1
|
Jakab Á, Csillag K, Antal K, Boczonádi I, Kovács R, Pócsi I, Emri T. Total transcriptome response for tyrosol exposure in Aspergillus nidulans. Fungal Biol 2024; 128:1664-1674. [PMID: 38575239 DOI: 10.1016/j.funbio.2024.01.003] [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: 03/21/2023] [Revised: 08/27/2023] [Accepted: 01/12/2024] [Indexed: 04/06/2024]
Abstract
Although tyrosol is a quorum-sensing molecule of Candida species, it has antifungal activity at supraphysiological concentrations. Here, we studied the effect of tyrosol on the physiology and genome-wide transcription of Aspergillus nidulans to gain insight into the background of the antifungal activity of this compound. Tyrosol efficiently reduced germination of conidia and the growth on various carbon sources at a concentration of 35 mM. The growth inhibition was fungistatic rather than fungicide on glucose and was accompanied with downregulation of 2199 genes related to e.g. mitotic cell cycle, glycolysis, nitrate and sulphate assimilation, chitin biosynthesis, and upregulation of 2250 genes involved in e.g. lipid catabolism, amino acid degradation and lactose utilization. Tyrosol treatment also upregulated genes encoding glutathione-S-transferases (GSTs), increased specific GST activities and the glutathione (GSH) content of the cells, suggesting that A. nidulans can detoxify tyrosol in a GSH-dependent manner even though this process was weak. Tyrosol did not induce oxidative stress in this species, but upregulated "response to nutrient levels", "regulation of nitrogen utilization", "carbon catabolite activation of transcription" and "autophagy" genes. Tyrosol may have disturbed the regulation and orchestration of cellular metabolism, leading to impaired use of nutrients, which resulted in growth reduction.
Collapse
Affiliation(s)
- Ágnes Jakab
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, 4032, Debrecen, Hungary; Department of Molecular Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, 4032, Debrecen, Hungary.
| | - Kinga Csillag
- Department of Molecular Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, 4032, Debrecen, Hungary
| | - Károly Antal
- Department of Zoology, Faculty of Sciences, Eszterházy Károly Catholic University, 3300, Eger, Hungary
| | - Imre Boczonádi
- Department of Molecular Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, 4032, Debrecen, Hungary
| | - Renátó Kovács
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, 4032, Debrecen, Hungary
| | - István Pócsi
- Department of Molecular Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, 4032, Debrecen, Hungary; HUN-REN-UD Fungal Stress Biology Research Group, 4032 Debrecen, Hungary
| | - Tamás Emri
- Department of Molecular Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, 4032, Debrecen, Hungary; HUN-REN-UD Fungal Stress Biology Research Group, 4032 Debrecen, Hungary
| |
Collapse
|
2
|
Nickerson KW, Gutzmann DJ, Boone CHT, Pathirana RU, Atkin AL. Physiological adventures in Candida albicans: farnesol and ubiquinones. Microbiol Mol Biol Rev 2024; 88:e0008122. [PMID: 38436263 PMCID: PMC10966945 DOI: 10.1128/mmbr.00081-22] [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] [Indexed: 03/05/2024] Open
Abstract
SUMMARYFarnesol was first identified as a quorum-sensing molecule, which blocked the yeast to hyphal transition in Candida albicans, 22 years ago. However, its interactions with Candida biology are surprisingly complex. Exogenous (secreted or supplied) farnesol can also act as a virulence factor during pathogenesis and as a fungicidal agent triggering apoptosis in other competing fungi. Farnesol synthesis is turned off both during anaerobic growth and in opaque cells. Distinctly different cellular responses are observed as exogenous farnesol levels are increased from 0.1 to 100 µM. Reported changes include altered morphology, stress response, pathogenicity, antibiotic sensitivity/resistance, and even cell lysis. Throughout, there has been a dearth of mechanisms associated with these observations, in part due to the absence of accurate measurement of intracellular farnesol levels (Fi). This obstacle has recently been overcome, and the above phenomena can now be viewed in terms of changing Fi levels and the percentage of farnesol secreted. Critically, two aspects of isoprenoid metabolism present in higher organisms are absent in C. albicans and likely in other yeasts. These are pathways for farnesol salvage (converting farnesol to farnesyl pyrophosphate) and farnesylcysteine cleavage, a necessary step in the turnover of farnesylated proteins. Together, these developments suggest a unifying model, whereby high, threshold levels of Fi regulate which target proteins are farnesylated or the extent to which they are farnesylated. Thus, we suggest that the diversity of cellular responses to farnesol reflects the diversity of the proteins that are or are not farnesylated.
Collapse
Affiliation(s)
| | - Daniel J. Gutzmann
- School of Biological Sciences, University of Nebraska, Lincoln, Nebraska, USA
| | - Cory H. T. Boone
- School of Biological Sciences, University of Nebraska, Lincoln, Nebraska, USA
| | - Ruvini U. Pathirana
- Department of Biology and Chemistry, Texas A&M International University, Laredo, Texas, USA
| | - Audrey L. Atkin
- School of Biological Sciences, University of Nebraska, Lincoln, Nebraska, USA
| |
Collapse
|
3
|
Wang D, An B, Luo H, He C, Wang Q. Roles of CgEde1 and CgMca in Development and Virulence of Colletotrichum gloeosporioides. Int J Mol Sci 2024; 25:2943. [PMID: 38474190 DOI: 10.3390/ijms25052943] [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: 02/04/2024] [Revised: 02/28/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Anthracnose, induced by Colletotrichum gloeosporioides, poses a substantial economic threat to rubber tree yields and various other tropical crops. Ede1, an endocytic scaffolding protein, plays a crucial role in endocytic site initiation and maturation in yeast. Metacaspases, sharing structural similarities with caspase family proteases, are essential for maintaining cell fitness. To enhance our understanding of the growth and virulence of C. gloeosporioides, we identified a homologue of Ede1 (CgEde1) in C. gloeosporioides. The knockout of CgEde1 led to impairments in vegetative growth, conidiation, and pathogenicity. Furthermore, we characterized a weakly interacted partner of CgEde1 and CgMca (orthologue of metacaspase). Notably, both the single mutant ΔCgMca and the double mutant ΔCgEde1/ΔCgMca exhibited severe defects in conidiation and germination. Polarity establishment and pathogenicity were also disrupted in these mutants. Moreover, a significantly insoluble protein accumulation was observed in ΔCgMca and ΔCgEde1/ΔCgMca strains. These findings elucidate the mechanism by which CgEde1 and CgMca regulates the growth and pathogenicity of C. gloeosporioides. Their regulation involves influencing conidiation, polarity establishment, and maintaining cell fitness, providing valuable insights into the intricate interplay between CgEde1 and CgMca in C. gloeosporioides.
