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Dellière S, Chauvin C, Wong SSW, Gressler M, Possetti V, Parente R, Fontaine T, Krüger T, Kniemeyer O, Bayry J, Carvalho A, Brakhage AA, Inforzato A, Latgé JP, Aimanianda V. Interplay between host humoral pattern recognition molecules controls undue immune responses against Aspergillus fumigatus. Nat Commun 2024; 15:6966. [PMID: 39138196 PMCID: PMC11322389 DOI: 10.1038/s41467-024-51047-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 07/29/2024] [Indexed: 08/15/2024] Open
Abstract
Pentraxin 3 (PTX3), a long pentraxin and a humoral pattern recognition molecule (PRM), has been demonstrated to be protective against Aspergillus fumigatus, an airborne human fungal pathogen. We explored its mode of interaction with A. fumigatus, and the resulting implications in the host immune response. Here, we demonstrate that PTX3 interacts with A. fumigatus in a morphotype-dependent manner: (a) it recognizes germinating conidia through galactosaminogalactan, a surface exposed cell wall polysaccharide of A. fumigatus, (b) in dormant conidia, surface proteins serve as weak PTX3 ligands, and (c) surfactant protein D (SP-D) and the complement proteins C1q and C3b, the other humoral PRMs, enhance the interaction of PTX3 with dormant conidia. SP-D, C3b or C1q opsonized conidia stimulated human primary immune cells to release pro-inflammatory cytokines and chemokines. However, subsequent binding of PTX3 to SP-D, C1q or C3b opsonized conidia significantly decreased the production of pro-inflammatory cytokines/chemokines. PTX3 opsonized germinating conidia also significantly lowered the production of pro-inflammatory cytokines/chemokines while increasing IL-10 (an anti-inflammatory cytokine) released by immune cells when compared to the unopsonized counterpart. Overall, our study demonstrates that PTX3 recognizes A. fumigatus either directly or by interplaying with other humoral PRMs, thereby restraining detrimental inflammation. Moreover, PTX3 levels were significantly higher in the serum of patients with invasive pulmonary aspergillosis (IPA) and COVID-19-associated pulmonary aspergillosis (CAPA), supporting previous observations in IPA patients, and suggesting that it could be a potential panel-biomarker for these pathological conditions caused by A. fumigatus.
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Affiliation(s)
- Sarah Dellière
- Institut Pasteur, Université Paris Cité, CNRS UMR2000, Unité Mycologie Moléculaire, Paris, France
- Laboratoire de Parasitologie-Mycologie, AP-HP, Hôpital Saint-Louis, Paris, France
- Institut Pasteur, Université Paris Cité, Immunobiology of Aspergillus, Paris, France
| | - Camille Chauvin
- Institut National de la Santé et de la Recherche Médicale, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris-Cité, Paris, France
| | - Sarah Sze Wah Wong
- Institut Pasteur, Université Paris Cité, CNRS UMR2000, Unité Mycologie Moléculaire, Paris, France
- Institut Pasteur, Unité des Aspergillus, Paris, France
| | - Markus Gressler
- Institut Pasteur, Unité des Aspergillus, Paris, France
- Faculty of Biological Sciences, Pharmaceutical Microbiology, Friedrich Schiller University Jena, Winzerlaer Strasse 2, 07745, Jena, Germany; Pharmaceutical Microbiology, Leibniz Institute for Natural Product Research, and Infection Biology-Hans-Knöll-Institute, Winzerlaer Strasse 2, Jena, Germany
| | - Valentina Possetti
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | | | - Thierry Fontaine
- Institut Pasteur, Unité des Aspergillus, Paris, France
- Institut Pasteur, Université Paris Cité, Unité Biologie et Pathogénicité Fongiques, Paris, France
| | - Thomas Krüger
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research, and Infection Biology (Leibniz-HKI), Jena, Germany
| | - Olaf Kniemeyer
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research, and Infection Biology (Leibniz-HKI), Jena, Germany
| | - Jagadeesh Bayry
- Institut National de la Santé et de la Recherche Médicale, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris-Cité, Paris, France
- Department of Biological Sciences and Engineering, Indian Institute of Technology Palakkad, Palakkad, India
| | - Agostinho Carvalho
- Life & Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Axel A Brakhage
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research, and Infection Biology (Leibniz-HKI), Jena, Germany
- Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Antonio Inforzato
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | | | - Vishukumar Aimanianda
- Institut Pasteur, Université Paris Cité, CNRS UMR2000, Unité Mycologie Moléculaire, Paris, France.
- Institut Pasteur, Université Paris Cité, Immunobiology of Aspergillus, Paris, France.
- Institut Pasteur, Unité des Aspergillus, Paris, France.
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Jentsch MC, Keilhaue A, Wagner B, Rhyner C, Lübke S, Karagulyan M, Arnold C, Lohmann KL, Schnabel CL. Aspergillus fumigatus binding IgA and IgG1 are increased in bronchoalveolar lavage fluid of horses with neutrophilic asthma. Front Immunol 2024; 15:1406794. [PMID: 38953030 PMCID: PMC11215007 DOI: 10.3389/fimmu.2024.1406794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 05/24/2024] [Indexed: 07/03/2024] Open
Abstract
Introduction Equine asthma (EA) is a common lower airway disease in horses, but whether its pathogenesis is allergic is ambiguous. Extrinsic stimuli like hay dust induce acute exacerbation of clinical signs and sustained local neutrophilic inflammation in susceptible horses. Aspergillus fumigatus is an EA stimulus, but it is unclear if it merely acts as an IgE-provoking allergen. We aimed to comprehensively analyze immunoglobulin (Ig) isotypes in EA, elucidating their binding to different A. fumigatus antigens, and their quantities systemically in serum and locally in bronchoalveolar lavage fluid (BALF). Methods Serum and BALF from healthy horses (HE, n = 18) and horses with mild-moderate asthma (MEA, n = 20) or severe asthma (SEA, n = 24) were compared. Ig isotype (IgG1, IgG3/5, IgG4/7, IgG6, IgA, and IgE) binding to nine antigens (A. fumigatus lysate, and recombinant Asp f 1, Asp f 7, Asp f 8, dipeptidyl-peptidase 5, class II aldolase/adducin domain protein, glucoamylase, beta-hexosaminidase, and peptide hydrolase) was compared by enzyme-linked immunosorbent assays. Total Ig isotype contents were determined by bead-based assays. Results MEA and SEA differed from HE but hardly from each other. Compared to HE, asthmatic horses showed increased anti-A. fumigatus binding of IgG (BALF and serum) and IgA (BALF). Serum and BALF IgE binding and total IgE contents were similar between HE and EA. Single antigens, as well as A. fumigatus lysate, yielded similar Ig binding patterns. Serum and BALF IgG1 binding to all antigens was increased in SEA and to several antigens in MEA. Serum IgG4/7 binding to two antigens was increased in SEA. BALF IgA binding to all antigens was increased in SEA and MEA. Total BALF IgG1 and IgG4/7 contents were increased in SEA, and serum IgG4/7 content was increased in MEA compared to HE. Yet, total isotype contents differentiated EA and HE less clearly than antigen-binding Ig. Discussion A. fumigatus immunogenicity was confirmed without identification of single dominant antigens here. A. fumigatus provoked elevated BALF IgG1 and IgA binding, and these isotypes appear relevant for neutrophilic EA, which does not support allergy. BALF Ig isotype differentiation beyond IgE is crucial for a comprehensive analysis of immune responses to fungi in EA pathogenesis.
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Affiliation(s)
- Maria-Christin Jentsch
- Institute of Immunology, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
| | - Aline Keilhaue
- Institute of Immunology, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
| | - Bettina Wagner
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, United States
| | - Claudio Rhyner
- Christine Kühne Center for Allergy, Research, and Education (CK-CARE), Davos, Switzerland
- Swiss Institute of Allergy and Asthma Research (SIAF), Davos, Switzerland
| | - Sabrina Lübke
- Institute of Immunology, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
| | - Mariam Karagulyan
- Institute of Immunology, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
| | - Corinna Arnold
- Department for Horses, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
| | - Katharina L. Lohmann
- Department for Horses, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
| | - Christiane L. Schnabel
- Institute of Immunology, Faculty of Veterinary Medicine, Leipzig University, Leipzig, Germany
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White PL. Developments in Fungal Serology. CURRENT FUNGAL INFECTION REPORTS 2023; 17:1-12. [PMID: 37360856 PMCID: PMC10099008 DOI: 10.1007/s12281-023-00462-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2023] [Indexed: 06/28/2023]
Abstract
Purpose of Review The true incidence of fungal disease is hampered by conventionally poor diagnostic tests, limited access to advanced diagnostics, and limited surveillance. The availability of serological testing has been available for over two decades and generally underpins the modern diagnosis of the most common forms of fungal disease. This review will focus on technical developments of serological tests for the diagnosis of fungal disease, describing advances in clinical performance when available. Recent Findings Despite their longevity, technical, clinical, and performance limitations remain, and tests specific for fungal pathogens outside the main pathogens are lacking. The availability of LFA and automated systems, capable of running multiple different tests, represents significant developments, but clinical performance data is variable and limited. Summary Fungal serology has significantly advanced the diagnosis of the main fungal infections, with LFA availability increasing accessibility to testing. Combination testing has the potential to overcome performance limitations.
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Affiliation(s)
- P. Lewis White
- Public Health Wales Mycology Reference Laboratory and Cardiff University Centre for Trials Research/Division of Infection and Immunity, UHW, Heath Park, Cardiff, CF14 4XW UK
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Shinfuku K, Suzuki J, Takeda K, Kawashima M, Morio Y, Sasaki Y, Nagai H, Watanabe A, Matsui H, Kamei K. Validity of Platelia Aspergillus IgG and Aspergillus Precipitin Test To Distinguish Pulmonary Aspergillosis from Colonization. Microbiol Spectr 2023; 11:e0343522. [PMID: 36475776 PMCID: PMC9927562 DOI: 10.1128/spectrum.03435-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 11/12/2022] [Indexed: 12/14/2022] Open
Abstract
When Aspergillus, an ubiquitous, saprophytic fungus, is detected in respiratory tract specimens collected from chronic respiratory disease patients, it is important to determine whether it is a true infection or colonization. We investigated the usefulness of the Bio-Rad Platelia Aspergillus IgG (Platelia Aspergillus IgG) enzyme-linked immunosorbent assay (ELISA) method and the Aspergillus precipitin test to distinguish pulmonary aspergillosis from colonization. Between January 2017 and November 2021, 51 confirmed, untreated pulmonary aspergillosis (33 chronic pulmonary aspergillosis [CPA] and 18 allergic bronchopulmonary aspergillosis [ABPA]) and 77 colonization patients were included in this study. At first, the conventional cutoff value was utilized in assessing the validity of the two antibody tests for distinguishing pulmonary aspergillosis from colonization. The Platelia Aspergillus IgG cutoff value was then reevaluated to fit this situation. Finally, differences in test accuracy dependent on Aspergillus species were assessed for both antibody tests by comparing cases with Aspergillus fumigatus complex and those with non-fumigatus Aspergillus complex. Both antibody tests demonstrated significantly higher positive rates for pulmonary aspergillosis (P < 0.0001) than colonization. The cutoff value should be 15.7 arbitrary units (AU)/mL to best distinguish infection from colonization, which was higher than the conventional value of 10 AU/mL. The diagnostic sensitivity of Platelia Aspergillus IgG for the non-fumigatus Aspergillus complex was inferior to the A. fumigatus complex (P = 0.019). In conclusion, both Aspergillus antibody tests were valid to distinguish infection from colonization, although we should note the higher cutoff value for Platelia Aspergillus IgG and the lower sensitivity in cases of non-fumigatus Aspergillus infection. IMPORTANCE Pulmonary aspergillosis is the most common pulmonary fungal infection. However, Aspergillus is a ubiquitous, saprophytic fungus; it can be detected in respiratory specimens even in the absence of infection. Especially since Aspergillus is detected in respiratory specimens collected from patients with chronic respiratory disease, it is important to determine whether it is true infection or colonization. We investigated the validity of the Platelia Aspergillus IgG ELISA method and the Aspergillus precipitin test to distinguish pulmonary aspergillosis from colonization. Both antibody tests were considered useful in differentiating true infection from colonization in respiratory practice. The appropriate cutoff value for Platelia Aspergillus IgG was higher than the conventional value, and it was also noted that the sensitivity of both antibody tests for non-fumigatus Aspergillus complex was low. This study will be significant in real-world clinical practice of pulmonary aspergillosis using antibody tests in respiratory care.
