1
|
Fujita M, Miyazawa T, Uchida K, Uchida N, Haji S, Yano S, Iwahashi N, Hatayama T, Katsuhara S, Nakamura S, Takeichi Y, Yokomoto-Umakoshi M, Miyachi Y, Sakamoto R, Iwakura Y, Ogawa Y. Dectin-2 Deficiency Promotes Proinflammatory Cytokine Release From Macrophages and Impairs Insulin Secretion. Endocrinology 2023; 165:bqad181. [PMID: 38038367 DOI: 10.1210/endocr/bqad181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/02/2023]
Abstract
Pancreatic islet inflammation plays a crucial role in the etiology of type 2 diabetes (T2D). Macrophages residing in pancreatic islets have emerged as key players in islet inflammation. Macrophages express a plethora of innate immune receptors that bind to environmental and metabolic cues and integrate these signals to trigger an inflammatory response that contributes to the development of islet inflammation. One such receptor, Dectin-2, has been identified within pancreatic islets; however, its role in glucose metabolism remains largely unknown. Here we have demonstrated that mice lacking Dectin-2 exhibit local inflammation within islets, along with impaired insulin secretion and β-cell dysfunction. Our findings indicate that these effects are mediated by proinflammatory cytokines, such as interleukin (IL)-1α and IL-6, which are secreted by macrophages that have acquired an inflammatory phenotype because of the loss of Dectin-2. This study provides novel insights into the mechanisms underlying the role of Dectin-2 in the development of islet inflammation.
Collapse
Affiliation(s)
- Masamichi Fujita
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Takashi Miyazawa
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Keiichiro Uchida
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto, 606-8501, Japan
| | - Naohiro Uchida
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Shojiro Haji
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Seiichi Yano
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Norifusa Iwahashi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Tomomi Hatayama
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Shunsuke Katsuhara
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Shintaro Nakamura
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yukina Takeichi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Maki Yokomoto-Umakoshi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yasutaka Miyachi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Ryuichi Sakamoto
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yoichiro Iwakura
- Center for Animal Disease Models, Research Institute for Biomedical Sciences, Tokyo University of Science, Yamazaki 2669, Noda-shi, Chiba, 278-0022, Japan
| | - Yoshihiro Ogawa
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| |
Collapse
|
2
|
Cardoso-Miguel MDRD, Bürgel PH, de Castro RJA, Marina CL, de Oliveira SA, Albuquerque P, Silva-Pereira I, Bocca AL, Tavares AH. Dectin-2 is critical for phagocyte function and resistance to Paracoccidioides brasiliensis in mice. Med Mycol 2023; 61:myad117. [PMID: 37960963 DOI: 10.1093/mmy/myad117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/11/2023] [Accepted: 11/11/2023] [Indexed: 11/15/2023] Open
Abstract
Germline-encoded pattern recognition receptors, particularly C-type lectin receptors (CLRs), are essential for phagocytes to sense invading fungal cells. Among CLRs, Dectin-2 (encoded by Clec4n) plays a critical role in the antifungal immune response as it recognizes high-mannose polysaccharides on the fungal cell wall, triggering phagocyte functional activities and ultimately determining adaptive responses. Here, we assessed the role of Dectin-2 on the course of primary Paracoccidioides brasiliensis systemic infection in mice with Dectin-2-targeted deletion. Paracoccidioides brasiliensis constitutes the principal etiologic agent of paracoccidioidomycosis, the most prominent invasive mycosis in Latin American countries. The deficiency of Dectin-2 resulted in shortened survival rates, high lung fungal burden, and increased lung pathology in mice infected with P. brasiliensis. Consistently, dendritic cells (DCs) from mice lacking Dectin-2 infected ex vivo with P. brasiliensis showed impaired secretion of several proinflammatory and regulatory cytokines, including TNF-α, IL-1β, IL-6, and IL-10. Additionally, when cocultured with splenic lymphocytes, DCs were less efficient in promoting a type 1 cytokine pattern secretion (i.e., IFN-γ). In macrophages, Dectin-2-mediated signaling was required to ensure phagocytosis and fungicidal activity associated with nitric oxide production. Overall, Dectin-2-mediated signaling is critical to promote host protection against P. brasiliensis infection, and its exploitation might lead to the development of new vaccines and immunotherapeutic approaches.
Collapse
Affiliation(s)
- Mariana de Resende Damas Cardoso-Miguel
- Graduate Program in Microbial Biology, Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
- Department of Cell Biology, Laboratory of Applied Immunology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
| | - Pedro Henrique Bürgel
- Graduate Program in Microbial Biology, Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
- Department of Cell Biology, Laboratory of Applied Immunology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
| | - Raffael Júnio Araújo de Castro
- Department of Cell Biology, Laboratory of Applied Immunology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
| | - Clara Luna Marina
- Department of Cell Biology, Laboratory of Applied Immunology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
| | - Stephan Alberto de Oliveira
- Department of Cell Biology, Laboratory of Applied Immunology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
| | - Patrícia Albuquerque
- Graduate Program in Microbial Biology, Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
- Department of Cell Biology, Laboratory of Molecular Biology of Pathogenic Fungi, University of Brasília, Brasília, DF, Brazil
- Laboratory of Microorganism, Faculty of Ceilândia, University of Brasília, Brasília, DF, Brazil
| | - Ildinete Silva-Pereira
- Department of Cell Biology, Laboratory of Molecular Biology of Pathogenic Fungi, University of Brasília, Brasília, DF, Brazil
| | - Anamélia Lorenzetti Bocca
- Department of Cell Biology, Laboratory of Applied Immunology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
| | - Aldo Henrique Tavares
- Graduate Program in Microbial Biology, Department of Cell Biology, Institute of Biological Sciences, University of Brasília, Brasília, DF, Brazil
- Laboratory of Microorganism, Faculty of Ceilândia, University of Brasília, Brasília, DF, Brazil
| |
Collapse
|
3
|
Zhan L, Tian X, Lin J, Zhang Y, Zheng H, Peng X, Zhao G. Honokiol reduces fungal burden and ameliorate inflammation lesions of Aspergillus fumigatus keratitis via Dectin-2 down-regulation. Int Immunopharmacol 2023; 118:109849. [PMID: 36933490 DOI: 10.1016/j.intimp.2023.109849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 01/29/2023] [Accepted: 02/03/2023] [Indexed: 03/18/2023]
Abstract
PURPOSE To screen and identify the mechanism of honokiol on anti-fungi and anti-inflammation in fungal keratitis (FK) through bioinformatic analysis and biological experiments. METHODS Transcriptome profile demonstrated differential expression genes (DEGs) of Aspergillus fumigatus keratitis between PBS-treated and honokiol-treated groups via bioinformatics analyses. Inflammatory substances were quantified by qRT-PCR, Western blot and ELISA, and macrophage polarization was examined by flow cytometry. Periodic acid Schiff staining and morphological interference assay were used to detect hyphal distribution in vivo and fungal germination in vitro, respectively. Electron microscopy was to illustrate hyphal microstructure. RESULTS Illumina sequencing demonstrated that compared with the honokiol group, 1175 up-regulated and 383 down-regulated genes were induced in C57BL/6 mice Aspergillus fumigatus keratitis with PBS treatment. Through GO analysis, some differential expression proteins (DEPs) played major roles in biological processes, especially fungal defense and immune activation. KEGG analysis provided fungus-related signaling pathways. PPI analysis demonstrated that DEPs from multiple pathways form a close-knit network, providing a broader context for FK treatment. In biological experiments, Dectin-2, NLRP3 and IL-1β were upregulated by Aspergillus fumigatus to evaluate immune response. Honokiol could reverse the trend, comparable to Dectin-2 siRNA interference. Meanwhile, honokiol could also play an anti-inflammatory role via promoting M2 phenotype polarization. Moreover, honokiol reduced hyphal distribution in the stroma, delayed germination, and destroyed the hyphal cell membrane in-vitro. CONCLUSIONS Honokiol possesses anti-fungal and anti-inflammatory effects in Aspergillus fumigatus keratitis and may develop a potential and safe therapeutic modality for FK.
Collapse
Affiliation(s)
- Lu Zhan
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xue Tian
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jing Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yingxue Zhang
- Department of Biochemistry, Microbiology and Immunology, Wayne State University School of Medicine 540 E. Canfield Avenue Detroit, MI 48201, USA
| | - Hengrui Zheng
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xudong Peng
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China; Department of Ophthalmology, University of Washington, Seattle WA98104, USA.
