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Aggarwal S, Singh V, Chakraborty A, Cha S, Dimitriou A, de Crescenzo C, Izikson O, Yu L, Plebani R, Tzika AA, Rahme LG. Skeletal muscle mitochondrial dysfunction mediated by Pseudomonas aeruginosa quorum-sensing transcription factor MvfR: reversing effects with anti-MvfR and mitochondrial-targeted compounds. mBio 2024; 15:e0129224. [PMID: 38860823 PMCID: PMC11253625 DOI: 10.1128/mbio.01292-24] [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: 05/02/2024] [Accepted: 05/14/2024] [Indexed: 06/12/2024] Open
Abstract
Sepsis and chronic infections with Pseudomonas aeruginosa, a leading "ESKAPE" bacterial pathogen, are associated with increased morbidity and mortality and skeletal muscle atrophy. The actions of this pathogen on skeletal muscle remain poorly understood. In skeletal muscle, mitochondria serve as a crucial energy source, which may be perturbed by infection. Here, using the well-established backburn and infection model of murine P. aeruginosa infection, we deciphered the systemic impact of the quorum-sensing transcription factor MvfR (multiple virulence factor regulator) by interrogating, 5 days post-infection, its effect on mitochondrial-related functions in the gastrocnemius skeletal muscle and the outcome of the pharmacological inhibition of MvfR function and that of the mitochondrial-targeted peptide, Szeto-Schiller 31 (SS-31). Our findings show that the MvfR perturbs adenosine triphosphate generation, oxidative phosphorylation, and antioxidant response, elevates the production of reactive oxygen species, and promotes oxidative damage of mitochondrial DNA in the gastrocnemius muscle of infected mice. These impairments in mitochondrial-related functions were corroborated by the alteration of key mitochondrial proteins involved in electron transport, mitochondrial biogenesis, dynamics and quality control, and mitochondrial uncoupling. Pharmacological inhibition of MvfR using the potent anti-MvfR lead, D88, we developed, or the mitochondrial-targeted peptide SS-31 rescued the MvfR-mediated alterations observed in mice infected with the wild-type strain PA14. Our study provides insights into the actions of MvfR in orchestrating mitochondrial dysfunction in the skeletal murine muscle, and it presents novel therapeutic approaches for optimizing clinical outcomes in affected patients. IMPORTANCE Skeletal muscle, pivotal for many functions in the human body, including breathing and protecting internal organs, contains abundant mitochondria essential for maintaining cellular homeostasis during infection. The effect of Pseudomonas aeruginosa (PA) infections on skeletal muscle remains poorly understood. Our study delves into the role of a central quorum-sensing transcription factor, multiple virulence factor regulator (MvfR), that controls the expression of multiple acute and chronic virulence functions that contribute to the pathogenicity of PA. The significance of our study lies in the role of MvfR in the metabolic perturbances linked to mitochondrial functions in skeletal muscle and the effectiveness of the novel MvfR inhibitor and the mitochondrial-targeted peptide SS-31 in alleviating the mitochondrial disturbances caused by PA in skeletal muscle. Inhibiting MvfR or interfering with its effects can be a potential therapeutic strategy to curb PA virulence.
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Affiliation(s)
- Shifu Aggarwal
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Vijay Singh
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Arijit Chakraborty
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
- Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
| | - Sujin Cha
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Alexandra Dimitriou
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Claire de Crescenzo
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Olivia Izikson
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Lucy Yu
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Roberto Plebani
- Department of Medical, Oral and Biotechnological Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - A. Aria Tzika
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
| | - Laurence G. Rahme
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
- Shriners Hospitals for Children Boston, Boston, Massachusetts, USA
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2
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Connor MG, Hamon MA. Advances in regulation of homeostasis through chromatin modifications by airway commensals. Curr Opin Microbiol 2024; 80:102505. [PMID: 38936013 DOI: 10.1016/j.mib.2024.102505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 06/07/2024] [Accepted: 06/07/2024] [Indexed: 06/29/2024]
Abstract
Commensal bacteria are residents of the human airway where they interact with both colonizing pathogens and host respiratory epithelial cells of this mucosal surface. It is here that commensals exert their influence through host signaling cascades, host transcriptional responses and host immunity, all of which are rooted in chromatin remodeling and histone modifications. Recent studies show that airway commensals impact host chromatin, but compared the what is known for gut commensals, the field remains in its infancy. The mechanisms by which airway commensals regulate respiratory health and homeostasis through chromatin modifications is of increasing interest, specifically since their displacement precedes the increased potential for respiratory disease. Herein we will discuss recent advances and intriguing avenues of future work aimed at deciphering how airway commensals protect and influence respiratory health.
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Affiliation(s)
- Michael G Connor
- Institut Pasteur, Université de Paris Cité, Unité Chromatine et Infection, F-75015 Paris, France.
| | - Melanie A Hamon
- Institut Pasteur, Université de Paris Cité, Unité Chromatine et Infection, F-75015 Paris, France.
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3
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Chakraborty A, Bandyopadhaya A, Singh V, Kovacic F, Cha S, Oldham W, Tzika AA, Rahme L. The Bacterial Quorum-Sensing Signal 2-Aminoacetophenone Rewires Immune Cell Bioenergetics through the PGC-1α/ERRα Axis to Mediate Tolerance to Infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.26.582124. [PMID: 38464050 PMCID: PMC10925214 DOI: 10.1101/2024.02.26.582124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
How bacterial pathogens exploit host metabolism to promote immune tolerance and persist in infected hosts remains elusive. To achieve this, we show that Pseudomonas aeruginosa (PA), a recalcitrant pathogen, utilizes the quorum sensing (QS) signal 2-aminoacetophenone (2-AA). Here, we unveil how 2-AA-driven immune tolerization causes distinct metabolic perturbations in macrophages mitochondrial respiration and bioenergetics. We present evidence indicating that these effects stem from decreased pyruvate transport into mitochondria. This reduction is attributed to decreased expression of the mitochondrial pyruvate carrier (MPC1), which is mediated by diminished expression and nuclear presence of its transcriptional regulator, estrogen-related nuclear receptor alpha (ERRα). Consequently, ERRα exhibits weakened binding to the MPC1 promoter. This outcome arises from the impaired interaction between ERRα and the peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α). Ultimately, this cascade results in diminished pyruvate influx into mitochondria and, consequently reduced ATP production in tolerized macrophages. Exogenously added ATP in infected macrophages restores the transcript levels of MPC1 and ERRα and enhances cytokine production and intracellular bacterial clearance. Consistent with the in vitro findings, murine infection studies corroborate the 2-AA-mediated long-lasting decrease in ATP and acetyl-CoA and its association with PA persistence, further supporting this QS signaling molecule as the culprit of the host bioenergetic alterations and PA persistence. These findings unveil 2-AA as a modulator of cellular immunometabolism and reveal an unprecedented mechanism of host tolerance to infection involving the PGC-1α/ERRα axis in its influence on MPC1/OXPHOS-dependent energy production and PA clearance. These paradigmatic findings pave the way for developing treatments to bolster host resilience to pathogen-induced damage. Given that QS is a common characteristic of prokaryotes, it is likely that 2-AA-like molecules with similar functions may be present in other pathogens.
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Barone S, Mateu B, Turco L, Pelliccia S, Lembo F, Summa V, Buommino E, Brindisi M. Unveiling the modulation of Pseudomonas aeruginosa virulence and biofilm formation by selective histone deacetylase 6 inhibitors. Front Microbiol 2024; 15:1340585. [PMID: 38371939 PMCID: PMC10869609 DOI: 10.3389/fmicb.2024.1340585] [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: 11/18/2023] [Accepted: 01/10/2024] [Indexed: 02/20/2024] Open
Abstract
Bacterial infections represent a key public health issue due to the occurrence of multidrug-resistant bacteria. Recently, the amount of data supporting the dynamic control of epigenetic pathways by environmental cues has triggered research efforts toward the clarification of their role in microbial infections. Among protein post-translational modifications, reversible acetylation is the most implicated in the feedback to environmental stimuli and in cellular homeostasis. Accordingly, the latest studies identified the histone deacetylase 6 (HDAC6) enzyme as a crucial player in the complex molecular machinery underlying bacterial clearance or killing. A very important milestone for the elucidation of the consequence of HDAC6 activity in bacterial infections is herein described, unveiling for the first time the role of a potent HDAC6 inhibitor in interfering with biofilm formation and modulating virulence factors of P. aeruginosa. We demonstrated that compound F2F-2020202 affected the production of some important virulence factors in P. aeruginosa, namely pyocyanin and rhamnolipids, clearly impairing its ability to form biofilm. Furthermore, evidence of possible QS involvement is supported by differential regulation of specific genes, namely RhlI, phAz1, and qsrO. The data herein obtained also complement and in part explain our previous results with selective HDAC6 inhibitors able to reduce inflammation and bacterial load in chronic infection models recapitulating the cystic fibrosis (CF) phenotype. This study fosters future in-depth investigation to allow the complete elucidation of the molecular mechanisms underlying HDAC6's role in bacterial infections.
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Affiliation(s)
- Simona Barone
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Baptiste Mateu
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Luigia Turco
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Sveva Pelliccia
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Francesca Lembo
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Vincenzo Summa
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
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Wrede D, Bordak M, Abraham Y, Mehedi M. Pulmonary Pathogen-Induced Epigenetic Modifications. EPIGENOMES 2023; 7:13. [PMID: 37489401 PMCID: PMC10366755 DOI: 10.3390/epigenomes7030013] [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: 05/23/2023] [Revised: 06/27/2023] [Accepted: 07/03/2023] [Indexed: 07/26/2023] Open
Abstract
Epigenetics generally involves genetic control by factors other than our own DNA sequence. Recent research has focused on delineating the mechanisms of two major epigenetic phenomena: DNA methylation and histone modification. As epigenetics involves many cellular processes, it is no surprise that it can also influence disease-associated gene expression. A direct link between respiratory infections, host cell epigenetic regulations, and chronic lung diseases is still unknown. Recent studies have revealed bacterium- or virus-induced epigenetic changes in the host cells. In this review, we focused on respiratory pathogens (viruses, bacteria, and fungi) induced epigenetic modulations (DNA methylation and histone modification) that may contribute to lung disease pathophysiology by promoting host defense or allowing pathogen persistence.
