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Wang L, Gui Y, Li K, Tao W, Li C, Qiu J, Ma J. Biomimetic and multifunctional nanocomposites for precision fungi theranostics. Biomaterials 2024; 308:122561. [PMID: 38603827 DOI: 10.1016/j.biomaterials.2024.122561] [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: 12/18/2023] [Revised: 03/12/2024] [Accepted: 03/31/2024] [Indexed: 04/13/2024]
Abstract
Fungi infection is a serious threat to public health, but an effective antifungal strategy remains a challenge. Herein, a biomimetic nanocomposite with multifunctionalities, including fungi diagnosis, antifungal adhesion, precise fungi elimination, and cytokine sequestration, is constructed for battling Candida albicans (C. albicans) infection. By screening a range of cells, we find that the polarized macrophage cells have the strongest binding tendency toward C. albicans. Thus, their membranes were exfoliated to camouflage UCNPs and then decorated with photosensitizers (methylene blue, MB) and DNA sensing elements. The resulting nanocomposite can tightly bind to fungal surfaces, promote DNA recognition, and squeeze pro-inflammatory cytokines to relieve inflammation. Consequently, this nanocomposite can detect C. albicans with enhanced sensitivity and precisely eliminate fungal cells through photodynamic therapy with minimal phototoxicity because of its switchable fluorescence behavior. The developed nanocomposite with good biocompatibility achieves a satisfactory diagnostic and therapeutic effect in a C. albicans-infected mouse model, which offers a unique approach to fight fungi infection.
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Affiliation(s)
- Li Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, PR China
| | - Yueyue Gui
- Department of Obstetrics and Gynecology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, PR China
| | - Kexin Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, PR China
| | - Wei Tao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, PR China
| | - Chao Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, PR China.
| | - Jin Qiu
- Department of Obstetrics and Gynecology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, PR China.
| | - Jiehua Ma
- Department of Obstetrics and Gynecology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, PR China.
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Shankar J, Thakur R, Clemons KV, Stevens DA. Interplay of Cytokines and Chemokines in Aspergillosis. J Fungi (Basel) 2024; 10:251. [PMID: 38667922 PMCID: PMC11051073 DOI: 10.3390/jof10040251] [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: 02/06/2024] [Revised: 03/11/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024] Open
Abstract
Aspergillosis is a fungal infection caused by various species of Aspergillus, most notably A. fumigatus. This fungus causes a spectrum of diseases, including allergic bronchopulmonary aspergillosis, aspergilloma, chronic pulmonary aspergillosis, and invasive aspergillosis. The clinical manifestations and severity of aspergillosis can vary depending on individual immune status and the specific species of Aspergillus involved. The recognition of Aspergillus involves pathogen-associated molecular patterns (PAMPs) such as glucan, galactomannan, mannose, and conidial surface proteins. These are recognized by the pathogen recognition receptors present on immune cells such as Toll-like receptors (TLR-1,2,3,4, etc.) and C-type lectins (Dectin-1 and Dectin-2). We discuss the roles of cytokines and pathogen recognition in aspergillosis from both the perspective of human and experimental infection. Several cytokines and chemokines have been implicated in the immune response to Aspergillus infection, including interferon-γ (IFN-γ), tumor necrosis factor-α (TNF-α), CCR4, CCR17, and other interleukins. For example, allergic bronchopulmonary aspergillosis (ABPA) is characterized by Th2 and Th9 cell-type immunity and involves interleukin (IL)-4, IL-5, IL-13, and IL-10. In contrast, it has been observed that invasive aspergillosis involves Th1 and Th17 cell-type immunity via IFN-γ, IL-1, IL-6, and IL-17. These cytokines activate various immune cells and stimulate the production of other immune molecules, such as antimicrobial peptides and reactive oxygen species, which aid in the clearance of the fungal pathogen. Moreover, they help to initiate and coordinate the immune response, recruit immune cells to the site of infection, and promote clearance of the fungus. Insight into the host response from both human and animal studies may aid in understanding the immune response in aspergillosis, possibly leading to harnessing the power of cytokines or cytokine (receptor) antagonists and transforming them into precise immunotherapeutic strategies. This could advance personalized medicine.
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Affiliation(s)
- Jata Shankar
- Genomic Laboratory, Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat Solan 173234, Himachal Pradesh, India
| | - Raman Thakur
- Department of Medical Laboratory Science, Lovely Professional University, Jalandhar 144001, Punjab, India;
| | - Karl V. Clemons
- California Institute for Medical Research, San Jose, CA 95128, USA; (K.V.C.); (D.A.S.)
- Division of Infectious Diseases and Geographic Medicine, Stanford University Medical School, Stanford, CA 94305, USA
| | - David A. Stevens
- California Institute for Medical Research, San Jose, CA 95128, USA; (K.V.C.); (D.A.S.)
- Division of Infectious Diseases and Geographic Medicine, Stanford University Medical School, Stanford, CA 94305, USA
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Meng F, Tian C. Gene Family Expansion during the Adaptation of Colletotrichum gloeosporioides to Woody Plants. J Fungi (Basel) 2023; 9:1185. [PMID: 38132786 PMCID: PMC10744947 DOI: 10.3390/jof9121185] [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] [Received: 11/17/2023] [Revised: 12/08/2023] [Accepted: 12/08/2023] [Indexed: 12/23/2023] Open
Abstract
Gene gains/losses during evolution are critical for the adaptation of organisms to new environments or hosts. However, it remains unknown whether gene family expansions facilitated the adaptation of phytopathogenic fungi to woody plants. In this study, we compared the newly sequenced genome of the Colletotrichum gloeosporioides strain CFCC80308 with the genomes of two other C. gloeosporioides strains, Cg-14 and Lc-1, isolated from Persea americana and Liriodendron leaves, respectively. The genes in the expanded families, which were associated with plant surface signal recognition, encoded various proteins, including glycosyde hydrolases (GHs) and cytochrome P450. Interestingly, there was a substantial increase in the number of GH family genes in CFCC80308. Specifically, there were 368 enriched genes in the GH families (e.g., GH1, GH3, GH10, GH12, GH15, GH16, GH17, GH18, GH25, GH32, GH53, GH61, GH76, and GH81); the expression levels of these genes were highly up-regulated during the infection of poplar trees. Additionally, the GH17 family was larger in CFCC80308 than in C. gloeosporioides strains Cg-14 and Lc-1. Furthermore, the expansion of the MP65-encoding gene family during the adaptation of Colletotrichum species to woody plants was consistent with the importance of gene gains/losses for the adaptation of organisms to their environments. This study has clarified how C. gloeosporioides adapted to woody plants during evolution.
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Affiliation(s)
- Fanli Meng
- The Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing 100083, China;
- Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, Beijing 100083, China
| | - Chengming Tian
- The Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing 100083, China;
- Beijing Key Laboratory for Forest Pest Control, College of Forestry, Beijing Forestry University, Beijing 100083, China
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de Abreu CG, Roesch LFW, Andreote FD, Silva SR, de Moraes TSJ, Zied DC, de Siqueira FG, Dias ES, Varani AM, Pylro VS. Decoding the chromosome-scale genome of the nutrient-rich Agaricus subrufescens: a resource for fungal biology and biotechnology. Res Microbiol 2023; 174:104116. [PMID: 37573924 DOI: 10.1016/j.resmic.2023.104116] [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: 05/12/2023] [Revised: 07/31/2023] [Accepted: 08/07/2023] [Indexed: 08/15/2023]
Abstract
Agaricus subrufescens, also known as the "sun mushroom," has significant nutritional and medicinal value. However, its short shelf life due to the browning process results in post-harvest losses unless it's quickly dehydrated. This restricts its availability to consumers in the form of capsules. A genome sequence of A. subrufescens may lead to new cultivation alternatives or the application of gene editing strategies to delay the browning process. We assembled a chromosome-scale genome using a hybrid approach combining Illumina and Nanopore sequencing. The genome was assembled into 13 chromosomes and 31 unplaced scaffolds, totaling 44.5 Mb with 96.5% completeness and 47.24% GC content. 14,332 protein-coding genes were identified, with 64.6% of the genome covered by genes and 23.41% transposable elements. The mitogenome was circularized and encoded fourteen typical mitochondrial genes. Four polyphenol oxidase (PPO) genes and the Mating-type locus were identified. Phylogenomic analysis supports the placement of A. subrufescens in the Agaricomycetes clade. This is the first available genome sequence of a strain of the "sun mushroom." Results are available through a Genome Browser (https://plantgenomics.ncc.unesp.br/gen.php?id=Asub) and can support further fungal biological and genomic studies.
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Affiliation(s)
| | | | - Fernando Dini Andreote
- Department of Soil Science, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, SP, Brazil
| | - Saura Rodrigues Silva
- Department of Microbiology and Cell Science, University of Florida, Gainesville, FL, USA
| | | | - Diego Cunha Zied
- Department of Crop Production, School of Agricultural and Technological Sciences, São Paulo State University (UNESP), Dracena, São Paulo, Brazil
| | | | - Eustáquio Souza Dias
- Department of Biology, Federal University of Lavras - UFLA, Lavras, Minas Gerais, Brazil
| | - Alessandro M Varani
- UNESP - São Paulo State University, School of Agricultural and Veterinarian Sciences, Department of Agricultural and Environmental Biotechnology, Campus Jaboticabal, CEP 14884-900, SP, Brazil.
| | - Victor Satler Pylro
- Department of Biology, Federal University of Lavras - UFLA, Lavras, Minas Gerais, Brazil.
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Panwar D, Shubhashini A, Kapoor M. Complex alpha and beta mannan foraging by the human gut bacteria. Biotechnol Adv 2023; 66:108166. [PMID: 37121556 DOI: 10.1016/j.biotechadv.2023.108166] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 05/02/2023]
Abstract
The human gut microbiota (HGM), a community of trillions of microbes, underscores its contribution by impacting many facets of host health and disease. In the HGM, Bacteroidota and Bacillota represent dominant bacterial phyla, which mainly rely on the glycans recalcitrant to host digestion to meet their energy requirements. Accordingly, the impact of dietary and host-derived glycans in the assembly and operation of these dominant microbial communities continues to be an area of active research. Among various glycans, mannans represent an integral component of the human diet. Apart from their health effects, the diverse and complex mannan structures bears molecular signatures that alter the expression of specific gene clusters in selected Bacteroidota and Bacillota species. Both the phyla possess variable and sophisticated loci of mannan recognition proteins, hydrolytic enzymes, transporters, and other metabolic proteins to sense, capture and utilize mannans as an energy source. The current review summarizes mannan structural diversity, and strategies adopted by select species of the HGM bacteria to forage mannans by focusing primarily on glycoside hydrolases and their effects on host health and metabolism.
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Affiliation(s)
- Deepesh Panwar
- Department of Microbiology and Fermentation Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, UP 201 002, India
| | - A Shubhashini
- Department of Microbiology and Fermentation Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India
| | - Mukesh Kapoor
- Department of Microbiology and Fermentation Technology, CSIR-Central Food Technological Research Institute, Mysuru 570 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, UP 201 002, India.
