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Feng Y, Wang J, Fan W, Huang B, Qin Z, Tian Z, Geng Y, Huang X, Ouyang P, Chen D, Lai W. Exploitation of multiple host-derived nutrients by the yellow catfish epidermal environment facilitates Vibrio mimicus to sustain infection potency and susceptibility. FISH & SHELLFISH IMMUNOLOGY 2024; 151:109707. [PMID: 38885802 DOI: 10.1016/j.fsi.2024.109707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 06/12/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
Infection with Vibrio mimicus in the Siluriformes has demonstrated a rapid and high infectivity and mortality rate, distinct from other hosts. Our earlier investigations identified necrosis, an inflammatory storm, and tissue remodeling as crucial pathological responses in yellow catfish (Pelteobagrus fulvidraco) infected with V. mimicus. The objective of this study was to further elucidate the impact linking these pathological responses within the host during V. mimicus infection. Employing metabolomics and transcriptomics, we uncovered infection-induced dense vacuolization of perimysium; Several genes related to nucleosidase and peptidase activities were significantly upregulated in the skin and muscles of infected fish. Concurrently, the translation processes of host cells were impaired. Further investigation revealed that V. mimicus completes its infection process by enhancing its metabolism, including the utilization of oligopeptides and nucleotides. The high susceptibility of yellow catfish to V. mimicus infection was associated with the composition of its body surface, which provided a microenvironment rich in various nucleotides such as dIMP, dAMP, deoxyguanosine, and ADP, in addition to several amino acids and peptides. Some of these metabolites significantly boost V. mimicus growth and motility, thus influencing its biological functions. Furthermore, we uncovered an elevated expression of gangliosides on the surface of yellow catfish, aiding V. mimicus adhesion and increasing its infection risk. Notably, we observed that the skin and muscles of yellow catfish were deficient in over 25 polyunsaturated fatty acids, such as Eicosapentaenoic acid, 12-oxo-ETE, and 13-Oxo-ODE. These substances play a role in anti-inflammatory mechanisms, possibly contributing to the immune dysregulation observed in yellow catfish. In summary, our study reveals a host immune deviation phenomenon that promotes bacterial colonization by increasing nutrient supply. It underscores the crucial factors rendering yellow catfish highly susceptible to V. mimicus, indicating that host nutritional sources not only enable the establishment and maintenance of infection within the host but also aid bacterial survival under immune pressure, ultimately completing its lifecycle.
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Affiliation(s)
- Yang Feng
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China; Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu, 611731, Sichuan, China
| | - Jiao Wang
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Wei Fan
- NeiJiang Academy of Agricultural Sciences, Neijiang, Sichuan, 641000, China
| | - Bowen Huang
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Zhenyang Qin
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Ziqi Tian
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Yi Geng
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China.
| | - Xiaoli Huang
- Department of Aquaculture, College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Ping Ouyang
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Defang Chen
- Department of Aquaculture, College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
| | - Weimin Lai
- College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, Sichuan, China
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Nickerson R, Thornton CS, Johnston B, Lee AHY, Cheng Z. Pseudomonas aeruginosa in chronic lung disease: untangling the dysregulated host immune response. Front Immunol 2024; 15:1405376. [PMID: 39015565 PMCID: PMC11250099 DOI: 10.3389/fimmu.2024.1405376] [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: 03/22/2024] [Accepted: 06/14/2024] [Indexed: 07/18/2024] Open
Abstract
Pseudomonas aeruginosa is a highly adaptable opportunistic pathogen capable of exploiting barriers and immune defects to cause chronic lung infections in conditions such as cystic fibrosis. In these contexts, host immune responses are ineffective at clearing persistent bacterial infection, instead driving a cycle of inflammatory lung damage. This review outlines key components of the host immune response to chronic P. aeruginosa infection within the lung, beginning with initial pathogen recognition, followed by a robust yet maladaptive innate immune response, and an ineffective adaptive immune response that propagates lung damage while permitting bacterial persistence. Untangling the interplay between host immunity and chronic P. aeruginosa infection will allow for the development and refinement of strategies to modulate immune-associated lung damage and potentiate the immune system to combat chronic infection more effectively.
