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Wei YF, Xie SA, Zhang ST. Current research on the interaction between Helicobacter pylori and macrophages. Mol Biol Rep 2024; 51:497. [PMID: 38598010 DOI: 10.1007/s11033-024-09395-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 02/28/2024] [Indexed: 04/11/2024]
Abstract
Helicobacter pylori (H. pylori) is a gram-negative bacteria with a worldwide infection rate of 50%, known to induce gastritis, ulcers and gastric cancer. The interplay between H. pylori and immune cells within the gastric mucosa is pivotal in the pathogenesis of H. pylori-related disease. Following H. pylori infection, there is an observed increase in gastric mucosal macrophages, which are associated with the progression of gastritis. H. pylori elicits macrophage polarization, releases cytokines, reactive oxygen species (ROS) and nitric oxide (NO) to promote inflammatory response and eliminate H. pylori. Meanwhile, H. pylori has developed mechanisms to evade the host immune response in order to maintain the persistent infection, including interference with macrophage phagocytosis and antigen presentation, as well as induction of macrophage apoptosis. Consequently, the interaction between H. pylori and macrophages can significantly impact the progression, pathogenesis, and resolution of H. pylori infection. Moreover, macrophages are emerging as potential therapeutic targets for H. pylori-associated gastritis. Therefore, elucidating the involvement of macrophages in H. pylori infection may provide novel insights into the pathogenesis, progression, and management of H. pylori-related disease.
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Affiliation(s)
- Yan-Fei Wei
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China
| | - Si-An Xie
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
- Beijing Digestive Disease Center, State Key Laboratory of Digestive Health, National Clinical Research Center for Digestive Disease, Beijing, 100050, China.
| | - Shu-Tian Zhang
- Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, 100050, China.
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Zhao J, Feng Y, Liu X, Li H, Guo H, Ke J, Long X. The relationship of ALPK1, hyaluronic acid and M1 macrophage polarization in the temporomandibular joint synovitis. J Cell Mol Med 2024; 28:e18172. [PMID: 38494837 PMCID: PMC10945073 DOI: 10.1111/jcmm.18172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/09/2024] [Accepted: 01/31/2024] [Indexed: 03/19/2024] Open
Abstract
M1 macrophage polarization and synovitis play an important role in the pathogenesis of temporomandibular joint osteoarthritis (TMJOA). Reduced molecular weight of hyaluronic acid (HA) in synovial fluid of patients with TMJOA. In addition, high molecular weight hyaluronic acid (HMW-HA) is often used clinically to treat TMJ inflammation. As a pattern recognition receptor of the cytoplasm, ALPK1 was found to be pro-inflammatory in a variety of diseases. However, the relationship of ALPK1, HA and M1 macrophage polarization in TMJ synovitis remains unclear. We aimed to investigate the role of ALPK1 and HA in macrophage polarization and TMJ synovitis and the underlying mechanisms. The results demonstrated that ALPK1 was highly upregulated in the synovial macrophages in the inflamed TMJ synovium of patients. Low molecular weight hyaluronic acid (LMW-HA) promoted the expression of ALPK1 and M1 macrophage-associated genes. Besides, rhALPK1 promoted the expression of M1 macrophage-associated factors and the nuclear translocation of PKM2. Furthermore, ALPK1 knockout mice exhibited limited infiltration of macrophages and decreased expression levels of M1 macrophage-associated genes in CFA-induced TMJ synovitis. While HMW-HA inhibited the expression of ALPK1 and M1 macrophage polarization. Our results elucidated that ALPK1 promoted TMJ synovitis by promoting nuclear PKM2-mediated M1 macrophage polarization, whereas HMW-HA inhibited the expression of ALPK1 as well as M1 macrophage polarization.
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Affiliation(s)
- Jie Zhao
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
| | - Yaping Feng
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
| | - Xin Liu
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
| | - Huimin Li
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
| | - Huilin Guo
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
| | - Jin Ke
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
- Department of Oral and Maxillofacial Surgery, School and Hospital of StomatologyWuhan UniversityWuhanChina
| | - Xing Long
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School and Hospital of StomatologyWuhan UniversityWuhanChina
- Department of Oral and Maxillofacial Surgery, School and Hospital of StomatologyWuhan UniversityWuhanChina
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Barrett KA, Kassama FJ, Surks W, Mulholland AJ, Moulton KD, Dube DH. Helicobacter pylori glycan biosynthesis modulates host immune cell recognition and response. Front Cell Infect Microbiol 2024; 14:1377077. [PMID: 38572314 PMCID: PMC10987845 DOI: 10.3389/fcimb.2024.1377077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 03/11/2024] [Indexed: 04/05/2024] Open
Abstract
Introduction The pathogenic bacterium Helicobacter pylori has evolved glycan-mediated mechanisms to evade host immune defenses. This study tests the hypothesis that genetic disruption of H. pylori glycan biosynthesis alters immune recognition and response by human gastric epithelial cells and monocyte-derived dendritic cells. Methods To test this hypothesis, human cell lines were challenged with wildtype H. pylori alongside an array of H. pylori glycosylation mutants. The relative levels of immune response were measured via immature dendritic cell maturation and cytokine secretion. Results Our findings indicate that disruption of lipopolysaccharide biosynthesis diminishes gastric cytokine production, without disrupting dendritic cell recognition and activation. In contrast, variable immune responses were observed in protein glycosylation mutants which prompted us to test the hypothesis that phase variation plays a role in regulating bacterial cell surface glycosylation and subsequent immune recognition. Lewis antigen presentation does not correlate with extent of immune response, while the extent of lipopolysaccharide O-antigen elaboration does. Discussion The outcomes of this study demonstrate that H. pylori glycans modulate the host immune response. This work provides a foundation to pursue immune-based tailoring of bacterial glycans towards modulating immunogenicity of microbial pathogens.