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China.
| |
Collapse
|
4
|
Zhan L, Tian X, Lin J, Peng X, Zhao G. Glabridin Inhibits Aspergillus fumigatus Growth and Alleviate Inflammation Mediated by Dectin-2 and NLRP3 Inflammasome. Curr Eye Res 2023; 48:348-356. [PMID: 36785524 DOI: 10.1080/02713683.2022.2164779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
PURPOSE The research was used to uncover the mechanism of glabridin in Aspergillus fumigatus keratitis in anti-fungus and anti-inflammation. METHODS In vitro, RAW 264.7 cells were infected with A. fumigatus with incubation of glabridin in different concentrations. Real-time quantitative polymerase chain reaction (RT‑qPCR), Western blot, and enzyme-linked immunosorbent assay (ELISA) were used to assess the inflammatory severe and alternation with the intervention of Dectin-2 siRNA and glabridin. In vivo, A. fumigatus keratitis mouse models were established by spore intra-stromal injection and treated with glabridin or PBS. And disease scores, inflammatory mediators, and periodic acid-schiff (PAS) staining were exhibited to demonstrate the therapeutic efficiency of glabridin in vivo. Morphological interference assay monitored fungal germination. Scanning and transmission electron microscopy were used to observe the growth of fungi. RESULTS In RAW 264.7 cells and mouse keratitis models, noncytotoxic 16 μg/mL glabridin showed significant inhibition in the expression of Dectin-2, NLRP3, Caspase-1, IL-1β, and TNF-α after A. fumigatus infection, almost similar to the intervention of Dectin-2 siRNA. PAS staining illustrated the reduced hyphal distribution in cornea stroma with glabridin treatment. Glabridin remarkably inhibited A. fumigatus growth through delaying germination and disrupting the integrity of the hyphae membrane. CONCLUSION Glabridin plays an anti-inflammatory role in A. fumigatus challenge via suppression of the Dectin-2 and NLRP3 inflammasome, and plays an anti-fungal role through delaying germination and changing the hyphal integrity.KEY MESSAGESGlabridin plays an anti-inflammatory role in A. fumigatus infection of RAW264.7 cells in a concentration-dependent manner and through Dectin-2 mediation.Glabridin decreases fungal distribution and inflammation in mouse A. fumigatus keratitis.Glabridin inhibits A. fumigatus growth by delaying germination and disrupting cellular structure in vitro.
Collapse
Affiliation(s)
- Lu Zhan
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xue Tian
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jing Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xudong Peng
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China.,Department of Ophthalmology, University of Washington, Seattle, WA, USA
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| |
Collapse
|
5
|
Reis SF, Martins VJ, Bastos R, Lima T, Correia VG, Pinheiro BA, Silva LM, Palma AS, Ferreira P, Vilanova M, Coimbra MA, Coelho E. Feasibility of Brewer's Spent Yeast Microcapsules as Targeted Oral Carriers. Foods 2023; 12. [PMID: 36673340 DOI: 10.3390/foods12020246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/15/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023] Open
Abstract
Brewer's spent yeast (BSY) microcapsules have a complex network of cell-wall polysaccharides that are induced by brewing when compared to the baker's yeast (Saccharomyces cerevisiae) microcapsules. These are rich in (β1→3)-glucans and covalently linked to (α1→4)- and (β1→4)-glucans in addition to residual mannoproteins. S. cerevisiae is often used as a drug delivery system due to its immunostimulatory potential conferred by the presence of (β1→3)-glucans. Similarly, BSY microcapsules could also be used in the encapsulation of compounds or drug delivery systems with the advantage of resisting digestion conferred by (β1→4)-glucans and promoting a broader immunomodulatory response. This work aims to study the feasibility of BSY microcapsules that are the result of alkali and subcritical water extraction processes, as oral carriers for food and biomedical applications by (1) evaluating the resistance of BSY microcapsules to in vitro digestion (IVD), (2) their recognition by the human Dectin-1 immune receptor after IVD, and (3) the recognition of IVD-solubilized material by different mammalian immune receptors. IVD digested 44-63% of the material, depending on the extraction process. The non-digested material, despite some visible agglutination and deformation of the microcapsules, preserved their spherical shape and was enriched in (β1→3)-glucans. These microcapsules were all recognized by the human Dectin-1 immune receptor. The digested material was differentially recognized by a variety of lectins of the immune system related to (β1→3)-glucans, glycogen, and mannans. These results show the potential of BSY microcapsules to be used as oral carriers for food and biomedical applications.
Collapse
|
6
|
Wang Y, Spatz M, Da Costa G, Michaudel C, Lapiere A, Danne C, Agus A, Michel ML, Netea MG, Langella P, Sokol H, Richard ML. Deletion of both Dectin-1 and Dectin-2 affects the bacterial but not fungal gut microbiota and susceptibility to colitis in mice. Microbiome 2022; 10:91. [PMID: 35698210 PMCID: PMC9195441 DOI: 10.1186/s40168-022-01273-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 04/14/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Innate immunity genes have been reported to affect susceptibility to inflammatory bowel diseases (IBDs) and colitis in mice. Dectin-1, a receptor for fungal cell wall β-glucans, has been clearly implicated in gut microbiota modulation and modification of the susceptibility to gut inflammation. Here, we explored the role of Dectin-1 and Dectin-2 (another receptor for fungal cell wall molecules) deficiency in intestinal inflammation. DESIGN Susceptibility to dextran sodium sulfate (DSS)-induced colitis was assessed in wild-type, Dectin-1 knockout (KO), Dectin-2KO, and double Dectin-1KO and Dectin-2KO (D-1/2KO) mice. Inflammation severity, as well as bacterial and fungal microbiota compositions, was monitored. RESULTS While deletion of Dectin-1 or Dectin-2 did not have a strong effect on DSS-induced colitis, double deletion of Dectin-1 and Dectin-2 significantly protected the mice from colitis. The protection was largely mediated by the gut microbiota, as demonstrated by fecal transfer experiments. Treatment of D-1/2KO mice with opportunistic fungal pathogens or antifungal agents did not affect the protection against gut inflammation, suggesting that the fungal microbiota had no role in the protective phenotype. Amplicon-based microbiota analysis of the fecal bacterial and fungal microbiota of D-1/2KO mice confirmed the absence of changes in the mycobiota but strong modification of the bacterial microbiota. We showed that bacteria from the Lachnospiraceae family were at least partly involved in this protection and that treatment with Blautia hansenii was enough to recapitulate the protection. CONCLUSIONS Deletion of both the Dectin-1 and Dectin-2 receptors triggered a global shift in the microbial gut environment, affecting, surprisingly, mainly the bacterial population and driving protective effects in colitis. Members of the Lachnospiraceae family seem to play a central role in this protection. These findings provide new insights into the role of the Dectin receptors, which have been described to date as affecting only the fungal population, in intestinal physiopathology and in IBD. Video Abstract.
Collapse
Affiliation(s)
- Yazhou Wang
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Madeleine Spatz
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Gregory Da Costa
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Chloé Michaudel
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Alexia Lapiere
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Camille Danne
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Allison Agus
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Marie-Laure Michel
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Mihai G Netea
- Department of Internal Medicine and Center for Infectious Diseases, Radboud University, Nijmegen, Netherlands
- Department of Immunology and Metabolism, Life & Medical Sciences Institute, University of Bonn, Bonn, Germany
| | - Philippe Langella
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
| | - Harry Sokol
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France
- Gastroenterology Department INSERM, Centre de Recherche Saint-Antoine, CRSA, AP-HP, Saint Antoine Hospital, Sorbonne Université, F-75012, Paris, France
| | - Mathias L Richard
- Universite Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Domaine de Vilvert, 78352, Jouy en Josas, France.
- Paris Center for Microbiome Medicine, Fédération Hospitalo-Universitaire, 75012, Paris, France.
| |
Collapse
|
7
|
Qu Y, Ma X, Deng J, Shang Y, Shang K, Wang X, Guo Z, Bai C. Dectin-2 promotes house dust mite-skewed Th2 response through the activation of cDC2s. Cell Immunol 2022; 378:104558. [PMID: 35717749 DOI: 10.1016/j.cellimm.2022.104558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/27/2022] [Accepted: 06/01/2022] [Indexed: 11/20/2022]
Abstract
The role of Dectin-2 (gene symbol, Clec4n) in house dust mite (HDM) induced Th2 immune response and the exact mechanism remains controversial. In this study, we illustrated that, Clec4n-/- mice had decreased Th2 immune response following HDM challenge, which may ascribe to dramatically reduced type 2 conventional dendritic cells (cDC2s) in lung of Clec4n-/- mice, as cDC2s from lung of Clec4n-/- mice after challenging had less ability to induce Th2 response with decreased production of IL-4/IL-13. Further in vitro experiments showed the activation of Clec4n-/--BMDCs significantly decreased after HDM stimulation accompanied with decreased activation of Syk-NF-κB and Syk-JNK signal pathway. Importantly, Dectin-2 expression in PBMCs from asthmatic patients was significantly higher than that in healthy controls. Taken together, these results demonstrated that Dectin-2 could promote cDC2s activation in lung, which polarizes Th2 immune response outlining a novel mechanism of asthma development.