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Affiliation(s)
- Rhea Nickerson
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Christina S. Thornton
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Brent Johnston
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Amy H. Y. Lee
- Department of Molecular Biology and Biochemistry, Faculty of Science, Simon Fraser University, Burnaby, BC, Canada
| | - Zhenyu Cheng
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
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Guo X, Yu H, Xiong J, Dai Q, Li Y, Zhang W, Liao X, He X, Zhou H, Zhang K. Pseudomonas aeruginosa two-component system LadS/PA0034 regulates macrophage phagocytosis via fimbrial protein cupA1. mBio 2024; 15:e0061624. [PMID: 38771052 PMCID: PMC11237798 DOI: 10.1128/mbio.00616-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 04/02/2024] [Indexed: 05/22/2024] Open
Abstract
Pseudomonas aeruginosa is one of the most common nosocomial pathogens worldwide, known for its virulence, drug resistance, and elaborate sensor-response network. The primary challenge encountered by pathogens during the initial stages of infection is the immune clearance arising from the host. The resident macrophages of barrier organs serve as the frontline defense against these pathogens. Central to our understanding is the mechanism by which bacteria modify their behavior to circumvent macrophage-mediated clearance, ensuring their persistence and colonization. To successfully evade macrophage-mediated phagocytosis, bacteria must possess an adaptive response mechanism. Two-component systems provide bacteria the agility to navigate diverse environmental challenges, translating external stimuli into cellular adaptive responses. Here, we report that the well-documented histidine kinase, LadS, coupled to a cognate two-component response regulator, PA0034, governs the expression of a vital adhesin called chaperone-usher pathway pilus cupA. The LadS/PA0034 system is susceptible to interference from the reactive oxygen species likely to be produced by macrophages and further lead to a poor adhesive phenotype with scantily cupA pilus, impairing the phagocytosis efficiency of macrophages during acute infection. This dynamic underscores the intriguing interplay: as macrophages deploy reactive oxygen species to combat bacterial invasion, the bacteria recalibrate their exterior to elude these defenses. IMPORTANCE The notoriety of Pseudomonas aeruginosa is underscored by its virulence, drug resistance, and elaborate sensor-response network. Yet, the mechanisms by which P. aeruginosa maneuvers to escape phagocytosis during acute infections remain elusive. This study pinpoints a two-component response regulator, PA0034, coupled with the histidine kinase LadS, and responds to macrophage-derived reactive oxygen species. The macrophage-derived reactive oxygen species can impair the LadS/PA0034 system, resulting in reduced expression of cupA pilus in the exterior of P. aeruginosa. Since the cupA pilus is an important adhesin of P. aeruginosa, its deficiency reduces bacterial adhesion and changes their behavior to adopt a planktonic lifestyle, subsequently inhibiting the phagocytosis of macrophages by interfering with bacterial adhesion. Briefly, reactive oxygen species may act as environmental cues for the LadS/PA0034 system. Upon recognition, P. aeruginosa may transition to a poorly adhesive state, efficiently avoiding engulfment by macrophages.
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Affiliation(s)
- Xiaolong Guo
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Hua Yu
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Junzhi Xiong
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Qian Dai
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Yuanyuan Li
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Wei Zhang
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
- Department of orthopedics, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xiping Liao
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Xiaomei He
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Hongli Zhou
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Kebin Zhang
- Clinical Medical Research Center, The Xinqiao Hospital, Army Medical University, Chongqing, China
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4
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Zhu L, Li J, Yang J, Li X, Lin D, Wang M. Fermentation broth from fruit and vegetable waste works: Reducing the risk of human bacterial pathogens in soil by inhibiting quorum sensing. ENVIRONMENT INTERNATIONAL 2024; 188:108753. [PMID: 38761431 DOI: 10.1016/j.envint.2024.108753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/06/2024] [Accepted: 05/13/2024] [Indexed: 05/20/2024]
Abstract
Fermentation broth from fruit and vegetable waste (FFVW) has demonstrated remarkable ability as a soil amendment and in reducing antibiotic resistance genes (ARGs) pollution. However, the potential of FFVW to mitigate other microbial contamination such as human bacterial pathogens (HBPs) and virulence factor genes (VFGs), which are closely associated with human health, remains unknown. In this study, metagenomic analysis revealed that FFVW reduced the HBPs with high-risk of ARGs and VFGs including Klebsiella pneumoniae (reduced by 40.4 %), Mycobacterium tuberculosis (reduced by 21.4 %) and Streptococcus pneumoniae (reduced by 38.7 %). Correspondingly, VFG abundance in soil decreased from 3.40 copies/cell to 2.99 copies/cell. Further analysis illustrated that these was mainly attributed to the inhibition of quorum sensing (QS). FFVW reduced the abundance of QS signals, QS synthesis genes such as rpaI and luxS, as well as receptor genes such as rpfC and fusK, resulting in a decreased in risk of ARGs and VFGs. The pure culture experiment revealed that the expression of genes related to QS, VFGs, ARGs and mobile genetic elements (MGEs) were downregulated in Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli and K. pneumoniae treated by FFVW, consistent with the result of metagenomic analysis. This study suggested an environmentally friendly approach for controlling soil VFGs/ARGs-carrying HBPs, which is crucial for both soil and human health under the framework of "One Health".
