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Xiang SL, Xu KZ, Yin LJ, Rao Y, Wang B, Jia AQ. Dopamine, an exogenous quorum sensing signaling molecule or a modulating factor in Pseudomonas aeruginosa? Biofilm 2024; 8:100208. [PMID: 39036334 PMCID: PMC11260039 DOI: 10.1016/j.bioflm.2024.100208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/19/2024] [Accepted: 06/19/2024] [Indexed: 07/23/2024] Open
Abstract
Pseudomonas aeruginosa is recognized globally as an opportunistic pathogen of considerable concern due to its high virulence and pathogenicity, especially in immunocompromised individuals. While research has identified several endogenous quorum sensing (QS) signaling molecules that enhance the virulence and pathogenicity of P. aeruginosa, investigations on exogenous QS signaling molecules or modulating factors remain limited. This study found that dopamine serves as an exogenous QS signaling molecule or modulating factor of P. aeruginosa PAO1, enhancing the production of virulence factors and biofilms. Compared to the control group, treatment with 40 μM dopamine resulted in a 33.1 % increase in biofilm formation, 68.1 % increase in swimming mobility, 63.1 % increase in swarming mobility, 147.2 % increase in the signaling molecule 3-oxo-C12-HSL, and 50.5 %, 28.5 %, 27.0 %, and 33.2 % increases in the virulence factors alginate, rhamnolipids, protease, and pyocyanin, respectively. This study further explored the mechanism of dopamine regulating the biofilm formation and virulence of P. aeruginosa PAO1 through transcriptome and metabolome. Transcriptomic analysis showed that dopamine promoted the expression of virulence genes psl, alg, lasA, rhlABC, rml, and phz in P. aeruginosa PAO1. Metabolomic analysis revealed changes in the concentrations of tryptophan, pyruvate, ethanolamine, glycine, 3-hydroxybutyric acid, and alizarin. Furthermore, KEGG enrichment analysis of altered genes and metabolites indicated that dopamine enhanced phenylalanine, tyrosine, and tryptophan in P. aeruginosa PAO1. The results of this study will contribute to the development of novel exogenous QS signaling molecules or modulating factors and advance our understanding of the interactions between P. aeruginosa and the host environment.
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Affiliation(s)
- Shi-Liang Xiang
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, China
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Pharmaceutical Sciences, Hainan University, Haikou, 570228, China
| | - Kai-Zhong Xu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Pharmaceutical Sciences, Hainan University, Haikou, 570228, China
| | - Lu-Jun Yin
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Pharmaceutical Sciences, Hainan University, Haikou, 570228, China
| | - Yong Rao
- School of Pharmaceutical Sciences, Hainan University, Haikou, 570228, China
| | - Bo Wang
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, China
| | - Ai-Qun Jia
- Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, 570311, China
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D'Amico F, Landoni G. Protective hemodynamics: a novel strategy to manage blood pressure. Curr Opin Crit Care 2024:00075198-990000000-00208. [PMID: 39248080 DOI: 10.1097/mcc.0000000000001205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/10/2024]
Abstract
PURPOSE OF REVIEW This editorial aims to highlight the evolving concept of protective hemodynamics in the management of critically ill patients. RECENT FINDINGS Recent literature underscores the limitations of rigid blood pressure targets, particularly in the context of critical care and perioperative management. High blood pressure targets, especially when coupled with high-dose vasopressors, can lead to poor outcomes. 'Protective hemodynamics' aims to maintain cardiovascular stability while reducing risks associated with interventions. SUMMARY The implications of adopting protective hemodynamics are profound for both clinical practice and research. Clinically, this approach can reduce iatrogenic harm and improve long-term outcomes for critically ill patients. For research, it opens new avenues for investigating individualized hemodynamic management strategies that prioritize overall patient stability and long-term health over rigid target attainment.
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Affiliation(s)
- Filippo D'Amico
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute
| | - Giovanni Landoni
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
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3
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Duarte M, Pedrosa SS, Khusial PR, Madureira AR. Exploring the interplay between stress mediators and skin microbiota in shaping age-related hallmarks: A review. Mech Ageing Dev 2024; 220:111956. [PMID: 38906383 DOI: 10.1016/j.mad.2024.111956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/27/2024] [Accepted: 06/14/2024] [Indexed: 06/23/2024]
Abstract
Psychological stress is a major contributing factor to several health problems (e.g., depression, cardiovascular disease). Around 35 % of the world's population suffers from it, including younger generations. Physiologically, stress manifests through neuroendocrine pathways (Hypothalamic-Pituitary-Adrenal (HPA) axis and Sympathetic-Adrenal-Medullary (SAM) system) which culminate in the production of stress mediators like cortisol, epinephrine and norepinephrine. Stress and its mediators have been associated to body aging, through molecular mechanisms such as telomere attrition, mitochondrial dysfunction, cellular senescence, chronic inflammation, and dysbiosis, among others. Regarding its impact in the skin, stress impacts its structural integrity and physiological function. Despite this review focusing on several hallmarks of aging, emphasis was placed on skin microbiota dysbiosis. In this line, several studies, comprising different age groups, demographic contexts and body sites, have reported skin microbiota alterations associated with aging, and some effects of stress mediators on skin microbiota have also been reviewed in this paper. From a different perspective, since it is not a "traditional" stress mediator, oxytocin, a cortisol antagonist, has been related to glucorticoids inhibition and to display positive effects on cellular aging. This hormone dysregulation has been associated to psychological issues such as depression, whereas its upregulation has been linked to positive social interaction.
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Affiliation(s)
- Marco Duarte
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, Porto 4169-005, Portugal
| | - Sílvia Santos Pedrosa
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, Porto 4169-005, Portugal
| | - P Raaj Khusial
- Amyris Biotech INC, 5885 Hollis St Ste 100, Emeryville, CA 94608-2405, USA
| | - Ana Raquel Madureira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, Porto 4169-005, Portugal.
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Inaba M, Doi Y. Host stress hormone norepinephrine reduces in vitro activity of aminoglycoside against carbapenemase-producing Enterobacterales. J Antimicrob Chemother 2024; 79:1468-1470. [PMID: 38635670 DOI: 10.1093/jac/dkae113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024] Open
Affiliation(s)
- Masato Inaba
- Department of Infectious Diseases, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
- Division of Infectious Diseases, Central Japan International Medical Center, Mino-Kamo, Gifu, Japan
| | - Yohei Doi
- Department of Infectious Diseases, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
- Division of Infectious Diseases, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Yang J, He Y, Ai Q, Liu C, Ruan Q, Shi Y. Lung-Gut Microbiota and Tryptophan Metabolites Changes in Neonatal Acute Respiratory Distress Syndrome. J Inflamm Res 2024; 17:3013-3029. [PMID: 38764492 PMCID: PMC11102751 DOI: 10.2147/jir.s459496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Accepted: 05/02/2024] [Indexed: 05/21/2024] Open
Abstract
Purpose Neonatal Acute Respiratory Distress Syndrome (NARDS) is a severe respiratory crisis threatening neonatal life. We aim to identify changes in the lung-gut microbiota and lung-plasma tryptophan metabolites in NARDS neonates to provide a differentiated tool and aid in finding potential therapeutic targets. Patients and Methods Lower respiratory secretions, faeces and plasma were collected from 50 neonates including 25 NARDS patients (10 patients with mild NARDS in the NARDS_M group and 15 patients with moderate-to-severe NARDS in the NARDS_S group) and 25 control patients screened based on gestational age, postnatal age and birth weight. Lower airway secretions and feces underwent 16S rRNA gene sequencing to understand the microbial communities in the lung and gut, while lower airway secretions and plasma underwent LC-MS analysis to understand tryptophan metabolites in the lung and blood. Correlation analyses were performed by comparing differences in microbiota and tryptophan metabolites between NARDS and control, NARDS_S and NARDS_M groups. Results Significant changes in lung and gut microbiota as well as lung and plasma tryptophan metabolites were observed in NARDS neonates compared to controls. Proteobacteria and Bacteroidota were increased in the lungs of NARDS neonates, whereas Firmicutes, Streptococcus, and Rothia were reduced. Lactobacillus in the lungs decreased in NARDS_S neonates. Indole-3-carboxaldehyde decreased in the lungs of NARDS neonates, whereas levels of 3-hydroxykynurenine, indoleacetic acid, indolelactic acid, 3-indole propionic acid, indoxyl sulfate, kynurenine, and tryptophan decreased in the lungs of the NARDS_S neonates. Altered microbiota was significantly related to tryptophan metabolites, with changes in lung microbiota and tryptophan metabolites having better differentiated ability for NARDS diagnosis and grading compared to gut and plasma. Conclusion Significant changes occurred in the lung-gut microbiota and lung-plasma tryptophan metabolites of NARDS neonates. Alterations in lung microbiota and tryptophan metabolites were better discriminatory for the diagnosis and grading of NARDS.
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Affiliation(s)
- Jingli Yang
- Department of Neonatology, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- National Clinical Research Center for Child Health and Disorders, Chongqing, People’s Republic of China
- Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Chongqing Key Laboratory of Child Infection and Immunity, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Yu He
- Department of Neonatology, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- National Clinical Research Center for Child Health and Disorders, Chongqing, People’s Republic of China
- Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Chongqing Key Laboratory of Child Infection and Immunity, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Department of Neonatology, Jiangxi Hospital Affiliated to Children’s Hospital of Chongqing Medical University, Jiangxi, People’s Republic of China
| | - Qing Ai
- Department of Neonatology, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- National Clinical Research Center for Child Health and Disorders, Chongqing, People’s Republic of China
- Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Chongqing Key Laboratory of Child Infection and Immunity, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Chan Liu
- Department of Neonatology, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- National Clinical Research Center for Child Health and Disorders, Chongqing, People’s Republic of China
- Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Chongqing Key Laboratory of Child Infection and Immunity, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Qiqi Ruan
- Department of Neonatology, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- National Clinical Research Center for Child Health and Disorders, Chongqing, People’s Republic of China
- Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Chongqing Key Laboratory of Child Infection and Immunity, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
| | - Yuan Shi
- Department of Neonatology, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- National Clinical Research Center for Child Health and Disorders, Chongqing, People’s Republic of China
- Ministry of Education Key Laboratory of Child Development and Disorders, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
- Chongqing Key Laboratory of Child Infection and Immunity, Children’s Hospital of Chongqing Medical University, Chongqing, People’s Republic of China
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Cui R, Zhang J, Liu X, Hu C, Zhou F, Zhang M, Wang X, Zou Q, Huang W. Dronedarone Enhances the Antibacterial Activity of Polymyxin B and Inhibits the Quorum Sensing System by Interacting with LuxS. ACS Infect Dis 2024; 10:961-970. [PMID: 38317424 DOI: 10.1021/acsinfecdis.3c00591] [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: 02/07/2024]
Abstract
Quorum sensing (QS) is considered an appealing target for interference with bacterial infections. β-Adrenergic blockers are promising anti-QS agents but do not have antibacterial activity. We assessed the potential ability of adrenergic receptor inhibitors to enhance the antibacterial activity of polymyxin B (PB) against Klebsiella pneumoniae and determined that dronedarone has the most potent activity both in vitro and in vivo. We found that dronedarone increases the thermal stability of LuxS, decreases the production of AI-2, and affects the biofilm formation of K. pneumoniae. We also identified the direct binding of dronedarone to LuxS. However, the mechanism by which dronedarone enhances the antibacterial activity of PB has not been elucidated and is worthy of further exploration. Our study provides a basis for the future development of drug combination regimens.