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Affiliation(s)
| | | | | | | | | | - Danielle H. Dube
- Department of Chemistry & Biochemistry, Bowdoin College, Brunswick, ME, United States
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Sun Y, Cronin MF, Mendonça MCP, Guo J, O’Driscoll CM. M2pep-Modified Cyclodextrin-siRNA Nanoparticles Modulate the Immunosuppressive Tumor Microenvironment for Prostate Cancer Therapy. Mol Pharm 2023; 20:5921-5936. [PMID: 37874541 PMCID: PMC10630955 DOI: 10.1021/acs.molpharmaceut.3c00769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/25/2023]
Abstract
Prostate cancer (PCa) is the most prevalent cause of cancer deaths in men. Conventional strategies, such as surgery, radiation, or chemotherapy, face challenges including poor prognosis and resistance. Therefore, the development of new improved strategies is vital to enhance patient outcomes. Recently, immunotherapy has shown potential in the treatment of a range of cancers, including PCa. Tumor-associated macrophages (TAMs) play an important role in the tumor microenvironment (TME) and reprogramming of TAMs is associated with remodeling the TME. The colony-stimulating factor-1/colony stimulating factor-1 receptor (CSF-1/CSF-1R) signaling pathway is closely related to the polarization of TAMs. The downregulation of CSF-1R, using small interfering RNA (siRNA), has been shown to achieve the reprogramming of TAMs, from the immunosuppressive M2 phenotype to the immunostimulatory M1 one. To maximize specific cellular delivery an M2 macrophage-targeting peptide, M2pep, was formulated with an amphiphilic cationic β-Cyclodextrin (CD) incorporating CSF-1R siRNA. The resulting nanoparticles (NPs) increased M2 macrophage targeting both in vitro and in vivo, promoting the release of M1 factors and simultaneously downregulating the levels of M2 factors through TAM reprogramming. The subsequent remodeling of the TME resulted in a reduction in tumor growth in a subcutaneous PCa mouse model mainly mediated through the recruitment of cytotoxic T cells. In summary, this M2pep-targeted CD-based delivery system demonstrated significant antitumor efficacy, thus presenting an alternative immunotherapeutic strategy for PCa treatment.
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Affiliation(s)
- Yao Sun
- School
of Pharmacy, University College Cork, Cork T12 K8AF, Ireland
| | | | | | - Jianfeng Guo
- School
of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
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Zhao CN, Xiao LL, Zhang Y. Effects of Helicobacter pylori Infection on the Prognosis of Chronic Atrophic Gastritis by Inducing the Macrophage Polarization. Gastroenterology Res 2023; 16:226-233. [PMID: 37691749 PMCID: PMC10482605 DOI: 10.14740/gr1636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 06/22/2023] [Indexed: 09/12/2023] Open
Abstract
Background Recently, the effects of Helicobacter pylori (H. pylori) infection on the prognosis of chronic atrophic gastritis (CAG) are still unclear. The aim of our study was to discuss the role of H. pylori infection on the prognosis of CAG by inducing the M1/M2 macrophage polarization. Methods A total of 180 subjects as control (group 1), CAG patients without H. pylori infection (group 2) and H. pylori-associated CAG patients (group 3) were respectively recruited for this cross-sectional investigation in Daqing Oilfield General Hospital from May 2019 to July 2020. Their serum samples were collected to determine the concentrations of pro-inflammatory and anti-inflammatory cytokines. Meanwhile, the gastric mucosa was excised to determine the related gene expressions on the M1/M2 macrophage polarization. Then the prognosis of CAG was evaluated according to the status of clinical manifestations and endoscopic examination after the follow-up. Results Notably, it was proved that compared with the control group, the expressions and concentrations of pro-inflammatory cytokines (M1 macrophage: inducible nitric oxide synthase (iNOS), tumor necrosis factor-alpha (TNF-α), interferon-gamma (IFN-γ), and interleukin-6 (IL-6)) were significantly higher, while the anti-inflammatory cytokines (M2 macrophage: arginase-1 (Arg-1), IL-4 and IL-10) were apparently reduced in the group 2 and group 3 (P < 0.05). Moreover, more days were needed for the prognosis of CAG in group 3 than those in group 2, which was accompanied by higher expressions of pro-inflammatory and lower anti-inflammatory cytokines at the baseline (P < 0.05). Furthermore, negative correlations were shown between the concentrations of iNOS, TNF-α, IFN-γ and IL-6, and the prognosis of CAG (P < 0.05), while positive correlations were observed between the contents of IL-4 and IL-10, and prognosis of CAG (P < 0.05). Conclusion These above results indicated that H. pylori infection-induced disorders of M1/M2 macrophage polarization could affect the prognosis of CAG.