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Affiliation(s)
- Lin Zhu
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jingpeng Li
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Jian Yang
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Xiaodi Li
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Da Lin
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China
| | - Meizhen Wang
- Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, Zhejiang, China; Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
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5
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Chang D, Dela Cruz C, Sharma L. Beneficial and Detrimental Effects of Cytokines during Influenza and COVID-19. Viruses 2024; 16:308. [PMID: 38400083 PMCID: PMC10892676 DOI: 10.3390/v16020308] [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: 12/15/2023] [Revised: 01/24/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
Cytokines are signaling molecules that play a role in myriad processes, including those occurring during diseases and homeostasis. Their homeostatic function begins during embryogenesis and persists throughout life, including appropriate signaling for the cell and organism death. During viral infections, antiviral cytokines such as interferons and inflammatory cytokines are upregulated. Despite the well-known benefits of these cytokines, their levels often correlate with disease severity, linking them to unfavorable outcomes. In this review, we discuss both the beneficial and pathological functions of cytokines and the potential challenges in separating these two roles. Further, we discuss challenges in targeting these cytokines during disease and propose a new method for quantifying the cytokine effect to limit the pathological consequences while preserving their beneficial effects.
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Affiliation(s)
- De Chang
- College of Pulmonary and Critical Care Medicine of Eighth Medical Center, Chinese PLA General Hospital, Beijing 100028, China;
- Department of Pulmonary and Critical Care Medicine of Seventh Medical Center, Chinese PLA General Hospital, Beijing 100028, China
| | - Charles Dela Cruz
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA;
- Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA 15240, USA
| | - Lokesh Sharma
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA;
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6
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Hsu CY, Faisal Mutee A, Porras S, Pineda I, Ahmed Mustafa M, J Saadh M, Adil M, H A Z. Amphiregulin in infectious diseases: Role, mechanism, and potential therapeutic targets. Microb Pathog 2024; 186:106463. [PMID: 38036111 DOI: 10.1016/j.micpath.2023.106463] [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: 10/07/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 12/02/2023]
Abstract
Amphiregulin (AREG) serves as a ligand for the epidermal growth factor receptor (EGFR) and is involved in vital biological functions, including inflammatory responses, tissue regeneration, and immune system function. Upon interaction with the EGFR, AREG initiates a series of signaling cascades necessary for several physiological activities, such as metabolism, cell cycle regulation, and cellular proliferation. Recent findings have provided evidence for the substantial role of AREG in maintaining the equilibrium of homeostasis in damaged tissues and preserving epithelial cell structure in the context of viral infections affecting the lungs. The development of resistance to influenza virus infection depends on the presence of type 1 cytokine responses. Following the eradication of the pathogen, the lungs are subsequently colonized by several cell types that are linked with type 2 immune responses. These cells contribute to the process of repairing and resolving the tissue injury and inflammation caused by infections. Following influenza infection, the activation of AREG promotes the regeneration of bronchial epithelial cells, enhancing the tissue's structural integrity and increasing the survival rate of infected mice. In the same manner, mice afflicted with influenza experience rapid mortality due to a subsequent bacterial infection in the pulmonary region when both bacterial and viral infections manifest concurrently inside the same host. The involvement of AREG in bacterial infections has been demonstrated. The gene AREG experiences increased transcriptional activity inside host cells in response to bacterial infections caused by pathogens such as Escherichia coli and Neisseria gonorrhea. In addition, AREG has been extensively studied as a mitogenic stimulus in epithelial cell layers. Consequently, it is regarded as a prospective contender that might potentially contribute to the observed epithelial cell reactions in helminth infection. Consistent with this finding, mice that lack the AREG gene exhibit a delay in the eradication of the intestinal parasite Trichuris muris. The observed delay is associated with a reduction in the proliferation rate of colonic epithelial cells compared to the infected animals in the control group. The aforementioned findings indicate that AREG plays a pivotal role in facilitating the activation of defensive mechanisms inside the epithelial cells of the intestinal tissue. The precise cellular sources of AREG in this specific context have not yet been determined. However, it is evident that the increased proliferation of the epithelial cell layer in infected mice is reliant on CD4+ T cells. The significance of this finding lies in its demonstration of the crucial role played by the interaction between immunological and epithelial cells in regulating the AREG-EGFR pathway. Additional research is necessary to delve into the cellular origins and signaling mechanisms that govern the synthesis of AREG and its tissue-protective properties, independent of infection.
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Affiliation(s)
- Chou-Yi Hsu
- Department of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan City 71710, Taiwan
| | | | - Sandra Porras
- Facultad de Mecánica, Escuela Superior Politécnica de Chimborazo (ESPOCH), Panamericana Sur km 1 1/2, Riobamba, 060155, Ecuador
| | - Indira Pineda
- Facultad de Salud Pública, Escuela Superior Politécnica de Chimborazo (ESPOCH), Panamericana Sur km 1 1/2, Riobamba, 060155, Ecuador
| | - Mohammed Ahmed Mustafa
- Department of Medical Laboratory Technology, Imam Jaafar AL-Sadiq University, Iraq; Department of Pathological Analyzes, College of Applied Sciences, University of Samarra, Iraq.
