1
|
Ren Y, Zhu R, You X, Li D, Guo M, Fei B, Liu Y, Yang X, Liu X, Li Y. Quercetin: a promising virulence inhibitor of Pseudomonas aeruginosa LasB in vitro. Appl Microbiol Biotechnol 2024; 108:57. [PMID: 38180553 PMCID: PMC10770215 DOI: 10.1007/s00253-023-12890-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 11/15/2023] [Accepted: 11/19/2023] [Indexed: 01/06/2024]
Abstract
With the inappropriate use of antibiotics, antibiotic resistance has emerged as a major dilemma for patients infected with Pseudomonas aeruginosa. Elastase B (LasB), a crucial extracellular virulence factor secreted by P. aeruginosa, has been identified as a key target for antivirulence therapy. Quercetin, a natural flavonoid, exhibits promising potential as an antivirulence agent. We aim to evaluate the impact of quercetin on P. aeruginosa LasB and elucidate the underlying mechanism. Molecular docking and molecular dynamics simulation revealed a rather favorable intermolecular interaction between quercetin and LasB. At the sub-MICs of ≤256 μg/ml, quercetin was found to effectively inhibit the production and activity of LasB elastase, as well as downregulate the transcription level of the lasB gene in both PAO1 and clinical strains of P. aeruginosa. Through correlation analysis, significant positive correlations were shown between the virulence gene lasB and the QS system regulatory genes lasI, lasR, rhlI, and rhlR in clinical strains of P. aeruginosa. Then, we found the lasB gene expression and LasB activity were significantly deficient in PAO1 ΔlasI and ΔlasIΔrhlI mutants. In addition, quercetin significantly downregulated the expression levels of regulated genes lasI, lasR, rhlI, rhlR, pqsA, and pqsR as well as effectively attenuated the synthesis of signaling molecules 3-oxo-C12-HSL and C4-HSL in the QS system of PAO1. Quercetin was also able to compete with the natural ligands OdDHL, BHL, and PQS for binding to the receptor proteins LasR, RhlR, and PqsR, respectively, resulting in the formation of more stabilized complexes. Taken together, quercetin exhibits enormous potential in combating LasB production and activity by disrupting the QS system of P. aeruginosa in vitro, thereby offering an alternative approach for the antivirulence therapy of P. aeruginosa infections. KEY POINTS: • Quercetin diminished the content and activity of LasB elastase of P. aeruginosa. • Quercetin inhibited the QS system activity of P. aeruginosa. • Quercetin acted on LasB based on the QS system.
Collapse
Affiliation(s)
- Yanying Ren
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Rui Zhu
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
- Henan Province Hospital of Traditional Chinese Medicine, The Second Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450002, China
| | - Xiaojuan You
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
- Henan Province Hospital of Traditional Chinese Medicine, The Second Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450002, China
| | - Dengzhou Li
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
- Henan Province Hospital of Traditional Chinese Medicine, The Second Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450002, China
| | - Mengyu Guo
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Bing Fei
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Ying Liu
- Henan University of Chinese Medicine, Zhengzhou, 450046, China
| | - Ximing Yang
- Dongzhimen Hospital of Beijing University of Chinese Medicine, Peking, 100700, China.
| | - Xinwei Liu
- Henan University of Chinese Medicine, Zhengzhou, 450046, China.
- Henan Province Hospital of Traditional Chinese Medicine, The Second Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450002, China.
| | - Yongwei Li
- Henan University of Chinese Medicine, Zhengzhou, 450046, China.
- Henan Province Hospital of Traditional Chinese Medicine, The Second Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, 450002, China.
- The Key Laboratory of Pathogenic Microbes & Antimicrobial Resistance Surveillance of Zhengzhou, Zhengzhou, 450002, China.
- Henan Engineering Research Center for Identification of Pathogenic Microbes, Zhengzhou, 450002, China.
- Henan Provincial Key Laboratory of Antibiotics-Resistant Bacterial Infection Prevention & Therapy with Traditional Chinese Medicine, Zhengzhou, 450002, China.
| |
Collapse
|
2
|
Jiang C, Zheng L, Yan YJ, Wang M, Liu XJ, Dai JY. A Supramolecular Antibiotic Targeting Drug-Resistant Pseudomonas aeruginosa through the Inhibition of Virulence Factors and Activation of Acquired Immunity. ACS APPLIED MATERIALS & INTERFACES 2024; 16:41828-41842. [PMID: 39088848 DOI: 10.1021/acsami.4c06665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/03/2024]
Abstract
The bacterium Pseudomonas aeruginosa is an exceptionally resilient opportunistic pathogen, presenting formidable challenges for treatment due to its proclivity for developing drug resistance. To address this predicament, we have devised a self-assembled supramolecular antibiotic known as dHTSN1@pHPplus, which can circumvent the drug resistance mechanism of Pseudomonas aeruginosa and effectively combat Pseudomonas aeruginosa infection by impeding the secretion of key virulence factors through the inhibition of the type III secretion system while simultaneously mobilizing immune cells to eradicate Pseudomonas aeruginosa. Furthermore, dHTSN1@pHPplus was ingeniously engineered with infection-targeting capabilities, enabling it to selectively concentrate precisely at the site of infection. As anticipated, the administration of dHTSN1@pHPplus exhibited a remarkable therapeutic efficacy in combating dual resistance to Meropenem and imipenem in a mouse model of P. aeruginosa lung infection. The results obtained from metagenomic detection further confirmed these findings, demonstrating a significant reduction in the proportion of Pseudomonas aeruginosa compared to untreated mice with Pseudomonas aeruginosa-infected lungs. Additionally, no notable acute toxicity was observed in the acute toxicity experiments. The present study concludes that the remarkable efficacy of dHTSN1@pHPplus in treating drug-resistant P. aeruginosa infection confirms its immense potential as a groundbreaking antibiotic agent for combating drug-resistant P. aeruginosa.
Collapse
Affiliation(s)
- Cheng Jiang
- Department of Hepatobiliary Surgery, Air Force Medical Center, Fourth Military Medical University, Beijing 100142, PR China
- Graduate School of China Medical University, Shenyang 110000, China
| | - Lei Zheng
- Department of Hepatobiliary Surgery, Air Force Medical Center, Fourth Military Medical University, Beijing 100142, PR China
- Graduate School of China Medical University, Shenyang 110000, China
| | - Yu-Jie Yan
- The College of Life Sciences, Northwest University, Xi'an, Shaanxi 710072, China
| | - Miao Wang
- Key Laboratory for Space Biosciences and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
| | - Xiao-Jing Liu
- Department of Infectious Disease, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, PR China
| | - Jing-Yao Dai
- Department of Hepatobiliary Surgery, Air Force Medical Center, Fourth Military Medical University, Beijing 100142, PR China
- Fourth Military Medical University, Xi'an, Shaanxi 710072, PR China
| |
Collapse
|
3
|
Mu Z, Zeng Y, Liu S, Ge W, Yang S, Ji C, Jia X, Li G. Target-Triggered Aggregation of Modified E. coli for Diagnosis of Ovarian Cancer. Anal Chem 2024; 96:12767-12775. [PMID: 39044392 DOI: 10.1021/acs.analchem.4c01954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Bacteria inherently possess the capability of quorum sensing in response to the environment. In this work, we have proposed a strategy to confer bacteria with the ability to recognize targets with quorum-sensing behavior. Meanwhile, we have successfully achieved artificial control over the target-triggered aggregation of Escherichia coli (E. coli) by modifying the bacteria surface in a new way. Furthermore, by making use of green fluorescent protein (GFP) expressed by E. coli as the output signal, the aggregation of modified E. coli can be observed with the naked eye. Therefore, via the detection of the target, MUC1, an ovarian cancer biomarker, a simple and conveniently operated method to diagnose ovarian cancer is developed in this work. Experimental results show that the developed low-background and enzyme-free amplification method enables the highly sensitive detection of MUC1, achieving a remarkable limit of detection (LOD) of 5.47 fM and a linear detection range spanning from 1 pM to 50 nM and 50 nM to 100 nM, respectively. Clinical samples from healthy donors and patients can give distant assay results, showing great potential for clinical applications of this method.
Collapse
Affiliation(s)
- Zheying Mu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Life Sciences, Nanjing University, Nanjing 210023, PR China
| | - Yujing Zeng
- State Key Laboratory of Analytical Chemistry for Life Science, School of Life Sciences, Nanjing University, Nanjing 210023, PR China
| | - Siyu Liu
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, Nanjing 210004, PR China
| | - Weikang Ge
- State Key Laboratory of Analytical Chemistry for Life Science, School of Life Sciences, Nanjing University, Nanjing 210023, PR China
| | - Shiao Yang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Life Sciences, Nanjing University, Nanjing 210023, PR China
| | - Chenbo Ji
- Nanjing Maternal and Child Health Institute, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, Nanjing 210004, PR China
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, Nanjing 210004, PR China
| | - Xuemei Jia
- Department of Gynecology, Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, Nanjing 210004, PR China
- Nanjing Key Laboratory of Female Fertility Preservation and Restoration, Nanjing 210004, PR China
| | - Genxi Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Life Sciences, Nanjing University, Nanjing 210023, PR China
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai 200444, PR China
| |
Collapse
|
4
|
Kandel SE, Tooker BC, Lampe JN. Drug metabolism of ciprofloxacin, ivacaftor, and raloxifene by Pseudomonas aeruginosa cytochrome P450 CYP107S1. J Biol Chem 2024:107594. [PMID: 39032655 DOI: 10.1016/j.jbc.2024.107594] [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: 04/30/2024] [Revised: 06/29/2024] [Accepted: 07/13/2024] [Indexed: 07/23/2024] Open
Abstract
Drug metabolism is one of the main processes governing the pharmacokinetics and toxicity of drugs via their chemical biotransformation and elimination. In humans, the liver, enriched with cytochrome P450 (CYP) enzymes, plays a major metabolic and detoxification role. The gut microbiome and its complex community of microorganisms can also contribute to some extent to drug metabolism. However, during an infection when pathogenic microorganisms invade the host, our knowledge of the impact on drug metabolism by this pathobiome remains limited. The intrinsic resistance mechanisms and rapid metabolic adaptation to new environments often allow the human bacterial pathogens to persist, despite the many antibiotic therapies available. Here, we demonstrate that a bacterial CYP enzyme, CYP107S1, from Pseudomonas aeruginosa, a predominant bacterial pathogen in cystic fibrosis (CF) patients, can metabolize multiple drugs from different classes. CYP107S1 demonstrated high substrate promiscuity and allosteric properties much like human hepatic CYP3A4. Our findings demonstrated binding and metabolism by the recombinant CYP107S1 of fluoroquinolone antibiotics (ciprofloxacin and fleroxacin), a CF transmembrane conductance regulator potentiator (ivacaftor), and a SERM antimicrobial adjuvant (raloxifene). Our in vitro metabolism data were further corroborated by molecular docking of each drug to the heme active site using a CYP107S1 homology model. Our findings raise the potential for microbial pathogens modulating drug concentrations locally at the site of infection, if not systemically, via CYP-mediated biotransformation reactions. To our knowledge, this is the first report of a CYP enzyme from a known bacterial pathogen that is capable of metabolizing clinically utilized drugs.
Collapse
Affiliation(s)
- Sylvie E Kandel
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy, University of Colorado, Aurora, CO 80045, USA
| | - Brian C Tooker
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy, University of Colorado, Aurora, CO 80045, USA
| | - Jed N Lampe
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy, University of Colorado, Aurora, CO 80045, USA.
| |
Collapse
|
5
|
Zeng X, Feng M, Lu J, Wang R, Deng L, Yang Y, Luo L. Beyond transcription, aryl hydrocarbon receptor plays a protective role in periodontitis by interacting with CaMKII. J Periodontol 2024. [PMID: 38967396 DOI: 10.1002/jper.24-0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/26/2024] [Accepted: 06/06/2024] [Indexed: 07/06/2024]
Abstract
BACKGROUND The aryl hydrocarbon receptor (AhR) has been studied as an intracellular pattern recognition receptor that can identify bacterial pigments. To identify a potential therapeutic target for periodontitis, we investigated the expression of AhR in periodontitis and its role in the pathogenesis of periodontitis. METHODS First, we analyzed AhR expression in a single-cell dataset from human periodontal tissue. Quantitative polymerase chain reaction (qPCR), immunofluorescence, and immunohistochemistry were used to verify the AhR level. Later, we determined the phenotypes of ligature-induced periodontitis in myeloid-specific AhR-deficient mice (Lyz2-Cre+/- AhRfx/fx), after which RNA sequencing (RNA-seq), qPCR, Western blot, immunofluorescence, and immunohistochemistry were used to investigate the impacts of AhR on periodontitis and its mechanism. Finally, we determined the therapeutic effect of AhR agonist 6-Formylindolo[3,2-b]carbazole (FICZ) administration on murine periodontitis and verified the effects of FICZ on macrophage polarization in vitro. RESULTS AhR expression was enhanced in macrophages from periodontitis patients. Deletion of AhR from macrophages aggravated ligature-induced periodontitis and promoted the inflammatory response. Calcium/calmodulin-stimulated protein kinase II (CaMKII) phosphorylation was accelerated in AhR-deficient macrophages. Inhibiting CaMKII phosphorylation ameliorated periodontitis in Lyz2-Cre+/- AhRfx/fx mice. FICZ treatment blocked alveolar bone loss and relieved periodontal inflammation. FICZ diminished M1 macrophage polarization and promoted M2 macrophage polarization upon M1 macrophage induction. CONCLUSION AhR played a protective role in the pathogenesis of periodontitis by orchestrating macrophage polarization via interacting with the CaMKII signaling pathway.