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Reedy JL, Crossen AJ, Negoro PE, Harding HB, Ward RA, Vargas-Blanco DA, Timmer KD, Reardon CM, Basham KJ, Mansour MK, Wüthrich M, Fontaine T, Latgé JP, Vyas JM. The C-Type Lectin Receptor Dectin-2 Is a Receptor for Aspergillus fumigatus Galactomannan. mBio 2023; 14:e0318422. [PMID: 36598192 PMCID: PMC9973300 DOI: 10.1128/mbio.03184-22] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 11/21/2022] [Indexed: 01/05/2023] Open
Abstract
Aspergillus fumigatus is a ubiquitous environmental mold that causes significant mortality particularly among immunocompromised patients. The detection of the Aspergillus-derived carbohydrate galactomannan in patient serum and bronchoalveolar lavage fluid is the major biomarker used to detect A. fumigatus infection in clinical medicine. Despite the clinical relevance of this carbohydrate, we lack a fundamental understanding of how galactomannan is recognized by the immune system and its consequences. Galactomannan is composed of a linear mannan backbone with galactofuranose sidechains and is found both attached to the cell surface of Aspergillus and as a soluble carbohydrate in the extracellular milieu. In this study, we utilized fungal-like particles composed of highly purified Aspergillus galactomannan to identify a C-type lectin host receptor for this fungal carbohydrate. We identified a novel and specific interaction between Aspergillus galactomannan and the C-type lectin receptor Dectin-2. We demonstrate that galactomannan bound to Dectin-2 and induced Dectin-2-dependent signaling, including activation of spleen tyrosine kinase, gene transcription, and tumor necrosis factor alpha (TNF-α) production. Deficiency of Dectin-2 increased immune cell recruitment to the lungs but was dispensable for survival in a mouse model of pulmonary aspergillosis. Our results identify a novel interaction between galactomannan and Dectin-2 and demonstrate that Dectin-2 is a receptor for galactomannan, which leads to a proinflammatory immune response in the lung. IMPORTANCE Aspergillus fumigatus is a fungal pathogen that causes serious and often fatal disease in humans. The surface of Aspergillus is composed of complex sugar molecules. Recognition of these carbohydrates by immune cells by carbohydrate lectin receptors can lead to clearance of the infection or, in some cases, benefit the fungus by dampening the host response. Galactomannan is a carbohydrate that is part of the cell surface of Aspergillus but is also released during infection and is found in patient lungs as well as their bloodstreams. The significance of our research is that we have identified Dectin-2 as a mammalian immune cell receptor that recognizes, binds, and signals in response to galactomannan. These results enhance our understanding of how this carbohydrate interacts with the immune system at the site of infection and will lead to broader understanding of how release of galactomannan by Aspergillus effects the immune response in infected patients.
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Affiliation(s)
- Jennifer L. Reedy
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Department of Medicine, Boston, Massachusetts, USA
| | - Arianne J. Crossen
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Paige E. Negoro
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Hannah Brown Harding
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Rebecca A. Ward
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Diego A. Vargas-Blanco
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Kyle D. Timmer
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Christopher M. Reardon
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Kyle J. Basham
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Michael K. Mansour
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Department of Medicine, Boston, Massachusetts, USA
| | - Marcel Wüthrich
- Department of Pediatrics, University of Wisconsin Medical School, University of Wisconsin Hospital and Clinics, Madison, Wisconsin, USA
| | - Thierry Fontaine
- Institut Pasteur, Université de Paris, INRAE, USC2019, Unité Biologie et Pathogénicité Fongiques, Paris, France
| | - Jean-Paul Latgé
- Institute of Molecular Biology and Biotechnology (IMBBFORTH), University of Crete, Heraklion, Greece
| | - Jatin M. Vyas
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Department of Medicine, Boston, Massachusetts, USA
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Jaffey JA, Shubitz LF, Johnson MDL, Bolch CA, da Cunha A, Murthy AK, Lopez BS, Monasky R, Carswell I, Spiker J, Neubert MJ, Menghani SV. Evaluation of Host Constitutive and Ex Vivo Coccidioidal Antigen-Stimulated Immune Response in Dogs with Naturally Acquired Coccidioidomycosis. J Fungi (Basel) 2023; 9:jof9020213. [PMID: 36836327 PMCID: PMC9959558 DOI: 10.3390/jof9020213] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/10/2023] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
The early innate immune response to coccidioidomycosis has proven to be pivotal in directing the adaptive immune response and disease outcome in mice and humans but is unexplored in dogs. The objectives of this study were to evaluate the innate immune profile of dogs with coccidioidomycosis and determine if differences exist based on the extent of infection (i.e., pulmonary or disseminated). A total of 28 dogs with coccidioidomycosis (pulmonary, n = 16; disseminated, n = 12) and 10 seronegative healthy controls were enrolled. Immunologic testing was performed immediately, without ex vivo incubation (i.e., constitutive), and after coccidioidal antigen stimulation of whole blood cultures. Whole blood cultures were incubated with a phosphate-buffered solution (PBS) (negative control) or a coccidioidal antigen (rCTS1 (105-310); 10 µg/mL) for 24 h. A validated canine-specific multiplex bead-based assay was used to measure 12 cytokines in plasma and cell culture supernatant. Serum C-reactive protein (CRP) was measured with an ELISA assay. Leukocyte expression of toll-like receptors (TLRs)2 and TLR4 was measured using flow cytometry. Dogs with coccidioidomycosis had higher constitutive plasma keratinocyte chemotactic (KC)-like concentrations (p = 0.02) and serum CRP concentrations compared to controls (p < 0.001). Moreover, dogs with pulmonary coccidioidomycosis had higher serum CRP concentrations than those with dissemination (p = 0.001). Peripheral blood leukocytes from dogs with coccidioidomycosis produced higher concentrations of tumor necrosis factor (TNF)-α (p = 0.0003), interleukin (IL)-6 (p = 0.04), interferon (IFN)-γ (p = 0.03), monocyte chemoattractant protein (MCP)-1 (p = 0.02), IL-10 (p = 0.02), and lower IL-8 (p = 0.003) in supernatants following coccidioidal antigen stimulation when compared to those from control dogs. There was no detectable difference between dogs with pulmonary and disseminated disease. No differences in constitutive or stimulated leukocyte TLR2 and TLR4 expression were found. These results provide information about the constitutive and coccidioidal antigen-specific stimulated immune profile in dogs with naturally acquired coccidioidomycosis.
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Affiliation(s)
- Jared A. Jaffey
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
- Correspondence:
| | - Lisa F. Shubitz
- Valley Fever Center for Excellence, College of Medicine-Tucson, University of Arizona, Tucson, AZ 85724, USA
| | - Michael D. L. Johnson
- Department of Immunobiology, Valley Fever Center for Excellence, BIO5 Institute, Asthma and Airway Disease Research Center, University of Arizona, College of Medicine-Tucson, Tucson, AZ 85724, USA
| | - Charlotte A. Bolch
- Office of Research and Sponsored Programs, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Anderson da Cunha
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Ashlesh K. Murthy
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Brina S. Lopez
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Ross Monasky
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Imani Carswell
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Justine Spiker
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Miranda J. Neubert
- Department of Immunobiology, College of Medicine-Tucson, Tucson, AZ 85724, USA
| | - Sanjay V. Menghani
- Department of Immunobiology, Medical Scientist Training Program, College of Medicine-Tucson, Tucson, AZ 85724, USA
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Soliman AM, Barreda DR. Acute Inflammation in Tissue Healing. Int J Mol Sci 2022; 24:ijms24010641. [PMID: 36614083 PMCID: PMC9820461 DOI: 10.3390/ijms24010641] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/19/2022] [Accepted: 12/28/2022] [Indexed: 12/31/2022] Open
Abstract
There are well-established links between acute inflammation and successful tissue repair across evolution. Innate immune reactions contribute significantly to pathogen clearance and activation of subsequent reparative events. A network of molecular and cellular regulators supports antimicrobial and tissue repair functions throughout the healing process. A delicate balance must be achieved between protection and the potential for collateral tissue damage associated with overt inflammation. In this review, we summarize the contributions of key cellular and molecular components to the acute inflammatory process and the effective and timely transition toward activation of tissue repair mechanisms. We further discuss how the disruption of inflammatory responses ultimately results in chronic non-healing injuries.
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Affiliation(s)
- Amro M. Soliman
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Daniel R. Barreda
- Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2R3, Canada
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada
- Correspondence: ; Tel.: +1-(780)492-0375
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Zhao HX, Zhang TY, Wang H, Hu CY, Tang YL, Xu B. Occurrence of fungal spores in drinking water: A review of pathogenicity, odor, chlorine resistance and control strategies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 853:158626. [PMID: 36087680 DOI: 10.1016/j.scitotenv.2022.158626] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/17/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
Fungi in drinking water have been long neglected due to the lack of convenient analysis methods, widely accepted regulations and efficient control strategies. However, in the last few decades, fungi in drinking water have been widely recognized as opportunity pathogens that cause serious damage to the health of immune-compromised individuals. In drinking water treatment plants, fungal spores are more resistant to chlorine disinfection than bacteria and viruses, which can regrow in drinking water distribution systems and subsequently pose health threats to water consumers. In addition, fungi in drinking water may represent an ignored source of taste and odor (T&O). This review identified 74 genera of fungi isolated from drinking water and presented their detailed taxonomy, sources and biomass levels in drinking water systems. The typical pathways of exposure of water-borne fungi and the main effects on human health are clarified. The fungi producing T&O compounds and their products are summarized. Data on free chlorine or monochloramine inactivation of fungal spores and other pathogens are compared. At the first time, we suggested four chlorine-resistant mechanisms including aggregation to tolerate chlorine, strong cell walls, cellular responses to oxidative stress and antioxidation of melanin, which are instructive for the future fungi control attempts. Finally, the inactivation performance of fungal spores by various technologies are comprehensively analyzed. The purpose of this study is to provide an overview of fungi distribution and risks in drinking water, provide insight into the chlorine resistance mechanisms of fungal spores and propose approaches for the control of fungi in drinking water.
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Affiliation(s)
- Heng-Xuan Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Tian-Yang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Hong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Chen-Yan Hu
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, PR China
| | - Yu-Lin Tang
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Bin Xu
- State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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Chavanke SN, Penna S, Dalvi SG. β-Glucan and its nanocomposites in sustainable agriculture and environment: an overview of mechanisms and applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:80062-80087. [PMID: 35641741 DOI: 10.1007/s11356-022-20938-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 05/15/2022] [Indexed: 05/23/2023]
Abstract
β-Glucan is an eco-friendly, biodegradable, and economical biopolymer with important roles for acquiring adaptations to mitigate climate change in crop plants. β-Glucan plays a crucial role in the activation of functional plant innate immune system by triggering the downward signaling cascade/s, resulting in the accumulation of different pathogenesis-related proteins (PR-proteins), reactive oxygen species (ROS), antioxidant defense enzymes, Ca2+-influx as well as activation of mitogen-activated protein kinase (MAPK) pathway. Recent experimental studies have shown that β-glucan recognition is mediated by co-receptor LysMPRR (lysin motif pattern recognition receptor)-CERK1 (chitin elicitor receptor kinase 1), LYK4, and LYK5 (LysM-containing receptor-like kinase), as well as different receptor systems in plants that could be plant species-specific and/or age and/or tissue-dependent. Transgenic overexpression of β-glucanase, chitinase, and/or in combination with other PR-proteins like cationic peroxidase, AP24,thaumatin-likeprotein 1 (TLP-1) has also been achieved for improving plant disease resistance in crop plants, but the transgenic methods have some ethical and environmental concerns. In this regard, elicitation of plant immunity using biopolymer like β-glucan and chitosan offers an economical, safe, and publicly acceptable method. The β-glucan and chitosan nanocomposites have proven to be useful for the activation of plant defense pathways and to enhance plant response/systemic acquired resistance (SAR) against broad types of plant pathogens and mitigating multiple stresses under the changing climate conditions.
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Affiliation(s)
- Somnath N Chavanke
- Tissue Culture Section, Agri. Sci. & Tech. Dept., Vasantdada Sugar Institute, Pune, India
| | | | - Sunil Govind Dalvi
- Tissue Culture Section, Agri. Sci. & Tech. Dept., Vasantdada Sugar Institute, Pune, India.
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11
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Patil V, Hernandez-Franco JF, HogenEsch H, Renukaradhya GJ. Alpha-D-glucan-based vaccine adjuvants: Current status and future perspectives. Front Immunol 2022; 13:858321. [PMID: 36119085 PMCID: PMC9471374 DOI: 10.3389/fimmu.2022.858321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 07/26/2022] [Indexed: 11/13/2022] Open
Abstract
Nanoparticles (NPs) are increasingly used as efficient vaccine antigen-delivery platforms and vaccine adjuvants. Alpha (α)-D-glucans are polysaccharide polymers found in plants, animals, and microbes. Phytoglycogen (PG) is a densely branched dendrimer-like α-D-glucan that forms nanoparticle structures. Two simple chemical modifications of corn-derived PG create positively charged, amphiphilic nanoparticles, known as Nano-11, that stimulate immune responses when used as vaccine adjuvant in a variety of species. Nano-11 is a versatile adjuvant that can be used for alternative routes of vaccination and in combination with other immunostimulatory molecules. This review discusses our current understanding of the mechanism of action of Nano-11 and its future potential applications in animal vaccines.
