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Olesk J, Donahue D, Ross J, Sheehan C, Bennett Z, Armknecht K, Kudary C, Hopf J, Ploplis VA, Castellino FJ, Lee SW, Nallathamby PD. Antimicrobial peptide-conjugated phage-mimicking nanoparticles exhibit potent bactericidal action against Streptococcus pyogenes in murine wound infection models. NANOSCALE ADVANCES 2024; 6:1145-1162. [PMID: 38356633 PMCID: PMC10863710 DOI: 10.1039/d3na00620d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 01/08/2024] [Indexed: 02/16/2024]
Abstract
Streptococcus pyogenes is a causative agent for strep throat, impetigo, and more invasive diseases. The main reason for the treatment failure of streptococcal infections is increased antibiotic resistance. In recent years, infectious diseases caused by pyogenic streptococci resistant to multiple antibiotics have been rising with a significant impact on public health and the veterinary industry. The development of antibiotic resistance and the resulting emergence of multidrug-resistant bacteria have become primary threats to the public health system, commonly leading to nosocomial infections. Many researchers have turned their focus to developing alternative classes of antibacterial agent based on various nanomaterials. We have developed an antibiotic-free nanoparticle system inspired by naturally occurring bacteriophages to fight antibiotic-resistant bacteria. Our phage-mimicking nanoparticles (PhaNPs) display structural mimicry of protein-turret distribution on the head structure of bacteriophages. By mimicking phages, we can take advantage of their evolutionary constant shape and high antibacterial activity while avoiding the immune reactions of the human body experienced by biologically derived phages. We describe the synthesis of hierarchically arranged core-shell nanoparticles, with a silica core conjugated with silver-coated gold nanospheres to which we have chemisorbed the synthetic antimicrobial peptide Syn-71 on the PhaNPs surface, and increased the rapidity of the antibacterial activity of the nanoparticles (PhaNP@Syn71). The antibacterial effect of the PhaNP@Syn71 was tested in vitro and in vivo in mouse wound infection models. In vitro, results showed a dose-dependent complete inhibition of bacterial growth (>99.99%). Cytocompatibility testing on HaCaT human skin keratinocytes showed minimal cytotoxicity of PhaNP@Syn71, being comparable to the vehicle cytotoxicity levels even at higher concentrations, thus proving that our design is biocompatible with human cells. There was a minimum cutoff dosage above which there was no evolution of resistance after prolonged exposure to sub-MIC dosages of PhaNP@Syn71. Application of PhaNP@Syn71 to a mouse wound infection model exhibited high biocompatibility in vivo while showing immediate stabilization of the wound size, and infection free wound healing. Our results suggest the robust utility of antimicrobial peptide-conjugated phage-mimicking nanoparticles as a highly effective antibacterial system that can combat bacterial infections consistently while avoiding the emergence of resistant bacterial strains.
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Affiliation(s)
- Johanna Olesk
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame Indiana USA +1 574 631 7868
| | - Deborah Donahue
- W. M. Keck Center for Transgene Research, University of Notre Dame Notre Dame Indiana USA
| | - Jessica Ross
- Department of Biological Sciences, University of Notre Dame Notre Dame Indiana USA
| | - Conor Sheehan
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame Indiana USA
| | - Zach Bennett
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame Indiana USA +1 574 631 7868
| | - Kevin Armknecht
- Department of Pre-Professional Studies, University of Notre Dame Notre Dame Indiana USA
| | - Carlie Kudary
- Berthiaume Institute for Precision Health, University of Notre Dame Notre Dame Indiana USA
| | - Juliane Hopf
- Berthiaume Institute for Precision Health, University of Notre Dame Notre Dame Indiana USA
| | - Victoria A Ploplis
- W. M. Keck Center for Transgene Research, University of Notre Dame Notre Dame Indiana USA
| | - Francis J Castellino
- W. M. Keck Center for Transgene Research, University of Notre Dame Notre Dame Indiana USA
| | - Shaun W Lee
- Department of Biological Sciences, University of Notre Dame Notre Dame Indiana USA
| | - Prakash D Nallathamby
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame Indiana USA +1 574 631 7868
- Berthiaume Institute for Precision Health, University of Notre Dame Notre Dame Indiana USA
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2
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Wilde S, Dash A, Johnson A, Mackey K, Okumura CYM, LaRock CN. Detoxification of reactive oxygen species by the hyaluronic acid capsule of group A Streptococcus. Infect Immun 2023; 91:e0025823. [PMID: 37874162 PMCID: PMC10652860 DOI: 10.1128/iai.00258-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/17/2023] [Indexed: 10/25/2023] Open
Abstract
The pro-inflammatory cytokine IL-6 regulates antimicrobial responses that are broadly crucial in the defense against infection. Our prior work shows that IL-6 promotes the killing of the M4 serotype group A Streptococcus (GAS) but does not impact the globally disseminated M1T1 serotype associated with invasive infections. Using in vitro and in vivo infection models, we show that IL-6 induces phagocyte reactive oxygen species (ROS) that are responsible for the differential susceptibility of M4 and M1T1 GAS to IL-6-mediated defenses. Clinical isolates naturally deficient in capsule, or M1T1 strains deficient in capsule production, are sensitive to this ROS killing. The GAS capsule is made of hyaluronic acid, an antioxidant that detoxifies ROS and can protect acapsular M4 GAS when added exogenously. During in vitro interactions with macrophages and neutrophils, acapsular GAS can also be rescued with the antioxidant N-acetylcysteine, suggesting this is a major virulence contribution of the capsule. In an intradermal infection model with gp91phox -/- (chronic granulomatous disease [CGD]) mice, phagocyte ROS production had a modest effect on bacterial proliferation and the cytokine response but significantly limited the size of the bacterial lesion in the skin. These data suggest that the capsule broadly provides enhanced resistance to phagocyte ROS but is not essential for invasive infection. Since capsule-deficient strains are observed across several GAS serotypes and are competent for transmission and both mild and invasive infections, additional host or microbe factors may contribute to ROS detoxification during GAS infections.