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Affiliation(s)
- Ruiqin Cui
- Antimicrobial Drug Screening Laboratory, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, China
- Department of Medical Laboratory, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
| | - Jinyong Zhang
- National Engineering Research Center of Immunological Products, Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Xiaodi Liu
- Department of Infectious Diseases, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
| | - Chunxia Hu
- Antimicrobial Drug Screening Laboratory, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, China
- Department of Medical Laboratory, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
| | - Fan Zhou
- Antimicrobial Drug Screening Laboratory, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, China
- Department of Medical Laboratory, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
| | - Min Zhang
- Antimicrobial Drug Screening Laboratory, Shenzhen Institute of Respiratory Diseases, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, China
| | - Xiao Wang
- Department of Pharmacy, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
| | - Quanming Zou
- National Engineering Research Center of Immunological Products, Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Wei Huang
- Department of Medical Laboratory, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
- Division of Hepatobiliary and Pancreas Surgery, Department of General Surgery, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology, Shenzhen 518020, Guangdong China
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Ziaka M, Exadaktylos A. Pathophysiology of acute lung injury in patients with acute brain injury: the triple-hit hypothesis. Crit Care 2024; 28:71. [PMID: 38454447 PMCID: PMC10918982 DOI: 10.1186/s13054-024-04855-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Accepted: 03/01/2024] [Indexed: 03/09/2024] Open
Abstract
It has been convincingly demonstrated in recent years that isolated acute brain injury (ABI) may cause severe dysfunction of peripheral extracranial organs and systems. Of all potential target organs and systems, the lung appears to be the most vulnerable to damage after ABI. The pathophysiology of the bidirectional brain-lung interactions is multifactorial and involves inflammatory cascades, immune suppression, and dysfunction of the autonomic system. Indeed, the systemic effects of inflammatory mediators in patients with ABI create a systemic inflammatory environment ("first hit") that makes extracranial organs vulnerable to secondary procedures that enhance inflammation, such as mechanical ventilation (MV), surgery, and infections ("second hit"). Moreover, accumulating evidence supports the knowledge that gut microbiota constitutes a critical superorganism and an organ on its own, potentially modifying various physiological functions of the host. Furthermore, experimental and clinical data suggest the existence of a communication network among the brain, gastrointestinal tract, and its microbiome, which appears to regulate immune responses, gastrointestinal function, brain function, behavior, and stress responses, also named the "gut-microbiome-brain axis." Additionally, recent research evidence has highlighted a crucial interplay between the intestinal microbiota and the lungs, referred to as the "gut-lung axis," in which alterations during critical illness could result in bacterial translocation, sustained inflammation, lung injury, and pulmonary fibrosis. In the present work, we aimed to further elucidate the pathophysiology of acute lung injury (ALI) in patients with ABI by attempting to develop the "double-hit" theory, proposing the "triple-hit" hypothesis, focused on the influence of the gut-lung axis on the lung. Particularly, we propose, in addition to sympathetic hyperactivity, blast theory, and double-hit theory, that dysbiosis and intestinal dysfunction in the context of ABI alter the gut-lung axis, resulting in the development or further aggravation of existing ALI, which constitutes the "third hit."
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Affiliation(s)
- Mairi Ziaka
- Clinic for Geriatric Medicine, Center for Geriatric Medicine and Rehabilitation, Kantonsspital Baselland, Bruderholz, Switzerland.
- Department of Emergency Medicine, Inselspital, University Hospital, University of Bern, Bern, Switzerland.
| | - Aristomenis Exadaktylos
- Department of Emergency Medicine, Inselspital, University Hospital, University of Bern, Bern, Switzerland
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8
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Li R, Li J, Zhou X. Lung microbiome: new insights into the pathogenesis of respiratory diseases. Signal Transduct Target Ther 2024; 9:19. [PMID: 38228603 DOI: 10.1038/s41392-023-01722-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 10/25/2023] [Accepted: 11/22/2023] [Indexed: 01/18/2024] Open
Abstract
The lungs were long thought to be sterile until technical advances uncovered the presence of the lung microbial community. The microbiome of healthy lungs is mainly derived from the upper respiratory tract (URT) microbiome but also has its own characteristic flora. The selection mechanisms in the lung, including clearance by coughing, pulmonary macrophages, the oscillation of respiratory cilia, and bacterial inhibition by alveolar surfactant, keep the microbiome transient and mobile, which is different from the microbiome in other organs. The pulmonary bacteriome has been intensively studied recently, but relatively little research has focused on the mycobiome and virome. This up-to-date review retrospectively summarizes the lung microbiome's history, composition, and function. We focus on the interaction of the lung microbiome with the oropharynx and gut microbiome and emphasize the role it plays in the innate and adaptive immune responses. More importantly, we focus on multiple respiratory diseases, including asthma, chronic obstructive pulmonary disease (COPD), fibrosis, bronchiectasis, and pneumonia. The impact of the lung microbiome on coronavirus disease 2019 (COVID-19) and lung cancer has also been comprehensively studied. Furthermore, by summarizing the therapeutic potential of the lung microbiome in lung diseases and examining the shortcomings of the field, we propose an outlook of the direction of lung microbiome research.
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Affiliation(s)
- Ruomeng Li
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Jing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Xikun Zhou
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
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Jia S, Wang X, Wang G, Wang X. Mechanism and application of β-adrenoceptor blockers in soft tissue wound healing. Med Res Rev 2024; 44:422-452. [PMID: 37470332 DOI: 10.1002/med.21984] [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: 07/03/2022] [Revised: 06/01/2023] [Accepted: 07/06/2023] [Indexed: 07/21/2023]
Abstract
Soft tissue damage stimulates sympathetic nerves to release large amounts of catecholamine hormones which bind to β-adrenergic receptors (β-ARs) on the cell membrane surface. It activates the downstream effector molecules and impairs soft tissue wound healing. β-blockers specifically inhibit β-ARs activation in acute/chronic skin lesions and ulcerative hemangiomas. They also accelerate soft tissue wound healing by shortening the duration of inflammation, speeding keratinocyte migration and reepithelialization, promoting wound contraction and angiogenesis, and inhibiting bacterial virulence effects. In addition, β-blockers shorten wound healing periods in patients with severe thermal damage by reducing the hypermetabolic response. While β-blockers promote/inhibit corneal epithelial cell regeneration and restores limbal stem/progenitor cells function, it could well accelerate/delay corneal wound healing. Given these meaningful effects, a growing number of studies are focused on examining the efficacy and safety of β-blockers in soft tissue wound repair, including acute and chronic wounds, severe thermal damage, ulcerated infantile hemangioma, corneal wounds, and other soft tissue disorders. However, an intensive investigation on their acting mechanisms is imperatively needed. The purpose of this article is to summerize the roles of β-blockers in soft tissue wound healing and explore their clinical applications.
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Affiliation(s)
- Shasha Jia
- Department of Oral Implantology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, People's Republic of China
- School of Stomatology, Qingdao University, Qingdao, Shandong, People's Republic of China
| | - Xueya Wang
- Department of Oral Implantology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, People's Republic of China
- School of Stomatology, Qingdao University, Qingdao, Shandong, People's Republic of China
| | - Guowei Wang
- Department of Stomatology, No. 971 Hospital of the Chinese Navy, Qingdao, Shandong, People's Republic of China
| | - Xiaojing Wang
- Department of Oral Implantology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, People's Republic of China
- School of Stomatology, Qingdao University, Qingdao, Shandong, People's Republic of China
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10
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Beurel E. Stress in the microbiome-immune crosstalk. Gut Microbes 2024; 16:2327409. [PMID: 38488630 PMCID: PMC10950285 DOI: 10.1080/19490976.2024.2327409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 03/04/2024] [Indexed: 03/19/2024] Open
Abstract
The gut microbiota exerts a mutualistic interaction with the host in a fragile ecosystem and the host intestinal, neural, and immune cells. Perturbations of the gastrointestinal track composition after stress have profound consequences on the central nervous system and the immune system. Reciprocally, brain signals after stress affect the gut microbiota highlighting the bidirectional communication between the brain and the gut. Here, we focus on the potential role of inflammation in mediating stress-induced gut-brain changes and discuss the impact of several immune cells and inflammatory molecules of the gut-brain dialogue after stress. Understanding the impact of microbial changes on the immune system after stress might provide new avenues for therapy.
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Affiliation(s)
- Eléonore Beurel
- Department of Psychiatry and Behavioral Sciences, Miller School of Medicine, University of Miami, Miami, FL, USA
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL, USA
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11
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Thiroux A, Berjeaud JM, Villéger R, Crépin A. Effect of endocrine disruptors on bacterial virulence. Front Cell Infect Microbiol 2023; 13:1292233. [PMID: 38029256 PMCID: PMC10657830 DOI: 10.3389/fcimb.2023.1292233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
For several decades, questions have been raised about the effects of endocrine disruptors (ED) on environment and health. In humans, EDs interferes with hormones that are responsible for the maintenance of homeostasis, reproduction and development and therefore can cause developmental, metabolic and reproductive disorders. Because of their ubiquity in the environment, EDs can adversely impact microbial communities and pathogens virulence. At a time when bacterial resistance is inevitably emerging, it is necessary to understand the effects of EDs on the behavior of pathogenic bacteria and to identify the resulting mechanisms. Increasing studies have shown that exposure to environmental EDs can affect bacteria physiology. This review aims to highlight current knowledge of the effect of EDs on the virulence of human bacterial pathogens and discuss the future directions to investigate bacteria/EDs interaction. Given the data presented here, extended studies are required to understand the mechanisms by which EDs could modulate bacterial phenotypes in order to understand the health risks.
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Affiliation(s)
- Audrey Thiroux
- Université de Poitiers, UMR CNRS 7267, Ecologie et Biologie des Interactions, Poitiers, France
| | | | | | - Alexandre Crépin
- Université de Poitiers, UMR CNRS 7267, Ecologie et Biologie des Interactions, Poitiers, France
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Abstract
The human microbiome is vast and is present in spaces previously thought to be sterile such as the lungs. A healthy microbiome is diverse and functions in an adaptive way to support local as well as organism health and function. Furthermore, a normal microbiome is essential for normal immune system development rendering the array of microbes that live in and on the human body key components of homeostasis. A wide array of clinical conditions and interventions including anesthesia, analgesia, and surgical intervention may derange the human microbiome in a maladaptive fashion with bacterial responses spanning decreased diversity to transformation to a pathogenic phenotype. Herein, we explore the normal microbiome of the skin, gastrointestinal tract, and the lungs as prototype sites to describe the influence of the microbiomes in each of those locations on health, and how care may derange those relations.
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Aggarwal N, Kitano S, Puah GRY, Kittelmann S, Hwang IY, Chang MW. Microbiome and Human Health: Current Understanding, Engineering, and Enabling Technologies. Chem Rev 2023; 123:31-72. [PMID: 36317983 PMCID: PMC9837825 DOI: 10.1021/acs.chemrev.2c00431] [Citation(s) in RCA: 54] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Indexed: 01/12/2023]
Abstract
The human microbiome is composed of a collection of dynamic microbial communities that inhabit various anatomical locations in the body. Accordingly, the coevolution of the microbiome with the host has resulted in these communities playing a profound role in promoting human health. Consequently, perturbations in the human microbiome can cause or exacerbate several diseases. In this Review, we present our current understanding of the relationship between human health and disease development, focusing on the microbiomes found across the digestive, respiratory, urinary, and reproductive systems as well as the skin. We further discuss various strategies by which the composition and function of the human microbiome can be modulated to exert a therapeutic effect on the host. Finally, we examine technologies such as multiomics approaches and cellular reprogramming of microbes that can enable significant advancements in microbiome research and engineering.