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Affiliation(s)
- Kyota Shinfuku
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Junko Suzuki
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Keita Takeda
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Masahiro Kawashima
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Yoshiteru Morio
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Yuka Sasaki
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Hideaki Nagai
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Akira Watanabe
- Division of Clinical Research, Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Hirotoshi Matsui
- Center for Pulmonary Diseases, National Hospital Organization Tokyo National Hospital, Tokyo, Japan
| | - Katsuhiko Kamei
- Division of Clinical Research, Medical Mycology Research Center, Chiba University, Chiba, Japan
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Anan K, Kataoka Y, Okabayashi S, Yamamoto R, Namkoong H, Yamamoto Y. Diagnostic accuracy of Aspergillus-specific antibodies for chronic pulmonary aspergillosis: A systematic review and meta-analysis. Mycoses 2021; 64:701-715. [PMID: 33594774 DOI: 10.1111/myc.13253] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/28/2021] [Accepted: 02/03/2021] [Indexed: 12/14/2022]
Abstract
We performed this study to provide the latest evidence of the diagnostic accuracy of all Aspergillus antibodies for chronic pulmonary aspergillosis (CPA). In this meta-analysis, we searched the Cochrane Central Register of Controlled Trials, MEDLINE, Embase, and other databases, until 19 March 2020, for studies that examined the diagnostic accuracy of each Aspergillus-specific antibody for CPA and assessed the risk of bias using the revised Quality Assessment of Diagnostic Accuracy Studies-2 tool. We integrated the results using a hierarchical summary receiver operating characteristic (HSROC) model and calculated the point estimates of specificity with sensitivity fixed at 0.90 using the HSROC curve. We identified 32 published and one unpublished studies, including 75 studies on five antibody test types: 18 of precipitin test (2810 participants), 46 of IgG (8197), three of IgA (283), six of IgM (733) and two of combined IgG and IgM (IgG + IgM) (920). The results of specificity with sensitivity fixed at 0.90 were as follows: precipitin test, 0.93 (95% credible intervals: 0.86, 1.00); IgG, 0.90 (0.86, 0.95); IgA, 0.74 (0.00, 1.00); IgM, 0.50 (0.37, 0.53); IgG + IgM, 0.47 (0.00, 1.00). However, the precipitin test showed imprecision and instability in the sensitivity analysis. Most studies had a high risk of bias due to the case-control design. Although there is lack of applicability for malignancy or immunosuppressive patients, our study suggests a preference for IgG over other antibody tests in CPA screening. Particularly, IgG should be used as an adjunct when ruling out CPA.
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Affiliation(s)
- Keisuke Anan
- Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Systematic Review Workshop Peer Support Group (SRWS-PSG), Osaka, Japan
| | - Yuki Kataoka
- Systematic Review Workshop Peer Support Group (SRWS-PSG), Osaka, Japan.,Department of Respiratory Medicine, Hyogo Prefectural Amagasaki General Medical Center, Hyogo, Japan.,Hospital Care Research Unit, Hyogo Prefectural Amagasaki General Medical Center, Hyogo, Japan
| | - Shinji Okabayashi
- Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ryohei Yamamoto
- Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ho Namkoong
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institute of Health, Bethesda, MD, USA.,Division of Pulmonary Medicine, Department of Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Yosuke Yamamoto
- Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Volpe Chaves CE, do Valle Leone de Oliveira SM, Venturini J, Grande AJ, Sylvestre TF, Poncio Mendes R, Mello Miranda Paniago A. Accuracy of serological tests for diagnosis of chronic pulmonary aspergillosis: A systematic review and meta-analysis. PLoS One 2020; 15:e0222738. [PMID: 32182249 PMCID: PMC7077827 DOI: 10.1371/journal.pone.0222738] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 01/21/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic pulmonary aspergillosis (CPA) is a slow and progressive disease that develops in preexisting lung cavities of patients with tuberculosis sequelae, and it is associated with a high mortality rate. Serological tests such as double agar gel immunodiffusion test (DID) or counterimmunoelectrophoresis (CIE) test have been routinely used for CPA diagnosis in the absence of positive cultures. However, these tests have been replaced with enzyme-linked immunoassay (ELISA) and, a variety of methods. This systematic review compares ELISA accuracy to reference test (DID and/or CIE) accuracy in CPA diagnosis. It was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). The study was registered in PROSPERO under the registration number CRD42016046057. We searched the electronic databases MEDLINE (PubMed), EMBASE (Elsevier), LILACS (VHL), Cochrane library, and ISI Web of Science. Gray literature was researched using Google Scholar and conference abstracts. We included articles with patients or serum samples from patients with CPA who underwent two serological tests: ELISA (index test) and IDD and/or CIE (reference test). We used the test accuracy as a result. Original articles were considered without a restriction of date or language. The pooled sensitivity, specificity, and summary receiver operating characteristic curves were estimated. We included 14 studies in the review, but only four were included in the meta-analysis. The pooled sensitivities and specificities were 0.93 and 0.97 for the ELISA test. These values were 0.64 and 0.99 for the reference test (DID and/or CIE). Analyses of summary receiver operating characteristic curves yielded 0.99 for ELISA and 0.99 for the reference test (DID and/or CIE). Our meta-analysis suggests that the diagnostic accuracy of ELISA is greater than the reference tests (DID and/or CIE) for early CPA detection.
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Affiliation(s)
- Cláudia Elizabeth Volpe Chaves
- Graduate Program in Infectious and Parasitic Diseases of Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- Regional Hospital of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - James Venturini
- Graduate Program in Infectious and Parasitic Diseases of Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Antonio Jose Grande
- State University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | - Tatiane Fernanda Sylvestre
- Tropical Diseases Department, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo State, Brazil
| | - Rinaldo Poncio Mendes
- Graduate Program in Infectious and Parasitic Diseases of Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- Tropical Diseases Department, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo State, Brazil
| | - Anamaria Mello Miranda Paniago
- Graduate Program in Infectious and Parasitic Diseases of Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
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Danion F, Aimanianda V, Bayry J, Duréault A, Wong SSW, Bougnoux ME, Tcherakian C, Alyanakian MA, Guegan H, Puel A, Picard C, Lortholary O, Lanternier F, Latgé JP. Aspergillus fumigatus Infection in Humans With STAT3-Deficiency Is Associated With Defective Interferon-Gamma and Th17 Responses. Front Immunol 2020; 11:38. [PMID: 32047500 PMCID: PMC6997434 DOI: 10.3389/fimmu.2020.00038] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/08/2020] [Indexed: 12/23/2022] Open
Abstract
In humans, loss-of-function mutation in the Signal Transducer and Activator of Transcription 3 (STAT3) gene is frequently associated with susceptibility to bacterial as well as fungal infections including aspergillosis, although its pathogenesis remains largely unknown. In the present study, we investigated the immune responses obtained after stimulation with Aspergillus fumigatus in STAT3-deficient patients. A. fumigatus conidial killing efficiencies of both monocytes and neutrophils isolated from whole blood samples of STAT3-deficient patients were not different compared to those of healthy controls. After stimulation with A. fumigatus conidia, lower concentrations of adaptive cytokines (IFN-γ, IL-17 and IL-22) were secreted by peripheral blood mononuclear cells from STAT3-deficient patients compared to those from healthy controls. Moreover, the frequency of IFN-γ and IL-17 producing CD4+ T cells was lower in STAT3-deficient patients vs. healthy controls. Among the STAT3-deficient patients, those with aspergillosis showed further lower secretion of IFN-γ upon stimulation of their PBMCs with A. fumigatus conidia compared to the patients without aspergillosis. Together, our study indicated that STAT3-deficiency leads to a defective adaptive immune response against A. fumigatus infection, particularly with a lower IFN-γ and IL-17 responses in those with aspergillosis, suggesting potential therapeutic benefit of recombinant IFN-γ in STAT3-deficient patients with aspergillosis.
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Affiliation(s)
- François Danion
- Université de Paris, Centre d'Infectiologie Necker Pasteur, IHU Imagine, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Paris, France.,Unité des Aspergillus, Institut Pasteur, Paris, France
| | | | - Jagadeesh Bayry
- Institut National de la Santé et de la Recherche Médicale, Centre de Recherche des Cordeliers, Equipe-Immunopathologie et Immunointervention Thérapeutique, Sorbonne Université, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Amélie Duréault
- Université de Paris, Centre d'Infectiologie Necker Pasteur, IHU Imagine, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Paris, France
| | | | - Marie-Elisabeth Bougnoux
- Unité de Parasitologie-Mycologie service de Microbiologie, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Université de Paris, Paris, France.,INRA USC 2019, Unite Biologie et Pathogenicite Fongiques, Institut Pasteur, INRA, Paris, France
| | | | - Marie-Alexandra Alyanakian
- Service d'Immunologie Biologique, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Université de Paris, Paris, France
| | - Hélène Guegan
- Laboratoire de Parasitologie-Mycologie, Centre Hospitalier Universitaire de Rennes, Rennes, France.,Univ Rennes, INSERM, IRSET (Institut de Recherche en santé, Environnement et travail) - UMR_S 1085, Rennes, France
| | - Anne Puel
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY, United States.,Génétique Humaine des Maladies Infectieuses, Hôpital Necker-Enfants Malades, INSERM U1163, Paris and Université de Paris, Imagine Institut, Paris, France
| | - Capucine Picard
- Centre d'étude des Déficits Immunitaires (CEDI), Centre de Référence des Déficits Immunitaires Héréditaires (CEREDIH), Unité d'Immuno-Hématologie, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Paris, France.,Université de Paris, Paris and Institut Imagine, INSERM UMR1163, Paris, France
| | - Olivier Lortholary
- Université de Paris, Centre d'Infectiologie Necker Pasteur, IHU Imagine, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Paris, France.,Institut Pasteur, CNRS, Centre National de Référence Mycoses Invasives et Antifongiques, Unité de Mycologie Moléculaire, UMR 2000, Paris, France
| | - Fanny Lanternier
- Université de Paris, Centre d'Infectiologie Necker Pasteur, IHU Imagine, Hôpital Necker-Enfants Malades, Assistance Publique- Hôpitaux de Paris (AP-HP), Paris, France.,St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, Rockefeller University, New York, NY, United States
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8
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Potential of Chemically Synthesized Oligosaccharides To Define the Carbohydrate Moieties of the Fungal Cell Wall Responsible for the Human Immune Response, Using Aspergillus fumigatus Galactomannan as a Model. mSphere 2020; 5:5/1/e00688-19. [PMID: 31915215 PMCID: PMC6952192 DOI: 10.1128/msphere.00688-19] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Methodologies to identify epitopes or ligands of the fungal cell wall polysaccharides influencing the immune response of human pathogens have to date been imperfect. Using the galactomannan (GM) of Aspergillus fumigatus as a model, we have shown that synthetic oligosaccharides of distinct structures representing key fragments of cell wall polysaccharides are the most precise tools to study the serological and immunomodulatory properties of a fungal polysaccharide. Methodologies to identify epitopes or ligands of the fungal cell wall polysaccharides influencing the immune response of human pathogens have to date been imperfect. Using the galactomannan (GM) of Aspergillus fumigatus as a model, we have shown that synthetic oligosaccharides of distinct structures representing key fragments of cell wall polysaccharides are the most precise tools to study the serological and immunomodulatory properties of a fungal polysaccharide.
