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Liu XY, Li J, Zhang Y, Fan L, Xia Y, Wu Y, Chen J, Zhao X, Gao Q, Xu B, Nie C, Li Z, Tong A, Wang W, Cai J. Kidney microbiota dysbiosis contributes to the development of hypertension. Gut Microbes 2022; 14:2143220. [PMID: 36369946 PMCID: PMC9662196 DOI: 10.1080/19490976.2022.2143220] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Gut microbiota dysbiosis promotes metabolic syndromes (e.g., hypertension); however, the patterns that drive hypertensive pathology and could be targeted for therapeutic intervention are unclear. We hypothesized that gut microbes might translocate to the kidney to trigger hypertension. We aimed to uncover their method of colonization, and thereby how to maintain blood pressure homeostasis. Using combined approaches based on fluorescence in situ hybridization (FISH) and immunofluorescence staining, electron microscopy analysis, bacterial cultures, species identification, and RNA-sequencing-based meta-transcriptomics, we first demonstrated the presence of bacteria within the kidney of spontaneously hypertensive rats (SHRs) and its normotensive counterpart, Wistar-Kyoto rats (WKYs), and patients with hypertension. Translocated renal bacteria were coated with secretory IgA (sIgA) or remained dormant in the L-form. Klebsiella pneumoniae (K.pn) was identified in the kidneys of germ-free (GF) mice following intestinal transplantation, which suggested an influx of gut bacteria into the kidneys. Renal bacterial taxa and their function are associated with hypertension. Hypertensive hosts showed increased richness in the pathobionts of their kidneys, which were partly derived from the gastrointestinal tract. We also demonstrated the indispensable role of bacterial IgA proteases in the translocation of live microbes. Furthermore, Tartary buckwheat dietary intervention reduced blood pressure and modulated the core renal flora-host ecosystem to near-normal states. Taken together, the unique patterns of viable and dormant bacteria in the kidney provide insight into the pathogenesis of non-communicable chronic diseases and cardiometabolic diseases (e.g., hypertension), and may lead to potential novel microbiota-targeted dietary therapies.
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Affiliation(s)
- Xin-Yu Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China,CONTACT Xin-Yu Liu State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Jing Li
- Hypertension Center, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China,Heart Center & Beijing Key Laboratory of Hypertension, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yamei Zhang
- Clinical Genetics Laboratory, Affiliated Hospital &Clinical Medical College of Chengdu University, Chengdu, P.R. China,School of Food and Biological Engineering, Chengdu University, Chengdu, China
| | - Luyun Fan
- Hypertension Center, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yanli Xia
- Clinical Genetics Laboratory, Affiliated Hospital &Clinical Medical College of Chengdu University, Chengdu, P.R. China,School of Food and Biological Engineering, Chengdu University, Chengdu, China
| | - Yongyang Wu
- Department of Urology, Affiliated Sanming First Hospital, Fujian Medical University, Sanming, China
| | - Junru Chen
- Reproductive and Genetic Hospital of CITIC‐Xiangya, Changsha, China
| | - Xinyu Zhao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Qiannan Gao
- Hypertension Center, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Bing Xu
- Department of Proctology, University of Chinese Academy of Sciences-Shenzhen Hospital (Guang Ming), Shenzhen, China
| | - Chunlai Nie
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Zhengyu Li
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Aiping Tong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Wenjie Wang
- Hypertension Center, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jun Cai
- Hypertension Center, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China,Jun Cai Hypertension Center, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China
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Escobar‐Salom M, Torrens G, Jordana‐Lluch E, Oliver A, Juan C. Mammals' humoral immune proteins and peptides targeting the bacterial envelope: from natural protection to therapeutic applications against multidrug‐resistant
Gram
‐negatives. Biol Rev Camb Philos Soc 2022; 97:1005-1037. [PMID: 35043558 PMCID: PMC9304279 DOI: 10.1111/brv.12830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 12/12/2021] [Accepted: 12/15/2021] [Indexed: 12/11/2022]
Abstract
Mammalian innate immunity employs several humoral ‘weapons’ that target the bacterial envelope. The threats posed by the multidrug‐resistant ‘ESKAPE’ Gram‐negative pathogens (Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp.) are forcing researchers to explore new therapeutic options, including the use of these immune elements. Here we review bacterial envelope‐targeting (peptidoglycan and/or membrane‐targeting) proteins/peptides of the mammalian immune system that are most likely to have therapeutic applications. Firstly we discuss their general features and protective activity against ESKAPE Gram‐negatives in the host. We then gather, integrate, and discuss recent research on experimental therapeutics harnessing their bactericidal power, based on their exogenous administration and also on the discovery of bacterial and/or host targets that improve the performance of this endogenous immunity, as a novel therapeutic concept. We identify weak points and knowledge gaps in current research in this field and suggest areas for future work to obtain successful envelope‐targeting therapeutic options to tackle the challenge of antimicrobial resistance.