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Affiliation(s)
- Veerupaxagouda Patil
- Center for Food Animal Health, Ohio Agricultural Research and Development Center, Wooster, OH, United States
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Juan F. Hernandez-Franco
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, United States
| | - Harm HogenEsch
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, United States
- *Correspondence: Harm HogenEsch, ; Gourapura J. Renukaradhya,
| | - Gourapura J. Renukaradhya
- Center for Food Animal Health, Ohio Agricultural Research and Development Center, Wooster, OH, United States
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
- *Correspondence: Harm HogenEsch, ; Gourapura J. Renukaradhya,
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12
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Rastall RA, Diez-Municio M, Forssten SD, Hamaker B, Meynier A, Moreno FJ, Respondek F, Stah B, Venema K, Wiese M. Structure and function of non-digestible carbohydrates in the gut microbiome. Benef Microbes 2022; 13:95-168. [PMID: 35729770 DOI: 10.3920/bm2021.0090] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Together with proteins and fats, carbohydrates are one of the macronutrients in the human diet. Digestible carbohydrates, such as starch, starch-based products, sucrose, lactose, glucose and some sugar alcohols and unusual (and fairly rare) α-linked glucans, directly provide us with energy while other carbohydrates including high molecular weight polysaccharides, mainly from plant cell walls, provide us with dietary fibre. Carbohydrates which are efficiently digested in the small intestine are not available in appreciable quantities to act as substrates for gut bacteria. Some oligo- and polysaccharides, many of which are also dietary fibres, are resistant to digestion in the small intestines and enter the colon where they provide substrates for the complex bacterial ecosystem that resides there. This review will focus on these non-digestible carbohydrates (NDC) and examine their impact on the gut microbiota and their physiological impact. Of particular focus will be the potential of non-digestible carbohydrates to act as prebiotics, but the review will also evaluate direct effects of NDC on human cells and systems.
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Affiliation(s)
- R A Rastall
- Department of Food and Nutritional Sciences, The University of Reading, P.O. Box 226, Whiteknights, Reading, RG6 6AP, United Kingdom
| | - M Diez-Municio
- Instituto de Investigación en Ciencias de la Alimentación, CIAL (CSIC-UAM), CEI (UAM+CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - S D Forssten
- IFF Health & Biosciences, Sokeritehtaantie 20, 02460 Kantvik, Finland
| | - B Hamaker
- Whistler Center for Carbohydrate Research, Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907-2009, USA
| | - A Meynier
- Nutrition Research, Mondelez France R&D SAS, 6 rue René Razel, 91400 Saclay, France
| | - F Javier Moreno
- Instituto de Investigación en Ciencias de la Alimentación, CIAL (CSIC-UAM), CEI (UAM+CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain
| | - F Respondek
- Tereos, Zoning Industriel Portuaire, 67390 Marckolsheim, France
| | - B Stah
- Human Milk Research & Analytical Science, Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, the Netherlands.,Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, the Netherlands
| | - K Venema
- Centre for Healthy Eating & Food Innovation (HEFI), Maastricht University - campus Venlo, St. Jansweg 20, 5928 RC Venlo, the Netherlands
| | - M Wiese
- Department of Microbiology and Systems Biology, TNO, Utrechtseweg 48, 3704 HE, Zeist, the Netherlands
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13
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Transcriptional Network in Colletotrichum gloeosporioides Mutants Lacking Msb2 or Msb2 and Sho1. J Fungi (Basel) 2022; 8:jof8020207. [PMID: 35205961 PMCID: PMC8878819 DOI: 10.3390/jof8020207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/15/2022] [Accepted: 02/19/2022] [Indexed: 02/05/2023] Open
Abstract
Colletotrichum gloeosporioides is a hemibiotrophic ascomycetous fungus that causes anthracnose in many plants worldwide. During infections, C. gloeosporioides produces an appressorium in response to various plant surface signals. However, the mechanism mediating host surface signal recognition remains unclear. In this study, C. gloeosporioides ΔCgMsb2 and ΔCgMsb2Sho1 mutants lacking hypothetical sensors of plant surface signals were examined. The mutations in ΔCgMsb2 and ΔCgMsb2Sho1 adversely affected conidial size and sporulation, while also inhibiting growth. Significant transcriptional changes were detected for nearly 19% and 26% of the genes in ΔCgMsb2 and ΔCgMsb2Sho1, respectively. The lack of these plasma membrane receptors altered the expression of specific genes, especially those encoding hydrolases, ABC transporters, and mitogen-activated protein kinases (MAPKs). The encoded MAPKs participate in the signal transduction of ERK and JNK signaling pathways, activate downstream signals, and contribute to metabolic regulation. Our data demonstrate that the C. gloeosporioides membrane proteins Msb2 and Sho1 affect gene regulation, thereby influencing conidial growth, metabolism, and development. These findings provide new insights into the regulation of C. gloeosporioides's development and infection of plant hosts.
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14
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Lima CN, Oliveira WF, Silva PMM, Filho PEC, Juul-Madsen K, Moura P, Vorup-Jensen T, Fontes A. Mannose-binding lectin conjugated to quantum dots as fluorescent nanotools for carbohydrate tracing. Methods Appl Fluoresc 2022; 10. [PMID: 35145049 DOI: 10.1088/2050-6120/ac4e72] [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: 10/04/2021] [Accepted: 01/24/2022] [Indexed: 11/11/2022]
Abstract
Quantum dots (QDs) have stood out as nanotools for glycobiology due to their photostability and ability to be combined with lectins. Mannose-binding lectin (MBL) is involved in the innate immune system and plays important roles in the activation of the complement cascade, opsonization, and elimination of apoptotic and microbial cells. Herein, adsorption and covalent coupling strategies were evaluated to conjugate QDs to a recombinant human MBL (rhMBL). The most efficient nanoprobe was selected by evaluating the conjugate ability to labelCandida albicansyeasts by flow cytometry. The QDs-rhMBL conjugate obtained by adsorption at pH 6.0 was the most efficient, labelingca.100% of cells with the highest median fluorescence intensity. The conjugation was also supported by Fourier transform infrared spectroscopy, zeta potential, and size analyses.C. albicanslabeling was calcium-dependent; 12% and <1% of cells were labeled in buffers without calcium and containing EDTA, respectively. The conjugate promoted specific labeling (based on cluster effect) since, after inhibition with mannan, there was a reduction of 80% in cell labeling, which did not occur with methyl-α-D-mannopyranoside monosaccharide. Conjugates maintained colloidal stability, bright fluorescence, and biological activity for at least 8 months. Therefore, QDs-rhMBL conjugates are promising nanotools to elucidate the roles of MBL in biological processes.
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Affiliation(s)
- Carinna N Lima
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Weslley F Oliveira
- Departament of Biochemistry, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Paloma M M Silva
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Paulo E Cabral Filho
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | - Kristian Juul-Madsen
- Biophysical Immunology Laboratory, Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Patrícia Moura
- Biological Science Institute, University of Pernambuco, Recife, Pernambuco, Brazil
| | - Thomas Vorup-Jensen
- Biophysical Immunology Laboratory, Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Adriana Fontes
- Department of Biophysics and Radiobiology, Federal University of Pernambuco, Recife, Pernambuco, Brazil
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15
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Assessment of Host Immune Responses to Fungal Pathogens. Fungal Biol 2022. [DOI: 10.1007/978-3-030-83749-5_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Gonçales RA, Salamanca AL, Júnior LR, E Silva KS, de Vasconcelos EJ, Dos Reis TF, Castro RC, C Ruy PD, Romagnoli B, Ruiz J, Pereira M, de A Soares CM, Coelho PS. In silico identification of glycosylphosphatidylinositol-anchored proteins in Paracoccidioides spp. Future Microbiol 2021; 16:589-606. [PMID: 33998266 DOI: 10.2217/fmb-2020-0282] [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: 11/21/2022] Open
Abstract
Aim: To predict glycosylphosphatidylinositol (GPI)-anchored proteins in the genome of Paracoccidioides brasiliensis and Paracoccidioides lutzii. Materials & methods: Five different bioinformatics tools were used for predicting GPI-anchored proteins; we considered as GPI-anchored proteins those detected by at least two in silico analysis methods. We also performed the proteomic analysis of P. brasiliensis cell wall by mass spectrometry. Results: Hundred GPI-anchored proteins were predicted in P. brasiliensis and P. lutzii genomes. A series of 57 proteins were classified in functional categories and 43 conserved proteins were reported with unknown functions. Four proteins identified by in silico analyses were also identified in the cell wall proteome. Conclusion: The data obtained in this study are important resources for future research of GPI-anchored proteins in Paracoccidioides spp. to identify targets for new diagnostic tools, drugs and immunological tests.
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Affiliation(s)
- Relber A Gonçales
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057, Braga, Portugal, ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Ayda Lm Salamanca
- Departamento de Bioquímica e Biologia Molecular, Instituto de Ciências Biológicas II (ICB II), Universidade Federal de Goiás (UFG), Goiânia, Goiás, 74690-900, Brazil
| | - Luiz Rb Júnior
- Department of Cellular & Molecular Biology and Pathogenic Bioagents, Faculty of Medicine of Ribeirão Preto (FMRP), University of São Paulo (USP), Ribeirão Preto, 14049-900, Brazil
| | - Kleber Sf E Silva
- Departamento de Bioquímica e Biologia Molecular, Instituto de Ciências Biológicas II (ICB II), Universidade Federal de Goiás (UFG), Goiânia, Goiás, 74690-900, Brazil
| | - Elton Jr de Vasconcelos
- College of Veterinary Medicine, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Thaila F Dos Reis
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, 14040-900, Brazil
| | - Ricardo C Castro
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, 14040-900, Brazil
| | - Patrícia de C Ruy
- Department of Cellular & Molecular Biology and Pathogenic Bioagents, Faculty of Medicine of Ribeirão Preto (FMRP), University of São Paulo (USP), Ribeirão Preto, 14049-900, Brazil
| | - Bárbara Romagnoli
- Department of Cellular & Molecular Biology and Pathogenic Bioagents, Faculty of Medicine of Ribeirão Preto (FMRP), University of São Paulo (USP), Ribeirão Preto, 14049-900, Brazil
| | - Jerônimo Ruiz
- Fundação Oswaldo Cruz, Instituto Rene Rachaou (IRR), Belo Horizonte, Minas Gerais, 30190-002, Brazil
| | - Maristela Pereira
- Departamento de Bioquímica e Biologia Molecular, Instituto de Ciências Biológicas II (ICB II), Universidade Federal de Goiás (UFG), Goiânia, Goiás, 74690-900, Brazil
| | - Célia M de A Soares
- Departamento de Bioquímica e Biologia Molecular, Instituto de Ciências Biológicas II (ICB II), Universidade Federal de Goiás (UFG), Goiânia, Goiás, 74690-900, Brazil
| | - Paulo Sr Coelho
- Department of Cellular & Molecular Biology and Pathogenic Bioagents, Faculty of Medicine of Ribeirão Preto (FMRP), University of São Paulo (USP), Ribeirão Preto, 14049-900, Brazil
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17
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Aldars-García L, Marin AC, Chaparro M, Gisbert JP. The Interplay between Immune System and Microbiota in Inflammatory Bowel Disease: A Narrative Review. Int J Mol Sci 2021; 22:ijms22063076. [PMID: 33802883 PMCID: PMC8002696 DOI: 10.3390/ijms22063076] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 12/14/2022] Open
Abstract
The importance of the gut microbiota in human health is currently well established. It contributes to many vital functions such as development of the host immune system, digestion and metabolism, barrier against pathogens or brain–gut communication. Microbial colonization occurs during infancy in parallel with maturation of the host immune system; therefore, an adequate cross-talk between these processes is essential to generating tolerance to gut microbiota early in life, which is crucial to prevent allergic and immune-mediated diseases. Inflammatory bowel disease (IBD) is characterized by an exacerbated immune reaction against intestinal microbiota. Changes in abundance in the gut of certain microorganisms such as bacteria, fungi, viruses, and archaea have been associated with IBD. Microbes that are commonly found in high abundance in healthy gut microbiomes, such as F. prausnitzii or R. hominis, are reduced in IBD patients. E. coli, which is usually present in a healthy gut in very low concentrations, is increased in the gut of IBD patients. Microbial taxa influence the immune system, hence affecting the inflammatory status of the host. This review examines the IBD microbiome profile and presents IBD as a model of dysbiosis.