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Abstract
Aspergillus fumigatus is a saprotrophic fungus; its primary habitat is the soil. In its ecological niche, the fungus has learned how to adapt and proliferate in hostile environments. This capacity has helped the fungus to resist and survive against human host defenses and, further, to be responsible for one of the most devastating lung infections in terms of morbidity and mortality. In this review, we will provide (i) a description of the biological cycle of A. fumigatus; (ii) a historical perspective of the spectrum of aspergillus disease and the current epidemiological status of these infections; (iii) an analysis of the modes of immune response against Aspergillus in immunocompetent and immunocompromised patients; (iv) an understanding of the pathways responsible for fungal virulence and their host molecular targets, with a specific focus on the cell wall; (v) the current status of the diagnosis of different clinical syndromes; and (vi) an overview of the available antifungal armamentarium and the therapeutic strategies in the clinical context. In addition, the emergence of new concepts, such as nutritional immunity and the integration and rewiring of multiple fungal metabolic activities occurring during lung invasion, has helped us to redefine the opportunistic pathogenesis of A. fumigatus.
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Affiliation(s)
- Jean-Paul Latgé
- School of Medicine, University of Crete, Heraklion, Crete, Greece
| | - Georgios Chamilos
- School of Medicine, University of Crete, Heraklion, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, Heraklion, Crete, Greece
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10
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Valsecchi I, Lai JI, Stephen-Victor E, Pillé A, Beaussart A, Lo V, Pham CLL, Aimanianda V, Kwan AH, Duchateau M, Gianetto QG, Matondo M, Lehoux M, Sheppard DC, Dufrene YF, Bayry J, Guijarro JI, Sunde M, Latgé JP. Assembly and disassembly of Aspergillus fumigatus conidial rodlets. ACTA ACUST UNITED AC 2019; 5:100023. [PMID: 32743139 PMCID: PMC7389560 DOI: 10.1016/j.tcsw.2019.100023] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 02/22/2019] [Accepted: 02/23/2019] [Indexed: 11/27/2022]
Abstract
The rodlet structure present on the Aspergillus fumigatus conidial surface hides conidia from immune recognition. In spite of the essential biological role of the rodlets, the molecular basis for their self-assembly and disaggregation is not known. Analysis of the soluble forms of conidia-extracted and recombinant RodA by NMR spectroscopy has indicated the importance of disulfide bonds and identified two dynamic regions as likely candidates for conformational change and intermolecular interactions during conversion of RodA into the amyloid rodlet structure. Point mutations introduced into the RODA sequence confirmed that (1) mutation of a single cysteine was sufficient to block rodlet formation on the conidial surface and (2) both presumed amyloidogenic regions were needed for proper rodlet assembly. Mutations in the two putative amyloidogenic regions retarded and disturbed, but did not completely inhibit, the formation of the rodlets in vitro and on the conidial surface. Even in a disturbed form, the presence of rodlets on the surface of the conidia was sufficient to immunosilence the conidium. However, in contrast to the parental conidia, long exposure of mutant conidia lacking disulfide bridges within RodA or expressing RodA carrying the double (I115S/I146G) mutation activated dendritic cells with the subsequent secretion of proinflammatory cytokines. The immune reactivity of the RodA mutant conidia was not due to a modification in the RodA structure, but to the exposure of different pathogen-associated molecular patterns on the surface as a result of the modification of the rodlet surface layer. The full degradation of the rodlet layer, which occurs during early germination, is due to a complex array of cell wall bound proteases. As reported earlier, this loss of the rodlet layer lead to a strong anti-fumigatus host immune response in mouse lungs.
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Affiliation(s)
- Isabel Valsecchi
- Unité des Aspergillus, Institut Pasteur, Paris, France.,Biological NMR Technological Platform, Institut Pasteur, CNRS UMR 3528, Paris, France
| | - Jennifer I Lai
- School of Medical Sciences and Sydney Nano, The University of Sydney, NSW 2006, Australia
| | - Emmanuel Stephen-Victor
- Institut National de la Santé et de la Recherche Médicale, Centre de Recherche des Cordeliers, Sorbonne Université, Paris, France
| | - Ariane Pillé
- Biological NMR Technological Platform, Institut Pasteur, CNRS UMR 3528, Paris, France
| | - Audrey Beaussart
- Institute of Life Sciences, Université Catholique de Louvain, Croix du Sud, 4-5, bte L7.07.06, B-1348 Louvain-la-Neuve, Belgium.,Walloon Excellence in Life Sciences and Biotechnology, Belgium
| | - Victor Lo
- School of Medical Sciences and Sydney Nano, The University of Sydney, NSW 2006, Australia
| | - Chi L L Pham
- School of Medical Sciences and Sydney Nano, The University of Sydney, NSW 2006, Australia
| | | | - Ann H Kwan
- School of Life and Environmental Sciences and Sydney Nano, The University of Sydney, NSW 2006, Australia
| | - Magalie Duchateau
- Pasteur Proteomics Platform, Mass Spectrometry for Biology Unit, Institut Pasteur, CNRS USR 2000, Paris, France
| | - Quentin Giai Gianetto
- Pasteur Proteomics Platform, Mass Spectrometry for Biology Unit, Institut Pasteur, CNRS USR 2000, Paris, France.,Bioinformatics and Biostatistics Hub, C3BI, CNRS USR 3756, Institut Pasteur, Paris, France
| | - Mariette Matondo
- Pasteur Proteomics Platform, Mass Spectrometry for Biology Unit, Institut Pasteur, CNRS USR 2000, Paris, France
| | - Melanie Lehoux
- Departments of Medicine, Microbiology and Immunology, McGill University, Montréal, QC, Canada
| | - Donald C Sheppard
- Departments of Medicine, Microbiology and Immunology, McGill University, Montréal, QC, Canada
| | - Yves F Dufrene
- Institute of Life Sciences, Université Catholique de Louvain, Croix du Sud, 4-5, bte L7.07.06, B-1348 Louvain-la-Neuve, Belgium.,Walloon Excellence in Life Sciences and Biotechnology, Belgium
| | - Jagadeesh Bayry
- Institut National de la Santé et de la Recherche Médicale, Centre de Recherche des Cordeliers, Sorbonne Université, Paris, France
| | - J Iñaki Guijarro
- Biological NMR Technological Platform, Institut Pasteur, CNRS UMR 3528, Paris, France
| | - Margaret Sunde
- School of Medical Sciences and Sydney Nano, The University of Sydney, NSW 2006, Australia
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11
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Abstract
The balance between reactive oxygen species and reactive nitrogen species production by the host and stress response by fungi is a key axis of the host-pathogen interaction. This review will describe emerging themes in fungal pathogenesis underpinning this axis.
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Affiliation(s)
- Adilia Warris
- Medical Research Centre for Medical Mycology, Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, UK
| | - Elizabeth R Ballou
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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12
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Staerck C, Gastebois A, Vandeputte P, Calenda A, Larcher G, Gillmann L, Papon N, Bouchara JP, Fleury MJ. Microbial antioxidant defense enzymes. Microb Pathog 2017. [DOI: 10.1016/j.micpath.2017.06.015] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Mina S, Staerck C, Marot A, Godon C, Calenda A, Bouchara JP, Fleury MJJ. Scedosporium boydii CatA1 and SODC recombinant proteins, new tools for serodiagnosis of Scedosporium infection of patients with cystic fibrosis. Diagn Microbiol Infect Dis 2017; 89:282-287. [PMID: 28974395 DOI: 10.1016/j.diagmicrobio.2017.08.013] [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] [Received: 06/04/2017] [Revised: 08/18/2017] [Accepted: 08/21/2017] [Indexed: 01/24/2023]
Abstract
Scedosporium species rank the second among the filamentous fungi colonizing the airways of patients with cystic fibrosis (CF), after Aspergillus fumigatus. In CF, these fungi may cause various respiratory infections similar to those caused by A. fumigatus, including bronchitis and allergic broncho-pulmonary mycoses. Diagnosis of these infections relies on the detection of serum antibodies using crude antigenic extracts. However, many components of these extracts are common to Scedosporium and Aspergillus species, leading to cross-reactions. Here, 5 recombinant proteins from S. apiospermum or S. boydii were produced, and their value in serodiagnosis of Scedosporium infections was investigated by enzyme-linked immunosorbent assay. Two of them, corresponding to the Scedosporium catalase A1 or cytosolic Cu,Zn-superoxyde dismutase, allowed the detection of Scedosporium infection, and the differentiation with an Aspergillus infection. These recombinant proteins therefore may serve as a basis for the development of a standardized serological test.
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Affiliation(s)
- Sara Mina
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France; Beirut Arab University, Faculty of Health Sciences, Beirut, Lebanon
| | - Cindy Staerck
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
| | - Agnès Marot
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
| | - Charlotte Godon
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
| | - Alphonse Calenda
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
| | - Jean-Philippe Bouchara
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France; Laboratoire de Parasitologie-Mycologie, Centre Hospitalier Universitaire, Angers, France
| | - Maxime J J Fleury
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France.