Collapse
Affiliation(s)
- Dan Wang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
| | - Bang An
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Hongli Luo
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Chaozu He
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Qiannan Wang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| |
Collapse
|
4
|
Bienvenu AL, Ballut L, Picot S. Specifically Targeting Metacaspases of Candida: A New Therapeutic Opportunity. J Fungi (Basel) 2024; 10:90. [PMID: 38392762 PMCID: PMC10889698 DOI: 10.3390/jof10020090] [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: 12/10/2023] [Revised: 01/19/2024] [Accepted: 01/19/2024] [Indexed: 02/24/2024] Open
Abstract
The World Health Organization (WHO) recently published a list of fungal priority pathogens, including Candida albicans and C. auris. The increased level of resistance of Candida is raising concern, considering the availability of only four classes of medicine. The WHO is seeking novel agent classes with different targets and mechanisms of action. Targeting Candida metacaspases to control intrinsic cell death could provide new therapeutic opportunities for invasive candidiasis. In this review, we provide the available evidence for Candida cell death, describe Candida metacaspases, and discuss the potential of Candida metacaspases to offer a new specific target. Targeting Candida cell death has good scientific rationale given that the fungicidal activity of many marketed antifungals is mediated, among others, by cell death triggering. But none of the available antifungals are specifically activating Candida metacaspases, making this target a new therapeutic opportunity for non-susceptible isolates. It is expected that antifungals based on the activation of fungi metacaspases will have a broad spectrum of action, as metacaspases have been described in many fungi, including filamentous fungi. Considering this original mechanism of action, it could be of great interest to combine these new antifungal candidates with existing antifungals. This approach would help to avoid the development of antifungal resistance, which is especially increasing in Candida.
Collapse
Affiliation(s)
- Anne-Lise Bienvenu
- Service Pharmacie, Groupement Hospitalier Nord, Hospices Civils de Lyon, 69004 Lyon, France
- Malaria Research Unit, University Lyon, UMR 5246 CNRS-INSA-CPE-University Lyon1, 69100 Villeurbanne, France
| | - Lionel Ballut
- Molecular Microbiology and Structural Biochemistry, UMR 5086, CNRS-Université de Lyon, 69367 Lyon, France
| | - Stephane Picot
- Malaria Research Unit, University Lyon, UMR 5246 CNRS-INSA-CPE-University Lyon1, 69100 Villeurbanne, France
- Institute of Parasitology and Medical Mycology, Hôpital de la Croix-Rousse, Hospices Civils de Lyon, 69004 Lyon, France
| |
Collapse
|
5
|
Shi L, Xu S, Zhu Q, Wei Y. Chitosan-coated miconazole as an effective anti-inflammatory agent for the treatment of postoperative infections in obstetrics and vaginal yeast infection control on in vitro evaluations. Microb Pathog 2023; 184:106312. [PMID: 37652266 DOI: 10.1016/j.micpath.2023.106312] [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: 04/13/2023] [Revised: 06/07/2023] [Accepted: 08/18/2023] [Indexed: 09/02/2023]
Abstract
People with immune deficiency are at risk of developing infections caused by several bacterial and fungal species. In this work, chitosan-coated miconazole was developed by a simple sol-gel method. Miconazole is considered an effective drug to treat vaginal infection-causing bacteria and fungi. The coating of chitosan with miconazole nitrate showed the highest drug loading efficiency (62.43%) and mean particle size (2 μm). FTIR spectroscopic analysis confirmed the entrapment of miconazole nitrate into chitosan polymer. The antifungal result demonstrated that MN@CS microgel possessed notable anti-Aspergillus fumigatus and Candida albicans activity in lower doses. Antibacterial activity results revealed excellent bacterial growth inhibition of MN@CS microgel towards human skin infectious pathogens Escherichia coli and Staphylococcus aureus. The biocompatibility studies of In vitro cell viability and Artemia salina lethality assay suggested that MN@CS microgel is more biosafe and suitable for human external applications. In the future, it will be an efficient anti-inflammatory agent for the treatment of vaginal infections.
Collapse
Affiliation(s)
- Lixia Shi
- Department of Obstetrics, JiNan Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, PR China
| | - Shan Xu
- Department of Obstetrics, JiNan Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, PR China
| | - Qing Zhu
- Department of Obstetrics, JiNan Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, PR China
| | - Yongqing Wei
- Department of Obstetrics, JiNan Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, PR China.
