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Huo S, Lyu Z, Wang X, Liu S, Chen X, Yang M, Liu Z, Yin X. Engineering mesoporous polydopamine-based potentiate STING pathway activation for advanced anti-biofilm therapy. Biomaterials 2025; 312:122739. [PMID: 39096840 DOI: 10.1016/j.biomaterials.2024.122739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 07/07/2024] [Accepted: 07/30/2024] [Indexed: 08/05/2024]
Abstract
The biofilm-induced "relatively immune-compromised zone" creates an immunosuppressive microenvironment that is a significant contributor to refractory infections in orthopedic endophytes. Consequently, the manipulation of immune cells to co-inhibit or co-activate signaling represents a crucial strategy for the management of biofilm. This study reports the incorporation of Mn2+ into mesoporous dopamine nanoparticles (Mnp) containing the stimulator of interferon genes (STING) pathway activator cGAMP (Mncp), and outer wrapping by M1-like macrophage cell membrane (m-Mncp). The cell membrane enhances the material's targeting ability for biofilm, allowing it to accumulate locally at the infectious focus. Furthermore, m-Mncp mechanically disrupts the biofilm through photothermal therapy and induces antigen exposure through photodynamic therapy-generated reactive oxygen species (ROS). Importantly, the modulation of immunosuppression and immune activation results in the augmentation of antigen-presenting cells (APCs) and the commencement of antigen presentation, thereby inducing biofilm-specific humoral immunity and memory responses. Additionally, this approach effectively suppresses the activation of myeloid-derived suppressor cells (MDSCs) while simultaneously boosting the activity of T cells. Our study showcases the efficacy of utilizing m-Mncp immunotherapy in conjunction with photothermal and photodynamic therapy to effectively mitigate residual and recurrent infections following the extraction of infected implants. As such, this research presents a viable alternative to traditional antibiotic treatments for biofilm that are challenging to manage.
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Affiliation(s)
- Shicheng Huo
- Department of Orthopedic Surgery, Spine Center, Changzheng Hospital, Navy Medical University, Shanghai, China
| | - Zhuocheng Lyu
- Department of Bone and Joint Surgery, Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Xiaoyuan Wang
- Physical Examination Center, Xi'an International Medical Center Hospital, Xi'an, China
| | - Shichang Liu
- Department of Spine Surgery, Hong Hui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Xuxu Chen
- Department of Sports Medicine, Hong Hui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Ming Yang
- Department of Spine Surgery, Hong Hui Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Zhongkai Liu
- Department of Spine Surgery, Hong Hui Hospital, Xi'an Jiaotong University, Xi'an, China.
| | - Xinhua Yin
- Department of Spine Surgery, Hong Hui Hospital, Xi'an Jiaotong University, Xi'an, China.
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2
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Burke Ó, Zeden MS, O'Gara JP. The pathogenicity and virulence of the opportunistic pathogen Staphylococcus epidermidis. Virulence 2024; 15:2359483. [PMID: 38868991 DOI: 10.1080/21505594.2024.2359483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 05/19/2024] [Indexed: 06/14/2024] Open
Abstract
The pervasive presence of Staphylococcus epidermidis and other coagulase-negative staphylococci on the skin and mucous membranes has long underpinned a casual disregard for the infection risk that these organisms pose to vulnerable patients in healthcare settings. Prior to the recognition of biofilm as an important virulence determinant in S. epidermidis, isolation of this microorganism in diagnostic specimens was often overlooked as clinically insignificant with potential delays in diagnosis and onset of appropriate treatment, contributing to the establishment of chronic infection and increased morbidity or mortality. While impressive progress has been made in our understanding of biofilm mechanisms in this important opportunistic pathogen, research into other virulence determinants has lagged S. aureus. In this review, the broader virulence potential of S. epidermidis including biofilm, toxins, proteases, immune evasion strategies and antibiotic resistance mechanisms is surveyed, together with current and future approaches for improved therapeutic interventions.
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Affiliation(s)
- Órla Burke
- Microbiology, School of Biological and Chemical Sciences, University of Galway, Galway, Ireland
| | | | - James P O'Gara
- Microbiology, School of Biological and Chemical Sciences, University of Galway, Galway, Ireland
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3
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García-Patiño MG, Marcial-Medina MC, Ruiz-Medina BE, Licona-Limón P. IL-17 in skin infections and homeostasis. Clin Immunol 2024; 267:110352. [PMID: 39218195 DOI: 10.1016/j.clim.2024.110352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 08/13/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024]
Abstract
Interleukin (IL) 17 is a proinflammatory cytokine belonging to a structurally related group of cytokines known as the IL-17 family. It has been profoundly studied for its contribution to the pathology of autoimmune diseases. However, it also plays an important role in homeostasis and the defense against extracellular bacteria and fungi. IL-17 is important for epithelial barriers, including the skin, where some of its cellular targets reside. Most of the research work on IL-17 has focused on its effects in the skin within the context of autoimmune diseases or sterile inflammation, despite also having impact on other skin conditions. In recent years, studies on the role of IL-17 in the defense against skin pathogens and in the maintenance of skin homeostasis mediated by the microbiota have grown in importance. Here we review and discuss the cumulative evidence regarding the main contribution of IL-17 in the maintenance of skin integrity as well as its protective or pathogenic effects during some skin infections.
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Affiliation(s)
- M G García-Patiño
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - M C Marcial-Medina
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - B E Ruiz-Medina
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - P Licona-Limón
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico.
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4
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Su Z, Xu D, Hu X, Zhu W, Kong L, Qian Z, Mei J, Ma R, Shang X, Fan W, Zhu C. Biodegradable oxygen-evolving metalloantibiotics for spatiotemporal sono-metalloimmunotherapy against orthopaedic biofilm infections. Nat Commun 2024; 15:8058. [PMID: 39277594 PMCID: PMC11401848 DOI: 10.1038/s41467-024-52489-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 09/10/2024] [Indexed: 09/17/2024] Open
Abstract
Pathogen-host competition for manganese and intricate immunostimulatory pathways severely attenuates the efficacy of antibacterial immunotherapy against biofilm infections associated with orthopaedic implants. Herein, we introduce a spatiotemporal sono-metalloimmunotherapy (SMIT) strategy aimed at efficient biofilm ablation by custom design of ingenious biomimetic metal-organic framework (PCN-224)-coated MnO2-hydrangea nanoparticles (MnPM) as a metalloantibiotic. Upon reaching the acidic H2O2-enriched biofilm microenvironment, MnPM can convert abundant H2O2 into oxygen, which is conducive to significantly enhancing the efficacy of ultrasound (US)-triggered sonodynamic therapy (SDT), thereby exposing bacteria-associated antigens (BAAs). Moreover, MnPM disrupts bacterial homeostasis, further killing more bacteria. Then, the Mn ions released from the degraded MnO2 can recharge immune cells to enhance the cGAS-STING signaling pathway sensing of BAAs, further boosting the immune response and suppressing biofilm growth via biofilm-specific T cell responses. Following US withdrawal, the sustained oxygenation promotes the survival and migration of fibroblasts, stimulates the expression of angiogenic growth factors and angiogenesis, and neutralizes excessive inflammation. Our findings highlight that MnPM may act as an immune costimulatory metalloantibiotic to regulate the cGAS-STING signaling pathway, presenting a promising alternative to antibiotics for orthopaedic biofilm infection treatment and pro-tissue repair.
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Affiliation(s)
- Zheng Su
- Department of Orthopedics, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China.
| | - Dongdong Xu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450000, PR China
| | - Xianli Hu
- Department of Orthopedics, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Wanbo Zhu
- Department of Orthopaedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, 200233, PR China.
| | - Lingtong Kong
- Department of Orthopedics, Changhai Hospital of Shanghai, Shanghai, 200433, China
| | - Zhengzheng Qian
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Advanced Pharmaceuticals and Biomaterials, China Pharmaceutical University, Nanjing, 211198, China
| | - Jiawei Mei
- Department of Orthopedics, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Ruixiang Ma
- Department of Orthopedics, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Xifu Shang
- Department of Orthopedics, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China
| | - Wenpei Fan
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Advanced Pharmaceuticals and Biomaterials, China Pharmaceutical University, Nanjing, 211198, China.
| | - Chen Zhu
- Department of Orthopedics, Centre for Leading Medicine and Advanced Technologies of IHM, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230001, China.
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5
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Song EH, Garcia J, Xiong N. Dysbiosis-activated IL-17-producing T cells promote skin immunopathological progression in mice deficient of the Notch ligand Jag1 in keratinocytes. J Dermatol Sci 2024:S0923-1811(24)00189-0. [PMID: 39304389 DOI: 10.1016/j.jdermsci.2024.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
BACKGROUND The Notch signaling pathway is an evolutionarily conserved regulatory cascade critical in skin development and homeostasis. Mice deficient of Notch signaling molecules have impaired skin and hair follicle development associated with local tissue inflammation. However, mechanisms underlying skin inflammation and pathology resulting from defective Notch signals are not well understood. OBJECTIVE To dissect molecular and cellular mechanisms underlying development of skin immunopathology in mice defective of the Notch ligand Jagged-1 (Jag1). METHODS We assessed involvement of microbiota and immune cell subsets in skin pathogenic symptoms in Foxn1CreJag1fl/fl mice that were deficient of Jag1 in keratinocytes. We also used RNA-seq and 16S rRNA gene-seq analyses to identify molecular factors and bacterial species contributing to skin pathologic symptoms in Foxn1CreJag1fl/fl mice. RESULTS Compared to Jag1-sufficient littermate control mice, Foxn1CreJag1fl/fl mice had specific expansion of IL-17a-producing T cells accompanying follicular and epidermal hyperkeratosis and cyst formation while antibody blockage of IL-17a reduced the skin pathology. RNA-sequencing and 16S rRNA gene-sequencing analyses revealed dysregulated immune responses and altered microbiota compositions in the skin of Foxn1CreJag1fl/fl mice. Antibiotic treatment completely prevented over-activation of IL-17a-producing T cells and alleviated skin pathology in Foxn1CreJag1fl/fl mice. CONCLUSION Dysbiosis-induced over-activation of IL-17a-producing T cells is critically involved in development of skin pathology in Foxn1CreJag1fl/fl mice, establishing Foxn1CreJag1fl/fl mice as a useful model to study pathogenesis and therapeutic targets in microbiota-IL-17-mediated skin inflammatory diseases such as hidradenitis suppurativa (HS) and psoriasis.
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Affiliation(s)
- Eun Hyeon Song
- The Molecular, Cellular, and Integrative Biosciences (MCIBS) Graduate Program, The Pennsylvania State University, PA, USA; Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, TX, USA
| | - Juan Garcia
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, TX, USA
| | - Na Xiong
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Science Center San Antonio, TX, USA; Department of Medicine-Division of Dermatology and Cutaneous Surgery, University of Texas Health Science Center San Antonio, TX , USA.
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6
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Sampson HA. The riddle of response to cutaneous allergen exposure in patients with atopic dermatitis. Ann Allergy Asthma Immunol 2024; 133:244-251. [PMID: 38740132 DOI: 10.1016/j.anai.2024.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/16/2024]
Abstract
The skin is the largest immunologic organ in the body and contains immune cells that play a role in both food allergen sensitization and desensitization. The dual allergen exposure hypothesis posits that sensitization to food allergens may occur with cutaneous exposure on inflamed skin, eg, atopic dermatitis, but early oral consumption generally leads to tolerance. However, only one-third of children with atopic dermatitis develop a food allergy, suggesting that there is a more complex mechanism for allergen sensitization. Emerging evidence suggests that the outcome of cutaneous allergen exposure is context-dependent and largely influenced by the state of the skin barrier with healthy skin promoting natural tolerance. Current research supports the ability to induce desensitization through repeated application of allergens to the skin, known as epicutaneous immunotherapy. Preclinical research with an occlusive patch has demonstrated a significantly reduced T-helper cell type 2-driven immunologic response when applied to intact, uninflamed skin and induction of a unique population of regulatory T cells that express a broader range of homing receptors, which may be able to maintain sustained protection. In clinical studies of children aged 1 through 11 years with a peanut allergy, epicutaneous immunotherapy with an occlusive patch led to significant desensitization with no major differences in efficacy or safety between children with and without atopic dermatitis. These data begin to answer the conundrum of how allergens that are applied to the skin can lead to both sensitization and desensitization, and future studies should enable us to optimize the power of the skin as a complex immunologic organ to treat allergic, autoimmune, and autoinflammatory disorders.
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Affiliation(s)
- Hugh A Sampson
- Division of Allergy and Immunology, Department of Pediatrics, Jaffe Food Allergy Research Institute, Icahn School of Medicine at Mount Sinai, New York, New York.