| | - Mohamed J Saadh
- Faculty of Pharmacy, Middle East University, Amman, 11831, Jordan; Applied Science Research Center, Applied Science Private University, Amman, Jordan
| | | | - Zainab H A
- Department of Pharmacy, Al-Zahrawi University College, Karbala, Iraq
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7
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Li YX, Yue SJ, Zheng YF, Huang P, Nie YF, Hao XR, Zhang HY, Wang W, Hu HB, Zhang XH. Economical Production of Phenazine-1-carboxylic Acid from Glycerol by Pseudomonas chlororaphis Using Cost-Effective Minimal Medium. BIOLOGY 2023; 12:1292. [PMID: 37887002 PMCID: PMC10604798 DOI: 10.3390/biology12101292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023]
Abstract
Phenazine compounds are widely used in agricultural control and the medicine industry due to their high inhibitory activity against pathogens and antitumor activity. The green and sustainable method of synthesizing phenazine compounds through microbial fermentation often requires a complex culture medium containing tryptone and yeast extract, and its cost is relatively high, which greatly limits the large-scale industrial production of phenazine compounds by fermentation. The aim of this study was to develop a cost-effective minimal medium for the efficient synthesis of phenazine compounds by Pseudomonas chlororaphis. Through testing the minimum medium commonly used by Pseudomonas, an ME medium for P. chlororaphis with a high production of phenazine compounds was obtained. Then, the components of the ME medium and the other medium were compared and replaced to verify the beneficial promoting effect of Fe2+ and NH4+ on phenazine compounds. A cost-effective general defined medium (GDM) using glycerol as the sole carbon source was obtained by optimizing the composition of the ME medium. Using the GDM, the production of phenazine compounds by P. chlororaphis reached 1073.5 mg/L, which was 1.3 times that achieved using a complex medium, while the cost of the GDM was only 10% that of a complex medium (e.g., the KB medium). Finally, by engineering the glycerol metabolic pathway, the titer of phenazine-1-carboxylic acid reached the highest level achieved using a minimum medium so far. This work demonstrates how we systematically analyzed and optimized the composition of the medium and integrated a metabolic engineering method to obtain the most cost-effective fermentation strategy.
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Affiliation(s)
- Yu-Xuan Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
| | - Sheng-Jie Yue
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
| | - Yi-Fan Zheng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
| | - Peng Huang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
| | - Yan-Fang Nie
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
| | - Xiang-Rui Hao
- Shanghai Nong Le Biological Products Company Limited (NLBP), Shanghai 200240, China
| | - Hong-Yan Zhang
- Shanghai Nong Le Biological Products Company Limited (NLBP), Shanghai 200240, China
| | - Wei Wang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
| | - Hong-Bo Hu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
- Shanghai Nongle Joint R&D Center on Biopesticides and Biofertilizers, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xue-Hong Zhang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; (Y.-X.L.); (S.-J.Y.); (P.H.); (Y.-F.N.)
- Shanghai Nongle Joint R&D Center on Biopesticides and Biofertilizers, Shanghai Jiao Tong University, Shanghai 200240, China
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8
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Zhou Y, Xu B, Wang L, Zhang C, Li S. Fine Particulate Matter Perturbs the Pulmonary Microbiota in Broiler Chickens. Animals (Basel) 2023; 13:2862. [PMID: 37760262 PMCID: PMC10525718 DOI: 10.3390/ani13182862] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/18/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
(1) Fine particulate matter (PM2.5) seriously affects the respiratory tract health of both animals and humans. Growing evidence indicates that the pulmonary microbiota is involved in the development of respiratory tract health; however, there is still much that is unknown about the specific changes of pulmonary microbiota caused by PM2.5 in broilers. (2) In this experiment, a total of 48 broilers were randomly divided into a control group and PM-exposure group. The experiment lasted for 21 days. Microbiota, inflammation biomarkers, and histological markers in the lungs were determined. (3) On the last day of the experiment, PM significantly disrupted the structure of lung tissue and induced chronic pulmonary inflammation by increasing IL-6, TNFα, and IFNγ expression and decreasing IL-10 expression. PM exposure significantly altered the α and β diversity of pulmonary microbiota. At the phylum level, PM exposure significantly decreased the Firmicutes abundance and increased the abundance of Actinobacteria and Proteobacteria. At the genus level, PM exposure significantly increased the abundance of Rhodococcus, Achromobacter, Pseudomonas, and Ochrobactrum. We also observed positive associations of the above altered genera with lung TNFα and IFNγ expression. (4) The results suggest that PM perturbs the pulmonary microbiota and induces chronic inflammation, and the pulmonary microbiota possibly contributes to the development of lung inflammation.
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Affiliation(s)
| | | | | | | | - Shaoyu Li
- Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China; (Y.Z.); (B.X.); (L.W.); (C.Z.)