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Affiliation(s)
- María Escobar‐Salom
- Department of Microbiology University Hospital Son Espases‐Health Research Institute of the Balearic Islands (IdISBa) Carretera de Valldemossa 79 Palma Balearic Islands 07010 Spain
| | - Gabriel Torrens
- Department of Microbiology University Hospital Son Espases‐Health Research Institute of the Balearic Islands (IdISBa) Carretera de Valldemossa 79 Palma Balearic Islands 07010 Spain
| | - Elena Jordana‐Lluch
- Department of Microbiology University Hospital Son Espases‐Health Research Institute of the Balearic Islands (IdISBa) Carretera de Valldemossa 79 Palma Balearic Islands 07010 Spain
| | - Antonio Oliver
- Department of Microbiology University Hospital Son Espases‐Health Research Institute of the Balearic Islands (IdISBa) Carretera de Valldemossa 79 Palma Balearic Islands 07010 Spain
| | - Carlos Juan
- Department of Microbiology University Hospital Son Espases‐Health Research Institute of the Balearic Islands (IdISBa) Carretera de Valldemossa 79 Palma Balearic Islands 07010 Spain
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Yan Q, Hao S, Shi F, Zou Y, Song X, Li L, Li Y, Guo H, He R, Zhao L, Ye G, Tang H. Epigallocatechin-3-gallate reduces liver and immune system damage in Acinetobacter baumannii-loaded mice with restraint stress. Int Immunopharmacol 2021; 92:107346. [PMID: 33412390 DOI: 10.1016/j.intimp.2020.107346] [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: 09/12/2020] [Revised: 12/08/2020] [Accepted: 12/25/2020] [Indexed: 11/28/2022]
Abstract
AIM Due to the significant increase in the antimicrobial resistance of Acinetobacter baumannii (A. baumannii), new drugs to block the progression of infection are strongly needed. Epigallocatechin-3-gallate (EGCG), a major component of green tea, has exhibited potential activity against A. baumannii in vitro. The aim of this study was to determine if EGCG could be used for pretreating stress-related effects, liver damage, and immune dysfunction caused by A. baumannii infection in vivo. METHODS Levels of stress hormones, oxidative stress, liver damage, and immune components were analyzed in a murine infection model in which the mice were pretreated with EGCG for one week then intranasally inoculated with A. baumannii. The mice were restrained for 12 h to promote infection because A. baumannii is an opportunistic pathogen. The pretreatment efficacy of EGCG against A. baumannii in mice was assessed for 24 h after the bacterial infection. RESULTS Restraint stress strengthened the damage from the A. baumannii infection. Pretreatment with EGCG in the murine pneumonia model markedly reduced stress hormones, oxidative metabolites, and proinflammatory cytokine production. EGCG also increased the immune function by increasing the levels of sIgA, T cells and neutrophils after infection. Moreover, pretreatment with EGCG significantly decreased the liver damage by inhibiting the levels of transaminases, oxidative stress metabolites, and cytokines, while maintaining the normal activity of CYP450 enzymes in the liver. CONCLUSION EGCG was efficacious as a preventative treatment for the damage seen in an experimental model of A. baumannii infection.
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Affiliation(s)
- Qiaohua Yan
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Suqi Hao
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Fei Shi
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuanfeng Zou
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Xu Song
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Lixia Li
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Yinglun Li
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Hongrui Guo
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Ran He
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Ling Zhao
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Gang Ye
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China
| | - Huaqiao Tang
- Department of Pharmacy, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
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Ketter PM, Guentzel MN, Schaffer B, Herzig M, Wu X, Montgomery RK, Parida BK, Fedyk CG, Yu JJ, Jorgensen J, Chambers JP, Cap AP, Arulanandam BP. Severe Acinetobacter baumannii sepsis is associated with elevation of pentraxin 3. Infect Immun 2014; 82:3910-8. [PMID: 25001601 PMCID: PMC4187799 DOI: 10.1128/iai.01958-14] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 06/27/2014] [Indexed: 12/18/2022] Open
Abstract
Multidrug-resistant Acinetobacter baumannii is among the most prevalent bacterial pathogens associated with trauma-related wound and bloodstream infections. Although septic shock and disseminated intravascular coagulation have been reported following fulminant A. baumannii sepsis, little is known about the protective host immune response to this pathogen. In this study, we examined the role of PTX3, a soluble pattern recognition receptor with reported antimicrobial properties and stored within neutrophil granules. PTX3 production by murine J774a.1 macrophages was assessed following challenge with A. baumannii strains ATCC 19606 and clinical isolates (CI) 77, 78, 79, 80, and 86. Interestingly, only CI strains 79, 80, and 86 induced PTX3 synthesis in murine J774a.1 macrophages, with greatest production observed following CI 79 and 86 challenge. Subsequently, C57BL/6 mice were challenged intraperitoneally with CI 77 and 79 to assess the role of PTX3 in vivo. A. baumannii strain CI 79 exhibited significantly (P < 0.0005) increased mortality, with an approximate 50% lethal dose (LD50) of 10(5) CFU, while an equivalent dose of CI 77 exhibited no mortality. Plasma leukocyte chemokines (KC, MCP-1, and RANTES) and myeloperoxidase activity were also significantly elevated following challenge with CI 79, indicating neutrophil recruitment/activation associated with significant elevation in serum PTX3 levels. Furthermore, 10-fold-greater PTX3 levels were observed in mouse serum 12 h postchallenge, comparing CI 79 to CI 77 (1,561 ng/ml versus 145 ng/ml), with concomitant severe pathology (liver and spleen) and coagulopathy. Together, these results suggest that elevation of PTX3 is associated with fulminant disease during A. baumannii sepsis.