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Affiliation(s)
- Laila Aldars-García
- Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid (UAM), 28006 Madrid, Spain; (A.C.M.); (M.C.); (J.P.G.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), 28006 Madrid, Spain
- Correspondence:
| | - Alicia C. Marin
- Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid (UAM), 28006 Madrid, Spain; (A.C.M.); (M.C.); (J.P.G.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), 28006 Madrid, Spain
| | - María Chaparro
- Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid (UAM), 28006 Madrid, Spain; (A.C.M.); (M.C.); (J.P.G.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), 28006 Madrid, Spain
| | - Javier P. Gisbert
- Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid (UAM), 28006 Madrid, Spain; (A.C.M.); (M.C.); (J.P.G.)
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), 28006 Madrid, Spain
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18
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Suzuki T, Kato Y, Kobayashi A, Suzuki K. Protective effects of aqueous extracts of Rhizopus oryzae on atopic dermatitis in NC/Nga mice. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2021. [DOI: 10.3136/fstr.27.725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Yukiko Kato
- School of Veterinary Medicine, Azabu University
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19
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Madan K, Madan M, Sharma S, Paliwal S. Chitinases: Therapeutic Scaffolds for Allergy and Inflammation. ACTA ACUST UNITED AC 2020; 14:46-57. [PMID: 31934842 PMCID: PMC7509760 DOI: 10.2174/1872213x14666200114184054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/19/2019] [Accepted: 12/10/2019] [Indexed: 11/25/2022]
Abstract
Background: Chitinases are the evolutionary conserved glycosidic enzymes that are characterized by their ability to cleave the naturally abundant polysaccharide chitin. The potential role of chitinases has been identified in the manifestation of various allergies and inflammatory diseases. In recent years, chitinases inhibitors are emerging as an alluring area of interest for the researchers and scientists and there is a dire need for the development of potential and safe chitinase antagonists for the prophylaxis and treatment of several diseases. Objective: The present review expedites the role of chitinases and their inhibitors in inflammation and related disorders. Methods: At first, an exhaustive survey of literature and various patents available related to chitinases were carried out. Useful information on chitinases and their inhibitor was gathered from the authentic scientific databases namely SCOPUS, EMBASE, PUBMED, GOOGLE SCHOLAR, MEDLINE, EMBASE, EBSCO, WEB OF SCIENCE, etc. This information was further analyzed and compiled up to prepare the framework of the review article. The search strategy was conducted by using queries with key terms “ chitin”, “chitinase”, “chitotrisidase”, “acidic mammalian chitinase”, “chitinase inhibitors”, “asthma” and “chitinases associated inflammatory disorders”, etc. The patents were searched using the key terms “chitinases and uses thereof”, “chitinase inhibitors”, “chitin-chitinase associated pathological disorders” etc. from www.google.com/patents, www.freepatentsonline.com, and www.scopus.com. Results: The present review provides a vision for apprehending human chitinases and their participation in several diseases. The patents available also signify the extended role and effectiveness of chitinase inhibitors in the prevention and treatment of various diseases viz. asthma, acute and chronic inflammatory diseases, autoimmune diseases, dental diseases, neurologic diseases, metabolic diseases, liver diseases, polycystic ovary syndrome, endometriosis, and cancer. In this regard, extensive pre-clinical and clinical investigations are required to develop some novel, potent and selective drug molecules for the treatment of various inflammatory diseases, allergies and cancers in the foreseeable future. Conclusion: In conclusion, chitinases can be used as potential biomarkers in prognosis and diagnosis of several inflammatory diseases and allergies and the design of novel chitinase inhibitors may act as key and rational scaffolds in designing some novel therapeutic agents in the treatment of variety of inflammatory diseases.
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Affiliation(s)
- Kirtika Madan
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan-304022, India
| | - Mansi Madan
- Dr. Ulhas Patil Medical College and Hospital, Jalgaon- 425309, Maharashtra, India
| | - Swapnil Sharma
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan-304022, India
| | - Sarvesh Paliwal
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan-304022, India
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20
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Ganeshkumar A, Suvaithenamudhan S, Rajaram R. In Vitro and In Silico Analysis of Ascorbic Acid Towards Lanosterol 14-α-Demethylase Enzyme of Fluconazole-Resistant Candida albicans. Curr Microbiol 2020; 78:292-302. [PMID: 33170381 DOI: 10.1007/s00284-020-02269-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 10/22/2020] [Indexed: 12/11/2022]
Abstract
Antibiotic resistance is one of the major concerns and the biggest threats to the world population. The incidents of antibiotic resistance in Candida spp. were frequently recorded. In the present investigation, antifungal potential of ascorbic acid (AA) was evaluated. According to the in vitro analysis, the zone of inhibition of AA (24.75 ± 0.35 mm) against C. albicans was greater as compared to other vitamins tested. AA significantly modulate the growth of C. albicans at 25 mg/ml. The highest percentage (94.67%) of cell viability was observed in untreated cells, and low cell viability (29.36%) was observed in cells treated with 50 mg/ml of AA (2 × MIC). Further, AO/EB (acridine orange/ethidium bromide), propidium iodide staining, and real-time qPCR confirmed the loss of membrane integrity due to membrane lesions that caused cell death. Lanosterol 14-α-demethylase (L-14α-DM) is the product of ERG11 and acted as superior drug target of C. albicans. Molecular docking analysis confirmed that active interaction of ascorbic acid with L-14α-DM. Based on the present investigation, the efficiency of AA was effectively proved through the in vitro and in silico analysis. This finding has evidenced the effectiveness of AA as a potential candidate against C. albicans.
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Affiliation(s)
- Arumugam Ganeshkumar
- DNA Barcoding and Marine Genomics Laboratory, Department of Marine Science, Bharathidasan University, Tiruchchirappalli, Tamil Nadu, 620 024, India
| | - Suvaiyarasan Suvaithenamudhan
- Department of Bioinformatics, School of Life Sciences, Bharathidasan University, Tiruchchirappalli, Tamil Nadu, 620 024, India
| | - Rajendran Rajaram
- DNA Barcoding and Marine Genomics Laboratory, Department of Marine Science, Bharathidasan University, Tiruchchirappalli, Tamil Nadu, 620 024, India.
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21
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Gaylord EA, Choy HL, Doering TL. Dangerous Liaisons: Interactions of Cryptococcus neoformans with Host Phagocytes. Pathogens 2020; 9:E891. [PMID: 33121050 PMCID: PMC7692806 DOI: 10.3390/pathogens9110891] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/22/2020] [Accepted: 10/25/2020] [Indexed: 02/07/2023] Open
Abstract
Cryptococcus neoformans is an opportunistic fungal pathogen and a leading cause of death in immunocompromised individuals. The interactions of this yeast with host phagocytes are critical to disease outcome, and C. neoformans is equipped with an array of factors to modulate these processes. Cryptococcal infection begins with the deposition of infectious particles into the lungs, where the fungal cells deploy various antiphagocytic factors to resist internalization by host cells. If the cryptococci are still engulfed, they can survive and proliferate within host cells by modulating the phagolysosome environment in which they reside. Lastly, cryptococcal cells may escape from phagocytes by host cell lysis, nonlytic exocytosis, or lateral cell-to-cell transfer. The interactions between C. neoformans and host phagocytes also influence the dissemination of this pathogen to the brain, where it may cross the blood-brain barrier and cause an often-fatal meningoencephalitis. In this review, we highlight key cryptococcal factors involved in various stages of cryptococcal-host interaction and pathogenesis.
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Affiliation(s)
| | | | - Tamara L. Doering
- Department of Molecular Microbiology, Washington University School of Medicine, Saint Louis, MO 63110, USA; (E.A.G.); (H.L.C.)
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22
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Jannuzzi GP, de Almeida JRF, Paulo LNM, de Almeida SR, Ferreira KS. Intracellular PRRs Activation in Targeting the Immune Response Against Fungal Infections. Front Cell Infect Microbiol 2020; 10:591970. [PMID: 33194839 PMCID: PMC7606298 DOI: 10.3389/fcimb.2020.591970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 09/04/2020] [Indexed: 12/01/2022] Open
Abstract
The immune response against fungal infections is complex and exhibits several factors involving innate elements that participate in the interaction with the fungus. The innate immune system developed pattern recognition receptors that recognize different pathogen-associated molecular patterns present both on the surface of the fungi cell wall and on their genetic material. These receptors have the function of activating the innate immune response and regulating a subsequent adaptive immune response. Among pattern recognition receptors, the family of Toll-like receptors and C-type lectin receptors are the best described and characterized, they act directly in the recognition of pathogen-associated molecular patterns expressed on the wall of the fungus and consequently in directing the immune response. In recent years, the role of intracellular pattern recognition receptors (TLR3, TLR7, TLR8, and TLR9) has become increasingly important in the pathophysiology of some mycoses, as paracoccidioidomycosis, cryptococcosis, aspergillosis, and candidiasis. The recognition of nucleic acids performed by these receptors can be essential for the control of some fungal infections, as they can be harmful to others. Therefore, this review focuses on highlighting the role played by intracellular pattern recognition receptors both in controlling the infection and in the host's susceptibility against the main fungi of medical relevance.
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Affiliation(s)
- Grasielle Pereira Jannuzzi
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | | | - Larissa Neves Monteiro Paulo
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | - Sandro Rogério de Almeida
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | - Karen Spadari Ferreira
- Departamento de Ciências Biológicas do Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, Brazil
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EphA2 Is a Neutrophil Receptor for Candida albicans that Stimulates Antifungal Activity during Oropharyngeal Infection. Cell Rep 2020; 28:423-433.e5. [PMID: 31291578 PMCID: PMC6638578 DOI: 10.1016/j.celrep.2019.06.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 05/03/2019] [Accepted: 06/05/2019] [Indexed: 12/23/2022] Open
Abstract
During oropharyngeal candidiasis (OPC), Candida albicans proliferates and invades the superficial oral epithelium. Ephrin type-A receptor 2 (EphA2) functions as an oral epithelial cell β-glucan receptor that triggers the production of proinflammatory mediators in response to fungal infection. Because EphA2 is also expressed by neutrophils, we investigated its role in neutrophil candidacidal activity during OPC. We found that EphA2 on stromal cells is required for the accumulation of phagocytes in the oral mucosa of mice with OPC. EphA2 on neutrophils is also central to host defense against OPC. The interaction of neutrophil EphA2 with serum- opsonized C. albicans yeast activates the MEK-ERK signaling pathway, leading to NADPH subunit p47phox site-specific phospho-priming. This priming increases intracellular reactive oxygen species production and enhances fungal killing. Thus, in neutrophils, EphA2 serves as a receptor for β-glucans that augments Fcγ receptor-mediated antifungal activity and controls early fungal proliferation during OPC. In oral epithelial cells, EphA2 functions as a β-glucan receptor that triggers the production of proinflammatory mediators in response to oropharyngeal candidiasis. Here, Swidergall et al. show that, in neutrophils, EphA2 recognition of β-glucans augments Fcγ receptor-mediated antifungal activity and prevents fungal proliferation during the initiation of oropharyngeal infection.