Collapse
|
8
|
Kruppa MD, Lowman DW, Ensley HE, Ma Z, Graves B, Kintner J, Hall JV, Ozment TR, Williams DL. Isolation, Physicochemical Characterization, Labeling, and Biological Evaluation of Mannans and Glucans. Methods Mol Biol 2022; 2542:323-360. [PMID: 36008676 DOI: 10.1007/978-1-0716-2549-1_24] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The cell wall contains mannans and glucans that are recognized by the host immune system. In this chapter, we will describe the methods to isolate mannans and glucans from the C. albicans cell wall. In addition, we describe how to determine purity, molecular size, and structure of the mannans and glucans. We also detail how to prepare the carbohydrates for in vitro, ex vivo, or in vivo use by describing endotoxin removal (depyrogenation), derivatization, and labeling and evaluation of bioactivity.
Collapse
Affiliation(s)
- Michael D Kruppa
- Department of Biomedical Sciences, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.
| | - Douglas W Lowman
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Harry E Ensley
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Zuchao Ma
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Bridget Graves
- Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Jennifer Kintner
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Jennifer V Hall
- Department of Biomedical Sciences, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Tammy R Ozment
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - David L Williams
- Department of Surgery, Center of Excellence in Inflammation, Infectious Disease and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| |
Collapse
|
9
|
Griffiths JS, White PL, Czubala MA, Simonazzi E, Bruno M, Thompson A, Rizkallah PJ, Gurney M, da Fonseca DM, Naglik JR, Ingram W, Wilson K, van de Veerdonk FL, Barnes R, Taylor PR, Orr SJ. A Human Dectin-2 Deficiency Associated With Invasive Aspergillosis. J Infect Dis 2021; 224:1219-1224. [PMID: 33733279 PMCID: PMC8514184 DOI: 10.1093/infdis/jiab145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 03/15/2021] [Indexed: 11/26/2022] Open
Abstract
Immunocompromised patients are highly susceptible to invasive aspergillosis. Herein, we identified a homozygous deletion mutation (507 del C) resulting in a frameshift (N170I) and early stop codon in the fungal binding Dectin-2 receptor, in an immunocompromised patient. The mutated form of Dectin-2 was weakly expressed, did not form clusters at/near the cell surface and was functionally defective. Peripheral blood mononuclear cells from this patient were unable to mount a cytokine (tumor necrosis factor, interleukin 6) response to Aspergillus fumigatus, and this first identified Dectin-2–deficient patient died of complications of invasive aspergillosis.
Collapse
Affiliation(s)
- James S Griffiths
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom.,Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, United Kingdom
| | - P Lewis White
- Public Health Wales Microbiology Cardiff, University Hospital of Wales, Cardiff, United Kingdom
| | - Magdalena A Czubala
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Elena Simonazzi
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom.,United Kingdom Dementia Research Institute at Cardiff, Cardiff, United Kingdom
| | - Mariolina Bruno
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Aiysha Thompson
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom.,United Kingdom Dementia Research Institute at Cardiff, Cardiff, United Kingdom
| | - Pierre J Rizkallah
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Mark Gurney
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Diogo M da Fonseca
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
| | - Julian R Naglik
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, United Kingdom
| | - Wendy Ingram
- University Hospital of Wales, Cardiff, United Kingdom
| | - Keith Wilson
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom.,University Hospital of Wales, Cardiff, United Kingdom
| | - Frank L van de Veerdonk
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Philip R Taylor
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom.,United Kingdom Dementia Research Institute at Cardiff, Cardiff, United Kingdom
| | - Selinda J Orr
- Division of Infection and Immunity and Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom.,Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
| |
Collapse
|
10
|
Thompson A, da Fonseca DM, Walker L, Griffiths JS, Taylor PR, Gow NAR, Orr SJ. Dependence on Mincle and Dectin-2 Varies With Multiple Candida Species During Systemic Infection. Front Microbiol 2021; 12:633229. [PMID: 33717025 PMCID: PMC7951061 DOI: 10.3389/fmicb.2021.633229] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/08/2021] [Indexed: 11/13/2022] Open
Abstract
More than 95% of invasive Candida infections are caused by four Candida spp. (C. albicans, C. glabrata, C. tropicalis, C. parapsilosis). C-type lectin-like receptors (CLRs), such as Dectin-1, Dectin-2, and Mincle mediate immune responses to C. albicans. Dectin-1 promotes clearance of C. albicans, C. glabrata, C. tropicalis, and C. parapsilosis, however, dependence on Dectin-1 for specific immune responses varies with the different Candida spp. Dectin-2 is important for host immunity to C. albicans and C. glabrata, and Mincle is important for the immune response to C. albicans. However, whether Dectin-2 drives host immunity to C. tropicalis or C. parapsilosis, and whether Mincle mediates host immunity to C. glabrata, C. tropicalis or C. parapsilosis is unknown. Therefore, we compared the roles of Dectin-2 and Mincle in response to these four Candida spp. We demonstrate that these four Candida spp. cell walls have differential mannan contents. Mincle and Dectin-2 play a key role in regulating cytokine production in response to these four Candida spp. and Dectin-2 is also important for clearance of all four Candida spp. during systemic infection. However, Mincle was only important for clearance of C. tropicalis during systemic infection. Our data indicate that multiple Candida spp. have different mannan contents, and dependence on the mannan-detecting CLRs, Mincle, and Dectin-2 varies between different Candida spp. during systemic infection.
Collapse
Affiliation(s)
- Aiysha Thompson
- Division of Infection and Immunity, Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
- UK Dementia Research Institute, Cardiff, United Kingdom
| | - Diogo M. da Fonseca
- Division of Infection and Immunity, Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
- School of Medicine, Dentistry and Biomedical Science, Wellcome Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast, United Kingdom
| | - Louise Walker
- Aberdeen Fungal Group, University of Aberdeen, Aberdeen, United Kingdom
| | - James S. Griffiths
- Division of Infection and Immunity, Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
- Faculty of Dentistry, Oral & Craniofacial Sciences, Centre for Host-Microbiome Interactions, King’s College London, London, United Kingdom
| | - Philip R. Taylor
- Division of Infection and Immunity, Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
- UK Dementia Research Institute, Cardiff, United Kingdom
| | - Neil A. R. Gow
- Aberdeen Fungal Group, University of Aberdeen, Aberdeen, United Kingdom
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
| | - Selinda J. Orr
- Division of Infection and Immunity, Systems Immunity Research Institute, Cardiff University School of Medicine, Cardiff, United Kingdom
- School of Medicine, Dentistry and Biomedical Science, Wellcome Wolfson Institute for Experimental Medicine, Queen’s University Belfast, Belfast, United Kingdom
| |
Collapse
|
11
|
Thiem K, Hoeke G, Zhou E, Hijmans A, Houben T, Boels MG, Mol IM, Lutgens E, Shiri-Sverdlov R, Bussink J, Kanneganti TD, Boon MR, Stienstra R, Tack CJ, Rensen PCN, Netea MG, Berbée JFP, van Diepen JA. Deletion of haematopoietic Dectin-2 or CARD9 does not protect from atherosclerosis development under hyperglycaemic conditions. Diab Vasc Dis Res 2020; 17:1479164119892140. [PMID: 31868000 PMCID: PMC7510497 DOI: 10.1177/1479164119892140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND C-type lectin receptors, including Dectin-2, are pattern recognition receptors on monocytes and macrophages that mainly recognize sugars and sugar-like structures present on fungi. Activation of C-type lectin receptors induces downstream CARD9 signalling, leading to the production of cytokines. We hypothesized that under hyperglycaemic conditions, as is the case in diabetes mellitus, glycosylated protein (sugar-like) structures activate C-type lectin receptors, leading to immune cell activation and increased atherosclerosis development. METHODS Low-density lipoprotein receptor-deficient mice were lethally irradiated and transplanted with bone marrow from control wild-type, Dectin-2-/- or Card9-/- mice. After 6 weeks of recovery, mice received streptozotocin injections (50 mg/g BW; 5 days) to induce hyperglycaemia. After an additional 2 weeks, mice were fed a Western-type diet (0.1% cholesterol) for 10 weeks. RESULTS AND CONCLUSION Deletion of haematopoietic Dectin-2 reduced the number of circulating Ly6Chi monocytes, increased pro-inflammatory cytokine production, but did not affect atherosclerosis development. Deletion of haematopoietic CARD9 tended to reduce macrophage and collagen content in atherosclerotic lesions, again without influencing the lesion size. Deletion of haematopoietic Dectin-2 did not influence atherosclerosis development under hyperglycaemic conditions, despite some minor effects on inflammation. Deletion of haematopoietic CARD9 induced minor alterations in plaque composition under hyperglycaemic conditions, without affecting lesion size.