| |
Collapse
|
6
|
Liang C, Xi-Xi X, Yun-Xiang S, Qiu-Hua X, Yang-Yong L, Yuan-Sen H, Ke B. Surfactin inhibits Fusarium graminearum by accumulating intracellular ROS and inducing apoptosis mechanisms. World J Microbiol Biotechnol 2023; 39:340. [PMID: 37821760 DOI: 10.1007/s11274-023-03790-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 10/04/2023] [Indexed: 10/13/2023]
Abstract
Fusarium graminearum, a devastating fungal pathogen, is the main pathogen of Fusarium head blight (FHB) in wheat globally; it results in significant yield loss and mycotoxin contamination that severely threatens global wheat production and food safety. However, despite ongoing efforts, controlling this pathogen still remains a major challenge. Surfactin, primarily synthesized by Bacillus sp. via non-ribosomal peptide synthetases, exhibits potent surfactant and antibacterial properties, but its antifungal mechanism has yet to be fully elucidated. We found that the EC50 of surfactin against hyphal growth of F. graminearum was 102.1 µg/mL, and control efficacy against wheat FHB under field conditions achieved 86.38% in wheat cultivar Huaimai 40 and 81.60% in wheat cultivar Zhoumai 36, indicating that surfactin has potential antifungal activity against F. graminearum. Accumulated intracellular ROS, decreased mitochondrial membrane potential (MMP), activated metacaspase activity and condensed chromatin, were induced by surfactin in F. graminearum hyphae, suggesting that growth inhibition of fungus is mainly caused by apoptosis-like cell death. Furthermore, accumulated intracellular ROS was evidenced to act as a key mediator of surfactin-induced apoptosis. Broad-spectrum caspase inhibitor Z-VAD-FMK treatment indicated that surfactin induces caspase-independent apoptosis in F. graminearum. Collectively, this study provides evidence that surfactin induces a ROS-mediated mitochondrial apoptosis in F. graminearum hyphae, and may exert its antifungal activity against F. graminearum by activating apoptosis. This study demonstrates the potential of surfactin as an antifungal agent for FHB biocontrol, provides a new perspective on the antifungal mechanism of surfactin against filamentous fungi, and contributes to the application of surfactin-producing microbes in the biocontrol of plant diseases.
Collapse
Affiliation(s)
- Chen Liang
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China.
| | - Xu Xi-Xi
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Sun Yun-Xiang
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Xin Qiu-Hua
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Lv Yang-Yong
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Hu Yuan-Sen
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Bian Ke
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| |
Collapse
|
7
|
Gutzmann DJ, Kramer JJ, Toomey BM, Boone CHT, Atkin AL, Nickerson KW. Transcriptional regulation of the synthesis and secretion of farnesol in the fungus Candida albicans: examination of the Homann transcription regulator knockout collection. G3 (BETHESDA, MD.) 2023; 13:jkad172. [PMID: 37522561 PMCID: PMC10542173 DOI: 10.1093/g3journal/jkad172] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 07/18/2023] [Accepted: 07/21/2023] [Indexed: 08/01/2023]
Abstract
Candida albicans is an efficient colonizer of human gastrointestinal tracts and skin and is an opportunistic pathogen. C. albicans exhibits morphological plasticity, and the ability to switch between yeast and filamentous morphologies is associated with virulence. One regulator of this switch is the quorum sensing molecule farnesol that is produced by C. albicans throughout growth. However, the synthesis, secretion, regulation, and turnover of farnesol are not fully understood. To address this, we used our improved farnesol assay to screen a transcription regulator knockout library for differences in farnesol accumulation in whole cultures, pellets, and supernatants. All screened mutants produced farnesol and they averaged 9.2× more farnesol in the pellet than the supernatant. Nineteen mutants had significant differences with ten mutants producing more farnesol than their SN152+ wild-type control strain while nine produced less. Seven mutants exhibited greater secretion of farnesol while two exhibited less. We examined the time course for farnesol accumulation in six mutants with the greatest accumulation differences and found that those differences persisted throughout growth and they were not time dependent. Significantly, two high-accumulating mutants did not exhibit the decay in farnesol levels during stationary phase characteristic of wild-type C. albicans, suggesting that a farnesol modification/degradation mechanism is absent in these mutants. Identifying these transcriptional regulators provides new insight into farnesol's physiological functions regarding cell cycle progression, white-opaque switching, yeast-mycelial dimorphism, and response to cellular stress.
Collapse
Affiliation(s)
- Daniel J Gutzmann
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
| | - Jaxon J Kramer
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
| | - Brigid M Toomey
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
| | - Cory H T Boone
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
| | - Audrey L Atkin
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
| | - Kenneth W Nickerson
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
| |
Collapse
|
8
|
Nikoomanesh F, Falahatinejad M, Černáková L, Dos Santos ALS, Mohammadi SR, Rafiee M, Rodrigues CF, Roudbary M. Combination of Farnesol with Common Antifungal Drugs: Inhibitory Effect against Candida Species Isolated from Women with RVVC. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59040743. [PMID: 37109701 PMCID: PMC10143126 DOI: 10.3390/medicina59040743] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/29/2023] [Accepted: 03/31/2023] [Indexed: 04/29/2023]
Abstract
Background and Objectives: Vulvovaginal candidiasis (VVC) is a mucous membrane infection, with an increased rate of antifungal resistance of Candida species. In this study, the in vitro efficacy of farnesol alone or in combination with traditional antifungals was assessed against resistant Candida strains recovered from women with VVC. Materials and Methods: Eighty Candida isolates were identified by multiplex polymerase chain reaction (PCR), and the antifungal susceptibility to amphotericin B (AMB), fluconazole (FLU), itraconazole (ITZ), voriconazole (VOR), clotrimazole (CTZ), and farnesol was tested by the standard microdilution method. The combinations of farnesol with each antifungal were calculated based on the fractional inhibitory concentration index (FICI). Result: Candida glabrata was the predominant species (48.75%) isolated from vaginal discharges, followed by C. albicans (43.75%), C. parapsilosis (3.75%), a mixed infection of C. albicans and C. glabrata (2.5%) and C. albicans and C. parapsilosis (1%). C. albicans and C. glabrata isolates had lower susceptibility to FLU (31.4% and 23.0%, respectively) and CTZ (37.1% and 33.3%, respectively). Importantly, there was "synergism" between farnesol-FLU and farnesol-ITZ against C. albicans and C. parapsilosis (FICI = 0.5 and 0.35, respectively), reverting the original azole-resistant profile. Conclusion: These findings indicate that farnesol can revert the resistance profile of azole by enhancing the activity of FLU and ITZ in resistant Candida isolates, which is a clinically promising result.