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9
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Pollock J, Goeminne PC. Eosinophils in Bronchiectasis: A U-Turn for Bronchiectasis Management. Chest 2023; 164:561-563. [PMID: 37689463 DOI: 10.1016/j.chest.2023.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 09/11/2023] Open
Affiliation(s)
- Jennifer Pollock
- Division of Molecular and Clinical Medicine, Ninewells Teaching Hospital, Dundee, Scotland
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10
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Llanos A, Achard P, Bousquet J, Lozano C, Zalacain M, Sable C, Revillet H, Murris M, Mittaine M, Lemonnier M, Everett M. Higher levels of Pseudomonas aeruginosa LasB elastase expression are associated with early-stage infection in cystic fibrosis patients. Sci Rep 2023; 13:14208. [PMID: 37648735 PMCID: PMC10468528 DOI: 10.1038/s41598-023-41333-9] [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: 02/28/2023] [Accepted: 08/24/2023] [Indexed: 09/01/2023] Open
Abstract
Pseudomonas aeruginosa is a common pathogen in cystic fibrosis (CF) patients and a major contributor to progressive lung damage. P. aeruginosa elastase (LasB), a key virulence factor, has been identified as a potential target for anti-virulence therapy. Here, we sought to differentiate the P. aeruginosa isolates from early versus established stages of infection in CF patients and to determine if LasB was associated with either stage. The lasB gene was amplified from 255 P. aeruginosa clinical isolates from 70 CF patients from the Toulouse region (France). Nine LasB variants were identified and 69% of the isolates produced detectable levels of LasB activity. Hierarchical clustering using experimental and clinical data distinguished two classes of isolates, designated as 'Early' and 'Established' infection. Multivariate analysis revealed that the isolates from the Early infection class show higher LasB activity, fast growth, tobramycin susceptibility, non-mucoid, pigmented colonies and wild-type lasR genotype. These traits were associated with younger patients with polymicrobial infections and high pFEV1. Our findings show a correlation between elevated LasB activity in P. aeruginosa isolates and early-stage infection in CF patients. Hence, it is this patient group, prior to the onset of chronic disease, that may benefit most from novel therapies targeting LasB.
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Affiliation(s)
- Agustina Llanos
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France.
| | - Pauline Achard
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
| | - Justine Bousquet
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
| | - Clarisse Lozano
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
| | - Magdalena Zalacain
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
| | - Carole Sable
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
| | - Hélène Revillet
- Service de Bactériologie-Hygiène, CHU de Toulouse, Toulouse, France
- IRSD, INSERM, Université de Toulouse, INRAE, ENVT, UPS, Toulouse, France
| | - Marlène Murris
- Adult Cystic Fibrosis Centre, Pulmonology Unit, Hôpital Larrey, CHU de Toulouse, Toulouse, France
| | | | - Marc Lemonnier
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
| | - Martin Everett
- Antabio SAS, Biostep, 436, rue Pierre et Marie Curie, 31760, Labège, France
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11
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Harmon C, Zaborowski A, Moore H, St Louis P, Slattery K, Duquette D, Scanlan J, Kane H, Kunkemoeller B, McIntyre CL, Scannail AN, Moran B, Anderson AC, Winter D, Brennan D, Brehm MA, Lynch L. γδ T cell dichotomy with opposing cytotoxic and wound healing functions in human solid tumors. NATURE CANCER 2023; 4:1122-1137. [PMID: 37474835 DOI: 10.1038/s43018-023-00589-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 06/05/2023] [Indexed: 07/22/2023]
Abstract
γδ T cells are important tissue-resident, innate T cells that are critical for tissue homeostasis. γδ cells are associated with positive prognosis in most tumors; however, little is known about their heterogeneity in human cancers. Here, we phenotyped innate and adaptive cells in human colorectal (CRC) and endometrial cancer. We found striking differences in γδ subsets and function in tumors compared to normal tissue, and in the γδ subsets present in tumor types. In CRC, an amphiregulin (AREG)-producing subset emerges, while endometrial cancer is infiltrated by cytotoxic cells. In humanized CRC models, tumors induced this AREG phenotype in Vδ1 cells after adoptive transfer. To exploit the beneficial roles of γδ cells for cell therapy, we developed an expansion method that enhanced cytotoxic function and boosted metabolic flexibility, while eliminating AREG production, achieving greater tumor infiltration and tumor clearance. This method has broad applications in cellular therapy as an 'off-the-shelf' treatment option.
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Affiliation(s)
- Cathal Harmon
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Alexandra Zaborowski
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland
| | - Haim Moore
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Pamela St Louis
- Program in Molecular Medicine and the Diabetes Center of Excellence, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Karen Slattery
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Danielle Duquette
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - John Scanlan
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Harry Kane
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Britta Kunkemoeller
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Claire L McIntyre
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Aine Ni Scannail
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA
- Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Bruce Moran
- Department of Pathology, St. Vincent's University Hospital, Dublin, Ireland
| | - Ana C Anderson
- Evergrande Center for Immunologic Diseases and Ann Romney Center for Neurologic Diseases, Harvard Medical School and Brigham & Women's Hospital, Boston, MA, USA
| | - Des Winter
- Centre for Colorectal Disease, St. Vincent's University Hospital, Dublin, Ireland
| | - Donal Brennan
- Gynecological Oncology Group, School of Medicine, University College Dublin, Dublin, Ireland
| | - Michael A Brehm
- Program in Molecular Medicine and the Diabetes Center of Excellence, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Lydia Lynch
- Department of Endocrinology, Brigham & Women's Hospital, Boston, MA, USA.