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Affiliation(s)
- Nikhil Aggarwal
- NUS
Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, Singapore 117456, Singapore
- Synthetic
Biology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456, Singapore
| | - Shohei Kitano
- NUS
Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, Singapore 117456, Singapore
- Synthetic
Biology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456, Singapore
| | - Ginette Ru Ying Puah
- NUS
Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, Singapore 117456, Singapore
- Synthetic
Biology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456, Singapore
- Wilmar-NUS
(WIL@NUS) Corporate Laboratory, National
University of Singapore, Singapore 117599, Singapore
- Wilmar
International Limited, Singapore 138568, Singapore
| | - Sandra Kittelmann
- Wilmar-NUS
(WIL@NUS) Corporate Laboratory, National
University of Singapore, Singapore 117599, Singapore
- Wilmar
International Limited, Singapore 138568, Singapore
| | - In Young Hwang
- NUS
Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, Singapore 117456, Singapore
- Synthetic
Biology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456, Singapore
- Department
of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117596, Singapore
- Singapore
Institute of Technology, Singapore 138683, Singapore
| | - Matthew Wook Chang
- NUS
Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, Singapore 117456, Singapore
- Synthetic
Biology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456, Singapore
- Wilmar-NUS
(WIL@NUS) Corporate Laboratory, National
University of Singapore, Singapore 117599, Singapore
- Department
of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117596, Singapore
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Hazime R, Eddehbi FE, El Mojadili S, Lakhouaja N, Souli I, Salami A, M’Raouni B, Brahim I, Oujidi M, Guennouni M, Bousfiha AA, Admou B. Inborn errors of immunity and related microbiome. Front Immunol 2022; 13:982772. [PMID: 36177048 PMCID: PMC9513548 DOI: 10.3389/fimmu.2022.982772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/19/2022] [Indexed: 11/15/2022] Open
Abstract
Inborn errors of immunity (IEI) are characterized by diverse clinical manifestations that are dominated by atypical, recurrent, chronic, or severe infectious or non-infectious features, including autoimmunity, lymphoproliferative disease, granulomas, and/or malignancy, which contribute substantially to morbidity and mortality. Some data suggest a correlation between clinical manifestations of IEI and altered gut microbiota. Many IEI display microbial dysbiosis resulting from the proliferation of pro-inflammatory bacteria or a decrease in anti-inflammatory bacteria with variations in the composition and function of numerous microbiota. Dysbiosis is considered more established, mainly within common variable immunodeficiency, selective immunoglobulin A deficiency, severe combined immunodeficiency diseases, Wiskott–Aldrich syndrome, Hyper-IgE syndrome, autoimmune polyendocrinopathy–candidiasis–ectodermal-dystrophy (APECED), immune dysregulation, polyendocrinopathy, enteropathy X-linked (IPEX) syndrome, IL-10 receptor deficiency, chronic granulomatous disease, and Kostmann disease. For certain IEIs, the specific predominance of gastrointestinal, respiratory, and cutaneous involvement, which is frequently associated with dysbiosis, justifies the interest for microbiome identification. With the better understanding of the relationship between gut microbiota, host immunity, and infectious diseases, the integration of microbiota modulation as a therapeutic approach or a preventive measure of infection becomes increasingly relevant. Thus, a promising strategy is to develop optimized prebiotics, probiotics, postbiotics, and fecal microbial transplantation to rebalance the intestinal microbiota and thereby attenuate the disease activity of many IEIs.
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Affiliation(s)
- Raja Hazime
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
- Biosciences Research Laboratory, Faculty of Medicine and Pharmacy, Cadi Ayyad University, Marrakech, Morocco
| | - Fatima-Ezzohra Eddehbi
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Saad El Mojadili
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Nadia Lakhouaja
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Ikram Souli
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Abdelmouïne Salami
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Bouchra M’Raouni
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Imane Brahim
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Mohamed Oujidi
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Morad Guennouni
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
| | - Ahmed Aziz Bousfiha
- Pediatric infectious and Immunology Department, Ibn Rochd University Hospital, Casablanca, Morocco
- Laboratory of Clinical Immunology inflammation and Allergy, Faculty of Medicine and Pharmacy, Hassan II University, Casablanca, Morocco
| | - Brahim Admou
- Laboratory of Immunology, Center of Clinical Research, Mohammed VI University Hospital, Marrakech, Morocco
- Biosciences Research Laboratory, Faculty of Medicine and Pharmacy, Cadi Ayyad University, Marrakech, Morocco
- *Correspondence: Brahim Admou,
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Zhang P, Liu B, Zheng W, Chen Y, Wu Z, Lu Y, Ma J, Lu W, Zheng M, Wu W, Meng Z, Wu J, Zheng Y, Zhang X, Zhang S, Huang Y. Pulmonary Microbial Composition in Sepsis-Induced Acute Respiratory Distress Syndrome. Front Mol Biosci 2022; 9:862570. [PMID: 35813824 PMCID: PMC9262094 DOI: 10.3389/fmolb.2022.862570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 05/03/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Acute respiratory distress syndrome (ARDS) is an unresolved challenge in the field of respiratory and critical care, and the changes in the lung microbiome during the development of ARDS and their clinical diagnostic value remain unclear. This study aimed to explore the role of the lung microbiome in disease progression in patients with sepsis-induced ARDS and potential therapeutic targets.Methods: Patients with ARDS were divided into two groups according to the initial site of infection, intrapulmonary infection (ARDSp, 111 cases) and extrapulmonary infection (ARDSexp, 45 cases), and a total of 28 patients with mild pulmonary infections were enrolled as the control group. In this study, we sequenced the DNA in the bronchoalveolar lavage fluid collected from patients using metagenomic next-generation sequencing (mNGS) to analyze the changes in the lung microbiome in patients with different infectious site and prognosis and before and after antibiotic treatment.Results: The Shannon–Wiener index indicated a statistically significant reduction in microbial diversity in the ARDSp group compared with the ARDSexp and control groups. The ARDSp group was characterized by a reduction in microbiome diversity, mainly in the normal microbes of the lung, whereas the ARDSexp group was characterized by an increase in microbiome diversity, mainly in conditionally pathogenic bacteria and intestinal microbes. Further analysis showed that an increase in Bilophila is a potential risk factor for death in ARDSexp. An increase in Escherichia coli, Staphylococcus aureus, Candida albicans, enteric microbes, or conditional pathogens may be risk factors for death in ARDSp. In contrast, Hydrobacter may be a protective factor in ARDSp.Conclusion: Different initial sites of infection and prognoses are likely to affect the composition and diversity of the pulmonary microbiome in patients with septic ARDS. This study provides insights into disease development and exploration of potential therapeutic targets.
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Affiliation(s)
- Peng Zhang
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
| | - Baoyi Liu
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
| | - Weihao Zheng
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
| | - Yantang Chen
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
| | - Zhentao Wu
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
| | - Yuting Lu
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
| | - Jie Ma
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
| | - Wenjie Lu
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
| | - Mingzhu Zheng
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
| | - Wanting Wu
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
| | - Zijie Meng
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
| | - Jinhua Wu
- Department of Clinical Laboratory, Jiangmen Central Hospital, Jiangmen, China
| | - Yan Zheng
- Department of Research and Development, Guangdong Research Institute of Genetic Diagnostic and Engineering Technologies for Thalassemia, Hybribio Limited, Guangzhou, China
| | - Xin Zhang
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
- Dongguan Key Laboratory of Medical Bioactive Molecular Developmental and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, China
- Collaborative Innovation Center for Antitumor Active Substance Research and Development, Guangdong Medical University, Zhanjiang, China
- *Correspondence: Xin Zhang, ; Shuang Zhang, ; Yanming Huang,
| | - Shuang Zhang
- Department of Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
- *Correspondence: Xin Zhang, ; Shuang Zhang, ; Yanming Huang,
| | - Yanming Huang
- Clinical Experimental Center, Jiangmen Key Laboratory of Clinical Biobanks and Translational Research, Jiangmen Central Hospital, Jiangmen, China
- Department of Respiratory and Critical Care Medicine, Jiangmen Central Hospital, Jiangmen, China
- *Correspondence: Xin Zhang, ; Shuang Zhang, ; Yanming Huang,
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16
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Medina Lopez AI, Fregoso DR, Gallegos A, Yoon DJ, Fuentes JJ, Crawford R, Kaba H, Yang H, Isseroff RR. Beta adrenergic receptor antagonist can modify
Pseudomonas aeruginosa
biofilm formation in vitro: Implications for chronic wounds. FASEB J 2022; 36:e22057. [DOI: 10.1096/fj.202100717rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 10/20/2021] [Accepted: 11/08/2021] [Indexed: 11/11/2022]
Affiliation(s)
| | - Daniel R. Fregoso
- Department of Dermatology University of California, Davis Davis California USA
| | - Anthony Gallegos
- Department of Dermatology University of California, Davis Davis California USA
| | - Daniel J. Yoon
- Department of Dermatology University of California, Davis Davis California USA
| | - Jaime J. Fuentes
- Department of Biological Sciences California State University Sacramento Sacramento California USA
| | - Robert Crawford
- Department of Biological Sciences California State University Sacramento Sacramento California USA
| | - Hawa Kaba
- Department of Dermatology University of California, Davis Davis California USA
| | - Hsin‐ya Yang
- Department of Dermatology University of California, Davis Davis California USA
| | - R. Rivkah Isseroff
- Department of Dermatology University of California, Davis Davis California USA
- Dermatology Section VA Northern California Health Care System Mather USA
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17
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Hamed A, Pullinger G, Stevens M, Farveen F, Freestone P. Characterisation of the E. coli and Salmonella qseC and qseE mutants reveals a metabolic rather than adrenergic receptor role. FEMS Microbiol Lett 2022; 369:6524176. [PMID: 35137015 PMCID: PMC8897314 DOI: 10.1093/femsle/fnac012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 12/31/2021] [Accepted: 02/04/2022] [Indexed: 11/14/2022] Open
Abstract
Catecholamine stress hormones (norepinephrine, epinephrine, and dopamine) are signals that have been shown to be used as environmental cues, which affect the growth and virulence of normal microbiota as well as pathogenic bacteria. It has been reported that Escherichia coli and Salmonella use the two-component system proteins QseC and QseE to recognise catecholamines and so act as bacterial adrenergic receptors. In this study, we mutated the E. coli O157:H7 and Salmonella enterica serovar Typhimurium genes encoding QseC and QseE and found that this did not block stress hormone responsiveness in either species. Motility, biofilm formation, and analysis of virulence of the mutants using two infection models were similar to the wild-type strains. The main differences in phenotypes of the qseC and qseE mutants were responses to changes in temperature and growth in different media particularly with respect to salt, carbon, and nitrogen salt sources. In this physiological respect, it was also found that the phenotypes of the qseC and qseE mutants differed between E. coli and Salmonella. These findings collectively suggest that QseC and QseE are not essential for E. coli and Salmonella to respond to stress hormones and that the proteins may be playing a role in regulating metabolism.
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Affiliation(s)
- Abdalla Hamed
- Department of Microbiology and Immunology, Faculty of Medicine, University of Zawia, Zawiya QP7X+536, Libya
| | - Gillian Pullinger
- Division of Microbiology, Institute for Animal Health, Compton, Newbury RG20 7NN, United Kingdom
| | - Mark Stevens
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian EH25 9RG, United Kingdom
| | - Fathima Farveen
- Department of Respiratory Sciences, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom
| | - Primrose Freestone
- Corresponding author: Department of Respiratory Sciences, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom. Tel: +44 (0)116 2525656; Fax: +44 (0)116 2525030; E-mail:
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18
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Kobek-Kjeldager C, Schönherz AA, Canibe N, Pedersen LJ. Diet and microbiota-gut-brain axis in relation to tail biting in pigs: A review. Appl Anim Behav Sci 2022. [DOI: 10.1016/j.applanim.2021.105514] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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19
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Boukerb AM, Cambronel M, Rodrigues S, Mesguida O, Knowlton R, Feuilloley MGJ, Zommiti M, Connil N. Inter-Kingdom Signaling of Stress Hormones: Sensing, Transport and Modulation of Bacterial Physiology. Front Microbiol 2021; 12:690942. [PMID: 34690943 PMCID: PMC8526972 DOI: 10.3389/fmicb.2021.690942] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 08/06/2021] [Indexed: 12/29/2022] Open
Abstract
Prokaryotes and eukaryotes have coexisted for millions of years. The hormonal communication between microorganisms and their hosts, dubbed inter-kingdom signaling, is a recent field of research. Eukaryotic signals such as hormones, neurotransmitters or immune system molecules have been shown to modulate bacterial physiology. Among them, catecholamines hormones epinephrine/norepinephrine, released during stress and physical effort, or used therapeutically as inotropes have been described to affect bacterial behaviors (i.e., motility, biofilm formation, virulence) of various Gram-negative bacteria (e.g., Escherichia coli, Salmonella enterica serovar Typhimurium, Pseudomonas aeruginosa, Vibrio sp.). More recently, these molecules were also shown to influence the physiology of some Gram-positive bacteria like Enterococcus faecalis. In E. coli and S. enterica, the stress-associated mammalian hormones epinephrine and norepinephrine trigger a signaling cascade by interacting with the QseC histidine sensor kinase protein. No catecholamine sensors have been well described yet in other bacteria. This review aims to provide an up to date report on catecholamine sensors in eukaryotes and prokaryotes, their transport, and known effects on bacteria.