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Affiliation(s)
- Shyra Wilde
- Microbiology and Molecular Genetics Program, Graduate Division of Biological and Biomedical Sciences, Laney Graduate School, Emory University, Atlanta, Georgia, USA
| | - Ananya Dash
- Immunology and Molecular Pathogenesis Program, Graduate Division of Biological and Biomedical Sciences, Laney Graduate School, Emory University, Atlanta, Georgia, USA
| | - Anders Johnson
- Microbiology and Molecular Genetics Program, Graduate Division of Biological and Biomedical Sciences, Laney Graduate School, Emory University, Atlanta, Georgia, USA
| | - Kialani Mackey
- Department of Biology, Occidental College, Los Angeles, California, USA
| | | | - Christopher N. LaRock
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, USA
- Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
- Antibiotic Resistance Center, Emory University School of Medicine, Atlanta, Georgia, USA
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3
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Taheri A, Bremmell KE, Joyce P, Prestidge CA. Battle of the milky way: Lymphatic targeted drug delivery for pathogen eradication. J Control Release 2023; 363:507-524. [PMID: 37797891 DOI: 10.1016/j.jconrel.2023.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/14/2023] [Accepted: 10/01/2023] [Indexed: 10/07/2023]
Abstract
Many viruses, bacteria, and parasites rely on the lymphatic system for survival, replication, and dissemination. While conventional anti-infectives can combat infection-causing agents in the bloodstream, they do not reach the lymphatic system to eradicate the pathogens harboured there. This can result in ineffective drug exposure and reduce treatment effectiveness. By developing effective lymphatic delivery strategies for antiviral, antibacterial, and antiparasitic drugs, their systemic pharmacokinetics may be improved, as would their ability to reach their target pathogens within the lymphatics, thereby improving clinical outcomes in a variety of acute and chronic infections with lymphatic involvement (e.g., acquired immunodeficiency syndrome, tuberculosis, and filariasis). Here, we discuss approaches to targeting anti-infective drugs to the intestinal and dermal lymphatics, aiming to eliminate pathogen reservoirs and interfere with their survival and reproduction inside the lymphatic system. These include optimized lipophilic prodrugs and drug delivery systems that promote lymphatic transport after oral and dermal drug intake. For intestinal lymphatic delivery via the chylomicron pathway, molecules should have logP values >5 and long-chain triglyceride solubilities >50 mg/g, and for dermal lymphatic delivery via interstitial lymphatic drainage, nanoparticle formulations with particle size between 10 and 100 nm are generally preferred. Insight from this review may promote new and improved therapeutic solutions for pathogen eradication and combating infective diseases, as lymphatic system involvement in pathogen dissemination and drug resistance has been neglected compared to other pathways leading to treatment failure.
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Affiliation(s)
- Ali Taheri
- Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Kristen E Bremmell
- Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Paul Joyce
- Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Clive A Prestidge
- Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia.
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4
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Karan S, Cho MY, Lee H, Kim HM, Park HS, Han EH, Sessler JL, Hong KS. Hypoxia-Directed and Self-Immolative Theranostic Agent: Imaging and Treatment of Cancer and Bacterial Infections. J Med Chem 2023; 66:14175-14187. [PMID: 37823731 PMCID: PMC10614179 DOI: 10.1021/acs.jmedchem.3c01274] [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: 07/13/2023] [Indexed: 10/13/2023]
Abstract
The impact of bacteria on cancer progression and treatment is becoming increasingly recognized. Cancer-associated bacteria are linked to metastases, reduced efficacy, and survival challenges. In this study, we present a sensitive hypoxia-activated prodrug, NR-NO2, which comprises an antibiotic combined with a chemotherapeutic. This prodrug demonstrates rapid and robust fluorescence enhancement and exhibits potent antibacterial activity against both Gram-positive and Gram-negative bacteria as well as tumor cells. Upon activation, NR-NO2 produces a distinct "fluorescence-on" signal, enabling real-time drug release monitoring. By leveraging elevated nitroreductase in cancer cells, NR-NO2 gives rise to heightened bacterial cytotoxicity while sparing normal cells. In A549 solid tumor-bearing mice, NR-NO2 selectively accumulated at tumor sites, displaying fluorescence signals under hypoxia superior to those of a corresponding prodrug-like control. These findings highlight the potential of NR-NO2 as a promising cancer therapy prodrug that benefits from targeted release, antibacterial impact, and imaging-based guidance.