- Department of Medicine, Harvard Medical School, Boston, MA, USA.
- School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland.
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12
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Kopp EB, Agaronyan K, Licona-Limón I, Nish SA, Medzhitov R. Modes of type 2 immune response initiation. Immunity 2023; 56:687-694. [PMID: 37044059 DOI: 10.1016/j.immuni.2023.03.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 04/14/2023]
Abstract
Type 2 immunity defends against macro-parasites and can cause allergic diseases. Our understanding of the mechanisms governing the initiation of type 2 immunity is limited, whereas we know more about type 1 immune responses. Type 2 immunity can be triggered by a wide array of inducers that do not share common features and via diverse pathways and mechanisms. To address the complexity of the type 2 initiation pathways, we suggest a framework that conceptualizes different modes of induction of type 2 immunity. We discuss categories of type 2 inducers and their immunogenicity, types of tissue perturbations that are caused by these inducers, sensing strategies for the initiation of Th2 immune responses, and categorization of the signals that are produced in response to type 2 challenges. We describe tissue-specific examples of functional disruption that could lead to type 2 inflammation and propose that different sensing strategies that operate at the tissue level converge on the initiation of type 2 immune responses.
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Affiliation(s)
- Elizabeth B Kopp
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Karen Agaronyan
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA; Howard Hughes Medical Institute, New Haven, CT 06510, USA
| | - Ileana Licona-Limón
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Simone A Nish
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Ruslan Medzhitov
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA; Howard Hughes Medical Institute, New Haven, CT 06510, USA; Tananbaum Center for Theoretical and Analytical Human Biology, Yale University School of Medicine, New Haven, CT, USA.
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13
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Geyer J, Krupa KA, Harris ZM, Sun Y, Sharma L, Würstle S, Hu B, Stanley G, Rajagopalan G, Pellot E, Koff JL, Robinson JB. A Novel Zinc (II) Porphyrin Is Synergistic with PEV2 Bacteriophage against Pseudomonas aeruginosa Infections. Antibiotics (Basel) 2023; 12:735. [PMID: 37107097 PMCID: PMC10135120 DOI: 10.3390/antibiotics12040735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Pseudomonas aeruginosa (PsA) is an opportunistic bacterial pathogen that causes life-threatening infections in individuals with compromised immune systems and exacerbates health concerns for those with cystic fibrosis (CF). PsA rapidly develops antibiotic resistance; thus, novel therapeutics are urgently needed to effectively combat this pathogen. Previously, we have shown that a novel cationic Zinc (II) porphyrin (ZnPor) has potent bactericidal activity against planktonic and biofilm-associated PsA cells, and disassembles the biofilm matrix via interactions with eDNA In the present study, we report that ZnPor caused a significant decrease in PsA populations in mouse lungs within an in vivo model of PsA pulmonary infection. Additionally, when combined with an obligately lytic phage PEV2, ZnPor at its minimum inhibitory concentration (MIC) displayed synergy against PsA in an established in vitro lung model resulting in greater protection of H441 lung cells versus either treatment alone. Concentrations above the minimum bactericidal concentration (MBC) of ZnPor were not toxic to H441 cells; however, no synergy was observed. This dose-dependent response is likely due to ZnPor's antiviral activity, reported herein. Together, these findings show the utility of ZnPor alone, and its synergy with PEV2, which could be a tunable combination used in the treatment of antibiotic-resistant infections.
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Affiliation(s)
- Jessica Geyer
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
| | - Kristen A. Krupa
- Department of Chemical and Materials Engineering, University of Dayton, Dayton, OH 45469, USA
- Integrated Science and Engineering Center, University of Dayton, Dayton, OH 45469, USA
| | - Zachary M. Harris
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Ying Sun
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Lokesh Sharma
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Silvia Würstle
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
- School of Medicine, Technical University of Munich, 81675 Munich, Germany
| | - Buqu Hu
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Gail Stanley
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Govindarajan Rajagopalan
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Erin Pellot
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
| | - Jonathan L. Koff
- Section of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jayne B. Robinson
- Department of Biology, University of Dayton, Dayton, OH 45469, USA
- Integrated Science and Engineering Center, University of Dayton, Dayton, OH 45469, USA
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14
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Pellielo G, Agyapong ED, Pinton P, Rimessi A. Control of mitochondrial functions by Pseudomonas aeruginosa in cystic fibrosis. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2023; 377:19-43. [PMID: 37268349 DOI: 10.1016/bs.ircmb.2023.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cystic fibrosis (CF) is a genetic disease characterized by mutations of cystic fibrosis transmembrane conductance regulator (CFTR) gene, which lead to a dysfunctional chloride and bicarbonate channel. Abnormal mucus viscosity, persistent infections and hyperinflammation that preferentially affect the airways, referred to the pathogenesis of CF lung disease. It has largely demonstrated that Pseudomonas aeruginosa (P. aeruginosa) represents the most important pathogen that affect CF patients, leading to worsen inflammation by stimulating pro-inflammatory mediators release and tissue destruction. The conversion to mucoid phenotype and formation of biofilms, together with the increased frequency of mutations, are only few changes that characterize the P. aeruginosa's evolution during CF lung chronic infection. Recently, mitochondria received increasing attention due to their involvement in inflammatory-related diseases, including in CF. Alteration of mitochondrial homeostasis is sufficient to stimulate immune response. Exogenous or endogenous stimuli that perturb mitochondrial activity are used by cells, which, through the mitochondrial stress, potentiate immunity programs. Studies show the relationship between mitochondria and CF, supporting the idea that mitochondrial dysfunction endorses the exacerbation of inflammatory responses in CF lung. In particular, evidences suggest that mitochondria in CF airway cells are more susceptible to P. aeruginosa infection, with consequent detrimental effects that lead to amplify the inflammatory signals. This review discusses the evolution of P. aeruginosa in relationship with the pathogenesis of CF, a fundamental step to establish chronic infection in CF lung disease. Specifically, we focus on the role of P. aeruginosa in the exacerbation of inflammatory response, by triggering mitochondria in CF.