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7
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Gan Y, Zhang J, Qi F, Hu Z, Sweren E, Reddy SK, Chen L, Feng X, Grice EA, Garza LA, Wang G. Commensal microbe regulation of skin cells in disease. Cell Host Microbe 2024; 32:1264-1279. [PMID: 39146798 DOI: 10.1016/j.chom.2024.07.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/17/2024]
Abstract
Human skin is the host to various commensal microbes that constitute a substantial microbial community. The reciprocal communication between these microbial inhabitants and host cells upholds both the morphological and functional attributes of the skin layers, contributing indispensably to microenvironmental and tissue homeostasis. Thus, disruption of the skin barrier or imbalances in the microbial communities can exert profound effects on the behavior of host cells. This influence, mediated by the microbes themselves or their metabolites, manifests in diverse outcomes. In this review, we examine existing knowledge to provide insight into the nuanced behavior exhibited by the microbiota on skin cells in health and disease states. These interactions provide insight into potential cellular targets for future microbiota-based therapies to prevent and treat skin disease.
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Affiliation(s)
- Yuyang Gan
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Jiarui Zhang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Fangfang Qi
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Zhiqi Hu
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Evan Sweren
- University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Sashank K Reddy
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA; Department of Plastic and Reconstructive Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Lu Chen
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Xinyi Feng
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China
| | - Elizabeth A Grice
- Department of Dermatology and Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Luis A Garza
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China; Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA; Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA.
| | - Gaofeng Wang
- Department of Plastic and Aesthetic Surgery, Nanfang Hospital of Southern Medical University, Guangzhou, Guangdong Province 510515, China; Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD 21210, USA.
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8
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Wells AC, Lima-Junior DS, Link VM, Smelkinson M, Krishnamurthy SR, Chi L, Segrist E, Rivera CA, Teijeiro A, Bouladoux N, Belkaid Y. Adaptive immunity to retroelements promotes barrier integrity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.09.606346. [PMID: 39149266 PMCID: PMC11326312 DOI: 10.1101/2024.08.09.606346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Maintenance of tissue integrity is a requirement of host survival. This mandate is of prime importance at barrier sites that are constitutively exposed to the environment. Here, we show that exposure of the skin to non-inflammatory xenobiotics promotes tissue repair; more specifically, mild detergent exposure promotes the reactivation of defined retroelements leading to the induction of retroelement-specific CD8+ T cells. These T cell responses are Langerhans cell dependent and establish tissue residency within the skin. Upon injury, retroelement-specific CD8+ T cells significantly accelerate wound repair via IL-17A. Collectively, this work demonstrates that tonic environmental exposures and associated adaptive responses to retroelements can be coopted to preemptively set the tissue for maximal resilience to injury.
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Affiliation(s)
- Alexandria C. Wells
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Djalma Souza Lima-Junior
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Verena M. Link
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Margery Smelkinson
- Biological Imaging, Research Technology Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Siddharth R. Krishnamurthy
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Liang Chi
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Elisha Segrist
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Claudia A. Rivera
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ana Teijeiro
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Nicolas Bouladoux
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yasmine Belkaid
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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Haghani NB, Lampe RH, Samuel BS, Chalasani SH, Matty MA. Identification and characterization of a skin microbiome on Caenorhabditis elegans suggests environmental microbes confer cuticle protection. Microbiol Spectr 2024; 12:e0016924. [PMID: 38980017 PMCID: PMC11302229 DOI: 10.1128/spectrum.00169-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 06/10/2024] [Indexed: 07/10/2024] Open
Abstract
In the wild, C. elegans are emersed in environments teeming with a veritable menagerie of microorganisms. The C. elegans cuticular surface serves as a barrier and first point of contact with their microbial environments. In this study, we identify microbes from C. elegans natural habitats that associate with its cuticle, constituting a simple "skin microbiome." We rear our animals on a modified CeMbio, mCeMbio, a consortium of ecologically relevant microbes. We first combine standard microbiological methods with an adapted micro skin-swabbing tool to describe the skin-resident bacteria on the C. elegans surface. Furthermore, we conduct 16S rRNA gene sequencing studies to identify relative shifts in the proportion of mCeMbio bacteria upon surface-sterilization, implying distinct skin- and gut-microbiomes. We find that some strains of bacteria, including Enterobacter sp. JUb101, are primarily found on the nematode skin, while others like Stenotrophomonas indicatrix JUb19 and Ochrobactrum vermis MYb71 are predominantly found in the animal's gut. Finally, we show that this skin microbiome promotes host cuticle integrity in harsh environments. Together, we identify a skin microbiome for the well-studied nematode model and propose its value in conferring host fitness advantages in naturalized contexts. IMPORTANCE The genetic model organism C. elegans has recently emerged as a tool for understanding host-microbiome interactions. Nearly all of these studies either focus on pathogenic or gut-resident microbes. Little is known about the existence of native, nonpathogenic skin microbes or their function. We demonstrate that members of a modified C. elegans model microbiome, mCeMbio, can adhere to the animal's cuticle and confer protection from noxious environments. We combine a novel micro-swab tool, the first 16S microbial sequencing data from relatively unperturbed C. elegans, and physiological assays to demonstrate microbially mediated protection of the skin. This work serves as a foundation to explore wild C. elegans skin microbiomes and use C. elegans as a model for skin research.
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Affiliation(s)
- Nadia B. Haghani
- Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, California, USA
- University of California San Diego, La Jolla, California, USA
| | - Robert H. Lampe
- Microbial and Environmental Genomics, J. Craig Venter Institute, La Jolla, California, USA
- Integrative Oceanography Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA
| | - Buck S. Samuel
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Sreekanth H. Chalasani
- Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, California, USA
- University of California San Diego, La Jolla, California, USA
| | - Molly A. Matty
- Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, California, USA
- Biology, University of Portland, Portland, Oregon, USA
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10
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Hu Z, Shan J, Cui Y, Cheng L, Chen XL, Wang X. Nanozyme-Incorporated Microneedles for the Treatment of Chronic Wounds. Adv Healthc Mater 2024; 13:e2400101. [PMID: 38794907 DOI: 10.1002/adhm.202400101] [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: 01/10/2024] [Revised: 03/28/2024] [Indexed: 05/26/2024]
Abstract
Acute wounds are converted to chronic wounds due to advanced age and diabetic complications. Nanozymes catalyze ROS production to kill bacteria without causing drug resistance, while microneedles (MNs) can break through the skin barrier to deliver drugs effectively. Nanozymes can be intergrateded into MNs delivery systems to improve painless drug delivery. It can also reduce the effective dose of drug sterilization while increasing delivery efficiency and effectively killing wounded bacteria while preventing drug resistance. This paper describes various types of metal nanozymes from previous studies and compares their mutual enhancement with nanozymes. The pooled results show that the MNs, through material innovation, are able to both penetrate the scab and deliver nanozymes and exert additional anti-inflammatory and bactericidal effects. The catalytic effect of some of the nanozymes can also accelerate the lysis of the MNs or create a cascade reaction against inflammation and infection. However, the issue of increased toxicity associated with skin penetration and clinical translation remains a challenge. This study reviews the latest published results and corresponding challenges associated with the use of MNs combined with nanozymes for the treatment of wounds, providing further information for future research.
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Affiliation(s)
- Zhiyuan Hu
- Department of Burns, The First Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230032, P. R. China
- School of Biomedical Engineering, Research and Engineering Center of Biomedical Materials, Anhui Medical University, Hefei, Anhui, 230032, P. R. China
| | - Jie Shan
- Department of Burns, The First Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230032, P. R. China
| | - Yuyu Cui
- Department of Burns, The First Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230032, P. R. China
| | - Liang Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Xu-Lin Chen
- Department of Burns, The First Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230032, P. R. China
| | - Xianwen Wang
- School of Biomedical Engineering, Research and Engineering Center of Biomedical Materials, Anhui Medical University, Hefei, Anhui, 230032, P. R. China
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11
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Benjamin KN, Goyal A, Nair RV, Endy D. Genome-wide transcription response of Staphylococcus epidermidis to heat shock and medically relevant glucose levels. Front Microbiol 2024; 15:1408796. [PMID: 39104585 PMCID: PMC11298487 DOI: 10.3389/fmicb.2024.1408796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 06/24/2024] [Indexed: 08/07/2024] Open
Abstract
Skin serves as both barrier and interface between body and environment. Skin microbes are intermediaries evolved to respond, transduce, or act in response to changing environmental or physiological conditions. We quantified genome-wide changes in gene expression levels for one abundant skin commensal, Staphylococcus epidermidis, in response to an internal physiological signal, glucose levels, and an external environmental signal, temperature. We found 85 of 2,354 genes change up to ~34-fold in response to medically relevant changes in glucose concentration (0-17 mM; adj p ≤0.05). We observed carbon catabolite repression in response to a range of glucose spikes, as well as upregulation of genes involved in glucose utilization in response to persistent glucose. We observed 366 differentially expressed genes in response to a physiologically relevant change in temperature (37-45°C; adj p ≤ 0.05) and an S. epidermidis heat-shock response that mostly resembles the heat-shock response of related staphylococcal species. DNA motif analysis revealed CtsR and CIRCE operator sequences arranged in tandem upstream of dnaK and groESL operons. We identified and curated 38 glucose-responsive genes as candidate ON or OFF switches for use in controlling synthetic genetic systems. Such systems might be used to instrument the in-situ skin microbiome or help control microbes bioengineered to serve as embedded diagnostics, monitoring, or treatment platforms.
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Affiliation(s)
| | - Aditi Goyal
- Biomedical Data Science, Stanford University School of Medicine, Stanford, CA, United States
| | - Ramesh V. Nair
- Stanford Center for Genomics and Personalized Medicine, Stanford University School of Medicine, Stanford, CA, United States
| | - Drew Endy
- Bioengineering, Stanford University, Stanford, CA, United States
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12
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Konkel JE, Cox JR, Wemyss K. Bite-sized immunology; damage and microbes educating immunity at the gingiva. Mucosal Immunol 2024:S1933-0219(24)00070-9. [PMID: 39038755 DOI: 10.1016/j.mucimm.2024.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/09/2024] [Accepted: 07/16/2024] [Indexed: 07/24/2024]
Abstract
Immune cells residing at the gingiva experience diverse and unique signals, tailoring their functions to enable them to appropriately respond to immunological challenges and maintain tissue integrity. The gingiva, defined as the mucosal barrier that surrounds and supports the teeth, is the only barrier site completely transected by a hard structure, the tooth. The tissue is damaged in early life during tooth eruption and chronically throughout life by the process of mastication. This occurs alongside challenges typical of barrier sites, including exposure to invading pathogens, the local commensal microbial community and environmental antigens. This review will focus on the immune network safeguarding gingival integrity, which is far less understood than that resident at other barrier sites. A detailed understanding of the gingiva-resident immune network is vital as it is the site of the inflammatory disease periodontitis, the most common chronic inflammatory condition in humans which has well-known detrimental systemic effects. Furthering our understanding of how the immune populations within the gingiva develop, are tailored in health, and how this is dysregulated in disease would further the development of effective therapies for periodontitis.
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Affiliation(s)
- Joanne E Konkel
- Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK.
| | - Joshua R Cox
- Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Kelly Wemyss
- Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
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13
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Imam MW, Luqman S. Unveiling the mechanism of essential oil action against skin pathogens: from ancient wisdom to modern science. Arch Microbiol 2024; 206:347. [PMID: 38985339 DOI: 10.1007/s00203-024-03986-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/22/2024] [Accepted: 04/28/2024] [Indexed: 07/11/2024]
Abstract
Essential oils are among the most well-known phyto-compounds, and since ancient times, they have been utilized in medicine. Over 100 essential oils have been identified and utilized as therapies for various skin infections and related ailments. While numerous commercial medicines are available in different dosage forms to treat skin diseases, the persisting issues include their side effects, toxicity, and low efficacy. As a result, researchers are seeking novel classes of compounds as substitutes for synthetic drugs, aiming for minimal side effects, no toxicity, and high efficacy. Essential oils have shown promising antimicrobial activity against skin-associated pathogens. This review presents essential knowledge and scientific information regarding essential oil's antimicrobial capabilities against microorganisms that cause skin infections. Essential oils mechanisms against different pathogens have also been explored. Many essential oils exhibit promising activity against various microbes, which has been qualitatively assessed using the agar disc diffusion experiment, followed by determining the minimum inhibitory concentration for quantitative evaluation. It has been observed that Staphylococcus aureus and Candida albicans have been extensively researched in the context of skin-related infections and their antimicrobial activity, including established modes of action. In contrast, other skin pathogens such as Staphylococcus epidermidis, Streptococcus pyogens, Propionibacterium acnes, and Malassezia furfur have received less attention or neglected. This review report provides an updated understanding of the mechanisms of action of various essential oils with antimicrobial properties. This review explores the anti-infectious activity and mode of action of essential against distinct skin pathogens. Such knowledge can be valuable in treating skin infections and related ailments.
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Affiliation(s)
- Md Waquar Imam
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201001, Uttar Pradesh, India
| | - Suaib Luqman
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226015, Uttar Pradesh, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201001, Uttar Pradesh, India.