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Affiliation(s)
- Sanu Karan
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
| | - Mi Young Cho
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
| | - Hyunseung Lee
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
| | - Hyun Min Kim
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
| | - Hye Sun Park
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
| | - Eun Hee Han
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
| | - Jonathan L. Sessler
- Department
of Chemistry, The University of Texas at
Austin, Austin, Texas 78712-1224, United States
| | - Kwan Soo Hong
- Research
Center for Bioconvergence Analysis, Korea
Basic Science Institute, Cheongju 28119, Republic
of Korea
- Graduate
School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
- Department
of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
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5
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Schorr L, Mathies M, Elinav E, Puschhof J. Intracellular bacteria in cancer-prospects and debates. NPJ Biofilms Microbiomes 2023; 9:76. [PMID: 37813921 PMCID: PMC10562400 DOI: 10.1038/s41522-023-00446-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 09/26/2023] [Indexed: 10/11/2023] Open
Abstract
Recent evidence suggests that some human cancers may harbor low-biomass microbial ecosystems, spanning bacteria, viruses, and fungi. Bacteria, the most-studied kingdom in this context, are suggested by these studies to localize within cancer cells, immune cells and other tumor microenvironment cell types, where they are postulated to impact multiple cancer-related functions. Herein, we provide an overview of intratumoral bacteria, while focusing on intracellular bacteria, their suggested molecular activities, communication networks, host invasion and evasion strategies, and long-term colonization capacity. We highlight how the integration of sequencing-based and spatial techniques may enable the recognition of bacterial tumor niches. We discuss pitfalls, debates and challenges in decisively proving the existence and function of intratumoral microbes, while reaching a mechanistic elucidation of their impacts on tumor behavior and treatment responses. Together, a causative understanding of possible roles played by intracellular bacteria in cancer may enable their future utilization in diagnosis, patient stratification, and treatment.
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Affiliation(s)
- Lena Schorr
- Microbiome and Cancer Division, German Cancer Research Center, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Marius Mathies
- Microbiome and Cancer Division, German Cancer Research Center, Heidelberg, Germany
| | - Eran Elinav
- Microbiome and Cancer Division, German Cancer Research Center, Heidelberg, Germany.
- Systems Immunology Department, Weizmann Institute of Science, Rehovot, 7610001, Israel.
| | - Jens Puschhof
- Microbiome and Cancer Division, German Cancer Research Center, Heidelberg, Germany.
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6
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Hou X, Shi H, Jiang Y, Li X, Chen K, Li Q, Liu R. Transcriptome analysis reveals the neuroactive receptor genes response to Streptococcus agalactiae infection in tilapia, Oreochromis niloticus. FISH & SHELLFISH IMMUNOLOGY 2023; 141:109090. [PMID: 37722443 DOI: 10.1016/j.fsi.2023.109090] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/13/2023] [Accepted: 09/16/2023] [Indexed: 09/20/2023]
Abstract
The detailed crosstalk between the neuroendocrine and immune systems in Oreochromis niloticus, an economically important fish, in response to pathogenic infections, remains unclear. This study revealed the head kidney transcriptional profiles of O. niloticus upon infections with Streptococcus agalactiae, a prevalent pathogen known to cause severe meningitis. Twelve cDNA libraries of O. niloticus head kidney, representing four treatment time points (0, 6, 24, and 48 h), were constructed and a total of 2,528 differentially expressed genes were identified based on pairwise comparisons. KEGG pathway analysis revealed a significant enrichment of the 'neuroactive ligand-receptor interaction' pathway (ko04080), with 13 genes exhibiting differential expression during S. agalactiae infection. Among these, six neuroactive receptor genes (lepr, nr3c1, ptger4, thrb, tspo, and β2-ar) were selected, cloned, and characterized. Although these genes are ubiquitously expressed, and in head kidney leukocytes, their expression was mainly observed in T cells, Mo/Mφ, and NCCs, which are characterized by antimicrobial responses. Furthermore, we examined the response patterns of these six neuroactive receptor genes to gram-positive (S. agalactiae) and gram-negative (Aeromonas hydrophila) bacteria in four different tissues. Notably, lepr, ptger4, tspo, and β2-ar were upregulated in all selected tissues in response to S. agalactiae and A. hydrophila infections. However, nr3c1 and thrb were downregulated in response to S. agalactiae infection in the head kidney and spleen, whereas nr3c1 was upregulated, and thrb was unresponsive to A. hydrophila infection. Our findings provide a theoretical foundation for understanding new links between the neuroendocrine and immune systems during bacterial infection in teleost fish.
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Affiliation(s)
- Xitan Hou
- Institute of Forensic Medicine and Laboratory Medicine, Jining Medical University, Jining, China.
| | - Haokai Shi
- College of Medical Engineering, Jining Medical University, Jining, China
| | - Yan Jiang
- Shandong Freshwater Fisheries Research Institute, Jinan, China
| | - Xiaoke Li
- Institute of Forensic Medicine and Laboratory Medicine, Jining Medical University, Jining, China
| | - Kaiqi Chen
- Institute of Forensic Medicine and Laboratory Medicine, Jining Medical University, Jining, China
| | - Qi Li
- Fisheries College, Jimei University, Xiamen, China.
| | - Ruonan Liu
- College of Medical Engineering, Jining Medical University, Jining, China.
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7
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McMinn PH, Ahmed A, Huttenlocher A, Beebe DJ, Kerr SC. The lymphatic endothelium-derived follistatin: activin A axis regulates neutrophil motility in response to Pseudomonas aeruginosa. Integr Biol (Camb) 2023; 15:zyad003. [PMID: 36781971 PMCID: PMC10101905 DOI: 10.1093/intbio/zyad003] [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: 06/30/2022] [Revised: 12/02/2022] [Accepted: 01/23/2023] [Indexed: 02/15/2023]
Abstract
The lymphatic system plays an active role during infection, however the role of lymphatic-neutrophil interactions in host-defense responses is not well understood. During infection with pathogens such as Pseudomonas aeruginosa, Staphylococcus aureus and Yersinia pestis, neutrophils traffic from sites of infection through the lymphatic vasculature, to draining lymph nodes to interact with resident lymphocytes. This process is poorly understood, in part, due to the lack of in vitro models of the lymphatic system. Here we use a 3D microscale lymphatic vessel model to examine neutrophil-lymphatic cell interactions during host defense responses to pathogens. In previous work, we have shown that follistatin is secreted at high concentrations by lymphatic endothelial cells during inflammation. Follistatin inhibits activin A, a member of the TGF-β superfamily, and, together, these molecules form a signaling pathway that plays a role in regulating both innate and adaptive immune responses. Although follistatin and activin A are constitutively produced in the pituitary, gonads and skin, their major source in the serum and their effects on neutrophils are poorly understood. Here we report a microfluidic model that includes both blood and lymphatic endothelial vessels, and neutrophils to investigate neutrophil-lymphatic trafficking during infection with P. aeruginosa. We found that lymphatic endothelial cells produce secreted factors that increase neutrophil migration toward P. aeruginosa, and are a significant source of both follistatin and activin A during Pseudomonas infection. We determined that follistatin produced by lymphatic endothelial cells inhibits activin A, resulting in increased neutrophil migration. These data suggest that the follistatin:activin A ratio influences neutrophil trafficking during infection with higher ratios increasing neutrophil migration.