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Affiliation(s)
| | | | | | - Masfique Mehedi
- School of Medicine & Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA; (D.W.); (M.B.); (Y.A.)
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Myszor IT, Gudmundsson GH. Modulation of innate immunity in airway epithelium for host-directed therapy. Front Immunol 2023; 14:1197908. [PMID: 37251385 PMCID: PMC10213533 DOI: 10.3389/fimmu.2023.1197908] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 04/24/2023] [Indexed: 05/31/2023] Open
Abstract
Innate immunity of the mucosal surfaces provides the first-line defense from invading pathogens and pollutants conferring protection from the external environment. Innate immune system of the airway epithelium consists of several components including the mucus layer, mucociliary clearance of beating cilia, production of host defense peptides, epithelial barrier integrity provided by tight and adherens junctions, pathogen recognition receptors, receptors for chemokines and cytokines, production of reactive oxygen species, and autophagy. Therefore, multiple components interplay with each other for efficient protection from pathogens that still can subvert host innate immune defenses. Hence, the modulation of innate immune responses with different inducers to boost host endogenous front-line defenses in the lung epithelium to fend off pathogens and to enhance epithelial innate immune responses in the immunocompromised individuals is of interest for host-directed therapy. Herein, we reviewed possibilities of modulation innate immune responses in the airway epithelium for host-directed therapy presenting an alternative approach to standard antibiotics.
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Affiliation(s)
- Iwona T. Myszor
- Faculty of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | - Gudmundur Hrafn Gudmundsson
- Faculty of Life and Environmental Sciences, Biomedical Center, University of Iceland, Reykjavik, Iceland
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
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Abstract
OBJECTIVE This work addressing complexities in wound infection, seeks to test the reliance of bacterial pathogen Pseudomonas aeruginosa (PA) on host skin lipids to form biofilm with pathological consequences. BACKGROUND PA biofilm causes wound chronicity. Both CDC as well as NIH recognizes biofilm infection as a threat leading to wound chronicity. Chronic wounds on lower extremities often lead to surgical limb amputation. METHODS An established preclinical porcine chronic wound biofilm model, infected with PA or Pseudomonas aeruginosa ceramidase mutant (PA ∆Cer ), was used. RESULTS We observed that bacteria drew resource from host lipids to induce PA ceramidase expression by three orders of magnitude. PA utilized product of host ceramide catabolism to augment transcription of PA ceramidase. Biofilm formation was more robust in PA compared to PA ∆Cer . Downstream products of such metabolism such as sphingosine and sphingosine-1-phosphate were both directly implicated in the induction of ceramidase and inhibition of peroxisome proliferator-activated receptor (PPAR)δ, respectively. PA biofilm, in a ceram-idastin-sensitive manner, also silenced PPARδ via induction of miR-106b. Low PPARδ limited ABCA12 expression resulting in disruption of skin lipid homeostasis. Barrier function of the wound-site was thus compromised. CONCLUSIONS This work demonstrates that microbial pathogens must co-opt host skin lipids to unleash biofilm pathogenicity. Anti-biofilm strategies must not necessarily always target the microbe and targeting host lipids at risk of infection could be productive. This work may be viewed as a first step, laying fundamental mechanistic groundwork, toward a paradigm change in biofilm management.
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8
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Li Q, Pan H, Gao Z, Li W, Zhang L, Zhao J, Fang L, Chu Y, Yuan W, Shi J. High-expression of the innate-immune related gene UNC93B1 predicts inferior outcomes in acute myeloid leukemia. Front Genet 2023; 14:1063227. [PMID: 36741319 PMCID: PMC9891309 DOI: 10.3389/fgene.2023.1063227] [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: 10/06/2022] [Accepted: 01/06/2023] [Indexed: 01/19/2023] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous hematological malignancy with dismal prognosis. Identification of better biomarkers remained a priority to improve established stratification and guide therapeutic decisions. Therefore, we extracted the RNA sequence data and clinical characteristics of AML from The Cancer Genome Atlas (TCGA) and Genotype-Tissue Expression database (GTEx) to identify the key factors for prognosis. We found UNC93B1 was highly expressed in AML patients and significantly linked to poor clinical features (p < 0.05). We further validated the high expression of UNC93B1 in another independent AML cohort from GEO datasets (p < 0.001) and performed quantitative PCR of patient samples to confirm the overexpression of UNC93B1 in AML (p < 0.005). Moreover, we discovered high level of UNC93B1 was an independent prognostic factor for poorer outcome both in univariate analysis and multivariate regression (p < 0.001). Then we built a nomogram model based on UNC93B1 expression, age, FAB subtype and cytogenetic risk, the concordance index of which for predicting overall survival was 0.729 (p < 0.001). Time-dependent ROC analysis for predicting survival outcome at different time points by UNC93B1 showed the cumulative 2-year survival rate was 43.7%, and 5-year survival rate was 21.9%. The differentially expressed genes (DEGs) between two groups divided by UNC93B1 expression level were enriched in innate immune signaling and metabolic process pathway. Protein-protein interaction (PPI) network indicated four hub genes (S100A9, CCR1, MRC1 and CD1C) interacted with UNC93B1, three of which were also significantly linked to inferior outcome. Furthermore, we discovered high UNC93B1 tended to be infiltrated by innate immune cells, including Macrophages, Dendritic cells, Neutrophils, Eosinophils, and NK CD56dim cells. We also found UNC93B1 had a significantly positive correlation with CD14, CD68 and almost all Toll-like receptors. Finally, we revealed negatively correlated expression of UNC93B1 and BCL2 in AML and conjectured that high-UNC93B1 monocytic AML is more resistant to venetoclax. And we found high MCL-1 expression compensated for BCL-2 loss, thus, we proposed MCL-1 inhibitor might overcome the resistance of venetoclax in AML. Altogether, our findings demonstrated the utility of UNC93B1 as a powerful poor prognostic predictor and alternative therapeutic target.
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Affiliation(s)
- Qiaoli Li
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Hong Pan
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Zhen Gao
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Weiwang Li
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Lele Zhang
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Jingyu Zhao
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Liwei Fang
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Yajing Chu
- Center for Stem Cell Medicine and Department of Stem Cell & Regenerative Medicine, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Weiping Yuan
- Center for Stem Cell Medicine and Department of Stem Cell & Regenerative Medicine, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Jun Shi
- Regenerative Medicine Clinic, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China,*Correspondence: Jun Shi,
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Kayongo A, Robertson NM, Siddharthan T, Ntayi ML, Ndawula JC, Sande OJ, Bagaya BS, Kirenga B, Mayanja-Kizza H, Joloba ML, Forslund SK. Airway microbiome-immune crosstalk in chronic obstructive pulmonary disease. Front Immunol 2023; 13:1085551. [PMID: 36741369 PMCID: PMC9890194 DOI: 10.3389/fimmu.2022.1085551] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 12/28/2022] [Indexed: 01/19/2023] Open
Abstract
Chronic Obstructive Pulmonary Disease (COPD) has significantly contributed to global mortality, with three million deaths reported annually. This impact is expected to increase over the next 40 years, with approximately 5 million people predicted to succumb to COPD-related deaths annually. Immune mechanisms driving disease progression have not been fully elucidated. Airway microbiota have been implicated. However, it is still unclear how changes in the airway microbiome drive persistent immune activation and consequent lung damage. Mechanisms mediating microbiome-immune crosstalk in the airways remain unclear. In this review, we examine how dysbiosis mediates airway inflammation in COPD. We give a detailed account of how airway commensal bacteria interact with the mucosal innate and adaptive immune system to regulate immune responses in healthy or diseased airways. Immune-phenotyping airway microbiota could advance COPD immunotherapeutics and identify key open questions that future research must address to further such translation.
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Affiliation(s)
- Alex Kayongo
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda,Department of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda,Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda,Department of Medicine, Center for Emerging Pathogens, Rutgers, The State University of New Jersey, New Jersey Medical School, Newark, NJ, United States
| | | | - Trishul Siddharthan
- Division of Pulmonary Medicine, School of Medicine, University of Miami, Miami, FL, United States
| | - Moses Levi Ntayi
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda,Department of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda,Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Josephine Caren Ndawula
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda
| | - Obondo J. Sande
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Bernard S. Bagaya
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Bruce Kirenga
- Makerere University Lung Institute, Makerere University College of Health Sciences, Kampala, Uganda
| | - Harriet Mayanja-Kizza
- Department of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Moses L. Joloba
- Department of Immunology and Molecular Biology, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Sofia K. Forslund
- Experimental and Clinical Research Center, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany,Experimental and Clinical Research Center, a cooperation of Charité - Universitatsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany,Charité-Universitatsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany,DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Berlin, Germany,Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany,*Correspondence: Sofia K. Forslund,
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10
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Singh VK, Almpani M, Maura D, Kitao T, Ferrari L, Fontana S, Bergamini G, Calcaterra E, Pignaffo C, Negri M, de Oliveira Pereira T, Skinner F, Gkikas M, Andreotti D, Felici A, Déziel E, Lépine F, Rahme LG. Tackling recalcitrant Pseudomonas aeruginosa infections in critical illness via anti-virulence monotherapy. Nat Commun 2022; 13:5103. [PMID: 36042245 PMCID: PMC9428149 DOI: 10.1038/s41467-022-32833-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
Intestinal barrier derangement allows intestinal bacteria and their products to translocate to the systemic circulation. Pseudomonas aeruginosa (PA) superimposed infection in critically ill patients increases gut permeability and leads to gut-driven sepsis. PA infections are challenging due to multi-drug resistance (MDR), biofilms, and/or antibiotic tolerance. Inhibition of the quorum-sensing transcriptional regulator MvfR(PqsR) is a desirable anti-PA anti-virulence strategy as MvfR controls multiple acute and chronic virulence functions. Here we show that MvfR promotes intestinal permeability and report potent anti-MvfR compounds, the N-Aryl Malonamides (NAMs), resulting from extensive structure-activity-relationship studies and thorough assessment of the inhibition of MvfR-controlled virulence functions. This class of anti-virulence non-native ligand-based agents has a half-maximal inhibitory concentration in the nanomolar range and strong target engagement. Using a NAM lead in monotherapy protects murine intestinal barrier function, abolishes MvfR-regulated small molecules, ameliorates bacterial dissemination, and lowers inflammatory cytokines. This study demonstrates the importance of MvfR in PA-driven intestinal permeability. It underscores the utility of anti-MvfR agents in maintaining gut mucosal integrity, which should be part of any successful strategy to prevent/treat PA infections and associated gut-derived sepsis in critical illness settings. NAMs provide for the development of crucial preventive/therapeutic monotherapy options against untreatable MDR PA infections. Pseudomonas aeruginosa infections are increasingly difficult to treat due to the development of antimicrobial resistance. Here, the authors describe the synthesis, characterisation and efficacy of a quorum sensing inhibitor.