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14
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Yu T, Xu X, Liu Y, Wang X, Wu S, Qiu Z, Liu X, Pan X, Gu C, Wang S, Dong L, Li W, Yao X. Multi-omics signatures reveal genomic and functional heterogeneity of Cutibacterium acnes in normal and diseased skin. Cell Host Microbe 2024; 32:1129-1146.e8. [PMID: 38936370 DOI: 10.1016/j.chom.2024.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/19/2024] [Accepted: 06/03/2024] [Indexed: 06/29/2024]
Abstract
Cutibacterium acnes is the most abundant bacterium of the human skin microbiome since adolescence, participating in both skin homeostasis and diseases. Here, we demonstrate individual and niche heterogeneity of C. acnes from 1,234 isolate genomes. Skin disease (atopic dermatitis and acne) and body site shape genomic differences of C. acnes, stemming from horizontal gene transfer and selection pressure. C. acnes harbors characteristic metabolic functions, fewer antibiotic resistance genes and virulence factors, and a more stable genome compared with Staphylococcus epidermidis. Integrated genome, transcriptome, and metabolome analysis at the strain level unveils the functional characteristics of C. acnes. Consistent with the transcriptome signature, C. acnes in a sebum-rich environment induces toxic and pro-inflammatory effects on keratinocytes. L-carnosine, an anti-oxidative stress metabolite, is up-regulated in the C. acnes metabolome from atopic dermatitis and attenuates skin inflammation. Collectively, our study reveals the joint impact of genes and the microenvironment on C. acnes function.
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Affiliation(s)
- Tianze Yu
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xiaoqiang Xu
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yang Liu
- 01life Institute, Shenzhen 518000, China
| | - Xiaokai Wang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
| | - Shi Wu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Zhuoqiong Qiu
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Xiaochun Liu
- Department of Allergy and Rheumatology, Hospital for Skin Diseases, Institute of Dermatology, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China
| | - Xiaoyu Pan
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Chaoying Gu
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Shangshang Wang
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Lixin Dong
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China.
| | - Wei Li
- Department of Dermatology, Shanghai Institute of Dermatology, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Xu Yao
- Department of Allergy and Rheumatology, Hospital for Skin Diseases, Institute of Dermatology, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China.
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15
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Nong Y, Walsh DM, Maloh J, Dadlani M, Sivamani R. Whole-Genome Shotgun Metagenomic Sequencing Reveals Shifts in the Skin Microbiome and Bacteriophages of Psoriasis: An Extended Analysis of Published Data. JOURNAL OF PSORIASIS AND PSORIATIC ARTHRITIS 2024; 9:98-107. [PMID: 39301212 PMCID: PMC11361494 DOI: 10.1177/24755303241242357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
Background Psoriasis is an immune-mediated cutaneous disease that may have shifts in the skin microbiome. Prior research on the skin microbiome in psoriasis has been limited to rRNA based approaches that lack resolution of taxonomic and functional level assessment. Objective To further illuminate strain and sub-strain level analysis of psoriatic lesions using the CosmosID-HUB Microbiome pipeline. Methods A previous study completed by Tett et al recruited patients with psoriasis who had skin microbiome samples taken from psoriatic plaques on the ear and the elbow as well as sites on the skin unaffected by psoriasis. They performed whole genome shotgun sequencing and made their dataset publicly available. We analyzed the dataset using the CosmosID-HUB Microbiome pipeline to evaluate the strain and sub-strain taxonomic analysis as well as functional gene profiling. Results When analyzed with the CosmosID pipeline, both ear and elbow sites in affected areas had decreased alpha diversity compared to unaffected areas. There was an increased relative abundance of Staphylococcus and Corynebacteria at affected sites. We identified distinguishing species and strains of the yeast Malassezia, including M. restricta. that were significantly enriched in healthy elbow samples. Vitamin B12 production genes were not present in psoriatic skin whereas it was present in healthy samples, supporting the notion of relative vitamin B12 deficiency in psoriatic plaques. Phage analysis revealed a greater diversity of Staphylococcus-related phages in unaffected elbow samples. Conclusion A greater diversity of microbial strains and their functional roles identified in this study may help to tailor treatment for psoriasis.
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Affiliation(s)
- Yvonne Nong
- SUNY Downstate Medical Center, Brooklyn, NY, USA
- Integrative Skin Science and Research, Sacramento, CA, USA
- Pacific Skin Institute, Sacramento, CA, USA
- Department of Dermatology, University of California-Davis, Sacramento, CA, USA
| | | | - Jessica Maloh
- Integrative Skin Science and Research, Sacramento, CA, USA
| | | | - Raja Sivamani
- Integrative Skin Science and Research, Sacramento, CA, USA
- Pacific Skin Institute, Sacramento, CA, USA
- Department of Dermatology, University of California-Davis, Sacramento, CA, USA
- College of Medicine, California Northstate University, Elk Grove, CA, USA
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16
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Zhang W, Peng Q, Huang X, Huang Q, Zhang Z, Li F, Zheng N, Shi B, Fan Z, Maj T, Chen R. Commensal microbiome dysbiosis elicits interleukin-8 signaling to drive fibrotic skin disease. PNAS NEXUS 2024; 3:pgae273. [PMID: 39081787 PMCID: PMC11287872 DOI: 10.1093/pnasnexus/pgae273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 06/22/2024] [Indexed: 08/02/2024]
Abstract
Wound healing is an intensely studied topic involved in many relevant pathophysiological processes, including fibrosis. Despite the large interest in fibrosis, the network that is related to commensal microbiota and skin fibrosis remains mysterious. Here, we pay attention to keloid, a classical yet intractable skin fibrotic disease to establish the association between commensal microbiota to scaring tissue. Our histological data reveal the presence of microbiota in the keloids. 16S rRNA sequencing characterizes microbial composition and divergence between the pathological and normal skin tissues. Moreover, the data show elevation of interleukin-8 (IL-8) in both the circulation and keloid tissue, which elicited the collagen accumulation and migratory program of dermal fibroblasts via CXCR1/2 receptor. Our research provides insights into the pathology of human fibrotic diseases, advocating commensal bacteria and IL-8 signaling as useful targets in future interventions of recurrent keloid disease.
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Affiliation(s)
- Wenyu Zhang
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Qili Peng
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Xian Huang
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Qing Huang
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Zhiliang Zhang
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Renji Ningbo Hangzhou Bay Hospital, School of Medicine, Shanghai Jiao Tong University, Binhai Second Road 1155, Ningbo 315600, China
| | - Fuli Li
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Naisheng Zheng
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Binsheng Shi
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Zhihong Fan
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Renji Ningbo Hangzhou Bay Hospital, School of Medicine, Shanghai Jiao Tong University, Binhai Second Road 1155, Ningbo 315600, China
| | - Tomasz Maj
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
| | - Rui Chen
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Pujian Road 160, Shanghai 200240, China
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17
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White EK, Uberoi A, Pan JTC, Ort JT, Campbell AE, Murga-Garrido SM, Harris JC, Bhanap P, Wei M, Robles NY, Gardner SE, Grice EA. Alcaligenes faecalis corrects aberrant matrix metalloproteinase expression to promote reepithelialization of diabetic wounds. SCIENCE ADVANCES 2024; 10:eadj2020. [PMID: 38924411 PMCID: PMC11204295 DOI: 10.1126/sciadv.adj2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 05/20/2024] [Indexed: 06/28/2024]
Abstract
Chronic wounds are a common and costly complication of diabetes, where multifactorial defects contribute to dysregulated skin repair, inflammation, tissue damage, and infection. We previously showed that aspects of the diabetic foot ulcer microbiota were correlated with poor healing outcomes, but many microbial species recovered remain uninvestigated with respect to wound healing. Here, we focused on Alcaligenes faecalis, a Gram-negative bacterium that is frequently recovered from chronic wounds but rarely causes infection. Treatment of diabetic wounds with A. faecalis accelerated healing during early stages. We investigated the underlying mechanisms and found that A. faecalis treatment promotes reepithelialization of diabetic keratinocytes, a process that is necessary for healing but deficient in chronic wounds. Overexpression of matrix metalloproteinases in diabetes contributes to failed epithelialization, and we found that A. faecalis treatment balances this overexpression to allow proper healing. This work uncovers a mechanism of bacterial-driven wound repair and provides a foundation for the development of microbiota-based wound interventions.
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Affiliation(s)
- Ellen K. White
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Aayushi Uberoi
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jamie Ting-Chun Pan
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jordan T. Ort
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Amy E. Campbell
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sofia M. Murga-Garrido
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jordan C. Harris
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Preeti Bhanap
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Monica Wei
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nelida Y. Robles
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sue E. Gardner
- College of Nursing, The University of Iowa, Iowa City, IA 52242, USA
| | - Elizabeth A. Grice
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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18
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Ray A, Hu KH, Kersten K, Courau T, Kuhn NF, Zaleta-Linares I, Samad B, Combes AJ, Krummel MF. Critical role of CD206+ macrophages in promoting a cDC1-NK-CD8 T cell anti-tumor immune axis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.10.31.560822. [PMID: 37961697 PMCID: PMC10635006 DOI: 10.1101/2023.10.31.560822] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Tumor-associated macrophages (TAMs) are frequently categorized as being 'M1' or 'M2' polarized, even as substantial data challenges this binary modeling of macrophage cell state. One molecule consistently referenced as a delineator of a putative immunosuppressive 'M2' state is the surface protein CD206. We thus made a novel conditional CD206 (Mrc1) knock-in mouse to specifically visualize and/or deplete CD206+ 'M2-like' TAMs and assess their correspondence with pro-tumoral immunity. Early, but not late depletion of CD206+ macrophages and monocytes (here, 'Mono/Macs') led to an indirect loss of a key anti-tumor network of NK cells, conventional type I dendritic cells (cDC1) and CD8 T cells. Among myeloid cells, we found that the CD206+ TAMs are the primary producers of CXCL9, and able to differentially attract activated CD8 T cells. In contrast, a population of stress-responsive TAMs ("Hypoxic" or Spp1+) and immature monocytes, which lack CD206 expression and become prominent following early depletion, expressed markedly diminished levels of CXCL9. Those NK and CD8 T cells which enter CD206-depleted tumors express vastly reduced levels of the corresponding receptor Cxcr3, the cDC1-attracting chemokine Xcl1 and cDC1 growth factor Flt3l transcripts. Consistent with the loss of this critical network, early CD206+ TAM depletion decreased tumor control by antigen specific CD8 T cells in mice. Likewise, in humans, the CD206Replete, but not the CD206Depleted Mono/Mac gene signature correlated robustly with CD8 T cell, NK cell and stimulatory cDC1 gene signatures and transcriptomic signatures skewed towards CD206Replete Mono/Macs associated with better survival. Together, these findings negate the unqualified classification of CD206+ 'M2-like' macrophages as immunosuppressive by illuminating contexts for their role in organizing a critical tumor-reactive archetype of immunity.
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Affiliation(s)
- Arja Ray
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
| | - Kenneth H. Hu
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
| | - Kelly Kersten
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
| | - Tristan Courau
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
| | - Nicholas F. Kuhn
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
| | - Itzia Zaleta-Linares
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
| | - Bushra Samad
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
- UCSF CoLabs, University of California, San Francisco, CA 94143, USA
| | - Alexis J. Combes
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
- UCSF CoLabs, University of California, San Francisco, CA 94143, USA
- Department of Medicine, University of California, San Francisco, CA 94143, USA
| | - Matthew F. Krummel
- Department of Pathology, University of California, San Francisco, CA 94143, USA
- ImmunoX Initiative, University of California, San Francisco, CA 94143, USA
- UCSF CoLabs, University of California, San Francisco, CA 94143, USA
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19
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Wan B, Chen G, Poon ESK, Fung HS, Lau A, Sin SYW. Environmental factors and host sex influence the skin microbiota structure of Hong Kong newt (Paramesotriton hongkongensis) in a coldspot of chytridiomycosis in subtropical East Asia. Integr Zool 2024. [PMID: 38872359 DOI: 10.1111/1749-4877.12855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Chytridiomycosis, an infectious skin disease caused by the chytrid fungi, Batrachochytrium dendrobatidis and B. salamandrivorans, poses a significant threat to amphibian biodiversity worldwide. Antifungal bacteria found on the skin of chytrid-resistant amphibians could potentially provide defense against chytridiomycosis and lower mortality rates among resistant individuals. The Hong Kong newt (Paramesotriton hongkongensis) is native to East Asia, a region suspected to be the origin of chytrids, and has exhibited asymptomatic infection, suggesting a long-term coexistence with the chytrids. Therefore, the skin microbiota of this resistant species warrant investigation, along with other factors that can affect the microbiota. Among the 149 newts sampled in their natural habitats in Hong Kong, China, putative antifungal bacteria were found in all individuals. There were 314 amplicon sequence variants distributed over 25 genera of putative antifungal bacteria; abundant ones included Acinetobacter, Flavobacterium, and Novosphingobium spp. The skin microbiota compositions were strongly influenced by the inter-site geographical distances. Despite inter-site differences, we identified some core skin microbes across sites that could be vital to P. hongkongensis. The dominant cores included the family Comamonadaceae, family Chitinophagaceae, and class Betaproteobacteria. Moreover, habitat elevation and host sex also exhibited significant effects on skin microbiota compositions. The antifungal bacteria found on these newts offer an important resource for conservation against chytridiomycosis, such as developing probiotic treatments for susceptible species.