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Affiliation(s)
- Patrick H McMinn
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Adeel Ahmed
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, USA
- Department of Pediatrics, University of Wisconsin-Madison, Madison, WI, USA
| | - David J Beebe
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI, USA
| | - Sheena C Kerr
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI, USA
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI, USA
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8
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Senchukova MA. Genetic heterogeneity of colorectal cancer and the microbiome. World J Gastrointest Oncol 2023; 15:443-463. [PMID: 37009315 PMCID: PMC10052667 DOI: 10.4251/wjgo.v15.i3.443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/06/2023] [Accepted: 02/22/2023] [Indexed: 03/14/2023] Open
Abstract
In 2020, the International Agency for Research on Cancer and the World Health Organization's GLOBOCAN database ranked colorectal cancer (CRC) as the third most common cancer in the world. Most cases of CRC (> 95%) are sporadic and develop from colorectal polyps that can progress to intramucosal carcinoma and CRC. Increasing evidence is accumulating that the gut microbiota can play a key role in the initiation and progression of CRC, as well as in the treatment of CRC, acting as an important metabolic and immunological regulator. Factors that may determine the microbiota role in CRC carcinogenesis include inflammation, changes in intestinal stem cell function, impact of bacterial metabolites on gut mucosa, accumulation of genetic mutations and other factors. In this review, I discuss the major mechanisms of the development of sporadic CRC, provide detailed characteristics of the bacteria that are most often associated with CRC, and analyze the role of the microbiome and microbial metabolites in inflammation initiation, activation of proliferative activity in intestinal epithelial and stem cells, and the development of genetic and epigenetic changes in CRC. I consider long-term studies in this direction to be very important, as they open up new opportunities for the treatment and prevention of CRC.
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Affiliation(s)
- Marina A Senchukova
- Department of Oncology, Orenburg State Medical University, Orenburg 460000, Russia
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9
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Hua C, Urbina T, Bosc R, Parks T, Sriskandan S, de Prost N, Chosidow O. Necrotising soft-tissue infections. THE LANCET. INFECTIOUS DISEASES 2023; 23:e81-e94. [PMID: 36252579 DOI: 10.1016/s1473-3099(22)00583-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/05/2022] [Accepted: 08/22/2022] [Indexed: 11/07/2022]
Abstract
The incidence of necrotising soft-tissue infections has increased during recent decades such that most physicians might see at least one case of these potentially life-threatening infections in their career. Despite advances in care, necrotising soft-tissue infections are still associated with high morbidity and mortality, underlining a need for continued education of the medical community. In particular, failure to suspect necrotising soft-tissue infections, fuelled by poor awareness of the disease, promotes delays to first surgical debridement, amplifying disease severity and adverse outcomes. This Review will focus on practical approaches to management of necrotising soft-tissue infections including prompt recognition, initiation of specific management, exploratory surgery, and aftercare. Increased alertness and awareness for these infections should improve time to diagnosis and early referral to specialised centres, with improvement in the prognosis of necrotising soft-tissue infections.
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Affiliation(s)
- Camille Hua
- Service de Dermatologie, Assistance Publique-Hôpitaux de Paris, Créteil, France; Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France; Epidemiology in Dermatology and Evaluation of Therapeutics, Université Paris Est Créteil, Créteil, France; Groupe Infectiologie Dermatologique-Infections Sexuellement Transmissibles, Société Française de Dermatologie, Paris, France
| | - Tomas Urbina
- Service de Médecine Intensive Réanimation, Hôpital Saint-Antoine, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Romain Bosc
- Service de Chirurgie Plastique, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - Tom Parks
- Department of Infectious Diseases, Imperial College London, London, UK
| | - Shiranee Sriskandan
- Department of Infectious Diseases, Imperial College London, London, UK; MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - Nicolas de Prost
- Service de Médecine Intensive Réanimation, Assistance Publique-Hôpitaux de Paris, Créteil, France; CARMAS Research Group, UPEC-Université Paris-Est Créteil Val de Marne, Faculté de médecine de Créteil, Créteil, France
| | - Olivier Chosidow
- Service de Dermatologie, Assistance Publique-Hôpitaux de Paris, Créteil, France; Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France; Groupe Infectiologie Dermatologique-Infections Sexuellement Transmissibles, Société Française de Dermatologie, Paris, France; Research group Dynamyc, Faculté de Santé de Créteil, Ecole Nationale Vétérinaire d'Alfort, USC ANSES, Université Paris-Est Créteil, Créteil, France.