Collapse
Affiliation(s)
- Xuwen Zeng
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
- i3S - Instituto de Investigação e Inovação em Saúde (Institute for Research and Innovation in Health), University of Porto, Porto, Portugal
- IBMC - Instituto de Biologia Molecular e Celular (Institute for Molecular and Cell Biology), University of Porto, Porto, Portugal
| | - Meiting Feng
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| | - Jiawei Lu
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| | - Ruiling Wang
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| | - Li Deng
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| | - Yanan Yang
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| | - Lijun Luo
- Department of Periodontology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| |
Collapse
|
6
|
Riahi A, Mabudi H, Tajbakhsh E, Roomiani L, Momtaz H. Optimizing chitosan derived from Metapenaeus affinis: a novel anti-biofilm agent against Pseudomonas aeruginosa. AMB Express 2024; 14:77. [PMID: 38949677 PMCID: PMC11217230 DOI: 10.1186/s13568-024-01732-1] [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: 05/11/2024] [Accepted: 06/19/2024] [Indexed: 07/02/2024] Open
Abstract
Pseudomonas aeruginosa is a commonly found Gram-negative bacterium in healthcare facilities and is renowned for its ability to form biofilms and its virulence factors that are controlled by quorum sensing (QS) systems. The increasing prevalence of multidrug-resistant strains of this bacterium poses a significant challenge in the field of medicine. Consequently, the exploration of novel antimicrobial agents has become a top priority. This research aims to optimize chitosan derived from white shrimp (Metapenaeus affinis) using the Response Surface Methodology (RSM) computational approach. The objective is to investigate chitosan's potential as a solution for inhibiting QS activity and biofilm formation in P. aeruginosa ATCC 10,145. Under optimized conditions, chitin was treated with NaOH (1.41 M) for 15.75 h, HCl (7.49% vol) for 2.01 h, and at a deacetylation temperature of 81.15 °C. The resulting chitosan exhibited a degree of deacetylation (DD%) exceeding 93.98%, as confirmed by Fourier-transform infrared (FTIR) spectral analysis, indicating its high purity. The extracted chitosan demonstrated a significant synergistic antibiotic effect against P. aeruginosa when combined with ceftazidime, enhancing its bactericidal activity by up to 15-fold. In addition, sub-MIC (minimum inhibitory concentration) concentrations of extracted chitosan (10 and 100 µg/mL) successfully reduced the production of pyocyanin and rhamnolipid, as well as the swimming motility, protease activity and biofilm formation ability in comparison to the control group (P < 0.05). Moreover, chitosan treatment downregulated the RhlR and LasR genes in P. aeruginosa when compared to the control group (P < 0.05). The optimized chitosan extract shows significant potential as a coating agent for surgical equipment, effectively preventing nosocomial infections caused by P. aeruginosa pathogens.
Collapse
Affiliation(s)
- Anali Riahi
- Department of Microbiology, Faculty of Basic Sciences, Islamic Azad University, Shahrekord Branch, Shahrekord, Iran
| | - Hadideh Mabudi
- Department of Fisheries, Islamic Azad University, Golestan highway, Farhang Shahr, Ahvaz Branch, PO Box 1915, 61349-37333, Ahvaz, Iran.
| | - Elahe Tajbakhsh
- Department of Microbiology, Faculty of Basic Sciences, Islamic Azad University, Shahrekord Branch, Shahrekord, Iran
| | - Laleh Roomiani
- Department of Fisheries, Islamic Azad University, Golestan highway, Farhang Shahr, Ahvaz Branch, PO Box 1915, 61349-37333, Ahvaz, Iran
| | - Hasan Momtaz
- Department of Microbiology, Faculty of Basic Sciences, Islamic Azad University, Shahrekord Branch, Shahrekord, Iran
| |
Collapse
|
7
|
Malany K, Li X, Vogel CFA, Ehrlich AK. Mechanisms underlying aryl hydrocarbon receptor-driven divergent macrophage function. Toxicol Sci 2024; 200:1-10. [PMID: 38603630 PMCID: PMC11199922 DOI: 10.1093/toxsci/kfae050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024] Open
Abstract
Macrophages play an essential role in the innate immune system by differentiating into functionally diverse subsets in order to fight infection, repair damaged tissues, and regulate inappropriate immune responses. This functional diversity stems from their ability to adapt and respond to signals in the environment, which is in part mediated through aryl hydrocarbon receptor (AHR)-signaling. AHR, an environmental sensor, can be activated by various ligands, ranging from environmental contaminants to microbially derived tryptophan metabolites. This review discusses what is currently known about how AHR-signaling influences macrophage differentiation, polarization, and function. By discussing studies that are both consistent and divergent, our goal is to highlight the need for future research on the mechanisms by which AHR acts as an immunological switch in macrophages. Ultimately, understanding the contexts in which AHR-signaling promotes and/or inhibits differentiation, proinflammatory functions, and immunoregulatory functions, will help uncover functional predictions of immunotoxicity following exposure to environmental chemicals as well as better design AHR-targeted immunotherapies.
Collapse
Affiliation(s)
- Keegan Malany
- Department of Environmental Toxicology, University of California, Davis, California, USA
| | - Xiaohan Li
- Center for Health and the Environment, University of California, Davis, California, USA
| | - Christoph F A Vogel
- Department of Environmental Toxicology, University of California, Davis, California, USA
- Center for Health and the Environment, University of California, Davis, California, USA
| | - Allison K Ehrlich
- Department of Environmental Toxicology, University of California, Davis, California, USA
| |
Collapse
|
8
|
Qin M, Zhang X, Ding H, Chen Y, He W, Wei Y, Chen W, Chan YK, Shi Y, Huang D, Deng Y. Engineered Probiotic Bio-Heterojunction with Robust Antibiofilm Modality via "Eating" Extracellular Polymeric Substances for Wound Regeneration. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2402530. [PMID: 38924628 DOI: 10.1002/adma.202402530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 06/14/2024] [Indexed: 06/28/2024]
Abstract
The compact three-dimensional (3D) structure of extracellular polymeric substances (EPS) within biofilms significantly hinders the penetration of antimicrobial agents, making biofilm eradication challenging and resulting in persistent biofilm-associated infections. To address this challenge, a solution is proposed: a probiotic bio-heterojunction (P-bioHJ) combining Lactobacillus rhamnosus with MXene (Ti3C2) quantum dots (MQDs)/FeS heterojunction. This innovation aims to break down the saccharides in EPS, enabling effective combat against biofilm-associated infections. Initially, the P-bioHJ targets saccharides through metabolic processes, causing the collapse of EPS and allowing infiltration into bacterial colonies. Simultaneously, upon exposure to near-infrared (NIR) irradiation, the P-bioHJ produces reactive oxygen species (ROS) and thermal energy, deploying physical mechanisms to combat bacterial biofilms effectively. Following antibiofilm treatment, the P-bioHJ adjusts the oxidative environment, reduces wound inflammation by scavenging ROS, boosts antioxidant enzyme activity, and mitigates the NF-κB inflammatory pathway, thereby accelerating wound healing. In vitro and in vivo experiments confirm the exceptional antibiofilm, antioxidant/anti-inflammatory, and wound-regeneration properties of P-bioHJ. In conclusion, this study provides a promising approach for treating biofilm-related infections.
Collapse
Affiliation(s)
- Miao Qin
- Research Center for Nano-Biomaterials & Regenerative Medicine, Department of Biomedical Engineering, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Xiumei Zhang
- Research Center for Nano-Biomaterials & Regenerative Medicine, Department of Biomedical Engineering, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Haiyang Ding
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yanbai Chen
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Wenxuan He
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yan Wei
- Research Center for Nano-Biomaterials & Regenerative Medicine, Department of Biomedical Engineering, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, 030060, China
| | - Weiyi Chen
- Research Center for Nano-Biomaterials & Regenerative Medicine, Department of Biomedical Engineering, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, 030060, China
| | - Yau Kei Chan
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, 999077, China
| | - Yiwei Shi
- NHC Key Laboratory of Pneumoconiosis, Shanxi Key Laboratory of Respiratory Diseases, Department of Pulmonary and Critical Care Medicine, The First Hospital of Shanxi Medical University, Taiyuan, 030001, China
| | - Di Huang
- Research Center for Nano-Biomaterials & Regenerative Medicine, Department of Biomedical Engineering, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
- Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, 030060, China
| | - Yi Deng
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, 999077, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
9
|
Jonić N, Koprivica I, Chatzigiannis CM, Tsiailanis AD, Kyrkou SG, Tzakos EP, Pavić A, Dimitrijević M, Jovanović A, Jovanović MB, Marinho S, Castro-Almeida I, Otašević V, Moura-Alves P, Tzakos AG, Stojanović I. Development of FluoAHRL: A Novel Synthetic Fluorescent Compound That Activates AHR and Potentiates Anti-Inflammatory T Regulatory Cells. Molecules 2024; 29:2988. [PMID: 38998940 PMCID: PMC11243367 DOI: 10.3390/molecules29132988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/05/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
Aryl Hydrocarbon Receptor (AHR) ligands, upon binding, induce distinct gene expression profiles orchestrated by the AHR, leading to a spectrum of pro- or anti-inflammatory effects. In this study, we designed, synthesized and evaluated three indole-containing potential AHR ligands (FluoAHRL: AGT-4, AGT-5 and AGT-6). All synthesized compounds were shown to emit fluorescence in the near-infrared. Their AHR agonist activity was first predicted using in silico docking studies, and then confirmed using AHR luciferase reporter cell lines. FluoAHRLs were tested in vitro using mouse peritoneal macrophages and T lymphocytes to assess their immunomodulatory properties. We then focused on AGT-5, as it illustrated the predominant anti-inflammatory effects. Notably, AGT-5 demonstrated the ability to foster anti-inflammatory regulatory T cells (Treg) while suppressing pro-inflammatory T helper (Th)17 cells in vitro. AGT-5 actively induced Treg differentiation from naïve CD4+ cells, and promoted Treg proliferation, cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) expression and interleukin-10 (IL-10) production. The increase in IL-10 correlated with an upregulation of Signal Transducer and Activator of Transcription 3 (STAT3) expression. Importantly, the Treg-inducing effect of AGT-5 was also observed in human tonsil cells in vitro. AGT-5 showed no toxicity when applied to zebrafish embryos and was therefore considered safe for animal studies. Following oral administration to C57BL/6 mice, AGT-5 significantly upregulated Treg while downregulating pro-inflammatory Th1 cells in the mesenteric lymph nodes. Due to its fluorescent properties, AGT-5 could be visualized both in vitro (during uptake by macrophages) and ex vivo (within the lamina propria of the small intestine). These findings make AGT-5 a promising candidate for further exploration in the treatment of inflammatory and autoimmune diseases.
Collapse
Affiliation(s)
- Natalija Jonić
- Department of Immunology, Institute for Biological Research “Siniša Stanković”—National Institute of the Republic of Serbia, University of Belgrade, 11108 Belgrade, Serbia; (N.J.); (I.K.); (M.D.)
| | - Ivan Koprivica
- Department of Immunology, Institute for Biological Research “Siniša Stanković”—National Institute of the Republic of Serbia, University of Belgrade, 11108 Belgrade, Serbia; (N.J.); (I.K.); (M.D.)
| | - Christos M. Chatzigiannis
- Section of Organic Chemistry & Biochemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece; (C.M.C.); (A.D.T.); (S.G.K.)
| | - Antonis D. Tsiailanis
- Section of Organic Chemistry & Biochemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece; (C.M.C.); (A.D.T.); (S.G.K.)
| | - Stavroula G. Kyrkou
- Section of Organic Chemistry & Biochemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece; (C.M.C.); (A.D.T.); (S.G.K.)
| | | | - Aleksandar Pavić
- Laboratory for Microbial Molecular Genetics and Ecology, Institute for Molecular Genetics and Genetic Engineering, University of Belgrade, 11000 Belgrade, Serbia;
| | - Mirjana Dimitrijević
- Department of Immunology, Institute for Biological Research “Siniša Stanković”—National Institute of the Republic of Serbia, University of Belgrade, 11108 Belgrade, Serbia; (N.J.); (I.K.); (M.D.)
| | - Andjelina Jovanović
- Department of Otorhinolaryngology with Maxillofacial Surgery, Clinical Hospital Center “Zemun”, 11080 Belgrade, Serbia; (A.J.); (M.B.J.)
| | - Milan B. Jovanović
- Department of Otorhinolaryngology with Maxillofacial Surgery, Clinical Hospital Center “Zemun”, 11080 Belgrade, Serbia; (A.J.); (M.B.J.)
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Sérgio Marinho
- Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, 4200-135 Porto, Portugal; (S.M.); (I.C.-A.)
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
| | - Inês Castro-Almeida
- Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, 4200-135 Porto, Portugal; (S.M.); (I.C.-A.)
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
| | - Vesna Otašević
- Department of Molecular Biology, Institute for Biological Research “Siniša Stanković”—National Institute of the Republic of Serbia, University of Belgrade, 11108 Belgrade, Serbia;
| | - Pedro Moura-Alves
- Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, 4200-135 Porto, Portugal; (S.M.); (I.C.-A.)
- Instituto de Investigação e Inovação em Saúde (i3S), Universidade do Porto, 4200-135 Porto, Portugal
| | - Andreas G. Tzakos
- Section of Organic Chemistry & Biochemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece; (C.M.C.); (A.D.T.); (S.G.K.)
- Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 45110 Ioannina, Greece
| | - Ivana Stojanović
- Department of Immunology, Institute for Biological Research “Siniša Stanković”—National Institute of the Republic of Serbia, University of Belgrade, 11108 Belgrade, Serbia; (N.J.); (I.K.); (M.D.)
| |
Collapse
|
10
|
Schmidt AK, Schwartzkopf CM, Pourtois JD, Burgener EB, Faith DR, Joyce A, Lamma T, Kumar G, Bollyky PL, Secor PR. Targeted deletion of Pf prophages from diverse Pseudomonas aeruginosa isolates has differential impacts on quorum sensing and virulence traits. J Bacteriol 2024; 206:e0040223. [PMID: 38687034 PMCID: PMC11112994 DOI: 10.1128/jb.00402-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Accepted: 04/02/2024] [Indexed: 05/02/2024] Open
Abstract
Pseudomonas aeruginosa is an opportunistic bacterial pathogen that commonly causes medical hardware, wound, and respiratory infections. Temperate filamentous Pf phages that infect P. aeruginosa impact numerous virulence phenotypes. Most work on Pf phages has focused on Pf4 and its host P. aeruginosa PAO1. Expanding from Pf4 and PAO1, this study explores diverse Pf phages infecting P. aeruginosa clinical isolates. We describe a simple technique targeting the Pf lysogeny maintenance gene, pflM (PA0718), that enables the effective elimination of Pf prophages from diverse P. aeruginosa hosts. The pflM gene shows diversity among different Pf phage isolates; however, all examined pflM alleles encode the DUF5447 domain. We demonstrate that pflM deletion results in prophage excision but not replication, leading to total prophage loss, indicating a role for lysis/lysogeny decisions for the DUF5447 domain. This study also assesses the effects different Pf phages have on host quorum sensing, biofilm formation, pigment production, and virulence against the bacterivorous nematode Caenorhabditis elegans. We find that Pf phages have strain-specific impacts on quorum sensing and biofilm formation, but nearly all suppress pigment production and increase C. elegans avoidance behavior. Collectively, this research not only introduces a valuable tool for Pf prophage elimination from diverse P. aeruginosa isolates but also advances our understanding of the complex relationship between P. aeruginosa and filamentous Pf phages.IMPORTANCEPseudomonas aeruginosa is an opportunistic bacterial pathogen that is frequently infected by filamentous Pf phages (viruses) that integrate into its chromosome, affecting behavior. Although prior work has focused on Pf4 and PAO1, this study investigates diverse Pf in clinical isolates. A simple method targeting the deletion of the Pf lysogeny maintenance gene pflM (PA0718) effectively eliminates Pf prophages from clinical isolates. The research evaluates the impact Pf prophages have on bacterial quorum sensing, biofilm formation, and virulence phenotypes. This work introduces a valuable tool to eliminate Pf prophages from clinical isolates and advances our understanding of P. aeruginosa and filamentous Pf phage interactions.
Collapse
Affiliation(s)
- Amelia K. Schmidt
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | | | - Julie D. Pourtois
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Elizabeth B. Burgener
- Division of Pediatric Pulmonology and Sleep Medicine, Children’s Hospital of Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
- Center for Excellence in Pulmonary Biology, Department of Pediatrics, Stanford University, Stanford, California, USA
| | - Dominick R. Faith
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Alex Joyce
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Tyrza Lamma
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Geetha Kumar
- School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri, Kerala, India
| | - Paul L. Bollyky
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Patrick R. Secor
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| |
Collapse
|
11
|
Huang FC, Huang SC. Unveiling the Novel Benefits of Co-Administering Butyrate and Active Vitamin D3 in Mice Subjected to Chemotherapy-Induced Gut-Derived Pseudomonas aeruginosa Sepsis. Biomedicines 2024; 12:1026. [PMID: 38790988 PMCID: PMC11118095 DOI: 10.3390/biomedicines12051026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 04/22/2024] [Accepted: 04/30/2024] [Indexed: 05/26/2024] Open
Abstract
Cancer patients face increased susceptibility to invasive infections, primarily due to ulcerative lesions on mucosal surfaces and immune suppression resulting from chemotherapy. Pseudomonas aeruginosa (P. aeruginosa) bacteremia is notorious for its rapid progression into fatal sepsis, posing a significant threat to cancer patients, particularly those experiencing chemotherapy-induced neutropenia. This bacterial infection contributes significantly to morbidity and mortality rates among such individuals. Our latest report showed the mutually beneficial effects of postbiotic butyrate on 1,25-dihydroxyvitamin D3 (1,25D3)-controlled innate immunity during Salmonella colitis. Hence, we investigated the impact of butyrate and 1,25D3 on chemotherapy-induced gut-derived P. aeruginosa sepsis in mice. The chemotherapy-induced gut-derived P. aeruginosa sepsis model was established through oral administration of 1 × 107 CFU of the P. aeruginosa wild-type strain PAO1 in C57BL/6 mice undergoing chemotherapy. Throughout the infection process, mice were orally administered butyrate and/or 1,25D3. Our observations revealed that the combined action of butyrate and 1,25D3 led to a reduction in the severity of colitis and the invasion of P. aeruginosa into the liver and spleen of the mice. This reduction was attributed to an enhancement in the expression of defensive cytokines and antimicrobial peptides within the cecum, coupled with decreased levels of zonulin and claudin-2 proteins in the mucosal lining. These effects were notably more pronounced when compared to treatments administered individually. This study unveils a promising alternative therapy that involves combining postbiotics and 1,25D3 for treating chemotherapy-induced gut-derived P. aeruginosa sepsis.
Collapse
Affiliation(s)
- Fu-Chen Huang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan
| | - Shun-Chen Huang
- Department of Anatomic Pathology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan;
| |
Collapse
|
12
|
He Y, Han C, Li C, Yin X, Wang J, Gu L, Yan R, Liu B, Zhou X, He W. Role of N-acetylkynurenine in mediating the effect of gut microbiota on urinary tract infection: a Mendelian randomization study. Front Microbiol 2024; 15:1384095. [PMID: 38711967 PMCID: PMC11070472 DOI: 10.3389/fmicb.2024.1384095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 04/02/2024] [Indexed: 05/08/2024] Open
Abstract
Introduction This study explored the causal connections between gut microbiota (GM), urinary tract infection (UTI), and potential metabolite mediators using Mendelian randomization (MR). Methods We utilized summary statistics from the most comprehensive and extensive genome-wide association studies (GWAS) available to date, including 196 bacterial traits for GM, 1,091 blood metabolites, 309 metabolite ratios, alongside UTI data from ukb-b-8814 and ebi-a-GCST90013890. Bidirectional MR analyses were conducted to investigate the causal links between GM and UTI. Subsequently, two MR analyses were performed to identify the potential mediating metabolites, followed by a two-step MR analysis to quantify the mediation proportion. Results Our findings revealed that out of the total 15 bacterial traits, significant associations with UTI risk were observed across both datasets. Particularly, taxon g_Ruminococcaceae UCG010 displayed a causal link with a diminished UTI risk in both datasets (ukb-b-8814: odds ratio [OR] = 0.9964, 95% confidence interval [CI] = 0.9930-0.9997, P = 0.036; GCST90013890: OR = 0.8252, 95% CI = 0.7217-0.9436, P = 0.005). However, no substantial changes in g_Ruminococcaceae UCG010 due to UTI were noted (ukb-b-8814: β = 0.51, P = 0.87; ebi-a-GCST90013890: β = -0.02, P = 0.77). Additionally, variations in 56 specific metabolites were induced by g_Ruminococcaceae UCG010, with N-acetylkynurenine (NAK) exhibiting a causal correlation with UTI. A negative association was found between g_Ruminococcaceae UCG010 and NAK (OR: 0.8128, 95% CI: 0.6647-0.9941, P = 0.044), while NAK was positively associated with UTI risk (OR: 1.0009; 95% CI: 1.0002-1.0016; P = 0.0173). Mediation analysis revealed that the association between g_Ruminococcaceae UCG010 and UTI was mediated by NAK with a mediation proportion of 5.07%. Discussion This MR study provides compelling evidence supporting the existence of causal relationships between specific GM taxa and UTI, along with potential mediating metabolites.
Collapse
Affiliation(s)
- Yining He
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Chao Han
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Yancheng Dafeng Hospital of Chinese Medicine, Teaching Hospital of Nanjing University of Chinese Medicine, Yancheng, China
| | - Chengjuan Li
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Xiaofan Yin
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Jiawen Wang
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Lina Gu
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Ruxue Yan
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Buhui Liu
- Department of Human Anatomy, Xuzhou Medical University, Xuzhou, China
| | - Xuan Zhou
- Department of Respiratory, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Weiming He
- Division of Nephrology, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| |
Collapse
|
13
|
Majewska AM, Dietrich MA, Budzko L, Adamek M, Figlerowicz M, Ciereszko A. Secreted novel AID/APOBEC-like deaminase 1 (SNAD1) - a new important player in fish immunology. Front Immunol 2024; 15:1340273. [PMID: 38601149 PMCID: PMC11004436 DOI: 10.3389/fimmu.2024.1340273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 03/12/2024] [Indexed: 04/12/2024] Open
Abstract
The AID/APOBECs are a group of zinc-dependent cytidine deaminases that catalyse the deamination of bases in nucleic acids, resulting in a cytidine to uridine transition. Secreted novel AID/APOBEC-like deaminases (SNADs), characterized by the presence of a signal peptide are unique among all of intracellular classical AID/APOBECs, which are the central part of antibody diversity and antiviral defense. To date, there is no available knowledge on SNADs including protein characterization, biochemical characteristics and catalytic activity. We used various in silico approaches to define the phylogeny of SNADs, their common structural features, and their potential structural variations in fish species. Our analysis provides strong evidence of the universal presence of SNAD1 proteins/transcripts in fish, in which expression commences after hatching and is highest in anatomical organs linked to the immune system. Moreover, we searched published fish data and identified previously, "uncharacterized proteins" and transcripts as SNAD1 sequences. Our review into immunological research suggests SNAD1 role in immune response to infection or immunization, and interactions with the intestinal microbiota. We also noted SNAD1 association with temperature acclimation, environmental pollution and sex-based expression differences, with females showing higher level. To validate in silico predictions we performed expression studies of several SNAD1 gene variants in carp, which revealed distinct patterns of responses under different conditions. Dual sensitivity to environmental and pathogenic stress highlights its importance in the fish and potentially enhancing thermotolerance and immune defense. Revealing the biological roles of SNADs represents an exciting new area of research related to the role of DNA and/or RNA editing in fish biology.
Collapse
Affiliation(s)
- Anna M. Majewska
- Department of Gamete and Embryo Biology, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Mariola A. Dietrich
- Department of Gamete and Embryo Biology, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Lucyna Budzko
- Department of Molecular and Systems Biology, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznań, Poland
| | - Mikołaj Adamek
- Fish Disease Research Unit, Institute for Parasitology, University of Veterinary Medicine, Hannover, Germany
| | - Marek Figlerowicz
- Department of Molecular and Systems Biology, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznań, Poland
| | - Andrzej Ciereszko
- Department of Gamete and Embryo Biology, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| |
Collapse
|
14
|
Safari MS, Mohabatkar H, Behbahani M. Novel surface biochemical modifications of urinary catheters to prevent catheter-associated urinary tract infections. J Biomed Mater Res B Appl Biomater 2024; 112:e35372. [PMID: 38359168 DOI: 10.1002/jbm.b.35372] [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: 04/09/2023] [Revised: 11/13/2023] [Accepted: 01/02/2024] [Indexed: 02/17/2024]
Abstract
More than 70% of hospital-acquired urinary tract infections are related to urinary catheters, which are commonly used for the treatment of about 20% of hospitalized patients. Urinary catheters are used to drain the bladder if there is an obstruction in the tube that carries urine out of the bladder (urethra). During catheter-associated urinary tract infections, microorganisms rise up in the urinary tract and reach the bladder, and cause infections. Various materials are used to fabricate urinary catheters such as silicone, polyurethane, and latex. These materials allow bacteria and fungi to develop colonies on their inner and outer surfaces, leading to bacteriuria or other infections. Urinary catheters could be modified to exert antibacterial and antifungal effects. Although so many research have been conducted over the past years on the fabrication of antibacterial and antifouling catheters, an ideal catheter needs to be developed for long-term catheterization of more than a month. In this review, we are going to introduce the recent advances in fabricating antibacterial materials to prevent catheter-associated urinary tract infections, such as nanoparticles, antibiotics, chemical compounds, antimicrobial peptides, bacteriophages, and plant extracts.