Collapse
Affiliation(s)
- Fatemeh Nikoomanesh
- Infectious Disease Research Center, Birjand University of Medical Sciences, Birjand 9717853577, Iran
| | - Mahsa Falahatinejad
- Department of Medical Mycology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 14115111, Iran
| | - Lucia Černáková
- Department of Microbiology and Virology, Faculty of Natural Sciences, Comenius University in Bratislava, 842 15 Bratislava, Slovakia
| | - André Luis Souza Dos Santos
- Department of General Microbiology, Microbiology Institute Paulo de Góes, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro 21941-901, RJ, Brazil
| | - Shahla Roudbar Mohammadi
- Department of Medical Mycology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 14115111, Iran
| | - Mitra Rafiee
- Department of Immunology, School of Medicine, Cellular and Molecular Research Center, Birjand University of Medical Sciences, Birjand 9717853577, Iran
| | - Célia Fortuna Rodrigues
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal
- TOXRUN-Toxicology Research Unit, Cooperativa de Ensino Superior Politécnico e Universitário-CESPU, 4585-116 Gandra PRD, Portugal
| | - Maryam Roudbary
- Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran 1449614535, Iran
| |
Collapse
|
9
|
Impact of Volatile Organic Compounds on the Growth of Aspergillus flavus and Related Aflatoxin B1 Production: A Review. Int J Mol Sci 2022; 23:ijms232415557. [PMID: 36555197 PMCID: PMC9779742 DOI: 10.3390/ijms232415557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022] Open
Abstract
Volatile organic compounds (VOCs) are secondary metabolites of varied chemical nature that are emitted by living beings and participate in their interactions. In addition, some VOCs called bioactive VOCs cause changes in the metabolism of other living species that share the same environment. In recent years, knowledge on VOCs emitted by Aspergillus flavus, the main species producing aflatoxin B1 (AFB1), a highly harmful mycotoxin, has increased. This review presents an overview of all VOCs identified as a result of A. flavus toxigenic (AFB1-producing) and non-toxigenic (non AFB1-producing) strains growth on different substrates, and the factors influencing their emissions. We also included all bioactive VOCs, mixes of VOCs or volatolomes of microbial species that impact A. flavus growth and/or related AFB1 production. The modes of action of VOCs impacting the fungus development are presented. Finally, the potential applications of VOCs as biocontrol agents in the context of mycotoxin control are discussed.
Collapse
|
10
|
Oiki S, Nasuno R, Urayama SI, Takagi H, Hagiwara D. Intracellular production of reactive oxygen species and a DAF-FM-related compound in Aspergillus fumigatus in response to antifungal agent exposure. Sci Rep 2022; 12:13516. [PMID: 35933435 PMCID: PMC9357077 DOI: 10.1038/s41598-022-17462-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 07/26/2022] [Indexed: 11/09/2022] Open
Abstract
Fungi are ubiquitously present in our living environment and are responsible for crop and infectious diseases. Developing new antifungal agents is constantly needed for their effective control. Here, we investigated fungal cellular responses to an array of antifungal compounds, including plant- and bacteria-derived antifungal compounds. The pathogenic fungus Aspergillus fumigatus generated reactive oxygen species in its hyphae after exposure to the antifungal compounds thymol, farnesol, citral, nerol, salicylic acid, phenazine-1-carbonic acid, and pyocyanin, as well as under oxidative and high-temperature stress conditions. The production of nitric oxide (NO) was determined using diaminofluorescein-FM diacetate (DAF-FM DA) and occurred in response to antifungal compounds and stress conditions. The application of reactive oxygen species or NO scavengers partly suppressed the inhibitory effects of farnesol on germination. However, NO production was not detected in the hyphae using the Greiss method. An LC/MS analysis also failed to detect DAF-FM-T, a theoretical product derived from DAF-FM DA and NO, in the hyphae after antifungal treatments. Thus, the cellular state after exposure to antifungal agents may be more complex than previously believed, and the role of NO in fungal cells needs to be investigated further.
Collapse
Affiliation(s)
- Sayoko Oiki
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.,Laboratory of Basic and Applied Molecular Biotechnology, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Ryo Nasuno
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Syun-Ichi Urayama
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.,Microbiology Research Center for Sustainability, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Hiroshi Takagi
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Daisuke Hagiwara
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan. .,Microbiology Research Center for Sustainability, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan.
| |
Collapse
|
11
|
Brilhante RSN, Paixão GC, Pereira VS, Oliveira JSD, Maciel JM, Pereira-Neto WDA, Lima-Neto RGD, Castelo-Branco DDSCM, Cordeiro RDA, Sidrim JJC, Rocha MFG. Atypical chlamydoconidium-producing Trichophyton tonsurans strains from Ceará State, Northeast Brazil: investigation of taxonomy by phylogenetic analysis and biofilm susceptibility. MICROBIOLOGY-SGM 2021; 167. [PMID: 33427606 DOI: 10.1099/mic.0.001018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Chlamydoconidium-producing Trichophyton tonsurans strains isolated in Northeastern Brazil have morphological features different from the classic description of this dermatophyte species. This study investigated the phylogenetic relationship of chlamydoconidium-producing T. tonsurans strains isolated in Northeastern Brazil. Also, the effect of terbinafine and farnesol on mature biofilms of T. tonsurans strains was evaluated. The mass spectra of T. tonsurans strains were investigated by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS). The ITS and LSU loci regions of rDNA and the partial β-tubulin gene were sequenced and the phylogenetic tree was analysed. The effects of terbinafine and farnesol on mature T. tonsurans biofilms were evaluated through the analysis of metabolic activity, quantification of biomass and observation by scanning electron microscopy. MALDI-TOF MS spectra of the chlamydoconidium-producing T. tonsurans strains differed from the spectrum of the control strain (ATCC 28942), presenting an intense ion peak at m/z 4155 Da. Phylogenetic tree analysis showed that the chlamydoconidium-producing strains isolated in Northeastern Brazil are allocated to a single cluster, differing from strains isolated from other countries. As for mature T. tonsurans biofilms, farnesol reduced biomass and metabolic activity by 64.4 and 65.9 %, respectively, while terbinafine reduced the biomass by 66.5 % and the metabolic activity by 69 %. Atypical morphological characteristics presented by chlamydoconidium-producing T. tonsurans strains result from phenotypic plasticity, possibly for adaptation to environmental stressors. Also, farnesol had inhibitory activity against T. tonsurans biofilms, demonstrating this substance can be explored for development of promising anti-biofilm drugs against dermatophytes.