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Affiliation(s)
- Vijay K Singh
- Department of Surgery, Harvard Medical School and Massachusetts General Hospital, Boston, MA, 02114, USA.,Shriners Hospitals for Children, Boston, MA, 02114, USA.,Department of Microbiology, Harvard Medical School, Boston, MA, 02115, USA
| | - Marianna Almpani
- Department of Surgery, Harvard Medical School and Massachusetts General Hospital, Boston, MA, 02114, USA.,Shriners Hospitals for Children, Boston, MA, 02114, USA.,Department of Microbiology, Harvard Medical School, Boston, MA, 02115, USA
| | - Damien Maura
- Department of Surgery, Harvard Medical School and Massachusetts General Hospital, Boston, MA, 02114, USA.,Shriners Hospitals for Children, Boston, MA, 02114, USA.,Department of Microbiology, Harvard Medical School, Boston, MA, 02115, USA.,Voyager Therapeutics, Cambridge, MA, 02139, USA
| | - Tomoe Kitao
- Department of Surgery, Harvard Medical School and Massachusetts General Hospital, Boston, MA, 02114, USA.,Shriners Hospitals for Children, Boston, MA, 02114, USA.,Department of Microbiology, Harvard Medical School, Boston, MA, 02115, USA.,T. Kitao, Department of Microbiology, Graduate School of Medicine, Gifu University, Gifu, 501-1194, Japan
| | - Livia Ferrari
- Translational Biology Department, Aptuit (Verona) S.rl, an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Stefano Fontana
- DMPK Department, Aptuit (Verona) S.rl, an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Gabriella Bergamini
- Translational Biology Department, Aptuit (Verona) S.rl, an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Elisa Calcaterra
- Translational Biology Department, Aptuit (Verona) S.rl, an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Chiara Pignaffo
- DMPK Department, Aptuit (Verona) S.rl, an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Michele Negri
- In vitro Chemotherapy Laboratory, Aptuit (Verona) S.r.l., an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Thays de Oliveira Pereira
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique (INRS), Laval, Quebec, H7V 1B7, Canada
| | - Frances Skinner
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA, 01854, USA
| | - Manos Gkikas
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA, 01854, USA
| | - Danielle Andreotti
- Global Synthetic Chemistry Department, Aptuit (Verona) S.r.l., an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy
| | - Antonio Felici
- Department of Microbiology Discovery, In Vitro Biology, Aptuit (Verona) S.r.l., an Evotec Company, 37135 Via A. Fleming 4, Verona, Italy.,A Felici, Academic Partnership, Evotec SE, 37135 Via A. Fleming 4, Verona, Italy
| | - Eric Déziel
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique (INRS), Laval, Quebec, H7V 1B7, Canada
| | - Francois Lépine
- Centre Armand-Frappier Santé Biotechnologie, Institut National de la Recherche Scientifique (INRS), Laval, Quebec, H7V 1B7, Canada
| | - Laurence G Rahme
- Department of Surgery, Harvard Medical School and Massachusetts General Hospital, Boston, MA, 02114, USA. .,Shriners Hospitals for Children, Boston, MA, 02114, USA. .,Department of Microbiology, Harvard Medical School, Boston, MA, 02115, USA.
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11
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Khan A, Zhang K, Singh VK, Mishra A, Kachroo P, Bing T, Won JH, Mani A, Papanna R, Mann LK, Ledezma-Campos E, Aguillon-Duran G, Canaday DH, David SA, Restrepo BI, Viet NN, Phan H, Graviss EA, Musser JM, Kaushal D, Gauduin MC, Jagannath C. Human M1 macrophages express unique innate immune response genes after mycobacterial infection to defend against tuberculosis. Commun Biol 2022; 5:480. [PMID: 35590096 PMCID: PMC9119986 DOI: 10.1038/s42003-022-03387-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/21/2022] [Indexed: 12/23/2022] Open
Abstract
Mycobacterium tuberculosis (Mtb) is responsible for approximately 1.5 million deaths each year. Though 10% of patients develop tuberculosis (TB) after infection, 90% of these infections are latent. Further, mice are nearly uniformly susceptible to Mtb but their M1-polarized macrophages (M1-MΦs) can inhibit Mtb in vitro, suggesting that M1-MΦs may be able to regulate anti-TB immunity. We sought to determine whether human MΦ heterogeneity contributes to TB immunity. Here we show that IFN-γ-programmed M1-MΦs degrade Mtb through increased expression of innate immunity regulatory genes (Inregs). In contrast, IL-4-programmed M2-polarized MΦs (M2-MΦs) are permissive for Mtb proliferation and exhibit reduced Inregs expression. M1-MΦs and M2-MΦs express pro- and anti-inflammatory cytokine-chemokines, respectively, and M1-MΦs show nitric oxide and autophagy-dependent degradation of Mtb, leading to increased antigen presentation to T cells through an ATG-RAB7-cathepsin pathway. Despite Mtb infection, M1-MΦs show increased histone acetylation at the ATG5 promoter and pro-autophagy phenotypes, while increased histone deacetylases lead to decreased autophagy in M2-MΦs. Finally, Mtb-infected neonatal macaques express human Inregs in their lymph nodes and macrophages, suggesting that M1 and M2 phenotypes can mediate immunity to TB in both humans and macaques. We conclude that human MФ subsets show unique patterns of gene expression that enable differential control of TB after infection. These genes could serve as targets for diagnosis and immunotherapy of TB.
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Affiliation(s)
- Arshad Khan
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA
| | - Kangling Zhang
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, USA
| | - Vipul K Singh
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA
| | - Abhishek Mishra
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA
| | - Priyanka Kachroo
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA
| | - Tian Bing
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, USA
| | - Jong Hak Won
- Department of Obstetrics, Gynecology and Reproductive Sciences, UTHSC, Houston, TX, USA
| | - Arunmani Mani
- Department of Obstetrics, Gynecology and Reproductive Sciences, UTHSC, Houston, TX, USA
| | - Ramesha Papanna
- Department of Obstetrics, Gynecology and Reproductive Sciences, UTHSC, Houston, TX, USA
| | - Lovepreet K Mann
- Department of Obstetrics, Gynecology and Reproductive Sciences, UTHSC, Houston, TX, USA
| | | | | | - David H Canaday
- Division of Infectious Disease, Case Western Reserve University Cleveland VA, Cleveland, OH, USA
| | - Sunil A David
- Virovax, LLC, Adjuvant Division, Lawrence, Kansas, USA
| | - Blanca I Restrepo
- UT School of Public Health, Brownsville, and STDOI, UT Rio Grande Valley, Brownsville, TX, USA
| | | | - Ha Phan
- Center for Promotion of Advancement of Society, Ha Noi, Vietnam
| | - Edward A Graviss
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA
| | - James M Musser
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA
| | - Deepak Kaushal
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Marie Claire Gauduin
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Chinnaswamy Jagannath
- Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Weill-Cornell Medicine, Houston, TX, USA.
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12
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Sui J, Qiao W, Xiang X, Luo Y. Epigenetic Changes in Mycobacterium tuberculosis and its Host Provide Potential Targets or Biomarkers for Drug Discovery and Clinical Diagnosis. Pharmacol Res 2022; 179:106195. [DOI: 10.1016/j.phrs.2022.106195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/14/2022] [Accepted: 03/25/2022] [Indexed: 11/26/2022]
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13
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Barone S, Cassese E, Alfano AI, Brindisi M, Summa V. Chasing a Breath of Fresh Air in Cystic Fibrosis (CF): Therapeutic Potential of Selective HDAC6 Inhibitors to Tackle Multiple Pathways in CF Pathophysiology. J Med Chem 2022; 65:3080-3097. [PMID: 35148101 PMCID: PMC8883472 DOI: 10.1021/acs.jmedchem.1c02067] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
![]()
Compelling new support
has been provided for histone deacetylase
isoform 6 (HDAC6) as a common thread in the generation of the dysregulated
proinflammatory and fibrotic phenotype in cystic fibrosis (CF). HDAC6
also plays a crucial role in bacterial clearance or killing as a direct
consequence of its effects on CF immune responses. Inhibiting HDAC6
functions thus eventually represents an innovative and effective strategy
to tackle multiple aspects of CF-associated lung disease. In this
Perspective, we not only showcase the latest evidence linking HDAC(6)
activity and expression with CF phenotype but also track the new dawn
of HDAC(6) modulators in CF and explore potentialities and future
perspectives in the field.
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Affiliation(s)
- Simona Barone
- Department of Pharmacy, Department of Excellence 2018-2022, School of Medicine and Surgery, University of Naples "Federico II", Via D. Montesano 49, I-80131 Naples, Italy
| | - Emilia Cassese
- Department of Pharmacy, Department of Excellence 2018-2022, School of Medicine and Surgery, University of Naples "Federico II", Via D. Montesano 49, I-80131 Naples, Italy
| | - Antonella Ilenia Alfano
- Department of Pharmacy, Department of Excellence 2018-2022, School of Medicine and Surgery, University of Naples "Federico II", Via D. Montesano 49, I-80131 Naples, Italy
| | - Margherita Brindisi
- Department of Pharmacy, Department of Excellence 2018-2022, School of Medicine and Surgery, University of Naples "Federico II", Via D. Montesano 49, I-80131 Naples, Italy
| | - Vincenzo Summa
- Department of Pharmacy, Department of Excellence 2018-2022, School of Medicine and Surgery, University of Naples "Federico II", Via D. Montesano 49, I-80131 Naples, Italy
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14
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Singh S, Senapati P, Kundu TK. Metabolic Regulation of Lysine Acetylation: Implications in Cancer. Subcell Biochem 2022; 100:393-426. [PMID: 36301501 DOI: 10.1007/978-3-031-07634-3_12] [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] [Indexed: 06/16/2023]
Abstract
Lysine acetylation is the second most well-studied post-translational modification after phosphorylation. While phosphorylation regulates signaling cascades, one of the most significant roles of acetylation is regulation of chromatin structure. Acetyl-coenzyme A (acetyl-CoA) serves as the acetyl group donor for acetylation reactions mediated by lysine acetyltransferases (KATs). On the other hand, NAD+ serves as the cofactor for lysine deacetylases (KDACs). Both acetyl-CoA and NAD+ are metabolites integral to energy metabolism, and therefore, their metabolic flux can regulate the activity of KATs and KDACs impacting the epigenome. In this chapter, we review our current understanding of how metabolic pathways regulate lysine acetylation in normal and cancer cells.