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Affiliation(s)
- Chun Na Zhao
- Department of Gastroenterology, Daqing Oilfield General Hospital, Daqing City, Heilongjiang Province, 163000, China
- These authors contributed equally to this manuscript
| | - Li Li Xiao
- Department of Gastroenterology, Daqing Oilfield General Hospital, Daqing City, Heilongjiang Province, 163000, China
- These authors contributed equally to this manuscript
| | - Ying Zhang
- Department of Gastroenterology, Daqing Oilfield General Hospital, Daqing City, Heilongjiang Province, 163000, China
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Faass L, Hauke M, Stein SC, Josenhans C. Innate activation of human neutrophils and neutrophil-like cells by the pro-inflammatory bacterial metabolite ADP-heptose and Helicobacter pylori. Int J Med Microbiol 2023; 313:151585. [PMID: 37399704 DOI: 10.1016/j.ijmm.2023.151585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/16/2023] [Accepted: 06/26/2023] [Indexed: 07/05/2023] Open
Abstract
Lipopolysaccharide inner core heptose metabolites, including ADP-heptose, play a substantial role in the activation of cell-autonomous innate immune responses in eukaryotic cells, via the ALPK1-TIFA signaling pathway, as demonstrated for various pathogenic bacteria. The important role of LPS heptose metabolites during Helicobacter pylori infection of the human gastric niche has been demonstrated for gastric epithelial cells and macrophages, while the role of heptose metabolites on human neutrophils has not been investigated. In this study, we aimed to gain a better understanding of the activation potential of bacterial heptose metabolites for human neutrophil cells. To do so, we used pure ADP-heptose and, as a bacterial model, H. pylori, which can transport heptose metabolites into the human host cell via the Cag Type 4 Secretion System (CagT4SS). Main questions were how bacterial heptose metabolites impact on the pro-inflammatory activation, alone and in the bacterial context, and how they influence maturation of human neutrophils. Results of the present study demonstrated that neutrophils respond with high sensitivity to pure heptose metabolites, and that global regulation networks and neutrophil maturation are influenced by heptose exposure. Furthermore, activation of human neutrophils by live H. pylori is strongly impacted by the presence of LPS heptose metabolites and the functionality of its CagT4SS. Similar activities were determined in cell culture neutrophils of different maturation states and in human primary neutrophils. In conclusion, we demonstrated that specific heptose metabolites or bacteria producing heptoses exhibit a strong activity on cell-autonomous innate responses of human neutrophils.
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Affiliation(s)
- Larissa Faass
- Max von Pettenkofer Institute for Medical Microbiology and Hospital Epidemiology, Ludwig Maximilians-University München, Pettenkoferstrasse 9a, 80336 München, Germany
| | - Martina Hauke
- Max von Pettenkofer Institute for Medical Microbiology and Hospital Epidemiology, Ludwig Maximilians-University München, Pettenkoferstrasse 9a, 80336 München, Germany
| | - Saskia C Stein
- Institute for Medical Microbiology and Hospital Epidemiology, Hannover Medical School, Hannover, Germany
| | - Christine Josenhans
- Max von Pettenkofer Institute for Medical Microbiology and Hospital Epidemiology, Ludwig Maximilians-University München, Pettenkoferstrasse 9a, 80336 München, Germany; DZIF Partner Site Munich, Germany.
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Hauke M, Metz F, Rapp J, Faass L, Bats SH, Radziej S, Link H, Eisenreich W, Josenhans C. Helicobacter pylori Modulates Heptose Metabolite Biosynthesis and Heptose-Dependent Innate Immune Host Cell Activation by Multiple Mechanisms. Microbiol Spectr 2023; 11:e0313222. [PMID: 37129481 PMCID: PMC10269868 DOI: 10.1128/spectrum.03132-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 04/05/2023] [Indexed: 05/03/2023] Open
Abstract
Heptose metabolites including ADP-d-glycero-β-d-manno-heptose (ADP-heptose) are involved in bacterial lipopolysaccharide and cell envelope biosynthesis. Recently, heptoses were also identified to have potent proinflammatory activity on human cells as novel microbe-associated molecular patterns. The gastric pathogenic bacterium Helicobacter pylori produces heptose metabolites, which it transports into human cells through its Cag type 4 secretion system. Using H. pylori as a model, we have addressed the question of how proinflammatory ADP-heptose biosynthesis can be regulated by bacteria. We have characterized the interstrain variability and regulation of heptose biosynthesis genes and the modulation of heptose metabolite production by H. pylori, which impact cell-autonomous proinflammatory human cell activation. HldE, a central enzyme of heptose metabolite biosynthesis, showed strong sequence variability between strains and was also variably expressed between strains. Amounts of gene transcripts in the hldE gene cluster displayed intrastrain and interstrain differences, were modulated by host cell contact and the presence of the cag pathogenicity island, and were affected by carbon starvation regulator A (CsrA). We reconstituted four steps of the H. pylori lipopolysaccharide (LPS) heptose biosynthetic pathway in vitro using recombinant purified GmhA, HldE, and GmhB proteins. On the basis of one- and two-dimensional nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry, the structures of major reaction products were identified as β-d-ADP-heptose and β-heptose-1-monophosphate. A proinflammatory heptose-monophosphate variant was also identified for the first time as a novel cell-active product in H. pylori bacteria. Separate purified HldE subdomains and variant HldE allowed us to uncover additional strain variation in generating heptose metabolites. IMPORTANCE Bacterial heptose metabolites, intermediates of lipopolysaccharide (LPS) biosynthesis, are novel microbe-associated molecular patterns (MAMPs) that activate proinflammatory signaling. In the gastric pathogen Helicobacter pylori, heptoses are transferred into host cells by the Cag type IV secretion system, which is also involved in carcinogenesis. Little is known about how H. pylori, which is highly strain variable, regulates heptose biosynthesis and downstream host cell activation. We report here that the regulation of proinflammatory heptose production by H. pylori is strain specific. Heptose gene cluster activity is modulated by the presence of an active cag pathogenicity island (cagPAI), contact with human cells, and the carbon starvation regulator A. Reconstitution with purified biosynthesis enzymes and purified bacterial lysates allowed us to biochemically characterize heptose pathway products, identifying a heptose-monophosphate variant as a novel proinflammatory metabolite. These findings emphasize that the bacteria use heptose biosynthesis to fine-tune inflammation and also highlight opportunities to mine the heptose biosynthesis pathway as a potential therapeutic target against infection, inflammation, and cancer.