Collapse
Affiliation(s)
- Raimunda Sâmia Nogueira Brilhante
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Germana Costa Paixão
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Vandbergue Santos Pereira
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Jonathas Sales de Oliveira
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Juliana Maria Maciel
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Waldemiro de Aquino Pereira-Neto
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | | | - Débora de Souza Collares Maia Castelo-Branco
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Rossana de Aguiar Cordeiro
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - José Júlio Costa Sidrim
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| | - Marcos Fábio Gadelha Rocha
- Postgraduate Program in Veterinary Sciences, College of Veterinary, State University of Ceará. Av. Dr. Silas Munguba, 1700, Campus do Itaperi, CEP: 60714-903, Fortaleza, Ceará, Brazil.,Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP: 60430-275, Fortaleza, Ceará, Brazil
| |
Collapse
|
12
|
Roudbary M, Vahedi-Shahandashti R, Santos ALSD, Roudbar Mohammadi S, Aslani P, Lass-Flörl C, Rodrigues CF. Biofilm formation in clinically relevant filamentous fungi: a therapeutic challenge. Crit Rev Microbiol 2021; 48:197-221. [PMID: 34358430 DOI: 10.1080/1040841x.2021.1950121] [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] [Indexed: 02/08/2023]
Abstract
Biofilms are highly-organized microbial communities attached to a biotic or an abiotic surface, surrounded by an extracellular matrix secreted by the biofilm-forming cells. The majority of fungal pathogens contribute to biofilm formation within tissues or biomedical devices, leading to serious and persistent infections. The clinical significance of biofilms relies on the increased resistance to conventional antifungal therapies and suppression of the host immune system, which leads to invasive and recurrent fungal infections. While different features of yeast biofilms are well-described in the literature, the structural and molecular basis of biofilm formation of clinically related filamentous fungi has not been fully addressed. This review aimed to address biofilm formation in clinically relevant filamentous fungi.
Collapse
Affiliation(s)
- Maryam Roudbary
- Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | - André Luis Souza Dos Santos
- Department of General Microbiology, Microbiology Institute Paulo de Góes, Federal University of Rio de Janeiro (UFRJ), Brazil
| | | | - Peyman Aslani
- Department of Parasitology and Mycology, Faculty of Medicine, Aja University of Medical Sciences, Tehran, Iran
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University Innsbruck, Innsbruck, Austria
| | - Célia F Rodrigues
- LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal
| |
Collapse
|
13
|
Abstract
Quorum sensing (QS) is one of the most studied cell-cell communication mechanisms in fungi. Research in the last 20 years has explored various fungal QS systems that are involved in a wide range of biological processes, especially eukaryote- or fungus-specific behaviors, mirroring the significant contribution of QS regulation to fungal biology and evolution. Based on recent progress, we summarize in this review fungal QS regulation, with an emphasis on its functional role in behaviors unique to fungi or eukaryotes. We suggest that using fungi as genetically amenable eukaryotic model systems to address why and how QS regulation is integrated into eukaryotic reproductive strategies and molecular or cellular processes could be an important direction for QS research. Expected final online publication date for the Annual Review of Microbiology, Volume 75 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
Collapse
Affiliation(s)
- Xiuyun Tian
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; .,University of Chinese Academy of Sciences, Beijing 100039, China
| | - Hao Ding
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; .,University of Chinese Academy of Sciences, Beijing 100039, China
| | - Weixin Ke
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; .,University of Chinese Academy of Sciences, Beijing 100039, China
| | - Linqi Wang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; .,University of Chinese Academy of Sciences, Beijing 100039, China
| |
Collapse
|
14
|
Onder S, Oz Y. In Vitro Effects of Farnesol Alone and in Combination with Antifungal Drugs Against Aspergillus Clinical Isolates. Med Mycol J 2021; 62:5-10. [PMID: 33642525 DOI: 10.3314/mmj.20-00016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Farnesol is an extracellular quorum-sensing molecule produced by Candida albicans. Farnesol is also a sesquiterpene alcohol existing in many herbal products and has various activity against fungal cells. We aimed to investigate the efficacy of farnesol alone and the contribution of farnesol on the activity of voriconazole and amphotericin B against Aspergillus clinical isolates in vitro. A total of 45 Aspergillus clinical isolates were used in this study. The MIC values of voriconazole, amphotericin B, and farnesol were determined using reference broth microdilution method. The interactions of farnesol with voriconazole and amphotericin B were investigated by the checkerboard method and evaluated based on the fractional inhibitor concentration index (FICI). The MIC ranges of farnesol, voriconazole, and amphotericin B were 1,500-6,000 μM, 0.125-1 μg/mL, and 0.125-0.5 μg/mL against Aspergillus fumigatus isolates, 3,000-12,000 μM, 0.125-0.5 μg/mL, and 0.25-2 μg/mL against Aspergillus flavus isolates, respectively. The most common interaction in combination tests was "no interaction," and synergistic interaction was not detected. The combinations of farnesol with voriconazole and amphotericin B had antagonistic activity against 38% and 27% of all isolates, respectively.We concluded that the responses of different fungal species against farnesol are variable, and different interactions may be observed when it is combined with different antifungals. Therefore, it should be noted that farnesol may have an adverse effect on some fungi or interact negatively with antifungals used in combination.
