhibition results from modulation of an intercellular communication system termed quorum sensing, via direct binding of the compound with the LasR protein receptor. This raised the possibility that the compound could be an antagonist of quorum sensing in P. aeruginosa, which could have important implications as this intercellular signaling mechanism is known to regulate many additional facets of P. aeruginosa pathogenicity. However, there was no direct evidence for the binding of the active compound to LasR (or any other targets). Herein we describe the design and synthesis of a biotin-tagged version of the active compound. This could potentially be used as an affinity-based chemical probe to ascertain, in a direct fashion, the active compound’s macromolecular biological targets, and thus better delineate the mechanism by which it reduces the level of pyocyanin production.
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Dubinsky L, Delago A, Amara N, Krief P, Rayo J, Zor T, Kravchenko VV, Meijler MM. Species selective diazirine positioning in tag-free photoactive quorum sensing probes. Chem Commun (Camb) 2013; 49:5826-8. [PMID: 23702727 PMCID: PMC3723129 DOI: 10.1039/c3cc43092h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The synthesis and comparison of activities of 'tag-free' probes with diazirines at various positions are described. Remarkable differences in their effects on P. aeruginosa and on human bronchial epithelial cells were observed, supporting the efforts to isolate and identify receptors for N-acyl homoserine lactones.
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Affiliation(s)
- Luba Dubinsky
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be’er-Sheva 84105, Israel
| | - Antonia Delago
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be’er-Sheva 84105, Israel
| | - Neri Amara
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be’er-Sheva 84105, Israel
| | - Pnina Krief
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be’er-Sheva 84105, Israel
| | - Josep Rayo
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be’er-Sheva 84105, Israel
| | - Tsaffrir Zor
- Department of Biochemistry and Molecular Biology, Life Sciences Institute, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Vladimir V. Kravchenko
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, 10550 N Torrey Pines Road, La Jolla, CA 92037, USA
| | - Michael M. Meijler
- Department of Chemistry and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be’er-Sheva 84105, Israel
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Ren JL, Zhang E, Ye XW, Wang MM, Yu B, Wang WH, Guo YZ, Liu HM. Design, synthesis and antibacterial evaluation of novel AHL analogues. Bioorg Med Chem Lett 2013; 23:4154-6. [DOI: 10.1016/j.bmcl.2013.05.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 05/08/2013] [Accepted: 05/10/2013] [Indexed: 12/15/2022]
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Karlsson T, Turkina MV, Yakymenko O, Magnusson KE, Vikström E. The Pseudomonas aeruginosa N-acylhomoserine lactone quorum sensing molecules target IQGAP1 and modulate epithelial cell migration. PLoS Pathog 2012; 8:e1002953. [PMID: 23071436 PMCID: PMC3469656 DOI: 10.1371/journal.ppat.1002953] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Accepted: 08/23/2012] [Indexed: 01/01/2023] Open
Abstract
Quorum sensing (QS) signaling allows bacteria to control gene expression once a critical population density is achieved. The Gram-negative human pathogen Pseudomonas aeruginosa uses N-acylhomoserine lactones (AHL) as QS signals, which coordinate the production of virulence factors and biofilms. These bacterial signals can also modulate human cell behavior. Little is known about the mechanisms of the action of AHL on their eukaryotic targets. Here, we found that N-3-oxo-dodecanoyl-L-homoserine lactone 3O-C12-HSL modulates human intestinal epithelial Caco-2 cell migration in a dose- and time-dependent manner. Using new 3O-C12-HSL biotin and fluorescently-tagged probes for LC-MS/MS and confocal imaging, respectively, we demonstrated for the first time that 3O-C12-HSL interacts and co-localizes with the IQ-motif-containing GTPase-activating protein IQGAP1 in Caco-2 cells. The interaction between IQGAP1 and 3O-C12-HSL was further confirmed by pull-down assay using a GST-tagged protein with subsequent Western blot of IQGAP1 and by identifying 3O-C12-HSL with a sensor bioassay. Moreover, 3O-C12-HSL induced changes in the phosphorylation status of Rac1 and Cdc42 and the localization of IQGAP1 as evidenced by confocal and STED microscopy and Western blots. Our findings suggest that the IQGAP1 is a novel partner for P.aeruginosa 3O-C12-HSL and likely the integrator of Rac1 and Cdc42- dependent altered cell migration. We propose that the targeting of IQGAP1 by 3O-C12-HSL can trigger essential changes in the cytoskeleton network and be an essential component in bacterial – human cell communication. The human pathogen Pseudomonas aeruginosa and other bacteria communicate with each other using quorum sensing (QS). This is important for their growth, virulence, motility and the formation of biofilms. Furthermore, eukaryotic cells “listen and respond” to QS signaling, but the exact mechanisms and receptors on mammalian cells have not been identified. We have previously shown that N-acylhomoserine lactones (AHL) alter epithelial barrier functions and increase chemotaxis in human neutrophils. We show here that 3O-C12-HSL modulates the migration of epithelial cells in a dose- and time-dependent manner. Using newly designed and validated biotin- and fluorescein-based 3O-C12-HSL probes we identified the IQ-motif-containing GTPase-activating protein IQGAP1 as a human target of 3O-C12-HSL. We propose that the interaction between IQGAP1 and 3O-C12-HSL provides a novel mechanism for its mode of action on eukaryotic cells, and by affecting the distribution of IQGAP1 and phosphorylation of Rac1 and Cdc42, upstream effectors of filamentous actin remodeling, also cell migration. We suggest that recognition of IQGAP1 by 3O-C12-HSL is a very early event in the communication between bacteria and human epithelial cells.
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Affiliation(s)
- Thommie Karlsson
- Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Maria V. Turkina
- Division of Cell Biology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Olena Yakymenko
- Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Karl-Eric Magnusson
- Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - Elena Vikström
- Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
- * E-mail:
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9
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Abstract
Bacteria frequently manifest distinct phenotypes as a function of cell density in a phenomenon known as quorum sensing (QS). This intercellular signalling process is mediated by "chemical languages" comprised of low-molecular weight signals, known as autoinducers, and their cognate receptor proteins. As many of the phenotypes regulated by QS can have a significant impact on the success of pathogenic or mutualistic prokaryotic-eukaryotic interactions, there is considerable interest in methods to probe and modulate QS pathways with temporal and spatial control. Such methods would be valuable for both basic research in bacterial ecology and in practical medicinal, agricultural, and industrial applications. Toward this goal, considerable recent research has been focused on the development of chemical approaches to study bacterial QS pathways. In this Perspective, we provide an overview of the use of chemical probes and techniques in QS research. Specifically, we focus on: (1) combinatorial approaches for the discovery of small molecule QS modulators, (2) affinity chromatography for the isolation of QS receptors, (3) reactive and fluorescent probes for QS receptors, (4) antibodies as quorum "quenchers," (5) abiotic polymeric "sinks" and "pools" for QS signals, and (6) the electrochemical sensing of QS signals. The application of such chemical methods can offer unique advantages for both elucidating and manipulating QS pathways in culture and under native conditions.
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Affiliation(s)
| | | | - Helen E. Blackwell
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, WI 53706, USA. Fax: +1 (608) 265-4534; Tel: +1 (608) 262-1503
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