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Affiliation(s)
| | | | - Beverly Schaffer
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
| | - Maryanne Herzig
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
| | - Xiaowu Wu
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
| | - Robbie K Montgomery
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
| | - Bijaya K Parida
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
| | - Chriselda G Fedyk
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
| | - Jieh-Juen Yu
- University of Texas at San Antonio, San Antonio, Texas, USA
| | - James Jorgensen
- University of Texas Health Science Center, San Antonio, Texas, USA
| | | | - Andrew P Cap
- United States Army Institute for Surgical Research, San Antonio Military Medical Center, San Antonio, Texas, USA
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Kuo KC, Kuo HC, Huang LT, Lin CS, Yang SN. The clinical implications of ABO blood groups in Pseudomonas aeruginosa sepsis in children. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2013; 46:109-14. [DOI: 10.1016/j.jmii.2012.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 10/27/2011] [Accepted: 01/02/2012] [Indexed: 10/28/2022]
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Kuang Z, Hao Y, Walling BE, Jeffries JL, Ohman DE, Lau GW. Pseudomonas aeruginosa elastase provides an escape from phagocytosis by degrading the pulmonary surfactant protein-A. PLoS One 2011; 6:e27091. [PMID: 22069491 PMCID: PMC3206073 DOI: 10.1371/journal.pone.0027091] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 10/10/2011] [Indexed: 01/13/2023] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that causes both acute pneumonitis in immunocompromised patients and chronic lung infections in individuals with cystic fibrosis and other bronchiectasis. Over 75% of clinical isolates of P. aeruginosa secrete elastase B (LasB), an elastolytic metalloproteinase that is encoded by the lasB gene. Previously, in vitro studies have demonstrated that LasB degrades a number of components in both the innate and adaptive immune systems. These include surfactant proteins, antibacterial peptides, cytokines, chemokines and immunoglobulins. However, the contribution of LasB to lung infection by P. aeruginosa and to inactivation of pulmonary innate immunity in vivo needs more clarification. In this study, we examined the mechanisms underlying enhanced clearance of the ΔlasB mutant in mouse lungs. The ΔlasB mutant was attenuated in virulence when compared to the wild-type strain PAO1 during lung infection in SP-A+/+ mice. However, the ΔlasB mutant was as virulent as PAO1 in the lungs of SP-A⁻/⁻ mice. Detailed analysis showed that the ΔlasB mutant was more susceptible to SP-A-mediated opsonization but not membrane permeabilization. In vitro and in vivo phagocytosis experiments revealed that SP-A augmented the phagocytosis of ΔlasB mutant bacteria more efficiently than the isogenic wild-type PAO1. The ΔlasB mutant was found to have a severely reduced ability to degrade SP-A, consequently making it unable to evade opsonization by the collectin during phagocytosis. These results suggest that P. aeruginosa LasB protects against SP-A-mediated opsonization by degrading the collectin.
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Affiliation(s)
- Zhizhou Kuang
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Yonghua Hao
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Brent E. Walling
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Jayme L. Jeffries
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Dennis E. Ohman
- Department of Microbiology and Immunology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, United States of America
| | - Gee W. Lau
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
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Yoon MY, Lee KM, Jeong SH, Kim J, Yoon SS. Heterogeneous virulence potential and high antibiotic resistance of Pseudomonas aeruginosa strains isolated from Korean pneumonia patients. J Microbiol 2010; 48:518-25. [PMID: 20799095 DOI: 10.1007/s12275-010-9388-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Accepted: 04/29/2010] [Indexed: 11/30/2022]
Abstract
Pseudomonas aeruginosa is an opportunistic human pathogen of clinical importance that causes airway infections in immunocompromised patients. Here, we report the virulence-associated characteristics of strains of P. aeruginosa, isolated from the sputa of 25 Korean pneumonia patients. A high degree of genomic plasticity was observed by random amplified polymorphic DNA genotype analysis, suggesting that the infections were caused by strains with diverse genomic backgrounds. Biofilm formation of each isolate was heterogeneous in terms of their relative motilities. In addition, 48% of isolates were defective in the production of 3-oxo-C(12)-HSL (PAI-1), a quorum sensing signal molecule. In these strains, PAI-1-dependent elastase production was correspondingly decreased, suggesting that a large number of strains were presumed to be quorum sensing deficient. Multidrug resistance (MDR) was seen in 56% of the isolates tested, and 44% of the MDR strains were resistant to five or more antibiotics. Taken together, our results provide additional insights into the virulence traits of P. aeruginosa clinical isolates, which will aid in treating P. aeruginosa infections in pneumonia patients.
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Affiliation(s)
- Mi Young Yoon
- Department of Microbiology, Yonsei University College of Medicine, Seoul, Republic of Korea
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