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Affiliation(s)
- Bowen Wan
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Guoling Chen
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Emily Shui Kei Poon
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Hon Shing Fung
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Anthony Lau
- Science Unit, Lingnan University, Hong Kong, China
| | - Simon Yung Wa Sin
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
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20
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Piewngam P, Otto M. Staphylococcus aureus colonisation and strategies for decolonisation. THE LANCET. MICROBE 2024; 5:e606-e618. [PMID: 38518792 PMCID: PMC11162333 DOI: 10.1016/s2666-5247(24)00040-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 03/24/2024]
Abstract
Staphylococcus aureus is a leading cause of death by infectious diseases worldwide. Treatment of S aureus infections is difficult due to widespread antibiotic resistance, necessitating alternative approaches and measures for prevention of infection. Because S aureus infections commonly arise from asymptomatic colonisation, decolonisation is considered a key approach for their prevention. Current decolonisation procedures include antibiotic-based and antiseptic-based eradication of S aureus from the nose and skin. However, despite the widespread implementation and partial success of such measures, S aureus infection rates remain worrisome, and resistance to decolonisation agents is on the rise. In this Review we outline the epidemiology and mechanisms of S aureus colonisation, describe how colonisation underlies infection, and discuss current and novel approaches for S aureus decolonisation, with a focus on the latest findings on probiotic strategies and the intestinal S aureus colonisation site.
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Affiliation(s)
- Pipat Piewngam
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, MD, USA
| | - Michael Otto
- Pathogen Molecular Genetics Section, Laboratory of Bacteriology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, MD, USA.
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21
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Johnston LA, Nagalla RR, Li M, Whitley SK. IL-17 Control of Cutaneous Immune Homeostasis. J Invest Dermatol 2024; 144:1208-1216. [PMID: 38678465 DOI: 10.1016/j.jid.2023.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 11/10/2023] [Accepted: 11/23/2023] [Indexed: 05/01/2024]
Abstract
IL-17 is widely recognized for its roles in host defense and inflammatory disorders. However, it has become clear that IL-17 is also an essential regulator of barrier tissue physiology. Steady-state microbe sensing at the skin surface induces low-level IL-17 expression that enhances epithelial integrity and resists pathogens without causing overt inflammation. Recent reports describe novel protective roles for IL-17 in wound healing and counteracting physiologic stress; however, chronic amplification of these beneficial responses contributes to skin pathologies as diverse as fibrosis, cancer, and autoinflammation. In this paper, we discuss the context-specific roles of IL-17 in skin health and disease and therapeutic opportunities.
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Affiliation(s)
- Leah A Johnston
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Raji R Nagalla
- Medical Scientist Training Program, School of Medicine, University of California, Irvine, Irvine, California, USA
| | - Mushi Li
- Department of Dermatology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Sarah K Whitley
- Department of Dermatology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA; Autoimmune Therapeutics Institute, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA; NeuroNexus Institute, University of Massachusetts Chan Medical School, Worcester, Massachusettes, USA.
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22
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Rook GAW. Evolution and the critical role of the microbiota in the reduced mental and physical health associated with low socioeconomic status (SES). Neurosci Biobehav Rev 2024; 161:105653. [PMID: 38582194 DOI: 10.1016/j.neubiorev.2024.105653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
The evolution of the gut-microbiota-brain axis in animals reveals that microbial inputs influence metabolism, the regulation of inflammation and the development of organs, including the brain. Inflammatory, neurodegenerative and psychiatric disorders are more prevalent in people of low socioeconomic status (SES). Many aspects of low SES reduce exposure to the microbial inputs on which we are in a state of evolved dependence, whereas the lifestyle of wealthy citizens maintains these exposures. This partially explains the health deficit of low SES, so focussing on our evolutionary history and on environmental and lifestyle factors that distort microbial exposures might help to mitigate that deficit. But the human microbiota is complex and we have poor understanding of its functions at the microbial and mechanistic levels, and in the brain. Perhaps its composition is more flexible than the microbiota of animals that have restricted habitats and less diverse diets? These uncertainties are discussed in relation to the encouraging but frustrating results of attempts to treat psychiatric disorders by modulating the microbiota.
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Affiliation(s)
- Graham A W Rook
- Centre for Clinical Microbiology, Department of infection, UCL (University College London), London, UK.
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23
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Bittner-Eddy PD, Fischer LA, Parachuru PV, Costalonga M. MHC-II presentation by oral Langerhans cells impacts intraepithelial Tc17 abundance and Candida albicans oral infection via CD4 T cells. FRONTIERS IN ORAL HEALTH 2024; 5:1408255. [PMID: 38872986 PMCID: PMC11169704 DOI: 10.3389/froh.2024.1408255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 05/13/2024] [Indexed: 06/15/2024] Open
Abstract
In a murine model (LCΔMHC-II) designed to abolish MHC-II expression in Langerhans cells (LCs), ∼18% of oral LCs retain MHC-II, yet oral mucosal CD4 T cells numbers are unaffected. In LCΔMHC-II mice, we now show that oral intraepithelial conventional CD8αβ T cell numbers expand 30-fold. Antibody-mediated ablation of CD4 T cells in wild-type mice also resulted in CD8αβ T cell expansion in the oral mucosa. Therefore, we hypothesize that MHC class II molecules uniquely expressed on Langerhans cells mediate the suppression of intraepithelial resident-memory CD8 T cell numbers via a CD4 T cell-dependent mechanism. The expanded oral CD8 T cells co-expressed CD69 and CD103 and the majority produced IL-17A [CD8 T cytotoxic (Tc)17 cells] with a minority expressing IFN-γ (Tc1 cells). These oral CD8 T cells showed broad T cell receptor Vβ gene usage indicating responsiveness to diverse oral antigens. Generally supporting Tc17 cells, transforming growth factor-β1 (TGF-β1) increased 4-fold in the oral mucosa. Surprisingly, blocking TGF-β1 signaling with the TGF-R1 kinase inhibitor, LY364947, did not reduce Tc17 or Tc1 numbers. Nonetheless, LY364947 increased γδ T cell numbers and decreased CD49a expression on Tc1 cells. Although IL-17A-expressing γδ T cells were reduced by 30%, LCΔMHC-II mice displayed greater resistance to Candida albicans in early stages of oral infection. These findings suggest that modulating MHC-II expression in oral LC may be an effective strategy against fungal infections at mucosal surfaces counteracted by IL-17A-dependent mechanisms.
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Affiliation(s)
- Peter D. Bittner-Eddy
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN, United States
| | - Lori A. Fischer
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN, United States
| | - Praveen Venkata Parachuru
- Division of Periodontology, Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN, United States
| | - Massimo Costalonga
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN, United States
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24
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Narros-Fernández P, Chomanahalli Basavarajappa S, Walsh PT. Interleukin-1 family cytokines at the crossroads of microbiome regulation in barrier health and disease. FEBS J 2024; 291:1849-1869. [PMID: 37300849 DOI: 10.1111/febs.16888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/23/2023] [Accepted: 06/08/2023] [Indexed: 06/12/2023]
Abstract
Recent advances in understanding how the microbiome can influence both the physiology and the pathogenesis of disease in humans have highlighted the importance of gaining a deeper insight into the complexities of the host-microbial dialogue. In tandem with this progress, has been a greater understanding of the biological pathways which regulate both homeostasis and inflammation at barrier tissue sites, such as the skin and the gut. In this regard, the Interleukin-1 family of cytokines, which can be segregated into IL-1, IL-18 and IL-36 subfamilies, have emerged as important custodians of barrier health and immunity. With established roles as orchestrators of various inflammatory diseases in both the skin and intestine, it is now becoming clear that IL-1 family cytokine activity is not only directly influenced by external microbes, but can also play important roles in shaping the composition of the microbiome at barrier sites. This review explores the current knowledge surrounding the evidence that places these cytokines as key mediators at the interface between the microbiome and human health and disease at the skin and intestinal barrier tissues.
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Affiliation(s)
- Paloma Narros-Fernández
- Trinity Translational Medicine Institute, School of Medicine, Trinity College Dublin, Ireland
- National Children's Research Centre, CHI Crumlin, Dublin 12, Ireland
| | - Shrikanth Chomanahalli Basavarajappa
- Trinity Translational Medicine Institute, School of Medicine, Trinity College Dublin, Ireland
- National Children's Research Centre, CHI Crumlin, Dublin 12, Ireland
| | - Patrick T Walsh
- Trinity Translational Medicine Institute, School of Medicine, Trinity College Dublin, Ireland
- National Children's Research Centre, CHI Crumlin, Dublin 12, Ireland
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25
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Amorim Sacramento L, Farias Amorim C, G. Lombana C, Beiting D, Novais F, P. Carvalho L, M. Carvalho E, Scott P. CCR5 promotes the migration of pathological CD8+ T cells to the leishmanial lesions. PLoS Pathog 2024; 20:e1012211. [PMID: 38709823 PMCID: PMC11098486 DOI: 10.1371/journal.ppat.1012211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 05/16/2024] [Accepted: 04/22/2024] [Indexed: 05/08/2024] Open
Abstract
Cytolytic CD8+ T cells mediate immunopathology in cutaneous leishmaniasis without controlling parasites. Here, we identify factors involved in CD8+ T cell migration to the lesion that could be targeted to ameliorate disease severity. CCR5 was the most highly expressed chemokine receptor in patient lesions, and the high expression of CCL3 and CCL4, CCR5 ligands, was associated with delayed healing of lesions. To test the requirement for CCR5, Leishmania-infected Rag1-/- mice were reconstituted with CCR5-/- CD8+ T cells. We found that these mice developed smaller lesions accompanied by a reduction in CD8+ T cell numbers compared to controls. We confirmed these findings by showing that the inhibition of CCR5 with maraviroc, a selective inhibitor of CCR5, reduced lesion development without affecting the parasite burden. Together, these results reveal that CD8+ T cells migrate to leishmanial lesions in a CCR5-dependent manner and that blocking CCR5 prevents CD8+ T cell-mediated pathology.
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Affiliation(s)
- Laís Amorim Sacramento
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Camila Farias Amorim
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Claudia G. Lombana
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Daniel Beiting
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Fernanda Novais
- Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Lucas P. Carvalho
- Laboratório de Pesquisas Clínicas do Instituto de Pesquisas Gonçalo Muniz–Fiocruz, Salvador, Bahia, Brazil
- Immunology Service, Professor Edgard Santos University Hospital Complex, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Edgar M. Carvalho
- Laboratório de Pesquisas Clínicas do Instituto de Pesquisas Gonçalo Muniz–Fiocruz, Salvador, Bahia, Brazil
- Immunology Service, Professor Edgard Santos University Hospital Complex, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Phillip Scott
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
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26
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Daccache JA, Naik S. Inflammatory Memory in Chronic Skin Disease. JID INNOVATIONS 2024; 4:100277. [PMID: 38708420 PMCID: PMC11068922 DOI: 10.1016/j.xjidi.2024.100277] [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: 01/03/2024] [Revised: 03/01/2024] [Accepted: 03/11/2024] [Indexed: 05/07/2024] Open
Abstract
Inflammation is a hallmark of remitting-relapsing dermatological diseases. Although a large emphasis has been placed on adaptive immune cells as mediators of relapse, evidence in epithelial and innate immune biology suggests that disease memory is widespread. In this study, we bring to the fore the concept of inflammatory memory or nonspecific training of long-lived cells in the skin, highlighting the epigenetic and other mechanisms that propagate memory at the cellular level. We place these findings in the context of psoriasis, a prototypic flaring disease known to have localized memory, and underscore the importance of targeting memory to limit disease flares.
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Affiliation(s)
| | - Shruti Naik
- Department of Pathology, NYU Langone Health, New York, New York, USA
- Ronald O. Perelman Department of Dermatology, NYU Langone Health, New York, New York, USA
- Department of Medicine, NYU Langone Health, New York, New York, USA
- Perlmutter Cancer Center, NYU Langone Health, New York, New York, USA
- Colton Center for Autoimmunity, NYU Langone Health, New York, New York, USA
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27
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Chi L, Liu C, Gribonika I, Gschwend J, Corral D, Han SJ, Lim AI, Rivera CA, Link VM, Wells AC, Bouladoux N, Collins N, Lima-Junior DS, Enamorado M, Rehermann B, Laffont S, Guéry JC, Tussiwand R, Schneider C, Belkaid Y. Sexual dimorphism in skin immunity is mediated by an androgen-ILC2-dendritic cell axis. Science 2024; 384:eadk6200. [PMID: 38574174 DOI: 10.1126/science.adk6200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 02/26/2024] [Indexed: 04/06/2024]
Abstract
Males and females exhibit profound differences in immune responses and disease susceptibility. However, the factors responsible for sex differences in tissue immunity remain poorly understood. Here, we uncovered a dominant role for type 2 innate lymphoid cells (ILC2s) in shaping sexual immune dimorphism within the skin. Mechanistically, negative regulation of ILC2s by androgens leads to a reduction in dendritic cell accumulation and activation in males, along with reduced tissue immunity. Collectively, our results reveal a role for the androgen-ILC2-dendritic cell axis in controlling sexual immune dimorphism. Moreover, this work proposes that tissue immune set points are defined by the dual action of sex hormones and the microbiota, with sex hormones controlling the strength of local immunity and microbiota calibrating its tone.
