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Zhang Y, Huang S, Guo Y, Xie X, Chen G, Cao C, Hu D, Cheng S. Chitosan from the base of Flammulina velutipes stipe alleviates oral Candida albicans infection via modulating Th-17 cell differentiation and Streptococcus mutans. Int J Biol Macromol 2024:132879. [PMID: 38838899 DOI: 10.1016/j.ijbiomac.2024.132879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 05/17/2024] [Accepted: 06/01/2024] [Indexed: 06/07/2024]
Abstract
The base of Flammulina velutipes (F. velutipes) stipe are agricultural wastes generated during the cultivation of edible fungus F. velutipes with high amount of chitin. Herein, this study firstly prepared chitosan from the base of F. velutipes stipe (FVC) and its structure was identified. It was confirmed that FVC acted as an antigenic substance to activate the immune system in vivo and in vitro, drive T cells to differentiate into Th-17 cells, and establish an effective mucosal immune barrier in the oral cavity, thus inhibited C. albicans infection; On the other hand, FVC maintained the oral flora stability and significantly reduced the abundance of Streptococcus spp., which was closely related to C. albicans infection. On this basis, the inhibitory effects of FVC on oral pathogens Streptococcus mutans and Lactobacillus casei associated with C. albicans infection were further verified, and it was demonstrated that FVC effectively interfered with the growth of pathogenic bacteria by inducing the production of intracellular ROS to damage bacterial cells. Therefore, FVC may be potentially exploited as a novel approach to the prevention and treatment of oral C. albicans infection.
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Affiliation(s)
- Yuanxin Zhang
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Shuting Huang
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China.
| | - Yuheng Guo
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Xiaoyun Xie
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Guitang Chen
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Chongjiang Cao
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China
| | - Dejun Hu
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China.
| | - Shujie Cheng
- Department of Food Nutrition and Safety/National R&D Center for Chinese Herbal Medicine Processing, School of Engineering, China Pharmaceutical University, Nanjing 211198, China.
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Mulato-Briones IB, Rodriguez-Ildefonso IO, Jiménez-Tenorio JA, Cauich-Sánchez PI, Méndez-Tovar MDS, Aparicio-Ozores G, Bautista-Hernández MY, González-Parra JF, Cruz-Hernández J, López-Romero R, del Rosario Rojas-Sánchez TM, García-Palacios R, Garay-Villar Ó, Apresa-García T, López-Esparza J, Marrero D, Castelán-Vega JA, Jiménez-Alberto A, Salcedo M, Ribas-Aparicio RM. Cultivable Microbiome Approach Applied to Cervical Cancer Exploration. Cancers (Basel) 2024; 16:314. [PMID: 38254804 PMCID: PMC10813707 DOI: 10.3390/cancers16020314] [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: 09/13/2023] [Revised: 10/25/2023] [Accepted: 10/30/2023] [Indexed: 01/24/2024] Open
Abstract
Traditional microbiological methodology is valuable and essential for microbiota composition description and microbe role assignations at different anatomical sites, including cervical and vaginal tissues; that, combined with molecular biology strategies and modern identification approaches, could give a better perspective of the microbiome under different circumstances. This pilot work aimed to describe the differences in microbiota composition in non-cancer women and women with cervical cancer through a culturomics approach combining culture techniques with Vitek mass spectrometry and 16S rDNA sequencing. To determine the possible differences, diverse statistical, diversity, and multivariate analyses were applied; the results indicated a different microbiota composition between non-cancer women and cervical cancer patients. The Firmicutes phylum dominated the non-cancer (NC) group, whereas the cervical cancer (CC) group was characterized by the predominance of Firmicutes and Proteobacteria phyla; there was a depletion of lactic acid bacteria, an increase in the diversity of anaerobes, and opportunistic and non-typical human microbiota isolates were present. In this context, we hypothesize and propose a model in which microbial composition and dynamics may be essential for maintaining the balance in the cervical microenvironment or can be pro-oncogenesis microenvironmental mediators in a process called Ying-Yang or have a protagonist/antagonist microbiota role.
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Affiliation(s)
- Irma Berenice Mulato-Briones
- Laboratorio de Producción y Control de Biológicos, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (I.B.M.-B.); (I.O.R.-I.); (J.A.J.-T.); (J.A.C.-V.); (A.J.-A.)