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10
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Takeda A, Salmi M, Jalkanen S. Lymph node lymphatic endothelial cells as multifaceted gatekeepers in the immune system. Trends Immunol 2023; 44:72-86. [PMID: 36463086 DOI: 10.1016/j.it.2022.10.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/20/2022] [Accepted: 10/28/2022] [Indexed: 12/03/2022]
Abstract
Single-cell technologies have recently allowed the identification of multiple lymphatic endothelial cell (LEC) subsets in subcapsular, paracortical, medullary, and other lymph node (LN) sinus systems in mice and humans. New analyses show that LECs serve key immunological functions in the LN stroma during immune responses. We discuss the roles of different LEC types in guiding leukocyte and cancer cell trafficking to and from the LN parenchyma, in capturing microbes, and in transporting, presenting, and storing lymph-borne antigens in distinct types of lymphatic sinuses. We underscore specific adaptations of human LECs and raise unanswered questions concerning LEC functions in human disease. Despite our limited understanding of human lymphatics - hampering clinical translation in inflammation and metastasis - we support the potential of LN LECs as putative targets for boosting/inhibiting immunoreactivity.
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Affiliation(s)
- Akira Takeda
- MediCity and InFLAMES Flagship, University of Turku, Turku, Finland
| | - Marko Salmi
- MediCity and InFLAMES Flagship, University of Turku, Turku, Finland; Institute of Biomedicine, University of Turku, Turku, Finland
| | - Sirpa Jalkanen
- MediCity and InFLAMES Flagship, University of Turku, Turku, Finland; Institute of Biomedicine, University of Turku, Turku, Finland.
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11
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Ivleva EA, Grivennikov SI. Microbiota-driven mechanisms at different stages of cancer development. Neoplasia 2022; 32:100829. [PMID: 35933824 PMCID: PMC9364013 DOI: 10.1016/j.neo.2022.100829] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 07/08/2022] [Accepted: 07/19/2022] [Indexed: 02/08/2023]
Abstract
A myriad of microbes living together with the host constitutes the microbiota, and the microbiota exerts very diverse functions in the regulation of host physiology. Microbiota regulates cancer initiation, progression, metastasis, and responses to therapy. Here we review known pro-tumorigenic and anti-tumorigenic functions of microbiota, and mechanisms of how microbes can shape tumor microenvironment and affect cancer cells as well as activation and functionality of immune and stromal cells within the tumor. While some of these mechanisms are distal, often distinct members of microbiota travel with and establish colonization with the tumors in the distant organs. We further briefly describe recent findings regarding microbiota composition in metastasis and highlight important future directions and considerations for the manipulation of microbiota for cancer treatment.
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Affiliation(s)
- Elena A Ivleva
- Department of Medicine and Department of Biomedical Sciences, Cedars-Sinai Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Sergei I Grivennikov
- Department of Medicine and Department of Biomedical Sciences, Cedars-Sinai Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA.
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12
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Jha B, Reverte M, Ronet C, Prevel F, Morgenthaler FD, Desponds C, Lye LF, Owens KL, Scarpellino L, Dubey LK, Sabine A, Petrova TV, Luther SA, Beverley SM, Fasel N. In and out: Leishmania metastasis by hijacking lymphatic system and migrating immune cells. Front Cell Infect Microbiol 2022; 12:941860. [PMID: 36034709 PMCID: PMC9414205 DOI: 10.3389/fcimb.2022.941860] [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: 05/11/2022] [Accepted: 07/19/2022] [Indexed: 11/22/2022] Open
Abstract
The lymphatic system plays a crucial role in mounting immune response against intracellular pathogens, and recent studies have documented its role in facilitating tumor dissemination linked largely with cancer cells. However, in mucocutaneous leishmaniasis (MCL) caused by Leishmania Viannia subgenus showing infectious metastasis and resulting in severe distant secondary lesions, the route of escape of these parasites to secondary sites has not yet been investigated in detail. Our results demonstrated that when infection was associated with inflammation and additionally exacerbated by the presence of dsRNA viral endosymbiont (LRV1), lymphatic vessels could serve as efficient routes for infected cells to egress from the primary site and colonize distant organs. We challenged this hypothesis by using the intracellular Leishmania protozoan parasites Leishmania guyanensis (Lgy) associated with or without a dsRNA viral endosymbiont, exacerbating the infection and responsible for a strong inflammatory response, and favoring metastasis of the infection. We analyzed possible cargo cells and the routes of dissemination through flow cytometry, histological analysis, and in vivo imaging in our metastatic model to show that parasites disseminated not only intracellularly but also as free extracellular parasites using migrating immune cells, lymph nodes (LNs), and lymph vessels, and followed intricate connections of draining and non-draining lymph node to finally end up in the blood and in distant skin, causing new lesions.