Collapse
Affiliation(s)
- Mohammad Sadegh Safari
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Hassan Mohabatkar
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Mandana Behbahani
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| |
Collapse
|
15
|
Niu K, Wang H, Kim SK, Wassie T, Wu X. Stepwise co-fermented traditional Chinese medicine byproducts improve antioxidant and anti-inflammatory effects in a piglet model. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:1166-1177. [PMID: 37740928 DOI: 10.1002/jsfa.13002] [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: 03/14/2023] [Revised: 04/26/2023] [Accepted: 09/23/2023] [Indexed: 09/25/2023]
Abstract
BACKGROUND Lianhua Qingwen capsule is a traditional Chinese medicine (TCM) formula having antiviral and anti-inflammatory activities. During capsule production, a large amount of byproducts will be yielded and disposed of as waste by burying. Resourceful utilization of these kinds of TCM byproducts as feed additives through stage-based co-fermentation using enzyme and probiotics could reduce environmental stress and resource shortage. The in vitro characterization and the supplementary effects of fermented TCM byproducts (FTCM) for weaned piglets (initial body weight: 7.23 ± 0.33 kg; dose: basal diet + 300 mg kg-1 FTCM) were investigated. RESULTS Higher reducing sugar content, total flavonoid content, flavonoid compounds (e.g. tectoridin, tricetin, flavone, apigenin, naringenin) and total antioxidant activity were determined in the FTCM compared to spontaneously fermented and unfermented materials. Supplementation of the FTCM to piglets did not significantly affect the feed intake, body weight gain and feed/gain ratio, but significantly decreased a proinflammatory cytokine, IL-8, and increased intestinal total antioxidant activity (TAC) and superoxide dismutase (SOD) activity. Moreover, FTCM supplementation increased α-diversity of the colonic microbiota accompanied with increased abundance of Prevotella genus and Treponema berlinense species. Correlation analysis indicates that T. berlinense is responsible for the decreased IL-8 level and enhanced intestinal TAC and SOD activities which might be mediated by a homoserine lactone molecule (3-oxo-C14). CONCLUSION Overall, the stepwise co-fermentation enriched bioactive compounds within the TCM byproducts and their dietary supplementation did not generate any side effect on growth performance but displayed beneficial effects on enrichment of potential probiotic T. berlinense and relevant functions. © 2023 Society of Chemical Industry.
Collapse
Affiliation(s)
- Kaimin Niu
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
| | - Haoyang Wang
- Tianjin Institute of Industrial Biotechnology, National Technology Innovation Center of Synthetic Biology, Chinese Academy of Sciences, Tianjin, China
- Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry, College of Animal Science and Veterinary Medicine, Tianjin Agricultural University, Tianjin, China
| | - Soo-Ki Kim
- Department of Animal Science and Technology, Konkuk University, Seoul, Republic of Korea
| | - Teketay Wassie
- CAS Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Xin Wu
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
- Tianjin Institute of Industrial Biotechnology, National Technology Innovation Center of Synthetic Biology, Chinese Academy of Sciences, Tianjin, China
- CAS Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| |
Collapse
|
16
|
Zhang L, Wang B, Zhang L, Lian L, Cheng X, Yang Z, Jin Y, Chen J, Ren Z, Qi Y, Chen F, Wu D, Wang L. Responses of Chlorella vulgaris to the native bacteria in real wastewater: Improvement in wastewater treatment and lipid production. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 339:122737. [PMID: 37838313 DOI: 10.1016/j.envpol.2023.122737] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 10/16/2023]
Abstract
Alga-bacterium interaction can improve wastewater treatment efficiency. To unravel the mystery of the interaction between microalgae and bacteria in wastewater, mono-cultures and co-cultures of Chlorella vulgaris and native bacteria in pretreated biochemical wastewater from landfill leachate were investigated. The results showed that the microalgae selected dominant commensal bacteria, creating a further reduction in species richness for the co-culture, which in turn aids in the dominant commensal bacteria's survival, thereby enhancing algal and bacterial metabolic activity. Strikingly, the lipid productivity of Chlorella in co-culture - namely 41.5 mg/L·d - was 1.4 times higher than in algal monoculture. Additionally, pollutant removal was enhanced in co-cultures, attributed to the bacterial community associated with pollutants' degradation. Furthermore, this study provides an important advance towards observations on the migration and transformation pathways of nutrients and metals, and bridges the gap in algal-bacterial synergistic mechanisms in real wastewater, laying the theoretical foundation for improving wastewater treatment.
Collapse
Affiliation(s)
- Lijie Zhang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Bo Wang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Libin Zhang
- School of Civil Engineering, Tianjin University, Tianjin, 300072, China
| | - Lu Lian
- Shandong Institute for Product Quality Inspection, Jinan, 250102, China
| | - Xiaoxiang Cheng
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Zhigang Yang
- Resources and Environment Innovation Institute, Shandong Jianzhu University, Jinan, 250101, China
| | - Yan Jin
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Junren Chen
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Zian Ren
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Yuejun Qi
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Feiyong Chen
- Resources and Environment Innovation Institute, Shandong Jianzhu University, Jinan, 250101, China
| | - Daoji Wu
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China
| | - Lin Wang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250101, China.
| |
Collapse
|
17
|
Su Y, Ding T. Targeting microbial quorum sensing: the next frontier to hinder bacterial driven gastrointestinal infections. Gut Microbes 2023; 15:2252780. [PMID: 37680117 PMCID: PMC10486307 DOI: 10.1080/19490976.2023.2252780] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 09/09/2023] Open
Abstract
Bacteria synchronize social behaviors via a cell-cell communication and interaction mechanism termed as quorum sensing (QS). QS has been extensively studied in monocultures and proved to be intensively involved in bacterial virulence and infection. Despite the role QS plays in pathogens during laboratory engineered infections has been proved, the potential functions of QS related to pathogenesis in context of microbial consortia remain poorly understood. In this review, we summarize the basic molecular mechanisms of QS, primarily focusing on pathogenic microbes driving gastrointestinal (GI) infections. We further discuss how GI pathogens disequilibrate the homeostasis of the indigenous microbial consortia, rebuild a realm dominated by pathogens, and interact with host under worsening infectious conditions via pathogen-biased QS signaling. Additionally, we present recent applications and main challenges of manipulating QS network in microbial consortia with the goal of better understanding GI bacterial sociality and facilitating novel therapies targeting bacterial infections.
Collapse
Affiliation(s)
- Ying Su
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
- Ministry of Education, Key Laboratory of Tropical Diseases Control (Sun Yat-Sen University), Guangzhou, China
| | - Tao Ding
- Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
- Ministry of Education, Key Laboratory of Tropical Diseases Control (Sun Yat-Sen University), Guangzhou, China
| |
Collapse
|
18
|
Schmidt AK, Schwartzkopf CM, Pourtois JD, Burgener E, Faith DR, Joyce A, Lamma T, Kumar G, Bollyky PL, Secor PR. Targeted deletion of Pf prophages from diverse Pseudomonas aeruginosa isolates impacts quorum sensing and virulence traits. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.19.567716. [PMID: 38014273 PMCID: PMC10680813 DOI: 10.1101/2023.11.19.567716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Pseudomonas aeruginosa is an opportunistic bacterial pathogen that commonly causes medical hardware, wound, and respiratory infections. Temperate filamentous Pf phages that infect P. aeruginosa impact numerous bacterial virulence phenotypes. Most work on Pf phages has focused on strain Pf4 and its host P. aeruginosa PAO1. Expanding from Pf4 and PAO1, this study explores diverse Pf strains infecting P. aeruginosa clinical isolates. We describe a simple technique targeting the Pf lysogeny maintenance gene, pflM (PA0718), that enables the effective elimination of Pf prophages from diverse P. aeruginosa hosts. This study also assesses the effects different Pf phages have on host quorum sensing, biofilm formation, virulence factor production, and virulence. Collectively, this research not only introduces a valuable tool for Pf prophage elimination from diverse P. aeruginosa isolates, but also advances our understanding of the complex relationship between P. aeruginosa and filamentous Pf phages.
Collapse
Affiliation(s)
- Amelia K. Schmidt
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | | | - Julie D. Pourtois
- Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Elizabeth Burgener
- Department of Pediatrics, Division of Pulmonology, Children’s Hospital of Los Angeles, University of Southern California, Los Angeles, CA, USA
| | - Dominick R. Faith
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Alex Joyce
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Tyrza Lamma
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| | - Geetha Kumar
- School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri, Kerala, India
| | - Paul L. Bollyky
- Division of Infectious Diseases and Geographic Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Patrick R. Secor
- Division of Biological Sciences, University of Montana, Missoula, Montana, USA
| |
Collapse
|
19
|
Hou JJ, Ma AH, Qin YH. Activation of the aryl hydrocarbon receptor in inflammatory bowel disease: insights from gut microbiota. Front Cell Infect Microbiol 2023; 13:1279172. [PMID: 37942478 PMCID: PMC10628454 DOI: 10.3389/fcimb.2023.1279172] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 10/09/2023] [Indexed: 11/10/2023] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic inflammatory intestinal disease that affects more than 3.5 million people, with rising prevalence. It deeply affects patients' daily life, increasing the burden on patients, families, and society. Presently, the etiology of IBD remains incompletely clarified, while emerging evidence has demonstrated that altered gut microbiota and decreased aryl hydrocarbon receptor (AHR) activity are closely associated with IBD. Furthermore, microbial metabolites are capable of AHR activation as AHR ligands, while the AHR, in turn, affects the microbiota through various pathways. In light of the complex connection among gut microbiota, the AHR, and IBD, it is urgent to review the latest research progress in this field. In this review, we describe the role of gut microbiota and AHR activation in IBD and discussed the crosstalk between gut microbiota and the AHR in the context of IBD. Taken as a whole, we propose new therapeutic strategies targeting the AHR-microbiota axis for IBD, even for other related diseases caused by AHR-microbiota dysbiosis.
Collapse
Affiliation(s)
| | | | - Yue-Hua Qin
- Department of Gastroenterology, Shaoxing People’s Hospital, Shaoxing, China
| |
Collapse
|
20
|
Luscombe VB, Baena-López LA, Bataille CJR, Russell AJ, Greaves DR. Kinetic insights into agonist-dependent signalling bias at the pro-inflammatory G-protein coupled receptor GPR84. Eur J Pharmacol 2023; 956:175960. [PMID: 37543157 PMCID: PMC10804997 DOI: 10.1016/j.ejphar.2023.175960] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/07/2023]
Abstract
GPR84 is an orphan G-protein coupled receptor (GPCR) linked to inflammation. Strategies targeting GPR84 to prevent excessive inflammation in disease are hampered by a lack of understanding of its precise functional role. We have developed heterologous cell lines with low GPR84 expression levels that phenocopy the response of primary cells in a label-free cell electrical impedance (CEI) sensing system that measures cell morphology and adhesion. We then investigated the signalling profile and membrane localisation of GPR84 upon treatment with 6-OAU and DL-175, two agonists known to differentially influence immune cell function. When compared to 6-OAU, DL-175 was found to exhibit a delayed impedance response, a delayed and suppressed activation of Akt, which together correlated with an impaired ability to internalise GPR84 from the plasma membrane. The signalling differences were transient and occurred only at early time points in the low expressing cell lines, highlighting the importance of receptor number and kinetic readouts when evaluating signalling bias. Our findings open new ways to understand GPR84 signalling and evaluate the effect of newly developed agonists.
Collapse
Affiliation(s)
- Vincent B Luscombe
- Sir William Dunn School of Pathology, South Parks Rd, University of Oxford, Oxford, Oxfordshire, OX1 3RE, United Kingdom
| | - Luis Alberto Baena-López
- Sir William Dunn School of Pathology, South Parks Rd, University of Oxford, Oxford, Oxfordshire, OX1 3RE, United Kingdom
| | - Carole J R Bataille
- Department of Chemistry, Mansfield Rd, University of Oxford, Oxford, Oxfordshire, OX1 3TA, United Kingdom
| | - Angela J Russell
- Department of Chemistry, Mansfield Rd, University of Oxford, Oxford, Oxfordshire, OX1 3TA, United Kingdom; Department of Pharmacology, Mansfield Rd, University of Oxford, Oxford, Oxfordshire, OX1 3TA, United Kingdom
| | - David R Greaves
- Sir William Dunn School of Pathology, South Parks Rd, University of Oxford, Oxford, Oxfordshire, OX1 3RE, United Kingdom.
| |
Collapse
|
21
|
Grandy S, Scur M, Dolan K, Nickerson R, Cheng Z. Using model systems to unravel host-Pseudomonas aeruginosa interactions. Environ Microbiol 2023; 25:1765-1784. [PMID: 37290773 DOI: 10.1111/1462-2920.16440] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/29/2023] [Indexed: 06/10/2023]
Abstract
Using model systems in infection biology has led to the discoveries of many pathogen-encoded virulence factors and critical host immune factors to fight pathogenic infections. Studies of the remarkable Pseudomonas aeruginosa bacterium that infects and causes disease in hosts as divergent as humans and plants afford unique opportunities to shed new light on virulence strategies and host defence mechanisms. One of the rationales for using model systems as a discovery tool to characterise bacterial factors driving human infection outcomes is that many P. aeruginosa virulence factors are required for pathogenesis in diverse different hosts. On the other side, many host signalling components, such as the evolutionarily conserved mitogen-activated protein kinases, are involved in immune signalling in a diverse range of hosts. Some model organisms that have less complex immune systems also allow dissection of the direct impacts of innate immunity on host defence without the interference of adaptive immunity. In this review, we start with discussing the occurrence of P. aeruginosa in the environment and the ability of this bacterium to cause disease in various hosts as a natural opportunistic pathogen. We then summarise the use of some model systems to study host defence and P. aeruginosa virulence.
Collapse
Affiliation(s)
- Shannen Grandy
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Michal Scur
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Kathleen Dolan
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Rhea Nickerson
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Zhenyu Cheng
- Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| |
Collapse
|
22
|
Priya PS, Boopathi S, Murugan R, Haridevamuthu B, Arshad A, Arockiaraj J. Quorum sensing signals: Aquaculture risk factor. REVIEWS IN AQUACULTURE 2023; 15:1294-1310. [DOI: 10.1111/raq.12774] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 11/28/2022] [Indexed: 10/16/2023]
Abstract
AbstractBacteria produce several virulence factors and cause massive mortality in fish and crustaceans. Abundant quorum sensing (QS) signals and high cell density are essentially required for the production of such virulence factors. Although several strategies have been developed to control aquatic pathogens through antibiotics and QS inhibition, the impact of pre‐existing QS signals in the aquatic environment has been overlooked. QS signals cause detrimental effects on mammalian cells and induce cell death by interfering with multiple cellular pathways. Moreover, QS signals not only function as a messenger, but also annihilate the functions of the host immune system which implies that QS signals should be designated as a major virulence factor. Despite QS signals' role has been well documented in mammalian cells, their impact on aquatic organisms is still at the budding stage. However, many aquatic organisms produce enzymes that degrade and detoxify such QS signals. In addition, physical and chemical factors also determine the stability of the QS signals in the aqueous environment. The balance between QS signals and existing QS signals degrading factors essentially determines the disease progression in aquatic organisms. In this review, we highlight the impact of QS signals on aquatic organisms and further discussed potential alternative strategies to control disease progression.