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Affiliation(s)
- Giulia Pellielo
- Department of Medical Sciences, Section of Experimental Medicine, Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy
| | - Esther Densu Agyapong
- Department of Medical Sciences, Section of Experimental Medicine, Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy
| | - Paolo Pinton
- Department of Medical Sciences, Section of Experimental Medicine, Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy; Center of research for innovative therapies in cystic fibrosis, University of Ferrara, Ferrara, Italy
| | - Alessandro Rimessi
- Department of Medical Sciences, Section of Experimental Medicine, Laboratory for Technologies of Advanced Therapies, University of Ferrara, Ferrara, Italy; Center of research for innovative therapies in cystic fibrosis, University of Ferrara, Ferrara, Italy.
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15
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Sutherland TE, Dyer DP, Allen JE. The extracellular matrix and the immune system: A mutually dependent relationship. Science 2023; 379:eabp8964. [PMID: 36795835 DOI: 10.1126/science.abp8964] [Citation(s) in RCA: 92] [Impact Index Per Article: 92.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 12/22/2022] [Indexed: 02/18/2023]
Abstract
For decades, immunologists have studied the role of circulating immune cells in host protection, with a more recent appreciation of immune cells resident within the tissue microenvironment and the intercommunication between nonhematopoietic cells and immune cells. However, the extracellular matrix (ECM), which comprises at least a third of tissue structures, remains relatively underexplored in immunology. Similarly, matrix biologists often overlook regulation of complex structural matrices by the immune system. We are only beginning to understand the scale at which ECM structures determine immune cell localization and function. Additionally, we need to better understand how immune cells dictate ECM complexity. This review aims to highlight the potential for biological discovery at the interface of immunology and matrix biology.
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Affiliation(s)
- Tara E Sutherland
- Wellcome Centre for Cell-Matrix Research, Lydia Becker Institute for Immunology & Infection, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Center, University of Manchester, Manchester M13 9PT, UK
- School of Medicine, Medical Sciences and Dentistry, Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK
| | - Douglas P Dyer
- Wellcome Centre for Cell-Matrix Research, Lydia Becker Institute for Immunology & Infection, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Center, University of Manchester, Manchester M13 9PT, UK
- Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance NHS Group, University of Manchester, Salford M6 8HD, UK
| | - Judith E Allen
- Wellcome Centre for Cell-Matrix Research, Lydia Becker Institute for Immunology & Infection, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Center, University of Manchester, Manchester M13 9PT, UK
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16
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Fan X, Zang T, Dai J, Wu N, Hope C, Bai J, Liu Y. The associations of maternal and children's gut microbiota with the development of atopic dermatitis for children aged 2 years. Front Immunol 2022; 13:1038876. [PMID: 36466879 PMCID: PMC9714546 DOI: 10.3389/fimmu.2022.1038876] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/03/2022] [Indexed: 01/13/2024] Open
Abstract
BACKGROUND It is critical to investigate the underlying pathophysiological mechanisms in the development of atopic dermatitis. The microbiota hypothesis suggested that the development of allergic diseases may be attributed to the gut microbiota of mother-offspring pairs. The purpose of this study was to investigate the relationship among maternal-offspring gut microbiota and the subsequent development of atopic dermatitis in infants and toddlers at 2 years old. METHODS A total of 36 maternal-offspring pairs were enrolled and followed up to 2 years postpartum in central China. Demographic information and stool samples were collected perinatally from pregnant mothers and again postpartum from their respective offspring at the following time intervals: time of birth, 6 months, 1 year and 2 years. Stool samples were sequenced with the 16S Illumina MiSeq platform. Logistic regression analysis was used to explore the differences in gut microbiota between the atopic dermatitis group and control group. RESULTS Our results showed that mothers of infants and toddlers with atopic dermatitis had higher abundance of Candidatus_Stoquefichus and Pseudomonas in pregnancy and that infants and toddlers with atopic dermatitis had higher abundance of Eubacterium_xylanophilum_group at birth, Ruminococcus_gauvreauii_group at 1 year and UCG-002 at 2 years, and lower abundance of Gemella and Veillonella at 2 years. Additionally, the results demonstrated a lower abundance of Prevotella in mothers of infants and toddlers with atopic dermatitis compared to mothers of the control group, although no statistical difference was found in the subsequent analysis. CONCLUSION The results of this study support that gut microbiota status among mother-offspring pairs appears to be associated with the pathophysiological development of pediatric atopic dermatitis.