Collapse
Affiliation(s)
- Sukran Onder
- Eskisehir Osmangazi University Medical Faculty, Department of Microbiology, Division of Mycology
| | - Yasemin Oz
- Eskisehir Osmangazi University Medical Faculty, Department of Microbiology, Division of Mycology
| |
Collapse
|
15
|
Role of Two Metacaspases in Development and Pathogenicity of the Rice Blast Fungus Magnaporthe oryzae. mBio 2021; 12:mBio.03471-20. [PMID: 33563831 PMCID: PMC7885106 DOI: 10.1128/mbio.03471-20] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Magnaporthe oryzae causes rice blast disease that threatens global food security by resulting in the severe loss of rice production every year. A tightly regulated life cycle allows M. oryzae to disarm the host plant immune system during its biotrophic stage before triggering plant cell death in its necrotrophic stage. Rice blast disease caused by Magnaporthe oryzae is a devastating disease of cultivated rice worldwide. Infections by this fungus lead to a significant reduction in rice yields and threats to food security. To gain better insight into growth and cell death in M. oryzae during infection, we characterized two predicted M. oryzae metacaspase proteins, MoMca1 and MoMca2. These proteins appear to be functionally redundant and can complement the yeast Yca1 homologue. Biochemical analysis revealed that M. oryzae metacaspases exhibited Ca2+-dependent caspase activity in vitro. Deletion of both MoMca1 and MoMca2 in M. oryzae resulted in reduced sporulation, delay in conidial germination, and attenuation of disease severity. In addition, the double ΔMomca1mca2 mutant strain showed increased radial growth in the presence of oxidative stress. Interestingly, the ΔMomca1mca2 strain showed an increased accumulation of insoluble aggregates compared to the wild-type strain during vegetative growth. Our findings suggest that MoMca1 and MoMca2 promote the clearance of insoluble aggregates in M. oryzae, demonstrating the important role these metacaspases have in fungal protein homeostasis. Furthermore, these metacaspase proteins may play additional roles, like in regulating stress responses, that would help maintain the fitness of fungal cells required for host infection.
Collapse
|
16
|
Brilhante RSN, Pereira VS, Nobre AFD, Oliveira JSD, Fernandes MR, Costa ADC, Rodrigues AM, Camargo ZPD, Pereira-Neto WA, Sidrim JJC, Rocha MFG. Exogenous fungal quorum sensing molecules inhibit planktonic cell growth and modulate filamentation and biofilm formation in the Sporothrix schenckii complex. BIOFOULING 2020; 36:909-921. [PMID: 33059473 DOI: 10.1080/08927014.2020.1828373] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 09/17/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
This study investigated the effect of the quorum sensing molecules (QSMs) farnesol, 2-phenylehtanol, tyrosol and tryptophol against planktonic cells, filamentation and biofilms of Sporothrix spp. The antifungal activity of QSMs was evaluated by broth microdilution. QSMs showed MICs in the ranges of 0.01-1 µM (farnesol), 1-8 mM (2-phenylehtanol and tyrosol), and >16 mM (tryptophol). Filamentous biofilm formation was inhibited by farnesol and 2-phenylehtanol and stimulated by tyrosol. Yeast biofilm formation was inhibited by 2-phenylehtanol and tyrosol. Tryptophol did not affect Sporothrix biofilm formation. QSMs showed MICs against mature biofilms of 8-32 µM (farnesol), 8-32 mM (2-phenylehtanol) and 64-128 mM (tyrosol). In conclusion, farnesol, 2-phenylethanol and tyrosol have antifungal activity against planktonic and sessile cells and modulate filamentation and biofilm formation in Sporothrix spp.
Collapse
Affiliation(s)
- Raimunda Sâmia Nogueira Brilhante
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Vandbergue Santos Pereira
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Augusto Feynman Dias Nobre
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Jonathas Sales de Oliveira
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Mirele Rodrigues Fernandes
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Anderson da Cunha Costa
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Anderson Messias Rodrigues
- Cellular Biology Division, Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo. Rua Botucatu, São Paulo, Brazil
| | - Zoilo Pires de Camargo
- Cellular Biology Division, Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo. Rua Botucatu, São Paulo, Brazil
| | - Waldemiro Aquino Pereira-Neto
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - José Júlio Costa Sidrim
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
| | - Marcos Fábio Gadelha Rocha
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará. Rua Cel. Nunes de Melo, Fortaleza, Brazil
- Postgraduate Program in Veterinary Sciences, College of Veterinary, State University of Ceará, Fortaleza, Brazil
| |
Collapse
|
17
|
Kovács R, Majoros L. Fungal Quorum-Sensing Molecules: A Review of Their Antifungal Effect against Candida Biofilms. J Fungi (Basel) 2020; 6:jof6030099. [PMID: 32630687 PMCID: PMC7559060 DOI: 10.3390/jof6030099] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 06/28/2020] [Accepted: 06/30/2020] [Indexed: 01/05/2023] Open
Abstract
The number of effective therapeutic strategies against biofilms is limited; development of novel therapies is urgently needed to treat a variety of biofilm-associated infections. Quorum sensing is a special form of microbial cell-to-cell communication that is responsible for the release of numerous extracellular molecules, whose concentration is proportional with cell density. Candida-secreted quorum-sensing molecules (i.e., farnesol and tyrosol) have a pivotal role in morphogenesis, biofilm formation, and virulence. Farnesol can mediate the hyphae-to-yeast transition, while tyrosol has the opposite effect of inducing transition from the yeast to hyphal form. A number of questions regarding Candida quorum sensing remain to be addressed; nevertheless, the literature shows that farnesol and tyrosol possess remarkable antifungal and anti-biofilm effect at supraphysiological concentration. Furthermore, previous in vitro and in vivo data suggest that they may have a potent adjuvant effect in combination with certain traditional antifungal agents. This review discusses the most promising farnesol- and tyrosol-based in vitro and in vivo results, which may be a foundation for future development of novel therapeutic strategies to combat Candida biofilms.
Collapse
Affiliation(s)
- Renátó Kovács
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
- Faculty of Pharmacy, University of Debrecen, 4032 Debrecen, Hungary
- Correspondence: ; Tel.: +0036-52-255-425; Fax: +0036-52-255-424
| | - László Majoros
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
| |
Collapse
|
18
|
Abstract
Farnesol is a natural sesquiterpenoid and an interesting quorum-sensing molecule. Its insolubility in water is the biggest obstacle to its application for bacterial biofilm treatments since it compromises the bioavailability. Recently, an increasing interest in farnesol encapsulation or loading in polymeric materials may be noted due to the prolonged action of the active macromolecular systems. In this short review, we present an overview of methods leading to improved interactions between farnesol and microbial biofilms.