Collapse
Affiliation(s)
- P. Snega Priya
- Department of Biotechnology, College of Science and Humanities SRM Institute of Science and Technology Chennai India
| | - Seenivasan Boopathi
- Department of Biotechnology, College of Science and Humanities SRM Institute of Science and Technology Chennai India
| | - Raghul Murugan
- Department of Biotechnology, College of Science and Humanities SRM Institute of Science and Technology Chennai India
| | - B. Haridevamuthu
- Department of Biotechnology, College of Science and Humanities SRM Institute of Science and Technology Chennai India
| | - Aziz Arshad
- International Institute of Aquaculture and Aquatic Sciences (I‐AQUAS) Universiti Putra Malaysia Negeri Sembilan Malaysia
| | - Jesu Arockiaraj
- Department of Biotechnology, College of Science and Humanities SRM Institute of Science and Technology Chennai India
| |
Collapse
|
23
|
Sládeková L, Mani S, Dvořák Z. Ligands and agonists of the aryl hydrocarbon receptor AhR: Facts and myths. Biochem Pharmacol 2023; 213:115626. [PMID: 37247746 DOI: 10.1016/j.bcp.2023.115626] [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: 04/21/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 05/31/2023]
Abstract
The aryl hydrocarbon receptor (AhR) belongs to the essential helix-loop-helix transcription factors family. This receptor has a central role in determining host physiology and a variety of pathophysiologies ranging from inflammation and metabolism to cancer. AhR is a ligand-driven receptor with intricate pharmacology of activation depending on the type and quantity of ligand present. Therefore, a better understanding of AhR ligands per se is critical to move the field forward. In this minireview, we clarify some facts and myths about AhR ligands and how further studies could shed light on the true nature of AhR activation by these ligands. The review covers select chemical classes and explores parameters that qualify them as true receptor ligands.
Collapse
Affiliation(s)
- Lucia Sládeková
- Department of Cell Biology and Genetics, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
| | - Sridhar Mani
- Department of Genetics and Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Zdeněk Dvořák
- Department of Cell Biology and Genetics, Faculty of Science, Palacký University, Šlechtitelů 27, 783 71 Olomouc, Czech Republic.
| |
Collapse
|
24
|
Zaman N, Azam SS. Discrete Dynamics of Warhead Modulation on Covalent Inhibition of Oxyr: A QM/MM Study. J Phys Chem B 2023. [PMID: 37377002 DOI: 10.1021/acs.jpcb.2c07376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
The bacterial transcriptional factor OxyR, a peroxide sensor conserved in bacterial virulence pathways, has the capability to exhibit exceptional reactivity toward hydrogen peroxide (H2O2). H2O2 is essential for oxidizing cysteine thiolates to maintain cellular redox homeostasis and is dispensable for bacterial growth that can potentially mitigate drug resistance, thus underlining OxyR as a valuable target. We employ quantum mechanics/molecular mechanics (QM/MM) umbrella sampling (US) simulations at the DFTB3/MM level of theory and propose a reaction mechanism with four potential covalent inhibitors. The potential of mean force reveals the direct role of intrinsic reactivity of inhibitors, for instance, benzothiophenes and modified experimental inhibitors with methyl oxo-enoate warhead-activated carbonyl samples in the first step of reaction, which shed light on the significance of proton transfer indispensable for full inhibition, whereas the nitrile inhibitor undergoes a stepwise mechanism with a small proton-transfer energy barrier and lower imaginary frequencies that materialize instantly after nucleophilic attack. To unveil the molecular determinants of respective binding affinities, transition states along the reaction path are optimized and characterized with B3LYP 6-31+G(d,p). Furthermore, the post-simulation analysis indicates the catalytic triad (His130/Cys199/Thr129), thermodynamically favored for inhibition, which restricts water molecules from acting as the potential source of protonation/deprotonation. This study thus serves as a preamble to add variation in the proposed structures and unveils the impact of functional groups lying in warheads that modulate the kinetics of proton transfer, which will certainly aid to design more selective and efficient irreversible inhibitors of OxyR.
Collapse
Affiliation(s)
- Naila Zaman
- Computational Biology Lab, National Center for Bioinformatics, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Syed Sikander Azam
- Computational Biology Lab, National Center for Bioinformatics, Quaid-i-Azam University, Islamabad 45320, Pakistan
| |
Collapse
|
25
|
Walter Bock K. Aryl hydrocarbon receptor (AHR): towards understanding intestinal microbial ligands including vitamin B12 and folic acid as natural antagonists. Biochem Pharmacol 2023:115658. [PMID: 37336251 DOI: 10.1016/j.bcp.2023.115658] [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: 04/17/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/21/2023]
Abstract
AHR has been identified as ligand-modulated transcription factor and environmental sensor. However, explanation of its multiple agonistic and antagonistic ligands is far from complete. Studies of AHR's role in host-microbiome interaction are currently a fruitful area of research. Microbial products and virulence factors have been identified as AHR agonists. In steady state they are involved in safeguarding intestinal barrier integrity. When virulence factors from pathogenic bacteria are identified by AHR of intestinal immune cells, anti-microbial defense mechanisms are activated by generating reactive oxygen species (ROS) in intestinal epithelial cells and recruited immune cells. ROS production has to be strictly controlled, and anti-inflammatory responses have to be initiated timely in the resolution phase of inflammation to avoid tissue damage and chronic inflammatory responses. Surprisingly, bacteria-generated vitamin B12/cobalamin and vitamin B9/folic acid have been identified as natural AHR antagonists, stimulating the interest of biochemists. Hints for AHR-cobalamin antagonism are pointing to cobalamin-dependent enzymes leading to alterations of TCA cycle intermediates, and TCDD-mediated loss of serum cobalamin. Although we are still at the beginning to understand mechanisms, it is likely that scientific efforts are on a rewarding path to understand novel AHR functions.
Collapse
Affiliation(s)
- Karl Walter Bock
- Institute of Experimental and Clinical Pharmacology, Wilhelmstrasse 56, D-72074 Tübingen, Germany.
| |
Collapse
|
26
|
Chen Y, Wang Y, Fu Y, Yin Y, Xu K. Modulating AHR function offers exciting therapeutic potential in gut immunity and inflammation. Cell Biosci 2023; 13:85. [PMID: 37179416 PMCID: PMC10182712 DOI: 10.1186/s13578-023-01046-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor. 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is a classical exogenous synthetic ligand of AHR that has significant immunotoxic effects. Activation of AHR has beneficial effects on intestinal immune responses, but inactivation or overactivation of AHR can lead to intestinal immune dysregulation and even intestinal diseases. Sustained potent activation of AHR by TCDD results in impairment of the intestinal epithelial barrier. However, currently, AHR research has been more focused on elucidating physiologic AHR function than on dioxin toxicity. The appropriate level of AHR activation plays a role in maintaining gut health and protecting against intestinal inflammation. Therefore, AHR offers a crucial target to modulate intestinal immunity and inflammation. Herein, we summarize our current understanding of the relationship between AHR and intestinal immunity, the ways in which AHR affects intestinal immunity and inflammation, the effects of AHR activity on intestinal immunity and inflammation, and the effect of dietary habits on intestinal health through AHR. Finally, we discuss the therapeutic role of AHR in maintaining gut homeostasis and relieving inflammation.
Collapse
Affiliation(s)
- Yue Chen
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450000, China
| | - Yadong Wang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
| | - Yawei Fu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450000, China
| | - Yulong Yin
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450000, China
| | - Kang Xu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
| |
Collapse
|
27
|
Pinto CJG, Ávila-Gálvez MÁ, Lian Y, Moura-Alves P, Nunes Dos Santos C. Targeting the aryl hydrocarbon receptor by gut phenolic metabolites: A strategy towards gut inflammation. Redox Biol 2023; 61:102622. [PMID: 36812782 PMCID: PMC9958510 DOI: 10.1016/j.redox.2023.102622] [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] [Received: 12/03/2022] [Revised: 01/25/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
The Aryl Hydrocarbon Receptor (AHR) is a ligand-dependent transcription factor able to control complex transcriptional processes in several cell types, which has been correlated with various diseases, including inflammatory bowel diseases (IBD). Numerous studies have described different compounds as ligands of this receptor, like xenobiotics, natural compounds, and several host-derived metabolites. Dietary (poly)phenols have been studied regarding their pleiotropic activities (e.g., neuroprotective and anti-inflammatory), but their AHR modulatory capabilities have also been considered. However, dietary (poly)phenols are submitted to extensive metabolism in the gut (e.g., gut microbiota). Thus, the resulting gut phenolic metabolites could be key players modulating AHR since they are the ones that reach the cells and may exert effects on the AHR throughout the gut and other organs. This review aims at a comprehensive search for the most abundant gut phenolic metabolites detected and quantified in humans to understand how many have been described as AHR modulators and what could be their impact on inflammatory gut processes. Even though several phenolic compounds have been studied regarding their anti-inflammatory capacities, only 1 gut phenolic metabolite, described as AHR modulator, has been evaluated on intestinal inflammatory models. Searching for AHR ligands could be a novel strategy against IBD.
Collapse
Affiliation(s)
- Catarina J G Pinto
- iNOVA4Health, NOVA Medical School
- Faculdade de Ciências Médicas, NMS
- FCM, Universidade Nova de Lisboa, Lisboa, Portugal; IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal; I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal
| | - María Ángeles Ávila-Gálvez
- iNOVA4Health, NOVA Medical School
- Faculdade de Ciências Médicas, NMS
- FCM, Universidade Nova de Lisboa, Lisboa, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, Oeiras, Portugal
| | - Yilong Lian
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, OX3 7DQ, Oxford, United Kingdom
| | - Pedro Moura-Alves
- IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal; I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal; Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, OX3 7DQ, Oxford, United Kingdom.
| | - Cláudia Nunes Dos Santos
- iNOVA4Health, NOVA Medical School
- Faculdade de Ciências Médicas, NMS
- FCM, Universidade Nova de Lisboa, Lisboa, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Apartado 12, Oeiras, Portugal.
| |
Collapse
|
28
|
Oliveira RA, Cabral V, Torcato I, Xavier KB. Deciphering the quorum-sensing lexicon of the gut microbiota. Cell Host Microbe 2023; 31:500-512. [PMID: 37054672 DOI: 10.1016/j.chom.2023.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
The enduring coexistence between the gut microbiota and the host has led to a symbiotic relationship that benefits both parties. In this complex, multispecies environment, bacteria can communicate through chemical molecules to sense and respond to the chemical, physical, and ecological properties of the surrounding environment. One of the best-studied cell-to-cell communication mechanisms is quorum sensing. Chemical signaling through quorum sensing is involved in regulating the bacterial group behaviors, often required for host colonization. However, most microbial-host interactions regulated by quorum sensing are studied in pathogens. Here, we will focus on the latest reports on the emerging studies of quorum sensing in the gut microbiota symbionts and on group behaviors adopted by these bacteria to colonize the mammalian gut. Moreover, we address the challenges and approaches to uncover molecule-mediated communication mechanisms, which will allow us to unravel the processes that drive the establishment of gut microbiota.
Collapse
Affiliation(s)
| | - Vitor Cabral
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal
| | - Inês Torcato
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal
| | | |
Collapse
|
29
|
Rua R, Pujol N. Pathogen metabolite checkpoint: NHR on guard. Immunity 2023; 56:744-746. [PMID: 37044064 DOI: 10.1016/j.immuni.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
How can beneficial microorganisms be distinguished from pathogenic ones? In this issue of Immunity, Peterson et al. discovered that a specific phenazine, which is part of a family of toxic metabolites expressed by pathogenic bacteria, is detected by Caenorhabditis elegans by directly binding to a nuclear hormone receptor, promoting the expression of detoxifying enzymes and immunity-related genes, thus protecting the worm.
Collapse
Affiliation(s)
- Rejane Rua
- Aix-Marseille University, CNRS, INSERM, Centre d'Immunologie de Marseille-Luminy (CIML), Turing Centre for Living Systems, Marseille, France.
| | - Nathalie Pujol
- Aix-Marseille University, CNRS, INSERM, Centre d'Immunologie de Marseille-Luminy (CIML), Turing Centre for Living Systems, Marseille, France.
| |
Collapse
|
30
|
Peterson ND, Tse SY, Huang QJ, Wani KA, Schiffer CA, Pukkila-Worley R. Non-canonical pattern recognition of a pathogen-derived metabolite by a nuclear hormone receptor identifies virulent bacteria in C. elegans. Immunity 2023; 56:768-782.e9. [PMID: 36804958 PMCID: PMC10101930 DOI: 10.1016/j.immuni.2023.01.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/27/2022] [Accepted: 01/25/2023] [Indexed: 02/19/2023]
Abstract
Distinguishing infectious pathogens from harmless microorganisms is essential for animal health. The mechanisms used to identify infectious microbes are not fully understood, particularly in metazoan hosts that eat bacteria as their food source. Here, we characterized a non-canonical pattern-recognition system in Caenorhabditis elegans (C. elegans) that assesses the relative threat of virulent Pseudomonas aeruginosa (P. aeruginosa) to activate innate immunity. We discovered that the innate immune response in C. elegans was triggered by phenazine-1-carboxamide (PCN), a toxic metabolite produced by pathogenic strains of P. aeruginosa. We identified the nuclear hormone receptor NHR-86/HNF4 as the PCN sensor in C. elegans and validated that PCN bound to the ligand-binding domain of NHR-86/HNF4. Activation of NHR-86/HNF4 by PCN directly engaged a transcriptional program in intestinal epithelial cells that protected against P. aeruginosa. Thus, a bacterial metabolite is a pattern of pathogenesis surveilled by nematodes to identify a pathogen in its bacterial diet.