- Unidad de Investigación en Biomedicina y Oncología Genómica (UIBOG), del Hospital de Gineco Pediatría No. 3A, del Instituto Mexicano del Seguro Social (IMSS), Mexico City 07300, Mexico;
- Laboratorio de Biotecnología Molecular y Farmacéutica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico
| | - Ismael Olan Rodriguez-Ildefonso
- Laboratorio de Producción y Control de Biológicos, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (I.B.M.-B.); (I.O.R.-I.); (J.A.J.-T.); (J.A.C.-V.); (A.J.-A.)
- Unidad de Investigación en Biomedicina y Oncología Genómica (UIBOG), del Hospital de Gineco Pediatría No. 3A, del Instituto Mexicano del Seguro Social (IMSS), Mexico City 07300, Mexico;
- Laboratorio de Biotecnología Molecular y Farmacéutica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico
| | - Julián Antonio Jiménez-Tenorio
- Laboratorio de Producción y Control de Biológicos, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (I.B.M.-B.); (I.O.R.-I.); (J.A.J.-T.); (J.A.C.-V.); (A.J.-A.)
- Unidad de Investigación en Biomedicina y Oncología Genómica (UIBOG), del Hospital de Gineco Pediatría No. 3A, del Instituto Mexicano del Seguro Social (IMSS), Mexico City 07300, Mexico;
| | - Patricia Isidra Cauich-Sánchez
- Laboratorio de Bacteriología Médica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (P.I.C.-S.); (G.A.-O.)
| | - María del Socorro Méndez-Tovar
- Laboratorio de Bacteriología Clínica, Hospital General, Centro Médico Nacional “La Raza”, IMSS, Mexico City 02990, Mexico;
| | - Gerardo Aparicio-Ozores
- Laboratorio de Bacteriología Médica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (P.I.C.-S.); (G.A.-O.)
| | - María Yicel Bautista-Hernández
- Unidad de Radiología, Hospital General de México “Dr. Eduardo Liceaga”, Secretaría de Salud, Mexico City 07300, Mexico; (M.Y.B.-H.); (J.F.G.-P.); (J.C.-H.)
| | - Juan Francisco González-Parra
- Unidad de Radiología, Hospital General de México “Dr. Eduardo Liceaga”, Secretaría de Salud, Mexico City 07300, Mexico; (M.Y.B.-H.); (J.F.G.-P.); (J.C.-H.)
| | - Jesús Cruz-Hernández
- Unidad de Radiología, Hospital General de México “Dr. Eduardo Liceaga”, Secretaría de Salud, Mexico City 07300, Mexico; (M.Y.B.-H.); (J.F.G.-P.); (J.C.-H.)
| | - Ricardo López-Romero
- Unidad de Investigación en Biomedicina y Oncología Genómica (UIBOG), del Hospital de Gineco Pediatría No. 3A, del Instituto Mexicano del Seguro Social (IMSS), Mexico City 07300, Mexico;
| | | | | | - Ónix Garay-Villar
- Departamento de Braquiterapia, Hospital de Oncología, Centro Médico Nacional Siglo XXI, IMSS (DBHOCMN-IMSS), Mexico City 07300, Mexico;
| | - Teresa Apresa-García
- Unidad de Investigación Médica en Enfermedades Oncológicas, Hospital de Oncología, Centro Médico Nacional Siglo XXI, IMSS, Mexico City 07300, Mexico;
| | - Juan López-Esparza
- Laboratorio de H109, Academia de Microbiología, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez 32310, Mexico;
| | - Daniel Marrero
- Unidad de Investigación Médica en Enfermedades Endocrinas, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, IMSS, Mexico City 07300, Mexico;
| | - Juan Arturo Castelán-Vega
- Laboratorio de Producción y Control de Biológicos, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (I.B.M.-B.); (I.O.R.-I.); (J.A.J.-T.); (J.A.C.-V.); (A.J.-A.)
- Laboratorio de Biotecnología Molecular y Farmacéutica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico
| | - Alicia Jiménez-Alberto
- Laboratorio de Producción y Control de Biológicos, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (I.B.M.-B.); (I.O.R.-I.); (J.A.J.-T.); (J.A.C.-V.); (A.J.-A.)