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14
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Enzymatic Mechanisms Involved in Evasion of Fungi to the Oxidative Stress: Focus on Scedosporium apiospermum. Mycopathologia 2017. [DOI: 10.1007/s11046-017-0160-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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15
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Proteomics as a Tool to Identify New Targets Against Aspergillus and Scedosporium in the Context of Cystic Fibrosis. Mycopathologia 2017; 183:273-289. [PMID: 28484941 DOI: 10.1007/s11046-017-0139-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 04/25/2017] [Indexed: 12/26/2022]
Abstract
Cystic fibrosis (CF) is a genetic disorder that increases the risk of suffering microbial, including fungal, infections. In this paper, proteomics-based information was collated relating to secreted and cell wall proteins with potential medical applications from the most common filamentous fungi in CF, i.e., Aspergillus and Scedosporium/Lomentospora species. Among the Aspergillus fumigatus secreted allergens, β-1,3-endoglucanase, the alkaline protease 1 (Alp1/oryzin), Asp f 2, Asp f 13/15, chitinase, chitosanase, dipeptidyl-peptidase V (DppV), the metalloprotease Asp f 5, mitogillin/Asp f 1, and thioredoxin reductase receive a special mention. In addition, the antigens β-glucosidase 1, catalase, glucan endo-1,3-β-glucosidase EglC, β-1,3-glucanosyltransferases Gel1 and Gel2, and glutaminase A were also identified in secretomes of other Aspergillus species associated with CF: Aspergillus flavus, Aspergillus niger, Aspergillus nidulans, and Aspergillus terreus. Regarding cell wall proteins, cytochrome P450 and eEF-3 were proposed as diagnostic targets, and alkaline protease 2 (Alp2), Asp f 3 (putative peroxiredoxin pmp20), probable glycosidases Asp f 9/Crf1 and Crf2, GPI-anchored protein Ecm33, β-1,3-glucanosyltransferase Gel4, conidial hydrophobin Hyp1/RodA, and secreted aspartyl protease Pep2 as protective vaccines in A. fumigatus. On the other hand, for Scedosporium/Lomentospora species, the heat shock protein Hsp70 stands out as a relevant secreted and cell wall antigen. Additionally, the secreted aspartyl proteinase and an ortholog of Asp f 13, as well as the cell wall endo-1,3-β-D-glucosidase and 1,3-β-glucanosyl transferase, were also found to be significant proteins. In conclusion, proteins mentioned in this review may be promising candidates for developing innovative diagnostic and therapeutic tools for fungal infections in CF patients.
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16
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Richardson MD, Page ID. Aspergillus serology: Have we arrived yet? Med Mycol 2016; 55:48-55. [PMID: 27816904 DOI: 10.1093/mmy/myw116] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 08/07/2016] [Accepted: 10/12/2016] [Indexed: 12/11/2022] Open
Abstract
Aspergillosis presents in various clinical forms, among them chronic pulmonary aspergillosis, which is a spectrum of disease entities including aspergilloma, chronic cavitary pulmonary aspergillosis, and chronic fibrosing pulmonary aspergillosis. Aspergillus also contributes to fungal allergy and sensitization. Analysis of the immune response to Aspergillus and its antigens is an integral part of the diagnosis of these diseases. Over the past half century, the techniques used to determine antibody titers have evolved from testing for precipitating and agglutinating antibodies by agar gel double diffusion and immunolectrophoresis to enzyme-linked immunosorbent assays using recombinant proteins as capture antigens. A resurgence of interest in the detection of immunoglobulins, primarily Aspergillus-specific IgG, has hinted at the possibility of distinguishing between colonization and invasion in immunocompromised patients with invasive aspergillosis. Even though there appears to be a greater degree of discrimination between the clinical forms of aspergillosis there is still a long way to travel. This review presents illustrative examples of where new diagnostic platforms and technologies have been applied to this intriguing spectrum of diseases.
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Affiliation(s)
- Malcolm D Richardson
- Mycology Reference Centre Manchester, University Hospital of South Manchester, Manchester, UK .,National Aspergillosis Center, University Hospital of South Manchester.,Division of Infection, Immunity and Respiratory Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, UK
| | - Iain D Page
- National Aspergillosis Center, University Hospital of South Manchester.,Division of Infection, Immunity and Respiratory Medicine, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, UK
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17
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Kniemeyer O, Ebel F, Krüger T, Bacher P, Scheffold A, Luo T, Strassburger M, Brakhage AA. Immunoproteomics of Aspergillus for the development of biomarkers and immunotherapies. Proteomics Clin Appl 2016; 10:910-921. [PMID: 27312145 DOI: 10.1002/prca.201600053] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/18/2016] [Accepted: 06/13/2016] [Indexed: 12/11/2022]
Abstract
Filamentous fungi of the genus Aspergillus play significant roles as pathogens causing superficial and invasive infections as well as allergic reactions in humans. Particularly invasive mycoses caused by Aspergillus species are characterized by high mortality rates due to difficult diagnosis and insufficient antifungal therapy. The application of immunoproteomic approaches has a great potential to identify new targets for the diagnosis, therapy, and vaccine development of diseases caused by Aspergillus species. Serological proteome analyses (SERPA) that combine 2D electrophoresis with Western blotting are still one of the most popular techniques for the identification of antigenic proteins. However, recently a growing number of approaches have been developed to identify proteins, which either provoke an antibody response or which represent targets of T-cell immunity in patients with allergy or fungal infections. Here, we review advances in the studies of immune responses against pathogenic Aspergilli as well as the current status of diagnosis and immunotherapy of Aspergillus infections.
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Affiliation(s)
- Olaf Kniemeyer
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Frank Ebel
- Institute for Infectious Diseases and Zoonoses, LMU, Munich, Germany
| | - Thomas Krüger
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Petra Bacher
- Department of Cellular Immunology, Clinic for Rheumatology and Clinical Immunology, Charité, University Medicine Berlin, Berlin, Germany
| | - Alexander Scheffold
- Department of Cellular Immunology, Clinic for Rheumatology and Clinical Immunology, Charité, University Medicine Berlin, Berlin, Germany.,German Rheumatism Research Centre (DRFZ) Berlin, Leibniz Association, Berlin, Germany
| | - Ting Luo
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Maria Strassburger
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany.,Transfer Group Anti-Infectives, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Jena, Germany
| | - Axel A Brakhage
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute (HKI), Jena, Germany. .,Institute of Microbiology, Friedrich Schiller University, Jena, Germany.
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18
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Erdmann JH, Graf B, Blau I, Fischer F, Timm G, Hemmati P, Arnold R, Penack O. Anti-Aspergillusimmunoglobulin-G testing in serum of hematopoietic stem cell transplant recipients. Transpl Infect Dis 2016; 18:354-60. [DOI: 10.1111/tid.12529] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/02/2016] [Accepted: 01/20/2016] [Indexed: 11/28/2022]
Affiliation(s)
- J.-H. Erdmann
- Pharmacy; Charité University Medical School; Berlin Germany
| | - B. Graf
- Labor Berlin - Charité Vivantes GmbH; Berlin Germany
| | - I.W. Blau
- Department of Hematology, Oncology and Tumor immunology; Charité University Medical School; Berlin Germany
| | - F. Fischer
- Department of Hematology, Oncology and Tumor immunology; Charité University Medical School; Berlin Germany
| | - G. Timm
- Department of Hematology, Oncology and Tumor immunology; Charité University Medical School; Berlin Germany
| | - P. Hemmati
- Department of Hematology, Oncology and Tumor immunology; Charité University Medical School; Berlin Germany
| | - R. Arnold
- Department of Hematology, Oncology and Tumor immunology; Charité University Medical School; Berlin Germany
| | - O. Penack
- Department of Hematology, Oncology and Tumor immunology; Charité University Medical School; Berlin Germany
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19
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Teutschbein J, Simon S, Lother J, Springer J, Hortschansky P, Morton CO, Löffler J, Einsele H, Conneally E, Rogers TR, Guthke R, Brakhage AA, Kniemeyer O. Proteomic Profiling of Serological Responses to Aspergillus fumigatus Antigens in Patients with Invasive Aspergillosis. J Proteome Res 2016; 15:1580-91. [PMID: 26974881 DOI: 10.1021/acs.jproteome.6b00042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Aspergillus fumigatus is the species that most commonly causes the opportunistic infection invasive aspergillosis (IA) in patients being treated for hematological malignancies. Little is known about the A. fumigatus proteins that trigger the production of Aspergillus-specific IgG antibodies during the course of IA. To characterize the serological response to A. fumigatus protein antigens, mycelial proteins were separated by 2-D gel electrophoresis. The gels were immunoblotted with sera from patients with probable and proven IA and control patients without IA. We identified 49 different fungal proteins, which gave a positive IgG antibody signal. Most of these antigens play a role in primary metabolism and stress responses. Overall, our analysis identified 18 novel protein antigens from A. fumigatus. To determine whether these antigens can be used as diagnostic or prognostic markers or exhibit a protective activity, we employed supervised machine learning with decision trees. We identified two candidates for further analysis, the protein antigens CpcB and Shm2. Heterologously produced Shm2 induced a strongly proinflammatory response in human peripheral blood mononuclear cells after in vitro stimulation. In contrast, CpcB did not activate the immune response of PBMCs. These findings could serve as the basis for the development of an immunotherapy of IA.
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Affiliation(s)
- Janka Teutschbein
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute (HKI) , 07745 Jena, Germany.,Institute of Microbiology, Friedrich Schiller University , 07743 Jena, Germany
| | - Svenja Simon
- Research Group Systems Biology/Bioinformatics, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute (HKI) , 07745 Jena, Germany
| | - Jasmin Lother
- Medizinische Klinik und Poliklinik II, Universitätsklinikum Würzburg , 97080 Würzburg, Germany
| | - Jan Springer
- Medizinische Klinik und Poliklinik II, Universitätsklinikum Würzburg , 97080 Würzburg, Germany
| | - Peter Hortschansky
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute (HKI) , 07745 Jena, Germany.,Institute of Microbiology, Friedrich Schiller University , 07743 Jena, Germany
| | - C Oliver Morton
- Department of Clinical Microbiology, Trinity College Dublin , Dublin 2, Ireland
| | - Jürgen Löffler
- Medizinische Klinik und Poliklinik II, Universitätsklinikum Würzburg , 97080 Würzburg, Germany
| | - Hermann Einsele
- Medizinische Klinik und Poliklinik II, Universitätsklinikum Würzburg , 97080 Würzburg, Germany
| | | | - Thomas R Rogers
- Department of Clinical Microbiology, Trinity College Dublin , Dublin 2, Ireland.,Department of Haematology, St. James's Hospital , Dublin 8, Ireland
| | - Reinhard Guthke
- Research Group Systems Biology/Bioinformatics, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute (HKI) , 07745 Jena, Germany
| | - Axel A Brakhage
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute (HKI) , 07745 Jena, Germany.,Institute of Microbiology, Friedrich Schiller University , 07743 Jena, Germany
| | - Olaf Kniemeyer
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute (HKI) , 07745 Jena, Germany.,Institute of Microbiology, Friedrich Schiller University , 07743 Jena, Germany.,Integrated Research and Treatment Center, Center for Sepsis Control and Care Jena (CSCC), University Hospital , 07747 Jena, Germany
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20
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Prospective Evaluation of a New Aspergillus IgG Enzyme Immunoassay Kit for Diagnosis of Chronic and Allergic Pulmonary Aspergillosis. J Clin Microbiol 2016; 54:1236-42. [PMID: 26888904 DOI: 10.1128/jcm.03261-15] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 02/10/2016] [Indexed: 12/29/2022] Open
Abstract
Anti-Aspergillus IgG antibodies are important biomarkers for the diagnosis of chronic pulmonary aspergillosis (CPA) and allergic bronchopulmonary aspergillosis (ABPA). We compared the performance of a new commercial enzyme immunoassay (EIA) (Bordier Affinity Products) with that of the Bio-Rad and Virion\Serion EIAs. This assay is novel in its association of two recombinant antigens with somatic and metabolic antigens of Aspergillus fumigatus In a prospective multicenter study, 436 serum samples from 147 patients diagnosed with CPA (136 samples/104 patients) or ABPA (94 samples/43 patients) and from 205 controls (206 samples) were tested. We obtained sensitivities of 97%, 91.7%, and 86.1%, and specificities of 90.3%, 91.3%, and 81.5% for the Bordier, Bio-Rad, and Virion\Serion tests, respectively. The Bordier kit was more sensitive than the Bio-Rad kit (P < 0.01), which was itself more sensitive than the Virion\Serion kit (P = 0.04). The Bordier and Bio-Rad kits had similar specificity (P = 0.8), both higher than that of the Virion\Serion kit (P = 0.02). The area under the receiver operating characteristic (ROC) curves confirmed the superiority of the Bordier kit over the Bio-Rad and the Virion\Serion kits (0.977, 0.951, and 0.897, respectively; P < 0.01 for each comparison). In a subset analysis of 279 serum samples tested with the Bordier and Bio-Rad kits and an in-house immunoprecipitin assay (IPD), the Bordier kit had the highest sensitivity (97.7%), but the IPD tended to be more specific (71.2 and 84.7%, respectively; P = 0.10). The use of recombinant, somatic, and metabolic antigens in a single EIA improved the balance of sensitivity and specificity, resulting in an assay highly suitable for use in the diagnosis of chronic and allergic aspergillosis.