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Affiliation(s)
- Martina Hauke
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Felix Metz
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Johanna Rapp
- Bacterial Metabolomics, CMFI, University Tübingen, Tübingen, Germany
| | - Larissa Faass
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Simon H. Bats
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
| | - Sandra Radziej
- Bavarian NMR Center–Structural Membrane Biochemistry, Department of Chemistry, Technical University Munich, Garching, Germany
| | - Hannes Link
- Bacterial Metabolomics, CMFI, University Tübingen, Tübingen, Germany
| | - Wolfgang Eisenreich
- Bavarian NMR Center–Structural Membrane Biochemistry, Department of Chemistry, Technical University Munich, Garching, Germany
| | - Christine Josenhans
- Max von Pettenkofer Institute, Ludwig Maximilians University Munich, München, Germany
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Sidor K, Skirecki T. A Bittersweet Kiss of Gram-Negative Bacteria: The Role of ADP-Heptose in the Pathogenesis of Infection. Microorganisms 2023; 11:1316. [PMID: 37317291 DOI: 10.3390/microorganisms11051316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 06/16/2023] Open
Abstract
Due to the global crisis caused by the dramatic rise of drug resistance among Gram-negative bacteria, there is an urgent need for a thorough understanding of the pathogenesis of infections of such an etiology. In light of the limited availability of new antibiotics, therapies aimed at host-pathogen interactions emerge as potential treatment modalities. Thus, understanding the mechanism of pathogen recognition by the host and immune evasion appear to be the key scientific issues. Until recently, lipopolysaccharide (LPS) was recognized as a major pathogen-associated molecular pattern (PAMP) of Gram-negative bacteria. However, recently, ADP-L-glycero-β-D-manno-heptose (ADP-heptose), an intermediate carbohydrate metabolite of the LPS biosynthesis pathway, was discovered to activate the hosts' innate immunity. Therefore, ADP-heptose is regarded as a novel PAMP of Gram-negative bacteria that is recognized by the cytosolic alpha kinase-1 (ALPK1) protein. The conservative nature of this molecule makes it an intriguing player in host-pathogen interactions, especially in the context of changes in LPS structure or even in its loss by certain resistant pathogens. Here, we present the ADP-heptose metabolism, outline the mechanisms of its recognition and the activation of its immunity, and summarize the role of ADP-heptose in the pathogenesis of infection. Finally, we hypothesize about the routes of the entry of this sugar into cytosol and point to emerging questions that require further research.
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Affiliation(s)
- Karolina Sidor
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
| | - Tomasz Skirecki
- Department of Translational Immunology and Experimental Intensive Care, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
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Abstract
Helicobacter pylori infection causes chronic gastritis, which can progress to severe gastroduodenal pathologies, including peptic ulcer, gastric cancer and gastric mucosa-associated lymphoid tissue lymphoma. H. pylori is usually transmitted in childhood and persists for life if untreated. The infection affects around half of the population in the world but prevalence varies according to location and sanitation standards. H. pylori has unique properties to colonize gastric epithelium in an acidic environment. The pathophysiology of H. pylori infection is dependent on complex bacterial virulence mechanisms and their interaction with the host immune system and environmental factors, resulting in distinct gastritis phenotypes that determine possible progression to different gastroduodenal pathologies. The causative role of H. pylori infection in gastric cancer development presents the opportunity for preventive screen-and-treat strategies. Invasive, endoscopy-based and non-invasive methods, including breath, stool and serological tests, are used in the diagnosis of H. pylori infection. Their use depends on the specific individual patient history and local availability. H. pylori treatment consists of a strong acid suppressant in various combinations with antibiotics and/or bismuth. The dramatic increase in resistance to key antibiotics used in H. pylori eradication demands antibiotic susceptibility testing, surveillance of resistance and antibiotic stewardship.
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Affiliation(s)
- Peter Malfertheiner
- Medical Department II, University Hospital, Ludwig-Maximilians-Universität, Munich, Germany.
- Medical Department Klinik of Gastroenterology, Hepatology and Infectiology, Otto-von-Guericke Universität, Magdeburg, Germany.