Collapse
Affiliation(s)
- Nicholas D Peterson
- Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Samantha Y Tse
- Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Qiuyu Judy Huang
- Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Khursheed A Wani
- Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Celia A Schiffer
- Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Read Pukkila-Worley
- Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA.
| |
Collapse
|
31
|
Zhu Y, Chang D. Interactions between the lung microbiome and host immunity in chronic obstructive pulmonary disease. Chronic Dis Transl Med 2023. [DOI: 10.1002/cdt3.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023] Open
Affiliation(s)
- Yixing Zhu
- Graduate School of The PLA General Hospital Beijing China
| | - De Chang
- Department of Respiratory and Critical Care Medicine, Eighth Medical Center, Department of Respiratory and Critical Care Seventh Medical Center Chinese PLA General Hospital Beijing China
| |
Collapse
|
32
|
Markus V, Paul AA, Teralı K, Özer N, Marks RS, Golberg K, Kushmaro A. Conversations in the Gut: The Role of Quorum Sensing in Normobiosis. Int J Mol Sci 2023; 24:ijms24043722. [PMID: 36835135 PMCID: PMC9963693 DOI: 10.3390/ijms24043722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/03/2023] [Accepted: 02/11/2023] [Indexed: 02/15/2023] Open
Abstract
An imbalance in gut microbiota, termed dysbiosis, has been shown to affect host health. Several factors, including dietary changes, have been reported to cause dysbiosis with its associated pathologies that include inflammatory bowel disease, cancer, obesity, depression, and autism. We recently demonstrated the inhibitory effects of artificial sweeteners on bacterial quorum sensing (QS) and proposed that QS inhibition may be one mechanism behind such dysbiosis. QS is a complex network of cell-cell communication that is mediated by small diffusible molecules known as autoinducers (AIs). Using AIs, bacteria interact with one another and coordinate their gene expression based on their population density for the benefit of the whole community or one group over another. Bacteria that cannot synthesize their own AIs secretly "listen" to the signals produced by other bacteria, a phenomenon known as "eavesdropping". AIs impact gut microbiota equilibrium by mediating intra- and interspecies interactions as well as interkingdom communication. In this review, we discuss the role of QS in normobiosis (the normal balance of bacteria in the gut) and how interference in QS causes gut microbial imbalance. First, we present a review of QS discovery and then highlight the various QS signaling molecules used by bacteria in the gut. We also explore strategies that promote gut bacterial activity via QS activation and provide prospects for the future.
Collapse
Affiliation(s)
- Victor Markus
- Department of Medical Biochemistry, Faculty of Medicine, Near East University, Nicosia 99138, Cyprus
| | - Abraham Abbey Paul
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
| | - Kerem Teralı
- Department of Medical Biochemistry, Faculty of Medicine, Cyprus International University, Nicosia 99258, Cyprus
| | - Nazmi Özer
- Department of Biochemistry, Faculty of Pharmacy, Girne American University, Kyrenia 99428, Cyprus
| | - Robert S. Marks
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
- The Ilse Katz Center for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
| | - Karina Golberg
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
- Correspondence: (K.G.); (A.K.); Tel.: +972-74-7795293 (K.G.); +972-747795291 (A.K.)
| | - Ariel Kushmaro
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
- The Ilse Katz Center for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
- School of Sustainability and Climate Change, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel
- Correspondence: (K.G.); (A.K.); Tel.: +972-74-7795293 (K.G.); +972-747795291 (A.K.)
| |
Collapse
|
33
|
Shi Y, Cao Q, Sun J, Hu X, Su Z, Xu Y, Zhang H, Lan L, Feng Y. The opportunistic pathogen Pseudomonas aeruginosa exploits bacterial biotin synthesis pathway to benefit its infectivity. PLoS Pathog 2023; 19:e1011110. [PMID: 36689471 PMCID: PMC9894557 DOI: 10.1371/journal.ppat.1011110] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 02/02/2023] [Accepted: 01/09/2023] [Indexed: 01/24/2023] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that predominantly causes nosocomial and community-acquired lung infections. As a member of ESKAPE pathogens, carbapenem-resistant P. aeruginosa (CRPA) compromises the limited therapeutic options, raising an urgent demand for the development of lead compounds against previously-unrecognized drug targets. Biotin is an important cofactor, of which the de novo synthesis is an attractive antimicrobial target in certain recalcitrant infections. Here we report genetic and biochemical definition of P. aeruginosa BioH (PA0502) that functions as a gatekeeper enzyme allowing the product pimeloyl-ACP to exit from fatty acid synthesis cycle and to enter the late stage of biotin synthesis pathway. In relative to Escherichia coli, P. aeruginosa physiologically requires 3-fold higher level of cytosolic biotin, which can be attributed to the occurrence of multiple biotinylated enzymes. The BioH protein enables the in vitro reconstitution of biotin synthesis. The repertoire of biotin abundance is assigned to different mouse tissues and/or organ contents, and the plasma biotin level of mouse is around 6-fold higher than that of human. Removal of bioH renders P. aeruginosa biotin auxotrophic and impairs its intra-phagosome persistence. Based on a model of CD-1 mice mimicking the human environment, lung challenge combined with systemic infection suggested that BioH is necessary for the full virulence of P. aeruginosa. As expected, the biotin synthesis inhibitor MAC13772 is capable of dampening the viability of CRPA. Notably, MAC13772 interferes the production of pyocyanin, an important virulence factor of P. aeruginosa. Our data expands our understanding of P. aeruginosa biotin synthesis relevant to bacterial infectivity. In particular, this study represents the first example of an extracellular pathogen P. aeruginosa that exploits biotin cofactor as a fitness determinant, raising the possibility of biotin synthesis as an anti-CRPA target.
Collapse
Affiliation(s)
- Yu Shi
- Department of Microbiology, and Department of General Intensive Care Unit of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Qin Cao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, Zhejiang, China
| | - Jingdu Sun
- Department of Microbiology, and Department of General Intensive Care Unit of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaofang Hu
- Fuzhou Medical College of Nanchang University, Fuzhou, Jiangxi, China
| | - Zhi Su
- Department of Microbiology, and Department of General Intensive Care Unit of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Yongchang Xu
- Department of Microbiology, and Department of General Intensive Care Unit of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Huimin Zhang
- Cancer Center at Illinois, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Lefu Lan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, Zhejiang, China
- * E-mail: (LL); (YF)
| | - Youjun Feng
- Department of Microbiology, and Department of General Intensive Care Unit of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
- * E-mail: (LL); (YF)
| |
Collapse
|
34
|
Juhas M. Communication Between Microorganisms. BRIEF LESSONS IN MICROBIOLOGY 2023:27-41. [DOI: 10.1007/978-3-031-29544-7_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
35
|
Laganenka L, Sourjik V. Bacterial Quorum Sensing Signals at the Interdomain Interface. Isr J Chem 2022. [DOI: 10.1002/ijch.202200080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | - Victor Sourjik
- Max Planck Institute for Terrestrial Microbiology and Center for Synthetic Microbiology (SYNMIKRO) Marburg Germany
| |
Collapse
|
36
|
Flegel J, Shaaban S, Jia ZJ, Schulte B, Lian Y, Krzyzanowski A, Metz M, Schneidewind T, Wesseler F, Flegel A, Reich A, Brause A, Xue G, Zhang M, Dötsch L, Stender ID, Hoffmann JE, Scheel R, Janning P, Rastinejad F, Schade D, Strohmann C, Antonchick AP, Sievers S, Moura-Alves P, Ziegler S, Waldmann H. The Highly Potent AhR Agonist Picoberin Modulates Hh-Dependent Osteoblast Differentiation. J Med Chem 2022; 65:16268-16289. [PMID: 36459434 PMCID: PMC9791665 DOI: 10.1021/acs.jmedchem.2c00956] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Identification and analysis of small molecule bioactivity in target-agnostic cellular assays and monitoring changes in phenotype followed by identification of the biological target are a powerful approach for the identification of novel bioactive chemical matter in particular when the monitored phenotype is disease-related and physiologically relevant. Profiling methods that enable the unbiased analysis of compound-perturbed states can suggest mechanisms of action or even targets for bioactive small molecules and may yield novel insights into biology. Here we report the enantioselective synthesis of natural-product-inspired 8-oxotetrahydroprotoberberines and the identification of Picoberin, a low picomolar inhibitor of Hedgehog (Hh)-induced osteoblast differentiation. Global transcriptome and proteome profiling revealed the aryl hydrocarbon receptor (AhR) as the molecular target of this compound and identified a cross talk between Hh and AhR signaling during osteoblast differentiation.
Collapse
Affiliation(s)
- Jana Flegel
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| | - Saad Shaaban
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Institute of Organic Chemistry, University of Vienna Währinger Str. 38, Vienna 1090, Austria
| | - Zhi Jun Jia
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Key Laboratory of Birth Defects and Related Diseases of Women and Children, Evidence-Based Pharmacy Center, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Britta Schulte
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| | - Yilong Lian
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Adrian Krzyzanowski
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| | - Malte Metz
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Tabea Schneidewind
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| | - Fabian Wesseler
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| | - Anke Flegel
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Alisa Reich
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Alexandra Brause
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Gang Xue
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Minghao Zhang
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, OX3 7FZ, UK
| | - Lara Dötsch
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| | - Isabelle D Stender
- Protein Chemistry Facility, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Jan-Erik Hoffmann
- Protein Chemistry Facility, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Rebecca Scheel
- Faculty of Chemistry, Inorganic Chemistry, Technical University Dortmund, Dortmund 44227, Germany
| | - Petra Janning
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Fraydoon Rastinejad
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, OX3 7FZ, UK
| | - Dennis Schade
- Dept. of Pharmaceutical & Medicinal Chemistry, Institute of Pharmacy, Christian-Albrechts-University of Kiel, Kiel 24118, Germany
| | - Carsten Strohmann
- Faculty of Chemistry, Inorganic Chemistry, Technical University Dortmund, Dortmund 44227, Germany
| | - Andrey P Antonchick
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany.,Department of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, United Kingdom
| | - Sonja Sievers
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Compound Management and Screening Center, Dortmund 44227, Germany
| | - Pedro Moura-Alves
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom.,i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal.,IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal
| | - Slava Ziegler
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany
| | - Herbert Waldmann
- Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund 44227, Germany.,Faculty of Chemistry, Chemical Biology, Technical University Dortmund, Dortmund 44227, Germany
| |
Collapse
|
37
|
Effects of Rhapontigenin as a Novel Quorum-Sensing Inhibitor on Exoenzymes and Biofilm Formation of Pectobacterium carotovorum subsp. carotovorum and Its Application in Vegetables. Molecules 2022; 27:molecules27248878. [PMID: 36558013 PMCID: PMC9788590 DOI: 10.3390/molecules27248878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022] Open
Abstract
The aim of this study was to devise a method to protect Chinese cabbage (Brassica chinensis) and lettuce (Lactuca sativa) from bacterial-disease-induced damage during storage. Thus, the potential of rhapontigenin as a quorum sensing (QS) inhibitor against Pectobacterium carotovorum subsp. carotovorum (P. carotovorum) was evaluated. The QS inhibitory effects of rhapontigenin were confirmed by significant inhibition of the production of violacein in Chromobacterium violaceum CV026 (C. violaceum, CV026). The inhibitory effects of rhapontigenin on the motility, exopolysaccharide (EPS) production, biofilm formation and virulence−exoenzyme synthesis of P. carotovorum were investigated. Acyl-homoserine lactones (AHLs) were quantified using liquid chromatography−mass spectrometry (LC−MS). The inhibitory effects of rhapontigenin on the development of biofilms were observed using fluorescence microscopy and scanning electron microscopy (SEM). A direct-inoculation assay was performed to investigate the QS inhibitory effects of rhapontigenin on P. carotovorum in Chinese cabbage and lettuce. Our results demonstrated that rhapontigenin exhibited significant inhibition (p < 0.05) of the motility, EPS production, biofilm formation, virulence−exoenzyme synthesis and AHL production of P. carotovorum. Additionally, the result of the direct-inoculation assay revealed that rhapontigenin might provide vegetables with significant shelf-life extension and prevent quality loss by controlling the spread of soft-rot symptoms. Consequently, the study provided a significant insight into the potential of rhapontigenin as a QS inhibitor against P. carotovorum.