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Affiliation(s)
- Siddharth Singh
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India
| | - Parijat Senapati
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India
- Beckman Research Institute, City of Hope, Duarte, CA, USA
| | - Tapas K Kundu
- Transcription and Disease Laboratory, Molecular Biology and Genetics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, Karnataka, India.
- Division of Cancer Biology, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.
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15
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Rajeev R, Dwivedi AP, Sinha A, Agarwaal V, Dev RR, Kar A, Khosla S. Epigenetic interaction of microbes with their mammalian hosts. J Biosci 2021. [PMID: 34728591 PMCID: PMC8550911 DOI: 10.1007/s12038-021-00215-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The interaction of microbiota with its host has the ability to alter the cellular functions of both, through several mechanisms. Recent work, from many laboratories including our own, has shown that epigenetic mechanisms play an important role in the alteration of these cellular functions. Epigenetics broadly refers to change in the phenotype without a corresponding change in the DNA sequence. This change is usually brought by epigenetic modifications of the DNA itself, the histone proteins associated with the DNA in the chromatin, non-coding RNA or the modifications of the transcribed RNA. These modifications, also known as epigenetic code, do not change the DNA sequence but alter the expression level of specific genes. Microorganisms seem to have learned how to modify the host epigenetic code and modulate the host transcriptome in their favour. In this review, we explore the literature that describes the epigenetic interaction of bacteria, fungi and viruses, with their mammalian hosts.
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16
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Tarashi S, Karimipoor M, Siadat SD, Fuso A. Epigenetic modifications in host-bacterial dialogues: more than meets the eye. Epigenomics 2021; 14:5-9. [PMID: 34676788 DOI: 10.2217/epi-2021-0375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Samira Tarashi
- Microbiology Research Center, Pasteur Institute of Iran, Tehran, 13169-43551, Iran.,Mycobacteriology & Pulmonary Research Department, Pasteur Institute of Iran, Tehran, 13169-43551, Iran
| | - Morteza Karimipoor
- Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, 13169-43551, Iran
| | - Seyed Davar Siadat
- Microbiology Research Center, Pasteur Institute of Iran, Tehran, 13169-43551, Iran.,Mycobacteriology & Pulmonary Research Department, Pasteur Institute of Iran, Tehran, 13169-43551, Iran
| | - Andrea Fuso
- Department of Experimental Medicine, Sapienza University of Rome, 00161, Italy
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17
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Eskew EA, Fraser D, Vonhof MJ, Pinsky ML, Maslo B. Host gene expression in wildlife disease: making sense of species-level responses. Mol Ecol 2021; 30:6517-6530. [PMID: 34516689 DOI: 10.1111/mec.16172] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 08/16/2021] [Accepted: 08/31/2021] [Indexed: 12/11/2022]
Abstract
Emerging infectious diseases are significant threats to wildlife conservation, yet the impacts of pathogen exposure and infection can vary widely among host species. As such, conservation biologists and disease ecologists have increasingly aimed to understand species-specific host susceptibility using molecular methods. In particular, comparative gene expression assays have been used to contrast the transcriptomic responses of disease-resistant and disease-susceptible hosts to pathogen exposure. This work usually assumes that the gene expression responses of disease-resistant species will reveal the activation of molecular pathways contributing to host defence. However, results often show that disease-resistant hosts undergo little gene expression change following pathogen challenge. Here, we discuss the mechanistic implications of these "null" findings and offer methodological suggestions for future molecular studies of wildlife disease. First, we highlight that muted transcriptomic responses with minimal immune system recruitment may indeed be protective for nonsusceptible hosts if they limit immunopathology and promote pathogen tolerance in systems where susceptible hosts suffer from genetic dysregulation. Second, we argue that overly narrow investigation of responses to pathogen exposure may overlook important, constitutively active molecular pathways that underlie species-specific defences. Finally, we outline alternative study designs and approaches that complement interspecific transcriptomic comparisons, including intraspecific gene expression studies and genomic methods to detect signatures of selection. Collectively, these insights will help ecologists extract maximal information from conservation-relevant transcriptomic data sets, leading to a deeper understanding of host defences and, ultimately, the implementation of successful conservation interventions.
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Affiliation(s)
- Evan A Eskew
- Department of Ecology, Evolution and Natural Resources, Rutgers, The State University of New Jersey, New Brunswick, New Jersey, USA.,Department of Biology, Pacific Lutheran University, Tacoma, Washington, USA
| | - Devaughn Fraser
- Wildlife Genetics Research Laboratory, California Department of Fish and Wildlife, Sacramento, California, USA
| | - Maarten J Vonhof
- Department of Biological Sciences, Western Michigan University, Kalamazoo, Michigan, USA
| | - Malin L Pinsky
- Department of Ecology, Evolution and Natural Resources, Rutgers, The State University of New Jersey, New Brunswick, New Jersey, USA
| | - Brooke Maslo
- Department of Ecology, Evolution and Natural Resources, Rutgers, The State University of New Jersey, New Brunswick, New Jersey, USA
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18
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Rodríguez-Carlos A, Jacobo-Delgado YM, Santos-Mena AO, Rivas-Santiago B. Modulation of cathelicidin and defensins by histone deacetylase inhibitors: A potential treatment for multi-drug resistant infectious diseases. Peptides 2021; 140:170527. [PMID: 33744370 DOI: 10.1016/j.peptides.2021.170527] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/26/2021] [Accepted: 03/09/2021] [Indexed: 12/12/2022]
Abstract
Infectious diseases are an important growing public health problem, which perspective has worsened due to the increasing number of drug-resistant strains in the last few years. Although diverse solutions have been proposed, one viable solution could be the use of immune system modulators. The induction of the immune response can be increased by histone deacetylase inhibitors (iHDAC), which in turn modulate the chromatin and increase the activation of different cellular pathways and nuclear factors such as STAT3, HIF-1α NF-kB, C/EBPα and, AP-1. These pathways are capable to promote several immune response-related molecules including those with antimicrobial properties such as antimicrobial peptides (AMPs) that lead to the elimination of pathogens including multi drug-resistant strains.
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Affiliation(s)
- Adrián Rodríguez-Carlos
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | | | - Alan O Santos-Mena
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico
| | - Bruno Rivas-Santiago
- Medical Research Unit-Zacatecas, Mexican Institute for Social Security-IMSS, Zacatecas, Mexico.
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19
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Rajeev R, Dwivedi AP, Sinha A, Agarwaal V, Dev RR, Kar A, Khosla S. Epigenetic interaction of microbes with their mammalian hosts. J Biosci 2021; 46:94. [PMID: 34728591 PMCID: PMC8550911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The interaction of microbiota with its host has the ability to alter the cellular functions of both, through several mechanisms. Recent work, from many laboratories including our own, has shown that epigenetic mechanisms play an important role in the alteration of these cellular functions. Epigenetics broadly refers to change in the phenotype without a corresponding change in the DNA sequence. This change is usually brought by epigenetic modifications of the DNA itself, the histone proteins associated with the DNA in the chromatin, non-coding RNA or the modifications of the transcribed RNA. These modifications, also known as epigenetic code, do not change the DNA sequence but alter the expression level of specific genes. Microorganisms seem to have learned how to modify the host epigenetic code and modulate the host transcriptome in their favour. In this review, we explore the literature that describes the epigenetic interaction of bacteria, fungi and viruses, with their mammalian hosts.
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Affiliation(s)
- Ramisetti Rajeev
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India ,grid.411639.80000 0001 0571 5193Graduate Studies, Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Ambey Prasad Dwivedi
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India ,grid.411639.80000 0001 0571 5193Graduate Studies, Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Anunay Sinha
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India ,grid.502122.60000 0004 1774 5631Graduate Studies, Regional Centre for Biotechnology (RCB), Faridabad, India
| | - Viplove Agarwaal
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India
| | - Rachana Roshan Dev
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India
| | - Anjana Kar
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India
| | - Sanjeev Khosla
- grid.145749.a0000 0004 1767 2735Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India ,grid.417641.10000 0004 0504 3165Institute of Microbial Technology (IMTech), Chandigarh, India
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20
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Phan J, Ranjbar S, Kagawa M, Gargus M, Hochbaum AI, Whiteson KL. Thriving Under Stress: Pseudomonas aeruginosa Outcompetes the Background Polymicrobial Community Under Treatment Conditions in a Novel Chronic Wound Model. Front Cell Infect Microbiol 2020; 10:569685. [PMID: 33123495 PMCID: PMC7573134 DOI: 10.3389/fcimb.2020.569685] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/03/2020] [Indexed: 11/13/2022] Open
Abstract
In vitro infection models are important for studying the effects of antimicrobials on microbial growth and metabolism. However, many models lack important biological components that resemble the polymicrobial nature of chronic wounds or infections. In this study, we developed a perfused meat model that supports the growth of the human pathogen Pseudomonas aeruginosa in a native meat microbial background to investigate the impact of antibiotics and hydrogen peroxide on polymicrobial community growth and metabolism. P. aeruginosa plays an important role as an etiological agent involved in chronic infections and is a common opportunistic pathogen. Chemical stressors in the form of hydrogen peroxide, carbenicillin, and gentamicin were perfused through the meat with polymicrobial growth on the surface. The relative abundances of P. aeruginosa and the background microbial community were analyzed by cell viability assays, and metabolic changes of the entire community in response to different antimicrobial treatments were characterized by GC-MS analysis of volatile organic compounds. The meat background community was characterized by amplicon sequencing. Relative densities of P. aeruginosa and background microbiota were similar under control conditions. Antimicrobial stressors, even at sub-inhibitory, physiologically relevant concentrations, spurred P. aeruginosa dominance of the meat surface community. Volatile metabolite ion intensity levels showed that antibacterial treatments drive changes in microbial metabolism. The abundance of the P. aeruginosa-derived metabolite, acetophenone, remained stable with treatment, whereas the relative abundances of 2-butanone, 2-nonanone, and 2-aminoacetophenone changed in response to treatment, suggesting these could serve as biomarkers of infection. Our model recapitulates some of the physiological conditions of chronic wounds and facilitates high throughput experiments without the high cost of in vivo models. Expanded use of this perfusion model will contribute to the understanding of polymicrobial growth and metabolism in the context of chronic wounds and infections.
