1
|
Hernández-Chávez MJ, Martínez-Duncker I, Clavijo-Giraldo DM, López-Ramirez LA, Mora-Montes HM. Candida tropicalis PMT2 Is a Dispensable Gene for Viability but Required for Proper Interaction with the Host. J Fungi (Basel) 2024; 10:502. [PMID: 39057387 PMCID: PMC11277967 DOI: 10.3390/jof10070502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 07/17/2024] [Accepted: 07/18/2024] [Indexed: 07/28/2024] Open
Abstract
Candidemia is an opportunistic mycosis with high morbidity and mortality rates. Even though Candida albicans is the main causative agent, other Candida species, such as Candida tropicalis, are relevant etiological agents of candidiasis and candidemia. Compared with C. albicans, there is currently limited information about C. tropicalis' biological aspects, including those related to the cell wall and the interaction with the host. Currently, it is known that its cell wall contains O-linked mannans, and the contribution of these structures to cell fitness has previously been addressed using cells subjected to chemical treatments or in mutants where O-linked mannans and other wall components are affected. Here, we generated a C. tropicalis pmt2∆ null mutant, which was affected in the first step of the O-linked mannosylation pathway. The null mutant was viable, contrasting with C. albicans where this gene is essential. The phenotypical characterization showed that O-linked mannans were required for filamentation; proper cell wall integrity and organization; biofilm formation; protein secretion; and adhesion to extracellular matrix components, in particular to fibronectin; and type I and type II collagen. When interacting with human innate immune cells, it was found that this cell wall structure is dispensable for cytokine production, but mutant cells were more phagocytosed by monocyte-derived macrophages. Furthermore, the null mutant cells showed virulence attenuation in Galleria mellonella larvae. Thus, O-linked mannans are minor components of the cell wall that are involved in different aspects of C. tropicalis' biology.
Collapse
Affiliation(s)
- Marco J. Hernández-Chávez
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta s/n, col. Noria Alta, C.P., Guanajuato 36050, GTO, Mexico; (M.J.H.-C.); (D.M.C.-G.); (L.A.L.-R.)
| | - Iván Martínez-Duncker
- Laboratorio de Glicobiología Humana y Diagnóstico Molecular, Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, MOR, Mexico;
| | - Diana M. Clavijo-Giraldo
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta s/n, col. Noria Alta, C.P., Guanajuato 36050, GTO, Mexico; (M.J.H.-C.); (D.M.C.-G.); (L.A.L.-R.)
| | - Luz A. López-Ramirez
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta s/n, col. Noria Alta, C.P., Guanajuato 36050, GTO, Mexico; (M.J.H.-C.); (D.M.C.-G.); (L.A.L.-R.)
| | - Héctor M. Mora-Montes
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta s/n, col. Noria Alta, C.P., Guanajuato 36050, GTO, Mexico; (M.J.H.-C.); (D.M.C.-G.); (L.A.L.-R.)
| |
Collapse
|
2
|
Caggiano G, Fioriti S, Morroni G, Apollonio F, Triggiano F, D'Achille G, Stefanizzi P, Dalfino L, Ronga L, Mosca A, Sparapano E, De Carlo C, Signorile F, Grasso S, Barchiesi F, Montagna MT. Genotypic and phenotypic characteristics of Candida parapsilosis bloodstream isolates: Health Care Associated Infections in a teaching Hospital in Italy. J Infect Public Health 2024; 17:967-974. [PMID: 38631066 DOI: 10.1016/j.jiph.2024.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/09/2024] [Accepted: 04/09/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND Candidemia is the most common healthcare associated invasive fungal infection. Over the last few decades, candidemia caused by Candida species other than Candida albicans, particularly the Candida parapsilosis complex, has emerged worldwide. The aims of this study were: to analyze the genotypic and phenotypic characteristics of C. parapsilosis strains isolated from blood cultures and the environment in a hospital in southern Italy, to study the possible source of infection and to correlate the isolated strains. METHODS From April to October 2022, cases of candidemia due to C. parapsilosis in patients admitted to a hospital in the Apulia region were investigated. However, 119 environmental samples from the intensive care unit were collected for identification of the likely environmental reservoir of infection. Routine antifungal (amphotericin B, anidulafungin, fluconazole) susceptibility was performed on all isolates. Whole genome sequencing was performed to study the genotypic correlation of the isolates. Biofilm biomass and metabolic activity were also quantified for all isolates. RESULTS A total of 43 C. parapsilosis isolates were cultured from the bloodstream of each patient in different departments, and seven surface samples were positive for C. parapsilosis. Most of the isolated yeasts (41/50; 85 %) were resistant to fluconazole and were genetically related to each other, suggesting an ongoing clonal outbreak of this pathogen. The fluconazole-susceptible isolates produced significantly more biofilm than did the resistant isolates. Metabolic activity was also higher for fluconazole-susceptible than resistant isolates. CONCLUSION Cross-transmission of the microorganisms is suggested by the phenotypic similarity and genetic correlation between clinical and environmental strains observed in our study.