Collapse
MESH Headings
- Animals
- Antigens, Ly/metabolism
- Aorta/metabolism
- Aorta/pathology
- Aortic Diseases/etiology
- Aortic Diseases/genetics
- Aortic Diseases/metabolism
- Aortic Diseases/pathology
- Atherosclerosis/etiology
- Atherosclerosis/genetics
- Atherosclerosis/metabolism
- Atherosclerosis/pathology
- Biomarkers/blood
- Blood Glucose/metabolism
- Bone Marrow Transplantation
- CARD Signaling Adaptor Proteins/deficiency
- CARD Signaling Adaptor Proteins/genetics
- Cells, Cultured
- Collagen/metabolism
- Cytokines/metabolism
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/complications
- Diet, Western
- Gene Deletion
- Genetic Predisposition to Disease
- Hematopoietic Stem Cells/metabolism
- Lectins, C-Type/deficiency
- Lectins, C-Type/genetics
- Macrophages, Peritoneal/metabolism
- Macrophages, Peritoneal/pathology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Monocytes/metabolism
- Monocytes/pathology
- Plaque, Atherosclerotic
- Receptors, LDL/deficiency
- Receptors, LDL/genetics
Collapse
Affiliation(s)
- Kathrin Thiem
- Department of Internal Medicine and
Radboud Institute for Molecular Life Sciences, Radboud University Medical Center,
Nijmegen, The Netherlands
- Kathrin Thiem, Department of Internal
Medicine and Radboud Institute for Molecular Life Sciences, Radboud University
Medical Center, 463, Geert Grooteplein zuid 8, 6525 GA Nijmegen, The
Netherlands.
| | - Geerte Hoeke
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory for Experimental
Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Enchen Zhou
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory for Experimental
Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Anneke Hijmans
- Department of Internal Medicine and
Radboud Institute for Molecular Life Sciences, Radboud University Medical Center,
Nijmegen, The Netherlands
| | - Tom Houben
- Departments of Molecular Genetics, Human
Biology and Surgery, School of Nutrition and Translational Research in Metabolism
(NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - Margien G Boels
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Division of Nephrology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Isabel M Mol
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory for Experimental
Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Esther Lutgens
- Division of Experimental Vascular
Biology, Department of Medical Biochemistry, Academic Medical Center, University of
Amsterdam, Amsterdam, The Netherlands
- Institute for Cardiovascular Prevention,
Ludwig Maximilians University of Munich, Munich, Germany
| | - Ronit Shiri-Sverdlov
- Departments of Molecular Genetics, Human
Biology and Surgery, School of Nutrition and Translational Research in Metabolism
(NUTRIM), Maastricht University, Maastricht, The Netherlands
| | - Johan Bussink
- Department of Radiation Oncology,
Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Mariëtte R Boon
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory for Experimental
Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Rinke Stienstra
- Department of Internal Medicine and
Radboud Institute for Molecular Life Sciences, Radboud University Medical Center,
Nijmegen, The Netherlands
- Division of Human Nutrition,
Wageningen University, Wageningen, The Netherlands
| | - Cees J Tack
- Department of Internal Medicine and
Radboud Institute for Molecular Life Sciences, Radboud University Medical Center,
Nijmegen, The Netherlands
| | - Patrick CN Rensen
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory for Experimental
Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Mihai G Netea
- Department of Internal Medicine and
Radboud Institute for Molecular Life Sciences, Radboud University Medical Center,
Nijmegen, The Netherlands
- Department for Genomics and
Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn,
Bonn, Germany
| | - Jimmy FP Berbée
- Division of Endocrinology, Department of
Medicine, Leiden University Medical Center, Leiden, The Netherlands
- Einthoven Laboratory for Experimental
Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Janna A van Diepen
- Department of Internal Medicine and
Radboud Institute for Molecular Life Sciences, Radboud University Medical Center,
Nijmegen, The Netherlands
| |
Collapse
|
12
|
Chen MH, Huang MT, Yu WK, Lee SS, Wang JH, Cheng TJR, Bowman MR, Hsieh SL. Antibody blockade of Dectin-2 suppresses house dust mite-induced Th2 cytokine production in dendritic cell- and monocyte-depleted peripheral blood mononuclear cell co-cultures from asthma patients. J Biomed Sci 2019; 26:97. [PMID: 31861989 PMCID: PMC6925444 DOI: 10.1186/s12929-019-0598-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 12/04/2019] [Indexed: 12/11/2022] Open
Abstract
Background Dectin-2, which is a C-type lectin, interacts with the house dust mite (HDM) Dermatophagoides pteronyssinus allergen. This study aimed to investigate whether Dectin-2 blockade by antagonistic monoclonal antibodies (MoAbs) attenuates HDM-induced allergic responses. Methods Two anti-Dectin-2 MoAbs were generated and validated for specific binding to Dectin-2 Fc fusion protein (Dectin-2.Fc) and inhibition of Dectin-2.Fc/HDM interaction. Patients with asthma exhibiting high titers of anti-D. pteronyssinus IgE were enrolled. Peripheral blood mononuclear cells with depleted CD14+ monocytes were obtained from these patients and co-cultured with autologous monocyte-derived conventional dendritic cells in the presence of D. pteronyssinus or its group 2 allergens (Der p 2). Interleukin (IL)-5 and IL-13 levels in the culture supernatants were determined using ELISA in the presence or absence of anti-Dectin-2 MoAbs. Results Two MoAbs, 6A4G7 and 17A1D10, showed specific binding to recombinant Dectin-2.Fc and inhibited HDM binding to Dectin-2.Fc. Both anti-Dectin-2 MoAbs inhibited IL-5 and IL-13 production in co-cultures with Der p 2 stimulation in a dose-dependent manner. 6A4G7 and 17A1D10 (3 μg/mL) significantly inhibited Der p 2-induced (3 μg/mL) IL-5 production by 69.7 and 86.4% and IL-13 production by 84.0 and 81.4%, respectively. Moreover, this inhibitory effect of the two MoAbs remained significant in the presence of D. pteronyssinus. Conclusions Anti-Dectin-2 MoAbs significantly inhibited HDM-induced allergic responses in vitro and therefore have the potential to become therapeutic agents in mite-induced allergic diseases.
Collapse
Affiliation(s)
- Ming-Han Chen
- Division of Allergy, Immunology & Rheumatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Medicine, National Yang-Ming University, Taipei, Taiwan
| | | | - Wen-Kuang Yu
- Department of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shinn-Shing Lee
- Section of Allergy, Immunology, and Rheumatology, Department of Medicine, Cheng Hsin Rehabilitation Medical Center, Taipei, Taiwan
| | - Jia-Horng Wang
- Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.,Critical Care, Far Eastern Memorial Hospital, Taipei, Taiwan
| | | | - Michael R Bowman
- Inflammation and Immunology Research Unit, Pfizer Inc, Cambridge, MA, USA.,Present address: Immunology and Inflammation Therapeutic Area, Sanofi, Cambridge, MA, USA
| | - Shie-Liang Hsieh
- Genomics Research Center, Academia Sinica, Taipei, Taiwan. .,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan. .,Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan. .,Institute for Cancer Biology and Drug Discovery, Taipei Medical University, 128 Academia Road, Section 2, Nankang, Taipei, 115, Taiwan.
| |
Collapse
|
13
|
Abstract
Invasive fungal diseases caused by Candida albicans, Cryptococcus neoformans, and Aspergillus fumigatus have mortality rates ranging from 10 to 95%. Individual patient costs may exceed $100,000 in the United States. All antifungals in current use have serious limitations due to host toxicity and/or insufficient fungal cell killing that results in recurrent infections. Few new antifungal drugs have been introduced in the last 2 decades. Hence, there is a critical need for improved antifungal therapeutics. By targeting antifungal-loaded liposomes to α-mannans in the extracellular matrices secreted by these fungi, we dramatically reduced the effective dose of drug. Dectin-2-coated liposomes loaded with amphotericin B bound 50- to 150-fold more strongly to C. albicans, C. neoformans, and A. fumigatus than untargeted liposomes and killed these fungi more than an order of magnitude more efficiently. Targeting drug-loaded liposomes specifically to fungal cells has the potential to greatly enhance the efficacy of most antifungal drugs. Candida albicans, Cryptococcus neoformans, and Aspergillus fumigatus cause life-threatening candidiasis, cryptococcosis, and aspergillosis, resulting in several hundred thousand deaths annually. The patients at the greatest risk of developing these life-threatening invasive fungal infections have weakened immune systems. The vulnerable population is increasing due to rising numbers of immunocompromised individuals as a result of HIV infection or immunosuppressed individuals receiving anticancer therapies and/or stem cell or organ transplants. While patients are treated with antifungals such as amphotericin B, all antifungals have serious limitations due to lack of sufficient fungicidal effect and/or host toxicity. Even with treatment, 1-year survival rates are low. We explored methods of increasing drug effectiveness by designing fungicide-loaded liposomes specifically targeted to fungal cells. Most pathogenic fungi are encased in cell walls and exopolysaccharide matrices rich in mannans. Dectin-2 is a mammalian innate immune membrane receptor that binds as a dimer to mannans and signals fungal infection. We coated amphotericin-loaded liposomes with monomers of Dectin-2’s mannan-binding domain, sDectin-2. sDectin monomers were free to float in the lipid membrane and form dimers that bind mannan substrates. sDectin-2-coated liposomes bound orders of magnitude more efficiently to the extracellular matrices of several developmental stages of C. albicans, C. neoformans, and A. fumigatus than untargeted control liposomes. Dectin-2-coated amphotericin B-loaded liposomes reduced the growth and viability of all three species more than an order of magnitude more efficiently than untargeted control liposomes and dramatically decreased the effective dose. Future efforts focus on examining pan-antifungal targeted liposomal drugs in animal models of fungal diseases. IMPORTANCE Invasive fungal diseases caused by Candida albicans, Cryptococcus neoformans, and Aspergillus fumigatus have mortality rates ranging from 10 to 95%. Individual patient costs may exceed $100,000 in the United States. All antifungals in current use have serious limitations due to host toxicity and/or insufficient fungal cell killing that results in recurrent infections. Few new antifungal drugs have been introduced in the last 2 decades. Hence, there is a critical need for improved antifungal therapeutics. By targeting antifungal-loaded liposomes to α-mannans in the extracellular matrices secreted by these fungi, we dramatically reduced the effective dose of drug. Dectin-2-coated liposomes loaded with amphotericin B bound 50- to 150-fold more strongly to C. albicans, C. neoformans, and A. fumigatus than untargeted liposomes and killed these fungi more than an order of magnitude more efficiently. Targeting drug-loaded liposomes specifically to fungal cells has the potential to greatly enhance the efficacy of most antifungal drugs.
