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Yang C, Dong J, Sun C, Li W, Tian Y, Liu Z, Gao F, Ye X. Exposure to heat stress causes downregulation of immune response genes and weakens the disease resistance of Micropterus salmoides. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2022; 43:101011. [PMID: 35839613 DOI: 10.1016/j.cbd.2022.101011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
In order to understand the molecular mechanism of response to heat stress in largemouth bass (LMB) Micropterus salmoides, we performed transcriptome analysis of spleen tissue of LMB subjected to heat stress and challenged with A. veronii under heat stress. A total of 2162 DEGs were identified between the heat stressed (32 °C) and control groups (24 °C) after 7 d treatment. Gene Ontology (GO) annotation analysis revealed that these differentially expressed genes (DEGs) were mainly enriched on GO terms of biological regulation, membrane part, and binding. ELISA validation indicated that except major histocompatibility complex II (Mhc II), the protein levels of t-Sod, caspase 3 (Casp3), tumor necrosis factor-α (Tnf-α), and complement component 3 (C3) were consistent with RNA-seq results. In the experiment of A. veronii challenged under heat stress (32 °C), 2899 and 2663 DEGs were obtained from the heat stress-challenged group (H6 vs H0, H12 vs H0), while 1485 and 3501 DEGs from the control-challenged group (C6 vs C0, C12 vs C0). GO and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses showed that immune-related categories and pathways were significantly enriched, such as immune system process, immune response and positive regulation of immune response in GO enrichment analysis, and cytokine-cytokine receptor interaction, human cytomegalovirus infection in KEGG signaling pathways. The expressions of f11, c1q and c3 in complement and coagulation pathway, as well as that of proinflammatory genes tnf-α and il-8, were deeply inhibited. Real-time quantitative PCR validation for nine DEGs showed that most of them had consistent expression trends with RNA-seq results. Our results indicated that heat stress affects the immunity and metabolism of LMB. In particular, it aggravates the inhibitory effects of A. veronii on the complement and coagulation systems while downregulating proinflammatory cytokine expression, thereby weakening the resistance of LMB to pathogen infection. Our results contribute to the elucidation of A. veronii infection pathogenic mechanisms in LMB under heat stress.
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Affiliation(s)
- Chao Yang
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China
| | - Junjian Dong
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Chengfei Sun
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Wuhui Li
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Yuanyuan Tian
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Zhigang Liu
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Fengying Gao
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China
| | - Xing Ye
- Key Laboratory of Tropical and Subtropical Fisheries Resource Application and Cultivation, Ministry of Agriculture and Rural Affairs, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China; Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China.
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Ruiz CH, Osorio-Llanes E, Trespalacios MH, Mendoza-Torres E, Rosales W, Gómez CMM. Quorum Sensing Regulation as a Target for Antimicrobial Therapy. Mini Rev Med Chem 2021; 22:848-864. [PMID: 34856897 DOI: 10.2174/1389557521666211202115259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 05/20/2021] [Accepted: 09/04/2021] [Indexed: 11/22/2022]
Abstract
Some bacterial species use a cell-to-cell communication mechanism called Quorum Sensing (QS). Bacteria release small diffusible molecules, usually termed signals which allow the activation of beneficial phenotypes that guarantee bacterial survival and the expression of a diversity of virulence genes in response to an increase in population density. The study of the molecular mechanisms that relate signal molecules with bacterial pathogenesis is an area of growing interest due to its use as a possible therapeutic alternative through the development of synthetic analogues of autoinducers as a strategy to regulate bacterial communication as well as the study of bacterial resistance phenomena, the study of these relationships is based on the structural diversity of natural or synthetic autoinducers and their ability to inhibit bacterial QS, which can be approached with a molecular perspective from the following topics: i) Molecular signals and their role in QS regulation; ii) Strategies in the modulation of Quorum Sensing; iii) Analysis of Bacterial QS circuit regulation strategies; iv) Structural evolution of natural and synthetic autoinducers as QS regulators. This mini-review allows a molecular view of the QS systems, showing a perspective on the importance of the molecular diversity of autoinducer analogs as a strategy for the design of new antimicrobial agents.