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Affiliation(s)
- Amine Mohamed Boukerb
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Melyssa Cambronel
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Sophie Rodrigues
- EA 3884, LBCM, IUEM, Université de Bretagne-Sud, Lorient, France
| | - Ouiza Mesguida
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Rikki Knowlton
- MRC Laboratory of Molecular Biology, Cambridge, United Kingdom
| | - Marc G J Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Mohamed Zommiti
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Nathalie Connil
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
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20
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Liu X, Ye H, Zheng X, Zheng Z, Chen W, Yu X. Increased risk of catheter-related infection in critically ill patients given catecholamine inotropes during continuous renal replacement therapy. Hemodial Int 2021; 26:13-22. [PMID: 34318564 DOI: 10.1111/hdi.12968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 06/21/2021] [Accepted: 06/25/2021] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Previous in vitro studies have shown that catecholamine inotropes are potent stimulators of bacterial growth and biofilm formation on catheter surfaces. This study aimed to investigate the effects of administering catecholamine inotropes during continuous renal replacement therapy (CRRT) on catheter-related infections in critically ill patients. METHODS This single-center retrospective cohort study included patients requiring CRRT in an intensive care unit from 2016 to 2017, who were divided into those who received and did not receive catecholamine inotropes for ≥24 h (catecholamine and control groups, respectively). The primary endpoint was catheter-related infection, including catheter-related colonization (CRCOL) and catheter-related bloodstream infection (CRBSI). FINDINGS We included 235 patients with 297 dialysis catheters. The catecholamine group had higher proportions of cardiovascular disease (p = 0.002), shock (p < 0.001), mechanical ventilation (p < 0.001), and antibiotic use (p = 0.013). There was no significant between-group difference in the CRBSI incidence (5.742 vs. 3.143 events/1000 catheter-days; p = 0.205). However, the CRCOL incidence was significantly higher in the catecholamine group than in the control group (6.221 vs. 0.898 events/1000 catheter-days; p = 0.006). The prominent pathogenic bacteria were gram-negative bacteria. After adjusting for confounding factors in multivariate logistic models, catecholamine inotropes (OR: 3.575, 95% CI: 1.422-9.912, p = 0.008) and immunosuppression (OR: 2.980, 95% CI: 1.137-7.812, p = 0.026) were independently associated with a higher risk of catheter-related infections. DISCUSSION We observed a similar incidence of catheter-related infection with that in other CRRT patients. Using catecholamine inotropes in those patients increased CRCOL risk, which is consistent with previous in vitro studies. Our findings suggest that catecholamine inotropes is an independent risk factor for catheter-related infections in critically ill patients undergoing CRRT.
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Affiliation(s)
- Xiaotian Liu
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Nephrology, National Health Commission and Guangdong Province, Guangzhou, China
| | - Hongjian Ye
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Nephrology, National Health Commission and Guangdong Province, Guangzhou, China
| | - Xunhua Zheng
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Nephrology, National Health Commission and Guangdong Province, Guangzhou, China
| | - Zhihua Zheng
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Nephrology, National Health Commission and Guangdong Province, Guangzhou, China
| | - Wei Chen
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Nephrology, National Health Commission and Guangdong Province, Guangzhou, China
| | - Xueqing Yu
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Nephrology, National Health Commission and Guangdong Province, Guangzhou, China
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21
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Toni T, Alverdy J. Harnessing the Microbiome to Optimize Surgical Outcomes in the COVID-19 Era. ANNALS OF SURGERY OPEN 2021; 2:e056. [PMID: 36590034 PMCID: PMC9794001 DOI: 10.1097/as9.0000000000000056] [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] [Received: 06/21/2020] [Accepted: 02/18/2021] [Indexed: 01/04/2023] Open
Abstract
In this era of testing uncertainties, changing guidelines, and incomplete knowledge, "clearing" patients for surgery in the time of SARS-COVID-19 has been met with various challenges. Efforts to increase patient fitness have long been at the forefront of surgical practicing guidelines, but the current climate requires a renewed sense of focus on these measures. It is essential to understand how dietary history, previous antibiotic exposure, and baseline microbiota can inform and optimize preoperative and postoperative management of the surgical patient in the time of COVID-19. This piece focuses on the clinical, molecular, and physiologic dynamics that occur in preparing patients for surgery during COVID-19, considering the physiologic stress inherent in the procedure itself and the importance of specialized perioperative management approaches. COVID-19 has created a renewed sense of urgency to maintain our discipline in implementing those practices that have long been confirmed to be beneficial to patient outcome. This practice, along with a renewed interest in understanding how the gut microbiome is affected by the confinement, social distancing, etc., due to the COVID pandemic, is ever more important. Therefore, here we discuss the microbiome's role as a defense against viral infection and its potential for reactivation during the process of surgery as the next frontier for surgical advancement.
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Affiliation(s)
- Tiffany Toni
- From the Pritzker School of Medicine, University of Chicago, Chicago, IL
| | - John Alverdy
- From the Pritzker School of Medicine, University of Chicago, Chicago, IL
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22
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Unexpected Cell Wall Alteration-Mediated Bactericidal Activity of the Antifungal Caspofungin against Vancomycin-Resistant Enterococcus faecium. Antimicrob Agents Chemother 2020; 64:AAC.01261-20. [PMID: 32778553 DOI: 10.1128/aac.01261-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/02/2020] [Indexed: 12/11/2022] Open
Abstract
Enterococcus faecium has become a major opportunistic pathogen with the emergence of vancomycin-resistant enterococci (VRE). As part of the gut microbiota, they have to cope with numerous stresses, including effects of antibiotics and other xenobiotics, especially in patients hospitalized in intensive care units (ICUs) who receive many medications. The aim of this study was to investigate the impact of the most frequently prescribed xenobiotics for ICU patients on fitness, pathogenicity, and antimicrobial resistance of the vanB-positive E. faecium Aus0004 reference strain. Several phenotypic analyses were carried out, and we observed that caspofungin, an antifungal agent belonging to the family of echinocandins, had an important effect on E. faecium growth in vitro We confirmed this effect by electron microscopy and peptidoglycan analysis and showed that, even at a subinhibitory concentration (1/4× MIC, 8 mg/liter), caspofungin had an impact on cell wall organization, especially with respect to the abundance of some muropeptide precursors. By transcriptome sequencing (RNA-seq), it was also shown that around 20% of the transcriptome was altered in the presence of caspofungin, with 321 and 259 significantly upregulated and downregulated genes, respectively. Since the fungal target of caspofungin (i.e., β-1,3-glucan synthase) was absent in bacteria, the mechanistic pathway of caspofungin activity was investigated. The repression of genes involved in the metabolism of pyruvate seemed to have a drastic impact on bacterial cell viability, while a decrease of glycerol metabolism could explain the conformational modifications of peptidoglycan. This is the first report of caspofungin antibacterial activity against E. faecium, highlighting the potential impact of nonantibiotic xenobiotics against bacterial pathogens.
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23
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Li J, Ma X, Zhao L, Li Y, Zhou Q, Du X. Extended Contact Lens Wear Promotes Corneal Norepinephrine Secretion and Pseudomonas aeruginosa Infection in Mice. Invest Ophthalmol Vis Sci 2020; 61:17. [PMID: 32298434 PMCID: PMC7401850 DOI: 10.1167/iovs.61.4.17] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Purpose Extended contact lens (CL) wear predisposes the wearer to Pseudomonas aeruginosa infection of the cornea, but the mechanism involved remains incompletely understood. The purpose of this study was to investigate the role of the stress hormone norepinephrine (NE) in the pathogenesis of CL-induced P. aeruginosa keratitis. Methods A total 195 adult C57BL/6 mice were used in this study. Corneal NE content was measured after 48 hours of sterile CL wear in mice. The effect of NE on P. aeruginosa adhesion and biofilm formation on the CL surface was examined in vitro. Moreover, mouse eyes were covered with P. aeruginosa-contaminated CLs, and either 500-µM NE was topically applied or the eyes were subconjunctivally injected with 100 µg of N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine (DSP-4) to deplete local NE. Clinical scores, neutrophil infiltration, proinflammatory cytokine levels, and bacterial load on the corneas and CLs were evaluated. Results Corneal NE content was elevated with extended CL wear in mice. In vitro, NE promoted the adhesion and biofilm formation of P. aeruginosa on the CL surface. In mice, topical application of NE aggravated P. aeruginosa infection, accompanied with increased clinical scores, neutrophil infiltration, proinflammatory cytokine expression, and bacterial burden on the corneas and CLs. However, pre-depletion of local NE with DSP-4 significantly alleviated the severity of P. aeruginosa keratitis. Conclusions Extended CL wear elevates corneal NE content, which promotes the pathogenesis of CL-induced P. aeruginosa keratitis in mice. Targeting NE may provide a potential strategy for the treatment of CL-related corneal infection caused by P. aeruginosa.