Collapse
|
19
|
Delmondes GDA, Santiago Lemos IC, Dias DDQ, Cunha GLD, Araújo IM, Barbosa R, Coutinho HDM, Felipe CFB, Barbosa-Filho JM, Lima NTRD, De Menezes IRA, Kerntopf MR. Pharmacological applications of farnesol (C15H26O): a patent review. Expert Opin Ther Pat 2020; 30:227-234. [DOI: 10.1080/13543776.2020.1718653] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | | | | | | | - Isaac Moura Araújo
- Department of Biologial Chemistry, Regional University of Cariri (URCA), Crato, CE, Brazil
| | - Roseli Barbosa
- Department of Biologial Chemistry, Regional University of Cariri (URCA), Crato, CE, Brazil
| | | | | | | | | | | | - Marta Regina Kerntopf
- Department of Biologial Chemistry, Regional University of Cariri (URCA), Crato, CE, Brazil
| |
Collapse
|
20
|
Kischkel B, Souza GK, Chiavelli LUR, Pomini AM, Svidzinski TIE, Negri M. The ability of farnesol to prevent adhesion and disrupt Fusarium keratoplasticum biofilm. Appl Microbiol Biotechnol 2019; 104:377-389. [PMID: 31768611 DOI: 10.1007/s00253-019-10233-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 10/22/2019] [Accepted: 10/31/2019] [Indexed: 01/26/2023]
Abstract
A biofilm is represented by a community of microorganisms capable of adhering to a surface and producing substances that envelop the cells, forming an extracellular matrix. The extracellular matrix is responsible for protecting microorganisms against environmental stress, hosts the immune system and confers resistance to antimicrobials. Fusarium keratoplasticum is a common species of FSSC (Fusarium solani species complex) associated with human infections, being the most prevalent species related to biofilm formation in hospital water systems and internal pipelines. With this in mind, this study aimed to characterise the biofilm formed by the fungus F. keratoplasticum and to evaluate the effects of farnesol, a fungal quorum sensing (QS) molecule, on the preformed biofilm and also during its formation at different times (adhesion and 24, 48 and 72 h). F. keratoplasticum is able to adhere to an abiotic surface and form a dense biofilm in 72 h, with increased total biomass and matrix modulation with the presence of extracellular DNA, RNA, polysaccharides and proteins. Farnesol exhibited important anti-biofilm activity, causing the destruction of hyphae and the extracellular matrix in preformed biofilm and preventing the adhesion of conidia, filamentation and the formation of biofilm. Few studies have characterised the formation of biofilm by filamentous fungi. Our findings suggest that farnesol acts efficiently on F. keratoplasticum biofilm since this molecule is capable of breaking the extracellular matrix, thereby disarranging the biofilm.
Collapse
Affiliation(s)
- Brenda Kischkel
- Clinical Analysis Department, State University of Maringá, Avenue Colombo, 5790, Maringá, PR, 87020-900, Brazil
| | - Gredson Keiff Souza
- Department of Chemistry, State University of Maringá, Avenue Colombo, 5790, Maringá, PR, 87020-900, Brazil
| | | | - Armando Mateus Pomini
- Department of Chemistry, State University of Maringá, Avenue Colombo, 5790, Maringá, PR, 87020-900, Brazil
| | | | - Melyssa Negri
- Clinical Analysis Department, State University of Maringá, Avenue Colombo, 5790, Maringá, PR, 87020-900, Brazil.
| |
Collapse
|
21
|
de Araújo Delmondes G, Bezerra DS, de Queiroz Dias D, de Souza Borges A, Araújo IM, Lins da Cunha G, Bandeira PFR, Barbosa R, Melo Coutinho HD, Felipe CFB, Barbosa-Filho JM, Alencar de Menezes IR, Kerntopf MR. Toxicological and pharmacologic effects of farnesol (C15H26O): A descriptive systematic review. Food Chem Toxicol 2019; 129:169-200. [DOI: 10.1016/j.fct.2019.04.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 04/02/2019] [Accepted: 04/22/2019] [Indexed: 12/22/2022]
|
22
|
Mehmood A, Liu G, Wang X, Meng G, Wang C, Liu Y. Fungal Quorum-Sensing Molecules and Inhibitors with Potential Antifungal Activity: A Review. Molecules 2019; 24:E1950. [PMID: 31117232 PMCID: PMC6571750 DOI: 10.3390/molecules24101950] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 12/16/2022] Open
Abstract
The theory of persisting independent and isolated regarding microorganisms is no longer accepted. To survive and reproduce they have developed several communication platforms within the cells which facilitates them to adapt the surrounding environmental changes. This cell-to-cell communication is termed as quorum sensing; it relies upon the cell density and can stimulate several traits of microbes including biofilm formation, competence, and virulence factors secretion. Initially, this sophisticated mode of communication was discovered in bacteria; later, it was also confirmed in eukaryotes (fungi). As a consequence, many quorum-sensing molecules and inhibitors have been identified and characterized in various fungal species. In this review article, we will primarily focus on fungal quorum-sensing molecules and the production of inhibitors from fungal species with potential applications for combating fungal infections.