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Affiliation(s)
- Caterine Henríquez Ruiz
- Grupo de Investigación en Química Orgánica y Biomédica. Faculty of Basic Sciences. Universidad del Atlántico. Barranquilla. Colombia
| | - Estefanie Osorio-Llanes
- Faculty of Exact and Natural sciences. Grupo de Investigación Avanzada en Biomedicina. Universidad Libre. Barranquilla. Colombia
| | - Mayra Hernández Trespalacios
- Grupo de Investigación en Química Orgánica y Biomédica. Faculty of Basic Sciences. Universidad del Atlántico. Barranquilla. Colombia
| | - Evelyn Mendoza-Torres
- Faculty of Health Sciences. Grupo de Investigación Avanzada en Biomedicina-Universidad Libre. Barranquilla. Colombia
| | - Wendy Rosales
- Faculty of Exact and Natural sciences. Grupo de Investigación Avanzada en Biomedicina. Universidad Libre. Barranquilla. Colombia
| | - Carlos Mario Meléndez Gómez
- Grupo de Investigación en Química Orgánica y Biomédica. Faculty of Basic Sciences. Universidad del Atlántico. Barranquilla. Colombia
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Bazhenov S, Novoyatlova U, Scheglova E, Fomin V, Khrulnova S, Melkina O, Chistyakov V, Manukhov I. Influence of the luxR Regulatory Gene Dosage and Expression Level on the Sensitivity of the Whole-Cell Biosensor to Acyl-Homoserine Lactone. BIOSENSORS-BASEL 2021; 11:bios11060166. [PMID: 34071046 PMCID: PMC8224577 DOI: 10.3390/bios11060166] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/16/2021] [Accepted: 05/20/2021] [Indexed: 12/11/2022]
Abstract
Aliivibrio fischeri LuxR and Aliivibrio logei LuxR1 and LuxR2 regulatory proteins are quorum sensing transcriptional (QS) activators, inducing promoters of luxICDABEG genes in the presence of an autoinducer (3-oxo-hexanoyl-l-homoserine lactone). In the Aliivibrio cells, luxR genes are regulated by HNS, CRP, LitR, etc. Here we investigated the role of the luxR expression level in LuxI/R QS system functionality and improved the whole-cell biosensor for autoinducer detection. Escherichia coli-based bacterial lux-biosensors were used, in which Photorhabdus luminescensluxCDABE genes were controlled by LuxR-dependent promoters and luxR, luxR1, or luxR2 regulatory genes. We varied either the dosage of the regulatory gene in the cells using additional plasmids, or the level of the regulatory gene expression using the lactose operon promoter. It was shown that an increase in expression level, as well as dosage of the regulatory gene in biosensor cells, leads to an increase in sensitivity (the threshold concentration of AI is reduced by one order of magnitude) and to a two to threefold reduction in response time. The best parameters were obtained for a biosensor with an increased dosage of luxRA. fischeri (sensitivity to 3-oxo-hexanoyl-l-homoserine lactone reached 30–100 pM).
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Affiliation(s)
- Sergey Bazhenov
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; (U.N.); (E.S.); (V.F.); (S.K.); (I.M.)
- Academy of Biology and Biotechnology, Southern Federal University, 344022 Rostov-on-Don, Russia;
- Faculty of Physics, HSE University, 109028 Moscow, Russia
- Correspondence:
| | - Uliana Novoyatlova
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; (U.N.); (E.S.); (V.F.); (S.K.); (I.M.)
| | - Ekaterina Scheglova
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; (U.N.); (E.S.); (V.F.); (S.K.); (I.M.)
| | - Vadim Fomin
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; (U.N.); (E.S.); (V.F.); (S.K.); (I.M.)
| | - Svetlana Khrulnova
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; (U.N.); (E.S.); (V.F.); (S.K.); (I.M.)
- National Research Center for Hematology, 125167 Moscow, Russia
| | - Olga Melkina
- State Research Institute of Genetics and Selection of Industrial Microorganisms of the National Research Center “Kurchatov Institute”, 117545 Moscow, Russia;
| | - Vladimir Chistyakov
- Academy of Biology and Biotechnology, Southern Federal University, 344022 Rostov-on-Don, Russia;
| | - Ilya Manukhov
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia; (U.N.); (E.S.); (V.F.); (S.K.); (I.M.)