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24
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Gosens R, Hiemstra PS, Adcock IM, Bracke KR, Dickson RP, Hansbro PM, Krauss-Etschmann S, Smits HH, Stassen FRM, Bartel S. Host-microbe cross-talk in the lung microenvironment: implications for understanding and treating chronic lung disease. Eur Respir J 2020; 56:13993003.02320-2019. [PMID: 32430415 PMCID: PMC7439216 DOI: 10.1183/13993003.02320-2019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/20/2020] [Indexed: 12/15/2022]
Abstract
Chronic respiratory diseases are highly prevalent worldwide and will continue to rise in the foreseeable future. Despite intensive efforts over recent decades, the development of novel and effective therapeutic approaches has been slow. However, there is new and increasing evidence that communities of micro-organisms in our body, the human microbiome, are crucially involved in the development and progression of chronic respiratory diseases. Understanding the detailed mechanisms underlying this cross-talk between host and microbiota is critical for development of microbiome- or host-targeted therapeutics and prevention strategies. Here we review and discuss the most recent knowledge on the continuous reciprocal interaction between the host and microbes in health and respiratory disease. Furthermore, we highlight promising developments in microbiome-based therapies and discuss the need to employ more holistic approaches of restoring both the pulmonary niche and the microbial community. The reciprocal interaction between microbes and host in the lung is increasingly recognised as an important determinant of health. The complexity of this cross-talk needs to be taken into account when studying diseases and developing future new therapies.https://bit.ly/2VKYUfT
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Affiliation(s)
- Reinoud Gosens
- University of Groningen, Dept of Molecular Pharmacology, GRIAC Research Institute, Groningen, The Netherlands
| | - Pieter S Hiemstra
- Dept of Pulmonology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Ian M Adcock
- Airways Disease, National Heart and Lung Institute, Imperial College London, London, UK
| | - Ken R Bracke
- Dept of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Robert P Dickson
- Division of Pulmonary and Critical Care Medicine, Dept of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA.,Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI, USA
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle, Newcastle, Australia.,Centre for Inflammation, Centenary Institute and University of Technology Sydney, Faculty of Science, Sydney, Australia
| | - Susanne Krauss-Etschmann
- Early Life Origins of Chronic Lung Disease, Research Center Borstel, Leibniz Lung Center, Airway Research Center North, Member of the German Center for Lung Research (DZL), Borstel, Germany.,Institute for Experimental Medicine, Christian-Albrechts-Universitaet zu Kiel, Kiel, Germany
| | - Hermelijn H Smits
- Dept of Parasitology, Leiden University Medical Center, Leiden, The Netherlands
| | - Frank R M Stassen
- Dept of Medical Microbiology, NUTRIM - School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Sabine Bartel
- Early Life Origins of Chronic Lung Disease, Research Center Borstel, Leibniz Lung Center, Airway Research Center North, Member of the German Center for Lung Research (DZL), Borstel, Germany .,University of Groningen, University Medical Center Groningen, Dept of Pathology and Medical Biology, GRIAC Research Institute, Groningen, The Netherlands
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25
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Cambronel M, Nilly F, Mesguida O, Boukerb AM, Racine PJ, Baccouri O, Borrel V, Martel J, Fécamp F, Knowlton R, Zimmermann K, Domann E, Rodrigues S, Feuilloley M, Connil N. Influence of Catecholamines (Epinephrine/Norepinephrine) on Biofilm Formation and Adhesion in Pathogenic and Probiotic Strains of Enterococcus faecalis. Front Microbiol 2020; 11:1501. [PMID: 32849320 PMCID: PMC7396564 DOI: 10.3389/fmicb.2020.01501] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 06/10/2020] [Indexed: 12/14/2022] Open
Abstract
Enterococcus faecalis has controversial status due to its emerging role in nosocomial infections, while some strains with beneficial effects are used as probiotics and starter cultures in dairy industry. These bacteria can be found as resident or transient germs in the gut or on skin, where they are continually exposed to various eukaryotic molecules. In this context, the aim of our work was to evaluate the effect of the catecholamine stress hormones, epinephrine (Epi), and norepinephrine (NE) on some Enterococcus strains. Four E. faecalis strains were included in this study: E. faecalis MMH594 and E. faecalis V583, pathogenic strains of clinical origin, E. faecalis Symbioflor 1 clone DSM 16431, a pharmaceutical probiotic, and E. faecalis OB15, a probiotic strain previously isolated from Tunisian rigouta (Baccouri et al., 2019). Epi was found to modulate the formation of biofilm (biovolume and thickness) in E. faecalis, whether pathogens or probiotics. NE had less effect on biofilm formation of these bacteria. We also investigated the effect of Epi and NE on adhesion of E. faecalis to eukaryotic cells as it is the first step of colonization of the host. Epi was found to significantly enhance the adhesion of MMH594 and OB15 to Caco-2/TC7 intestinal cells and HaCaT keratinocyte cells, whereas NE significantly increased the adhesion of V583 and Symbioflor 1 DSM 16431 to Caco-2/TC7 cells, the adhesion of MMH594, Symbioflor 1 DSM 16431, and OB15 to HaCaT cells. Analysis of a putative adrenergic sensor of Epi/NE in E. faecalis, compared to QseC, the Escherichia coli adrenergic receptor, allowed the identification of VicK as the nearest protein to QseC with 29% identity and 46% similarity values. Structure modeling and molecular docking of VicK corroborated the hypothesis of possible interactions of this putative adrenergic sensor with Epi and NE, with binding energies of -4.08 and -4.49 kcal/mol, respectively. In conclusion, this study showed for the first time that stress hormones could increase biofilm formation and adhesion to eukaryotic cells in E. faecalis. Future experiments will aim to confirm by in vivo studies the role of VicK as adrenergic sensor in E. faecalis probiotic and pathogen strains. This may help to develop new strategies of antagonism/competition in the gut or skin ecological niches, and to prevent the colonization by opportunistic pathogens.
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Affiliation(s)
- Mélyssa Cambronel
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Flore Nilly
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Ouiza Mesguida
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Amine Mohamed Boukerb
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Pierre-Jean Racine
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Olfa Baccouri
- Laboratory of Protein Engineering and Bioactive Molecules, National Institute of Applied Sciences and Technology, University of Carthage, Tunis, Tunisia
| | - Valérie Borrel
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Jérome Martel
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Florian Fécamp
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Rikki Knowlton
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | | | - Eugen Domann
- Institute of Medical Microbiology, German Centre for Infection Research, Justus-Liebig-University Giessen, Giessen, Germany
| | - Sophie Rodrigues
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Marc Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
| | - Nathalie Connil
- Laboratoire de Microbiologie Signaux et Microenvironnement EA 4312, Université de Rouen, Normandie Université, Évreux, France
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26
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Chernevskaya E, Beloborodova N, Klimenko N, Pautova A, Shilkin D, Gusarov V, Tyakht A. Serum and fecal profiles of aromatic microbial metabolites reflect gut microbiota disruption in critically ill patients: a prospective observational pilot study. Crit Care 2020; 24:312. [PMID: 32513224 PMCID: PMC7278238 DOI: 10.1186/s13054-020-03031-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 05/27/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND High serum levels of certain aromatic microbial metabolites (AMM) are associated with severity and mortality in critically ill patients. Omics-based studies suggest gut dysbiosis and reduced microbiome diversity in critical conditions. However, the landscape of gut microbial metabolites is still to be outlined, not to mention the interplay correlation between the metabolome and gut microbiome in critically ill patients. The aim of this study was to analyze the association between serum and fecal levels of AMM and compare them with the composition of gut microbiota in critically ill patients in the acute and chronic stages. METHODS In this prospective observational pilot study, we analyzed the temporal dynamics of the gut microbiome and the AMM spectrum across two distinct subgroups-acute critical ill (ACI) patients with nosocomial pneumonia and chronically critically ill (CCI) patients (9 subjects each group)-as well as performed comparison with 23 healthy volunteers. The AMM levels for each patient were measured using GC-MS in simultaneously taken serum and fecal samples (SFS). These parameters were compared with 16S rRNA fecal microbiome profiles. RESULTS The observed proportions of bacterial taxa suggest a significant gut dysbiosis in the ACI and the CCI patients. Stronger imbalance in microbiome composition and dynamics observed in the ACI patients compared to the CCI ones resonates with a higher severity in the former group. The total levels of AMM in serum samples were higher for the ACI patients than for the CCI patients (3.7 (1.4-6.3) and 1.1 (1.0-1.6) μM, respectively; p = 0.0003). The qualitative composition of the SFS was also altered. We discovered significant associations between gut microbial taxa levels and metabolite concentrations in blood serum as well as in feces in each of the ACI and the CCI patients. CONCLUSIONS Aromatic microbial metabolite profiles in the gut and the serum are interlinked and reflect a disruption of the gut microbial community in critically ill patients.
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Affiliation(s)
- Ekaterina Chernevskaya
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 25-2 Petrovka str., Moscow, Russia, 107031.
| | - Natalia Beloborodova
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 25-2 Petrovka str., Moscow, Russia, 107031
| | - Natalia Klimenko
- Atlas Biomed Group - Knomics LLC, 31 Malaya Nikitskaya str., Moscow, Russia, 121069
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology Russian Academy of Sciences, 34/5 Vavilova str., Moscow, Russia, 119334
| | - Alisa Pautova
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 25-2 Petrovka str., Moscow, Russia, 107031
| | - Dmitrii Shilkin
- N. Pirogov National Medical Surgical Center, 70 Nizhnyaya Pervomayskaya str., Moscow, Russia, 105203
| | - Vitaliy Gusarov
- N. Pirogov National Medical Surgical Center, 70 Nizhnyaya Pervomayskaya str., Moscow, Russia, 105203
| | - Alexander Tyakht
- Atlas Biomed Group - Knomics LLC, 31 Malaya Nikitskaya str., Moscow, Russia, 121069
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology Russian Academy of Sciences, 34/5 Vavilova str., Moscow, Russia, 119334
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27
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Ma X, Wang Q, Song F, Li Y, Li J, Dou S, Xie L, Zhou Q. Corneal epithelial injury-induced norepinephrine promotes Pseudomonas aeruginosa keratitis. Exp Eye Res 2020; 195:108048. [PMID: 32376471 DOI: 10.1016/j.exer.2020.108048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 04/17/2020] [Accepted: 04/27/2020] [Indexed: 12/17/2022]
Abstract
Tissue injury causes the secretion of stress hormone catecholamine and increases susceptibility to opportunistic infection. Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen that is a leading cause of microbial keratitis usually associated with ocular injury or contact lens wear. However, the effect of catecholamine on P. aeruginosa induced corneal infection is unknown. Here, we test if norepinephrine (NE) would promote the progression of P. aeruginosa keratitis in mice. Adult C57BL/6 mouse corneas were scarified and then inoculated with P. aeruginosa. The content of NE was elevated in corneas after scarification and inoculation with P. aeruginosa. Then, exogenous NE was applied to the infected corneas at 24 h after inoculation; control eyes were treated with sterile saline. Topical application of NE aggravated the severity of P. aeruginosa keratitis, accompanied with the increase of clinical score, bacterial load, pathological changes, neutrophils infiltration, bacterial virulence factors and proinflammatory factors levels. In order to further verify the role of NE, N-(2-Chloroethyl)-N-ethyl-2-bromobenzylamine hydrochloride (DSP-4), a neurotoxin selected to deplete NE, was injected subconjunctivally 12 h before scarification. Pre-depletion of local NE by DSP-4 significantly alleviated the severity of corneal infection. Moreover, NE was also confirmed to increase the bacterial growth and the expression of virulence factors gene in vitro. Together, these data showed that increased corneal NE content facilitated the progression of P. aeruginosa keratitis in mice by amplifying host excessive inflammatory response and bacterial virulence. Therefore, targeting NE may provide a potential strategy for the treatment of P. aeruginosa keratitis.
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Affiliation(s)
- Xiubin Ma
- Medical College, Qingdao University, Qingdao, China; State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China
| | - Qun Wang
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China
| | - Fangying Song
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China
| | - Ya Li
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China
| | - Jing Li
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China
| | - Shengqian Dou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China
| | - Lixin Xie
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China.
| | - Qingjun Zhou
- State Key Laboratory Cultivation Base, Shandong Provincial Key Laboratory of Ophthalmology, Shandong Eye Institute, Shandong First Medical University & Shandong Academy of Medical Sciences, Qingdao, China.
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28
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Carney SM, Clemente JC, Cox MJ, Dickson RP, Huang YJ, Kitsios GD, Kloepfer KM, Leung JM, LeVan TD, Molyneaux PL, Moore BB, O'Dwyer DN, Segal LN, Garantziotis S. Methods in Lung Microbiome Research. Am J Respir Cell Mol Biol 2020; 62:283-299. [PMID: 31661299 PMCID: PMC7055701 DOI: 10.1165/rcmb.2019-0273tr] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/29/2019] [Indexed: 12/13/2022] Open
Abstract
The lung microbiome is associated with host immune response and health outcomes in experimental models and patient cohorts. Lung microbiome research is increasing in volume and scope; however, there are no established guidelines for study design, conduct, and reporting of lung microbiome studies. Standardized approaches to yield reliable and reproducible data that can be synthesized across studies will ultimately improve the scientific rigor and impact of published work and greatly benefit microbiome research. In this review, we identify and address several key elements of microbiome research: conceptual modeling and hypothesis framing; study design; experimental methodology and pitfalls; data analysis; and reporting considerations. Finally, we explore possible future directions and research opportunities. Our goal is to aid investigators who are interested in this burgeoning research area and hopefully provide the foundation for formulating consensus approaches in lung microbiome research.