| | - M Constanza Camargo
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD, USA
| | - Emad El-Omar
- Microbiome Research Centre, St George & Sutherland Clinical Campuses, School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Sydney, New South Wales, Australia
| | - Jyh-Ming Liou
- Department of Internal Medicine, National Taiwan University Cancer Center, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Richard Peek
- Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Christian Schulz
- Medical Department II, University Hospital, Ludwig-Maximilians-Universität, Munich, Germany
- DZIF Deutsches Zentrum für Infektionsforschung, Partner Site Munich, Munich, Germany
| | - Stella I Smith
- Department of Molecular Biology and Biotechnology, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | - Sebastian Suerbaum
- DZIF Deutsches Zentrum für Infektionsforschung, Partner Site Munich, Munich, Germany
- Max von Pettenkofer Institute, Faculty of Medicine, Ludwig-Maximilians-Universität, Munich, Germany
- National Reference Center for Helicobacter pylori, Munich, Germany
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Sun Y, Cronin MF, Mendonça MCP, Guo J, O'Driscoll CM. Sialic Acid-Targeted Cyclodextrin-Based Nanoparticles Deliver CSF-1R siRNA and Reprogram Tumour-Associated Macrophages for Immunotherapy of Prostate Cancer. Eur J Pharm Sci 2023; 185:106427. [PMID: 36948408 DOI: 10.1016/j.ejps.2023.106427] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/03/2023] [Accepted: 03/19/2023] [Indexed: 03/24/2023]
Abstract
Prostate cancer remains a serious condition threatening the health of men. Due to the complicated nature of the tumour microenvironment (TME), conventional treatments face challenges including poor prognosis and tumour resistance, therefore new therapeutic strategies are urgently needed. Small interfering RNA (siRNA), a double-stranded non-coding RNA, regulates specific gene expression through RNA interference. Tumour-associated macrophages (TAMs) are a potential therapeutic target in cancer immunotherapy. Colony stimulating factor-1/colony stimulating factor-1 receptor (CSF-1/CSF-1R) signaling pathway plays a crucial role in the polarization of the immunosuppressive TAMs, M2 macrophages. Downregulation of CSF-1R is known to reprogram the immunosuppressive TAMs, M2 macrophages, to the immunostimulatory phenotype, M1 macrophages. Sialic acid is a ligand for Siglec-1 (CD169) which is overexpressed on M2 macrophages with little expression in other phenotypes. Therefore, a sialic acid-targeted cyclodextrin-based nanoparticle was developed to specifically deliver CSF-1R siRNA to M2 macrophages. The nanoparticles were studied in vitro using both human and mouse prostate cancer cell lines. Results show that the targeted nanoparticles achieved cell specific delivery to M2 macrophages via the sialic acid-CD169 axis. The expression of CSF-1R was significantly downregulated in M2 macrophages (29.64% for targeted vs 19.31% for non-targeted nanoparticles in THP-1-derived M2 macrophages and 38.94% for targeted vs 18.51% for non-targeted nanoparticles in RAW 264.7-derived M2 macrophages, n = 4, p < 0.01). The resulting reprograming of M2 macrophages to M1 enhanced the level of apoptosis in the prostate cancer cells in a Transwell model (49.17% for targeted vs 37.68% for non-targeted nanoparticles in PC-3 cells and 69.15% for targeted vs 44.73% for non-targeted nanoparticles in TRAMP C1 cells, n = 3, p < 0.01). Thus, this targeted cyclodextrin-based siRNA drug delivery system provides a potential strategy for prostate cancer immunotherapy.
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Affiliation(s)
- Yao Sun
- School of Pharmacy, University College Cork, Ireland
| | | | | | - Jianfeng Guo
- School of Pharmaceutical Sciences, Jilin University, China.
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Faass L, Hauke M, Stein SC, Josenhans C. Innate immune activation and modulatory factors of Helicobacter pylori towards phagocytic and nonphagocytic cells. Curr Opin Immunol 2023; 82:102301. [PMID: 36933362 DOI: 10.1016/j.coi.2023.102301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/17/2023] [Indexed: 03/18/2023]
Abstract
Helicobacter pylori is an intriguing obligate host-associated human pathogen with a specific host interaction biology, which has been shaped by thousands of years of host-pathogen coevolution. Molecular mechanisms of interaction of H. pylori with the local immune cells in the human system are less well defined than epithelial cell interactions, although various myeloid cells, including neutrophils and other phagocytes, are locally present or attracted to the sites of infection and interact with H. pylori. We have recently addressed the question of novel bacterial innate immune stimuli, including bacterial cell envelope metabolites, that can activate and modulate cell responses via the H. pylori Cag type IV secretion system. This review article gives an overview of what is currently known about the interaction modes and mechanisms of H. pylori with diverse human cell types, with a focus on bacterial metabolites and cells of the myeloid lineage including phagocytic and antigen-presenting cells.
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Fuchs S, Gong R, Gerhard M, Mejías-Luque R. Immune Biology and Persistence of Helicobacter pylori in Gastric Diseases. Curr Top Microbiol Immunol 2023; 444:83-115. [PMID: 38231216 DOI: 10.1007/978-3-031-47331-9_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Helicobacter pylori is a prevalent pathogen, which affects more than 40% of the global population. It colonizes the human stomach and persists in its host for several decades or even a lifetime, if left untreated. The persistent infection has been linked to various gastric diseases, including gastritis, peptic ulcers, and an increased risk for gastric cancer. H. pylori infection triggers a strong immune response directed against the bacterium associated with the infiltration of innate phagocytotic immune cells and the induction of a Th1/Th17 response. Even though certain immune cells seem to be capable of controlling the infection, the host is unable to eliminate the bacteria as H. pylori has developed remarkable immune evasion strategies. The bacterium avoids its killing through innate recognition mechanisms and manipulates gastric epithelial cells and immune cells to support its persistence. This chapter focuses on the innate and adaptive immune response induced by H. pylori infection, and immune evasion strategies employed by the bacterium to enable persistent infection.