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Affiliation(s)
- Liang Chi
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Can Liu
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Inta Gribonika
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Julia Gschwend
- Institute of Physiology, University of Zurich, CH-8057 Zürich, Switzerland
| | - Dan Corral
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Seong-Ji Han
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ai Ing Lim
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Claudia A Rivera
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Verena M Link
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Alexandria C Wells
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Nicolas Bouladoux
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Nicholas Collins
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Djalma S Lima-Junior
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Michel Enamorado
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Barbara Rehermann
- Immunology Section, Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Sophie Laffont
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), INSERM UMR1291, CNRS UMR5051, University Toulouse III, Toulouse, France
| | - Jean-Charles Guéry
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), INSERM UMR1291, CNRS UMR5051, University Toulouse III, Toulouse, France
| | - Roxane Tussiwand
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | | | - Yasmine Belkaid
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
- NIAID Microbiome Program, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
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28
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Puttur F, Lloyd CM. Sex differences in tissue immunity. Science 2024; 384:159-160. [PMID: 38574173 DOI: 10.1126/science.ado8542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Androgen signaling skews skin immunity toward reduced inflammation in male mice.
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Affiliation(s)
- Franz Puttur
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Clare M Lloyd
- National Heart and Lung Institute, Imperial College London, London, UK
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29
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Khadka VD, Markey L, Boucher M, Lieberman TD. Commensal skin bacteria exacerbate inflammation and delay skin barrier repair. J Invest Dermatol 2024:S0022-202X(24)00277-X. [PMID: 38604402 DOI: 10.1016/j.jid.2024.03.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/04/2024] [Accepted: 03/16/2024] [Indexed: 04/13/2024]
Abstract
The skin microbiome can both trigger beneficial immune stimulation and pose a potential infection threat. Previous studies have shown that colonization of mouse skin with the model human skin commensal Staphylococcus epidermidis is protective against subsequent excisional wound or pathogen challenge. However, less is known about concurrent skin damage and exposure to commensal microbes, despite growing interest in interventional probiotic therapy. Here, we address this open question by applying commensal skin bacteria at a high dose to abraded skin. While depletion of the skin microbiome via antibiotics delayed repair from damage, probiotic-like application of commensals-- including the mouse commensal Staphylococcus xylosus, three distinct isolates of S. epidermidis, and all other tested human skin commensals-- also significantly delayed barrier repair. Increased inflammation was observed within four hours of S. epidermidis exposure and persisted through day four, at which point the skin displayed a chronic wound-like inflammatory state with increased neutrophil infiltration, increased fibroblast activity, and decreased monocyte differentiation. Transcriptomic analysis suggested that the prolonged upregulation of early canonical proliferative pathways inhibited the progression of barrier repair. These results highlight the nuanced role of members of the skin microbiome in modulating barrier integrity and indicate the need for caution in their development as probiotics.
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Affiliation(s)
- Veda D Khadka
- Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology; Cambridge, MA, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology; Cambridge, MA, United States
| | - Laura Markey
- Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology; Cambridge, MA, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology; Cambridge, MA, United States
| | - Magalie Boucher
- Division of Comparative Medicine, Massachusetts Institute of Technology; Cambridge, MA, United States
| | - Tami D Lieberman
- Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology; Cambridge, MA, United States; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology; Cambridge, MA, United States; Ragon Institute of Mass General, MIT and Harvard; Cambridge. MA, United States.
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30
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Marrella V, Nicchiotti F, Cassani B. Microbiota and Immunity during Respiratory Infections: Lung and Gut Affair. Int J Mol Sci 2024; 25:4051. [PMID: 38612860 PMCID: PMC11012346 DOI: 10.3390/ijms25074051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 04/14/2024] Open
Abstract
Bacterial and viral respiratory tract infections are the most common infectious diseases, leading to worldwide morbidity and mortality. In the past 10 years, the importance of lung microbiota emerged in the context of pulmonary diseases, although the mechanisms by which it impacts the intestinal environment have not yet been fully identified. On the contrary, gut microbial dysbiosis is associated with disease etiology or/and development in the lung. In this review, we present an overview of the lung microbiome modifications occurring during respiratory infections, namely, reduced community diversity and increased microbial burden, and of the downstream consequences on host-pathogen interaction, inflammatory signals, and cytokines production, in turn affecting the disease progression and outcome. Particularly, we focus on the role of the gut-lung bidirectional communication in shaping inflammation and immunity in this context, resuming both animal and human studies. Moreover, we discuss the challenges and possibilities related to novel microbial-based (probiotics and dietary supplementation) and microbial-targeted therapies (antibacterial monoclonal antibodies and bacteriophages), aimed to remodel the composition of resident microbial communities and restore health. Finally, we propose an outlook of some relevant questions in the field to be answered with future research, which may have translational relevance for the prevention and control of respiratory infections.
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Affiliation(s)
- Veronica Marrella
- UOS Milan Unit, Istituto di Ricerca Genetica e Biomedica (IRGB), CNR, 20138 Milan, Italy;
- IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Federico Nicchiotti
- Department of Medical Biotechnologies and Translational Medicine, Università degli Studi di Milano, 20089 Milan, Italy;
| | - Barbara Cassani
- IRCCS Humanitas Research Hospital, 20089 Milan, Italy
- Department of Medical Biotechnologies and Translational Medicine, Università degli Studi di Milano, 20089 Milan, Italy;
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31
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Yousuf B, Flint A, Weedmark K, Pagotto F, Ramirez-Arcos S. Comparative virulome analysis of four Staphylococcus epidermidis strains from human skin and platelet concentrates using whole genome sequencing. Access Microbiol 2024; 6:000780.v3. [PMID: 38737800 PMCID: PMC11083402 DOI: 10.1099/acmi.0.000780.v3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 02/29/2024] [Indexed: 05/14/2024] Open
Abstract
Staphylococcus epidermidis is one of the predominant bacterial contaminants in platelet concentrates (PCs), a blood component used to treat bleeding disorders. PCs are a unique niche that triggers biofilm formation, the main pathomechanism of S. epidermidis infections. We performed whole genome sequencing of four S. epidermidis strains isolated from skin of healthy human volunteers (AZ22 and AZ39) and contaminated PCs (ST10002 and ST11003) to unravel phylogenetic relationships and decipher virulence mechanisms compared to 24 complete S. epidermidis genomes in GenBank. AZ39 and ST11003 formed a separate unique lineage with strains 14.1 .R1 and SE95, while AZ22 formed a cluster with 1457 and ST10002 closely grouped with FDAAGOS_161. The four isolates were assigned to sequence types ST1175, ST1174, ST73 and ST16, respectively. All four genomes exhibited biofilm-associated genes ebh, ebp, sdrG, sdrH and atl. Additionally, AZ22 had sdrF and aap, whereas ST10002 had aap and icaABCDR. Notably, AZ39 possesses truncated ebh and sdrG and harbours a toxin-encoding gene. All isolates carry multiple antibiotic resistance genes conferring resistance to fosfomycin (fosB), β-lactams (blaZ) and fluoroquinolones (norA). This study reveales a unique lineage for S. epidermidis and provides insight into the genetic basis of virulence and antibiotic resistance in transfusion-associated S. epidermidis strains.
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Affiliation(s)
- Basit Yousuf
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada
| | - Annika Flint
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, Canada
| | - Kelly Weedmark
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, Canada
| | - Franco Pagotto
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada
- Bureau of Microbial Hazards, Health Products and Food Branch, Health Canada, Ottawa, Canada
| | - Sandra Ramirez-Arcos
- Medical Affairs and Innovation, Canadian Blood Services, Ottawa, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada
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32
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Hernandez-Nicols BF, Robledo-Pulido JJ, Alvarado-Navarro A. Etiopathogenesis of Psoriasis: Integration of Proposed Theories. Immunol Invest 2024; 53:348-415. [PMID: 38240030 DOI: 10.1080/08820139.2024.2302823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Psoriasis is a chronic inflammatory disease characterized by squamous and erythematous plaques on the skin and the involvement of the immune system. Global prevalence for psoriasis has been reported around 1-3% with a higher incidence in adults and similar proportions between men and women. The risk factors associated with psoriasis are both extrinsic and intrinsic, out of which a polygenic predisposition is a highlight out of the latter. Psoriasis etiology is not yet fully described, but several hypothesis have been proposed: 1) the autoimmunity hypothesis is based on the over-expression of antimicrobial peptides such as LL-37, the proteins ADAMTSL5, K17, and hsp27, or lipids synthesized by the PLA2G4D enzyme, all of which may serve as autoantigens to promote the differentiation of autoreactive lymphocytes T and unleash a chronic inflammatory response; 2) dysbiosis of skin microbiota hypothesis in psoriasis has gained relevance due to the observations of a loss of diversity and the participation of pathogenic bacteria such as Streptococcus spp. or Staphylococcus spp. the fungi Malassezia spp. or Candida spp. and the virus HPV, HCV, or HIV in psoriatic plaques; 3) the oxidative stress hypothesis, the most recent one, describes that the cell injury and the release of proinflammatory mediators and antimicrobial peptides that leads to activate of the Th1/Th17 axis observed in psoriasis is caused by a higher release of reactive oxygen species and the imbalance between oxidant and antioxidant mechanisms. This review aims to describe the mechanisms involved in the three hypotheses on the etiopathogeneses of psoriasis.
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Affiliation(s)
- Brenda Fernanda Hernandez-Nicols
- Centro de Investigación en Inmunología y Dermatología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Juan José Robledo-Pulido
- Centro de Investigación en Inmunología y Dermatología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Anabell Alvarado-Navarro
- Centro de Investigación en Inmunología y Dermatología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
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33
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Kulalert W, Wells AC, Link VM, Lim AI, Bouladoux N, Nagai M, Harrison OJ, Kamenyeva O, Kabat J, Enamorado M, Chiu IM, Belkaid Y. The neuroimmune CGRP-RAMP1 axis tunes cutaneous adaptive immunity to the microbiota. Proc Natl Acad Sci U S A 2024; 121:e2322574121. [PMID: 38451947 PMCID: PMC10945812 DOI: 10.1073/pnas.2322574121] [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: 12/27/2023] [Accepted: 01/22/2024] [Indexed: 03/09/2024] Open
Abstract
The somatosensory nervous system surveils external stimuli at barrier tissues, regulating innate immune cells under infection and inflammation. The roles of sensory neurons in controlling the adaptive immune system, and more specifically immunity to the microbiota, however, remain elusive. Here, we identified a mechanism for direct neuroimmune communication between commensal-specific T lymphocytes and somatosensory neurons mediated by the neuropeptide calcitonin gene-related peptide (CGRP) in the skin. Intravital imaging revealed that commensal-specific T cells are in close proximity to cutaneous nerve fibers in vivo. Correspondingly, we observed upregulation of the receptor for the neuropeptide CGRP, RAMP1, in CD8+ T lymphocytes induced by skin commensal colonization. The neuroimmune CGRP-RAMP1 signaling axis functions in commensal-specific T cells to constrain Type 17 responses and moderate the activation status of microbiota-reactive lymphocytes at homeostasis. As such, modulation of neuroimmune CGRP-RAMP1 signaling in commensal-specific T cells shapes the overall activation status of the skin epithelium, thereby impacting the outcome of responses to insults such as wounding. The ability of somatosensory neurons to control adaptive immunity to the microbiota via the CGRP-RAMP1 axis underscores the various layers of regulation and multisystem coordination required for optimal microbiota-reactive T cell functions under steady state and pathology.