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Affiliation(s)
| | | | | | | | - Yvonne J Huang
- University of Michigan Medical School, Ann Arbor, Michigan
| | - Georgios D Kitsios
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Kirsten M Kloepfer
- Division of Pulmonary, Allergy and Sleep Medicine, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana
| | - Janice M Leung
- Centre for Heart Lung Innovation, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Philip L Molyneaux
- Fibrosis Research Group, National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Royal Brompton and Harefield Foundation National Health Service Trust, London, United Kingdom
| | | | | | - Leopoldo N Segal
- Division of Pulmonary, Critical Care and Sleep Medicine, New York University School of Medicine, New York, New York; and
| | - Stavros Garantziotis
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
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29
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Lee DDH, Petris A, Hynds RE, O'Callaghan C. Ciliated Epithelial Cell Differentiation at Air-Liquid Interface Using Commercially Available Culture Media. Methods Mol Biol 2020; 2109:275-291. [PMID: 31707647 PMCID: PMC7116769 DOI: 10.1007/7651_2019_269] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
The human nasal epithelium contains basal stem/progenitor cells that produce differentiated multiciliated and mucosecretory progeny. Basal epithelial cells can be expanded in cell culture and instructed to differentiate at an air-liquid interface using transwell membranes and differentiation media. For basal cell expansion, we have used 3T3-J2 co-culture in epithelial culture medium containing EGF, insulin, and a RHO-associated protein kinase (ROCK) inhibitor, Y-27632 (3T3 + Y). Here we describe our protocols for ciliated differentiation of these cultures at air-liquid interface and compare four commercially available differentiation media, across nine donor cell cultures (six healthy, two patients with chronic obstructive pulmonary disease (COPD), and one with primary ciliary dyskinesia (PCD)). Bright-field and immunofluorescence imaging suggested broad similarity between differentiation protocols. Subtle differences were seen in transepithelial electrical resistance (TEER), ciliary beat frequency, mucus production, and the extent to which basal cells are retained in differentiated cultures. Overall, the specific differentiation medium used in our air-liquid interface culture protocol was not a major determinant of ciliation, and our data suggest that the differentiation potential of basal cells at the outset is a more critical factor in air-liquid interface culture outcome. Detailed information on the constituents of the differentiation media was only available from one of the four manufacturers, a factor that may have profound implications in the interpretation of some research studies.
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Affiliation(s)
- Dani Do Hyang Lee
- Respiratory, Critical Care & Anaesthesia, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Alina Petris
- Respiratory, Critical Care & Anaesthesia, UCL Great Ormond Street Institute of Child Health, London, UK
| | | | - Christopher O'Callaghan
- Respiratory, Critical Care & Anaesthesia, UCL Great Ormond Street Institute of Child Health, London, UK.
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30
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Cambronel M, Tortuel D, Biaggini K, Maillot O, Taupin L, Réhel K, Rincé I, Muller C, Hardouin J, Feuilloley M, Rodrigues S, Connil N. Epinephrine affects motility, and increases adhesion, biofilm and virulence of Pseudomonas aeruginosa H103. Sci Rep 2019; 9:20203. [PMID: 31882963 PMCID: PMC6934790 DOI: 10.1038/s41598-019-56666-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 12/04/2019] [Indexed: 12/20/2022] Open
Abstract
Microbial endocrinology has demonstrated for more than two decades, that eukaryotic substances (hormones, neurotransmitters, molecules of the immune system) can modulate the physiological behavior of bacteria. Among them, the hormones/neurotransmitters, epinephrine (Epi) and norepinephrine (NE), released in case of stress, physical effort or used in medical treatment, were shown to be able to modify biofilm formation in various bacterial species. In the present study, we have evaluated the effect of Epi on motility, adhesion, biofilm formation and virulence of Pseudomonas aeruginosa, a bacterium linked to many hospital-acquired infections, and responsible for chronic infection in immunocompromised patients including persons suffering from cystic fibrosis. The results showed that Epi increased adhesion and biofilm formation of P. aeruginosa, as well as its virulence towards the Galleria mellonella larvae in vivo model. Deciphering the sensor of this molecule in P. aeruginosa and the molecular mechanisms involved may help to find new strategies of treatment to fight against this bacterium.
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Affiliation(s)
- Mélyssa Cambronel
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France
| | - Damien Tortuel
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France
| | - Kelly Biaggini
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France
| | - Olivier Maillot
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France
| | - Laure Taupin
- Laboratoire de Biotechnologie et Chimie Marines (LBCM) EA 3884, IUEM, Université de Bretagne-Sud, 56100, Lorient, France
| | - Karine Réhel
- Laboratoire de Biotechnologie et Chimie Marines (LBCM) EA 3884, IUEM, Université de Bretagne-Sud, 56100, Lorient, France
| | - Isabelle Rincé
- Unité de Recherche Risques Microbiens (U2RM), EA 4655, UFR des sciences, Normandie Université, Université de Caen, 14000, Caen, France
| | - Cécile Muller
- Unité de Recherche Risques Microbiens (U2RM), EA 4655, UFR des sciences, Normandie Université, Université de Caen, 14000, Caen, France
| | - Julie Hardouin
- Laboratoire Polymères, Biopolymères, Surfaces, UMR 6270 CNRS, Plateforme Protéomique, PISSARO, Normandie Université, Université de Rouen, 76130, Mont Saint Aignan, France
| | - Marc Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France
| | - Sophie Rodrigues
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France
| | - Nathalie Connil
- Laboratoire de Microbiologie Signaux et Microenvironnement (LMSM) EA 4312, Normandie Université - Université de Rouen, Évreux, 27000, Evreux, France.
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31
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Imam M, Alrashid B, Patel F, Dowah ASA, Brown N, Millard A, Clokie MRJ, Galyov EE. vB_PaeM_MIJ3, a Novel Jumbo Phage Infecting Pseudomonas aeruginosa, Possesses Unusual Genomic Features. Front Microbiol 2019; 10:2772. [PMID: 31849908 PMCID: PMC6892783 DOI: 10.3389/fmicb.2019.02772] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 11/13/2019] [Indexed: 01/06/2023] Open
Abstract
Phages are the most abundant biological entity on Earth. There are many variants in phage virion sizes, morphology, and genome sizes. Large virion sized phages, with genome sizes greater than 200 kbp have been identified and termed as Jumbo phages. These phages exhibit certain characteristics that have not been reported in phages with smaller genomes. In this work, a jumbo phage named MIJ3 (vB_PaeM_MIJ3) that infects Pseudomonas aeruginosa PAO1 was isolated from an equine livery yard in Leicestershire, United Kingdom. The genome and biological characteristics of this phage have been investigated. MIJ3 is a Myovirus with multiple long tail fibers. Assessment of the host range of MIJ3 revealed that it has the ability to infect many clinical isolates of P. aeruginosa. Bioinformatics analysis of the phage genome indicated that MIJ3 is closely related to the Pseudomonas phage, PA5oct. MIJ3 possesses several unusual features that are either rarely present in other phages or have not yet been reported. In particular, MIJ3 encodes a FtsH-like protein, and a putative lysidine synthase, TilS. These two proteins have not been reported in phages. MIJ3 also possesses a split DNA polymerase B with a novel intein. Of particular interest, unlike other jumbo phages infecting Pseudomonas spp., MIJ3 lacks the genetic elements required for the formation of the phage nucleus, which was believed to be conserved across jumbo Pseudomonas phages.
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Affiliation(s)
- Mohammed Imam
- Department of Respiratory Sciences, College of Life Sciences, University of Leicester, Leicester, United Kingdom.,Laboratory Department, University Medical Center, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Bandar Alrashid
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom.,King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Faizal Patel
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom
| | - Ahmed S A Dowah
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom
| | - Nathan Brown
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom
| | - Andrew Millard
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom
| | - Martha R J Clokie
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom
| | - Edouard E Galyov
- Department of Genetics and Genome Biology, College of Life Sciences, University of Leicester, Leicester, United Kingdom
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32
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Cryan JF, O'Riordan KJ, Cowan CSM, Sandhu KV, Bastiaanssen TFS, Boehme M, Codagnone MG, Cussotto S, Fulling C, Golubeva AV, Guzzetta KE, Jaggar M, Long-Smith CM, Lyte JM, Martin JA, Molinero-Perez A, Moloney G, Morelli E, Morillas E, O'Connor R, Cruz-Pereira JS, Peterson VL, Rea K, Ritz NL, Sherwin E, Spichak S, Teichman EM, van de Wouw M, Ventura-Silva AP, Wallace-Fitzsimons SE, Hyland N, Clarke G, Dinan TG. The Microbiota-Gut-Brain Axis. Physiol Rev 2019; 99:1877-2013. [DOI: 10.1152/physrev.00018.2018] [Citation(s) in RCA: 1243] [Impact Index Per Article: 248.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The importance of the gut-brain axis in maintaining homeostasis has long been appreciated. However, the past 15 yr have seen the emergence of the microbiota (the trillions of microorganisms within and on our bodies) as one of the key regulators of gut-brain function and has led to the appreciation of the importance of a distinct microbiota-gut-brain axis. This axis is gaining ever more traction in fields investigating the biological and physiological basis of psychiatric, neurodevelopmental, age-related, and neurodegenerative disorders. The microbiota and the brain communicate with each other via various routes including the immune system, tryptophan metabolism, the vagus nerve and the enteric nervous system, involving microbial metabolites such as short-chain fatty acids, branched chain amino acids, and peptidoglycans. Many factors can influence microbiota composition in early life, including infection, mode of birth delivery, use of antibiotic medications, the nature of nutritional provision, environmental stressors, and host genetics. At the other extreme of life, microbial diversity diminishes with aging. Stress, in particular, can significantly impact the microbiota-gut-brain axis at all stages of life. Much recent work has implicated the gut microbiota in many conditions including autism, anxiety, obesity, schizophrenia, Parkinson’s disease, and Alzheimer’s disease. Animal models have been paramount in linking the regulation of fundamental neural processes, such as neurogenesis and myelination, to microbiome activation of microglia. Moreover, translational human studies are ongoing and will greatly enhance the field. Future studies will focus on understanding the mechanisms underlying the microbiota-gut-brain axis and attempt to elucidate microbial-based intervention and therapeutic strategies for neuropsychiatric disorders.
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Affiliation(s)
- John F. Cryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Kenneth J. O'Riordan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Caitlin S. M. Cowan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Kiran V. Sandhu
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Thomaz F. S. Bastiaanssen
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Marcus Boehme
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Martin G. Codagnone
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Sofia Cussotto
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Christine Fulling
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Anna V. Golubeva
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Katherine E. Guzzetta
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Minal Jaggar
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Caitriona M. Long-Smith
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Joshua M. Lyte
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Jason A. Martin
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Alicia Molinero-Perez
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Gerard Moloney
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Emanuela Morelli
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Enrique Morillas
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Rory O'Connor
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Joana S. Cruz-Pereira
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Veronica L. Peterson
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Kieran Rea
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Nathaniel L. Ritz
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Eoin Sherwin
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Simon Spichak
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Emily M. Teichman
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Marcel van de Wouw
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Ana Paula Ventura-Silva
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Shauna E. Wallace-Fitzsimons
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Niall Hyland
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Gerard Clarke
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Timothy G. Dinan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
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Gümüş D, Kalaycı Yüksek F, Sefer Ö, Yörük E, Uz G, Anğ Küçüker M. The roles of hormones in the modulation of growth and virulence genes' expressions in UPEC strains. Microb Pathog 2019; 132:319-324. [PMID: 31082530 DOI: 10.1016/j.micpath.2019.05.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 05/08/2019] [Accepted: 05/10/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Host factors such as hormones are known to modulate growth, virulence and antibiotic susceptibility of bacteria. In the present study, the effect of norepinephrine (NE) and estradiol (Est) on growth and expression levels of virulence genes (usp, sfa/foc, cnf1, aer) of uropathogenic E. coli (UPEC) strains C7 and C149 were investigated. METHODS E. coli C7 and C149 were grown in serum based SAPI broth with and without three different concentrations of norepinephrine and estradiol. Growths were determined via optical density measurement in a spectrophotometer. Real-time polymerase chain reaction was used to determine gene expression levels. Statistical analyses were performed by one way Anova Tukey's post hoc-test. RESULTS According to our results it has been shown that, growths of bacteria could be affected in the presence of hormones which are variable according to incubation period and hormones' concentrations. Up regulation of usp, sfa/foc, cnf1 were shown to be statistically significant (p < 0.05) in the presence of low, medium levels NE and all concentrations of Est. The expression of aer was down regulated significantly in the presence of low (p < 0.001) and medium level of Est; but all levels of NE was shown to be increased the expression of aer significantly (p < 0.05). CONCLUSIONS The results of the present study has shown once more that host factors (norepinephrine and estradiol) could influence the growth of a bacterium as well as gene expressions.