- Faculty of Physics, HSE University, 109028 Moscow, Russia
- Federal Research Center of Biological Systems and Agro-technologies of RAS, 460000 Orenburg, Russia
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Jin L, Zhang X, Shi H, Wang W, Qiao Z, Yang W, Du W. Identification of a Novel N-Acyl Homoserine Lactone Synthase, AhyI, in Aeromonas hydrophila and Structural Basis for Its Substrate Specificity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2516-2527. [PMID: 32050067 DOI: 10.1021/acs.jafc.9b07833] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the Gram-negative bacterium Aeromonas hydrophila, N-acyl homoserine lactone (AHL)-mediated quorum sensing (QS) influences pathogenicity, protein secretion, and motility. However, the catalytic mechanism of AHL biosynthesis and the structural basis and substrate specificity for AhyI members remain unclear. In this study, we cloned the ahyI gene from the isolate A. hydrophila HX-3, and the overexpressed AhyI protein was confirmed to produce six types of AHLs by ultraperformance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) analysis, contrasting with previous reports that AhyI only produces N-butanoyl-l-homoserine lactone (C4-HSL) and N-hexanoyl-l-homoserine lactone (C6-HSL). The results of an in vitro biosynthetic assay showed that purified AhyI can catalyze the formation of C4-HSL using S-adenosyl-l-methionine (SAM) and butyryl-acyl carrier protein (ACP) as substrates and indicated that the fatty acyl substrate used in AhyI-mediated AHL synthesis is derived from acyl-ACP rather than acyl-CoA. The kinetic data of AhyI using butyryl-ACP as an acyl substrate indicated that the catalytic efficiency of the A. hydrophila HX-3 AhyI enzyme is within an order of magnitude compared to other LuxI homologues. In this study, for the first time, the tertiary structural modeling results of AhyI and those of molecular docking and structural and functional analyses showed the importance of several crucial residues, as well as the secondary structure with respect to acylation. A Phe125-Phe152 clamp grasps the terminal methyl group to assist in stabilizing the long acyl chains in a putative binding pocket. The stacking interactions within a strong hydrophobic environment, a hydrogen-bonding network, and a β bulge presumably stabilize the ACP acyl chain for the attack of the SAM α-amine toward the thioester carbon, offering a relatively reasonable explanation for how AhyI can synthesize AHLs with diverse acyl-chain lengths. Moreover, Trp34 participates in forming the binding pocket for C4-ACP and becomes ordered upon SAM binding, providing a good basis for catalysis. The novel finding that AhyI can produce both short- and long-chain AHLs enhances current knowledge regarding the variety of AHLs produced by this enzyme. These structural data are expected to serve as a molecular rationale for AHL synthesis by AhyI.
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Affiliation(s)
- Lei Jin
- College of Food and Pharmaceutical Sciences , Ningbo University , Ningbo 315211 , P. R. China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province , Ningbo University , Ningbo 315211 , P. R. China
- Marine Fishery Research Institute of Zhejiang Province , Zhoushan 316021 , P. R. China
| | - Xiaojun Zhang
- Marine Fishery Research Institute of Zhejiang Province , Zhoushan 316021 , P. R. China
- Zhoushan Fishery Environments & Aquatic Products Quality Monitoring Center of Ministry of Agriculture China , Zhoushan 316021 , P. R. China
| | - Hui Shi
- Marine Fishery Research Institute of Zhejiang Province , Zhoushan 316021 , P. R. China
| | - Wei Wang
- Marine Fishery Research Institute of Zhejiang Province , Zhoushan 316021 , P. R. China
| | - Zhaohui Qiao
- College of Food and Pharmaceutical Sciences , Ningbo University , Ningbo 315211 , P. R. China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province , Ningbo University , Ningbo 315211 , P. R. China
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences , Ningbo University , Ningbo 315211 , P. R. China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province , Ningbo University , Ningbo 315211 , P. R. China
| | - Wenyi Du
- Sichuan MoDe Technology Co., Ltd. , Chengdu 610000 , P. R. China