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21
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New Commercially Available IgG Kits and Time-Resolved Fluorometric IgE Assay for Diagnosis of Allergic Bronchopulmonary Aspergillosis in Patients with Cystic Fibrosis. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2015; 23:196-203. [PMID: 26698651 DOI: 10.1128/cvi.00498-15] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 12/08/2015] [Indexed: 12/14/2022]
Abstract
Allergic bronchopulmonary aspergillosis (ABPA) is difficult to diagnose; diagnosis relies on clinical, radiological, pathological, and serological criteria. Our aim was to assess the performance of two new commercially available kits and a new in-house assay: an Aspergillus fumigatus enzyme-linked immunosorbent assay (ELISA) IgG kit (Bordier Affinity Products), an Aspergillus Western blotting IgG kit (LDBio Diagnostics), and a new in-house time-resolved fluorometric IgE assay (dissociation-enhanced lanthanide fluorescent immunoassay, or DELFIA) using recombinant proteins from an Aspergillus sp. recently developed by our laboratory for ABPA diagnosis in a retrospective study that included 26 cystic fibrosis patients. Aspergillus fumigatus-specific IgG levels measured by a commercial ELISA kit were in accordance with the level of precipitins currently used in our lab. The ELISA kit could accelerate and help standardize ABPA diagnosis. Aspergillus fumigatus-specific IgE levels measured by ImmunoCAP (Phadia) with A. fumigatus M3 antigen and by DELFIA with a purified protein extract of A. fumigatus were significantly correlated (P < 10(-6)). The results with recombinant antigens glucose-6-phosphate isomerase and mannitol-1-phosphate dehydrogenase were encouraging but must be confirmed with sera from more patients. The DELFIA is an effective tool that can detect specific IgE against more fungal allergens than can be detected with other commercially available tests.
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22
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Eugster PJ, Grouzmann E, Salamin K, Monod M. Production and characterization of two major Aspergillus oryzae secreted prolyl endopeptidases able to efficiently digest proline-rich peptides of gliadin. Microbiology (Reading) 2015; 161:2277-88. [DOI: 10.1099/mic.0.000198] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Mina S, Staerck C, d'Almeida SM, Marot A, Delneste Y, Calenda A, Tabiasco J, Bouchara JP, Fleury MJJ. Identification of Scedosporium boydii catalase A1 gene, a reactive oxygen species detoxification factor highly expressed in response to oxidative stress and phagocytic cells. Fungal Biol 2015; 119:1322-1333. [PMID: 26615753 DOI: 10.1016/j.funbio.2015.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 09/10/2015] [Accepted: 09/24/2015] [Indexed: 01/27/2023]
Abstract
Scedosporium boydii is an opportunistic filamentous fungus which may be responsible for a large variety of infections in both immunocompetent and immunocompromised individuals. This fungus belongs to the Scedosporium apiospermum species complex which usually ranks second among the filamentous fungi colonizing the airways of patients with cystic fibrosis (CF). Species of the S. apiospermum complex are able to chronically colonize the CF airways suggesting pathogenic mechanisms allowing persistence and growth of these fungi in the respiratory tract. Few putative virulence factors have been purified and characterized so far in the S. apiospermum complex including a cytosolic Cu,Zn-superoxide dismutase (SOD) and a monofunctional catalase (catalase A1). Upon microbial infection, host phagocytes release reactive oxygen species (ROS), such as hydrogen peroxide, as part of the antimicrobial response. Catalases are known to protect pathogens against ROS by degradation of the hydrogen peroxide. Here, we identified the S. boydii catalase A1 gene (CATA1) and investigated its expression in response to the environmental conditions encountered in the CF airways and to the oxidative stress. Results showed that S. boydii CATA1 gene expression is not affected by hypoxia, hypercapnia or pH changes. In contrast, CATA1 gene was overexpressed in response to a chemically induced oxidative stress with a relative gene expression 37-fold higher in the presence of 250 μM H(2)O(2), 20-fold higher with 250 μM menadione and 5-fold higher with 2 mM paraquat. Moreover, S. boydii CATA1 gene expression progressively increased upon exposure to activated THP-1-derived macrophages, reaching a maximum after 12 h (26 fold). Activated HL60-derived neutrophils and activated human peripheral blood neutrophils more rapidly induced S. boydii CATA1 gene overexpression, a maximum gene expression level being reached at 75 min (17 fold) and 60 min (15 fold), respectively. In contrast expression of the gene encoding the Cu,Zn-SOD (SODC gene) was not affected by H(2)O(2), menadione, paraquat or in co-culture with phagocytic cells. These results suggest that S. boydii CATA1 gene is highly stimulated by the oxidative burst response whereas SODC gene is constitutively expressed.
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Affiliation(s)
- Sara Mina
- L'UNAM Université, Université d'Angers, Groupe d'Etude des Interactions Hôte-Pathogène, UPRES EA 3142, Angers, France
| | - Cindy Staerck
- L'UNAM Université, Université d'Angers, Groupe d'Etude des Interactions Hôte-Pathogène, UPRES EA 3142, Angers, France
| | - Sènan M d'Almeida
- L'UNAM Université, Université d'Angers, Immunité Innée et Immunothérapie, Angers, France; Inserm UMR 892, Angers, France; CNRS UMR 6299, Angers, France
| | - Agnès Marot
- L'UNAM Université, Université d'Angers, Groupe d'Etude des Interactions Hôte-Pathogène, UPRES EA 3142, Angers, France
| | - Yves Delneste
- L'UNAM Université, Université d'Angers, Immunité Innée et Immunothérapie, Angers, France; Inserm UMR 892, Angers, France; CNRS UMR 6299, Angers, France; Laboratoire d'Immunologie et Allergologie, Centre Hospitalier Universitaire d'Angers, France
| | - Alphonse Calenda
- L'UNAM Université, Université d'Angers, Groupe d'Etude des Interactions Hôte-Pathogène, UPRES EA 3142, Angers, France
| | - Julie Tabiasco
- L'UNAM Université, Université d'Angers, Immunité Innée et Immunothérapie, Angers, France; Inserm UMR 892, Angers, France; CNRS UMR 6299, Angers, France
| | - Jean-Philippe Bouchara
- L'UNAM Université, Université d'Angers, Groupe d'Etude des Interactions Hôte-Pathogène, UPRES EA 3142, Angers, France; Laboratoire de Parasitologie-Mycologie, Centre Hospitalier Universitaire d'Angers, France
| | - Maxime J J Fleury
- L'UNAM Université, Université d'Angers, Groupe d'Etude des Interactions Hôte-Pathogène, UPRES EA 3142, Angers, France.
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Page ID, Richardson M, Denning DW. Antibody testing in aspergillosis--quo vadis? Med Mycol 2015; 53:417-39. [PMID: 25980000 DOI: 10.1093/mmy/myv020] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 02/09/2015] [Indexed: 12/19/2022] Open
Abstract
Humans are constantly exposed to airborne Aspergillus spores. Most develop Aspergillus-specific antibodies by adulthood. Persons with chronic lung disease or Aspergillus airway colonization often have raised levels of Aspergillus-specific immunoglobululin G (IgG). It is not known whether this signifies an increased risk of future aspergillosis.Chronic and allergic forms of pulmonary aspergillosis are estimated to affect over three million people worldwide. Antibody testing is central to diagnosis of these conditions, with raised Aspergillus-specific IgG in chronic pulmonary aspergillosis and raised Aspergillus-specific IgE in allergic aspergillosis. Antibody levels are also used to monitor treatment response in these syndromes. Acute invasive disease is less common. There is a more limited role for antibody testing in this setting as immunosuppression often results in delayed or absent antibody response.Many methods exist to detect Aspergillus-specific antibodies, but there are limited published data regarding comparative efficacy and reproducibility. We discuss the comparative merits of the available tests in the various clinical settings and their suitability for use in the resource-poor settings where the majority of cases of aspergillosis are thought to occur. We summarize the gaps in existing knowledge and opportunities for further study that could allow optimal use of antibody testing in this field.
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Affiliation(s)
- Iain D Page
- Institute of Inflammation and Repair, The University of Manchester, UK Manchester Academic Health Science Centre, UK National Aspergillosis Center and Mycology Reference Centre, University Hospital South Manchester, UK
| | - Malcolm Richardson
- Institute of Inflammation and Repair, The University of Manchester, UK Manchester Academic Health Science Centre, UK National Aspergillosis Center and Mycology Reference Centre, University Hospital South Manchester, UK
| | - David W Denning
- Institute of Inflammation and Repair, The University of Manchester, UK Manchester Academic Health Science Centre, UK National Aspergillosis Center and Mycology Reference Centre, University Hospital South Manchester, UK
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Komarova BS, Orekhova MV, Tsvetkov YE, Beau R, Aimanianda V, Latgé JP, Nifantiev NE. Synthesis of a pentasaccharide and neoglycoconjugates related to fungal α-(1→3)-glucan and their use in the generation of antibodies to trace Aspergillus fumigatus cell wall. Chemistry 2014; 21:1029-35. [PMID: 25376936 DOI: 10.1002/chem.201404770] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Indexed: 11/08/2022]
Abstract
3-Aminopropyl α-(1→3)-pentaglucoside, a fragment of α-(1→3)-glucan of the cell wall of Aspergillus fumigatus, has been synthesized in a blockwise approach. The application of mono- and disaccharide N-phenyltrifluoroacetimidates bearing a stereodirecting 6-O-benzoyl group was essential for stereoselective α-glucosylations. In the products, p-methoxyphenyl and levulinoyl groups served as orthogonal protecting groups for the anomeric position and 3-OH group, respectively. Their removal from shared blocks led to donors and acceptors that were used for the synthesis of pentasaccharides. Coupling of free α-(1→3)-pentaglucoside with biotin and bovine serum albumin (BSA) gave glycoconjugate tools for mycological studies. Immunization of mice with the BSA conjugate induced the generation of antibodies that recognize α-(1→3)-glucan on A. fumigatus cell wall and distinguish its morphotypes. This discovery represents a first step to the development of a diagnostic test system and a vaccine to detect and fight this life-threatening pathogen.