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Affiliation(s)
- Defne Gümüş
- İstanbul Yeni Yüzyl University, Faculty of Medicine, Department of Medical Microbiology, Turkey.
| | - Fatma Kalaycı Yüksek
- İstanbul Yeni Yüzyl University, Faculty of Medicine, Department of Medical Microbiology, Turkey
| | - Özlem Sefer
- İstanbul Yeni Yüzyl University, Faculty of Arts & Sciences, Department of Molecular Biology and Genetics, Istanbul, Turkey
| | - Emre Yörük
- İstanbul Yeni Yüzyl University, Faculty of Arts & Sciences, Department of Molecular Biology and Genetics, Istanbul, Turkey
| | - Gülşen Uz
- İstanbul Yeni Yüzyl University, Faculty of Arts & Sciences, Department of Molecular Biology and Genetics, Istanbul, Turkey
| | - Mine Anğ Küçüker
- İstanbul Yeni Yüzyl University, Faculty of Medicine, Department of Medical Microbiology, Turkey
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Affiliation(s)
- Lionel A Mandell
- From McMaster University, Hamilton, ON, Canada (L.A.M.); and Weill Cornell Medical College, New York (M.S.N.)
| | - Michael S Niederman
- From McMaster University, Hamilton, ON, Canada (L.A.M.); and Weill Cornell Medical College, New York (M.S.N.)
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35
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Dickson RP. Kudzu and sleeper cells: the varied ecology of respiratory infections. Eur Respir J 2018; 52:52/4/1801607. [PMID: 30361265 DOI: 10.1183/13993003.01607-2018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 08/24/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Robert P Dickson
- Division of Pulmonary and Critical Care Medicine, Dept of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA .,Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI, USA
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36
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Lyte M, Villageliú DN, Crooker BA, Brown DR. Symposium review: Microbial endocrinology-Why the integration of microbes, epithelial cells, and neurochemical signals in the digestive tract matters to ruminant health. J Dairy Sci 2018; 101:5619-5628. [PMID: 29550113 DOI: 10.3168/jds.2017-13589] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 02/07/2018] [Indexed: 12/14/2022]
Abstract
The union of microbiology and neurobiology, which has been termed microbial endocrinology, is defined as the study of the ability of microorganisms to produce and respond to neurochemicals that originate either within the microorganisms themselves or within the host they inhabit. It serves as the basis for an evolutionarily derived method of communication between a host and its microbiota. Mechanisms elucidated by microbial endocrinology give new insight into the ways the microbiota can affect host stress, metabolic efficiency, resistance to disease, and other factors that may prove relevant to the dairy industry.
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Affiliation(s)
- Mark Lyte
- Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames 50011.
| | - Daniel N Villageliú
- Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames 50011
| | - Brian A Crooker
- Department of Animal Science, University of Minnesota, St. Paul 55108
| | - David R Brown
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul 55108
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37
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The Microbial Endocrinology of Pseudomonas aeruginosa: Inflammatory and Immune Perspectives. Arch Immunol Ther Exp (Warsz) 2018. [PMID: 29541797 DOI: 10.1007/s00005-018-0510-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Pseudomonas aeruginosa is a major pathogen responsible for both acute and chronic infection. Known as a colonising pathogen of the cystic fibrosis (CF) lung, it is implicated in other settings such as bronchiectasis. It has the ability to cause acute disseminated or localised infection particularly in the immunocompromised. Human hormones have been highlighted as potential regulators of bacterial virulence through crosstalk between analogous "quorum sensing" (QS) systems present in the bacteria that respond to mammalian hormones. Pseudomonas aeruginosa is known to utilise interconnected QS systems to coordinate its virulence and evade various aspects of the host immune system activated in response to infection. Several human hormones demonstrate an influence on P. aeruginosa growth and virulence. This inter-kingdom signalling, termed "microbial endocrinology" has important implications for host-microbe interaction during infection and, potentially opens up novel avenues for therapeutic intervention. This phenomenon, supported by the existence of sexual dichotomies in both microbial infection and chronic lung diseases such as CF is potentially explained by sex hormones and their influence on the infective process. This review summarises our current understanding of the microbial endocrinology of P. aeruginosa, including its endogenous QS systems and their intersection with human endocrinology, pathogenesis of infection and the host immune system.
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38
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Affiliation(s)
- Robert P Dickson
- 1 Department of Internal Medicine University of Michigan Medical School Ann Arbor, Michigan and
- 2 Michigan Center for Integrative Research in Critical Care Ann Arbor, Michigan
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39
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Norepinephrine in Combination with Antibiotic Therapy Increases both the Bacterial Replication Rate and Bactericidal Activity. Antimicrob Agents Chemother 2018; 62:AAC.02257-17. [PMID: 29378716 DOI: 10.1128/aac.02257-17] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 01/22/2018] [Indexed: 11/20/2022] Open
Abstract
We previously demonstrated that the rate and extent of an antimicrobial agent's bactericidal effects were coupled to the bacterial replication rate, the latter of which was modulated with the sodium chloride concentration. Herein, we describe the results from a 24-h one-compartment in vitro infection model study that was designed to demonstrate that an antimicrobial agent's bactericidal effects could be amplified when it is administered with a pharmaceutical agent that increases the bacterial replication rate. The antimicrobial and growth-promoting agents selected were levofloxacin and norepinephrine, respectively. The challenge isolate was Escherichia coli JMI 21711R (levofloxacin MIC, 8 mg/liter). Within the in vitro infection model, a human levofloxacin concentration-time profile (half-life, 7 h) was simulated and the challenge isolate was subjected to an ineffective monotherapy exposure (free-drug area under the concentration-time curve over 24 h divided by the MIC [AUC/MIC] ratio of 6) with and without norepinephrine as a continuous infusion (275 mg/liter). Samples were collected from the model during the course of the study for bacterial density determinations and drug concentration assay using liquid chromatography-tandem mass spectrometry (LC-MS/MS). As expected, the norepinephrine and no-treatment control arms failed immediately, followed by the levofloxacin monotherapy arm, which failed slowly over time. The levofloxacin-epinephrine regimen resulted in a 2-log10 CFU reduction in bacterial density over the first 6 to 8 h of the study, which was followed by regrowth of a highly levofloxacin-resistant subpopulation (MIC, 64 mg/liter). These data demonstrate that increasing the rate of bacterial replication with a pharmaceutical product in combination with antimicrobial therapy represents an opportunity to increase the rate and magnitude of bactericidal effect.
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40
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Kim KH, Kim SH, Her C. Methidathion Poisoning. Korean J Crit Care Med 2017; 32:363-369. [PMID: 31723659 PMCID: PMC6786676 DOI: 10.4266/kjccm.2016.00073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 05/17/2016] [Accepted: 08/12/2016] [Indexed: 11/30/2022] Open
Abstract
Although methidathion is an organophosphate insecticide, it is different from the other organophosphates in terms of toxicity. Because of its relatively high fat solubility, the apparent volume of methidathion distribution throughout the body is very high, indicating that hemoperfusion is not effective in removing this organophosphate from the body. Redistribution of methidathion from fat to blood can also occur when plasma levels diminish. Additionally, acetylcholinesterase aging, which is the loss of an alkyl side chain that prevents reactivation by oximes, is very rapid so that the effective reactivation by oximes is thwarted. Thus, methidathion’s effect on acetylcholinesterase inhibition is long lasting, particularly with a high dose. In addition to its parasympatholytic effect and ability to induce muscle paralysis, methidathion poisoning is associated with a profound and long-lasting circulatory collapse due to sympathetic ganglion blockade. This report presents the case of a 55-year-old man who accidentally ingested a high dose of methidathion. He later developed enteroinvasive aspergillosis infection-induced multiple bowel perforations on two separate occasions while on mechanical ventilator support, resulting in a fatal outcome. The renin-angiotensin axis activated by sympathetic ganglion blockade may have reduced the patient’s splanchnic blood flow, contributing to translocation of endotoxin. Also, the effect of excessive acetylcholine on non-neuronal acetylcholine receptors may have contributed to the development of fatal enteroinvasive aspergillosis in this patient.
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Affiliation(s)
- Ki Hoon Kim
- Department of Surgery, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Se Hun Kim
- Department of Anesthesiology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Charles Her
- Department of Anesthesiology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
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41
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Desired Turbulence? Gut-Lung Axis, Immunity, and Lung Cancer. JOURNAL OF ONCOLOGY 2017; 2017:5035371. [PMID: 29075294 PMCID: PMC5623803 DOI: 10.1155/2017/5035371] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/30/2017] [Accepted: 08/03/2017] [Indexed: 02/08/2023]
Abstract
The microbiota includes different microorganisms consisting of bacteria, fungi, viruses, and protozoa distributed over many human body surfaces including the skin, vagina, gut, and airways, with the highest density found in the intestine. The gut microbiota strongly influences our metabolic, endocrine, and immune systems, as well as both the peripheral and central nervous systems. Recently, a dialogue between the gut and lung microbiota has been discovered, suggesting that changes in one compartment could impact the other compartment, whether in relation to microbial composition or function. Further, this bidirectional axis is evidenced in an, either beneficial or malignant, altered immune response in one compartment following changes in the other compartment. Stimulation of the immune system arises from the microbial cells themselves, but also from their metabolites. It can be either direct or mediated by stimulated immune cells in one site impacting the other site. Additionally, this interaction may lead to immunological boost, assisting the innate immune system in its antitumour response. Thus, this review offers an insight into the composition of these sites, the gut and the lung, their role in shaping the immune system, and, finally, their role in the response to lung cancer.
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42
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Evsyutina Y, Komkova I, Zolnikova O, Tkachenko P, Ivashkin V. Lung microbiome in healthy and diseased individuals. World J Respirol 2017; 7:39-47. [DOI: 10.5320/wjr.v7.i2.39] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 03/15/2017] [Accepted: 04/17/2017] [Indexed: 02/06/2023] Open
Abstract
The data on quantitative and qualitative microbial composition of the respiratory tract of healthy individuals revealed significant differences when compared with the microbiota of patients suffering from respiratory diseases. Possible etiological role of microbiota in pulmonary diseases as well as drug resistance development is of profound interest nowadays. Numerous studies have provided evidence confirming the relationship between gut microbiome and those of lungs. This relationship could explain how changes in the microbial communities in one organ may lead to pathological changes in the other. Till date, some progress has been made in the study of the biological properties of probiotic bacteria, considering their modulating effect on inflammatory immune response. The use of probiotics which exhibits an immunomodulatory potential looks promising.
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Abstract
Microbial endocrinology represents the intersection of two seemingly disparate fields, microbiology and neurobiology, and is based on the shared presence of neurochemicals that are exactly the same in host as well as in the microorganism. The ability of microorganisms to not only respond to, but also produce, many of the same neurochemicals that are produced by the host, such as during periods of stress, has led to the introduction of this evolutionary-based mechanism which has a role in the pathogenesis of infectious disease. The consideration of microbial endocrinology-based mechanisms has demonstrated, for example, that the prevalent use of catecholamine-based synthetic drugs in the clinical setting contributes to the formation of biofilms in indwelling medical devices. Production of neurochemicals by microorganisms most often employs the same biosynthetic pathways as those utilized by the host, indicating that acquisition of host neurochemical-based signaling system in the host may have been acquired due to lateral gene transfer from microorganisms. That both host and microorganism produce and respond to the very same neurochemicals means that there is bidirectionality contained with the theoretical underpinnings of microbial endocrinology. This can be seen in the role of microbial endocrinology in the microbiota-gut-brain axis and its relevance to infectious disease. Such shared pathways argue for a role of microorganism-neurochemical interactions in infectious disease.