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Opportunistic Cryptococcal Antigenemia in the HAART Era at HIV Epidemic Settings of Northwest Ethiopia. CANADIAN JOURNAL OF INFECTIOUS DISEASES & MEDICAL MICROBIOLOGY 2020; 2020:5017120. [PMID: 32963654 PMCID: PMC7492940 DOI: 10.1155/2020/5017120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/23/2020] [Accepted: 08/28/2020] [Indexed: 11/20/2022]
Abstract
Background Cryptococcus neoformans is a frequent opportunistic infection in patients with the acquired immunodeficiency syndrome. While the advent of ART reduces the occurrence of cryptococcal meningitis in HIV patients, cryptococcal disease remains a leading cause of morbidity and mortality in the developing world especially in sub-Saharan Africa which is the epicenter of HIV. This study aimed to assess the cryptococcal antigenemia, CD4+ Th cell counts, HIV RNA viral load, and clinical presentations among HIV-positive patients in Northwest Ethiopia. Method A total of two hundred (200) HIV-positive patients were recruited for this study. Cryptococcus antigenemia prevalence in plasma samples of HIV‐positive patients was determined by using Antigen lateral flow assay (CrAg‐LFA) also, and CD4+ Th cell counts and HIV‐RNA levels were quantified from blood specimen. Patients' demographic data, clinical manifestation, and concurrent opportunistic infection were recorded. Result The sex distributions of study participants were 105(52.5%) male and 94(47.5%) female with an age range of 15–65 (mean 39.42 ± 9) years. All patients had a CD4+ T-cell count <100 cells/µl with the median 54 cells/μl and median HIV-RNA viral load 2.16 × 105 RNA copies/ml (50–3.66 × 105 RNA copies/ml); the prevalence of cryptococcal antigenemia was found to be 4% in HIV-positive patients. More than half and two third of CrAg‐positive patients had a CD4 count <25 cells/μl and HIV viral load >10,000 copies/ml, respectively, as well; Tuberculosis, Candidiasis, and herpes zoster are the most often observed concurrent infections while cryptococcal antigenemia is significantly associated with oral candidiasis (p < 0.001). Conclusion Although the advent of ART, early diagnosis of cryptococcosis, and application of antifungal interventions, HIV-induced cryptococcal antigenemia positivity in HIV infected individuals is still the countries' big challenge. Thus, stringent follow-up and case management should be considered.
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Differences in fungal immune recognition by monocytes and macrophages: N-mannan can be a shield or activator of immune recognition. ACTA ACUST UNITED AC 2020; 6:100042. [PMID: 33364531 PMCID: PMC7750734 DOI: 10.1016/j.tcsw.2020.100042] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/08/2020] [Accepted: 07/08/2020] [Indexed: 02/08/2023]
Abstract
Cytokine response to N-mannan mutants was dependent on the immune cell type used. N-mannan mutants stimulated less cytokines from monocytes but more from macrophages. N-mannan can therefore act as both an immune agonist or an immune shield.
We designed experiments to assess whether fungal cell wall mannans function as an immune shield or an immune agonist. Fungal cell wall β-(1,3)-glucan normally plays a major and dominant role in immune activation. The outer mannan layer has been variously described as an immune shield, because it has the potential to mask the underlying β-(1,3)-glucan, or an immune activator, as it also has the potential to engage with a wide range of mannose detecting PRRs. To resolve this conundrum we examined species-specific differences in host immune recognition in the och1Δ N-mannosylation-deficient mutant background in four species of yeast-like fungi. Irrespective of the fungal species, the cytokine response (TNFα and IL-6) induced by the och1Δ mutants in human monocytes was reduced compared to that of the wild type. In contrast, TNFα production induced by och1Δ was increased, relative to wild type, due to increased β-glucan exposure, when mouse or human macrophages were used. These observations suggest that N-mannan is not a major PAMP for macrophages and that in these cells mannan does shield the fungus from recognition of the inner cell wall β-glucan. However, N-mannan is a significant inducer of cytokine for monocytes. Therefore the metaphor of the fungal “mannan shield” can only be applied to some, but not all, myeloid cells used in immune profiling experiments of fungal species.
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Yoon SY, Kang SK, Lee HB, Oh SH, Kim WS, Li HS, Bok JD, Cho CS, Choi YJ. Enhanced Efficacy of Immunization with a Foot-and-Mouth Disease Multi-Epitope Subunit Vaccine Using Mannan-Decorated Inulin Microparticles. Tissue Eng Regen Med 2020; 17:33-44. [PMID: 32002844 PMCID: PMC6992806 DOI: 10.1007/s13770-019-00228-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/25/2019] [Accepted: 11/01/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Despite the many advantages of recombinant subunit vaccines, they have critical weaknesses that include a low efficacy for promoting cellular and humoral immune responses against antigens because of their poor immunogenicity, and a rapidly cleared properties as a result of proteolytic enzymes in the body. To circumvent these problems, we developed mannan-decorated inulin acetate microparticles (M-IA MPs) that functioned as carriers and adjuvants for immunization with the recombinant foot-and-mouth disease multi-epitope subunit vaccine (M5BT). METHODS The M5BT-loaded M-IA MPs were obtained by a double-emulsion solvent-evaporation method. Their properties including morphology, size and release ability were determined by field emission scanning electron microscope, dynamic light-scattering spectrophotometer and spectrophotometer. To assess the immunization efficacy of the MPs, mice were immunized with MPs and their sera were analyzed by ELISA. RESULTS The M-IA MPs obtained by a double-emulsion solvent-evaporation method were spherical and approximately 2-3 µm, and M5BT was encapsulated in the M-IA MPs. The M5BT-loaded M-IA MPs showed higher antigen-specific IgG, IgG1, IgG2a and anti-FMDV antibodies than the M5BT-loaded IA MPs and the Freund's adjuvant as a control. CONCLUSION The M-IA MPs showed a powerful and multifunctional polymeric system that combined two toll-like receptor agonists compared to the conventional adjuvant.
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Affiliation(s)
- So-Yeon Yoon
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Sang-Kee Kang
- Institute of Green-Bio Science and Technology, Seoul National University, 1447 Pyeongchang-daero, Daehwa-myeon, Pyeongchang-Gun, Gangwon-do, 25354, Republic of Korea
| | - Ho-Bin Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Seo-Ho Oh
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Whee-Soo Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hui-Shan Li
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Jin-Duck Bok
- Institute of Green-Bio Science and Technology, Seoul National University, 1447 Pyeongchang-daero, Daehwa-myeon, Pyeongchang-Gun, Gangwon-do, 25354, Republic of Korea
| | - Chong-Su Cho
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
| | - Yun-Jaie Choi
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
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Inflammatory bowel disease - one entity with many molecular faces. GASTROENTEROLOGY REVIEW 2019; 14:228-232. [PMID: 31988668 PMCID: PMC6983764 DOI: 10.5114/pg.2019.90249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 02/14/2019] [Indexed: 01/06/2023]
Abstract
Inflammatory bowel disease (IBD) is a heterogenous group of chronic inflammations in the gastrointestinal tract, which traditionally consists of two types: Crohn’s disease and ulcerative colitis. They differ when it comes to clinical, endoscopic, and histopathological changes. The exact aetiology of IBD has not been fully comprehended, but what is known so far is that the aetiopathogenesis of the disease is compound. Many articles have been written on the cellular/molecular background of IBD. Based on various molecular pathways, new forms of the disease have been discovered, including very early-onset IBD (VEO-IBD) or IBD coexisting with primary sclerosing cholangitis. The aim of this article is to present the molecular mechanisms leading to IBD, focusing on new forms of this disorder.
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Chukwuanukwu RC, Uchenna N, Mbagwu SI, Chukwuanukwu TO, Charles O. Cryptococcus neoformans seropositivity and some haematological parameters in HIV seropositive subjects. J Infect Public Health 2019; 13:1042-1046. [PMID: 31831399 DOI: 10.1016/j.jiph.2019.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 01/20/2019] [Accepted: 10/03/2019] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND Cryptococcus neoformans is an opportunistic fungal pathogen that causes meningitis worldwide and may be fatal in immunocompromised subjects. In Nigeria, cases have been reported with prevalence between 4 and 13.1% in Human Immunodeficiency virus (HIV) patients depending on the study subjects. This study was designed to assess the prevalence of cryptococcosis, CD4+T cell counts and possible effect on haematological parameters in HIV seropositive subject in Nnewi, South-Eastern Nigeria. METHOD A total of four hundred and twenty-nine (429) subjects were recruited for the study. Of these, two hundred and ninety (290) were HIV positive and one hundred and thirty-nine (139) were HIV seronegative subjects recruited from the voluntary counseling and testing (VCT) unit and HIV care clinic at Nnamdi Azikiwe University Teaching Hospital Nnewi, Anambra State, Nigeria. Their ages were between 18-80 years. One hundred and thirty nine (139) apparently healthy HIV seronegative subjects were recruited as controls. Blood samples were taken for C. neoformans by Antigen lateral flow assay (CrAgLFA), HIV testing, CD4+T cell, platelet and Full blood count (FBC). RESULTS Our results show that of the two hundred and ninety (290) who were HIV positive subjects investigated for cryptococcosis, 4 (1.4%) tested positive for CrAg of whom 1(25%) were male and 3(75%) were female. All those with cryptococcosis had their CD4 count below 200 cells/μL, three of them were on ART and one was not. There were significant differences in the CD4 counts (P<0.05) between those infected and not infected with C. neoformans. None of the control group tested positive to cryptococcosis. CONCLUSION Widespread use of anti-retroviral therapy may have reduced C. neoformans infection. However, the threat remains and there may be a possibility that women may be a more vulnerable population.
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Affiliation(s)
- Rebecca C Chukwuanukwu
- Department of Medical Laboratory Science, Nnamdi Azikiwe University, Nnewi Campus, Nigeria.
| | - Nkemjika Uchenna
- Department of Hematology, Nnamdi Azikiwe University Teaching Hospital, Nnewi, Nigeria
| | - Smart I Mbagwu
- Department of Anatomy, Nnamdi Azikiwe University, Nnewi Campus, Nigeria
| | | | - Onyenekwe Charles
- Department of Medical Laboratory Science, Nnamdi Azikiwe University, Nnewi Campus, Nigeria
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Chang CC, Levitz SM. Fungal immunology in clinical practice: Magical realism or practical reality? Med Mycol 2019; 57:S294-S306. [PMID: 31292656 DOI: 10.1093/mmy/myy165] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 12/21/2018] [Accepted: 01/28/2019] [Indexed: 12/15/2022] Open
Abstract
Invasive fungal infections (IFIs) occur predominantly in immunocompromised individuals but can also be seen in previously well persons. The human innate immune system recognizes key components of the fungal cell wall as foreign resulting in a myriad of signaling cascades. This triggers release of antifungal molecules as well as adaptive immune responses, which kill or at least contain the invading fungi. However, these defences may fail in hosts with primary or secondary immunodeficiencies resulting in IFIs. Knowledge of a patient's immune status enables the clinician to predict the fungal infections most likely to occur. Moreover, the occurrence of an opportunistic mycosis in a patient without known immunocompromise usually should prompt a search for an occult immune defect. A rapidly expanding number of primary and secondary immunodeficiencies associated with mycoses has been identified. An investigative approach to determining the nature of these immunodeficiencies is suggested to help guide clinicians encountering patients with IFI. Finally, promising adjunctive immunotherapy measures are currently being investigated in IFI.
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Affiliation(s)
- Christina C Chang
- Department of Infectious Diseases, Alfred Hospital and Monash University, Melbourne, Australia
| | - Stuart M Levitz
- Department of Medicine, Division of Infectious Diseases and Immunology, University of Massachusetts Medical School, Worcester, Massachusetts, United States
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Lampugnani ER, Flores-Sandoval E, Tan QW, Mutwil M, Bowman JL, Persson S. Cellulose Synthesis - Central Components and Their Evolutionary Relationships. TRENDS IN PLANT SCIENCE 2019; 24:402-412. [PMID: 30905522 DOI: 10.1016/j.tplants.2019.02.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 02/13/2019] [Accepted: 02/21/2019] [Indexed: 05/20/2023]
Abstract
Cellulose is an essential morphogenic polysaccharide that is central to the stability of plant cell walls and provides an important raw material for a range of plant-based fiber and fuel industries. The past decade has seen a substantial rise in the identification of cellulose synthesis-related components and in our understanding of how these components function. Much of this research has been conducted in Arabidopsis thaliana (arabidopsis); however, it has become increasingly evident that many of the components and their functions are conserved. We provide here an overview of cellulose synthesis 'core' components. The evolution and coexpression patterns of these components provide important insight into how cellulose synthesis evolved and the potential for the components to work as functional units during cellulose production.