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Affiliation(s)
- Joann Phan
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Saba Ranjbar
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States
| | - Miki Kagawa
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Matthew Gargus
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Allon Israel Hochbaum
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States.,Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States.,Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA, United States.,Department of Chemistry, University of California, Irvine, Irvine, CA, United States
| | - Katrine L Whiteson
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
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21
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Dong W, Cai Y, Xu Z, Fu B, Chen Q, Cui Y, Ruan Z, Liang Y, Peng N, Zhao S. Heterologous expression of AHL lactonase AiiK by Lactobacillus casei MCJΔ1 with great quorum quenching ability against Aeromonas hydrophila AH-1 and AH-4. Microb Cell Fact 2020; 19:191. [PMID: 33028330 PMCID: PMC7542731 DOI: 10.1186/s12934-020-01448-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 09/25/2020] [Indexed: 11/20/2022] Open
Abstract
Background Nowadays, microbial infections have caused increasing economic losses in aquaculture industry and deteriorated worldwide environments. Many of these infections are caused by opportunistic pathogens through cell-density mediated quorum sensing (QS). The disruption of QS, known as quorum quenching (QQ), is an effective and promising way to prevent and control pathogens, driving it be the potential bio-control agents. In our previous studies, AHL lactonase AiiK was identified with many characteristics, and constitutive expression vector pELX1 was constructed to express heterologous proteins in Lactobacillus casei MCJΔ1 (L. casei MCJΔ1). In this study, recombinant strain pELCW-aiiK/L. casei MCJΔ1 (LcAiiK) and wild-type Aeromonas hydrophila (A. hydrophila) were co-cultured to test the QQ ability of LcAiiK against A. hydrophila. Results A cell wall-associated expression vector pELCW for L. casei MCJΔ1 was constructed. Localization assays revealed that the expressed AiiK was anchored at the surface layer of LcAiiK via vector pELCW-aiiK. LcAiiK (OD600 = 0.5) degraded 24.13 μM of C6-HSL at 2 h, 40.99 μM of C6-HSL at 12 h, and 46.63 μM of C6-HSL at 24 h. Over 50% LcAiiK cells maintained the pELCW-aiiK plasmid after 15 generations of cultivation without erythromycin. Furthermore, LcAiiK inhibited the swimming motility, extracellular proteolytic activity, haemolytic activity and biofilm formation of A. hydrophila AH-1 and AH-4. Conclusion The AHL lactonase AiiK is firstly and constitutively expressed at the surface layer of L. casei MCJΔ1. LcAiiK displayed considerable AHL lactonase activity and great QQ abilities against A. hydrophila AH-1 and AH-4 by attenuating their QS processes instead of killing them. Therefore, the LcAiiK can be exploited as an anti-pathogenic drug or a bio-control agent to control the AHL-mediated QS of pathogenic bacteria.
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Affiliation(s)
- Weiwei Dong
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuyuan Cai
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhilong Xu
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Biao Fu
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qitong Chen
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yuxin Cui
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhiyong Ruan
- Institute of Agricultural Resources and Regional Planning, CAAS, Beijing, 100081, China
| | - Yunxiang Liang
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Nan Peng
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Shumiao Zhao
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
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22
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Mei HX, Chen YL, Shi PL, Yang SR, Xu X, He JZ. [Advances in oral bacteria influencing host epigenetic regulation]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2020; 38:583-588. [PMID: 33085246 DOI: 10.7518/hxkq.2020.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Epigenetics refers to a steady change in the level of gene expression caused by non-DNA sequence changes. Microbes can modulate host inflammation through epigenetic pathways to evade or expend immune responses. As an important part of human microbes, oral bacteria also have various epigenetic regulation mechanisms to affect host inflammatory responses. This article reviews the common pathways of epigenetic regulation in microbe infection and the regulation of host epigenetics by using oral microbes to provide a reference for the study of epigenetic-related mechanisms in oral diseases.
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Affiliation(s)
- Hong-Xiang Mei
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Yi-Lin Chen
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Pei-Lei Shi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Si-Rui Yang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xin Xu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jin-Zhi He
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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23
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Peignier A, Parker D. Trained immunity and host-pathogen interactions. Cell Microbiol 2020; 22:e13261. [PMID: 32902895 DOI: 10.1111/cmi.13261] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 02/07/2023]
Abstract
Infectious diseases are a leading cause of death worldwide with over 8 million fatalities accounted for in 2016. Solicitation of host immune defenses by vaccination is the treatment of choice to prevent these infections. It has long been thought that vaccine immunity was solely mediated by the adaptive immune system. However, over the past decade, numerous studies have shown that innate immune cells can also retain memory of these encounters. This process, called innate immune memory, is mediated by metabolic and epigenetic changes that make cells either hyperresponsive (trained immunity) or hyporesponsive (tolerance) to subsequent challenges. In this review, we discuss the concepts of trained immunity and tolerance in the context of host-pathogen interactions.
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Affiliation(s)
- Adeline Peignier
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Dane Parker
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey, USA
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24
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Bannister S, Messina NL, Novakovic B, Curtis N. The emerging role of epigenetics in the immune response to vaccination and infection: a systematic review. Epigenetics 2020; 15:555-593. [PMID: 31914857 PMCID: PMC7574386 DOI: 10.1080/15592294.2020.1712814] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 12/20/2019] [Indexed: 12/14/2022] Open
Abstract
Extensive research has highlighted the role of infection-induced epigenetic events in the development of cancer. More recently, attention has focused on the ability of non-carcinogenic infections, as well as vaccines, to modify the human epigenome and modulate the immune response. This review explores this rapidly evolving area of investigation and outlines the many and varied ways in which vaccination and natural infection can influence the human epigenome from modulation of the innate and adaptive immune response, to biological ageing and modification of disease risk. The implications of these epigenetic changes on immune regulation and their potential application to the diagnosis and treatment of chronic infection and vaccine development are also discussed.
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Affiliation(s)
- Samantha Bannister
- Department of Paediatrics, The University of Melbourne, Parkville, Australia
- Infectious Diseases Research Group, Murdoch Children’s Research Institute, Parkville, Australia
- Infectious Diseases Unit, Royal Children’s Hospital Melbourne, Parkville, Australia
| | - Nicole L. Messina
- Department of Paediatrics, The University of Melbourne, Parkville, Australia
- Infectious Diseases Research Group, Murdoch Children’s Research Institute, Parkville, Australia
| | - Boris Novakovic
- Department of Paediatrics, The University of Melbourne, Parkville, Australia
- Epigenetics Research Group, Murdoch Children’s Research Institute, Parkville, Australia
| | - Nigel Curtis
- Department of Paediatrics, The University of Melbourne, Parkville, Australia
- Infectious Diseases Research Group, Murdoch Children’s Research Institute, Parkville, Australia
- Infectious Diseases Unit, Royal Children’s Hospital Melbourne, Parkville, Australia
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25
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Denzer L, Schroten H, Schwerk C. From Gene to Protein-How Bacterial Virulence Factors Manipulate Host Gene Expression During Infection. Int J Mol Sci 2020; 21:ijms21103730. [PMID: 32466312 PMCID: PMC7279228 DOI: 10.3390/ijms21103730] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 02/06/2023] Open
Abstract
Bacteria evolved many strategies to survive and persist within host cells. Secretion of bacterial effectors enables bacteria not only to enter the host cell but also to manipulate host gene expression to circumvent clearance by the host immune response. Some effectors were also shown to evade the nucleus to manipulate epigenetic processes as well as transcription and mRNA procession and are therefore classified as nucleomodulins. Others were shown to interfere downstream with gene expression at the level of mRNA stability, favoring either mRNA stabilization or mRNA degradation, translation or protein stability, including mechanisms of protein activation and degradation. Finally, manipulation of innate immune signaling and nutrient supply creates a replicative niche that enables bacterial intracellular persistence and survival. In this review, we want to highlight the divergent strategies applied by intracellular bacteria to evade host immune responses through subversion of host gene expression via bacterial effectors. Since these virulence proteins mimic host cell enzymes or own novel enzymatic functions, characterizing their properties could help to understand the complex interactions between host and pathogen during infections. Additionally, these insights could propose potential targets for medical therapy.