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Affiliation(s)
- Sonja Fuchs
- Institute for Medical Microbiology, Immunology and Hygiene, TUM School of Medicine and Health, Department Preclinical Medicine, Technical University of Munich (TUM), Trogerstraße 30, 81675, Munich, Germany
| | - Ruolan Gong
- Institute for Medical Microbiology, Immunology and Hygiene, TUM School of Medicine and Health, Department Preclinical Medicine, Technical University of Munich (TUM), Trogerstraße 30, 81675, Munich, Germany
| | - Markus Gerhard
- Institute for Medical Microbiology, Immunology and Hygiene, TUM School of Medicine and Health, Department Preclinical Medicine, Technical University of Munich (TUM), Trogerstraße 30, 81675, Munich, Germany
| | - Raquel Mejías-Luque
- Institute for Medical Microbiology, Immunology and Hygiene, TUM School of Medicine and Health, Department Preclinical Medicine, Technical University of Munich (TUM), Trogerstraße 30, 81675, Munich, Germany.
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Backert S, Linz B, Tegtmeyer N. Helicobacter pylori-Induced Host Cell DNA Damage and Genetics of Gastric Cancer Development. Curr Top Microbiol Immunol 2023; 444:185-206. [PMID: 38231219 DOI: 10.1007/978-3-031-47331-9_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Gastric cancer is a very serious and deadly disease worldwide with about one million new cases every year. Most gastric cancer subtypes are associated with genetic and epigenetic aberrations caused by chromosome instability, microsatellite instability or Epstein-Barr virus infection. Another risk factor is an infection with Helicobacter pylori, which also triggers severe alterations in the host genome. This pathogen expresses an extraordinary repertoire of virulence determinants that take over control of important host cell signaling functions. In fact, H. pylori is a paradigm of persistent infection, chronic inflammation and cellular destruction. In particular, H. pylori profoundly induces chromosomal DNA damage by introducing double-strand breaks (DSBs) followed by genomic instability. DSBs appear in response to oxidative stress and pro-inflammatory transcription during the S-phase of the epithelial cell cycle, which mainly depends on the presence of the bacterial cag pathogenicity island (cagPAI)-encoded type IV secretion system (T4SS). This scenario is closely connected with the T4SS-mediated injection of ADP-glycero-β-D-manno-heptose (ADP-heptose) and oncoprotein CagA. While ADP-heptose links transcription factor NF-κB-induced innate immune signaling with RNA-loop-mediated DNA replication stress and introduction of DSBs, intracellular CagA targets the tumor suppressor BRCA1. The latter scenario promotes BRCAness, a disease characterized by the deficiency of effective DSB repair. In addition, genetic studies of patients demonstrated the presence of gastric cancer-associated single nucleotide polymorphisms (SNPs) in immune-regulatory and other genes as well as specific pathogenic germline variants in several crucial genes involved in homologous recombination and DNA repair, all of which are connected to H. pylori infection. Here we review the molecular mechanisms leading to chromosomal DNA damage and specific genetic aberrations in the presence or absence of H. pylori infection, and discuss their importance in gastric carcinogenesis.
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Affiliation(s)
- Steffen Backert
- Division of Microbiology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 5, 91058, Erlangen, Germany.
| | - Bodo Linz
- Division of Microbiology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 5, 91058, Erlangen, Germany
| | - Nicole Tegtmeyer
- Division of Microbiology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 5, 91058, Erlangen, Germany.
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14
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Kozycki CT, Kodati S, Huryn L, Wang H, Warner BM, Jani P, Hammoud D, Abu-Asab MS, Jittayasothorn Y, Mattapallil MJ, Tsai WL, Ullah E, Zhou P, Tian X, Soldatos A, Moutsopoulos N, Kao-Hsieh M, Heller T, Cowen EW, Lee CCR, Toro C, Kalsi S, Khavandgar Z, Baer A, Beach M, Long Priel D, Nehrebecky M, Rosenzweig S, Romeo T, Deuitch N, Brenchley L, Pelayo E, Zein W, Sen N, Yang AH, Farley G, Sweetser DA, Briere L, Yang J, de Oliveira Poswar F, Schwartz I, Silva Alves T, Dusser P, Koné-Paut I, Touitou I, Titah SM, van Hagen PM, van Wijck RTA, van der Spek PJ, Yano H, Benneche A, Apalset EM, Jansson RW, Caspi RR, Kuhns DB, Gadina M, Takada H, Ida H, Nishikomori R, Verrecchia E, Sangiorgi E, Manna R, Brooks BP, Sobrin L, Hufnagel R, Beck D, Shao F, Ombrello AK, Aksentijevich I, Kastner DL. Gain-of-function mutations in ALPK1 cause an NF-κB-mediated autoinflammatory disease: functional assessment, clinical phenotyping and disease course of patients with ROSAH syndrome. Ann Rheum Dis 2022; 81:1453-1464. [PMID: 35868845 PMCID: PMC9484401 DOI: 10.1136/annrheumdis-2022-222629] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/06/2022] [Indexed: 11/06/2022]
Abstract
Objectives To test the hypothesis that ROSAH (retinal dystrophy, optic nerve oedema, splenomegaly, anhidrosis and headache) syndrome, caused by dominant mutation in ALPK1, is an autoinflammatory disease. Methods This cohort study systematically evaluated 27 patients with ROSAH syndrome for inflammatory features and investigated the effect of ALPK1 mutations on immune signalling. Clinical, immunologic and radiographical examinations were performed, and 10 patients were empirically initiated on anticytokine therapy and monitored. Exome sequencing was used to identify a new pathogenic variant. Cytokine profiling, transcriptomics, immunoblotting and knock-in mice were used to assess the impact of ALPK1 mutations on protein function and immune signalling. Results The majority of the cohort carried the p.Thr237Met mutation but we also identified a new ROSAH-associated mutation, p.Tyr254Cys. Nearly all patients exhibited at least one feature consistent with inflammation including recurrent fever, headaches with meningeal enhancement and premature basal ganglia/brainstem mineralisation on MRI, deforming arthritis and AA amyloidosis. However, there was significant phenotypic variation, even within families and some adults lacked functional visual deficits. While anti-TNF and anti-IL-1 therapies suppressed systemic inflammation and improved quality of life, anti-IL-6 (tocilizumab) was the only anticytokine therapy that improved intraocular inflammation (two of two patients). Patients’ primary samples and in vitro assays with mutated ALPK1 constructs showed immune activation with increased NF-κB signalling, STAT1 phosphorylation and interferon gene expression signature. Knock-in mice with the Alpk1 T237M mutation exhibited subclinical inflammation. Clinical features not conventionally attributed to inflammation were also common in the cohort and included short dental roots, enamel defects and decreased salivary flow. Conclusion ROSAH syndrome is an autoinflammatory disease caused by gain-of-function mutations in ALPK1 and some features of disease are amenable to immunomodulatory therapy.