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Affiliation(s)
- Baijayanti Jha
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
| | - Marta Reverte
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
| | - Catherine Ronet
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
- Department of Oncology, Ludwig Institute for Cancer Research Lausanne, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Florence Prevel
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
| | | | - Chantal Desponds
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
| | - Lon-Fye Lye
- Department of Molecular Microbiology, School of Medicine, Washington University, St. Louis, MO, United States
| | - Katherine L. Owens
- Department of Molecular Microbiology, School of Medicine, Washington University, St. Louis, MO, United States
| | | | - Lalit Kumar Dubey
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
- Centre for Microvascular Research, John Vane Science Centre, Queen Mary University of London, London, United Kingdom
| | - Amélie Sabine
- Department of Oncology and Ludwig Institute for Cancer Research, University of Lausanne and Centre Hospitalier Universitaire Vaudois, Epalinges, Switzerland
| | - Tatiana V. Petrova
- Department of Oncology and Ludwig Institute for Cancer Research, University of Lausanne and Centre Hospitalier Universitaire Vaudois, Epalinges, Switzerland
| | - Sanjiv A. Luther
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
| | - Stephen M. Beverley
- Department of Molecular Microbiology, School of Medicine, Washington University, St. Louis, MO, United States
| | - Nicolas Fasel
- Department of Immunobiology, University of Lausanne, Epalinges, Switzerland
- *Correspondence: Nicolas Fasel,
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13
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Harimoto T, Hahn J, Chen YY, Im J, Zhang J, Hou N, Li F, Coker C, Gray K, Harr N, Chowdhury S, Pu K, Nimura C, Arpaia N, Leong KW, Danino T. A programmable encapsulation system improves delivery of therapeutic bacteria in mice. Nat Biotechnol 2022; 40:1259-1269. [PMID: 35301496 PMCID: PMC9371971 DOI: 10.1038/s41587-022-01244-y] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 01/28/2022] [Indexed: 01/27/2023]
Abstract
Living bacteria therapies have been proposed as an alternative approach to treating a broad array of cancers. In this study, we developed a genetically encoded microbial encapsulation system with tunable and dynamic expression of surface capsular polysaccharides that enhances systemic delivery. Based on a small RNA screen of capsular biosynthesis pathways, we constructed inducible synthetic gene circuits that regulate bacterial encapsulation in Escherichia coli Nissle 1917. These bacteria are capable of temporarily evading immune attack, whereas subsequent loss of encapsulation results in effective clearance in vivo. This dynamic delivery strategy enabled a ten-fold increase in maximum tolerated dose of bacteria and improved anti-tumor efficacy in murine models of cancer. Furthermore, in situ encapsulation increased the fraction of microbial translocation among mouse tumors, leading to efficacy in distal tumors. The programmable encapsulation system promises to enhance the therapeutic utility of living engineered bacteria for cancer. Transient capsule induction allows engineered bacteria to evade initial immune surveillance in a colorectal cancer model.
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Affiliation(s)
- Tetsuhiro Harimoto
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Jaeseung Hahn
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Yu-Yu Chen
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Jongwon Im
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Joanna Zhang
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Nicholas Hou
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Fangda Li
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Courtney Coker
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Kelsey Gray
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Nicole Harr
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Sreyan Chowdhury
- Department of Biomedical Engineering, Columbia University, New York, NY, USA.,Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Kelly Pu
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Clare Nimura
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Nicholas Arpaia
- Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA.,Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA
| | - Kam W Leong
- Department of Biomedical Engineering, Columbia University, New York, NY, USA. .,Department of Systems Biology, Columbia University Medical Center, New York, NY, USA.
| | - Tal Danino
- Department of Biomedical Engineering, Columbia University, New York, NY, USA. .,Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA. .,Data Science Institute, Columbia University, New York, NY, USA.
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14
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Magold AI, Swartz MA. Pathogenic Exploitation of Lymphatic Vessels. Cells 2022; 11:979. [PMID: 35326430 PMCID: PMC8946894 DOI: 10.3390/cells11060979] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 02/06/2023] Open
Abstract
Lymphatic vessels provide a critical line of communication between peripheral tissues and their draining lymph nodes, which is necessary for robust immune responses against infectious agents. At the same time, lymphatics help shape the nature and kinetics of immune responses to ensure resolution, limit tissue damage, and prevent autoimmune responses. A variety of pathogens have developed strategies to exploit these functions, from multicellular organisms like nematodes to bacteria, viruses, and prions. While lymphatic vessels serve as transport routes for the dissemination of many pathogens, their hypoxic and immune-suppressive environments can provide survival niches for others. Lymphatics can be exploited as perineural niches, for inter-organ distribution among highly motile carrier cells, as effective replicative niches, and as alternative routes in response to therapy. Recent studies have broadened our understanding of lymphatic involvement in pathogenic spread to include a wider range of pathogens, as well as new mechanisms of exploitation, which we summarize here.
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Affiliation(s)
- Alexandra I. Magold
- Pritzker School for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA;
| | - Melody A. Swartz
- Pritzker School for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA;
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL 60637, USA
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15
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You L, Zhou J, Xin Z, Hauck JS, Na F, Tang J, Zhou X, Lei Z, Ying B. Novel directions of precision oncology: circulating microbial DNA emerging in cancer-microbiome areas. PRECISION CLINICAL MEDICINE 2022; 5:pbac005. [PMID: 35692444 PMCID: PMC9026200 DOI: 10.1093/pcmedi/pbac005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/26/2022] [Accepted: 01/27/2022] [Indexed: 02/05/2023] Open
Abstract
Microbiome research has extended into the cancer area in the past decades. Microbes can affect oncogenesis, progression, and treatment response through various mechanisms, including direct regulation and indirect impacts. Microbiota-associated detection methods and agents have been developed to facilitate cancer diagnosis and therapy. Additionally, the cancer microbiome has recently been redefined. The identification of intra-tumoral microbes and cancer-related circulating microbial DNA (cmDNA) has promoted novel research in the cancer-microbiome area. In this review, we define the human system of commensal microbes and the cancer microbiome from a brand-new perspective and emphasize the potential value of cmDNA as a promising biomarker in cancer liquid biopsy. We outline all existing studies on the relationship between cmDNA and cancer and the outlook for potential preclinical and clinical applications of cmDNA in cancer precision medicine, as well as critical problems to be overcome in this burgeoning field.