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26
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Crimi E, Benincasa G, Cirri S, Mutesi R, Faenza M, Napoli C. Clinical epigenetics and multidrug-resistant bacterial infections: host remodelling in critical illness. Epigenetics 2020; 15:1021-1034. [PMID: 32290755 DOI: 10.1080/15592294.2020.1748918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The inappropriate use of antibiotics in man is driving to insurgence of pathogenic bacteria resistant to multiple drugs (MDR) representing a challenge in critical illness. The interaction of MDR bacteria with host cells can guide molecular perturbations of host transcriptional programmes involving epigenetic-sensitive mechanisms, mainly DNA methylation, histone modifications, and non-coding RNAs leading to pathogen survival. Clinical evidence of epigenetic manipulation from MDR bacteria mainly arises from Mycobacterium tuberculosis as well as Helicobacter pylori, Escherichia coli, Listeria monocytogenes, Pseudomonas aeruginosa, and Legionella pneumophila infection suggesting possible biomarkers of disease. For example, DNA hypermethylation of E-cadherin (CDH1), upstream transcription factor 1/2 (USF1/2), WW domain containing oxidoreductase (WWOX), and mutL homolog 1 (MLH1) genes in gastric mucosa is correlated with malignancy suggesting useful biomarkers of early disease state. Moreover, upregulated circulating miR-361-5p, miR-889, miR-576-3p may be useful biomarkers to discriminate tuberculosis patients. Moreover, Listeria monocytogenes can indirectly induce H3 hyperacetylation leading to inflammation in human endothelial cells whereas Pseudomonas aeruginosa excretes QS 2-AA to directly induce H3 deacetylation leading to bacterial persistence in human monocytes. Remarkably, epigenetic-sensitive drugs may aid to counteract MDR in clinical setting. Trichostatin A, a histone deacetyltransferase inhibitor (HDACi), leads to AMP β-defensin 2 (HBD2) gene up-regulation in human epithelial cells suggesting a useful 'epi-therapy' for Escherichia coli-induced intestinal diseases. We update on the most current clinical studies focusing on epigenetic changes involved in bacterial-host interactions and their putative role as biomarkers or drug targets to improve precision medicine and personalized therapy in critical illness and transplantation setting.
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Affiliation(s)
- Ettore Crimi
- College of Medicine, University of Central Florida , Orlando, FL, USA.,Department of Anesthesiology and Critical Care Medicine, Ocala Health , Ocala, FL, USA
| | - Giuditta Benincasa
- Clinical Department of Internal Medicine and Specialistics, Department of Advanced Clinical and Surgical Sciences, University of Campania "Luigi Vanvitelli" , Naples, Italy
| | - Silvia Cirri
- Division of Anesthesiology and Intensive Care, Cardiothoracic Department, Istituto Clinico Sant'Ambrogio, Gruppo Ospedaliero San Donato , Milan, Italy
| | - Rebecca Mutesi
- College of Medicine, University of Central Florida , Orlando, FL, USA
| | - Mario Faenza
- Multidisciplinary Department of Medical and Dental Specialties, Plastic Surgery Unit, University of Campania "Luigi Vanvitelli" , Naples, Italy
| | - Claudio Napoli
- Clinical Department of Internal Medicine and Specialistics, Department of Advanced Clinical and Surgical Sciences, University of Campania "Luigi Vanvitelli" , Naples, Italy.,IRCCS Foundation SDN , Naples, Italy
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27
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Kitao T. [Molecular biological studies toward controlling infectious diseases caused by multidrug-resistant Pseudomonas aeruginosa]. Nihon Saikingaku Zasshi 2020; 74:177-189. [PMID: 31902822 DOI: 10.3412/jsb.74.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Pseudomonas aeruginosa is an opportunistic Gram-negative pathogen that causes serious acute, persistent, and relapsing infections. Recent year, the effectiveness of antibiotics for eliminating P. aeruginosa infections has been further complicated by the emergence of multidrug-resistant strains. Thus, new approaches for the rapid detection and novel antimicrobial drug discovery are urgently needed to control such intractable infections caused by the pathogen. Also, we do need deep understanding of the drug resistance mechanisms to overcome this issue. Here I describe a brief review on my biological studies toward controlling infectious diseases caused by multidrug-resistant P. aeruginosa.
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Affiliation(s)
- Tomoe Kitao
- Department of Microbiology, Graduate School of Medicine, Gifu University
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28
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Pseudomonas aeruginosa Quorum Sensing Molecule Alters Skeletal Muscle Protein Homeostasis by Perturbing the Antioxidant Defense System. mBio 2019; 10:mBio.02211-19. [PMID: 31575771 PMCID: PMC6775459 DOI: 10.1128/mbio.02211-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Skeletal muscle function is compromised in many illnesses, including chronic infections. The Pseudomonas aeruginosa quorum sensing (QS) signal, 2-amino acetophenone (2-AA), is produced during acute and chronic infections and excreted in human tissues, including the lungs of cystic fibrosis patients. We have shown that 2-AA facilitates pathogen persistence, likely via its ability to promote the formation of bacterial persister cells, and that it acts as an interkingdom immunomodulatory signal that epigenetically reprograms innate immune functions. Moreover, 2-AA compromises muscle contractility and impacts the expression of genes involved in reactive oxygen species (ROS) homeostasis in skeletal muscle and in mitochondrial functions. Here, we elucidate the molecular mechanisms of 2-AA's impairment of skeletal muscle function and ROS homeostasis. Murine in vivo and differentiated C2C12 myotube cell studies showed that 2-AA promotes ROS generation in skeletal muscle via the modulation of xanthine oxidase (XO) activity, NAD(P)H oxidase2 (NOX2) protein level, and the activity of antioxidant enzymes. ROS accumulation triggers the activity of AMP-activated protein kinase (AMPK), likely upstream of the observed locations of induction of ubiquitin ligases Muscle RING Finger 1 (MuRF1) and Muscle Atrophy F-box (MAFbx), and induces autophagy-related proteins. The protein-level perturbation in skeletal muscle of silent mating type information regulation 2 homolog 1 (SIRT1), peroxisome proliferator-activated receptor gamma coactivator 1 (PGC-1), and uncoupling protein 3 (UCP3) is rescued by the antioxidant N-acetyl-l-cysteine (NAC). Together, these results unveil a novel form of action of a QS bacterial molecule and provide molecular insights into the 2-AA-mediated skeletal muscle dysfunction caused by P. aeruginosa IMPORTANCE Pseudomonas aeruginosa, a bacterium that is resistant to treatment, causes serious acute, persistent, and relapsing infections in humans. There is increasing evidence that bacterial excreted small molecules play a critical role during infection. We have shown that a quorum sensing (QS)-regulated excreted small molecule, 2-AA, which is abundantly produced by P. aeruginosa, promotes persistent infections, dampens host inflammation, and triggers mitochondrial dysfunction in skeletal muscle. QS is a cell-to-cell communication system utilized by bacteria to promote collective behaviors. The significance of our study in identifying a mechanism that leads to skeletal muscle dysfunction, via the action of a QS molecule, is that it may open new avenues in the control of muscle loss as a result of infection and sepsis. Given that QS is a common characteristic of prokaryotes, it is possible that 2-AA-like molecules promoting similar effects may exist in other pathogens.
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29
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Maurice NM, Bedi B, Sadikot RT. Pseudomonas aeruginosa Biofilms: Host Response and Clinical Implications in Lung Infections. Am J Respir Cell Mol Biol 2019; 58:428-439. [PMID: 29372812 DOI: 10.1165/rcmb.2017-0321tr] [Citation(s) in RCA: 196] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Pseudomonas aeruginosa is a major health challenge that causes recalcitrant multidrug-resistant infections, especially in immunocompromised and hospitalized patients. P. aeruginosa is an important cause of nosocomial and ventilator-associated pneumonia characterized by high prevalence and fatality rates. P. aeruginosa also causes chronic lung infections in individuals with cystic fibrosis. Multidrug- and totally drug-resistant strains of P. aeruginosa are increasing threats that contribute to high mortality in these patients. The pathogenesis of many P. aeruginosa infections depends on its ability to form biofilms, structured bacterial communities that can coat mucosal surfaces or invasive devices. These biofilms make conditions more favorable for bacterial persistence, as embedded bacteria are inherently more difficult to eradicate than planktonic bacteria. The molecular mechanisms that underlie P. aeruginosa biofilm pathogenesis and the host response to P. aeruginosa biofilms remain to be fully defined. However, it is known that biofilms offer protection from the host immune response and are also extremely recalcitrant to antimicrobial therapy. Therefore, development of novel therapeutic strategies specifically aimed at biofilms is urgently needed. Here, we review the host response, key clinical implications of P. aeruginosa biofilms, and novel therapeutic approaches to treat biofilms relevant to lung infections. Greater understanding of P. aeruginosa biofilms will elucidate novel avenues to improve outcomes for P. aeruginosa pulmonary infections.
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Affiliation(s)
- Nicholas M Maurice
- 1 Atlanta Veterans Affairs Medical Center, Decatur, Georgia; and.,2 Department of Medicine Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Emory University, Atlanta, Georgia
| | - Brahmchetna Bedi
- 1 Atlanta Veterans Affairs Medical Center, Decatur, Georgia; and
| | - Ruxana T Sadikot
- 1 Atlanta Veterans Affairs Medical Center, Decatur, Georgia; and.,2 Department of Medicine Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Emory University, Atlanta, Georgia
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30
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Abstract
ABSTRACT
Successful bacterial colonizers and pathogens have evolved with their hosts and have acquired mechanisms to customize essential processes that benefit their lifestyle. In large part, bacterial survival hinges on shaping the transcriptional signature of the host, a process regulated at the chromatin level. Modifications of chromatin, either on histone proteins or on DNA itself, are common targets during bacterium-host cross talk and are the focus of this article.
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31
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Caixia L, Yang X, Yurong T, Xiaoqun Q. Involvement of epigenetic modification in epithelial immune responses during respiratory syncytial virus infection. Microb Pathog 2019; 130:186-189. [PMID: 30890452 DOI: 10.1016/j.micpath.2019.03.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 01/25/2023]
Abstract
The epithelial cells of bronchi (BECs) act as a protective wall against potential pathogens and foreign particles that controls many aspects of respiratory immune response. The BECs act as not only a physical protecting wall of the airways but also as a significant part of both the innate and adaptive immune responses. Many kind of epithelium-associated communicating pathways which are triggered by genetic and environmental causating agents get involved in development of respiratory tract abnormalities. Epigenetic dysregulation is one potential mechanism which may mediate between adverse in early life exposures such as severe infections and immunological function deficits in later life. Epigenetic factors which regulate the respiratory tract lining structure and role are also an attractive area to assess the susceptibility of respiratory tract diseases. Several studies show that the key genes in epithelium-related signaling pathways have epigenetic modifications. The interactions mediating the relationship between severe bronchiolitis caused by RSV and their adverse consequences in childhood are broadly understood as immunological in nature, however, are yet to be fully uncovered. Thus, our study explained the immune action of epithelium and RSV-triggered immune imbalance of epithelium through epigenetic modifications in the mechanism of airway hyperresponsiveness.