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44
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Huffnagle GB, Dickson RP, Lukacs NW. The respiratory tract microbiome and lung inflammation: a two-way street. Mucosal Immunol 2017; 10:299-306. [PMID: 27966551 PMCID: PMC5765541 DOI: 10.1038/mi.2016.108] [Citation(s) in RCA: 313] [Impact Index Per Article: 44.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 10/17/2016] [Indexed: 02/04/2023]
Abstract
The lungs are not sterile or free from bacteria; rather, they harbor a distinct microbiome whose composition is driven by different ecological rules than for the gastrointestinal tract. During disease, there is often a shift in community composition towards Gammaproteobacteria, the bacterial class that contains many common lung-associated gram-negative "pathogens." Numerous byproducts of host inflammation are growth factors for these bacteria. The extracellular nutrient supply for bacteria in the lungs, which is severely limited during health, markedly increases due to the presence of mucus and vascular permeability. While Gammaproteobacteria benefit from airway inflammation, they also encode molecular components that promote inflammation, potentially creating a cyclical inflammatory mechanism. In contrast, Prevotella species that are routinely acquired via microaspiration from the oral cavity may participate in immunologic homeostasis of the airways.vAreas of future research include determining for specific lung diseases (1) whether an altered lung microbiome initiates disease pathogenesis, promotes chronic inflammation, or is merely a marker of injury and inflammation, (2) whether the lung microbiome can be manipulated therapeutically to change disease progression, (3) what molecules (metabolites) generated during an inflammatory response promote cross-kingdom signaling, and (4) how the lung "ecosystem" collapses during pneumonia, to be dominated by a single pathogen.
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Affiliation(s)
- GB Huffnagle
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA
- Mary H. Weiser Food Allergy Center, University of Michigan Medical School, Ann Arbor, MI, USA
| | - RP Dickson
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
| | - NW Lukacs
- Mary H. Weiser Food Allergy Center, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI, USA
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45
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Ferreira JA, Bissell BD. Misdirected Sympathy: The Role of Sympatholysis in Sepsis and Septic Shock. J Intensive Care Med 2017; 33:74-86. [DOI: 10.1177/0885066616689548] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The spectrum of sepsis and septic shock remains a highly prevalent disease state, carrying a high risk of morbidity and mortality. The sympathetic nervous system (SNS) plays an important role in this initial cascade, enabling the host to respond to invading pathogens; however, prolonged activation can become pathological. The potential for unregulated sympathetic tone to become of detriment in patients with sepsis has fueled interest in the role and impact of sympatholysis, the selective inhibition of sympathetic tone. The cornerstone of septic shock therapy for decades has been the supplementation of catecholamines and thus potential further perpetuation of this sympathetic dysregulation. Although the theory of sympatholysis circulates around cardiovascular effects and stroke volume optimization, the impact of augmenting the SNS may extend well beyond this, including the impacts on the immune system, inflammatory cascade, and even gene transcription. Presently, the most robust clinical evidence involves the use of the cardioselective β-blocker esmolol in patients with septic shock with persistent tachycardia secondary to catecholamine use. Evidence is isolated only to animal models with α-agonists. Future evidence stands to elucidate the balance of sympathetic and autonomic tone as well as the potential role of redirecting and maximizing sympathetic activity.
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Affiliation(s)
- Jason A. Ferreira
- Department of Pharmacy Services, University of Florida Health Jacksonville, Jacksonville, FL, USA
| | - Brittany D. Bissell
- Department of Pharmacy Services, University of Kentucky Healthcare, Lexington, KY, USA
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Koukkidis G, Haigh R, Allcock N, Jordan S, Freestone P. Salad Leaf Juices Enhance Salmonella Growth, Colonization of Fresh Produce, and Virulence. Appl Environ Microbiol 2017; 83:e02416-16. [PMID: 27864173 PMCID: PMC5165107 DOI: 10.1128/aem.02416-16] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 10/24/2016] [Indexed: 11/20/2022] Open
Abstract
We show in this report that traces of juices released from salad leaves as they become damaged can significantly enhance colonization of salad leaves by Salmonella enterica Salad juices in water increased Salmonella growth by 110% over the level seen with the unsupplemented control and in host-like serum-based media by more than 2,400-fold over control levels. In serum-based media, salad juices induced growth of Salmonella via provision of Fe from transferrin, and siderophore production was found to be integral to the growth induction process. Other aspects relevant to salad leaf colonization and retention were enhanced, such as motility and biofilm formation, which were increased over control levels by >220% and 250%, respectively; direct attachment to salad leaves increased by >350% when a salad leaf juice was present. In terms of growth and biofilm formation, the endogenous salad leaf microbiota was largely unresponsive to leaf juice, suggesting that Salmonella gains a marked growth advantage from fluids released by salad leaf damage. Salad leaf juices also enhanced pathogen attachment to the salad bag plastic. Over 5 days of refrigeration (a typical storage time for bagged salad leaves), even traces of juice within the salad bag fluids increased Salmonella growth in water by up to 280-fold over control cultures, as well as enhancing salad bag colonization, which could be an unappreciated factor in retention of pathogens in fresh produce. Collectively, the study data show that exposure to salad leaf juice may contribute to the persistence of Salmonella on salad leaves and strongly emphasize the importance of ensuring the microbiological safety of fresh produce. IMPORTANCE Salad leaves are an important part of a healthy diet but have been associated in recent years with a growing risk of food poisoning from bacterial pathogens such as Salmonella enterica Although this is considered a significant public health problem, very little is known about the behavior of Salmonella in the actual salad bag. We show that juices released from the cut ends of the salad leaves enabled the Salmonella cells to grow in water, even when it was refrigerated. Salad juice exposure also helped the Salmonella cells to attach to the salad leaves so strongly that washing could not remove them. Collectively, the results presented in this report show that exposure to even traces of salad leaf juice may contribute to the persistence of Salmonella on salad leaves as well as priming it for establishing an infection in the consumer.
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Affiliation(s)
- Giannis Koukkidis
- Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, United Kingdom
| | - Richard Haigh
- Department of Genetics, University of Leicester, Leicester, United Kingdom
| | - Natalie Allcock
- Core Biotechnology Services, University of Leicester, Leicester, United Kingdom
| | - Suzanne Jordan
- Campden BRI, Chipping Campden, Gloucestershire, United Kingdom
| | - Primrose Freestone
- Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, United Kingdom
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Inaba M, Matsuda N, Banno H, Jin W, Wachino JI, Yamada K, Kimura K, Arakawa Y. In vitro reduction of antibacterial activity of tigecycline against multidrug-resistant Acinetobacter baumannii with host stress hormone norepinephrine. Int J Antimicrob Agents 2016; 48:680-689. [PMID: 27842757 DOI: 10.1016/j.ijantimicag.2016.09.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/03/2016] [Accepted: 09/15/2016] [Indexed: 12/31/2022]
Abstract
The host stress hormone norepinephrine (NE), also called noradrenaline, is reported to augment bacterial growth and pathogenicity, but few studies have focused on the effect of NE on the activity of antimicrobials. The aim of this study was to clarify whether NE affects antimicrobial activity against multidrug-resistant Acinetobacter baumannii (MDR-AB). Time-kill studies of tigecycline (TIG) and colistin (COL) against MDR-AB as well as assays for factors contributing to antibiotic resistance were performed using MDR-AB clinical strains both in the presence and absence of 10 µM NE. In addition, expression of three efflux pump genes (adeB, adeJ and adeG) in the presence and absence of NE was analysed by quantitative reverse transcription PCR. Viable bacterial cell counts in TIG-supplemented medium containing NE were significantly increased compared with those in medium without NE. In contrast, NE had little influence on viable bacterial cell counts in the presence of COL. NE-supplemented medium resulted in an ca. 2 log increase in growth and in bacterial cell numbers adhering on polyurethane, silicone and polyvinylchloride surfaces. Amounts of biofilm in the presence of NE were ca. 3-fold higher than without NE. Expression of the adeG gene was upregulated 4-6-fold in the presence of NE. In conclusion, NE augmented factors contributing to antibiotic resistance and markedly reduced the in vitro antibacterial activity of TIG against MDR-AB. These findings suggest that NE treatment may contribute to the failure of TIG therapy in patients with MDR-AB infections.
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Affiliation(s)
- Masato Inaba
- Department of Emergency & Critical Care Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan; Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Naoyuki Matsuda
- Department of Emergency & Critical Care Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Hirotsugu Banno
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Wanchun Jin
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Jun-Ichi Wachino
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Keiko Yamada
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Kouji Kimura
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan
| | - Yoshichika Arakawa
- Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8550, Japan.
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Trueba AF, Ritz T, Trueba G. The Role of the Microbiome in the Relationship of Asthma and Affective Disorders. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 874:263-88. [PMID: 26589224 DOI: 10.1007/978-3-319-20215-0_13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The effect of stress, anxiety and other affective states on inflammatory conditions such as asthma is well documented. Although several immune pathway mechanisms have been proposed and studied, they cannot fully explain the relationship. In this chapter we present a new perspective on asthma development and exacerbation that integrates findings on the role of psychological factors in asthma with the microbiome and the hygiene hypothesis in asthma development.
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Affiliation(s)
- Ana F Trueba
- Universidad San Francisco de Quito, Quito, Ecuador.
| | - Thomas Ritz
- Southern Methodist University, Dallas, TX, USA.
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Catecholamines for inflammatory shock: a Jekyll-and-Hyde conundrum. Intensive Care Med 2016; 42:1387-97. [PMID: 26873833 DOI: 10.1007/s00134-016-4249-z] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 01/26/2016] [Indexed: 02/06/2023]
Abstract
Catecholamines are endogenous neurosignalling mediators and hormones. They are integral in maintaining homeostasis by promptly responding to any stressor. Their synthetic equivalents are the current mainstay of treatment in shock states to counteract myocardial depression and/or vasoplegia. These phenomena are related in large part to decreased adrenoreceptor sensitivity and altered adrenergic signalling, with resultant vascular and cardiomyocyte hyporeactivity. Catecholamines are predominantly used in supraphysiological doses to overcome these pathological consequences. However, these adrenergic agents cause direct organ damage and have multiple 'off-target' biological effects on immune, metabolic and coagulation pathways, most of which are not monitored or recognised at the bedside. Such detrimental consequences may contribute negatively to patient outcomes. This review explores the schizophrenic 'Jekyll-and-Hyde' characteristics of catecholamines in critical illness, as they are both necessary for survival yet detrimental in excess. This article covers catecholamine physiology, the pleiotropic effects of catecholamines on various body systems and pathways, and potential alternatives for haemodynamic support and adrenergic modulation in the critically ill.
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Dickson RP. The microbiome and critical illness. THE LANCET. RESPIRATORY MEDICINE 2016; 4:59-72. [PMID: 26700442 PMCID: PMC4752077 DOI: 10.1016/s2213-2600(15)00427-0] [Citation(s) in RCA: 280] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/10/2015] [Accepted: 10/13/2015] [Indexed: 12/12/2022]
Abstract
The central role of the microbiome in critical illness is supported by a half century of experimental and clinical study. The physiological effects of critical illness and the clinical interventions of intensive care substantially alter the microbiome. In turn, the microbiome predicts patients' susceptibility to disease, and manipulation of the microbiome has prevented or modulated critical illness in animal models and clinical trials. This Review surveys the microbial ecology of critically ill patients, presents the facts and unanswered questions surrounding gut-derived sepsis, and explores the radically altered ecosystem of the injured alveolus. The revolution in culture-independent microbiology has provided the tools needed to target the microbiome rationally for the prevention and treatment of critical illness, holding great promise to improve the acute and chronic outcomes of the critically ill.
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Affiliation(s)
- Robert P Dickson
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan Medical School, Ann Arbor, MI, USA.
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