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Affiliation(s)
- Edwin R Lampugnani
- School of Biosciences, University of Melbourne, Parkville, VIC 3010, Australia
| | | | - Qiao Wen Tan
- School of Biological Sciences, Nanyang Technological University, Singapore
| | - Marek Mutwil
- School of Biological Sciences, Nanyang Technological University, Singapore
| | - John L Bowman
- School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia
| | - Staffan Persson
- School of Biosciences, University of Melbourne, Parkville, VIC 3010, Australia.
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In vitro activation and maturation of human mononuclear phagocytes by stimulation with liposomes coated with a neoglycolipid containing α1–3, α1–6-mannotriose. Glycoconj J 2019; 36:185-197. [DOI: 10.1007/s10719-019-09870-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/28/2019] [Accepted: 04/04/2019] [Indexed: 01/22/2023]
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Mirkov I, Popov Aleksandrov A, Lazovic B, Glamoclija J, Kataranovski M. Usefulness of animal models of aspergillosis in studying immunity against Aspergillus infections. J Mycol Med 2019; 29:84-96. [DOI: 10.1016/j.mycmed.2019.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 11/28/2018] [Accepted: 01/14/2019] [Indexed: 01/08/2023]
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MaPmt4, a protein O-mannosyltransferase, contributes to cell wall integrity, stress tolerance and virulence in Metarhizium acridum. Curr Genet 2019; 65:1025-1040. [DOI: 10.1007/s00294-019-00957-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/04/2019] [Accepted: 03/16/2019] [Indexed: 12/23/2022]
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Pérez-Arques C, Navarro-Mendoza MI, Murcia L, Lax C, Martínez-García P, Heitman J, Nicolás FE, Garre V. Mucor circinelloides Thrives inside the Phagosome through an Atf-Mediated Germination Pathway. mBio 2019; 10:e02765-18. [PMID: 30723131 PMCID: PMC6428757 DOI: 10.1128/mbio.02765-18] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 12/17/2018] [Indexed: 11/20/2022] Open
Abstract
Mucormycosis is an emerging fungal infection that is often lethal due to the ineffectiveness of current therapies. Here, we have studied the first stage of this infection-the germination of Mucor circinelloides spores inside phagocytic cells-from an integrated transcriptomic and functional perspective. A relevant fungal gene network is remodeled in response to phagocytosis, being enriched in crucial functions to survive and germinate inside the phagosome, such as nutritional adaptation and response to oxidative stress. Correspondingly, the phagocytic cells induced a specific proinflammatory and apoptotic response to the pathogenic strain. Deletion of fungal genes encoding putative transcription factors (atf1, atf2, and gcn4), extracellular proteins (chi1 and pps1), and an aquaporin (aqp1) revealed that these genes perform important roles in survival following phagocytosis, germination inside the phagosome, and virulence in mice. atf1 and atf2 play a major role in these pathogenic processes, since their mutants showed the strongest phenotypes and both genes control a complex gene network of secondarily regulated genes, including chi1 and aqp1 These new insights into the initial phase of mucormycosis define genetic regulators and molecular processes that could serve as pharmacological targets.IMPORTANCE Mucorales are a group of ancient saprophytic fungi that cause neglected infectious diseases collectively known as mucormycoses. The molecular processes underlying the establishment and progression of this disease are largely unknown. Our work presents a transcriptomic study to unveil the Mucor circinelloides genetic network triggered in fungal spores in response to phagocytosis by macrophages and the transcriptional response of the host cells. Functional characterization of differentially expressed fungal genes revealed three transcription factors and three extracellular proteins essential for the fungus to survive and germinate inside the phagosome and to cause disease in mice. Two of the transcription factors, highly similar to activating transcription factors (ATFs), coordinate a complex secondary gene response involved in pathogenesis. The significance of our research is in characterizing the initial stages that lead to evasion of the host innate immune response and, in consequence, the dissemination of the infection. This genetic study offers possible targets for novel antifungal drugs against these opportunistic human pathogens.
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Affiliation(s)
- Carlos Pérez-Arques
- Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain
| | | | - Laura Murcia
- Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain
| | - Carlos Lax
- Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain
| | | | - Joseph Heitman
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Francisco E Nicolás
- Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain
| | - Victoriano Garre
- Departamento de Genética y Microbiología, Universidad de Murcia, Murcia, Spain
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Imai T, Inoue R, Kawada Y, Morita Y, Inatomi O, Nishida A, Bamba S, Kawahara M, Andoh A. Characterization of fungal dysbiosis in Japanese patients with inflammatory bowel disease. J Gastroenterol 2019; 54:149-159. [PMID: 30478724 DOI: 10.1007/s00535-018-1530-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 11/19/2018] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND AIMS There are no previous reports describing the fecal fungal microbiome of a Japanese population using advanced molecular techniques. In this study, we performed a molecular analysis on the fungal microbial community of a healthy Japanese population and patients with inflammatory bowel diseases (IBDs). PATIENTS AND METHODS Fecal samples were obtained from 18 patients with inactive ulcerative colitis (UC, n = 18), Crohn's disease (CD, n = 20) and healthy volunteers (n = 20). Bacterial and fungal microbiome was analyzed by sequencing of 16S rRNA and the internal transcribed spacer (ITS) region, respectively. RESULTS 16S rRNA sequencing of the bacterial microbiome revealed that the α-diversity indicated by the Chao-1 and Shannon indices was significantly lower in CD patients compared to healthy controls and/or UC patients. Principal coordinate (PCo) analysis of the bacterial community revealed significant structural differences in microbiome among healthy controls, UC and CD patients (PERMANOVA P = 0.0001). ITS sequencing of the fungal microbiome indicated no significant differences in α-diversity between healthy controls and IBD patients. However, the overall structure of the fungal microbial community of CD patients was significantly different from those of healthy controls and UC patients (PERMANOVA = 0.03). At the genus level, the genus Saccharomyces was dominant and this was followed by the genus Sarocladium in healthy controls. The abundance of the genus Candida was significantly higher in CD patients than healthy controls and/or UC patients. CONCLUSION The fecal fungal microbiome of a Japanese population differed considerably from that of a Western population. We identified fungal dysbiosis in Japanese patients with IBD.
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Affiliation(s)
- Takayuki Imai
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan
| | - Ryo Inoue
- Laboratory of Animal Science, Department of Agriculture and Life Science, Kyoto Prefectural University, Kyoto, 606-8522, Japan
| | - Yuki Kawada
- Laboratory of Animal Science, Department of Agriculture and Life Science, Kyoto Prefectural University, Kyoto, 606-8522, Japan
| | - Yasuhiro Morita
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan
| | - Osamu Inatomi
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan
| | - Atsushi Nishida
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan
| | - Shigeki Bamba
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan
| | - Masahiro Kawahara
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan
| | - Akira Andoh
- Department of Medicine, Shiga University of Medical Science, Seta-Tsukinowa, Otsu, 520-2192, Japan.
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Carreras E, Velasco de Andrés M, Orta-Mascaró M, Simões IT, Català C, Zaragoza O, Lozano F. Discordant susceptibility of inbred C57BL/6 versus outbred CD1 mice to experimental fungal sepsis. Cell Microbiol 2019; 21:e12995. [PMID: 30577088 DOI: 10.1111/cmi.12995] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 12/06/2018] [Accepted: 12/11/2018] [Indexed: 01/01/2023]
Abstract
Individual susceptibility differences to fungal infection following invasive and/or immunosuppressive medical interventions are an important clinical issue. In order to explore immune response-related factors that may be linked to fungal infection susceptibility, we have compared the response of inbred C57BL/6J and outbred CD1 mouse strains to different experimental models of fungal sepsis. The challenge of animals with the zymosan-induced generalised inflammation model revealed poorer survival rates in C57BL/6J, consistent with lower Th1 cytokine interferon (IFN)-γ serum levels, compared with CD1 mice. Likewise, ex vivo exposure of C57BL/6J splenocytes to zymosan but also bacterial lipopolisaccharide or lipoteichoic acid, resulted in lower IFN-γ secretion compared with CD1 mice. C57BL/6J susceptibility could be reverted by rescue infusion of relative low IFN-γ doses (0.2 μg/kg) either alone or in combination with the ß-glucan-binding CD5 protein (0.7 mg/kg) leading to improved post zymosan-induced generalised inflammation survival. Similarly, low survival rates to systemic Candida albicans infection (2.86 × 104 CFU/gr) were ameliorated by low-dose IFN-γ infusion in C57BL/6J but not CD1 mice. Our results highlight the importance of strain choice in experimental fungal infection models and provide a susceptibility rationale for more specific antifungal immunotherapy designs.
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Affiliation(s)
- Esther Carreras
- Immunoreceptors of the Innate and Adaptive System team, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - María Velasco de Andrés
- Immunoreceptors of the Innate and Adaptive System team, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Marc Orta-Mascaró
- Immunoreceptors of the Innate and Adaptive System team, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Inês T Simões
- Immunoreceptors of the Innate and Adaptive System team, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Cristina Català
- Immunoreceptors of the Innate and Adaptive System team, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Oscar Zaragoza
- Mycology Reference Laboratory, National Centre for Microbiology, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
| | - Francisco Lozano
- Immunoreceptors of the Innate and Adaptive System team, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain.,Servei d'Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clínic de Barcelona, Barcelona, Spain.,Departament de Biomedicina, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain
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Snyder AB, Biango-Daniels MN, Hodge KT, Worobo RW. Nature Abhors a Vacuum: Highly Diverse Mechanisms Enable Spoilage Fungi to Disperse, Survive, and Propagate in Commercially Processed and Preserved Foods. Compr Rev Food Sci Food Saf 2018; 18:286-304. [DOI: 10.1111/1541-4337.12403] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/30/2018] [Accepted: 10/02/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Abigail B. Snyder
- the Dept. of Extension; The Ohio State Univ.; 1680 Madison Ave. Wooster OH 44691 USA
| | - Megan N. Biango-Daniels
- the Plant Pathology and Plant-Microbe Biology, School of Integrated Plant Science; Cornell Univ.; Ithaca NY 14850 USA
| | - Kathie T. Hodge
- the Plant Pathology and Plant-Microbe Biology, School of Integrated Plant Science; Cornell Univ.; Ithaca NY 14850 USA
| | - Randy W. Worobo
- the Dept. of Food Science; Cornell Univ.; 411 Tower Rd. Ithaca NY 14850 USA
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Zuo T, Ng SC. The Gut Microbiota in the Pathogenesis and Therapeutics of Inflammatory Bowel Disease. Front Microbiol 2018; 9:2247. [PMID: 30319571 PMCID: PMC6167487 DOI: 10.3389/fmicb.2018.02247] [Citation(s) in RCA: 356] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 09/03/2018] [Indexed: 12/12/2022] Open
Abstract
In the twenty first century, the changing epidemiology of inflammatory bowel disease (IBD) globally with increasing disease incidence across many countries relates to the altered gut microbiota, due to a combinatorial effect of environmental factors, human immune responses and genetics. IBD is a gastrointestinal disease associated with a gut microbial dysbiosis, including an expansion of facultative anaerobic bacteria of the family Enterobacteriaceae. Advances in high-throughput sequencing enable us to entangle the gut microbiota in human health and IBD beyond the gut bacterial microbiota, expanding insights into the mycobiota, virobiota and helminthes. Caudovirales (viruses) and Basidiomycota, Ascomycota, and Candida albicans (fungi) are revealed to be increased in IBD. The deconvolution of the gut microbiota in IBD lays the basis for unveiling the roles of these various gut microbiota components in IBD pathogenesis and being conductive to instructing on future IBD diagnosis and therapeutics. Here we comprehensively elucidate the alterations in the gut microbiota in IBD, discuss the effect of diets in the gut microbiota in relation to IBD, and illustrate the potential of manipulation of gut microbiota for IBD therapeutics. The therapeutic strategy of antibiotics, prebiotics, probiotics and fecal microbiota transplantation will benefit the effective application of precision microbiome manipulation in IBD.