- Laboratorio de Biotecnología Molecular y Farmacéutica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico
| | - Mauricio Salcedo
- Unidad de Investigación en Biomedicina y Oncología Genómica (UIBOG), del Hospital de Gineco Pediatría No. 3A, del Instituto Mexicano del Seguro Social (IMSS), Mexico City 07300, Mexico;
| | - Rosa María Ribas-Aparicio
- Laboratorio de Producción y Control de Biológicos, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico; (I.B.M.-B.); (I.O.R.-I.); (J.A.J.-T.); (J.A.C.-V.); (A.J.-A.)
- Laboratorio de Biotecnología Molecular y Farmacéutica, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City 11350, Mexico
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Acuna E, Ndlovu E, Molaeitabari A, Shahina Z, Dahms TES. Carvacrol-Induced Vacuole Dysfunction and Morphological Consequences in Nakaseomyces glabratus and Candida albicans. Microorganisms 2023; 11:2915. [PMID: 38138059 PMCID: PMC10745442 DOI: 10.3390/microorganisms11122915] [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: 10/27/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023] Open
Abstract
With the prevalence of systemic fungal infections caused by Candida albicans and non-albicans species and their resistance to classical antifungals, there is an urgent need to explore alternatives. Herein, we evaluate the impact of the monoterpene carvacrol, a major component of oregano and thyme oils, on clinical and laboratory strains of C. albicans and Nakaseomyces glabratus. Carvacrol induces a wide range of antifungal effects, including the inhibition of growth and hyphal and biofilm formation. Using biochemical and microscopic approaches, we elucidate carvacrol-induced hyphal inhibition. The significantly reduced survival rates following exposure to carvacrol were accompanied by dose-dependent vacuolar acidification, disrupted membrane integrity, and aberrant morphology. Germ tube assays, used to elucidate the relationship between vacuolar dysfunction and hyphal inhibition, showed that carvacrol significantly reduced hyphal formation, which was accompanied by a defective C. albicans morphology. Thus, we show a link between vacuolar acidification/disrupted vacuole membrane integrity and compromised candidal morphology/morphogenesis, demonstrating that carvacrol exerts its anti-hyphal activity by altering vacuole integrity.
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Affiliation(s)
| | | | | | - Zinnat Shahina
- Department of Chemistry and Biochemistry, University of Regina, Regina, SK S4S 1P4, Canada; (E.A.)
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Marcut L, Mohan AG, Corneschi I, Grosu E, Paltanea G, Avram I, Badaluta AV, Vasilievici G, Nicolae CA, Ditu LM. Improving the Hydrophobicity of Plasticized Polyvinyl Chloride for Use in an Endotracheal Tube. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7089. [PMID: 38005019 PMCID: PMC10672304 DOI: 10.3390/ma16227089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/26/2023] [Accepted: 10/29/2023] [Indexed: 11/26/2023]
Abstract
An endotracheal tube (ETT) is a greatly appreciated medical device at the global level with widespread application in the treatment of respiratory diseases, such as bronchitis and asthma, and in general anesthesia, to provide narcotic gases. Since an important quantitative request for cuffed ETTs was recorded during the COVID-19 pandemic, concerns about infection have risen. The plasticized polyvinyl chloride (PVC) material used to manufacture ETTs favors the attachment of microorganisms from the human biological environment and the migration of plasticizer from the polymer that feeds the microorganisms and promotes the growth of biofilms. This leads to developing infections, which means additional suffering, discomfort for patients, and increased hospital costs. In this work, we propose to modify the surfaces of some samples taken from commercial ETTs in order to develop their hydrophobic character using surface fluorination by a plasma treatment in SF6 discharge and magnetron sputtering physical evaporation from the PTFE target. Samples with surfaces thus modified were subsequently tested using XPS, ATR-FTIR, CA, SEM + EDAX, profilometry, density, Shore A hardness, TGA-DSC, and biological antimicrobial and biocompatibility properties. The obtained results demonstrate a successful increase in the hydrophobic character of the plasticized PVC samples and biocompatibility properties.
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Affiliation(s)
- Lavinia Marcut
- Faculty of Medicine and Pharmacy, University of Oradea, 10 P-ta 1 December Street, RO-410073 Oradea, Romania; (L.M.); (A.G.M.)