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Affiliation(s)
- Liu Caixia
- From Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, 410078, Hunan, China
| | - Xiang Yang
- From Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, 410078, Hunan, China
| | - Tan Yurong
- From Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, 410078, Hunan, China; From Department of Basic Medicine, Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.
| | - Qin Xiaoqun
- From Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, 410078, Hunan, China
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32
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Zhang J, Wang J, Feng T, Du R, Tian X, Wang Y, Zhang XH. Heterologous Expression of the Marine-Derived Quorum Quenching Enzyme MomL Can Expand the Antibacterial Spectrum of Bacillus brevis. Mar Drugs 2019; 17:E128. [PMID: 30795579 PMCID: PMC6409708 DOI: 10.3390/md17020128] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/14/2019] [Accepted: 02/18/2019] [Indexed: 12/28/2022] Open
Abstract
Quorum sensing (QS) is closely associated with the production of multiple virulence factors in bacterial pathogens. N-acyl homoserine lactones (AHLs) are important QS signal molecules that modulate the virulence of gram-negative pathogenic bacteria. Enzymatic degradation of AHLs to interrupt QS, termed quorum quenching (QQ), has been considered a novel strategy for reduction of pathogenicity and prevention of bacterial disease. However, the low expression levels of QQ proteins in the original host bacteria has affected the applications of these proteins. Previously, we identified a novel marine QQ enzyme, named MomL, with high activity and promising biocontrol function. In this study, we linked the target fragment momL to pNCMO2, which provided a basis for the first heterologous expression of MomL in the antifungal and anti-gram-positive-bacteria biocontrol strain Bacillus brevis, and obtaining the recombinant strain named BbMomL. The QQ activity of BbMomL was confirmed using a series of bioassays. BbMomL could not only degrade the exogenous signal molecule C6-HSL, but also the AHL signal molecules produced by the gram-negative pathogens Pectobacterium carotovorum subsp. carotovorum (Pcc) and Pseudomonas aeruginosa PAO1. In addition, BbMomL significantly reduced the secretion of pathogenic factors and the pathogenicity of Pcc and P. aeruginosa PAO1. We tested the biocontrol function of BbMomL for prevention of plant diseases in vitro. The result indicates that BbMomL has a broad antibacterial spectrum. Compared with wild-type B. brevis, BbMomL not only inhibited fungi and gram-positive bacterial pathogens but also considerably inhibited gram-negative bacterial pathogens. Moreover, the Bacillus brevis expression system has good application prospects and is an ideal host for expression and secretion of foreign proteins.
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Affiliation(s)
- Jingjing Zhang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
| | - Jiayi Wang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
| | - Tao Feng
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
| | - Rui Du
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
| | - Xiaorong Tian
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
| | - Yan Wang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
- Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
| | - Xiao-Hua Zhang
- MOE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
- Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
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33
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Martins R, Carlos AR, Braza F, Thompson JA, Bastos-Amador P, Ramos S, Soares MP. Disease Tolerance as an Inherent Component of Immunity. Annu Rev Immunol 2019; 37:405-437. [PMID: 30673535 DOI: 10.1146/annurev-immunol-042718-041739] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Pathogenic organisms exert a negative impact on host health, revealed by the clinical signs of infectious diseases. Immunity limits the severity of infectious diseases through resistance mechanisms that sense and target pathogens for containment, killing, or expulsion. These resistance mechanisms are viewed as the prevailing function of immunity. Under pathophysiologic conditions, however, immunity arises in response to infections that carry health and fitness costs to the host. Therefore, additional defense mechanisms are required to limit these costs, before immunity becomes operational as well as thereafter to avoid immunopathology. These are tissue damage control mechanisms that adjust the metabolic output of host tissues to different forms of stress and damage associated with infection. Disease tolerance is the term used to define this defense strategy, which does not exert a direct impact on pathogens but is essential to limit the health and fitness costs of infection. Under this argument, we propose that disease tolerance is an inherent component of immunity.
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Affiliation(s)
- Rui Martins
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal;
| | | | - Faouzi Braza
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal;
| | | | | | - Susana Ramos
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal;
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34
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Calegari-Silva TC, Vivarini ÁC, Pereira RDMS, Dias-Teixeira KL, Rath CT, Pacheco ASS, Silva GBL, Pinto CAS, Dos Santos JV, Saliba AM, Corbett CEP, de Castro Gomes CM, Fasel N, Lopes UG. Leishmania amazonensis downregulates macrophage iNOS expression via Histone Deacetylase 1 (HDAC1): a novel parasite evasion mechanism. Eur J Immunol 2018; 48:1188-1198. [PMID: 29645094 DOI: 10.1002/eji.201747257] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 02/16/2018] [Accepted: 03/29/2018] [Indexed: 12/11/2022]
Abstract
The induced expression of nitric oxide synthase (iNOS) controls the intracellular growth of Leishmania in infected macrophages. Histones deacetylases (HDACs) negatively regulate gene expression through the formation of complexes containing transcription factors such as NF-κB p50/50. Herein, we demonstrated the occupancy of p50/p50_HDAC1 to iNOS promoter associated with reduced levels of H3K9Ac. Remarkably, we found increased levels of HDAC1 in L. amazonensis-infected macrophages. HDAC1 upregulation was not found in L. major-infected macrophages. The parasite intracellular load was reduced in HDAC1 knocked-down macrophages, which presented increased nitric oxide levels. HDAC1 silencing led to the occupancy of CBP/p300 to iNOS promoter and the rise of H3K9Ac modification. Importantly, the immunostaining of skin samples from hiporeactive cutaneous leishmaniasis patients infected with L. amazonensis, revealed high levels of HDAC1. In brief, L. amazonensis induces HDAC1 in infected macrophages, which contribute to parasite survival and is associated to hiporeactive stage found in L. amazonensis infected patients.
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Affiliation(s)
- Teresa C Calegari-Silva
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Áislan C Vivarini
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Renata de M S Pereira
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Karina L Dias-Teixeira
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Carolina T Rath
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Amanda S S Pacheco
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Gabrielle B L Silva
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Charlene A S Pinto
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - José V Dos Santos
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
| | - Alessandra M Saliba
- Departamento de Microbiologia e Parasitologia, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Brazil
| | - Carlos E P Corbett
- Departamento de Patologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | | | - Nicolas Fasel
- Departamento of Biochemistry, University of Lausanne, Epalinges, Switzerland
| | - Ulisses G Lopes
- Laboratório de Parasitologia Molecular, Instituto de Biofísica Carlos Chagas Filho, CCS, UFRJ, Rio de Janeiro, RJ, Brazil
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35
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Clatworthy AE, Romano KP, Hung DT. Whole-organism phenotypic screening for anti-infectives promoting host health. Nat Chem Biol 2018; 14:331-341. [PMID: 29556098 PMCID: PMC9843822 DOI: 10.1038/s41589-018-0018-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 11/20/2017] [Indexed: 01/19/2023]
Abstract
To date, antibiotics have been identified on the basis of their ability to kill bacteria or inhibit their growth rather than directly for their capacity to improve clinical outcomes of infected patients. Although historically successful, this approach has led to the development of an antibiotic armamentarium that suffers from a number of shortcomings, including the inevitable emergence of resistance and, in certain infections, suboptimal efficacy leading to long treatment durations, infection recurrence, or high mortality and morbidity rates despite apparent bacterial sterilization. Conventional antibiotics fail to address the complexities of in vivo bacterial physiology and virulence, as well as the role of the host underlying the complex, dynamic interactions that cause disease. New interventions are needed, aimed at host outcome rather than microbiological cure. Here we review the role of screening models for cellular and whole-organism infection, including worms, flies, zebrafish, and mice, to identify novel therapeutic strategies and discuss their future implications.
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Affiliation(s)
- Anne E. Clatworthy
- Broad Institute of MIT and Harvard, Cambridge, MA, USA,Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA, USA,Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Keith P. Romano
- Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA, USA,Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Boston, MA, USA
| | - Deborah T. Hung
- Broad Institute of MIT and Harvard, Cambridge, MA, USA,Department of Molecular Biology and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA, USA,Department of Genetics, Harvard Medical School, Boston, MA, USA,Correspondence and requests for materials should be addressed to D.T.H.
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36
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Molecular Insights into Function and Competitive Inhibition of Pseudomonas aeruginosa Multiple Virulence Factor Regulator. mBio 2018; 9:mBio.02158-17. [PMID: 29339431 PMCID: PMC5770554 DOI: 10.1128/mbio.02158-17] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
New approaches to antimicrobial drug discovery are urgently needed to combat intractable infections caused by multidrug-resistant (MDR) bacteria. Multiple virulence factor regulator (MvfR or PqsR), a Pseudomonas aeruginosa quorum sensing transcription factor, regulates functions important in both acute and persistent infections. Recently identified non-ligand-based benzamine-benzimidazole (BB) inhibitors of MvfR suppress both acute and persistent P. aeruginosa infections in mice without perturbing bacterial growth. Here, we elucidate the crystal structure of the MvfR ligand binding domain (LBD) in complex with one potent BB inhibitor, M64. Structural analysis indicated that M64 binds, like native ligands, to the MvfR hydrophobic cavity. A hydrogen bond and pi interaction were found to be important for MvfR-M64 affinity. Surface plasmon resonance analysis demonstrated that M64 is a competitive inhibitor of MvfR. Moreover, a protein engineering approach revealed that Gln194 and Tyr258 are critical for the interaction between MvfR and M64. Random mutagenesis of the full-length MvfR protein identified a single-amino-acid substitution, I68F, at a DNA binding linker domain that confers M64 insensitivity. In the presence of M64, I68F but not the wild-type (WT) MvfR protein retained DNA binding ability. Our findings strongly suggest that M64 promotes conformational change at the DNA binding domain of MvfR and that the I68F mutation may compensate for this change, indicating allosteric inhibition. This work provides critical new insights into the molecular mechanism of MvfR function and inhibition that could aid in the optimization of anti-MvfR compounds and improve our understanding of MvfR regulation. Pseudomonas aeruginosa is an opportunistic Gram-negative pathogen that causes serious acute, persistent, and relapsing infections. New approaches to antimicrobial drug discovery are urgently needed to combat intractable infections caused by this pathogen. The Pseudomonas aeruginosa quorum sensing transcription factor MvfR regulates functions important in both acute and persistent infections. We used recently identified inhibitors of MvfR to perform structural studies and reveal important insights that would benefit the optimization of anti-MvfR compounds. Altogether, the results reported here provide critical detailed mechanistic insights into the function of MvfR domains that may benefit the optimization of the chemical, pharmacological, and safety properties of MvfR antagonist series.