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Affiliation(s)
- Warakorn Kulalert
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Alexandria C. Wells
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Verena M. Link
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Ai Ing Lim
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Nicolas Bouladoux
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
- National Institute of Allergy and Infectious Diseases Microbiome Program, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Motoyoshi Nagai
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Oliver J. Harrison
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Olena Kamenyeva
- Biological Imaging Section, Research Technology Branch, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Juraj Kabat
- Biological Imaging Section, Research Technology Branch, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
| | - Michel Enamorado
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
- Kimberly and Eric J. Waldman Department of Dermatology, Mark Lebwohl Center for Neuroinflammation and Sensation, Marc and Jennifer Lipschultz Precision Immunology Institute, and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY10029
| | - Isaac M. Chiu
- Department of Immunology, Harvard Medical School, Boston, MA02115
| | - Yasmine Belkaid
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
- National Institute of Allergy and Infectious Diseases Microbiome Program, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD20892
- Unite Metaorganisme, Immunology Department, Pasteur Institute, 75015 Paris, France
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Wu J, Li L, Zhang T, Lu J, Tai Z, Zhu Q, Chen Z. The epidermal lipid-microbiome loop and immunity: Important players in atopic dermatitis. J Adv Res 2024:S2090-1232(24)00088-2. [PMID: 38460775 DOI: 10.1016/j.jare.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 02/10/2024] [Accepted: 03/04/2024] [Indexed: 03/11/2024] Open
Abstract
BACKGROUND The promotion of epidermal barrier dysfunction is attributed to abnormalities in the lipid-microbiome positive feedback loop which significantly influences the imbalance of the epithelial immune microenvironment (EIME) in atopic dermatitis (AD). This imbalance encompasses impaired lamellar membrane integrity, heightened exposure to epidermal pathogens, and the regulation of innate and adaptive immunity. The lipid-microbiome loop is substantially influenced by intense adaptive immunity which is triggered by abnormal loop activity and affects the loop's integrity through the induction of atypical lipid composition and responses to dysregulated epidermal microbes. Immune responses participate in lipid abnormalities within the EIME by downregulating barrier gene expression and are further cascade-amplified by microbial dysregulation which is instigated by barrier impairment. AIM OF REVIEW This review examines the relationship between abnormal lipid composition, microbiome disturbances, and immune responses in AD while progressively substantiating the crosstalk mechanism among these factors. Based on this analysis, the "lipid-microbiome" positive feedback loop, regulated by immune responses, is proposed. KEY SCIENTIFIC CONCEPTS OF REVIEW The review delves into the impact of adaptive immune responses that regulate the EIME, driving AD, and investigates potential mechanisms by which lipid supplementation and probiotics may alleviate AD through the up-regulation of the epidermal barrier and modulation of immune signaling. This exploration offers support for targeting the EIME to attenuate AD.
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Affiliation(s)
- Junchao Wu
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Lisha Li
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Tingrui Zhang
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Jiaye Lu
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China
| | - Zongguang Tai
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China; Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, 200443, China.
| | - Quangang Zhu
- Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China; Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, 200443, China.
| | - Zhongjian Chen
- School of Medicine, Shanghai University, Shanghai 200444, China; Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200443, China; Shanghai Engineering Research Center for Topical Chinese Medicine, Shanghai, 200443, China.
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Yang Y, Huang J, Zeng A, Long X, Yu N, Wang X. The role of the skin microbiome in wound healing. BURNS & TRAUMA 2024; 12:tkad059. [PMID: 38444635 PMCID: PMC10914219 DOI: 10.1093/burnst/tkad059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/05/2023] [Accepted: 11/21/2023] [Indexed: 03/07/2024]
Abstract
The efficient management of skin wounds for rapid and scarless healing represents a major clinical unmet need. Nonhealing skin wounds and undesired scar formation impair quality of life and result in high healthcare expenditure worldwide. The skin-colonizing microbiota contributes to maintaining an intact skin barrier in homeostasis, but it also participates in the pathogenesis of many skin disorders, including aberrant wound healing, in many respects. This review focuses on the composition of the skin microbiome in cutaneous wounds of different types (i.e. acute and chronic) and with different outcomes (i.e. nonhealing and hypertrophic scarring), mainly based on next-generation sequencing analyses; furthermore, we discuss the mechanistic insights into host-microbe and microbe-microbe interactions during wound healing. Finally, we highlight potential therapeutic strategies that target the skin microbiome to improve healing outcomes.
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Affiliation(s)
- Yuyan Yang
- Department of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1, Shuaifuyuan, Dongcheng District, Beijing, 100005, China
| | - Jiuzuo Huang
- Department of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1, Shuaifuyuan, Dongcheng District, Beijing, 100005, China
| | - Ang Zeng
- Department of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1, Shuaifuyuan, Dongcheng District, Beijing, 100005, China
| | - Xiao Long
- Department of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1, Shuaifuyuan, Dongcheng District, Beijing, 100005, China
| | - Nanze Yu
- Department of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1, Shuaifuyuan, Dongcheng District, Beijing, 100005, China
| | - Xiaojun Wang
- Department of Plastic and Reconstructive Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1, Shuaifuyuan, Dongcheng District, Beijing, 100005, China
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Jaimes J, Patiño LH, Herrera G, Cruz C, Pérez J, Correa-Cárdenas CA, Muñoz M, Ramírez JD. Prokaryotic and eukaryotic skin microbiota modifications triggered by Leishmania infection in localized Cutaneous Leishmaniasis. PLoS Negl Trop Dis 2024; 18:e0012029. [PMID: 38478569 PMCID: PMC10962849 DOI: 10.1371/journal.pntd.0012029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 03/25/2024] [Accepted: 02/27/2024] [Indexed: 03/26/2024] Open
Abstract
Cutaneous Leishmaniasis (CL) is a tropical disease characterized by cutaneous ulcers, sometimes with satellite lesions and nodular lymphangitis. Leishmania parasites, transmitted by sandfly vectors, cause this widespread public health challenge affecting millions worldwide. CL's complexity stems from diverse Leishmania species and intricate host interactions. Therefore, this study aims to shed light on the spatial-temporal distribution of Leishmania species and exploring the influence of skin microbiota on disease progression. We analyzed 40 samples from CL patients at three military bases across Colombia. Using Oxford Nanopore's Heat Shock Protein 70 sequencing, we identified Leishmania species and profiled microbiota in CL lesions and corresponding healthy limbs. Illumina sequencing of 16S-rRNA and 18S-rRNA genes helped analyze prokaryotic and eukaryotic communities. Our research uncovered a spatial-temporal overlap between regions of high CL incidence and our sampling locations, indicating the coexistence of various Leishmania species. L. naiffi emerged as a noteworthy discovery. In addition, our study delved into the changes in skin microbiota associated with CL lesions sampled by scraping compared with healthy skin sampled by brushing of upper and lower limbs. We observed alterations in microbial diversity, both in prokaryotic and eukaryotic communities, within the lesioned areas, signifying the potential role of microbiota in CL pathogenesis. The significant increase in specific bacterial families, such as Staphylococcaceae and Streptococcaceae, within CL lesions indicates their contribution to local inflammation. In essence, our study contributes to the ongoing research into CL, highlighting the need for a multifaceted approach to decipher the intricate interactions between Leishmaniasis and the skin microbiota.
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Affiliation(s)
- Jesús Jaimes
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Luz Helena Patiño
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Giovanny Herrera
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Claudia Cruz
- Grupo de Investigación en Enfermedades Tropicales del Ejército (GINETEJ), Laboratorio de Referencia e Investigación, Dirección de Sanidad Ejército, Bogotá, Colombia
| | - Julie Pérez
- Grupo de Investigación en Enfermedades Tropicales del Ejército (GINETEJ), Laboratorio de Referencia e Investigación, Dirección de Sanidad Ejército, Bogotá, Colombia
| | - Camilo A. Correa-Cárdenas
- Grupo de Investigación en Enfermedades Tropicales del Ejército (GINETEJ), Laboratorio de Referencia e Investigación, Dirección de Sanidad Ejército, Bogotá, Colombia
| | - Marina Muñoz
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Juan David Ramírez
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
- Molecular Microbiology Laboratory, Department of Pathology, Molecular and Cell-based Medicine, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
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Cheng Y, Ren L, Niyazi A, Sheng L, Zhao Y. Identification of potential immunologic resilience in the healing process of diabetic foot ulcers. Int Wound J 2024; 21:e14465. [PMID: 37926487 PMCID: PMC10898407 DOI: 10.1111/iwj.14465] [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: 09/07/2023] [Accepted: 10/15/2023] [Indexed: 11/07/2023] Open
Abstract
Diabetic foot ulcers (DFUs) are one of the most common and challenging complications of diabetes, yet our understanding of their pathogenesis remains limited. We collected gene expression data of DFU patients from public databases. Bioinformatics tools were applied for systematic analysis, including the identification of differentially expressed genes (DEGs), weighted gene co-expression network analysis (WGCNA) and enrichment analysis. We further used single-cell RNA sequencing to identify the distribution of different cell populations in DFU. Finally, key results were validated using reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and flow cytometry. We identified 217 DEGs between ulcerated and healthy skin, and 37 DEGs between healing ulcers and ulcers. WGCNA revealed that the cyan module had the highest positive correlation with healthy skin and negative correlation with ulcers. The black module had the highest negative correlation with healthy skin and positive correlation with ulcers. Enrichment analysis showed that the genes in the cyan module were mainly associated with complement and coagulation cascades, while the genes in the black module were mainly associated with the IL-17 signalling pathway. In addition, CD8 T cells were significantly lower in ulcers than in healthy and healing ulcers. By comparing marker genes of CD8 T cells, we identified key genes in the cyan and black modules and validated their expression using RT-qPCR. The proportion of CD8 T cells was increased in healing ulcers. Flow cytometry detected increased levels of CD8 T, B and natural killer cells in healing ulcers. CD8 T cells and related key genes play an important role in the healing process of DFU. The results of this study provide a new perspective for understanding the pathogenesis and treatment of DFU.
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Affiliation(s)
- Yifeng Cheng
- Department of BurnsThe First Affiliated Hospital of Xinjiang Medical UniversityXinjiangChina
| | - Lei Ren
- Department of BurnsThe First Affiliated Hospital of Xinjiang Medical UniversityXinjiangChina
| | - Aihemaitijiang Niyazi
- Department of BurnsThe First Affiliated Hospital of Xinjiang Medical UniversityXinjiangChina
| | - Li Sheng
- Department of BurnsThe First Affiliated Hospital of Xinjiang Medical UniversityXinjiangChina
| | - Yang Zhao
- Department of BurnsThe First Affiliated Hospital of Xinjiang Medical UniversityXinjiangChina
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Cha J, Kim TG, Bhae E, Gwak HJ, Ju Y, Choe YH, Jang IH, Jung Y, Moon S, Kim T, Lee W, Park JS, Chung YW, Yang S, Kang YK, Hyun YM, Hwang GS, Lee WJ, Rho M, Ryu JH. Skin microbe-dependent TSLP-ILC2 priming axis in early life is co-opted in allergic inflammation. Cell Host Microbe 2024; 32:244-260.e11. [PMID: 38198924 DOI: 10.1016/j.chom.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 09/17/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024]
Abstract
Although early life colonization of commensal microbes contributes to long-lasting immune imprinting in host tissues, little is known regarding the pathophysiological consequences of postnatal microbial tuning of cutaneous immunity. Here, we show that postnatal exposure to specific skin commensal Staphylococcus lentus (S. lentus) promotes the extent of atopic dermatitis (AD)-like inflammation in adults through priming of group 2 innate lymphoid cells (ILC2s). Early postnatal skin is dynamically populated by discrete subset of primed ILC2s driven by microbiota-dependent induction of thymic stromal lymphopoietin (TSLP) in keratinocytes. Specifically, the indole-3-aldehyde-producing tryptophan metabolic pathway, shared across Staphylococcus species, is involved in TSLP-mediated ILC2 priming. Furthermore, we demonstrate a critical contribution of the early postnatal S. lentus-TSLP-ILC2 priming axis in facilitating AD-like inflammation that is not replicated by later microbial exposure. Thus, our findings highlight the fundamental role of time-dependent neonatal microbial-skin crosstalk in shaping the threshold of innate type 2 immunity co-opted in adulthood.
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Affiliation(s)
- Jimin Cha
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Tae-Gyun Kim
- Department of Dermatology, Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea; Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Euihyun Bhae
- Department of Artificial Intelligence, Hanyang University, Seoul 04763, Korea
| | - Ho-Jin Gwak
- Department of Computer Science, Hanyang University, Seoul 04763, Korea
| | - Yeajin Ju
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Young Ho Choe
- Department of Anatomy and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - In-Hwan Jang
- National Creative Research Initiative Center for Hologenomics and School of Biological Sciences, Seoul National University, Seoul 08826, Korea
| | - Youngae Jung
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Sungmin Moon
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Taehyun Kim
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Wuseong Lee
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jung Sun Park
- Development and Differentiation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Youn Wook Chung
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Siyoung Yang
- Department of Biological Sciences, Sungkyunkwan University, Suwon 16419, Korea
| | - Yong-Kook Kang
- Development and Differentiation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Young-Min Hyun
- Department of Anatomy and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Geum-Sook Hwang
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea; College of Pharmacy, Chung-Ang University, Seoul 06974, Korea
| | - Won-Jae Lee
- National Creative Research Initiative Center for Hologenomics and School of Biological Sciences, Seoul National University, Seoul 08826, Korea
| | - Mina Rho
- Department of Computer Science, Hanyang University, Seoul 04763, Korea; Department of Biomedical Informatics, Hanyang University, Seoul 04763, Korea
| | - Ji-Hwan Ryu
- Department of Biomedical Sciences, Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea.