Collapse
|
38
|
Forde B, Yao L, Shaha R, Murphy S, Lunjani N, O'Mahony L. Immunomodulation by foods and microbes: Unravelling the molecular tango. Allergy 2022; 77:3513-3526. [PMID: 35892227 PMCID: PMC10087875 DOI: 10.1111/all.15455] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/15/2022] [Accepted: 07/23/2022] [Indexed: 01/28/2023]
Abstract
Metabolic health and immune function are intimately connected via diet and the microbiota. Nearly 90% of all immune cells in the body are associated with the gastrointestinal tract and these immune cells are continuously exposed to a wide range of microbes and microbial-derived compounds, with important systemic ramifications. Microbial dysbiosis has consistently been observed in patients with atopic dermatitis, food allergy and asthma and the molecular mechanisms linking changes in microbial populations with disease risk and disease endotypes are being intensively investigated. The discovery of novel bacterial metabolites that impact immune function is at the forefront of host-microbe research. Co-evolution of microbial communities within their hosts has resulted in intertwined metabolic pathways that affect physiological and pathological processes. However, recent dietary and lifestyle changes are thought to negatively influence interactions between microbes and their host. This review provides an overview of some of the critical metabolite-receptor interactions that have been recently described, which may underpin the immunomodulatory effects of the microbiota, and are of relevance for allergy, asthma and infectious diseases.
Collapse
Affiliation(s)
- Brian Forde
- APC Microbiome Ireland, UCC, Cork, Ireland.,School of Microbiology, UCC, Cork, Ireland
| | - Lu Yao
- APC Microbiome Ireland, UCC, Cork, Ireland.,School of Microbiology, UCC, Cork, Ireland
| | - Rupin Shaha
- APC Microbiome Ireland, UCC, Cork, Ireland.,School of Microbiology, UCC, Cork, Ireland
| | | | - Nonhlanhla Lunjani
- APC Microbiome Ireland, UCC, Cork, Ireland.,University of Cape Town, Cape Town, South Africa
| | - Liam O'Mahony
- APC Microbiome Ireland, UCC, Cork, Ireland.,School of Microbiology, UCC, Cork, Ireland.,Department of Medicine, UCC, Cork, Ireland
| |
Collapse
|
39
|
Kasthuri T, Barath S, Nandhakumar M, Karutha Pandian S. Proteomic profiling spotlights the molecular targets and the impact of the natural antivirulent umbelliferone on stress response, virulence factors, and the quorum sensing network of Pseudomonas aeruginosa. Front Cell Infect Microbiol 2022; 12:998540. [PMID: 36530435 PMCID: PMC9748083 DOI: 10.3389/fcimb.2022.998540] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/18/2022] [Indexed: 12/05/2022] Open
Abstract
Pseudomonas aeruginosa easily adapts to newer environments and acquires several genome flexibilities to overcome the effect of antibiotics during therapeutics, especially in cystic fibrosis patients. During adaptation to the host system, the bacteria employ various tactics including virulence factor production and biofilm formation to escape from the host immune system and resist antibiotics. Hence, identifying alternative strategies to combat recalcitrant pathogens is imperative for the successful elimination of drug-resistant microbes. In this context, this study portrays the anti-virulence efficacy of umbelliferone (UMB) against P. aeruginosa. UMB (7-hydroxy coumarin) is pervasively found among the plant family of Umbelliferae and Asteraceae. The UMB impeded biofilm formation in the P. aeruginosa reference strain and clinical isolates on polystyrene and glass surfaces at the concentration of 125 µg/ml. Global proteomic analysis of UMB-treated cells revealed the downregulation of major virulence-associated proteins such as RhlR, LasA, AlgL, FliD, Tpx, HtpG, KatA, FusA1, Tsf, PhzM, PhzB2, CarB, DctP, MtnA, and MscL. A functional interaction study, gene ontology, and KEGG pathway analysis revealed that UMB could modulate the global regulators, enzymes, co-factors, and transcription factors related to quorum sensing (QS), stress tolerance, siderophore production, motility, and microcolony formation. In vitro biochemical assays further affirmed the anti-virulence efficacy of UMB by reducing pyocyanin, protease, elastase, and catalase production in various strains of P. aeruginosa. Besides the antibiofilm activity, UMB-treated cells exhibited enhanced antibiotic susceptibility to various antibiotics including amikacin, kanamycin, tobramycin, ciprofloxacin, and cefotaxime. Furthermore, in vitro cytotoxicity analysis revealed the biocompatibility of UMB, and the IC50 value was determined to be 249.85 µg/ml on the HepG2 cell line. Altogether, the study substantiates the anti-virulence efficacy of UMB against P. aeruginosa, and the proteomic analysis reveals the differential expression of the regulators related to QS, stress response, and motility factors.
Collapse
|
40
|
Falà AK, Álvarez-Ordóñez A, Filloux A, Gahan CGM, Cotter PD. Quorum sensing in human gut and food microbiomes: Significance and potential for therapeutic targeting. Front Microbiol 2022; 13:1002185. [PMID: 36504831 PMCID: PMC9733432 DOI: 10.3389/fmicb.2022.1002185] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Accepted: 10/17/2022] [Indexed: 11/27/2022] Open
Abstract
Human gut and food microbiomes interact during digestion. The outcome of these interactions influences the taxonomical composition and functional capacity of the resident human gut microbiome, with potential consequential impacts on health and disease. Microbe-microbe interactions between the resident and introduced microbiomes, which likely influence host colonisation, are orchestrated by environmental conditions, elements of the food matrix, host-associated factors as well as social cues from other microorganisms. Quorum sensing is one example of a social cue that allows bacterial communities to regulate genetic expression based on their respective population density and has emerged as an attractive target for therapeutic intervention. By interfering with bacterial quorum sensing, for instance, enzymatic degradation of signalling molecules (quorum quenching) or the application of quorum sensing inhibitory compounds, it may be possible to modulate the microbial composition of communities of interest without incurring negative effects associated with traditional antimicrobial approaches. In this review, we summarise and critically discuss the literature relating to quorum sensing from the perspective of the interactions between the food and human gut microbiome, providing a general overview of the current understanding of the prevalence and influence of quorum sensing in this context, and assessing the potential for therapeutic targeting of quorum sensing mechanisms.
Collapse
Affiliation(s)
- A. Kate Falà
- APC Microbiome Ireland, University College Cork, Cork, Ireland,School of Microbiology, University College Cork, Cork, Ireland,Food Bioscience Department, Teagasc Food Research Centre, Fermoy, Ireland
| | - Avelino Álvarez-Ordóñez
- Department of Food Hygiene and Technology and Institute of Food Science and Technology, Universidad de León, León, Spain
| | - Alain Filloux
- MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Cormac G. M. Gahan
- APC Microbiome Ireland, University College Cork, Cork, Ireland,School of Microbiology, University College Cork, Cork, Ireland,School of Pharmacy, University College Cork, Cork, Ireland
| | - Paul D. Cotter
- APC Microbiome Ireland, University College Cork, Cork, Ireland,Food Bioscience Department, Teagasc Food Research Centre, Fermoy, Ireland,*Correspondence: Paul D. Cotter,
| |
Collapse
|
41
|
He Y, Wu L, Liao P, Shen L, Yang H. Phenotypic and genotypic characterization of multi-drug resistance Pseudomonas aeruginosa isolated from urinary tract infections of non-catheterized and catheterized Chinese patients: A descriptive study over 3 years. Medicine (Baltimore) 2022; 101:e31373. [PMID: 36451381 PMCID: PMC9704882 DOI: 10.1097/md.0000000000031373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Urinary tract infections (UTI) are commonest infections, especially in catheterized patients. It is responsible of mortality and morbidity among hospitalized patients. The objectives of the study were to demonstrate the virulence factors and their genes of multi-drug resistance Pseudomonas aeruginosa causing UTI. A total of 366 non-catheterized and 171 catheterized patients' (in whom the catheter was in > 48 hours duration) urine samples (one sample/patient) from both sexes were collected and processed. >105 colony forming unit was considered as Pseudomonas aeruginosa culture-positive. Antimicrobial susceptibility testing was done by the Kirby Bauer disc diffusion method (The Clinical and laboratory standards institute guidelines 2019). The virulence factors were detected by in vitro assay method and polymerase chain reaction was done to detect the resistance genes present in Pseudomonas aeruginosa. Biofilm production was detected by the microtiter plate method. Out of 537 urine samples a total of 280 (52%) were females and 257 (48%) were male patients. Out of 366 non-catheterized urine samples 42 (23.6%) grew Pseudomonas aeruginosa and out of 171 catheterized urine 23 (25.84%) grew Pseudomonas aeruginosa. All were multi-drug resistance strains. A total of 10 (23.80%), 42 (100%), 8 (19.05%), 24 (57.14%), and 36 (85.71%) produced the Metallo-β-lactamases, AmpC-β-lactamase, carbapenemase, strong biofilm, and twitching motility positive, respectively in non-catheterized urine samples. A total of 11, 34, 9, 28, and 37 were oxacillinases-23, multidrug efflux protein resistance, New Delhi metallo-ß-lactamase-1, Verona Integron-encoded MBL, and Pseudomonas specific enzyme gene detected in non-catheterized urine samples. A total of 8 (34.8%), 6 (26.01%), 4 (17.39%), 15 (65.2%), and 18 (78.26%) were produced Metallo-β-lactamases, carbapenemase, AmpC-β-lactamase, strong biofilm, and twitching motility positive, respectively in catheterized urine samples. A total of 6, 18, 4, 16, and 15 were oxacillinases 23, multidrug efflux protein resistance, New Delhi metallo-ß-lactamase-1, Verona Integron-encoded MBL, and Pseudomonas specific enzyme, respectively genes detected in catheterized urine samples. Biofilm formation and twitching motility showed correlation among culture-positive Pseudomonas aeruginosa strains from catheterized patients (Correlation coefficients = 6.2, 95% confidence interval: 5.4-7.2). A better hospital infection control practice and detailed investigation of the microevolution of Pseudomonas aeruginosa in UTI are needed.
Collapse
Affiliation(s)
- Yanhong He
- Department of Clinical Laboratory, Anting Hospital, Anting Town, Jiading District, Shanghai, China
| | - Lamei Wu
- Department of Clinical Laboratory, Anting Hospital, Anting Town, Jiading District, Shanghai, China
| | - Pingming Liao
- Department of Clinical Laboratory, Anting Hospital, Anting Town, Jiading District, Shanghai, China
| | - Lili Shen
- Department of Clinical Laboratory, Anting Hospital, Anting Town, Jiading District, Shanghai, China
| | - Huijian Yang
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Pudong New Area, Shanghai, China
- * Correspondence: Huijian Yang, Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Pudong New Area, Shanghai, China (e-mail: )
| |
Collapse
|
42
|
Lu Y, Liu Y, Zhou C, Liu Y, Long Y, Lin D, Xiong R, Xiao Q, Huang B, Chen C. Quorum sensing regulates heteroresistance in Pseudomonas aeruginosa. Front Microbiol 2022; 13:1017707. [PMID: 36386621 PMCID: PMC9650436 DOI: 10.3389/fmicb.2022.1017707] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 10/07/2022] [Indexed: 10/29/2023] Open
Abstract
The prevalence and genetic mechanism of antibiotic heteroresistance (HR) have attracted significant research attention recently. However, non-genetic mechanism of HR has not been adequately explored. The present study aimed to evaluate the role of quorum sensing (QS), an important mechanism of behavioral coordination in different subpopulations and consequent heteroresistance. First, the prevalence of HR to 7 antibiotics was investigated in 170 clinical isolates of P. aeruginosa using population analysis profiles. The results showed that P. aeruginosa was significantly heteroresistant to meropenem (MEM), amikacin (AMK), ciprofloxacin (CIP), and ceftazidime (CAZ). The observed HR was correlated with down-regulation of QS associated genes lasI and rhlI. Further, loss-of-function analysis results showed that reduced expression of lasI and rhlI enhanced HR of P. aeruginosa to MEM, AMK, CIP, and CAZ. Conversely, overexpression of these genes or treatment with 3-oxo-C12-HSL/C4-HSL lowered HR of P. aeruginosa to the four antibiotics. Additionally, although downregulation of oprD and upregulation of efflux-associated genes was evident in heteroresistant subpopulations, their expression was not regulated by LasI and RhlI. Moreover, fitness cost measurements disclosed higher growth rates of PAO1ΔlasI and PAO1ΔrhlI in the presence of sub-MIC antibiotic as compared with that of wild-type PAO1. Our data suggest that under temporary antibiotic pressure, downregulation of QS might result in less fitness cost and promote HR of P. aeruginosa.