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Affiliation(s)
- Liting You
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Juan Zhou
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhaodan Xin
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - J Spencer Hauck
- Department of Pathology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Feifei Na
- Department of Thoracic Cancer, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jie Tang
- Department of Clinical Laboratory, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Mianyang 621000,China
| | - Xiaohan Zhou
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zichen Lei
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Binwu Ying
- Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
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16
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Siggins MK, Sriskandan S. Bacterial Lymphatic Metastasis in Infection and Immunity. Cells 2021; 11:33. [PMID: 35011595 PMCID: PMC8750085 DOI: 10.3390/cells11010033] [Citation(s) in RCA: 6] [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: 09/16/2021] [Revised: 12/09/2021] [Accepted: 12/16/2021] [Indexed: 12/12/2022] Open
Abstract
Lymphatic vessels permeate tissues around the body, returning fluid from interstitial spaces back to the blood after passage through the lymph nodes, which are important sites for adaptive responses to all types of pathogens. Involvement of the lymphatics in the pathogenesis of bacterial infections is not well studied. Despite offering an obvious conduit for pathogen spread, the lymphatic system has long been regarded to bar the onward progression of most bacteria. There is little direct data on live virulent bacteria, instead understanding is largely inferred from studies investigating immune responses to viruses or antigens in lymph nodes. Recently, we have demonstrated that extracellular bacterial lymphatic metastasis of virulent strains of Streptococcus pyogenes drives systemic infection. Accordingly, it is timely to reconsider the role of lymph nodes as absolute barriers to bacterial dissemination in the lymphatics. Here, we summarise the routes and mechanisms by which an increasing variety of bacteria are acknowledged to transit through the lymphatic system, including those that do not necessarily require internalisation by host cells. We discuss the anatomy of the lymphatics and other factors that influence bacterial dissemination, as well as the consequences of underappreciated bacterial lymphatic metastasis on disease and immunity.
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Affiliation(s)
- Matthew K. Siggins
- National Heart and Lung Institute, Imperial College London, London W2 1PG, UK
- Department of Infectious Disease, Imperial College London, London W12 0NN, UK
| | - Shiranee Sriskandan
- Department of Infectious Disease, Imperial College London, London W12 0NN, UK
- MRC Centre for Molecular Bacteriology and Infection, Imperial College London, London SW7 2DD, UK
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17
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McKenna S, Huse KK, Giblin S, Pearson M, Majid Al Shibar MS, Sriskandan S, Matthews S, Pease JE. The Role of Streptococcal Cell-Envelope Proteases in Bacterial Evasion of the Innate Immune System. J Innate Immun 2021; 14:69-88. [PMID: 34649250 PMCID: PMC9082167 DOI: 10.1159/000516956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 04/19/2021] [Indexed: 11/19/2022] Open
Abstract
Bacteria possess the ability to evolve varied and ingenious strategies to outwit the host immune system, instigating an evolutionary arms race. Proteases are amongst the many weapons employed by bacteria, which specifically cleave and neutralize key signalling molecules required for a coordinated immune response. In this article, we focus on a family of S8 subtilisin-like serine proteases expressed as cell-envelope proteases (CEPs) by group A and group B streptococci. Two of these proteases known as Streptococcus pyogenes CEP (SpyCEP) and C5a peptidase cleave the chemokine CXCL8 and the complement fragment C5a, respectively. Both CXCL8 and C5a are potent neutrophil-recruiting chemokines, and by neutralizing their activity, streptococci evade a key defence mechanism of innate immunity. We review the mechanisms by which CXCL8 and C5a recruit neutrophils and the characterization of SpyCEP and C5a peptidase, including both in vitro and in vivo studies. Recently described structural insights into the function of this CEP family are also discussed. We conclude by examining the progress of prototypic vaccines incorporating SpyCEP and C5a peptidase in their preparation. Since streptococci-producing SpyCEP and C5a peptidase are responsible for a considerable global disease burden, targeting these proteases by vaccination strategies or by small-molecule antagonists should provide protection from and promote the resolution of streptococcal infections.
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Affiliation(s)
- Sophie McKenna
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - Kristin Krohn Huse
- Department of Infectious Disease, Imperial College London, London, United Kingdom
| | - Sean Giblin
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Max Pearson
- Department of Infectious Disease, Imperial College London, London, United Kingdom
| | | | - Shiranee Sriskandan
- Department of Infectious Disease, Imperial College London, London, United Kingdom
| | - Stephen Matthews
- Department of Life Sciences, Imperial College London, London, United Kingdom
| | - James Edward Pease
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
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18
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Hullahalli K, Waldor MK. Pathogen clonal expansion underlies multiorgan dissemination and organ-specific outcomes during murine systemic infection. eLife 2021; 10:e70910. [PMID: 34636322 PMCID: PMC8545400 DOI: 10.7554/elife.70910] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 10/07/2021] [Indexed: 12/31/2022] Open
Abstract
The dissemination of pathogens through blood and their establishment within organs lead to severe clinical outcomes. However, the within-host dynamics that underlie pathogen spread to and clearance from systemic organs remain largely uncharacterized. In animal models of infection, the observed pathogen population results from the combined contributions of bacterial replication, persistence, death, and dissemination, each of which can vary across organs. Quantifying the contribution of each these processes is required to interpret and understand experimental phenotypes. Here, we leveraged STAMPR, a new barcoding framework, to investigate the population dynamics of extraintestinal pathogenic Escherichia coli, a common cause of bacteremia, during murine systemic infection. We show that while bacteria are largely cleared by most organs, organ-specific clearance failures are pervasive and result from dramatic expansions of clones representing less than 0.0001% of the inoculum. Clonal expansion underlies the variability in bacterial burden between animals, and stochastic dissemination of clones profoundly alters the pathogen population structure within organs. Despite variable pathogen expansion events, host bottlenecks are consistent yet highly sensitive to infection variables, including inoculum size and macrophage depletion. We adapted our barcoding methodology to facilitate multiplexed validation of bacterial fitness determinants identified with transposon mutagenesis and confirmed the importance of bacterial hexose metabolism and cell envelope homeostasis pathways for organ-specific pathogen survival. Collectively, our findings provide a comprehensive map of the population biology that underlies bacterial systemic infection and a framework for barcode-based high-resolution mapping of infection dynamics.