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Marchesini Tovar G, Gallen C, Bergsbaken T. CD8+ Tissue-Resident Memory T Cells: Versatile Guardians of the Tissue. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:361-368. [PMID: 38227907 PMCID: PMC10794029 DOI: 10.4049/jimmunol.2300399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 09/07/2023] [Indexed: 01/18/2024]
Abstract
Tissue-resident memory T (Trm) cells are a subset of T cells maintained throughout life within nonlymphoid tissues without significant contribution from circulating memory T cells. CD8+ Trm cells contribute to both tissue surveillance and direct elimination of pathogens through a variety of mechanisms. Reactivation of these Trm cells during infection drives systematic changes within the tissue, including altering the state of the epithelium, activating local immune cells, and contributing to the permissiveness of the tissue for circulating immune cell entry. Trm cells can be further classified by their functional outputs, which can be either subset- or tissue-specific, and include proliferation, tissue egress, and modulation of tissue physiology. These functional outputs of Trm cells are linked to the heterogeneity and plasticity of this population, and uncovering the unique responses of different Trm cell subsets and their role in immunity will allow us to modulate Trm cell responses for optimal control of disease.
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Affiliation(s)
- Giuseppina Marchesini Tovar
- Center for Immunity and Inflammation, Department of Pathology, Immunology, and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Corey Gallen
- Center for Immunity and Inflammation, Department of Pathology, Immunology, and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - Tessa Bergsbaken
- Center for Immunity and Inflammation, Department of Pathology, Immunology, and Laboratory Medicine, Rutgers New Jersey Medical School, Newark, NJ
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Xing Y, Tsang MSM, Yang Z, Wang MH, Pivniouk V, Leung ASY, Leung TF, Roponen M, Schaub B, Vercelli D, Wong CK, Li J, Wong GWK. Immune modulation by rural exposures and allergy protection. Pediatr Allergy Immunol 2024; 35:e14086. [PMID: 38351891 DOI: 10.1111/pai.14086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 02/16/2024]
Abstract
BACKGROUND Growing up on traditional farms protects children from the development of asthma and allergies. However, we have identified distinct asthma-protective factors, such as poultry exposure. This study aims to examine the biological effect of rural exposure in China. METHODS We recruited 67 rural children (7.4 ± 0.9 years) and 79 urban children (6.8 ± 0.6 years). Depending on the personal history of exposure to domestic poultry (DP), rural children were further divided into those with DP exposure (DP+ , n = 30) and those without (DP- , n = 37). Blood samples were collected to assess differential cell counts and expression of immune-related genes. Dust samples were collected from poultry stables inside rural households. In vivo activities of nasal administration of DP dust extracts were tested in an ovalbumin-induced asthma model. RESULTS There was a stepwise increase in the percentage of eosinophils (%) from rural DP+ children (median = 1.65, IQR = [1.28, 3.75]) to rural DP- children (3.40, [1.70, 6.50]; DP+ vs. DP- , p = .087) and to the highest of their urban counterparts (4.00, [2.00, 7.25]; urban vs. DP+ , p = .017). Similarly, rural children exhibited reduced mRNA expression of immune markers, both at baseline and following lipopolysaccharide (LPS) stimulation. Whereas LPS stimulation induced increased secretion of Th1 and proinflammatory cytokines in rural DP+ children compared to rural DP- children and urban children. Bronchoalveolar lavage of mice with intranasal instillation of dust extracts from DP household showed a significant decrease in eosinophils as compared to those of control mice (p < .05). Furthermore, DP dust strongly inhibited gene expression of Th2 signature cytokines and induced IL-17 expression in the murine asthma model. CONCLUSIONS Immune responses of rural children were dampened compared to urban children and those exposed to DP had further downregulated immune responsiveness. DP dust extracts ameliorated Th2-driven allergic airway inflammation in mice. Determining active protective components in the rural environment may provide directions for the development of primary prevention of asthma.
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Affiliation(s)
- Yuhan Xing
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Miranda Sin-Man Tsang
- Department of Chemical Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Zhaowei Yang
- Department of Allergy and Clinical Immunology, State Key Laboratory of Respiratory Disease, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Maggie Haitian Wang
- Jockey Club School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China
| | - Vadim Pivniouk
- Department of Cellular and Molecular Medicine, Asthma and Airway Disease Research Center, University of Arizona, Tucson, Arizona, USA
| | - Agnes Sze-Yin Leung
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ting-Fan Leung
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Marjut Roponen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Bianca Schaub
- Pediatric Allergology, Department of Pediatrics, Dr von Hauner Children's Hospital, University Hospital, Munich, Germany
| | - Donata Vercelli
- Department of Cellular and Molecular Medicine, Asthma and Airway Disease Research Center, University of Arizona, Tucson, Arizona, USA
| | - Chun-Kwok Wong
- Department of Chemical Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jing Li
- Department of Allergy and Clinical Immunology, State Key Laboratory of Respiratory Disease, The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Gary Wing-Kin Wong
- Department of Paediatrics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
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Zalatan JG, Petrini L, Geiger R. Engineering bacteria for cancer immunotherapy. Curr Opin Biotechnol 2024; 85:103061. [PMID: 38219524 PMCID: PMC10922846 DOI: 10.1016/j.copbio.2023.103061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 10/30/2023] [Accepted: 12/16/2023] [Indexed: 01/16/2024]
Abstract
Bacterial therapeutics have emerged as promising delivery systems to target tumors. These engineered live therapeutics can be harnessed to modulate the tumor microenvironment or to deliver and selectively release therapeutic payloads to tumors. A major challenge is to deliver bacteria systemically without causing widespread inflammation, which is critical for the many tumors that are not accessible to direct intratumoral injection. We describe potential strategies to address this challenge, along with approaches for specific payload delivery and biocontainment to ensure safety. These strategies will pave the way for the development of cost-effective, widely applicable next-generation cancer therapeutics.
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Affiliation(s)
- Jesse G Zalatan
- Department of Chemistry, University of Washington, Seattle, WA, United States.
| | - Lorenzo Petrini
- Institute for Research in Biomedicine, Università della Svizzera italiana, Bellinzona, Switzerland
| | - Roger Geiger
- Institute for Research in Biomedicine, Università della Svizzera italiana, Bellinzona, Switzerland; Institute of Oncology Research, Università della Svizzera italiana, Bellinzona, Switzerland.
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Bousbaine D, Bauman KD, Chen YE, Yu VK, Lalgudi PV, Naziripour A, Veinbachs A, Phung JL, Nguyen TTD, Swenson JM, Lee YE, Dimas A, Jain S, Meng X, Pham TPT, Zhao A, Barkal L, Gribonika I, Van Rompay KKA, Belkaid Y, Barnes CO, Fischbach MA. Discovery and engineering of the antibody response against a prominent skin commensal. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.23.576900. [PMID: 38328052 PMCID: PMC10849572 DOI: 10.1101/2024.01.23.576900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
The ubiquitous skin colonist Staphylococcus epidermidis elicits a CD8 + T cell response pre-emptively, in the absence of an infection 1 . However, the scope and purpose of this anti-commensal immune program are not well defined, limiting our ability to harness it therapeutically. Here, we show that this colonist also induces a potent, durable, and specific antibody response that is conserved in humans and non-human primates. A series of S. epidermidis cell-wall mutants revealed that the cell surface protein Aap is a predominant target. By colonizing mice with a strain of S. epidermidis in which the parallel β-helix domain of Aap is replaced by tetanus toxin fragment C, we elicit a potent neutralizing antibody response that protects mice against a lethal challenge. A similar strain of S. epidermidis expressing an Aap-SpyCatcher chimera can be conjugated with recombinant immunogens; the resulting labeled commensal elicits high titers of antibody under conditions of physiologic colonization, including a robust IgA response in the nasal mucosa. Thus, immunity to a common skin colonist involves a coordinated T and B cell response, the latter of which can be redirected against pathogens as a novel form of topical vaccination.
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Li R, Li J, Zhou X. Lung microbiome: new insights into the pathogenesis of respiratory diseases. Signal Transduct Target Ther 2024; 9:19. [PMID: 38228603 DOI: 10.1038/s41392-023-01722-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 10/25/2023] [Accepted: 11/22/2023] [Indexed: 01/18/2024] Open
Abstract
The lungs were long thought to be sterile until technical advances uncovered the presence of the lung microbial community. The microbiome of healthy lungs is mainly derived from the upper respiratory tract (URT) microbiome but also has its own characteristic flora. The selection mechanisms in the lung, including clearance by coughing, pulmonary macrophages, the oscillation of respiratory cilia, and bacterial inhibition by alveolar surfactant, keep the microbiome transient and mobile, which is different from the microbiome in other organs. The pulmonary bacteriome has been intensively studied recently, but relatively little research has focused on the mycobiome and virome. This up-to-date review retrospectively summarizes the lung microbiome's history, composition, and function. We focus on the interaction of the lung microbiome with the oropharynx and gut microbiome and emphasize the role it plays in the innate and adaptive immune responses. More importantly, we focus on multiple respiratory diseases, including asthma, chronic obstructive pulmonary disease (COPD), fibrosis, bronchiectasis, and pneumonia. The impact of the lung microbiome on coronavirus disease 2019 (COVID-19) and lung cancer has also been comprehensively studied. Furthermore, by summarizing the therapeutic potential of the lung microbiome in lung diseases and examining the shortcomings of the field, we propose an outlook of the direction of lung microbiome research.
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Affiliation(s)
- Ruomeng Li
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Jing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - Xikun Zhou
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
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Albrecht M, Garn H, Buhl T. Epithelial-immune cell interactions in allergic diseases. Eur J Immunol 2024; 54:e2249982. [PMID: 37804068 DOI: 10.1002/eji.202249982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/18/2023] [Accepted: 10/06/2023] [Indexed: 10/08/2023]
Abstract
Epithelial/immune interactions are characterized by the different properties of the various epithelial tissues, the mediators involved, and the varying immune cells that initiate, sustain, or abrogate allergic diseases on the surface. The intestinal mucosa, respiratory mucosa, and regular skin feature structural differences according to their primary function and surroundings. In the context of these specialized functions, the active role of the epithelium in shaping immune responses is increasingly recognizable. Crosstalk between epithelial and immune cells plays an important role in maintaining homeostatic conditions. While cells of the myeloid cell lineage, mainly macrophages, are the dominating immune cell population in the skin and the respiratory tract, lymphocytes comprise most intraepithelial immune cells in the intestine under healthy conditions. Common to all surface epithelia is the fact that innate immune cells represent the first line of immunosurveillance that either directly defeats invading pathogens or initiates and coordinates more effective successive immune responses involving adaptive immune cells and effector cells. Pharmacological approaches for the treatment of allergic and chronic inflammatory diseases involving epithelial barriers target immunological mediators downstream of the epithelium (such as IL-4, IL-5, IL-13, and IgE). The next generation of therapeutics involves upstream events of the inflammatory cascade, such as epithelial-derived alarmins and related mediators.
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Affiliation(s)
- Melanie Albrecht
- Molecular Allergology, Vice President´s Research Group, Paul-Ehrlich-Institut, Langen, Germany
| | - Holger Garn
- Translational Inflammation Research Division and Core Facility for Single Cell Multiomics, Member of the German Center for Lung Research (DZL) and the Universities of Giessen and Marburg Lung Center (UGMLC), Philipps University of Marburg, Marburg, Germany
| | - Timo Buhl
- Department of Dermatology, Venereology and Allergology, University Medical Center Göttingen, Göttingen, Germany
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Le Bras C, Rault L, Jacquet N, Daniel N, Chuat V, Valence F, Bellanger A, Bousarghin L, Blat S, Le Loir Y, Le Huërou-Luron I, Even S. Two human milk-like synthetic bacterial communities displayed contrasted impacts on barrier and immune responses in an intestinal quadricellular model. ISME COMMUNICATIONS 2024; 4:ycad019. [PMID: 38415201 PMCID: PMC10897888 DOI: 10.1093/ismeco/ycad019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 02/29/2024]
Abstract
The human milk (HM) microbiota, a highly diverse microbial ecosystem, is thought to contribute to the health benefits associated with breast-feeding, notably through its impact on infant gut microbiota. Our objective was to further explore the role of HM bacteria on gut homeostasis through a "disassembly/reassembly" strategy. HM strains covering the diversity of HM cultivable microbiota were first characterized individually and then assembled in synthetic bacterial communities (SynComs) using two human cellular models, peripheral blood mononuclear cells and a quadricellular model mimicking intestinal epithelium. Selected HM bacteria displayed a large range of immunomodulatory properties and had variable effects on epithelial barrier, allowing their classification in functional groups. This multispecies characterization of HM bacteria showed no clear association between taxonomy and HM bacteria impacts on epithelial immune and barrier functions, revealing the entirety and complexity of HM bacteria potential. More importantly, the assembly of HM strains into two SynComs of similar taxonomic composition but with strains exhibiting distinct individual properties, resulted in contrasting impacts on the epithelium. These impacts of SynComs partially diverged from the predicted ones based on individual bacteria. Overall, our results indicate that the functional properties of the HM bacterial community rather than the taxonomic composition itself could play a crucial role in intestinal homeostasis of infants.