Collapse
Affiliation(s)
- Yang Lu
- Department of Laboratory Medicine, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People’s Hospital, Qingyuan, China
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuyang Liu
- Department of Laboratory Medicine, Chengdu First People's Hospital, Chengdu, China
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Chenxu Zhou
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yaqin Liu
- Department of Laboratory Medicine, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People’s Hospital, Qingyuan, China
| | - Yifei Long
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dongling Lin
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Rui Xiong
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Qian Xiao
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Bin Huang
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Cha Chen
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| |
Collapse
|
43
|
Evolution of Quorum Sensing in Pseudomonas aeruginosa Can Occur via Loss of Function and Regulon Modulation. mSystems 2022; 7:e0035422. [PMID: 36190124 PMCID: PMC9600717 DOI: 10.1128/msystems.00354-22] [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: 12/24/2022] Open
Abstract
Pseudomonas aeruginosa populations evolving in cystic fibrosis lungs, animal hosts, natural environments and in vitro undergo extensive genetic adaption and diversification. A common mutational target is the quorum sensing (QS) system, a three-unit regulatory system that controls the expression of virulence factors and secreted public goods. Three evolutionary scenarios have been advocated to explain selection for QS mutants: (i) disuse of the regulon, (ii) cheating through the exploitation of public goods, or (ii) modulation of the QS regulon. Here, we examine these scenarios by studying a set of 61 QS mutants from an experimental evolution study. We observed nonsynonymous mutations in all three QS systems: Las, Rhl, and Pseudomonas Quinolone Signal (PQS). The majority of the Las mutants had large deletions of the Las regulon, resulting in loss of QS function and the inability to produce QS-regulated traits, thus supporting the first or second scenarios. Conversely, phenotypic and gene expression analyses of Rhl mutants support network modulation (third scenario), as these mutants overexpressed the Las and Rhl receptors and showed an altered QS-regulated trait production profile. PQS mutants also showed patterns of regulon modulation leading to strain diversification and phenotypic tradeoffs, where the upregulation of certain QS traits is associated with the downregulation of others. Overall, our results indicate that mutations in the different QS systems lead to diverging effects on the QS trait profile in P. aeruginosa populations. These mutations might not only affect the plasticity and diversity of evolved populations but could also impact bacterial fitness and virulence in infections. IMPORTANCE Pseudomonas aeruginosa uses quorum sensing (QS), a three-unit multilayered network, to coordinate expression of traits required for growth and virulence in the context of infections. Despite its importance for bacterial fitness, the QS regulon appears to be a common mutational target during long-term adaptation of P. aeruginosa in the host, natural environments, and experimental evolutions. This raises questions of why such an important regulatory system is under selection and how mutations change the profile of QS-regulated traits. Here, we examine a set of 61 experimentally evolved QS mutants to address these questions. We found that mutations involving the master regulator, LasR, resulted in an almost complete breakdown of QS, while mutations in RhlR and PqsR resulted in modulations of the regulon, where both the regulon structure and the QS-regulated trait profile changed. Our work reveals that natural selection drives diversification in QS activity patterns in evolving populations.
Collapse
|
44
|
Naoun AA, Raphael I, Forsthuber TG. Immunoregulation via Cell Density and Quorum Sensing-like Mechanisms: An Underexplored Emerging Field with Potential Translational Implications. Cells 2022; 11:cells11152442. [PMID: 35954285 PMCID: PMC9368058 DOI: 10.3390/cells11152442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/27/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022] Open
Abstract
Quorum sensing (QS) was historically described as a mechanism by which bacteria detect and optimize their population density via gene regulation based on dynamic environmental cues. Recently, it was proposed that QS or similar mechanisms may have broader applications across different species and cell types. Indeed, emerging evidence shows that the mammalian immune system can also elicit coordinated responses on a population level to regulate cell density and function, thus suggesting that QS-like mechanisms may also be a beneficial trait of the immune system. In this review, we explore and discuss potential QS-like mechanisms deployed by the immune system to coordinate cellular-level responses, such as T cell responses mediated via the common gamma chain (γc) receptor cytokines and the aryl hydrocarbon receptors (AhRs). We present evidence regarding a novel role of QS as a multifunctional mechanism coordinating CD4+ and CD8+ T cell behavior during steady state and in response to infection, inflammatory diseases, and cancer. Successful clinical therapies such as adoptive cell transfer for cancer treatment may be re-evaluated to harness the effects of the QS mechanism(s) and enhance treatment responsiveness. Moreover, we discuss how signaling threshold perturbations through QS-like mediators may result in disturbances of the complex crosstalk between immune cell populations, undesired T cell responses, and induction of autoimmune pathology. Finally, we discuss the potential therapeutic role of modulating immune-system-related QS as a promising avenue to treat human diseases.
Collapse
Affiliation(s)
- Adrian A. Naoun
- Department of Molecular Microbiology and Immunology, University of Texas at San Antonio, San Antonio, TX 78249, USA
| | - Itay Raphael
- Department of Neurological Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15217, USA
- Correspondence: (I.R.); (T.G.F.)
| | - Thomas G. Forsthuber
- Department of Molecular Microbiology and Immunology, University of Texas at San Antonio, San Antonio, TX 78249, USA
- Correspondence: (I.R.); (T.G.F.)
| |
Collapse
|
45
|
3-oxo-C12:2-HSL, quorum sensing molecule from human intestinal microbiota, inhibits pro-inflammatory pathways in immune cells via bitter taste receptors. Sci Rep 2022; 12:9440. [PMID: 35676403 PMCID: PMC9177545 DOI: 10.1038/s41598-022-13451-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 05/13/2022] [Indexed: 12/26/2022] Open
Abstract
In the gut ecosystem, microorganisms regulate group behaviour and interplay with the host via a molecular system called quorum sensing (QS). The QS molecule 3-oxo-C12:2-HSL, first identified in human gut microbiota, exerts anti-inflammatory effects and could play a role in inflammatory bowel diseases where dysbiosis has been described. Our aim was to identify which signalling pathways are involved in this effect. We observed that 3-oxo-C12:2-HSL decreases expression of pro-inflammatory cytokines such as Interleukine-1β (− 35%) and Tumor Necrosis Factor-α (TNFα) (− 40%) by stimulated immune RAW264.7 cells and decreased TNF secretion by stimulated PBMC in a dose-dependent manner, between 25 to 100 µM. Transcriptomic analysis of RAW264.7 cells exposed to 3-oxo-C12:2-HSL, in a pro-inflammatory context, highlighted JAK-STAT, NF-κB and TFN signalling pathways and we confirmed that 3-oxo-C12:2-HSL inhibited JAK1 and STAT1 phosphorylation. We also showed through a screening assay that 3-oxo-C12:2-HSL interacted with several human bitter taste receptors. Its anti-inflammatory effect involved TAS2R38 as shown by pharmacologic inhibition and led to an increase in intracellular calcium levels. We thus unravelled the involvement of several cellular pathways in the anti-inflammatory effects exerted by the QS molecule 3-oxo-C12:2-HSL.
Collapse
|
46
|
Machine learning aided construction of the quorum sensing communication network for human gut microbiota. Nat Commun 2022; 13:3079. [PMID: 35654892 PMCID: PMC9163137 DOI: 10.1038/s41467-022-30741-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 05/17/2022] [Indexed: 01/02/2023] Open
Abstract
Quorum sensing (QS) is a cell-cell communication mechanism that connects members in various microbial systems. Conventionally, a small number of QS entries are collected for specific microbes, which is far from being able to fully depict communication-based complex microbial interactions in human gut microbiota. In this study, we propose a systematic workflow including three modules and the use of machine learning-based classifiers to collect, expand, and mine the QS-related entries. Furthermore, we develop the Quorum Sensing of Human Gut Microbes (QSHGM) database (http://www.qshgm.lbci.net/) including 28,567 redundancy removal entries, to bridge the gap between QS repositories and human gut microbiota. With the help of QSHGM, various communication-based microbial interactions can be searched and a QS communication network (QSCN) is further constructed and analysed for 818 human gut microbes. This work contributes to the establishment of the QSCN which may form one of the key knowledge maps of the human gut microbiota, supporting future applications such as new manipulations to synthetic microbiota and potential therapies to gut diseases. Microbes communicate with each other by Quorum sensing (QS) languages. Here the authors construct a QS database and the QS communication network to decipher intricate QSbased communications and form one of the key knowledge maps for human gut microbiota.
Collapse
|
47
|
Li K, Ly K, Mehta S, Braithwaite A. Importance of crosstalk between the microbiota and the neuroimmune system for tissue homeostasis. Clin Transl Immunology 2022; 11:e1394. [PMID: 35620584 PMCID: PMC9125509 DOI: 10.1002/cti2.1394] [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] [Received: 12/22/2021] [Revised: 04/30/2022] [Accepted: 05/01/2022] [Indexed: 11/23/2022] Open
Abstract
The principal function of inflammation is cellular defence against ‘danger signals’ such as tissue injury and pathogen infection to maintain the homeostasis of the organism. The initiation and progression of inflammation are not autonomous as there is substantial evidence that inflammation is known to be strongly influenced by ‘neuroimmune crosstalk’, involving the production and expression of soluble signalling molecules that interact with cell surface receptors. In addition, microbiota have been found to be involved in the development and function of the nervous and immune systems and play an important role in health and disease. Herein, we provide an outline of the mechanisms of neuroimmune communication in the regulation of inflammation and immune response and then provide evidence for the involvement of microbiota in the development and functions of the host nervous and immune systems. It appears that the nervous and immune systems in multicellular organisms have co‐evolved with the microbiota, such that all components are in communication to maximise the ability of the organism to adapt to a wide range of environmental stresses to maintain or restore tissue homeostasis.
Collapse
Affiliation(s)
- Kunyu Li
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| | - Kevin Ly
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| | - Sunali Mehta
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| | - Antony Braithwaite
- Department of Pathology Dunedin School of Medicine University of Otago Dunedin New Zealand
| |
Collapse
|
48
|
Making Sense of Quorum Sensing at the Intestinal Mucosal Interface. Cells 2022; 11:cells11111734. [PMID: 35681429 PMCID: PMC9179481 DOI: 10.3390/cells11111734] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 12/12/2022] Open
Abstract
The gut microbiome can produce metabolic products that exert diverse activities, including effects on the host. Short chain fatty acids and amino acid derivatives have been the focus of many studies, but given the high microbial density in the gastrointestinal tract, other bacterial products such as those released as part of quorum sensing are likely to play an important role for health and disease. In this review, we provide of an overview on quorum sensing (QS) in the gastrointestinal tract and summarise what is known regarding the role of QS molecules such as auto-inducing peptides (AIP) and acyl-homoserine lactones (AHL) from commensal, probiotic, and pathogenic bacteria in intestinal health and disease. QS regulates the expression of numerous genes including biofilm formation, bacteriocin and toxin secretion, and metabolism. QS has also been shown to play an important role in the bacteria–host interaction. We conclude that the mechanisms of action of QS at the intestinal neuro–immune interface need to be further investigated.
Collapse
|
49
|
Xie Y, Chen J, Wang B, Peng AY, Mao ZW, Xia W. Inhibition of Quorum-Sensing Regulator from Pseudomonas aeruginosa Using a Flavone Derivative. Molecules 2022; 27:molecules27082439. [PMID: 35458637 PMCID: PMC9031925 DOI: 10.3390/molecules27082439] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/31/2022] [Accepted: 04/06/2022] [Indexed: 01/19/2023] Open
Abstract
Quorum sensing (QS) is a cell-to-cell communication process that controls bacterial collective behaviors. The QS network regulates and coordinates bacterial virulence factor expression, antibiotic resistance and biofilm formation. Therefore, inhibition of the QS system is an effective strategy to suppress the bacterial virulence. Herein, we identify a phosphate ester derivative of chrysin as a potent QS inhibitor of the human pathogen Pseudomonas aeruginosa (P. aeruginosa) using a designed luciferase reporter assay. In vitro biochemical analysis shows that the chrysin derivative binds to the bacterial QS regulator LasR and abrogates its DNA-binding capability. In particular, the derivative exhibits higher anti-virulence activity compared to the parent molecule. All the results reveal the potential application of flavone derivative as an anti-virulence compound to combat the infectious diseases caused by P. aeruginosa.
Collapse
Affiliation(s)
- Yanxuan Xie
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; (Y.X.); (J.C.); (B.W.); (A.-Y.P.)
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jingxin Chen
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; (Y.X.); (J.C.); (B.W.); (A.-Y.P.)
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
| | - Bo Wang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; (Y.X.); (J.C.); (B.W.); (A.-Y.P.)
| | - Ai-Yun Peng
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; (Y.X.); (J.C.); (B.W.); (A.-Y.P.)
| | - Zong-Wan Mao
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; (Y.X.); (J.C.); (B.W.); (A.-Y.P.)
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
- Correspondence: (Z.-W.M.); (W.X.)
| | - Wei Xia
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; (Y.X.); (J.C.); (B.W.); (A.-Y.P.)
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
- Correspondence: (Z.-W.M.); (W.X.)
| |
Collapse
|
50
|
Investigation of Direct and Retro Chromone-2-Carboxamides Based Analogs of Pseudomonas aeruginosa Quorum Sensing Signal as New Anti-Biofilm Agents. Pharmaceuticals (Basel) 2022; 15:ph15040417. [PMID: 35455414 PMCID: PMC9026348 DOI: 10.3390/ph15040417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/19/2022] [Accepted: 03/28/2022] [Indexed: 11/17/2022] Open
Abstract
Biofilm formation is considered a major cause of therapeutic failure because bacteria in biofilms have higher protection against antimicrobials. Thus, biofilm-related infections are extremely challenging to treat and pose major concerns for public health, along with huge economic impacts. Pseudomonas aeruginosa, in particular, is a “critical priority” pathogen, responsible for severe infections, especially in cystic fibrosis patients because of its capacity to form resistant biofilms. Therefore, new therapeutic approaches are needed to complete the pipeline of molecules offering new targets and modes of action. Biofilm formation is mainly controlled by Quorum Sensing (QS), a communication system based on signaling molecules. In the present study, we employed a molecular docking approach (Autodock Vina) to assess two series of chromones-based compounds as possible ligands for PqsR, a LuxR-type receptor. Most compounds showed good predicted affinities for PqsR, higher than the PQS native ligand. Encouraged by these docking results, we synthesized a library of 34 direct and 25 retro chromone carboxamides using two optimized routes from 2-chromone carboxylic acid as starting material for both series. We evaluated the synthesized carboxamides for their ability to inhibit the biofilm formation of P. aeruginosa in vitro. Overall, results showed several chromone 2-carboxamides of the retro series are potent inhibitors of the formation of P. aeruginosa biofilms (16/25 compound with % inhibition ≥ 50% at 50 μM), without cytotoxicity on Vero cells (IC50 > 1.0 mM). The 2,4-dinitro-N-(4-oxo-4H-chromen-2-yl) benzamide (6n) was the most promising antibiofilm compound, with potential for hit to lead optimization.
Collapse
|