Collapse
Affiliation(s)
- Giuseppina Caggiano
- Interdisciplinary Department of Medicine, Hygiene Section, University of Bari Aldo Moro, Piazza G. Cesare 11, Bari 70124, Italy.
| | - Simona Fioriti
- Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Gianluca Morroni
- Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Francesca Apollonio
- Interdisciplinary Department of Medicine, Hygiene Section, University of Bari Aldo Moro, Piazza G. Cesare 11, Bari 70124, Italy
| | - Francesco Triggiano
- Interdisciplinary Department of Medicine, Hygiene Section, University of Bari Aldo Moro, Piazza G. Cesare 11, Bari 70124, Italy
| | - Gloria D'Achille
- Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Pasquale Stefanizzi
- Interdisciplinary Department of Medicine, Hygiene Section, University of Bari Aldo Moro, Piazza G. Cesare 11, Bari 70124, Italy
| | - Lidia Dalfino
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Anesthesiology and Intensive Care Medicine, University of Bari Aldo Moro
| | - Luigi Ronga
- Microbiology and Virology Unit, Azienda OU Policlinico of Bari, Piazza Giulio Cesare 11, Bari 70124, Italy
| | - Adriana Mosca
- Interdisciplinary Department of Medicine, Microbiology Section, University of Bari Aldo Moro, Piazza G. Cesare 11, Bari 70124, Italy
| | - Eleonora Sparapano
- Microbiology and Virology Unit, Azienda OU Policlinico of Bari, Piazza Giulio Cesare 11, Bari 70124, Italy
| | - Carmela De Carlo
- Microbiology and Virology Unit, Azienda OU Policlinico of Bari, Piazza Giulio Cesare 11, Bari 70124, Italy
| | - Fabio Signorile
- Clinic of Infectious diseases, Department of Precision and Regenerative Medicine and Ionian Area, University of Bari, Policlinic of Bari, Piazza Giulio Cesare 11, Bari 70124, Italy
| | - Salvatore Grasso
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Anesthesiology and Intensive Care Medicine, University of Bari Aldo Moro
| | - Francesco Barchiesi
- Department of Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy; Clinic of Infectious Diseases, Azienda Sanitaria Territoriale 1, Pesaro-Urbino, Italy.
| | - Maria Teresa Montagna
- Interdisciplinary Department of Medicine, Hygiene Section, University of Bari Aldo Moro, Piazza G. Cesare 11, Bari 70124, Italy
| |
Collapse
|
3
|
Wang LL, Huang SJ, Zhao JT, Liu JY, Xiang MJ. Regulatory role of Mss11 in Candida glabrata virulence: adhesion and biofilm formation. Front Cell Infect Microbiol 2024; 13:1321094. [PMID: 38239503 PMCID: PMC10794409 DOI: 10.3389/fcimb.2023.1321094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 12/11/2023] [Indexed: 01/22/2024] Open
Abstract
Introduction Candida glabrata has emerged as a fungal pathogen with high infection and mortality rates, and its primary virulence factors are related to adhesion and biofilm formation. These virulence factors in C.glabrata are primarily mediated by epithelial adhesins (Epas), most of which are encoded in subtelomeric regions and regulated by subtelomeric silencing mechanisms. The transcription factor Mss11, known for its regulatory role in adhesion, biofilm formation, and filamentous growth in Saccharomyces cerevisiae and Candida albicans, has also been implicated in the expression of EPA6, suggesting its potential influence on C.glabrata virulence. The present study aims to determine the regulatory role of Mss11 in the virulence of C. glabrata. Methods In this work, a Δmss11 null mutant and its complemented strain were constructed from a C.glabrata standard strain. The impact of the transcription factor Mss11 on the virulence of C.glabrata was investigated through a series of phenotypic experiments, including the microbial adhesion to hydrocarbons (MATH) test, adherence assay, biofilm assay, scanning electron microscopy and Galleria mellonella virulence assay. Furthermore, transcriptome sequencing, quantitative reverse transcription polymerase chain reaction (RT-qPCR), and chromatin immunoprecipitation sequencing (ChIP-seq) were employed to investigate the molecular mechanisms behind the regulation of Mss11. Results In C.glabrata, the loss of MSS11 led to a significant reduction in several virulence factors including cell surface hydrophobicity, epithelial cell adhesion, and biofilm formation. These observations were consistent with the decreased virulence of the Δmss11 mutant observed in the Galleria mellonella infection model. Further exploration demonstrated that Mss11 modulates C. glabrata virulence by regulating EPA1 and EPA6 expression. It binds to the upstream regions of EPA1 and EPA6, as well as the promoter regions of the subtelomeric silencing-related genes SIR4, RIF1, and RAP1, indicating the dual regulatory role of Mss11. Conclusion Mss11 plays a crucial role in C. glabrata adhesion and biofilm formation, and thus has a broad influence on virulence. This regulation is achieved by regulating the expression of EPA1 and EPA6 through both promoter-specific regulation and subtelomeric silencing.