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Affiliation(s)
- Tao Zuo
- Department of Medicine and Therapeutics, Institute of Digestive Disease, LKS Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China
- Faculty of Medicine, Center for Gut Microbiota Research, The Chinese University of Hong Kong, Hong Kong, China
| | - Siew C. Ng
- Department of Medicine and Therapeutics, Institute of Digestive Disease, LKS Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China
- Faculty of Medicine, Center for Gut Microbiota Research, The Chinese University of Hong Kong, Hong Kong, China
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Gut AM, Vasiljevic T, Yeager T, Donkor ON. Salmonella infection - prevention and treatment by antibiotics and probiotic yeasts: a review. MICROBIOLOGY-SGM 2018; 164:1327-1344. [PMID: 30136920 DOI: 10.1099/mic.0.000709] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Global Salmonella infection, especially in developing countries, is a health and economic burden. The use of antibiotic drugs in treating the infection is proving less effective due to the alarming rise of antibiotic-resistant strains of Salmonella, the effects of antibiotics on normal gut microflora and antibiotic-associated diarrhoea, all of which bring a growing need for alternative treatments, including the use of probiotic micro-organisms. However, there are issues with probiotics, including their potential to be opportunistic pathogens and antibiotic-resistant carriers, and their antibiotic susceptibility if used as complementary therapy. Clinical trials, animal trials and in vitro investigations into the prophylactic and therapeutic efficacies of probiotics have demonstrated antagonistic properties against Salmonella and other enteropathogenic bacteria. Nonetheless, there is a need for further studies into the potential mechanisms, efficacy and mode of delivery of yeast probiotics in Salmonella infections. This review discusses Salmonella infections and treatment using antibiotics and probiotics.
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Affiliation(s)
- Abraham Majak Gut
- 1Institute for Sustainable Industries and Livable Cities, College of Health and Biomedicine, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia
| | - Todor Vasiljevic
- 1Institute for Sustainable Industries and Livable Cities, College of Health and Biomedicine, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia
| | - Thomas Yeager
- 2Institute for Sustainable Industries and Livable Cities, College of Engineering and Science, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia
| | - Osaana N Donkor
- 1Institute for Sustainable Industries and Livable Cities, College of Health and Biomedicine, Victoria University, Werribee Campus, PO Box 14428, Melbourne, Victoria 8001, Australia
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Field KA, Sewall BJ, Prokkola JM, Turner GG, Gagnon MF, Lilley TM, Paul White J, Johnson JS, Hauer CL, Reeder DM. Effect of torpor on host transcriptomic responses to a fungal pathogen in hibernating bats. Mol Ecol 2018; 27:3727-3743. [PMID: 30080945 DOI: 10.1111/mec.14827] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 07/25/2018] [Accepted: 07/28/2018] [Indexed: 01/07/2023]
Abstract
Hibernation, the use of prolonged torpor to depress metabolism, is employed by mammals to conserve resources during extended periods of extreme temperatures and/or resource limitation. Mammalian hibernators arouse to euthermy periodically during torpor for reasons that are not well understood, and these arousals may facilitate immune processes. To determine whether arousals enable host responses to pathogens, we used dual RNA-Seq and a paired sampling approach to examine gene expression in a hibernating bat, the little brown myotis (Myotis lucifugus). During torpor, transcript levels differed in only a few genes between uninfected wing tissue and adjacent tissue infected with Pseudogymnoascus destructans, the fungal pathogen that causes white-nose syndrome. Within 70-80 min after emergence from torpor, large changes in gene expression were observed due to local infection, particularly in genes involved in pro-inflammatory host responses to fungal pathogens, but also in many genes involved in immune responses and metabolism. These results support the hypothesis that torpor is a period of relative immune dormancy and arousals allow for local immune responses in infected tissues during hibernation. Host-pathogen interactions were also found to regulate gene expression in the pathogen differently depending on the torpor state of the host. Hibernating species must balance the benefits of energy and water conservation achieved during torpor with the costs of decreased immune competence. Interbout arousals allow hibernators to optimize these, and other, trade-offs during prolonged hibernation by enabling host responses to pathogens within brief, periodic episodes of euthermy.
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Affiliation(s)
- Kenneth A Field
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania
| | - Brent J Sewall
- Department of Biology, Temple University, Philadelphia, Pennsylvania
| | - Jenni M Prokkola
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania
| | - Gregory G Turner
- Wildlife Diversity Division, Pennsylvania Game Commission, Harrisburg, Pennsylvania
| | - Marianne F Gagnon
- Department of Biology, Temple University, Philadelphia, Pennsylvania
| | - Thomas M Lilley
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania
| | - J Paul White
- Wisconsin Department of Natural Resources, Madison, Wisconsin
| | - Joseph S Johnson
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania
| | | | - DeeAnn M Reeder
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania
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41
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Chaliha C, Rugen MD, Field RA, Kalita E. Glycans as Modulators of Plant Defense Against Filamentous Pathogens. FRONTIERS IN PLANT SCIENCE 2018; 9:928. [PMID: 30022987 PMCID: PMC6039678 DOI: 10.3389/fpls.2018.00928] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 06/11/2018] [Indexed: 05/25/2023]
Abstract
Plants and microbes utilize glycoconjugates as structural entities, energy reserves for cellular processes, and components of cellular recognition or binding events. The structural heterogeneity of carbohydrates in such systems is a result of the ability of the carbohydrate biosynthetic enzymes to reorient sugar monomers in a variety of forms, generating highly complex, linear, branched, or hierarchical structures. During the interaction between plants and their microbial pathogens, the microbial cell surface glycans, cell wall derived glycans, and glycoproteins stimulate the signaling cascades of plant immune responses, through a series of specific or broad spectrum recognition events. The microbial glycan-induced plant immune responses and the downstream modifications observed in host-plant glycan structures that combat the microbial attack have garnered immense interest among scientists in recent times. This has been enabled by technological advancements in the field of glycobiology, making it possible to study the ongoing co-evolution of the microbial and the corresponding host glycan structures, in greater detail. The new glycan analogs emerging in this evolutionary arms race brings about a fresh perspective to our understanding of plant-pathogen interactions. This review discusses the role of diverse classes of glycans and their derivatives including simple sugars, oligosaccharides, glycoproteins, and glycolipids in relation to the activation of classical Pattern-Triggered Immunity (PTI) and Effector-Triggered Immunity (ETI) defense responses in plants. While primarily encompassing the biological roles of glycans in modulating plant defense responses, this review categorizes glycans based on their structure, thereby enabling parallels to be drawn to other areas of glycobiology. Further, we examine how these molecules are currently being used to develop new bio-active molecules, potent as priming agents to stimulate plant defense response and as templates for designing environmentally friendly foliar sprays for plant protection.
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Affiliation(s)
- Chayanika Chaliha
- Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, India
| | - Michael D. Rugen
- Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | - Robert A. Field
- Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Norwich, United Kingdom
| | - Eeshan Kalita
- Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, India
- Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Norwich, United Kingdom
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Esher SK, Ost KS, Kohlbrenner MA, Pianalto KM, Telzrow CL, Campuzano A, Nichols CB, Munro C, Wormley FL, Alspaugh JA. Defects in intracellular trafficking of fungal cell wall synthases lead to aberrant host immune recognition. PLoS Pathog 2018; 14:e1007126. [PMID: 29864141 PMCID: PMC6002136 DOI: 10.1371/journal.ppat.1007126] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 06/14/2018] [Accepted: 05/29/2018] [Indexed: 11/19/2022] Open
Abstract
The human fungal pathogen, Cryptococcus neoformans, dramatically alters its cell wall, both in size and composition, upon entering the host. This cell wall remodeling is essential for host immune avoidance by this pathogen. In a genetic screen for mutants with changes in their cell wall, we identified a novel protein, Mar1, that controls cell wall organization and immune evasion. Through phenotypic studies of a loss-of-function strain, we have demonstrated that the mar1Δ mutant has an aberrant cell surface and a defect in polysaccharide capsule attachment, resulting in attenuated virulence. Furthermore, the mar1Δ mutant displays increased staining for exposed cell wall chitin and chitosan when the cells are grown in host-like tissue culture conditions. However, HPLC analysis of whole cell walls and RT-PCR analysis of cell wall synthase genes demonstrated that this increased chitin exposure is likely due to decreased levels of glucans and mannans in the outer cell wall layers. We observed that the Mar1 protein differentially localizes to cellular membranes in a condition dependent manner, and we have further shown that the mar1Δ mutant displays defects in intracellular trafficking, resulting in a mislocalization of the β-glucan synthase catalytic subunit, Fks1. These cell surface changes influence the host-pathogen interaction, resulting in increased macrophage activation to microbial challenge in vitro. We established that several host innate immune signaling proteins are required for the observed macrophage activation, including the Card9 and MyD88 adaptor proteins, as well as the Dectin-1 and TLR2 pattern recognition receptors. These studies explore novel mechanisms by which a microbial pathogen regulates its cell surface in response to the host, as well as how dysregulation of this adaptive response leads to defective immune avoidance.
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Affiliation(s)
- Shannon K. Esher
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Kyla S. Ost
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Maria A. Kohlbrenner
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Kaila M. Pianalto
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Calla L. Telzrow
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Althea Campuzano
- Department of Biology, University of Texas at San Antonio, San Antonio, Texas, United States of America
| | - Connie B. Nichols
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
| | - Carol Munro
- MRC Centre for Medical Mycology, University of Aberdeen, Institute of Medical Sciences, Foresterhill, Aberdeen, United Kingdom
| | - Floyd L. Wormley
- Department of Biology, University of Texas at San Antonio, San Antonio, Texas, United States of America
| | - J. Andrew Alspaugh
- Departments of Molecular Genetics and Microbiology/Medicine, Duke University School of Medicine, Durham, NC, United States of America
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Agha R, Gross A, Rohrlack T, Wolinska J. Adaptation of a Chytrid Parasite to Its Cyanobacterial Host Is Hampered by Host Intraspecific Diversity. Front Microbiol 2018; 9:921. [PMID: 29867832 PMCID: PMC5952108 DOI: 10.3389/fmicb.2018.00921] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/20/2018] [Indexed: 01/08/2023] Open
Abstract
Experimental evolution can be used to test for and characterize parasite and pathogen adaptation. We undertook a serial-passage experiment in which a single parasite population of the obligate fungal (chytrid) parasite Rhizophydium megarrhizum was maintained over a period of 200 days under different mono- and multiclonal compositions of its phytoplankton host, the bloom-forming cyanobacterium Planktothrix. Despite initially inferior performance, parasite populations under sustained exposure to novel monoclonal hosts experienced rapid fitness increases evidenced by increased transmission rates. This demonstrates rapid adaptation of chytrids to novel hosts and highlights their high evolutionary potential. In contrast, increased fitness was not detected in parasites exposed to multiclonal host mixtures, indicating that cyanobacterial intraspecific diversity hampers parasites adaptation. Significant increases in intensity of infection were observed in monoclonal and multiclonal treatments, suggesting high evolvability of traits involved in parasite attachment onto hosts (i.e., encystment). A comparison of the performance of evolved and unevolved (control) parasite populations against their common ancestral host did not reveal parasite attenuation. Our results exemplify the ability of chytrid parasites to adapt rapidly to new hosts, while providing experimental evidence that genetic diversity in host populations grants increased resistance to disease by hindering parasite adaptation.
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Affiliation(s)
- Ramsy Agha
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Alina Gross
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
| | - Thomas Rohrlack
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| | - Justyna Wolinska
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
- Institute of Biology, Freie Universität Berlin, Berlin, Germany
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Garelnabi M, May RC. Variability in innate host immune responses to cryptococcosis. Mem Inst Oswaldo Cruz 2018; 113:e180060. [PMID: 29668826 PMCID: PMC5909084 DOI: 10.1590/0074-02760180060] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 03/02/2018] [Indexed: 12/22/2022] Open
Abstract
Cryptococcosis is an invasive fungal disease caused by Cryptococcus neoformans and the closely related species C. gattii. The severe form of the disease, cryptococcal meningitis (CM), is rapidly fatal without treatment. Although typically a disease of immunocompromised (especially HIV-positive) individuals, there is growing awareness of cryptococcal disease amongst non-immunocompromised patients. Whilst substantial progress has been made in understanding the pathogenicity of C. neoformans in HIV patients, prospective data on cryptococcosis outside the context of HIV remains lacking. Below we review how innate immune responses vary between hosts depending on immunological status, and discuss risk factors and predictors of disease outcome in different groups.