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Affiliation(s)
- Bozhena S Komarova
- Laboratory of Glycoconjugate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991 Moscow (Russia)
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Purification and characterization of a mycelial catalase from Scedosporium boydii, a useful tool for specific antibody detection in patients with cystic fibrosis. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2014; 22:37-45. [PMID: 25355796 DOI: 10.1128/cvi.00482-14] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Scedosporium boydii is an opportunistic filamentous fungus which may be responsible for a wide variety of infections in immunocompetent and immunocompromised individuals. This fungus belongs to the Scedosporium apiospermum species complex, which usually ranks second among the filamentous fungi colonizing the airways of patients with cystic fibrosis (CF) and may lead to allergic bronchopulmonary mycoses, sensitization, or respiratory infections. Upon microbial infection, host phagocytic cells release reactive oxygen species (ROS), such as hydrogen peroxide, as part of the antimicrobial response. Catalases are known to protect pathogens against ROS by detoxification of the hydrogen peroxide. Here, we investigated the catalase equipment of Scedosporium boydii, one of the major pathogenic species in the S. apiospermum species complex. Three catalases were identified, and the mycelial catalase A1 was purified to homogeneity by a three-step chromatographic process. This enzyme is a monofunctional tetrameric protein of 460 kDa, consisting of four 82-kDa glycosylated subunits. The potential usefulness of this enzyme in serodiagnosis of S. apiospermum infections was then investigated by an enzyme-linked immunosorbent assay (ELISA), using 64 serum samples from CF patients. Whatever the species involved in the S. apiospermum complex, sera from infected patients were clearly differentiated from sera from patients with an Aspergillus fumigatus infection or those from CF patients without clinical and biological signs of a fungal infection and without any fungus recovered from sputum samples. These results suggest that catalase A1 is a good candidate for the development of an immunoassay for serodiagnosis of infections caused by the S. apiospermum complex in patients with CF.
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Bacher P, Kniemeyer O, Teutschbein J, Thön M, Vödisch M, Wartenberg D, Scharf DH, Koester-Eiserfunke N, Schütte M, Dübel S, Assenmacher M, Brakhage AA, Scheffold A. Identification of Immunogenic Antigens fromAspergillus fumigatusby Direct Multiparameter Characterization of Specific Conventional and Regulatory CD4+T Cells. THE JOURNAL OF IMMUNOLOGY 2014; 193:3332-43. [DOI: 10.4049/jimmunol.1400776] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Beck J, Broniszewska M, Schwienbacher M, Ebel F. Characterization of the Aspergillus fumigatus chitosanase CsnB and evaluation of its potential use in serological diagnostics. Int J Med Microbiol 2014; 304:696-702. [DOI: 10.1016/j.ijmm.2014.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 04/30/2014] [Accepted: 05/03/2014] [Indexed: 10/25/2022] Open
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Lamoth F, Alexander BD. Nonmolecular methods for the diagnosis of respiratory fungal infections. Clin Lab Med 2014; 34:315-36. [PMID: 24856530 DOI: 10.1016/j.cll.2014.02.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Diagnosis of invasive fungal pneumonias by conventional culture methods is difficult to assess and often delayed. Nonmolecular fungal markers have emerged as an important adjunctive tool to support their diagnosis in combination with other clinical, radiologic, and microbiological criteria of invasive fungal diseases. Concerns about the sensitivity and specificity of some tests in different patient populations should lead to warnings about their widespread use. None can identify the emerging and particularly deadly fungal pathogens responsible for mucormycosis. The role of nonmolecular fungal markers should be better defined in combination with other microbiological and radiologic tools in preemptive antifungal strategies.
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Affiliation(s)
- Frédéric Lamoth
- Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Box 102359, Durham, NC 27710, USA; Clinical Microbiology Laboratory, Department of Pathology, Duke University Medical Center, 108 Carl building, Durham, NC 27710, USA; Infectious Diseases Service and Institute of Microbiology, Lausanne University Hospital, Rue du Bugnon 46, 1011 Lausanne, Switzerland.
| | - Barbara D Alexander
- Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Box 102359, Durham, NC 27710, USA; Clinical Microbiology Laboratory, Department of Pathology, Duke University Medical Center, 108 Carl building, Durham, NC 27710, USA.
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Fernández D, Russi S, Vendrell J, Monod M, Pallarès I. A functional and structural study of the major metalloprotease secreted by the pathogenic fungusAspergillus fumigatus. ACTA CRYSTALLOGRAPHICA SECTION D: BIOLOGICAL CRYSTALLOGRAPHY 2013; 69:1946-57. [DOI: 10.1107/s0907444913017642] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 06/26/2013] [Indexed: 01/09/2023]
Abstract
Fungalysins are secreted fungal peptidases with the ability to degrade the extracellular matrix proteins elastin and collagen and are thought to act as virulence factors in diseases caused by fungi. Fungalysins constitute a unique family among zinc-dependent peptidases that bears low sequence similarity to known bacterial peptidases of the thermolysin family. The crystal structure of the archetype of the fungalysin family,Aspergillus fumigatusmetalloprotease (AfuMep), has been obtained for the first time. The 1.8 Å resolution structure of AfuMep corresponds to that of an autoproteolyzed proenzyme with separate polypeptide chains corresponding to the N-terminal prodomain in a binary complex with the C-terminal zinc-bound catalytic domain. The prodomain consists of a tandem of cystatin-like folds whose C-terminal end is buried into the active-site cleft of the catalytic domain. The catalytic domain harbouring the key catalytic zinc ion and its ligands, two histidines and one glutamic acid, undergoes a conspicuous rearrangement of its N-terminal end during maturation. One key positively charged amino-acid residue and the C-terminal disulfide bridge appear to contribute to its structural–functional properties. Thus, structural, biophysical and biochemical analysis were combined to provide a deeper comprehension of the underlying properties ofA. fumigatusfungalysin, serving as a framework for the as yet poorly known metallopeptidases from pathogenic fungi.
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Potenza L, Vallerini D, Barozzi P, Riva G, Forghieri F, Beauvais A, Beau R, Candoni A, Maertens J, Rossi G, Morselli M, Zanetti E, Quadrelli C, Codeluppi M, Guaraldi G, Pagano L, Caira M, Giovane CD, Maccaferri M, Stefani A, Morandi U, Tazzioli G, Girardis M, Delia M, Specchia G, Longo G, Marasca R, Narni F, Merli F, Imovilli A, Apolone G, Carvalho A, Comoli P, Romani L, Latgè JP, Luppi M. Characterization of specific immune responses to different Aspergillus antigens during the course of invasive Aspergillosis in hematologic patients. PLoS One 2013; 8:e74326. [PMID: 24023936 PMCID: PMC3762751 DOI: 10.1371/journal.pone.0074326] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Accepted: 07/31/2013] [Indexed: 01/26/2023] Open
Abstract
Several studies in mouse model of invasive aspergillosis (IA) and in healthy donors have shown that different Aspergillus antigens may stimulate different adaptive immune responses. However, the occurrence of Aspergillus-specific T cells have not yet been reported in patients with the disease. In patients with IA, we have investigated during the infection: a) whether and how specific T-cell responses to different Aspergillus antigens occur and develop; b) which antigens elicit the highest frequencies of protective immune responses and, c) whether such protective T cells could be expanded ex-vivo. Forty hematologic patients have been studied, including 22 patients with IA and 18 controls. Specific T cells producing IL-10, IFN-γ, IL-4 and IL-17A have been characterized through enzyme linked immunospot and cytokine secretion assays on 88 peripheral blood (PB) samples, by using the following recombinant antigens: GEL1p, CRF1p, PEP1p, SOD1p, α1–3glucan, β1–3glucan, galactomannan. Specific T cells were expanded through short term culture. Aspergillus-specific T cells producing non-protective interleukin-10 (IL-10) and protective interferon-gamma (IFN-γ) have been detected to all the antigens only in IA patients. Lower numbers of specific T cells producing IL-4 and IL-17A have also been shown. Protective T cells targeted predominantly Aspergillus cell wall antigens, tended to increase during the IA course and to be associated with a better clinical outcome. Aspergillus-specific T cells could be successfully generated from the PB of 8 out of 8 patients with IA and included cytotoxic subsets able to lyse Aspergillus hyphae. Aspergillus specific T-cell responses contribute to the clearance of the pathogen in immunosuppressed patients with IA and Aspergillus cell wall antigens are those mainly targeted by protective immune responses. Cytotoxic specific T cells can be expanded from immunosuppressed patients even during the infection by using the above mentioned antigens. These findings may be exploited for immunotherapeutic purposes in patients with IA.