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Affiliation(s)
- Charles Le Bras
- STLO, INRAE, Institut Agro, Rennes, 35042, France
- Institut NuMeCan, INRAE, INSERM, Univ Rennes, Rennes-Saint Gilles, 35590, France
| | - Lucie Rault
- STLO, INRAE, Institut Agro, Rennes, 35042, France
| | | | | | | | | | | | - Latifa Bousarghin
- Institut NuMeCan, INRAE, INSERM, Univ Rennes, Rennes-Saint Gilles, 35590, France
| | - Sophie Blat
- Institut NuMeCan, INRAE, INSERM, Univ Rennes, Rennes-Saint Gilles, 35590, France
| | - Yves Le Loir
- STLO, INRAE, Institut Agro, Rennes, 35042, France
| | | | - Sergine Even
- STLO, INRAE, Institut Agro, Rennes, 35042, France
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Kulalert W, Wells AC, Link VM, Lim AI, Bouladoux N, Nagai M, Harrison OJ, Kamenyeva O, Kabat J, Enamorado M, Chiu IM, Belkaid Y. The neuroimmune CGRP-RAMP1 axis tunes cutaneous adaptive immunity to the microbiota. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.26.573358. [PMID: 38234748 PMCID: PMC10793430 DOI: 10.1101/2023.12.26.573358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
The somatosensory nervous system surveils external stimuli at barrier tissues, regulating innate immune cells under infection and inflammation. The roles of sensory neurons in controlling the adaptive immune system, and more specifically immunity to the microbiota, however, remain elusive. Here, we identified a novel mechanism for direct neuroimmune communication between commensal-specific T lymphocytes and somatosensory neurons mediated by the neuropeptide Calcitonin Gene-Related Peptide (CGRP) in the skin. Intravital imaging revealed that commensal-specific T cells are in close proximity to cutaneous nerve fibers in vivo . Correspondingly, we observed upregulation of the receptor for the neuropeptide CGRP, RAMP1, in CD8 + T lymphocytes induced by skin commensal colonization. Neuroimmune CGRP-RAMP1 signaling axis functions in commensal-specific T cells to constrain Type 17 responses and moderate the activation status of microbiota-reactive lymphocytes at homeostasis. As such, modulation of neuroimmune CGRP-RAMP1 signaling in commensal-specific T cells shapes the overall activation status of the skin epithelium, thereby impacting the outcome of responses to insults such as wounding. The ability of somatosensory neurons to control adaptive immunity to the microbiota via the CGRP-RAMP1 axis underscores the various layers of regulation and multisystem coordination required for optimal microbiota-reactive T cell functions under steady state and pathology. Significance statement Multisystem coordination at barrier surfaces is critical for optimal tissue functions and integrity, in response to microbial and environmental cues. In this study, we identified a novel neuroimmune crosstalk mechanism between the sensory nervous system and the adaptive immune response to the microbiota, mediated by the neuropeptide CGRP and its receptor RAMP1 on skin microbiota-induced T lymphocytes. The neuroimmune CGPR-RAMP1 axis constrains adaptive immunity to the microbiota and overall limits the activation status of the skin epithelium, impacting tissue responses to wounding. Our study opens the door to a new avenue to modulate adaptive immunity to the microbiota utilizing neuromodulators, allowing for a more integrative and tailored approach to harnessing microbiota-induced T cells to promote barrier tissue protection and repair.
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Neyens D, Hirsch T, Abdel Aziz Issa Abdel Hadi A, Dauguet N, Vanhaver C, Bayard A, Wildmann C, Luyckx M, Squifflet JL, D’Hondt Q, Duhamel C, Huaux A, Montiel V, Dechamps M, van der Bruggen P. HELIOS-expressing human CD8 T cells exhibit limited effector functions. Front Immunol 2023; 14:1308539. [PMID: 38187391 PMCID: PMC10770868 DOI: 10.3389/fimmu.2023.1308539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/15/2023] [Indexed: 01/09/2024] Open
Abstract
Introduction The transcription factor HELIOS is primarily known for its expression in CD4 regulatory T cells, both in humans and mice. In mice, HELIOS is found in exhausted CD8 T cells. However, information on human HELIOS+ CD8 T cells is limited and conflicting. Methods In this study, we characterized by flow cytometry and transcriptomic analyses human HELIOS+ CD8 T cells. Results These T cells primarily consist of memory cells and constitute approximately 21% of blood CD8 T cells. In comparison with memory HELIOS- T-BEThigh CD8 T cells that displayed robust effector functions, the memory HELIOS+ T-BEThigh CD8 T cells produce lower amounts of IFN-γ and TNF-α and have a lower cytotoxic potential. We wondered if these cells participate in the immune response against viral antigens, but did not find HELIOS+ cells among CD8 T cells recognizing CMV peptides presented by HLA-A2 and HLA-B7. However, we found HELIOS+ CD8 T cells that recognize a CMV peptide presented by MHC class Ib molecule HLA-E. Additionally, a portion of HELIOS+ CD8 T cells is characterized by the expression of CD161, often used as a surface marker for identifying TC17 cells. These CD8 T cells express TH17/TC17-related genes encoding RORgt, RORa, PLZF, and CCL20. Discussion Our findings emphasize that HELIOS is expressed across various CD8 T cell populations, highlighting its significance beyond its role as a transcription factor for Treg or exhausted murine CD8 T cells. The significance of the connection between HELIOS and HLA-E restriction is yet to be understood.
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Affiliation(s)
- Damien Neyens
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Thibault Hirsch
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | | | - Nicolas Dauguet
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | | | - Alexandre Bayard
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Claude Wildmann
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Mathieu Luyckx
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
- Département de gynécologie, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Jean-Luc Squifflet
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
- Département de gynécologie, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Quentin D’Hondt
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Céline Duhamel
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Antoine Huaux
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - Virginie Montiel
- Unité de soins intensifs, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Mélanie Dechamps
- Unité de soins intensifs, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Pierre van der Bruggen
- De Duve Institute, Université Catholique de Louvain, Brussels, Belgium
- Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wavre, Belgium
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Datta A, Das D, Nett JE, Vyas JM, Lionakis MS, Thangamani S. Differential skin immune responses in mice intradermally infected with Candida auris and Candida albicans. Microbiol Spectr 2023; 11:e0221523. [PMID: 37811989 PMCID: PMC10848846 DOI: 10.1128/spectrum.02215-23] [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: 05/25/2023] [Accepted: 08/22/2023] [Indexed: 10/10/2023] Open
Abstract
IMPORTANCE Candida auris is a globally emerging fungal pathogen that transmits among individuals in hospitals and nursing home residents. Unlike other Candida species, C. auris predominantly colonizes and persists in skin tissue, resulting in outbreaks of nosocomial infections. Understanding the factors that regulate C. auris skin colonization is critical to develop novel preventive and therapeutic approaches against this emerging pathogen. We established a model of intradermal C. auris inoculation in mice and found that mice infected with C. auris elicit less potent innate and adaptive immune responses in the infected skin compared to C. albicans. These findings help explain the clinical observation of persistent C. auris colonization in skin tissue.
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Affiliation(s)
- Abhishek Datta
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
| | - Diprasom Das
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
| | - Jeniel E. Nett
- Department of Medicine, University of Wisconsin, Madison, Wisconsin, USA
- Department of Medical Microbiology and Immunology, University of Wisconsin, Madison, Wisconsin, USA
| | - Jatin M. Vyas
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Michail S. Lionakis
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Shankar Thangamani
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
- Purdue Institute for Immunology, Inflammation and Infectious Diseases (PI4D), West Lafayette, Indiana, USA
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49
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Khadka VD, Markey L, Boucher M, Lieberman TD. Commensal skin bacteria exacerbate inflammation and delay skin healing. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.04.569980. [PMID: 38106058 PMCID: PMC10723327 DOI: 10.1101/2023.12.04.569980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
The skin microbiome can both trigger beneficial immune stimulation and pose a potential infection threat. Previous studies have shown that colonization of mouse skin with the model human skin commensal Staphylococcus epidermidis is protective against subsequent excisional wound or pathogen challenge. However, less is known about concurrent skin damage and exposure to commensal microbes, despite growing interest in interventional probiotic therapy. Here, we address this open question by applying commensal skin bacteria at a high dose to abraded skin. While depletion of the skin microbiome via antibiotics delayed repair from damage, application of commensals-- including the mouse commensal Staphylococcus xylosus, three distinct isolates of S. epidermidis, and all other tested human skin commensals-- also significantly delayed barrier repair. Increased inflammation was observed within four hours of S. epidermidis exposure and persisted through day four, at which point the skin displayed a chronic-wound-like inflammatory state with increased neutrophil infiltration, increased fibroblast activity, and decreased monocyte differentiation. Transcriptomic analysis suggested that the prolonged upregulation of early canonical proliferative pathways inhibited the progression of barrier repair. These results highlight the nuanced role of members of the skin microbiome in modulating barrier integrity and indicate the need for caution in their development as probiotics.
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Affiliation(s)
- Veda D Khadka
- Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology; Cambridge, MA, United States
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology; Cambridge, MA, United States
| | - Laura Markey
- Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology; Cambridge, MA, United States
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology; Cambridge, MA, United States
| | - Magalie Boucher
- Division of Comparative Medicine, Massachusetts Institute of Technology; Cambridge, MA, United States
| | - Tami D Lieberman
- Institute for Medical Engineering and Sciences, Massachusetts Institute of Technology; Cambridge, MA, United States
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology; Cambridge, MA, United States
- Ragon Institute of Mass General, MIT and Harvard; Cambridge. MA, United States
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50
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Park SL, Christo SN, Wells AC, Gandolfo LC, Zaid A, Alexandre YO, Burn TN, Schröder J, Collins N, Han SJ, Guillaume SM, Evrard M, Castellucci C, Davies B, Osman M, Obers A, McDonald KM, Wang H, Mueller SN, Kannourakis G, Berzins SP, Mielke LA, Carbone FR, Kallies A, Speed TP, Belkaid Y, Mackay LK. Divergent molecular networks program functionally distinct CD8 + skin-resident memory T cells. Science 2023; 382:1073-1079. [PMID: 38033053 DOI: 10.1126/science.adi8885] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 11/01/2023] [Indexed: 12/02/2023]
Abstract
Skin-resident CD8+ T cells include distinct interferon-γ-producing [tissue-resident memory T type 1 (TRM1)] and interleukin-17 (IL-17)-producing (TRM17) subsets that differentially contribute to immune responses. However, whether these populations use common mechanisms to establish tissue residence is unknown. In this work, we show that TRM1 and TRM17 cells navigate divergent trajectories to acquire tissue residency in the skin. TRM1 cells depend on a T-bet-Hobit-IL-15 axis, whereas TRM17 cells develop independently of these factors. Instead, c-Maf commands a tissue-resident program in TRM17 cells parallel to that induced by Hobit in TRM1 cells, with an ICOS-c-Maf-IL-7 axis pivotal to TRM17 cell commitment. Accordingly, by targeting this pathway, skin TRM17 cells can be ablated without compromising their TRM1 counterparts. Thus, skin-resident T cells rely on distinct molecular circuitries, which can be exploited to strategically modulate local immunity.
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Affiliation(s)
- Simone L Park
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Susan N Christo
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Alexandria C Wells
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD, USA
| | - Luke C Gandolfo
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- School of Mathematics and Statistics, The University of Melbourne, Melbourne, VIC, Australia
- Walter and Eliza Hall Institute for Medical Research, Parkville, VIC, Australia
| | - Ali Zaid
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Yannick O Alexandre
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Thomas N Burn
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Jan Schröder
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Nicholas Collins
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD, USA
| | - Seong-Ji Han
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD, USA
| | - Stéphane M Guillaume
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Maximilien Evrard
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Clara Castellucci
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Brooke Davies
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Maleika Osman
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Andreas Obers
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Keely M McDonald
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Huimeng Wang
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Scott N Mueller
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - George Kannourakis
- Institute of Innovation, Science and Sustainability, Federation University Australia, Ballarat, VIC, Australia
- Fiona Elsey Cancer Research Institute, Ballarat, VIC, Australia
| | - Stuart P Berzins
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
- Institute of Innovation, Science and Sustainability, Federation University Australia, Ballarat, VIC, Australia
- Fiona Elsey Cancer Research Institute, Ballarat, VIC, Australia
| | - Lisa A Mielke
- Olivia Newton-John Cancer Research Institute, La Trobe University School of Cancer Medicine, Heidelberg, VIC, Australia
| | - Francis R Carbone
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Axel Kallies
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Terence P Speed
- School of Mathematics and Statistics, The University of Melbourne, Melbourne, VIC, Australia
- Walter and Eliza Hall Institute for Medical Research, Parkville, VIC, Australia
| | - Yasmine Belkaid
- Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health, Bethesda, MD, USA
- NIAID Microbiome Program, NIAID, National Institutes of Health, Bethesda, MD, USA
| | - Laura K Mackay
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
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