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Fernández-Bravo A, Figueras MJ. An Update on the Genus Aeromonas: Taxonomy, Epidemiology, and Pathogenicity. Microorganisms 2020; 8:microorganisms8010129. [PMID: 31963469 PMCID: PMC7022790 DOI: 10.3390/microorganisms8010129] [Citation(s) in RCA: 249] [Impact Index Per Article: 62.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/10/2020] [Accepted: 01/14/2020] [Indexed: 02/07/2023] Open
Abstract
The genus Aeromonas belongs to the Aeromonadaceae family and comprises a group of Gram-negative bacteria widely distributed in aquatic environments, with some species able to cause disease in humans, fish, and other aquatic animals. However, bacteria of this genus are isolated from many other habitats, environments, and food products. The taxonomy of this genus is complex when phenotypic identification methods are used because such methods might not correctly identify all the species. On the other hand, molecular methods have proven very reliable, such as using the sequences of concatenated housekeeping genes like gyrB and rpoD or comparing the genomes with the type strains using a genomic index, such as the average nucleotide identity (ANI) or in silico DNA–DNA hybridization (isDDH). So far, 36 species have been described in the genus Aeromonas of which at least 19 are considered emerging pathogens to humans, causing a broad spectrum of infections. Having said that, when classifying 1852 strains that have been reported in various recent clinical cases, 95.4% were identified as only four species: Aeromonas caviae (37.26%), Aeromonas dhakensis (23.49%), Aeromonas veronii (21.54%), and Aeromonas hydrophila (13.07%). Since aeromonads were first associated with human disease, gastroenteritis, bacteremia, and wound infections have dominated. The literature shows that the pathogenic potential of Aeromonas is considered multifactorial and the presence of several virulence factors allows these bacteria to adhere, invade, and destroy the host cells, overcoming the immune host response. Based on current information about the ecology, epidemiology, and pathogenicity of the genus Aeromonas, we should assume that the infections these bacteria produce will remain a great health problem in the future. The ubiquitous distribution of these bacteria and the increasing elderly population, to whom these bacteria are an opportunistic pathogen, will facilitate this problem. In addition, using data from outbreak studies, it has been recognized that in cases of diarrhea, the infective dose of Aeromonas is relatively low. These poorly known bacteria should therefore be considered similarly as enteropathogens like Salmonella and Campylobacter.
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Silva KPT, Chellamuthu P, Boedicker JQ. Quantifying the strength of quorum sensing crosstalk within microbial communities. PLoS Comput Biol 2017; 13:e1005809. [PMID: 29049387 PMCID: PMC5663516 DOI: 10.1371/journal.pcbi.1005809] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 10/31/2017] [Accepted: 10/05/2017] [Indexed: 01/12/2023] Open
Abstract
In multispecies microbial communities, the exchange of signals such as acyl-homoserine lactones (AHL) enables communication within and between species of Gram-negative bacteria. This process, commonly known as quorum sensing, aids in the regulation of genes crucial for the survival of species within heterogeneous populations of microbes. Although signal exchange was studied extensively in well-mixed environments, less is known about the consequences of crosstalk in spatially distributed mixtures of species. Here, signaling dynamics were measured in a spatially distributed system containing multiple strains utilizing homologous signaling systems. Crosstalk between strains containing the lux, las and rhl AHL-receptor circuits was quantified. In a distributed population of microbes, the impact of community composition on spatio-temporal dynamics was characterized and compared to simulation results using a modified reaction-diffusion model. After introducing a single term to account for crosstalk between each pair of signals, the model was able to reproduce the activation patterns observed in experiments. We quantified the robustness of signal propagation in the presence of interacting signals, finding that signaling dynamics are largely robust to interference. The ability of several wild isolates to participate in AHL-mediated signaling was investigated, revealing distinct signatures of crosstalk for each species. Our results present a route to characterize crosstalk between species and predict systems-level signaling dynamics in multispecies communities.