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Affiliation(s)
- Mariam Garelnabi
- School of Biosciences, Institute of Microbiology and Infection, University of Birmingham, Edgbaston, Birmingham, UK
| | - Robin C May
- School of Biosciences, Institute of Microbiology and Infection, University of Birmingham, Edgbaston, Birmingham, UK
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45
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Elsegeiny W, Marr KA, Williamson PR. Immunology of Cryptococcal Infections: Developing a Rational Approach to Patient Therapy. Front Immunol 2018; 9:651. [PMID: 29670625 PMCID: PMC5893745 DOI: 10.3389/fimmu.2018.00651] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 03/16/2018] [Indexed: 12/13/2022] Open
Abstract
Cryptococcal meningoencephalitis is responsible for upwards of 15% of HIV-related deaths worldwide and is currently the most common cause of non-viral meningitis in the US, affecting both previously healthy and people with immune suppression caused by cancer chemotherapy, transplantation, and biologic therapies. Despite a continued 30-50% attributable mortality, recommended therapeutic strategies have remained largely unchanged since the 1950s. Recent murine models and human studies examining the role of the immune system in both susceptibility to the infection as well as host damage have begun to influence patient care decisions. The Damage Framework Response, originally proposed in 1999, was recently used to discuss dichotomous etiologies of host damage in cryptococcal disease. These include patients suffering microbiological damage with low host immunity (especially those immunosuppressed with HIV) and those having low (live) microbiological burden but high immune-mediated damage (HIV-related immune reconstitution syndrome and non-HIV-related postinfectious inflammatory response syndrome). Cryptococcal disease in previously healthy hosts, albeit rare, has been known for a long time. Immunophenotyping and dendritic cell-T cell signaling studies on cerebral spinal fluid of these rare patients reveal immune capacity for recognition and T-cell activation pathways including increased levels of HLA-DR and CD56. However, despite effective T-cell signals, brain biopsy and autopsy specimens demonstrated an M2 alternative macrophage polarization and poor phagocytosis of fungal cells. These studies expand the paradigm for cryptococcal disease susceptibility to include a prominent role for immune-mediated damage and suggest a need for careful individual consideration of immune activation during therapy of cryptococcal disease in diverse hosts.
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Affiliation(s)
- Waleed Elsegeiny
- Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
| | | | - Peter R. Williamson
- Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, United States
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Abstract
Fungi have emerged as premier opportunistic microbes of the 21st century, having a considerable impact on human morbidity and mortality. The huge increase in incidence of these diseases is largely due to the HIV pandemic and use of immunosuppressive therapies, underscoring the importance of the immune system in defense against fungi. This article will address how the mammalian immune system recognizes and mounts a defense against medically relevant fungal species.
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47
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Tang J, Lin G, Langdon WY, Tao L, Zhang J. Regulation of C-Type Lectin Receptor-Mediated Antifungal Immunity. Front Immunol 2018; 9:123. [PMID: 29449845 PMCID: PMC5799234 DOI: 10.3389/fimmu.2018.00123] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 01/16/2018] [Indexed: 12/21/2022] Open
Abstract
Of all the pathogen recognition receptor families, C-type lectin receptor (CLR)-induced intracellular signal cascades are indispensable for the initiation and regulation of antifungal immunity. Ongoing experiments over the last decade have elicited diverse CLR functions and novel regulatory mechanisms of CLR-mediated-signaling pathways. In this review, we highlight novel insights in antifungal innate and adaptive-protective immunity mediated by CLRs and discuss the potential therapeutic strategies against fungal infection based on targeting the mediators in the host immune system.
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Affiliation(s)
- Juan Tang
- Department of Nephrology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Guoxin Lin
- Department of Pathology, The University of Iowa, Iowa City, IA, United States.,Department of Anesthesiology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Wallace Y Langdon
- School of Biological Sciences, University of Western Australia, Perth, WA, Australia
| | - Lijian Tao
- Department of Nephrology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jian Zhang
- Department of Pathology, The University of Iowa, Iowa City, IA, United States
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48
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Saccharomyces cerevisiae-Derived Mannan Does Not Alter Immune Responses to Aspergillus Allergens. BIOMED RESEARCH INTERNATIONAL 2018; 2018:3298378. [PMID: 29511677 PMCID: PMC5817814 DOI: 10.1155/2018/3298378] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 11/03/2017] [Accepted: 11/07/2017] [Indexed: 12/15/2022]
Abstract
Severe asthma with fungal sensitization predominates in the population suffering from allergic asthma, to which there is no cure. While corticosteroids are the mainstay in current treatment, other means of controlling inflammation may be beneficial. Herein, we hypothesized that mannan from Saccharomyces cerevisiae would dampen the characteristics of fungal allergic asthma by altering the pulmonary immune responses. Using wild-type and transgenic mice expressing the human mannose receptor on smooth muscle cells, we explored the outcome of mannan administration during allergen exposure on the pathogenesis of fungal asthma through measurement of cardinal features of disease such as inflammation, goblet cell number, and airway hyperresponsiveness. Mannan treatment did not alter most hallmarks of allergic airways disease in wild-type mice. Transgenic mice treated with mannan during allergen exposure had an equivalent response to non-mannan-treated allergic mice except for a prominent granulocytic influx into airways and cytokine availability. Our studies suggest no role for mannan as an inflammatory regulator during fungal allergy.
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49
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Li C, Lev S, Desmarini D, Kaufman-Francis K, Saiardi A, Silva APG, Mackay JP, Thompson PE, Sorrell TC, Djordjevic JT. IP 3-4 kinase Arg1 regulates cell wall homeostasis and surface architecture to promote clearance of Cryptococcus neoformans infection in a mouse model. Virulence 2017; 8:1833-1848. [PMID: 28976803 DOI: 10.1080/21505594.2017.1385692] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
We previously identified a series of inositol polyphosphate kinases (IPKs), Arg1, Ipk1, Kcs1 and Asp1, in the opportunistic fungal pathogen Cryptococcus neoformans. Using gene deletion analysis, we characterized Arg1, Ipk1 and Kcs1 and showed that they act sequentially to convert IP3 to PP-IP5 (IP7), a key metabolite promoting stress tolerance, metabolic adaptation and fungal dissemination to the brain. We have now directly characterized the enzymatic activity of Arg1, demonstrating that it is a dual specificity (IP3/IP4) kinase producing IP5. We showed previously that IP5 is further phosphorylated by Ipk1 to produce IP6, which is a substrate for the synthesis of PP-IP5 by Kcs1. Phenotypic comparison of the arg1Δ and kcs1Δ deletion mutants (both PP-IP5-deficient) reveals that arg1Δ has the most deleterious phenotype: while PP-IP5 is essential for metabolic and stress adaptation in both mutant strains, PP-IP5 is dispensable for virulence-associated functions such as capsule production, cell wall organization, and normal N-linked mannosylation of the virulence factor, phospholipase B1, as these phenotypes were defective only in arg1Δ. The more deleterious arg1Δ phenotype correlated with a higher rate of arg1Δ phagocytosis by human peripheral blood monocytes and rapid arg1Δ clearance from lung in a mouse model. This observation is in contrast to kcs1Δ, which we previously reported establishes a chronic, confined lung infection. In summary, we show that Arg1 is the most crucial IPK for cryptococcal virulence, conveying PP-IP5-dependent and novel PP-IP5-independent functions.
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Affiliation(s)
- Cecilia Li
- a Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research , 176 Hawkesbury road, Westmead NSW 2145 , Australia.,b Sydney Medical School-Westmead, The University of Sydney , Westmead NSW 2145 , Australia.,c Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney , NSW Australia
| | - Sophie Lev
- a Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research , 176 Hawkesbury road, Westmead NSW 2145 , Australia.,b Sydney Medical School-Westmead, The University of Sydney , Westmead NSW 2145 , Australia.,c Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney , NSW Australia
| | - Desmarini Desmarini
- a Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research , 176 Hawkesbury road, Westmead NSW 2145 , Australia
| | - Keren Kaufman-Francis
- a Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research , 176 Hawkesbury road, Westmead NSW 2145 , Australia.,c Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney , NSW Australia
| | - Adolfo Saiardi
- d Medical Research Council Laboratory for Molecular Cell Biology, University College London , Gower street, London WC1E 6BT , UK
| | - Ana P G Silva
- e School of Life and Environmental Sciences, The University of Sydney , Camperdown , NSW 2006 , Australia
| | - Joel P Mackay
- e School of Life and Environmental Sciences, The University of Sydney , Camperdown , NSW 2006 , Australia
| | - Philip E Thompson
- f Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences , Monash University , 381 Royal Parade, Parkville , VIC 3052 , Australia
| | - Tania C Sorrell
- a Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research , 176 Hawkesbury road, Westmead NSW 2145 , Australia.,b Sydney Medical School-Westmead, The University of Sydney , Westmead NSW 2145 , Australia.,c Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney , NSW Australia.,g Westmead Hospital , Westmead , NSW 2145 , Australia
| | - Julianne T Djordjevic
- a Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research , 176 Hawkesbury road, Westmead NSW 2145 , Australia.,b Sydney Medical School-Westmead, The University of Sydney , Westmead NSW 2145 , Australia.,c Marie Bashir Institute for Infectious Diseases and Biosecurity, University of Sydney , NSW Australia.,g Westmead Hospital , Westmead , NSW 2145 , Australia
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50
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Maldonado S, Fitzgerald-Bocarsly P. Antifungal Activity of Plasmacytoid Dendritic Cells and the Impact of Chronic HIV Infection. Front Immunol 2017; 8:1705. [PMID: 29255464 PMCID: PMC5723005 DOI: 10.3389/fimmu.2017.01705] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 11/20/2017] [Indexed: 01/10/2023] Open
Abstract
Due to the effectiveness of combined antiretroviral therapy, people living with HIV can control viral replication and live longer lifespans than ever. However, HIV-positive individuals still face challenges to their health and well-being, including dysregulation of the immune system resulting from years of chronic immune activation, as well as opportunistic infections from pathogenic fungi. This review focuses on one of the key players in HIV immunology, the plasmacytoid dendritic cell (pDC), which links the innate and adaptive immune response and is notable for being the body’s most potent producer of type-I interferons (IFNs). During chronic HIV infection, the pDC compartment is greatly dysregulated, experiencing a substantial depletion in number and compromise in function. This immune dysregulation may leave patients further susceptible to opportunistic infections. This is especially important when considering a new role for pDCs currently emerging in the literature: in addition to their role in antiviral immunity, recent studies suggest that pDCs also play an important role in antifungal immunity. Supporting this new role, pDCs express C-type lectin receptors including dectin-1, dectin-2, dectin-3, and mannose receptor, and toll-like receptors-4 and -9 that are involved in recognition, signaling, and response to a wide variety of fungal pathogens, including Aspergillus fumigatus, Cryptococcus neoformans, Candida albicans, and Pneumocystis jirovecii. Accordingly, pDCs have been demonstrated to recognize and respond to certain pathogenic fungi, measured via activation, cytokine production, and fungistatic activity in vitro, while in vivo mouse models indicated a strikingly vital role for pDCs in survival against pulmonary Aspergillus challenge. Here, we discuss the role of the pDC compartment and the dysregulation it undergoes during chronic HIV infection, as well as what is known so far about the role and mechanisms of pDC antifungal activity.
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Affiliation(s)
- Samuel Maldonado
- Rutgers School of Graduate Studies, Newark, NJ, United States.,Department of Pathology and Laboratory Medicine, New Jersey Medical School, Newark, NJ, United States
| | - Patricia Fitzgerald-Bocarsly
- Rutgers School of Graduate Studies, Newark, NJ, United States.,Department of Pathology and Laboratory Medicine, New Jersey Medical School, Newark, NJ, United States
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