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Affiliation(s)
- Xiaoxiao Fan
- Wuhan University School of Nursing, Wuhan University, Wuhan, China
| | - Tianzi Zang
- Wuhan University School of Nursing, Wuhan University, Wuhan, China
| | - Jiamiao Dai
- Wuhan University School of Nursing, Wuhan University, Wuhan, China
| | - Ni Wu
- Wuhan University School of Nursing, Wuhan University, Wuhan, China
| | - Chloe Hope
- Emory University Nell Hodgson Woodruff School of Nursing, Atlanta, GA, United States
| | - Jinbing Bai
- Emory University Nell Hodgson Woodruff School of Nursing, Atlanta, GA, United States
| | - Yanqun Liu
- Wuhan University School of Nursing, Wuhan University, Wuhan, China
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17
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Gao CA, Morales-Nebreda L, Pickens CI. Gearing up for battle: Harnessing adaptive T cell immunity against gram-negative pneumonia. Front Cell Infect Microbiol 2022; 12:934671. [PMID: 36061870 PMCID: PMC9433749 DOI: 10.3389/fcimb.2022.934671] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 07/25/2022] [Indexed: 11/28/2022] Open
Abstract
Pneumonia is one of the leading causes of morbidity and mortality worldwide and Gram-negative bacteria are a major cause of severe pneumonia. Despite advances in diagnosis and treatment, the rise of multidrug-resistant organisms and hypervirulent strains demonstrates that there will continue to be challenges with traditional treatment strategies using antibiotics. Hence, an alternative approach is to focus on the disease tolerance components that mediate immune resistance and enhance tissue resilience. Adaptive immunity plays a pivotal role in modulating these processes, thus affecting the incidence and severity of pneumonia. In this review, we focus on the adaptive T cell responses to pneumonia induced by Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii. We highlight key factors in these responses that have potential for therapeutic targeting, as well as the gaps in current knowledge to be focused on in future work.
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Affiliation(s)
- Catherine A Gao
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Luisa Morales-Nebreda
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Chiagozie I Pickens
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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18
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Rahimi RA, Sokol CL. Functional Recognition Theory and Type 2 Immunity: Insights and Uncertainties. Immunohorizons 2022; 6:569-580. [PMID: 35926975 PMCID: PMC9897289 DOI: 10.4049/immunohorizons.2200002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 06/28/2022] [Indexed: 02/06/2023] Open
Abstract
Type 2 immunity plays an important role in host defense against helminths and toxins while driving allergic diseases. Despite progress in understanding the biology of type 2 immunity, the fundamental mechanisms regulating the type 2 immune module remain unclear. In contrast with structural recognition used by pattern recognition receptors, type 2 immunogens are sensed through their functional properties. Functional recognition theory has arisen as the paradigm for the initiation of type 2 immunity. However, the vast array of structurally unrelated type 2 immunogens makes it challenging to advance our understanding of type 2 immunity. In this article, we review functional recognition theory and organize type 2 immunogens into distinct classes based on how they fit into the concept of functional recognition. Lastly, we discuss areas of uncertainty in functional recognition theory with the goal of providing a framework to further define the logic of type 2 immunity in host protection and immunopathology.
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Affiliation(s)
- Rod A Rahimi
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA;
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, MA; and
| | - Caroline L Sokol
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, MA; and
- Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA
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19
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McCarville JL, Ayres JS. Virulence triggered allergies: Pseudomonas gets the Las laugh. Immunity 2022; 55:824-826. [PMID: 35545032 DOI: 10.1016/j.immuni.2022.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The mechanisms of how infectious diseases contribute to allergy remain unanswered. In this issue of Immunity, Agaronyan et al. (2022) show that Pseudomonas aeruginosa drives immune deviation through induction of type 2 immune responses, resulting in niche remodeling that incites allergic responses to innocuous antigens.
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Affiliation(s)
- Justin L McCarville
- Molecular and Systems Physiology Lab, Gene Expression Lab, Nomis Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biology Studies, 10010 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Janelle S Ayres
- Molecular and Systems Physiology Lab, Gene Expression Lab, Nomis Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biology Studies, 10010 N. Torrey Pines Road, La Jolla, CA 92037, USA.
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20
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Stölting H, Lloyd CM. Pseudomonas aeruginosa: a pathogen making itself at home. Trends Immunol 2022; 43:497-499. [DOI: 10.1016/j.it.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 05/20/2022] [Indexed: 11/25/2022]
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