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Affiliation(s)
- Kalinga Pavan T. Silva
- Department of Physics and Astronomy, University of Southern California, Los Angeles, CA, United States of America
| | - Prithiviraj Chellamuthu
- Department of Physics and Astronomy, University of Southern California, Los Angeles, CA, United States of America
| | - James Q. Boedicker
- Department of Physics and Astronomy, University of Southern California, Los Angeles, CA, United States of America
- Department of Biological Sciences, University of Southern California, Los Angeles, CA, United States of America
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Ding T, Li T, Wang Z, Li J. Curcumin liposomes interfere with quorum sensing system of Aeromonas sobria and in silico analysis. Sci Rep 2017; 7:8612. [PMID: 28819178 PMCID: PMC5561023 DOI: 10.1038/s41598-017-08986-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 07/19/2017] [Indexed: 11/09/2022] Open
Abstract
Aeromonas sobria is opportunistic pathogen frequently found in environment and food. Interfering with its quorum sensing (QS) system could be a promising way to alleviate its virulence. In this study, curcumin liposomes were prepared and their characteristics like particle size, zeta potential, PDI (Polymey Disperse Index), encapsulation efficiency and loading capacity were measured. The quorum sensing inhibitory effect of curcumin liposomes under sub-MIC (Minimum Inhibitory Concentration) on siderophore production, swimming and swarming motility, extracellular proteases, biofilm formation and AHLs (N-acylhomoserine lactones) production of A. sobria were also determined. The results showed that, the curcumin liposomes with high encapsulation capacity (84.51 ± 0.58%) were stable and homogeneous. QS-regulated phenotypes of the pathogen were significantly inhibited by curcumin liposomes. The in silico analysis revealed that the QS system of A. sobria may be inhibited by released curcumin from curcumin liposomes through interacting with the built LuxI type protein and blocking the production of AHLs.
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Affiliation(s)
- Ting Ding
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.,College of Food Science and Technology, Bohai University, Food Safety Key Lab of Liaoning Province, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou, Liaoning, 121013, China
| | - Tingting Li
- Key Laboratory of Biotechnology and Bioresources Utilization (Dalian Minzu University), Ministry of Education, Dalian, Liaoning, 116600, China
| | - Zhi Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Jianrong Li
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China. .,College of Food Science and Technology, Bohai University, Food Safety Key Lab of Liaoning Province, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou, Liaoning, 121013, China.
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Koul S, Prakash J, Mishra A, Kalia VC. Potential Emergence of Multi-quorum Sensing Inhibitor Resistant (MQSIR) Bacteria. Indian J Microbiol 2015; 56:1-18. [PMID: 26843692 DOI: 10.1007/s12088-015-0558-0] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Accepted: 10/28/2015] [Indexed: 12/15/2022] Open
Abstract
Expression of certain bacterial genes only at a high bacterial cell density is termed as quorum-sensing (QS). Here bacteria use signaling molecules to communicate among themselves. QS mediated genes are generally involved in the expression of phenotypes such as bioluminescence, biofilm formation, competence, nodulation, and virulence. QS systems (QSS) vary from a single in Vibrio spp. to multiple in Pseudomonas and Sinorhizobium species. The complexity of QSS is further enhanced by the multiplicity of signals: (1) peptides, (2) acyl-homoserine lactones, (3) diketopiperazines. To counteract this pathogenic behaviour, a wide range of bioactive molecules acting as QS inhibitors (QSIs) have been elucidated. Unlike antibiotics, QSIs don't kill bacteria and act at much lower concentration than those of antibiotics. Bacterial ability to evolve resistance against multiple drugs has cautioned researchers to develop QSIs which may not generate undue pressure on bacteria to develop resistance against them. In this paper, we have discussed the implications of the diversity and multiplicity of QSS, in acting as an arsenal to withstand attack from QSIs and may use these as reservoirs to develop multi-QSI resistance.
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Affiliation(s)
- Shikha Koul
- Microbial Biotechnology and Genomics, CSIR - Institute of Genomics and Integrative Biology (IGIB), Delhi University Campus, Mall Road, Delhi, 110007 India ; Academy for Scientific and Innovative Research (AcSIR), 2 Rafi Marg, New Delhi, 110001 India
| | - Jyotsana Prakash
- Microbial Biotechnology and Genomics, CSIR - Institute of Genomics and Integrative Biology (IGIB), Delhi University Campus, Mall Road, Delhi, 110007 India ; Academy for Scientific and Innovative Research (AcSIR), 2 Rafi Marg, New Delhi, 110001 India
| | - Anjali Mishra
- Microbial Biotechnology and Genomics, CSIR - Institute of Genomics and Integrative Biology (IGIB), Delhi University Campus, Mall Road, Delhi, 110007 India
| | - Vipin Chandra Kalia
- Microbial Biotechnology and Genomics, CSIR - Institute of Genomics and Integrative Biology (IGIB), Delhi University Campus, Mall Road, Delhi, 110007 India ; Academy for Scientific and Innovative Research (AcSIR), 2 Rafi Marg, New Delhi, 110001 India
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