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Affiliation(s)
- Christina Torres Kozycki
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA .,National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, USA
| | | | | | - Hongying Wang
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Blake M Warner
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Priyam Jani
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Dima Hammoud
- Radiology and Imaging Sciences, National Institutes of Health Clinical Center, Bethesda, Maryland, USA
| | - Mones S Abu-Asab
- Section of Histopathology, National Eye Institute, Bethesda, Maryland, USA
| | | | | | - Wanxia Li Tsai
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland, USA
| | - Ehsan Ullah
- Ophthalmic Genetics & Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Ping Zhou
- National Institute of Biological Sciences Beijing, Beijing, China
| | - Xiaoying Tian
- National Institute of Biological Sciences Beijing, Beijing, China
| | - Ariane Soldatos
- National Institute of Neurological Disorders and Stroke, Bethesda, Maryland, USA
| | - Niki Moutsopoulos
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Marie Kao-Hsieh
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Theo Heller
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Edward W Cowen
- Dermatology Branch, NIH, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland, USA
| | | | - Camilo Toro
- Undiagnosed Diseases Program, Bethesda, Maryland, USA.,National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Shelley Kalsi
- National Heart Lung and Blood Institute, Bethesda, Maryland, USA
| | - Zohreh Khavandgar
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Alan Baer
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Margaret Beach
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Debra Long Priel
- Neutrophil Monitoring Laboratory, Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Michele Nehrebecky
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Sofia Rosenzweig
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Tina Romeo
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Natalie Deuitch
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA.,Oncogenesis and Development Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Laurie Brenchley
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Eileen Pelayo
- National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA
| | - Wadih Zein
- National Eye Institute, Bethesda, Maryland, USA
| | - Nida Sen
- National Eye Institute, Bethesda, Maryland, USA
| | - Alexander H Yang
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland, USA
| | - Gary Farley
- Drs. Gilbert and Farley, OD, PC, Colonial Heights, Virginia, USA
| | - David A Sweetser
- Massachusetts General Hospital Center for Genomic Medicine, Boston, Massachusetts, USA.,Division of Medical Genetics & Metabolism, Department of Pediatrics, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Lauren Briere
- Massachusetts General Hospital Center for Genomic Medicine, Boston, Massachusetts, USA
| | - Janine Yang
- Massachusetts Eye and Ear, Boston, Massachusetts, USA
| | - Fabiano de Oliveira Poswar
- Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Ida Schwartz
- Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.,Post Graduate Program in Genetics and Molecular Biology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Perrine Dusser
- Service de Rhumatologie Pédiatrique, Centre de Référence des Maladies Auto-Inflammatoires de l'enfant, Hôpital Bicêtre, AP HP, Université Paris Sud, Bicetre, France
| | - Isabelle Koné-Paut
- Service de Rhumatologie Pédiatrique, Centre de Référence des Maladies Auto-Inflammatoires et de l'amylose inflammatoire CEREMAIA, Hôpital Bicêtre, AP HP, Université Paris Saclay, Bicetre, France
| | - Isabelle Touitou
- CeRéMAIA, CHU Montpellier, INSERM, University of Montpellier, Montpellier, France
| | | | | | | | | | | | - Andreas Benneche
- Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway
| | - Ellen M Apalset
- Bergen Group of Epidemiology and Biomarkers in Rheumatic Disease, Department of Rheumatology, Haukeland University Hospital, Bergen, Norway
| | | | - Rachel R Caspi
- Laboratory of Immunology, National Eye Institute, NIH, Bethesda, Maryland, USA
| | - Douglas Byron Kuhns
- Neutrophil Monitoring Laboratory, Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Massimo Gadina
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland, USA
| | - Hidetoshi Takada
- Department of Child Health, University of Tsukuba Faculty of Medicine, Tsukuba, Japan
| | - Hiroaki Ida
- Division of Respirology, Neurology, and Rheumatology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Ryuta Nishikomori
- Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, Japan
| | - Elena Verrecchia
- Department of Internal Medicine, Periodic Fevers Research Center, Università Cattolica del Sacro Cuore, Roma, Italy.,Dipartimento di scienze dell'invecchiamento, neurologiche, ortopediche e della testa-collo, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy
| | - Eugenio Sangiorgi
- Istitute of Genomic di Medicine, Universita Cattolica del Sacro Cuore, Roma, Italy
| | - Raffaele Manna
- Department of Internal Medicine, Periodic Fevers Research Center, Università Cattolica del Sacro Cuore, Roma, Italy
| | - Brian P Brooks
- Ophthalmic Genetics & Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | - Lucia Sobrin
- Massachusetts Eye and Ear, Boston, Massachusetts, USA
| | - Robert Hufnagel
- Ophthalmic Genetics & Visual Function Branch, National Eye Institute, Bethesda, Maryland, USA
| | | | - Feng Shao