Collapse
|
14
|
Jiménez JM, Salazar ML, Arancibia S, Villar J, Salazar F, Brown GD, Lavelle EC, Martínez-Pomares L, Ortiz-Quintero J, Lavandero S, Manubens A, Becker MI. TLR4, but Neither Dectin-1 nor Dectin-2, Participates in the Mollusk Hemocyanin-Induced Proinflammatory Effects in Antigen-Presenting Cells From Mammals. Front Immunol 2019; 10:1136. [PMID: 31214162 PMCID: PMC6554540 DOI: 10.3389/fimmu.2019.01136] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 05/07/2019] [Indexed: 11/18/2022] Open
Abstract
Mollusk hemocyanins have biomedical uses as carriers/adjuvants and nonspecific immunostimulants with beneficial clinical outcomes by triggering the production of proinflammatory cytokines in antigen-presenting cells (APCs) and driving immune responses toward type 1 T helper (Th1) polarization. Significant structural features of hemocyanins as a model antigen are their glycosylation patterns. Indeed, hemocyanins have a multivalent nature as highly mannosylated antigens. We have previously shown that hemocyanins are internalized by APCs through receptor-mediated endocytosis with proteins that contain C-type lectin domains, such as mannose receptor (MR). However, the contribution of other innate immune receptors to the proinflammatory signaling pathway triggered by hemocyanins is unknown. Thus, we studied the roles of Dectin-1, Dectin-2, and Toll-like receptor 4 (TLR4) in the hemocyanin activation of murine APCs, both in dendritic cells (DCs) and macrophages, using hemocyanins from Megathura crenulata (KLH), Concholepas concholepas (CCH) and Fissurella latimarginata (FLH). The results showed that these hemocyanins bound to chimeric Dectin-1 and Dectin-2 receptors in vitro; which significantly decreased when the glycoproteins were deglycosylated. However, hemocyanin-induced proinflammatory effects in APCs from Dectin-1 knock-out (KO) and Dectin-2 KO mice were independent of both receptors. Moreover, when wild-type APCs were cultured in the presence of hemocyanins, phosphorylation of Syk kinase was not detected. We further showed that KLH and FLH induced ERK1/2 phosphorylation, a key event involved in the TLR signaling pathway. We confirmed a glycan-dependent binding of hemocyanins to chimeric TLR4 in vitro. Moreover, DCs from mice deficient for MyD88-adapter-like (Mal), a downstream adapter molecule of TLR4, were partially activated by FLH, suggesting a role of the TLR pathway in hemocyanin recognition to activate APCs. The participation of TLR4 was confirmed through a decrease in IL-12p40 and IL-6 secretion induced by FLH when a TLR4 blocking antibody was used; a reduction was also observed in DCs from C3H/HeJ mice, a mouse strain with a nonfunctional mutation for this receptor. Moreover, IL-6 secretion induced by FLH was abolished in macrophages deficient for TLR4. Our data showed the involvement of TLR4 in the hemocyanin-mediated proinflammatory response in APCs, which could cooperate with MR in innate immune recognition of these glycoproteins.
Collapse
Affiliation(s)
- José M Jiménez
- Fundación Ciencia y Tecnología Para el Desarrollo (FUCITED), Santiago, Chile
| | - Michelle L Salazar
- Fundación Ciencia y Tecnología Para el Desarrollo (FUCITED), Santiago, Chile
| | - Sergio Arancibia
- Fundación Ciencia y Tecnología Para el Desarrollo (FUCITED), Santiago, Chile
| | - Javiera Villar
- Fundación Ciencia y Tecnología Para el Desarrollo (FUCITED), Santiago, Chile
| | - Fabián Salazar
- Fundación Ciencia y Tecnología Para el Desarrollo (FUCITED), Santiago, Chile.,Aberdeen Fungal Group, Medical Research Council Centre for Medical Mycology, University of Aberdeen, Aberdeen, United Kingdom
| | - Gordon D Brown
- Aberdeen Fungal Group, Medical Research Council Centre for Medical Mycology, University of Aberdeen, Aberdeen, United Kingdom
| | - Ed C Lavelle
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | | | - Jafet Ortiz-Quintero
- Facultad de Ciencias Químicas y Farmacéuticas, Facultad de Medicina, Advanced Center for Chronic Diseases, Universidad de Chile, Santiago, Chile
| | - Sergio Lavandero
- Facultad de Ciencias Químicas y Farmacéuticas, Facultad de Medicina, Advanced Center for Chronic Diseases, Universidad de Chile, Santiago, Chile
| | | | - María Inés Becker
- Fundación Ciencia y Tecnología Para el Desarrollo (FUCITED), Santiago, Chile.,Biosonda Corporation, Santiago, Chile
| |
Collapse
|
15
|
Kalantari P, Morales Y, Miller EA, Jaramillo LD, Ponichtera HE, Wuethrich MA, Cheong C, Seminario MC, Russo JM, Bunnell SC, Stadecker MJ. CD209a Synergizes with Dectin-2 and Mincle to Drive Severe Th17 Cell-Mediated Schistosome Egg-Induced Immunopathology. Cell Rep 2019; 22:1288-1300. [PMID: 29386115 DOI: 10.1016/j.celrep.2018.01.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 11/22/2017] [Accepted: 12/29/2017] [Indexed: 01/05/2023] Open
Abstract
The immunopathology caused by schistosome helminths varies greatly in humans and among mouse strains. A severe form of parasite egg-induced hepatic granulomatous inflammation, seen in CBA mice, is driven by Th17 cells stimulated by IL-1β and IL-23 produced by dendritic cells that express CD209a (SIGNR5), a C-type lectin receptor (CLR) related to human DC-SIGN. Here, we show that CD209a-deficient CBA mice display decreased Th17 responses and are protected from severe immunopathology. In vitro, CD209a augments the egg-induced IL-1β and IL-23 production initiated by the related CLRs Dectin-2 and Mincle. While Dectin-2 and Mincle trigger an FcRγ-dependent signaling cascade that involves the tyrosine kinase Syk and the trimolecular Card9-Bcl10-Malt1 complex, CD209a promotes the sustained activation of Raf-1. Our findings demonstrate that CD209a drives severe Th17 cell-mediated immunopathology in a helminthic disease based on synergy between DC-SIGN- and Dectin-2-related CLRs.