Collapse
Affiliation(s)
- Lu-Ling Wang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Laboratory Medicine, Ruijin Hospital Luwan Branch, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Si-Jia Huang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Laboratory Medicine, Ruijin Hospital Luwan Branch, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun-Tao Zhao
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jin-Yan Liu
- Department of Laboratory Medicine, Ruijin Hospital Luwan Branch, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ming-Jie Xiang
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Laboratory Medicine, Ruijin Hospital Luwan Branch, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| |
Collapse
|
4
|
Egger M, Salmanton-García J, Barac A, Gangneux JP, Guegan H, Arsic-Arsenijevic V, Matos T, Tomazin R, Klimko N, Bassetti M, Hammarström H, Meijer EFJ, Meis JF, Prattes J, Krause R, Resat Sipahi O, Scharmann U, White PL, Desoubeaux G, García-Rodríguez J, Garcia-Vidal C, Martín-Pérez S, Ruiz M, Tumbarello M, Talento AF, Rogers B, Lagrou K, van Praet J, Arikan-Akdagli S, Arendrup MC, Koehler P, Cornely OA, Hoenigl M. Predictors for Prolonged Hospital Stay Solely to Complete Intravenous Antifungal Treatment in Patients with Candidemia: Results from the ECMM Candida III Multinational European Observational Cohort Study. Mycopathologia 2023; 188:983-994. [PMID: 37566212 PMCID: PMC10687104 DOI: 10.1007/s11046-023-00776-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 07/11/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND To date, azoles represent the only viable option for oral treatment of invasive Candida infections, while rates of azole resistance among non-albicans Candida spp. continue to increase. The objective of this sub-analysis of the European multicenter observational cohort study Candida III was to describe demographical and clinical characteristics of the cohort requiring prolonged hospitalization solely to complete intravenous (iv) antifungal treatment (AF Tx). METHODS Each participating hospital (number of eligible hospitals per country determined by population size) included the first ~ 10 blood culture proven adult candidemia cases occurring consecutively after July 1st, 2018, and treating physicians answered the question on whether hospital stay was prolonged only for completion of intravenous antifungal therapy. Descriptive analyses as well as binary logistic regression was used to assess for predictors of prolonged hospitalization solely to complete iv AF Tx. FINDINGS Hospital stay was prolonged solely for the completion of iv AF Tx in 16% (100/621) of candidemia cases by a median of 16 days (IQR 8 - 28). In the multivariable model, initial echinocandin treatment was a positive predictor for prolonged hospitalization to complete iv AF Tx (aOR 2.87, 95% CI 1.55 - 5.32, p < 0.001), while (i) neutropenia, (ii) intensive care unit admission, (iii) catheter related candidemia, (iv) total parenteral nutrition, and (v) C. parapsilosis as causative pathogen were found to be negative predictors (aOR 0.22 - 0.45; p < 0.03). INTERPRETATION Hospital stays were prolonged due to need of iv AF Tx in 16% of patients with candidemia. Those patients were more likely to receive echinocandins as initial treatment and were less severely ill and less likely infected with C. parapsilosis.