- Intensive Care Unit, Clinical Emergency Hospital Oradea, 65 Gheorghe Doja Street, RO-410169 Oradea, Romania
| | - Aurel George Mohan
- Faculty of Medicine and Pharmacy, University of Oradea, 10 P-ta 1 December Street, RO-410073 Oradea, Romania; (L.M.); (A.G.M.)
- Department of Neurosurgery, Clinical Emergency Hospital Oradea, 65 Gheorghe Doja Street, RO-410169 Oradea, Romania
| | - Iuliana Corneschi
- Faculty of Material Science and Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, District 6, RO-060042 Bucharest, Romania;
| | - Elena Grosu
- Faculty of Material Science and Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, District 6, RO-060042 Bucharest, Romania;
| | - Gheorghe Paltanea
- Faculty of Electrical Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, District 6, RO-060042 Bucharest, Romania;
| | - Ionela Avram
- Faculty of Biology, Botanic and Microbiology Department, University of Bucharest, 3, Aleea Portocalelor, District 5, Grădina Botanică, RO-050095 Bucharest, Romania; (I.A.); (A.V.B.); (L.M.D.)
| | - Alexandra Valentina Badaluta
- Faculty of Biology, Botanic and Microbiology Department, University of Bucharest, 3, Aleea Portocalelor, District 5, Grădina Botanică, RO-050095 Bucharest, Romania; (I.A.); (A.V.B.); (L.M.D.)
| | - Gabriel Vasilievici
- National Institute for Research & Development in Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independenței, District 6, RO-060021 Bucharest, Romania; (G.V.); (C.-A.N.)
| | - Cristian-Andi Nicolae
- National Institute for Research & Development in Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independenței, District 6, RO-060021 Bucharest, Romania; (G.V.); (C.-A.N.)
| | - Lia Mara Ditu
- Faculty of Biology, Botanic and Microbiology Department, University of Bucharest, 3, Aleea Portocalelor, District 5, Grădina Botanică, RO-050095 Bucharest, Romania; (I.A.); (A.V.B.); (L.M.D.)
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Transcript profiling reveals the role of PDB1, a subunit of the pyruvate dehydrogenase complex, in Candida albicans biofilm formation. Res Microbiol 2023; 174:104014. [PMID: 36535619 DOI: 10.1016/j.resmic.2022.104014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Candida albicans, the most prevalent fungal pathogen in the human microbiota can form biofilms on implanted medical devices. These biofilms are tolerant to conventional antifungal drugs and the host immune system as compared to the free-floating planktonic cells. Several in vitro models of biofilm formation have been used to determine the C. albicans biofilm-forming process, regulatory networks, and their properties. Here, we performed a genome-wide transcript profiling with C. albicans cells grown in YPD medium both in planktonic and biofilm condition. Transcript profiling of YPD-grown biofilms was further compared with published Spider medium-grown biofilm transcriptome data. This comparative analysis highlighted the differentially expressed genes and the pathways altered during biofilm formation. In addition, we demonstrated that overexpression of the PDB1 gene encoding a subunit of the pyruvate dehydrogenase resulted in defective biofilm formation. Altogether, this comparative analysis of transcript profiles from two different studies provides a robust reading on biofilm-altered genes and pathways during C. albicans biofilm development.