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Maura D, Bandyopadhaya A, Rahme LG. Animal Models for Pseudomonas aeruginosa Quorum Sensing Studies. Methods Mol Biol 2018; 1673:227-241. [PMID: 29130177 DOI: 10.1007/978-1-4939-7309-5_18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Quorum sensing (QS) systems play global regulatory roles in bacterial virulence. They synchronize the expression of multiple virulence factors and they control and modulate bacterial antibiotic tolerance systems and host defense mechanisms. Therefore, it is important to obtain knowledge about QS modes of action and to test putative therapeutics that may interrupt QS actions in the context of infections. This chapter describes methods to study bacterial pathogenesis in murine acute and persistent/relapsing infection models, using the Gram-negative bacterial pathogen Pseudomonas aeruginosa as an example. These infection models can be used to probe bacterial virulence functions and in mechanistic studies, as well as for the assessment of the therapeutic potential of antibacterials, including anti-virulence agents.
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Affiliation(s)
- Damien Maura
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, USA.,Shriners Hospitals for Children Boston, Boston, MA, USA
| | - Arunava Bandyopadhaya
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, USA.,Shriners Hospitals for Children Boston, Boston, MA, USA
| | - Laurence G Rahme
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA. .,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, USA. .,Shriners Hospitals for Children Boston, Boston, MA, USA.
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Grabiec AM, Potempa J. Epigenetic regulation in bacterial infections: targeting histone deacetylases. Crit Rev Microbiol 2017; 44:336-350. [PMID: 28971711 DOI: 10.1080/1040841x.2017.1373063] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pathogens have developed sophisticated strategies to evade the immune response, among which manipulation of host cellular epigenetic mechanisms plays a prominent role. In the last decade, modulation of histone acetylation in host cells has emerged as an efficient strategy of bacterial immune evasion. Virulence factors and metabolic products of pathogenic microorganisms alter expression and activity of histone acetyltransferases (HATs) and histone deacetylases (HDACs) to suppress transcription of host defense genes through epigenetic changes in histone acetylation marks. This new avenue of pathogen-host interactions is particularly important in light of introduction of HDAC inhibitors into clinical practice. Considerable effort is currently being applied to better understand the effects of HDAC inhibitors on the quality of immune responses to pathogens and to characterize the therapeutic potential of these compounds in microbial infections. In this review, we will discuss the recently discovered mechanisms utilized by bacteria to facilitate their survival within infected hosts through subversion of the host acetylation system and the effects of acetylation modulators, including HDAC inhibitors and bromodomain-containing BET protein inhibitors, on innate immune responses against microbial pathogens. Integration of these two lines of experimental evidence provides critical information on the perspectives of epigenetic therapies targeting protein acetylation in infectious diseases.
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Affiliation(s)
- Aleksander M Grabiec
- a Department of Microbiology , Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University , Kraków , Poland
| | - Jan Potempa
- a Department of Microbiology , Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University , Kraków , Poland.,b Department of Oral Immunology and Infectious Diseases , University of Louisville School of Dentistry , Louisville , KY , USA
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Bandyopadhaya A, Tsurumi A, Rahme LG. NF-κBp50 and HDAC1 Interaction Is Implicated in the Host Tolerance to Infection Mediated by the Bacterial Quorum Sensing Signal 2-Aminoacetophenone. Front Microbiol 2017; 8:1211. [PMID: 28713342 PMCID: PMC5492500 DOI: 10.3389/fmicb.2017.01211] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 06/14/2017] [Indexed: 12/11/2022] Open
Abstract
Some bacterial quorum sensing (QS) small molecules are important mediators of inter-kingdom signaling and impact host immunity. The QS regulated small volatile molecule 2-aminoacetophenone (2-AA), which has been proposed as a biomarker of Pseudomonas aeruginosa colonization in chronically infected human tissues, is critically involved in “host tolerance training” that involves a distinct molecular mechanism of host chromatin regulation through histone deacetylase (HDAC)1. 2-AA’s epigenetic reprogramming action enables host tolerance to high bacterial burden and permits long-term presence of P. aeruginosa without compromising host survival. Here, to further elucidate the molecular mechanisms of 2-AA-mediated host tolerance/resilience we investigated the connection between histone acetylation status and nuclear factor (NF)-κB signaling components that together coordinate 2-AA-mediated control of transcriptional activity. We found increased NF-κBp65 acetylation levels in 2-AA stimulated cells that are preceded by association of CBP/p300 and increased histone acetyltransferase activity. In contrast, in 2-AA-tolerized cells the protein–protein interaction between p65 and CBP/p300 is disrupted and conversely, the interaction between p50 and co-repressor HDAC1 is enhanced, leading to repression of the pro-inflammatory response. These results highlight how a bacterial QS signaling molecule can establish a link between intracellular signaling and epigenetic reprogramming of pro-inflammatory mediators that may contribute to host tolerance training. These new insights might contribute to the development of novel therapeutic interventions against bacterial infections.
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Affiliation(s)
- Arunava Bandyopadhaya
- Department of Surgery, Massachusetts General Hospital and Harvard Medical School, BostonMA, United States.,Department of Microbiology and Immunobiology, Harvard Medical School, BostonMA, United States.,Shriners Hospitals for Children Boston, BostonMA, United States
| | - Amy Tsurumi
- Department of Surgery, Massachusetts General Hospital and Harvard Medical School, BostonMA, United States.,Department of Microbiology and Immunobiology, Harvard Medical School, BostonMA, United States.,Shriners Hospitals for Children Boston, BostonMA, United States
| | - Laurence G Rahme
- Department of Surgery, Massachusetts General Hospital and Harvard Medical School, BostonMA, United States.,Department of Microbiology and Immunobiology, Harvard Medical School, BostonMA, United States.,Shriners Hospitals for Children Boston, BostonMA, United States
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Maura D, Drees SL, Bandyopadhaya A, Kitao T, Negri M, Starkey M, Lesic B, Milot S, Déziel E, Zahler R, Pucci M, Felici A, Fetzner S, Lépine F, Rahme LG. Polypharmacology Approaches against the Pseudomonas aeruginosa MvfR Regulon and Their Application in Blocking Virulence and Antibiotic Tolerance. ACS Chem Biol 2017; 12:1435-1443. [PMID: 28379691 DOI: 10.1021/acschembio.6b01139] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Pseudomonas aeruginosa is an important nosocomial pathogen that is frequently recalcitrant to available antibiotics, underlining the urgent need for alternative therapeutic options against this pathogen. Targeting virulence functions is a promising alternative strategy as it is expected to generate less-selective resistance to treatment compared to antibiotics. Capitalizing on our nonligand-based benzamide-benzimidazole (BB) core structure compounds reported to efficiently block the activity of the P. aeruginosa multiple virulence factor regulator MvfR, here we report the first class of inhibitors shown to interfere with PqsBC enzyme activity, responsible for the synthesis of the MvfR activating ligands HHQ and PQS, and the first to target simultaneously MvfR and PqsBC activity. The use of these compounds reveals that inhibiting PqsBC is sufficient to block P. aeruginosa's acute virulence functions, as the synthesis of MvfR ligands is inhibited. Our results show that MvfR remains the best target of this QS pathway, as we show that antagonists of this target block both acute and persistence-related functions. The structural properties of the compounds reported in this study provide several insights that are instrumental for the design of improved MvfR regulon inhibitors against both acute and persistent P. aeruginosa infections. Moreover, the data presented offer the possibility of a polypharmacology approach of simultaneous silencing two targets in the same pathway. Such a combined antivirulence strategy holds promise in increasing therapeutic efficacy and providing alternatives in the event of a single target's resistance development.
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Affiliation(s)
- Damien Maura
- Shriners Hospitals for Children Boston, Boston, Massachusetts 02114, United States
| | - Steffen L. Drees
- Institute
for Molecular Microbiology and Biotechnology, University of Münster, 48149 Münster, Germany
| | | | - Tomoe Kitao
- Shriners Hospitals for Children Boston, Boston, Massachusetts 02114, United States
| | | | - Melissa Starkey
- Shriners Hospitals for Children Boston, Boston, Massachusetts 02114, United States
| | - Biliana Lesic
- Shriners Hospitals for Children Boston, Boston, Massachusetts 02114, United States
| | - Sylvain Milot
- INRS Institut Armand Frappier, Laval, Quebec H7V 1B7, Canada
| | - Eric Déziel
- INRS Institut Armand Frappier, Laval, Quebec H7V 1B7, Canada
| | - Robert Zahler
- Spero Therapeutics, Cambridge, Massachusetts 02139, United States
| | - Mike Pucci
- Spero Therapeutics, Cambridge, Massachusetts 02139, United States
| | | | - Susanne Fetzner
- Institute
for Molecular Microbiology and Biotechnology, University of Münster, 48149 Münster, Germany
| | - François Lépine
- INRS Institut Armand Frappier, Laval, Quebec H7V 1B7, Canada
| | - Laurence G. Rahme
- Shriners Hospitals for Children Boston, Boston, Massachusetts 02114, United States
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Abstract
The human epigenome may link environmental exposures and commensal microbiota changes to host pathology in respect to the developmental origins of inflammatory bowel diseases (ulcerative colitis [UC] and Crohn's disease [more appropriately Crohn disease, CD]). Genetic predisposition - prenatal, perinatal and pediatric environmental influences - microbiome aberration (dysbiosis) and immune dysregulation appear to be important elements in disease development, progression and maintenance. The prevalence of combined genetic and epigenetic susceptibility toward UC and CD is calculated herein to be as high as 2%, and approximately 1% for UC and CD in highly developed countries, respectively. This review emphasizes the significant challenges for epigenetic research in inflammatory bowel diseases. Overcoming these challenges, however, could reveal unique opportunities for disease prevention, treatment and possible cure.
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Affiliation(s)
- Richard Kellermayer
- Section of Pediatric Gastroenterology, Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, USDA/ARS Children's Nutrition Research Center, Houston, TX 77030, USA
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