Collapse
Affiliation(s)
- Matthias Egger
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036, Graz, Austria
- Biotech Med, Graz, Austria
- Translational Medical Mycology Research Unit, ECMM Excellence Center for Medical Mycology, Medical University of Graz, Graz, Austria
| | - Jon Salmanton-García
- Faculty of Medicine and University Hospital Cologne, Institute of Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany
- Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, Excellence Center for Medical Mycology, University of Cologne, Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Aleksandra Barac
- Clinic for Infectious and Tropical Diseases, University Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Jean-Pierre Gangneux
- CHU Rennes, Inserm, EHESP, Irset (Institut de Recherche en santé, environnement et travail), Univ Rennes, UMR_S 1085, 35000, Rennes, France
| | - Hélène Guegan
- CHU Rennes, Inserm, EHESP, Irset (Institut de Recherche en santé, environnement et travail), Univ Rennes, UMR_S 1085, 35000, Rennes, France
| | - Valentina Arsic-Arsenijevic
- Faculty of Medicine, Institute of Microbiology and Immunology, Medical Mycology Reference Laboratory (MMRL), University of Belgrade, Belgrade, Serbia
- Centre for Microbiology, Institute of Public Health of Vojvodina, Novi Sad, Serbia
| | - Tadeja Matos
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Rok Tomazin
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Nikolai Klimko
- Department of Clinical Mycology, Allergy and Immunology, North Western State Medical University, St Petersburg, Russia
| | - Matteo Bassetti
- Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy
- IRCCS Ospedale Policlinico San Martino, Infectious Diseases Unit, Genoa, Italy
| | - Helena Hammarström
- Department of Infectious Diseases, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Eelco F J Meijer
- Medical Microbiology and Infectious Diseases, Canisius-Wilhelmina Hospital (CWZ), Nijmegen, the Netherlands
- Center of Expertise for Mycology Radboudumc-CWZ, Nijmegen, the Netherlands
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jacques F Meis
- Medical Microbiology and Infectious Diseases, Canisius-Wilhelmina Hospital (CWZ), Nijmegen, the Netherlands
- Center of Expertise for Mycology Radboudumc-CWZ, Nijmegen, the Netherlands
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Juergen Prattes
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036, Graz, Austria
- Biotech Med, Graz, Austria
- Translational Medical Mycology Research Unit, ECMM Excellence Center for Medical Mycology, Medical University of Graz, Graz, Austria
| | - Robert Krause
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036, Graz, Austria
- Biotech Med, Graz, Austria
- Translational Medical Mycology Research Unit, ECMM Excellence Center for Medical Mycology, Medical University of Graz, Graz, Austria
| | - Oguz Resat Sipahi
- Department of Infectious Diseases and Clinical Microbiology, Ege University Faculty of Medicine, Izmir, Turkey
| | - Ulrike Scharmann
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - P Lewis White
- Public Health Wales, Center for Trials Research/Division of Infection/Immunity, Microbiology Cardiff and Cardiff University, Cardiff, UK
| | - Guillaume Desoubeaux
- Department of Parasitology-Mycology-Tropical Medicine, CHRU de Tours, Tours, France
| | | | | | | | - Maite Ruiz
- Unit of Infectious Diseases and Microbiology, Institute of Biomedicine of Seville, University Hospital Virgen del Rocio, Seville, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas, Madrid, Spain
| | | | | | - Benedict Rogers
- Department of Clinical Microbiology, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Katrien Lagrou
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Louvain, Belgium
- Department of Laboratory Medicine, and National Reference Centre for Mycosis, University Hospitals Leuven, Louvain, Belgium
| | - Jens van Praet
- Nephrology and Infectious Diseases, AZ Sint-Jan Brugge Oostende AV, Brugge, Belgium
| | - Sevtap Arikan-Akdagli
- Department of Medical Microbiology, Hacettepe University Medical School, Ankara, Turkey
| | - Maiken C Arendrup
- Unit of Mycology, Statens Serum Institut, Copenhagen, Denmark
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Philipp Koehler
- Faculty of Medicine and University Hospital Cologne, Institute of Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany
- Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, Excellence Center for Medical Mycology, University of Cologne, Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Oliver A Cornely
- Faculty of Medicine and University Hospital Cologne, Institute of Translational Research, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany
- Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, Excellence Center for Medical Mycology, University of Cologne, Cologne, Germany
- German Centre for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
- Faculty of Medicine and University Hospital Cologne, Clinical Trials Centre Cologne (ZKS Köln), University of Cologne, Cologne, Germany
| | - Martin Hoenigl
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Auenbruggerplatz 15, 8036, Graz, Austria.
- Biotech Med, Graz, Austria.
- Translational Medical Mycology Research Unit, ECMM Excellence Center for Medical Mycology, Medical University of Graz, Graz, Austria.
| |
Collapse
|