Collapse
Affiliation(s)
- Parisa Kalantari
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA.
| | - Yoelkys Morales
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Emily A Miller
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Luis D Jaramillo
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Holly E Ponichtera
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Marcel A Wuethrich
- University of Wisconsin, Microbial Sciences Building, Madison, WI 53706, USA
| | - Cheolho Cheong
- Institut de Recherches Cliniques de Montreal, Montreal, QC H2W 1R7, Canada
| | - Maria C Seminario
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Joanne M Russo
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Stephen C Bunnell
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Miguel J Stadecker
- Department of Immunology, Tufts University School of Medicine, Boston, MA 02111, USA.
| |
Collapse
|
16
|
Rashid ZM, Mormann M, Steckhan K, Peters A, Esch S, Hensel A. Polysaccharides from lichen Xanthoria parietina: 1,4/1,6-α-d-glucans and a highly branched galactomannan with macrophage stimulating activity via Dectin-2 activation. Int J Biol Macromol 2019; 134:921-935. [PMID: 31078591 DOI: 10.1016/j.ijbiomac.2019.05.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/30/2019] [Accepted: 05/08/2019] [Indexed: 11/25/2022]
Abstract
Hot-water soluble polysaccharides H-1-3 and H-2-1 were isolated from the thalli of the lichen Xanthoria parietina (L.) Th. Fr. and purified by ion exchange and gel permeation chromatography. Structure elucidation was mainly based on 2D-NMR and nano-ESI-Q-TOF MS/MS experiments. H-1-3 (13.7 kDa) was shown to be linear α-glucan with α-d-Glcp-(1 → [→[4)-α-d-Glcp-(1]2 → [6)-α-d-Glcp-(1]3 → 4)]n core backbone. The (1,4)- and (1,6)-α-d-Glcp linkages were in a 2:3 M ratio. H-2-1 (525 kDa) was characterized as a complex branched β-galacto-α-mannan with →[6)-α-d-Manp-(1 → [2,6)-α-d-Manp-(1]2 → [2)-α-d-Manp-(1]2→]n core units and main side chains of (1,3)-β-d-Galf linked at O-6 to →2)-α-d-Manp-(1→, together with minor terminal units of 1,4/1,6-α-D -Glcp units attached to the core chain at O-6 position and α-L-Rhap linked to Galf side chain at O-2 position (Manp: Galf: Glcp: Rhap linkage ratio = 9:3:2:1). H-2-1 exerted strong immunoactivity in vitro and activated murine RAW macrophages 264.7 towards significantly increased phagocytosis, TNF-α and IL-1β secretion. These effects are due to an interaction of the galactomannan with the transmembrane pattern-recognition protein Dectin-2 of the macrophages.
Collapse
Affiliation(s)
- Zalilawati Mat Rashid
- University of Münster, Institute of Pharmaceutical Biology and Phytochemistry, Corrensstrasse 48, D-48149 Münster, Germany
| | - Michael Mormann
- University of Münster, Institute for Hygiene, Robert-Koch-Strasse 41, D-48149 Münster, Germany
| | - Katja Steckhan
- University of Münster, Institute for Hygiene, Robert-Koch-Strasse 41, D-48149 Münster, Germany
| | - Alena Peters
- University of Münster, Institute of Pharmaceutical Biology and Phytochemistry, Corrensstrasse 48, D-48149 Münster, Germany
| | - Stefan Esch
- University of Münster, Institute of Pharmaceutical Biology and Phytochemistry, Corrensstrasse 48, D-48149 Münster, Germany
| | - Andreas Hensel
- University of Münster, Institute of Pharmaceutical Biology and Phytochemistry, Corrensstrasse 48, D-48149 Münster, Germany.
| |
Collapse
|
17
|
Kottom TJ, Hebrink DM, Jenson PE, Marsolek PL, Wüthrich M, Wang H, Klein B, Yamasaki S, Limper AH. Dectin-2 Is a C-Type Lectin Receptor that Recognizes Pneumocystis and Participates in Innate Immune Responses. Am J Respir Cell Mol Biol 2018; 58:232-240. [PMID: 28886250 DOI: 10.1165/rcmb.2016-0335oc] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pneumocystis is an important fungal pathogen that causes life-threatening pneumonia in patients with AIDS and malignancy. Lung fungal pathogens are recognized by C-type lectin receptors (CLRs), which bind specific ligands and stimulate innate immune responses. The CLR Dectin-1 was previously shown to mediate immune responses to Pneumocystis spp. For this reason, we investigated a potential role for Dectin-2. Rats with Pneumocystis pneumonia (PCP) exhibited elevated Dectin-2 mRNA levels. Soluble Dectin-2 carbohydrate-recognition domain fusion protein showed binding to intact Pneumocystis carinii (Pc) and to native Pneumocystis major surface glycoprotein/glycoprotein A (Msg/gpA). RAW macrophage cells expressing V5-tagged Dectin-2 displayed enhanced binding to Pc and increased protein tyrosine phosphorylation. Furthermore, the binding of Pc to Dectin-2 resulted in Fc receptor-γ-mediated intracellular signaling. Alveolar macrophages from Dectin-2-deficient mice (Dectin-2-/-) showed significant decreases in phospho-Syk activation after challenge with Pc cell wall components. Stimulation of Dectin-2-/- alveolar macrophages with Pc components showed significant decreases in the proinflammatory cytokines IL-6 and TNF-α. Finally, during infection with Pneumocystis murina, Dectin-2-/- mice displayed downregulated mRNA expression profiles of other CLRs implicated in fungal immunity. Although Dectin-2-/- alveolar macrophages had reduced proinflammatory cytokine release in vitro, Dectin-2-/- deficiency did not reduce the overall resistance of these mice in the PCP model, and organism burdens were statistically similar in the long-term immunocompromised and short-term immunocompetent PCP models. These results suggest that Dectin-2 participates in the initial innate immune signaling response to Pneumocystis, but its deficiency does not impair resistance to the organism.
Collapse
Affiliation(s)
- Theodore J Kottom
- 1 Thoracic Diseases Research Unit, Departments of Medicine and Biochemistry, Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Deanne M Hebrink
- 1 Thoracic Diseases Research Unit, Departments of Medicine and Biochemistry, Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Paige E Jenson
- 1 Thoracic Diseases Research Unit, Departments of Medicine and Biochemistry, Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Paige L Marsolek
- 1 Thoracic Diseases Research Unit, Departments of Medicine and Biochemistry, Mayo Clinic College of Medicine, Rochester, Minnesota
| | | | | | - Bruce Klein
- 2 Department of Pediatrics.,3 Department of Internal Medicine, and.,4 Department of Medical Microbiology and Immunology, University of Wisconsin Medical School, University of Wisconsin Hospital and Clinics, Madison, Wisconsin; and
| | - Sho Yamasaki
- 5 Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Andrew H Limper
- 1 Thoracic Diseases Research Unit, Departments of Medicine and Biochemistry, Mayo Clinic College of Medicine, Rochester, Minnesota
| |
Collapse
|
18
|
Sato W, Ishibashi KI, Yamanaka D, Adachi Y, Ohno N. Effects of Natural and Chemically Defined Nutrients on Candida albicans Water-soluble Fraction (CAWS) Vasculitis in Mice. Med Mycol J 2017; 58:E47-E62. [PMID: 28566659 DOI: 10.3314/mmj.16-00014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Kawasaki disease (KD) is an inflammatory disease that was identified by Professor Tomisaku Kawasaki in 1961. Candida albicans-derived substances, such as C. albicans water-soluble fraction (CAWS) , induce coronary arteritis similar to KD in mice. CAWS functions as a pathogen-associated molecular pattern (PAMP) by acting as a ligand for dectin-2. A gut-associated immunological system has developed specifically to segregate advantageous and detrimental stimuli, and the microbial flora has been found to markedly affect the development and severity of diseases. We herein investigated whether diet affects the onset and progression of CAWS vasculitis in mice. A standard diet, CE-2, and chemically defined diet, AIN93G, which is free of β-glucan, were used. Although all mice administered with CAWS died, the mean number of survival days was smaller in the AIN93G group because vasculitis was induced earlier than in the CE-2 group. Bacteroides, which are inflammatory flora, were enriched in the microbial flora of the AIN93G group. The results of the present study suggest that diet quality affects not only microbial flora changes, but also the progression of systemic disease.
Collapse
Affiliation(s)
- Wataru Sato
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | | | - Daisuke Yamanaka
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Yoshiyuki Adachi
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Naohito Ohno
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| |
Collapse
|
19
|
Chen SM, Shen H, Zhang T, Huang X, Liu XQ, Guo SY, Zhao JJ, Wang CF, Yan L, Xu GT, Jiang YY, An MM. Dectin-1 plays an important role in host defense against systemic Candida glabrata infection. Virulence 2017; 8:1643-1656. [PMID: 28658592 DOI: 10.1080/21505594.2017.1346756] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Candida glabrata is the second most common pathogen of severe candidiasis in immunocompromised hosts, following C. albicans. Although C. glabrata and C. albicans belong to the same genus, they are phylogenetically distinct. C-type lectin receptors (CLRs), acting as pattern-recognition receptors (PRRs), play critical roles in host defense against C. albicans infections. However, our understanding of the specific roles of CLRs in host defense against C. glabrata is limited. Here, we explored the potential roles of the C-type lectins Dectin-1 and Dectin-2 in host defense against C. glabrata. We found that both Dectin-1-deficient mice (Dectin-1-/-) and Dectin-2-deficient mice (Dectin-2-/-) are more susceptible to C. glabrata infection. Dectin-1confers host higher sensitivity for sensing C. glabrata infections, while the effect of Dectin-2 in the host defense against C. glabrata is infection dose dependent. Dectin-1 is required for host myeloid cells recognition, killing of C. glabrata, and development of subsequent Th1 and Th17 cell-mediated adaptive immune response. Significantly impaired inflammatory responses such as inflammatory cells recruitment and cytokines release that were induced by C. glabrata were manifested in Dectin-1-deficient mice. Together, our study demonstrates that Dectin-1 plays an important role in host defense against systemic Candida glabrata infections, indicating a previous unknown control mechanism for this particular type of infection in host. Our study, therefore, provides new insights into the host defense against C. glabrata.