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Mukherjee M, Poddar S, Mukherjee A, Bathia JN. Covid-period-associated changes in organism profile of neonatal sepsis in a tertiary center from East India. J Trop Pediatr 2022; 69:6965016. [PMID: 36579931 DOI: 10.1093/tropej/fmac106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Neonatal sepsis is a major cause of morbidity and mortality with a higher burden from the low- and middle-income countries. The coronavirus disease 2019 (Covid 19) pandemic has impacted healthcare in various ways including healthcare-associated infections (HAI). The objective of the present study was to determine changes in organism profile and incidence rates of HAI in neonates admitted to the index hospital during the pandemic and compared it with the data from the pre-pandemic period. MATERIALS AND METHODS The study design was a retrospective, observational analysis of data from neonates with culture-positive sepsis, in a tertiary care children's hospital, between January 2018 and December 2021. Pre-Covid (January 2018 to December 2019) and Covid period data (January 2020 to December 2021) were analyzed for the significance of change. RESULTS The prevalence of culture-positive sepsis, in pre-Covid and Covid periods, was 19.55% [95% confidence interval (95% CI) 17.13-21.52)] and 18.36% (CI 16.05-20.74), respectively. HAI rates/1000 patient days increased slightly during the Covid pandemic [7.2% (95% CI 6.98-10.08) to 9.8% (95% CI 9.78-13.67)] mainly due to an increase in fungal HAI (26% pre- vs. 41.5% Covid period). However, the proportion of Gram-negative (GN) infections fell significantly (70.5% vs. 48.6%) during the same period. In the pre-Covid period, Klebsiella followed by Burkholderia cepacia, Acinetobacter spp and Pseudomonas, were the major HAI isolates. During the Covid period, there was a decline in these isolates and Burkholderia spp was not detected. All fungal isolates were Candida species. The case fatality ratio (CFR) from HAI decreased significantly from 38% to 15.45%, mainly due to a decrease in GN HAI. CONCLUSION During Covid pandemic, there was a significant decline in GN HAI and CFR from HAI, due to improved compliance with infection control measures in the neonatal intensive care unit (NICU). At the same time, there was a rise in the fungal HAI, possibly because of a higher proportion of premature, and sick neonates with longer hospital stay and more invasive procedures. Consolidations of gains in infection control and restriction of invasive procedures could help to minimize HAI in NICUs.
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Affiliation(s)
- Mausumi Mukherjee
- Assistant Professor, Department of Paediatrics, Institute of Child Health, Kolkata 700017, India
| | - Sumon Poddar
- Associate Professor, Department of Clinical Microbiology, Institute of Child Health, Kolkata 700017, India
| | - Amrita Mukherjee
- 4th Semester UG, Department of Economics, St Stephen's College, University of Delhi, Delhi 110007, India
| | - Jigna N Bathia
- Senior Registrar, Department of Paediatrics, Institute of Child Health, Kolkata 700017, India
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Boone CHT, Gutzmann DJ, Kramer JJ, Atkin AL, Nickerson KW. Quantitative assay for farnesol and the aromatic fusel alcohols from the fungus Candida albicans. Appl Microbiol Biotechnol 2022; 106:6759-6773. [PMID: 36107213 PMCID: PMC9529689 DOI: 10.1007/s00253-022-12165-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/02/2022]
Abstract
Abstract
The dimorphic fungus Candida albicans is a commensal and opportunistic fungal pathogen of humans. It secretes at least four small lipophilic molecules, farnesol and three aromatic fusel alcohols. Farnesol has been identified as both a quorum sensing molecule (QSM) and a virulence factor. Our gas chromatography (GC)-based assay for these molecules exhibits high throughput, prevention of analyte loss by avoiding filtration and rotary evaporation, simultaneous cell lysis and analyte extraction by ethyl acetate, and the ability to compare whole cultures with their cell pellets and supernatants. Farnesol synthesis and secretion were separable phenomena and pellet:supernatant ratios for farnesol were high, up to 12:1. The assay was validated in terms of precision, specificity, ruggedness, accuracy, solution stability, detection limits (DL), quantitation limits (QL), and dynamic range. The DL for farnesol was 0.02 ng/µl (0.09 µM). Measurement quality was assessed by the relative error of the whole culture versus the sum of pellet and supernatant fractions (WPS). C. albicans strain SC5314 grown at 30 °C in complex and defined media (YPD and mRPMI) was assayed in biological triplicate 17 times over 3 days. Farnesol and the three aromatic fusel alcohols can be measured in the same assay. The levels of all four are greatly altered by the growth medium chosen. Significantly, the three fusel alcohols are synthesized during stationary phase, not during growth. They are secreted quickly without being retained in the cell pellet and may accumulate up to mM concentrations.
Key points
• Quantitative analysis of both intra- and extracellular farnesol, and aromatic fusel oils.
• High throughput, whole culture assay with simultaneous lysis and extraction.
• Farnesol secretion and synthesis are distinct and separate events.