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Affiliation(s)
- Karthik Hullahalli
- Department of Microbiology, Harvard Medical SchoolBostonUnited States
- Division of Infectious Diseases, Brigham & Women’s HospitalBostonUnited States
| | - Matthew K Waldor
- Department of Microbiology, Harvard Medical SchoolBostonUnited States
- Division of Infectious Diseases, Brigham & Women’s HospitalBostonUnited States
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19
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Richter J, Brouwer S, Schroder K, Walker MJ. Inflammasome activation and IL-1β signalling in group A Streptococcus disease. Cell Microbiol 2021; 23:e13373. [PMID: 34155776 DOI: 10.1111/cmi.13373] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 05/17/2021] [Indexed: 01/02/2023]
Abstract
Group A Streptococcus (GAS) is a Gram-positive bacterial pathogen that causes significant morbidity and mortality worldwide. Recent clinical evidence suggests that the inflammatory marker interleukin-1β (IL-1β) plays an important role in GAS disease progression, and presents a potential target for therapeutic intervention. Interaction with GAS activates the host inflammasome pathway to stimulate production and secretion of IL-1β, but GAS can also stimulate IL-1β production in an inflammasome-independent manner. This review highlights progress that has been made in understanding the importance of host cell inflammasomes and IL-1 signalling in GAS disease, and explores challenges and unsolved problems in this host-pathogen interaction. TAKE AWAY: Inflammasome signalling during GAS infection is an emerging field of research. GAS modulates the NLRP3 inflammasome pathway through multiple mechanisms. SpeB contributes to IL-1β production independently of the inflammasome pathway. IL-1β signalling can be host-protective, but also drive severe GAS disease.
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Affiliation(s)
- Johanna Richter
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Queensland, Australia
| | - Stephan Brouwer
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Queensland, Australia
| | - Kate Schroder
- Australian Infectious Diseases Research Centre, Institute for Molecular Bioscience and IMB Centre for Inflammation and Disease Research, The University of Queensland, St. Lucia, Queensland, Australia
| | - Mark J Walker
- Australian Infectious Diseases Research Centre and School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Queensland, Australia
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20
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Castro SA, Dorfmueller HC. A brief review on Group A Streptococcus pathogenesis and vaccine development. ROYAL SOCIETY OPEN SCIENCE 2021; 8:201991. [PMID: 33959354 PMCID: PMC8074923 DOI: 10.1098/rsos.201991] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Streptococcus pyogenes, also known as Group A Streptococcus (GAS), is a Gram-positive human-exclusive pathogen, responsible for more than 500 000 deaths annually worldwide. Upon infection, GAS commonly triggers mild symptoms such as pharyngitis, pyoderma and fever. However, recurrent infections or prolonged exposure to GAS might lead to life-threatening conditions. Necrotizing fasciitis, streptococcal toxic shock syndrome and post-immune mediated diseases, such as poststreptococcal glomerulonephritis, acute rheumatic fever and rheumatic heart disease, contribute to very high mortality rates in non-industrialized countries. Though an initial reduction in GAS infections was observed in high-income countries, global outbreaks of GAS, causing rheumatic fever and acute poststreptococcal glomerulonephritis, have been reported over the last decade. At the same time, our understanding of GAS pathogenesis and transmission has vastly increased, with detailed insight into the various stages of infection, beginning with adhesion, colonization and evasion of the host immune system. Despite deeper knowledge of the impact of GAS on the human body, the development of a successful vaccine for prophylaxis of GAS remains outstanding. In this review, we discuss the challenges involved in identifying a universal GAS vaccine and describe several potential vaccine candidates that we believe warrant pursuit.
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Affiliation(s)
- Sowmya Ajay Castro
- Division of Molecular Microbiology, School of Life Sciences, University of Dundee, Dow Street, Dundee, DD1 5EH, UK
| | - Helge C. Dorfmueller
- Division of Molecular Microbiology, School of Life Sciences, University of Dundee, Dow Street, Dundee, DD1 5EH, UK
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21
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Alves-Barroco C, Paquete-Ferreira J, Santos-Silva T, Fernandes AR. Singularities of Pyogenic Streptococcal Biofilms - From Formation to Health Implication. Front Microbiol 2021; 11:584947. [PMID: 33424785 PMCID: PMC7785724 DOI: 10.3389/fmicb.2020.584947] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/20/2020] [Indexed: 01/09/2023] Open
Abstract
Biofilms are generally defined as communities of cells involved in a self-produced extracellular matrix adhered to a surface. In biofilms, the bacteria are less sensitive to host defense mechanisms and antimicrobial agents, due to multiple strategies, that involve modulation of gene expression, controlled metabolic rate, intercellular communication, composition, and 3D architecture of the extracellular matrix. These factors play a key role in streptococci pathogenesis, contributing to therapy failure and promoting persistent infections. The species of the pyogenic group together with Streptococcus pneumoniae are the major pathogens belonging the genus Streptococcus, and its biofilm growth has been investigated, but insights in the genetic origin of biofilm formation are limited. This review summarizes pyogenic streptococci biofilms with details on constitution, formation, and virulence factors associated with formation.
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Affiliation(s)
- Cinthia Alves-Barroco
- UCIBIO, Departamento Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, Caparica, Portugal
| | - João Paquete-Ferreira
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, Caparica, Portugal
| | - Teresa Santos-Silva
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, Caparica, Portugal
| | - Alexandra R Fernandes
- UCIBIO, Departamento Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, Caparica, Portugal
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