Collapse
Affiliation(s)
- Si Min Chen
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China
| | - Hui Shen
- b Department of Laboratory Medicine , Shanghai East Hospital, Tongji University School of Medicine , Shanghai , P.R. China
| | - Teng Zhang
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China
| | - Xin Huang
- c Department of Dermatology , Shanghai Tongji Hospital, Tongji University School of Medicine , Shanghai , P.R. China
| | - Xiao Qi Liu
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China
| | - Shi Yu Guo
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China
| | - Jing Jun Zhao
- c Department of Dermatology , Shanghai Tongji Hospital, Tongji University School of Medicine , Shanghai , P.R. China
| | - Chun Fang Wang
- d R&D Center of New Drug, School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Lan Yan
- d R&D Center of New Drug, School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Guo Tong Xu
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China
| | - Yuan Ying Jiang
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China.,d R&D Center of New Drug, School of Pharmacy, Second Military Medical University , Shanghai , P.R. China
| | - Mao Mao An
- a Shanghai Tenth People's Hospital, and Department of Pharmacology , Tongji University School of Medicine , Shanghai , P.R. China
| |
Collapse
|
20
|
Bene KP, Kavanaugh DW, Leclaire C, Gunning AP, MacKenzie DA, Wittmann A, Young ID, Kawasaki N, Rajnavolgyi E, Juge N. Lactobacillus reuteri Surface Mucus Adhesins Upregulate Inflammatory Responses Through Interactions With Innate C-Type Lectin Receptors. Front Microbiol 2017; 8:321. [PMID: 28326063 PMCID: PMC5339304 DOI: 10.3389/fmicb.2017.00321] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 02/15/2017] [Indexed: 12/13/2022] Open
Abstract
The vertebrate gut symbiont Lactobacillus reuteri exhibits strain-specific adhesion and health-promoting properties. Here, we investigated the role of the mucus adhesins, CmbA and MUB, upon interaction of L. reuteri ATCC PTA 6475 and ATCC 53608 strains with human monocyte-derived dendritic cells (moDCs). We showed that mucus adhesins increased the capacity of L. reuteri strains to interact with moDCs and promoted phagocytosis. Our data also indicated that mucus adhesins mediate anti- and pro-inflammatory effects by the induction of interleukin-10 (IL-10), tumor necrosis factor alpha (TNF-α), IL-1β, IL-6, and IL-12 cytokines. L. reuteri ATCC PTA 6475 and ATCC 53608 were exclusively able to induce moDC-mediated Th1 and Th17 immune responses. We further showed that purified MUB activates moDCs and induces Th1 polarized immune responses associated with increased IFNγ production. MUB appeared to mediate these effects via binding to C-type lectin receptors (CLRs), as shown using cell reporter assays. Blocking moDCs with antibodies against DC-specific intercellular adhesion molecule 3-grabbing non-integrin (DC-SIGN) or Dectin-2 did not affect the uptake of the MUB-expressing strain, but reduced the production of TNF-α and IL-6 by moDCs significantly, in line with the Th1 polarizing capacity of moDCs. The direct interaction between MUB and CLRs was further confirmed by atomic force spectroscopy. Taken together these data suggest that mucus adhesins expressed at the cell surface of L. reuteri strains may exert immunoregulatory effects in the gut through modulating the Th1-promoting capacity of DCs upon interaction with C-type lectins.
Collapse
Affiliation(s)
- Krisztián P Bene
- Department of Immunology, Faculty of Medicine, University of Debrecen Debrecen, Hungary
| | - Devon W Kavanaugh
- The Gut Health and Food Safety Programme, Institute of Food Research Norwich, UK
| | - Charlotte Leclaire
- The Gut Health and Food Safety Programme, Institute of Food Research Norwich, UK
| | - Allan P Gunning
- The Gut Health and Food Safety Programme, Institute of Food Research Norwich, UK
| | - Donald A MacKenzie
- The Gut Health and Food Safety Programme, Institute of Food Research Norwich, UK
| | | | - Ian D Young
- Food and Health Programme, Institute of Food Research Norwich, UK
| | | | - Eva Rajnavolgyi
- Department of Immunology, Faculty of Medicine, University of Debrecen Debrecen, Hungary
| | - Nathalie Juge
- The Gut Health and Food Safety Programme, Institute of Food Research Norwich, UK
| |
Collapse
|
21
|
Kimura Y, Inoue A, Hangai S, Saijo S, Negishi H, Nishio J, Yamasaki S, Iwakura Y, Yanai H, Taniguchi T. The innate immune receptor Dectin-2 mediates the phagocytosis of cancer cells by Kupffer cells for the suppression of liver metastasis. Proc Natl Acad Sci U S A 2016; 113:14097-102. [PMID: 27872290 DOI: 10.1073/pnas.1617903113] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tumor metastasis is the cause of most cancer deaths. Although metastases can form in multiple end organs, the liver is recognized as a highly permissive organ. Nevertheless, there is evidence for immune cell-mediated mechanisms that function to suppress liver metastasis by certain tumors, although the underlying mechanisms for the suppression of metastasis remain elusive. Here, we show that Dectin-2, a C-type lectin receptor (CLR) family of innate receptors, is critical for the suppression of liver metastasis of cancer cells. We provide evidence that Dectin-2 functions in resident macrophages in the liver, known as Kupffer cells, to mediate the uptake and clearance of cancer cells. Interestingly, Kupffer cells are selectively endowed with Dectin-2-dependent phagocytotic activity, with neither bone marrow-derived macrophages nor alveolar macrophages showing this potential. Concordantly, subcutaneous primary tumor growth and lung metastasis are not affected by the absence of Dectin-2. In addition, macrophage C-type lectin, a CLR known to be complex with Dectin-2, also contributes to the suppression of liver metastasis. Collectively, these results highlight the hitherto poorly understood mechanism of Kupffer cell-mediated control of metastasis that is mediated by the CLR innate receptor family, with implications for the development of anticancer therapy targeting CLRs.
Collapse
|
22
|
Singh A, Lelis F, Braig S, Schäfer I, Hartl D, Rieber N. Differential Regulation of Myeloid-Derived Suppressor Cells by Candida Species. Front Microbiol 2016; 7:1624. [PMID: 27790210 PMCID: PMC5061774 DOI: 10.3389/fmicb.2016.01624] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/29/2016] [Indexed: 12/25/2022] Open
Abstract
Myeloid-derived suppressor cells (MDSCs) are innate immune cells characterized by their ability to suppress T-cell responses. Recently, we demonstrated that the human-pathogenic fungi Candida albicans and Aspergillus fumigatus induced a distinct subset of neutrophilic MDSCs. To dissect Candida-mediated MDSC induction in more depth, we studied the relative efficacy of different pathogenic non-albicans Candida species to induce and functionally modulate neutrophilic MDSCs, including C. glabrata, C. parapsilosis, C. dubliniensis, and C. krusei. Our data demonstrate that the extent of MDSC generation is largely dependent on the Candida species with MDSCs induced by C. krusei and C. glabrata showing a higher suppressive activity compared to MDSCs induced by C. albicans. In summary, these studies show that fungal MDSC induction is differentially regulated at the species level and differentially affects effector T-cell responses.
Collapse
Affiliation(s)
- Anurag Singh
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of Tübingen Tübingen, Germany
| | - Felipe Lelis
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of Tübingen Tübingen, Germany
| | - Stefanie Braig
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of Tübingen Tübingen, Germany
| | - Iris Schäfer
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of Tübingen Tübingen, Germany
| | - Dominik Hartl
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of Tübingen Tübingen, Germany
| | - Nikolaus Rieber
- University Children's Hospital and Interdisciplinary Center for Infectious Diseases, University of TübingenTübingen, Germany; Department of Pediatrics, Kinderklinik München Schwabing, StKM GmbH und Klinikum rechts der Isar, Technische Universität MünchenMunich, Germany
| |
Collapse
|
23
|
Oosting M, Buffen K, Cheng SC, Verschueren IC, Koentgen F, van de Veerdonk FL, Netea MG, Joosten LAB. Borrelia-induced cytokine production is mediated by spleen tyrosine kinase (Syk) but is Dectin-1 and Dectin-2 independent. Cytokine 2015; 76:465-72. [PMID: 26297607 DOI: 10.1016/j.cyto.2015.08.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 08/03/2015] [Accepted: 08/13/2015] [Indexed: 12/13/2022]
Abstract
Although it is known that Borrelia species express sugar-like structures on their outer surface, not much is known about the role of these structures in immune recognition by host cells. Fungi, like Candida albicans, are mainly recognized by C-type lectin receptors, in specific Dectin-1 and Dectin-2. In this study we assessed the role of Dectin-1 and Dectin-2 in the recognition process of Borrelia spirochetes. Using specific inhibitors against these receptors on human cells did not influenced cytokine production. Individuals carrying a SNP leading to an early stop codon in the DECTIN-1 gene also did not lead to differential induction of Borrelia-dependent cytokines. After injection of live Borrelia into knee joints of Dectin-2 deficient mice a trend towards lower inflammation was observed. Inhibition of Syk in human cells resulted in lower cytokine production after Borrelia stimulation. In conclusion, Dectin-1 and Dectin-2 seem not to play a major role in Borrelia recognition or Borrelia-induced inflammation. However, Syk seems to be involved in Borrelia-induced cytokine production.