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Cavalieri D, Valentini B, Stefanini I. Going wild: ecology and genomics are crucial to understand yeast evolution. Curr Opin Genet Dev 2022; 75:101922. [PMID: 35691146 DOI: 10.1016/j.gde.2022.101922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/29/2022] [Accepted: 05/03/2022] [Indexed: 11/03/2022]
Abstract
Improved and more accessible genome-sequencing approaches have allowed the analysis of large sets of natural yeast isolates. As a consequence, this unprecedented level of description of yeast-genome characteristics and variations in natural environments has provided crucial insights on yeast ecology and evolution. Here, we review some of the most relevant and intriguing aspects of yeast evolution pointed out, thanks to the combination of yeast ecology and genomics, and critically examine the resulting improvement of our knowledge on this field. Only integrated approaches, taking into consideration not only the characteristics of the microbe but also those of the hosting environment, will significantly move forward the exploration of yeast diversity, ecology, and evolution.
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Affiliation(s)
| | - Beatrice Valentini
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Irene Stefanini
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy.
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Rai LS, van Wijlick L, Chauvel M, d'Enfert C, Legrand M, Bachellier-Bassi S. Overexpression approaches to advance understanding of Candida albicans. Mol Microbiol 2021; 117:589-599. [PMID: 34569668 PMCID: PMC9298300 DOI: 10.1111/mmi.14818] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 12/15/2022]
Abstract
Candida albicans is an opportunistic fungal pathogen that is responsible for infections linked to high mortality. Loss‐of‐function approaches, taking advantage of gene knockouts or inducible down‐regulation, have been successfully used in this species in order to understand gene function. However, overexpression of a gene provides an alternative, powerful tool to elucidate gene function and identify novel phenotypes. Notably, overexpression can identify pathway components that might remain undetected using loss‐of‐function approaches. Several repressible or inducible promoters have been developed which allow to shut off or turn on the expression of a gene in C. albicans upon growth in the presence of a repressor or inducer. In this review, we summarize recent overexpression approaches used to study different aspects of C. albicans biology, including morphogenesis, biofilm formation, drug tolerance, and commensalism.
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Affiliation(s)
- Laxmi Shanker Rai
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, Université de Paris, INRAE, USC2019, Paris, France
| | - Lasse van Wijlick
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, Université de Paris, INRAE, USC2019, Paris, France
| | - Murielle Chauvel
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, Université de Paris, INRAE, USC2019, Paris, France
| | - Christophe d'Enfert
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, Université de Paris, INRAE, USC2019, Paris, France
| | - Mélanie Legrand
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, Université de Paris, INRAE, USC2019, Paris, France
| | - Sophie Bachellier-Bassi
- Unité Biologie et Pathogénicité Fongiques, Institut Pasteur, Université de Paris, INRAE, USC2019, Paris, France
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Naik B, Ahmed SMQ, Laha S, Das SP. Genetic Susceptibility to Fungal Infections and Links to Human Ancestry. Front Genet 2021; 12:709315. [PMID: 34490039 PMCID: PMC8417537 DOI: 10.3389/fgene.2021.709315] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/13/2021] [Indexed: 12/25/2022] Open
Abstract
Over the ages, fungi have associated with different parts of the human body and established symbiotic associations with their host. They are mostly commensal unless there are certain not so well-defined factors that trigger the conversion to a pathogenic state. Some of the factors that induce such transition can be dependent on the fungal species, environment, immunological status of the individual, and most importantly host genetics. In this review, we discuss the different aspects of how host genetics play a role in fungal infection since mutations in several genes make hosts susceptible to such infections. We evaluate how mutations modulate the key recognition between the pathogen associated molecular patterns (PAMP) and the host pattern recognition receptor (PRR) molecules. We discuss the polymorphisms in the genes of the immune system, the way it contributes toward some common fungal infections, and highlight how the immunological status of the host determines fungal recognition and cross-reactivity of some fungal antigens against human proteins that mimic them. We highlight the importance of single nucleotide polymorphisms (SNPs) that are associated with several of the receptor coding genes and discuss how it affects the signaling cascade post-infection, immune evasion, and autoimmune disorders. As part of personalized medicine, we need the application of next-generation techniques as a feasible option to incorporate an individual’s susceptibility toward invasive fungal infections based on predisposing factors. Finally, we discuss the importance of studying genomic ancestry and reveal how genetic differences between the human race are linked to variation in fungal disease susceptibility.
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Affiliation(s)
- Bharati Naik
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - Sumayyah M Q Ahmed
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - Suparna Laha
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - Shankar Prasad Das
- Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
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