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Affiliation(s)
- Leonardo Potenza
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Daniela Vallerini
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Patrizia Barozzi
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Giovanni Riva
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Fabio Forghieri
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Anne Beauvais
- Unitè des Aspergillus, Pasteur Institut, Paris, France
| | - Remi Beau
- Unitè des Aspergillus, Pasteur Institut, Paris, France
| | - Anna Candoni
- Hematology and Bone Marrow Transplantation, Udine, Italy
| | - Johan Maertens
- Department of Hematology, Universitaire Ziekenhuizen Leuven, Campus Gasthuisberg, Leuven, Belgium
| | - Giulio Rossi
- Section of Histopathology, IRCCS/Arcispedale S.Maria Nuova Reggio, Emilia, Italy
| | - Monica Morselli
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Eleonora Zanetti
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Chiara Quadrelli
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Mauro Codeluppi
- Infectious Diseases Clinics, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Giovanni Guaraldi
- Infectious Diseases Clinics, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Livio Pagano
- Department of Hematology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Morena Caira
- Department of Hematology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Cinzia Del Giovane
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Monica Maccaferri
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Alessandro Stefani
- Division of Thoracic Surgery, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Uliano Morandi
- Division of Thoracic Surgery, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Giovanni Tazzioli
- Division of General Surgery, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Massimo Girardis
- Division of Anaesthesiology and Intensive Care, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Mario Delia
- Hematology Department, DAP, University of Bari, Bari, Italy
| | | | - Giuseppe Longo
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Roberto Marasca
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Franco Narni
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
| | - Francesco Merli
- Division of Hematology, IRCCS/Arcispedale S.Maria Nuova Reggio, Emilia, Italy
| | - Annalisa Imovilli
- Division of Hematology, IRCCS/Arcispedale S.Maria Nuova Reggio, Emilia, Italy
| | - Giovanni Apolone
- Division of Hematology, IRCCS/Arcispedale S.Maria Nuova Reggio, Emilia, Italy
| | - Agostinho Carvalho
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | - Patrizia Comoli
- Pediatric Hematology/Oncology and Transplantation, IRCCS S. Matteo Hospital, Pavia, Italy
| | - Luigina Romani
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia, Italy
| | | | - Mario Luppi
- Section of Hematology, Department of Surgical and Medical Sciences, University of Modena and Reggio Emilia, Azienda Ospedaliera Policlinico, Modena, Italy
- * E-mail:
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Buchheidt D, Spiess B, Hofmann WK, Reinwald M. Galactomannan-Based and PCR-Based Assays in Bronchoalveolar Lavage to Diagnose Invasive Aspergillosis: Current Status and Future Prospects. CURRENT FUNGAL INFECTION REPORTS 2013. [DOI: 10.1007/s12281-013-0141-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Development of an enzyme-linked immunosorbent assay for serodiagnosis of ringworm infection in cattle. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2013; 20:1150-4. [PMID: 23740921 DOI: 10.1128/cvi.00243-13] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aim of this study was to develop an in-house enzyme-linked immunosorbent assay (ELISA) for the serological diagnosis of ringworm infection in cattle. We used available recombinant forms of Trichophyton rubrum dipeptidyl peptidase V (TruDppV) and T. rubrum leucin aminopeptidase 2 (TruLap2), which are 98% identical to Trichophyton verrucosum orthologues. Field serum samples from 135 cattle with ringworm infection, as confirmed by direct microscopy, fluorescence microscopy, and PCR, and from 55 cattle without any apparent skin lesions or history of ringworm infection that served as negative controls were used. Sensitivities, specificities, and positive and negative predictive values were determined to evaluate the diagnostic value of our ELISA. Overall, the ELISAs based on recombinant TruDppV and TruLap2 discriminated well between infected animals and healthy controls. Highly significant differences (P < 0.0001, Mann-Whitney U test) were noted between optical density values obtained when sera from infected versus control cattle were tested. The ELISA developed for the detection of specific antibodies against DppV gave 89.6% sensitivity, 92.7% specificity, a 96.8% positive predictive value, and a 78.4% negative predictive value. The recombinant TruLap2-based ELISA displayed 88.1% sensitivity, 90.9% specificity, a 95.9% positive predictive value, and a 75.7% negative predictive value. To the best of our knowledge, this is the first ELISA based on recombinant antigens for assessing immune responses to ringworm infection in cattle; it is particularly suitable for epidemiological studies and also for the evaluation of vaccines and/or vaccination procedures.
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Circulating human basophils lack the features of professional antigen presenting cells. Sci Rep 2013; 3:1188. [PMID: 23378919 PMCID: PMC3561623 DOI: 10.1038/srep01188] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 01/10/2013] [Indexed: 11/11/2022] Open
Abstract
Recent reports in mice demonstrate that basophils function as antigen presenting cells (APC). They express MHC class II and co-stimulatory molecules CD80 and CD86, capture and present soluble antigens or IgE-antigen complexes and polarize Th2 responses. Therefore, we explored whether human circulating basophils possess the features of professional APC. We found that unlike dendritic cells (DC) and monocytes, steady-state circulating human basophils did not express HLA-DR and co-stimulatory molecules CD80 and CD86. Basophils remained negative for these molecules following stimulation with soluble Asp f 1, one of the allergens of Aspergillus fumigatus; Bet v 1, the major birch allergen; TLR2-ligand or even upon IgE cross-linking. Unlike DC, Asp f 1-pulsed basophils did not promote Th2 responses as analyzed by the secretion of IL-4 in the basophil-CD4+ T cell co-culture. Together, these results demonstrate the inability of circulating human basophils to function as professional APC.
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Verweij PE, Kema GHJ, Zwaan B, Melchers WJG. Triazole fungicides and the selection of resistance to medical triazoles in the opportunistic mould Aspergillus fumigatus. PEST MANAGEMENT SCIENCE 2013; 69:165-70. [PMID: 23109245 DOI: 10.1002/ps.3390] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 06/29/2012] [Accepted: 07/17/2012] [Indexed: 05/26/2023]
Abstract
Azole resistance is an emerging problem in the opportunistic mould Aspergillus fumigatus. The triazoles are the most important agents for the management of Aspergillus diseases in humans. Selection for acquired resistance may occur in the hospital setting through exposure to high doses of azoles during azole therapy, but evidence is accumulating that A. fumigatus may become resistant to medical triazoles through environmental exposure to fungicides. The recovery of A. fumigatus isolates resistant to the medical triazoles from azole-naive patients as well as from the environment strongly indicates an environmental route of resistance selection. Molecule alignment studies have identified five fungicides that share a very similar molecule structure with the medical triazoles, and thus may have selected for mechanisms that confer resistance to both groups of compounds. It is important to explore further the presumed fungicide-driven route of resistance selection in order to implement effective preventive measures as the prevalence of azole resistance in A. fumigatus continues to increase and causes major challenges in the management of azole-resistant Aspergillus diseases.
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Affiliation(s)
- Paul E Verweij
- Department of Medical Microbiology and Nijmegen Institute for Infection, Inflammation and Immunity (N4i), Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Barton RC. Laboratory diagnosis of invasive aspergillosis: from diagnosis to prediction of outcome. SCIENTIFICA 2013; 2013:459405. [PMID: 24278780 PMCID: PMC3820361 DOI: 10.1155/2013/459405] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 11/14/2012] [Indexed: 06/02/2023]
Abstract
Invasive aspergillosis (IA), an infection caused by fungi in the genus Aspergillus, is seen in patients with immunological deficits, particularly acute leukaemia and stem cell transplantation, and has been associated with high rates of mortality in previous years. Diagnosing IA has long been problematic owing to the inability to culture the main causal agent A. fumigatus from blood. Microscopic examination and culture of respiratory tract specimens have lacked sensitivity, and biopsy tissue for histopathological examination is rarely obtainable. Thus, for many years there has been a great interest in nonculture-based techniques such as the detection of galactomannan, β -D-glucan, and DNA by PCR-based methods. Recent meta-analyses suggest that these approaches have broadly similar performance parameters in terms of sensitivity and specificity to diagnose IA. Improvements have been made in our understanding of the limitations of antigen assays and the standardisation of PCR-based DNA detection. Thus, in more recent years, the debate has focussed on how these assays can be incorporated into diagnostic strategies to maximise improvements in outcome whilst limiting unnecessary use of antifungal therapy. Furthermore, there is a current interest in applying these tests to monitor the effectiveness of therapy after diagnosis and predict clinical outcomes. The search for improved markers for the early and sensitive diagnosis of IA continues to be a challenge.
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Affiliation(s)
- Richard C. Barton
- Mycology Reference Centre, Department of Microbiology, Leeds Teaching Hospitals Trust, Leeds LS1 3EX, UK
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Du C, Wingard JR, Cheng S, Nguyen MH, Clancy CJ. Serum IgG Responses against Aspergillus Proteins before Hematopoietic Stem Cell Transplantation or Chemotherapy Identify Patients Who Develop Invasive Aspergillosis. Biol Blood Marrow Transplant 2012; 18:1927-34. [DOI: 10.1016/j.bbmt.2012.07.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 07/18/2012] [Indexed: 01/24/2023]
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van Toorenenbergen AW. Between-laboratory quality control of automated analysis of IgG antibodies against Aspergillus fumigatus. Diagn Microbiol Infect Dis 2012; 74:278-81. [PMID: 22925654 DOI: 10.1016/j.diagmicrobio.2012.07.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2012] [Revised: 07/12/2012] [Accepted: 07/16/2012] [Indexed: 11/28/2022]
Abstract
Measurement of IgG antibodies against Aspergillus fumigatus is an important criterion for the diagnosis of aspergilloma, allergic bronchopulmonary aspergillosis, and extrinsic allergic alveolitis. In the present study, we compared IgG antibody analysis against A. fumigatus using 2 widely used automated immunochemistry systems. In a between-laboratory quality control program, good agreement was found between the results from laboratories that used the ImmunoCAP system; however, a laboratory that used the Immulite 2000 system found approx. 2-fold higher antibody levels in the quality control samples than did the ImmunoCAP system. Measurements of IgG against A. fumigatus in patient sera were significantly correlated (r(s) = 0.77, P < 0.0001). These results demonstrate that analysis of IgG antibodies against A. fumigatus with these 2 systems has reached a level of standardization that allows for direct comparison of quantitative results from different laboratories. For longitudinal analysis of IgG against A. fumigatus, reagents from the same manufacturer should be used.
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Shi LN, Li FQ, Lu JF, Kong XX, Wang SQ, Huang M, Shao HF, Shao SH. Antibody specific to thioredoxin reductase as a new biomarker for serodiagnosis of invasive aspergillosis in non-neutropenic patients. Clin Chim Acta 2012; 413:938-43. [DOI: 10.1016/j.cca.2012.02.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 02/09/2012] [Accepted: 02/11/2012] [Indexed: 10/28/2022]
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Shi LN, Li FQ, Huang M, Lu JF, Kong XX, Wang SQ, Shao HF. Immunoproteomics based identification of thioredoxin reductase GliT and novel Aspergillus fumigatus antigens for serologic diagnosis of invasive aspergillosis. BMC Microbiol 2012; 12:11. [PMID: 22251604 PMCID: PMC3398318 DOI: 10.1186/1471-2180-12-11] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 01/18/2012] [Indexed: 01/14/2023] Open
Abstract
Background There has been a rising incidence of invasive aspergillosis (IA) in critically ill patients, even in the absence of an apparent predisposing immunodeficiency. The diagnosis of IA is difficult because clinical signs are not sensitive and specific, and serum galactomannan has relatively low sensitivity in this group of patients. Therefore, more prompt and accurate disease markers for early diagnosis are needed. To establish disease markers demands a thorough knowledge of fungal antigens which may be detected in the serum or other body fluids of patients. Herein we report novel immunodominant antigens identified from extracellular proteins of Aspergillus fumigatus. Results Extracellular proteins of A. fumigatus were separated by two-dimensional electrophoresis (2-DE) and probed with the sera from critically ill patients with proven IA. The immunoreactive protein spots were identified by MALDI-TOF mass spectrometry (MALDI-TOF -MS). Forty spots from 2DE gels were detected and 17 different proteins were identified as immunogenic in humans. Function annotation revealed that most of these proteins were metabolic enzymes involved in carbohydrate, fatty acid, amino acid, and energy metabolism. One of the proteins, thioredoxin reductase GliT (TR), which showed the best immunoactivity, was analyzed further for secretory signals, protein localization, and homology. The results indicated that TR is a secretory protein with a signal sequence exhibiting a high probability for secretion. Furthermore, TR did not match any human proteins, and had low homology with most other fungi. The recombinant TR was recognized by the sera of all proven IA patients with different underlying diseases in this study. Conclusions The immunoreactive proteins identified in this study may be helpful for the diagnosis of IA in critically ill patients. Our results indicate that TR and other immunodominant antigens have potential as biomarkers for the serologic diagnosis of invasive aspergillosis.