- National Institute of Biological Sciences Beijing, Beijing, China
| | - Amanda K Ombrello
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Ivona Aksentijevich
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Daniel L Kastner
- Inflammatory Disease Section, National Human Genome Research Institute, Bethesda, Maryland, USA
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15
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Cheok YY, Tan GMY, Lee CYQ, Abdullah S, Looi CY, Wong WF. Innate Immunity Crosstalk with Helicobacter pylori: Pattern Recognition Receptors and Cellular Responses. Int J Mol Sci 2022; 23:ijms23147561. [PMID: 35886908 PMCID: PMC9317022 DOI: 10.3390/ijms23147561] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/02/2022] [Accepted: 07/04/2022] [Indexed: 02/07/2023] Open
Abstract
Helicobacter pylori is one of the most successful gastric pathogens that has co-existed with human for centuries. H. pylori is recognized by the host immune system through human pattern recognition receptors (PRRs), such as toll-like receptors (TLRs), C-type lectin like receptors (CLRs), NOD-like receptors (NLRs), and RIG-I-like receptors (RLRs), which activate downstream signaling pathways. Following bacterial recognition, the first responders of the innate immune system, including neutrophils, macrophages, and dendritic cells, eradicate the bacteria through phagocytic and inflammatory reaction. This review provides current understanding of the interaction between the innate arm of host immunity and H. pylori, by summarizing H. pylori recognition by PRRs, and the subsequent signaling pathway activation in host innate immune cells.
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Affiliation(s)
- Yi Ying Cheok
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; (Y.Y.C.); (G.M.Y.T.); (C.Y.Q.L.)
| | - Grace Min Yi Tan
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; (Y.Y.C.); (G.M.Y.T.); (C.Y.Q.L.)
| | - Chalystha Yie Qin Lee
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; (Y.Y.C.); (G.M.Y.T.); (C.Y.Q.L.)
| | - Suhailah Abdullah
- Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Chung Yeng Looi
- School of Biosciences, Faculty of Health & Medical Sciences, Taylor’s University, Subang Jaya 47500, Malaysia;
| | - Won Fen Wong
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; (Y.Y.C.); (G.M.Y.T.); (C.Y.Q.L.)
- Correspondence:
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16
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Eletto D, Mentucci F, Voli A, Petrella A, Porta A, Tosco A. Helicobacter pylori Pathogen-Associated Molecular Patterns: Friends or Foes? Int J Mol Sci 2022; 23:3531. [PMID: 35408892 DOI: 10.3390/ijms23073531] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 01/08/2023] Open
Abstract
Microbial infections are sensed by the host immune system by recognizing signature molecules called Pathogen-Associated Molecular Patterns—PAMPs. The binding of these biomolecules to innate immune receptors, called Pattern Recognition Receptors (PRRs), alerts the host cell, activating microbicidal and pro-inflammatory responses. The outcome of the inflammatory cascade depends on the subtle balance between the bacterial burn and the host immune response. The role of PRRs is to promote the clearance of the pathogen and to limit the infection by bumping inflammatory response. However, many bacteria, including Helicobacter pylori, evolved to escape PRRs’ recognition through different camouflages in their molecular pattern. This review examines all the different types of H. pylori PAMPs, their roles during the infection, and the mechanisms they evolved to escape the host recognition.
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Coletta S, Battaggia G, Della Bella C, Furlani M, Hauke M, Faass L, D'Elios MM, Josenhans C, de Bernard M. ADP-heptose enables Helicobacter pylori to exploit macrophages as a survival niche by suppressing antigen-presenting HLA-II expression. FEBS Lett 2021; 595:2160-2168. [PMID: 34216493 DOI: 10.1002/1873-3468.14156] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 06/30/2021] [Accepted: 06/30/2021] [Indexed: 12/15/2022]
Abstract
The persistence of Helicobacter pylori in the human gastric mucosa implies that the immune response fails to clear the infection. We found that H. pylori compromises the antigen presentation ability of macrophages, because of the decline of the presenting molecules HLA-II. Here, we reveal that the main bacterial factor responsible for this effect is ADP-heptose, an intermediate metabolite in the biosynthetic pathway of lipopolysaccharide (LPS) that elicits a pro-inflammatory response in gastric epithelial cells. In macrophages, it upregulates the expression of miR146b which, in turn, would downmodulate CIITA, the master regulator for HLA-II genes. Hence, H. pylori, utilizing ADP-heptose, exploits a specific arm of macrophage response to establish its survival niche in the face of the immune defense elicited in the gastric mucosa.
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Affiliation(s)
- Sara Coletta
- Department of Biology, University of Padova, Italy
| | | | - Chiara Della Bella
- Department of Experimental and Clinical Medicine, University of Florence, Italy
| | | | - Martina Hauke
- Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, LMU Munich, Germany
| | - Larissa Faass
- Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, LMU Munich, Germany
| | - Mario M D'Elios
- Department of Experimental and Clinical Medicine, University of Florence, Italy
| | - Christine Josenhans
- Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, LMU Munich, Germany
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