Collapse
|
24
|
Wüthrich M, Wang H, Li M, Lerksuthirat T, Hardison SE, Brown GD, Klein B. Fonsecaea pedrosoi-induced Th17-cell differentiation in mice is fostered by Dectin-2 and suppressed by Mincle recognition. Eur J Immunol 2015; 45:2542-52. [PMID: 26140582 PMCID: PMC4562893 DOI: 10.1002/eji.201545591] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 06/08/2015] [Accepted: 06/29/2015] [Indexed: 12/11/2022]
Abstract
Chromoblastomycosis is a chronic skin infection caused by the pigmented saprophytic mould Fonsecaea pedrosoi. Chronicity of infection can be broken by a coordinated innate recognition of the spores by pattern recognition receptors. While Mincle signaling via the Syk/Card9 pathway is required for fungal recognition by host cells, it is not sufficient for host control. Exogenously applied TLR agonists are necessary to promote the induction of proinflammatory cytokines and clearance of infection in vivo. Here, we investigated whether costimulation by TLR agonists fosters the development of adaptive immune responses, by examining the development of fungus‐specific T cells. Subcutaneous infection of mice with F. pedrosoi spores induced the activation, expansion, and differentiation of Ag‐specific CD4+ T cells but TLR costimulation did not further augment these T‐cell responses. The Dectin‐2/FcRγ/Card9 signaling pathway promoted the differentiation of fungus‐specific CD4+ T cells into Th17 cells, whereas Mincle inhibited the development of this T‐helper subset in infected mice. These results indicate differential roles for Dectin‐2 and Mincle in the generation of adaptive immune responses to F. pedrosoi infection.
Collapse
Affiliation(s)
- Marcel Wüthrich
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA
| | - Huafeng Wang
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA
| | - Mengyi Li
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA
| | - Tassanee Lerksuthirat
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA
| | - Sarah E Hardison
- Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA
| | - Gordon D Brown
- Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA
| | - Bruce Klein
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA.,Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, WI, USA.,Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| |
Collapse
|
25
|
Hu XP, Wang RY, Wang X, Cao YH, Chen YQ, Zhao HZ, Wu JQ, Weng XH, Gao XH, Sun RH, Zhu LP. Dectin-2 polymorphism associated with pulmonary cryptococcosis in HIV-uninfected Chinese patients. Med Mycol 2015; 53:810-6. [PMID: 26129889 DOI: 10.1093/mmy/myv043] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 05/12/2015] [Indexed: 12/26/2022] Open
Abstract
Dectin-2 is a C-type lectin receptor that can recognize critical structures of fungi and involve in the host immune response after pulmonary fungal infections. We aimed to investigate the association between Dectin-2 genetic polymorphisms and cryptococcosis among a series of human immunodeficiency virus (HIV)-uninfected Chinese patients. In this case control study, a total of 251 patients with cryptococcosis and 464 healthy controls were included. One tag-single nucleotide polymorphism (SNP) (rs11045418) located at 5'-flanking region of Dectin-2 gene was selected and genotyped in this study. Among 251 patients, there were 108 (43%) meningitis patients including 73 (67.7%) healthy ones, 74 (29.5%) pulmonary infected patients including 49 (66.2%) healthy ones, and 69 (27.5%) patients with both neural and pulmonary infection including 38 (55.1%) immunocompetent ones. One hundred and forty-three (74 plus 69) patients with pulmonary cryptococcosis and 177 (108 plus 69) patients with cryptococcal meningitis were compared with controls, respectively. Three samples from 143 pulmonary infected patients failed in genotyping. There was a significant difference between 86 immunocompetent pulmonary infected patients and controls in the overdominant model (C/T vs. T/T + C/C; OR, 0.59; 95%CI, 0.37-0.94; P, .026). Similar but not significant difference was found between the overall pulmonary infected patients and the controls in the overdominant model (OR, 0.77; 95%CI, 0.52-1.12; P, .17). No such difference was found between controls and patients with cryptococcal meningitis. Our study firstly showed a genetic association between Dectin-2 and pulmonary cryptococcosis.
Collapse
Affiliation(s)
- Xiu-Ping Hu
- Intensive Care Unit, Zhejiang Provincial People's Hospital, Hangzhou, China Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Rui-Ying Wang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Xuan Wang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Ya-Hui Cao
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Yan-Qiong Chen
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Hua-Zhen Zhao
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Ji-Qin Wu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Xin-Hua Weng
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | | | - Ren-Hua Sun
- Intensive Care Unit, Zhejiang Provincial People's Hospital, Hangzhou, China
| | - Li-Ping Zhu
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| |
Collapse
|
26
|
Norimoto A, Hirose K, Iwata A, Tamachi T, Yokota M, Takahashi K, Saijo S, Iwakura Y, Nakajima H. Dectin-2 promotes house dust mite-induced T helper type 2 and type 17 cell differentiation and allergic airway inflammation in mice. Am J Respir Cell Mol Biol 2014; 51:201-9. [PMID: 24588637 DOI: 10.1165/rcmb.2013-0522oc] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The fact that sensitization against fungi is closely related to the severity of asthma suggests that immune systems recognizing fungi are involved in the pathogenesis of severe asthma. Recently, Dectin-2 (gene symbol, Clec4n), a C-type lectin receptor, has been shown to function as not only a major pattern-recognition receptor for fungi, but also a receptor for some components of house dust mite (HDM) extract, a major allergen for asthma. However, the roles of Dectin-2 in the induction of HDM-induced allergic airway inflammation remain largely unknown. Our objective was to determine the roles of Dectin-2 in HDM-induced allergic airway inflammation. We examined the roles of Dectin-2 in the induction of HDM-induced T helper (Th) 2 and Th17 cell differentiation and subsequent allergic airway inflammation by using Clec4n-deficient (Clec4n(-/-)) mice. We also investigated Dectin-2-expressing cells in the lung and their roles in HDM-induced allergic airway inflammation. Clec4n(-/-) mice showed significantly attenuated HDM-induced allergic airway inflammation and decreased Th2 and Th17 cell differentiation. Dectin-2 mRNA, together with Dectin-3 and Fc receptor-γ mRNAs, was expressed in CD11b(+) dendritic cells (DCs), but not in CD4(+) T cells or epithelial cells in the lung. CD11b(+) DCs isolated from Clec4n(-/-) mice expressed lower amounts of proinflammatory cytokines and costimulatory molecules, which could lead to Th2 and Th17 cell differentiation than those from wild-type mice. HDM-pulsed Clec4n(-/-) DCs were less efficient for the induction of allergic airway inflammation than HDM-pulsed wild-type DCs. In conclusion, Dectin-2 expressed on CD11b(+) DCs promotes HDM-induced Th2 and Th17 cell differentiation and allergic airway inflammation.
Collapse
Affiliation(s)
- Ayako Norimoto
- 1 Department of Allergy and Clinical Immunology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Sun H, Xu XY, Shao HT, Su X, Wu XD, Wang Q, Shi Y. Dectin-2 is predominately macrophage restricted and exhibits conspicuous expression during Aspergillus fumigatus invasion in human lung. Cell Immunol 2013; 284:60-7. [PMID: 23928558 DOI: 10.1016/j.cellimm.2013.06.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 06/23/2013] [Accepted: 06/24/2013] [Indexed: 12/24/2022]
Abstract
We investigated the features of Dectin-2 expression both at transcriptional and translational levels during Aspergillus fumigatus infection in human lung. Simultaneously, the expression of CD206 was assayed as an activated marker of alveolar macrophages. The characteristic of Dectin-2 expression were then confirmed in Monocyte-derived macrophages (MDM) after A. fumigatus stimulation by Flow Cytometry. We found that the expression of Dectin-2 was low in normal lung, while it revealed a markedly up-regulation during A. fumigatus invasion. Dectin-2 expression was predominantly restricted to CD206 positive cells. There was salient positive correlation between Dectin-2 expression and CD206. We conclude that Dectin-2 expression is largely restricted to alveolar macrophages in human lung. The conspicuous expression of Dectin-2 during A. fumigatus invasion suggests its notable contribution to antifungal defenses in pulmonary aspergillosis.
Collapse
Affiliation(s)
- He Sun
- Department of Respiratory and Critical Care Medicine, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University, Nanjing 210002, China
| | | | | | | | | | | | | |
Collapse
|