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Affiliation(s)
- Li-ning Shi
- Laboratory of Molecular Biology, Institute of Medical Laboratory Sciences, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing 210002, PR China
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Prospective evaluation of clinical and biological markers to predict the outcome of invasive pulmonary aspergillosis in hematological patients. J Clin Microbiol 2011; 50:823-30. [PMID: 22170907 DOI: 10.1128/jcm.00750-11] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Early evaluation of treatment efficacy in invasive aspergillosis (IA), a leading cause of morbidity and mortality in hematological patients, remains a challenge. We conducted a prospective study to evaluate the performance of different markers in predicting the outcome of patients with IA. Both clinical and biological criteria were assessed 7, 14, 21, and 45 days after inclusion in the study, and mortality was assessed at day 60. The association between baseline data and their evolution and the day 45 response to treatment was analyzed. A total of 57 patients (4 with proven, 44 with probable, and 9 with possible aspergillosis according to the revised EORTC/MSG [European Organization for Research and Treatment of Cancer/Invasive Fungal Infections Cooperative Group and National Institute of Allergy and Infectious Diseases Mycoses Study Group] definitions) were included. At day 45, 30 patients (53%) were determined to be responders, 25 (44%) were nonresponders, and 2 were not able to be evaluated. Twenty patients died within the 60 days of follow-up. We found that a poor day 45 outcome was associated with patients who had high baseline serum galactomannan (GM) antigen levels and those receiving steroids at the time of IA. A consistently negative serum GM index was associated with a good outcome, and the day 14 clinical evaluation was predictive of the day 45 outcome. No association was found between Aspergillus antibodies or DNA detection and patients' outcome. We conclude that the GM index value at diagnosis of IA, GM index kinetics, and clinical evaluation at day 14 are good markers for predicting the outcome of patients with IA and should be taken into account for adapting antifungal treatment.
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Hartmann T, Cairns TC, Olbermann P, Morschhäuser J, Bignell EM, Krappmann S. Oligopeptide transport and regulation of extracellular proteolysis are required for growth of Aspergillus fumigatus on complex substrates but not for virulence. Mol Microbiol 2011; 82:917-35. [DOI: 10.1111/j.1365-2958.2011.07868.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Delhaes L, Frealle E, Pinel C. Serum markers for allergic bronchopulmonary aspergillosis in cystic fibrosis: State of the art and further challenges. Med Mycol 2011; 48 Suppl 1:S77-87. [PMID: 21067334 DOI: 10.3109/13693786.2010.514301] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Allergic bronchopulmonary aspergillosis (ABPA), which results from hypersensitivity, primarily to Aspergillus, represents a severe complication in patients suffering from asthma or cystic fibrosis (CF). Since early treatment of ABPA is supposed to prevent long-term damages, ABPA has to be diagnosed promptly. However, this diagnosis is not straightforward due to clinical and radiological features of ABPA overlapping with those of CF. Despite ABPA specific diagnosis criteria proposed by the Cystic Fibrosis Foundation in 2003, making a definitive ABPA diagnosis in CF patients remains a challenge. Recent advances in the immunopathogenesis of ABPA have initiated the development of new serological tests, such as the recently reported detection of specific IgE to recombinant A. fumigatus allergens, or Thymus- and activation-regulated chemokine (TARC / CCL17), both of which are of value in the diagnosis of APBA. We review in this paper the serum markers that can advance ABPA diagnosis in CF patients, ranging from the well known criteria (anti-A. fumigatus IgE, IgG, and precipitins) to the recent biomarkers (IgE towards recombinant A. fumigatus allergens or TARC detection). Taking into account the up-dated physiopathology of ABPA, we discuss their place and their usefulness, especially TARC, to improve early ABPA detection and monitoring in CF patients.
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Affiliation(s)
- Laurence Delhaes
- University Lille Nord de France, University Hospital Centre, IFR, Institut Pasteur de Lille, France.
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Cattiaux L, Sendid B, Collot M, Machez E, Poulain D, Mallet JM. Synthetic biotinylated tetra β(1→5) galactofuranoside for in vitro aspergillosis diagnosis. Bioorg Med Chem 2010; 19:547-55. [PMID: 21129984 DOI: 10.1016/j.bmc.2010.10.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Revised: 10/23/2010] [Accepted: 10/29/2010] [Indexed: 10/18/2022]
Abstract
The synthesis of a tetra β(1→5) galactofuranoside was achieved using a thioglycoside donor with a methyl tert-butyl phenyl thio leaving group. This tetrasaccharide was conjugated to biotin and validated as antigen with the monoclonal antibody used for clinical detection of Aspergillus fumigatus galactomannan on streptavidin-coated microplates. Then we have shown its ability to detect antibodies associated with A. fumigatus induced disease by using sera from patients with Allergic broncho-pulmonary aspergillosis (ABPA) and correlated the results of antibody detection with those gained with a commercially available diagnostic test.
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Affiliation(s)
- Laurent Cattiaux
- UPMC-ENS-CNRS, Laboratoire de BioMolécules, UMR 7203, Fédération de Chimie Moléculaire FR 2769, Département de Chimie, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
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Allergic bronchopulmonary aspergillosis and Aspergillus infection in cystic fibrosis. Curr Opin Pulm Med 2010; 16:598-603. [DOI: 10.1097/mcp.0b013e32833e24a6] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sriranganadane D, Waridel P, Salamin K, Reichard U, Grouzmann E, Neuhaus JM, Quadroni M, Monod M. Aspergillus protein degradation pathways with different secreted protease sets at neutral and acidic pH. J Proteome Res 2010; 9:3511-9. [PMID: 20486678 DOI: 10.1021/pr901202z] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aspergillus fumigatus grows well at neutral and acidic pH in a medium containing protein as the sole nitrogen source by secreting two different sets of proteases. Neutral pH favors the secretion of neutral and alkaline endoproteases, leucine aminopeptidases (Laps) which are nonspecific monoaminopeptidases, and an X-prolyl dipeptidase (DppIV). Acidic pH environment promotes the secretion of an aspartic endoprotease of pepsin family (Pep1) and tripeptidyl-peptidases of the sedolisin family (SedB and SedD). A novel prolyl peptidase, AfuS28, was found to be secreted in both alkaline and acidic conditions. In previous studies, Laps were shown to degrade peptides from their N-terminus until an X-Pro sequence acts as a stop signal. X-Pro sequences can be then removed by DppIV, which allows Laps access to the following residues. We have shown that at acidic pH Seds degrade large peptides from their N-terminus into tripeptides until Pro in P1 or P'1 position acts as a stop for these exopeptidases. However, X-X-Pro and X-X-X-Pro sequences can be removed by AfuS28 thus allowing Seds further sequential proteolysis. In conclusion, both alkaline and acidic sets of proteases contain exoprotease activity capable of cleaving after proline residues that cannot be removed during sequential digestion by nonspecific exopeptidases.
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Affiliation(s)
- Dev Sriranganadane
- Department of Dermatology, Centre Hospitalier Universitaire Vaudois, 1011 Lausanne, Switzerland
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Singh B, Sharma GL, Oellerich M, Kumar R, Singh S, Bhadoria DP, Katyal A, Reichard U, Asif AR. Novel cytosolic allergens of Aspergillus fumigatus identified from germinating conidia. J Proteome Res 2010; 9:5530-41. [PMID: 20828162 DOI: 10.1021/pr100605c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aspergillus fumigatus is the common cause of allergic broncho-pulmonary aspergillosis (ABPA) and most of the allergens have been described from its secreted fraction. In the present investigation, germinating conidial cytosolic proteins of A. fumigatus were extracted from a 16 h culture. The proteome from this fraction was developed, and immuno-blots were generated using pooled ABPA patients' sera. Well separated Immunoglobulin-E (IgE) and Immunoglobulin-G (IgG) reactive spots were picked from corresponding 2DE gels and subjected to mass spectrometric analysis. As a result, 66 immuno-reactive proteins were identified from two geographically different strains (190/96 and DAYA) of A. fumigatus. Only 3 out of 66 proteins reacted with IgG, and the remaining 63 proteins were found to be IgE reactive. These 63 IgE-reactive cytosolic proteins from germinating conidia included 2 already known (Asp f12 and Asp f22) and 4 predicted allergens (Hsp88, Hsp70, malate dehydrogenase, and alcohol dehydrogenase) based on their homology with other known fungal allergens. In view of this, the panel of presently identified IgE-reactive novel proteins holds the potential of providing a basis for the wider diagnostic application in assay for allergic aspergillosis. We could demonstrate that recombinantly expressed proteins from this panel showed consistent reactivity with IgE of individual sera of ABPA patients. The recombinantly expressed proteins may also be useful in desensitization therapy of allergic disorders including ABPA.
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Affiliation(s)
- Bharat Singh
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, Delhi-110007, India
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Singh B, Oellerich M, Kumar R, Kumar M, Bhadoria DP, Reichard U, Gupta VK, Sharma GL, Asif AR. Immuno-Reactive Molecules Identified from the Secreted Proteome of Aspergillus fumigatus. J Proteome Res 2010; 9:5517-29. [DOI: 10.1021/pr100604x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Bharat Singh
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Michael Oellerich
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Ram Kumar
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Manish Kumar
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Dharam P. Bhadoria
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Utz Reichard
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Vijay K. Gupta
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Gainda L. Sharma
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Abdul R. Asif
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
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Recombinant allergens combined with biological markers in the diagnosis of allergic bronchopulmonary aspergillosis in cystic fibrosis patients. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2010; 17:1330-6. [PMID: 20631331 DOI: 10.1128/cvi.00200-10] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Allergic bronchopulmonary aspergillosis (ABPA) is a frequent complication in cystic fibrosis patients. The diagnosis remains difficult and requires a combination of clinical, radiological, biological, and mycological criteria. The aim of this study was to analyze the added value of two recombinant antigens, rAspf4 and rAspf6, associated with the detection of specific IgG; precipitins; total IgE; and Aspergillus fumigatus in sputum for the diagnosis of ABPA. In a retrospective study, we determined the specific IgE responses to these recombinants in 133 sera of 65 cystic fibrosis patients. We selected an average of five serum samples from each of the 17 patients with ABPA (13 proven and 4 probable ABPA) and from 3 patients with Aspergillus bronchitis and rhinosinusitis. One serum sample for the 45 patients without ABPA was tested. The sensitivity of specific IgE detection against rAspf4 calculated per patient (92.3%) was significantly higher (P < 0.05) than that of rAspf6 (53.8%). When rAspf4 IgE detection was associated with anti-Aspergillus IgG enzyme-linked immunosorbent assay (ELISA) and precipitin detection, the sensitivity rose to 100%. The specificities of rAspf4 and rAspf6 IgE detection were 93.7% and 91.6%, respectively. Other diagnostic criteria had slightly lower specificities (87.5% for anti-Aspergillus IgG ELISA, 89.6% for precipitins, 84.4% for total IgE, and 85.0% for positive A. fumigatus culture in sputum). In conclusion, this retrospective study showed the relevance of rAspf4 IgE detection, in combination with other biological markers (Aspergillus IgG ELISA, precipitins, and total IgE), for improving the biological diagnosis of ABPA.
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