Collapse
Affiliation(s)
- Arshad Mehmood
- Beijing Advance Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing 100048, China.
| | - Guorong Liu
- Beijing Advance Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing 100048, China.
| | - Xin Wang
- Beijing Advance Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing 100048, China.
| | - Guannan Meng
- Beijing Advance Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing 100048, China.
| | - Chengtao Wang
- Beijing Advance Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), Beijing 100048, China.
| | - Ya Liu
- R&D Center of China Tobacco Yunnan Industrial Co. Ltd., Kunming 650202, China.
| |
Collapse
|
23
|
Li XM, Li ZY, Wang YD, Wang JQ, Yang PL. Quercetin Inhibits the Proliferation and Aflatoxins Biosynthesis of Aspergillus flavus. Toxins (Basel) 2019; 11:toxins11030154. [PMID: 30857280 PMCID: PMC6468572 DOI: 10.3390/toxins11030154] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/03/2019] [Accepted: 03/05/2019] [Indexed: 01/10/2023] Open
Abstract
In this work of quercetin’s anti-proliferation action on A. flavus, we revealed that quercetin can effectively hamper the proliferation of A. flavus in dose-effect and time-effect relationships. We tested whether quercetin induced apoptosis in A. flavus via various detection methods, such as phosphatidylserine externalization and Hoechst 33342 staining. The results showed that quercetin had no effect on phosphatidylserine externalization and cell nucleus in A. flavus. Simultaneously, quercetin reduced the levels of reactive oxygen species (ROS). For a better understanding of the molecular mechanism of the A. flavus response to quercetin, the RNA-Seq was used to explore the transcriptomic profiles of A. flavus. According to transcriptome sequencing data, quercetin inhibits the proliferation and aflatoxin biosynthesis by regulating the expression of development-related genes and aflatoxin production-related genes. These results will provide some theoretical basis for quercetin as an anti-mildew agent resource.
Collapse
Affiliation(s)
- Xiu-Mei Li
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
- National Engineering Research Center of Biological Feed, Beijing 100081, China.
| | - Zhong-Yuan Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education & Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Ya-Dong Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education & Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Jin-Quan Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Pei-Long Yang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
- National Engineering Research Center of Biological Feed, Beijing 100081, China.
| |
Collapse
|
24
|
Cordeiro RDA, Pereira LMG, de Sousa JK, Serpa R, Andrade ARC, Portela FVM, Evangelista AJDJ, Sales JA, Aguiar ALR, Mendes PBL, Brilhante RSN, Sidrim JJDC, Castelo-Branco DDSCM, Rocha MFG. Farnesol inhibits planktonic cells and antifungal-tolerant biofilms of Trichosporon asahii and Trichosporon inkin. Med Mycol 2019; 57:1038-1045. [DOI: 10.1093/mmy/myy160] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/20/2018] [Accepted: 12/21/2018] [Indexed: 12/30/2022] Open
Abstract
Abstract
Trichosporon species have been considered important agents of opportunistic systemic infections, mainly among immunocompromised patients. Infections by Trichosporon spp. are generally associated with biofilm formation in invasive medical devices. These communities are resistant to therapeutic antifungals, and therefore the search for anti-biofilm molecules is necessary. This study evaluated the inhibitory effect of farnesol against planktonic and sessile cells of clinical Trichosporon asahii (n = 3) andTrichosporon inkin (n = 7) strains. Biofilms were evaluated during adhesion, development stages and after maturation for metabolic activity, biomass and protease activity, as well as regarding morphology and ultrastructure by optical microscopy, confocal laser scanning microscopy, and scanning electron microscopy. Farnesol inhibited Trichosporon planktonic growth by 80% at concentrations ranging from 600 to 1200 μM for T. asahii and from 75 to 600 μM for T. inkin. Farnesol was able to reduce cell adhesion by 80% at 300 μM for T. asahii and T. inkin at 600 μM, while biofilm development of both species was inhibited by 80% at concentration of 150 μM, altering their structure. After biofilm maturation, farnesol decreased T. asahii biofilm formation by 50% at 600 μM concentration and T. inkin formation at 300 μM. Farnesol inhibited gradual filamentation in a concentration range between 600 and 1200 μM. Farnesol caused reduction of filament structures of Trichosporon spp. at every stage of biofilm development analyzed. These data show the potential of farnesol as an anti-biofilm molecule.
Collapse
Affiliation(s)
- Rossana de Aguiar Cordeiro
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
- Faculty of Medicine, Post Graduate Program in Medical Sciences, Federal University of Ceará, Brazil
| | | | - José Kleybson de Sousa
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
| | - Rosana Serpa
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
| | | | | | | | - Jamille Alencar Sales
- Faculty of Veterinary Medicine, Post Graduate Program in Veterinary Science, State University of Ceará, Brazil
| | - Ana Luiza Ribeiro Aguiar
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
| | | | - Raimunda Sâmia Nogueira Brilhante
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
- Faculty of Medicine, Post Graduate Program in Medical Sciences, Federal University of Ceará, Brazil
| | - José Júlio da Costa Sidrim
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
- Faculty of Medicine, Post Graduate Program in Medical Sciences, Federal University of Ceará, Brazil
| | | | - Marcos Fabio Gadelha Rocha
- Faculty of Medicine, Post Graduate Program in Medical Microbiology, Federal University of Ceará, Brazil
- Faculty of Veterinary Medicine, Post Graduate Program in Veterinary Science, State University of Ceará, Brazil
| |
Collapse
|
25
|
Leiter É, Csernoch L, Pócsi I. Programmed cell death in human pathogenic fungi - a possible therapeutic target. Expert Opin Ther Targets 2018; 22:1039-1048. [PMID: 30360667 DOI: 10.1080/14728222.2018.1541087] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Diseases caused by pathogenic fungi are increasing because of antibiotic overuse, the rise of immunosuppressive therapies, and climate change. The limited variety of antimycotics and the rapid adaptation of pathogenic fungi to antifungal agents serve to exacerbate this issue. Unfortunately, about 1.6 million people are killed by fungal infections annually. Areas covered: The discovery of the small antimicrobial proteins produced by microorganisms, animals, humans, and plants will hopefully overcome challenges in the treatment of fungal infections. These small proteins are highly stable and any resistance to them rarely evolves; therefore, they are potentially good candidates for the treatment and prevention of infections caused by pathogenic fungi. Some of these proteins target the programmed cell death machinery of pathogenic fungi; this is potentially a novel approach in antimycotic therapies. In this review, we highlight the elements of apoptosis in human pathogenic fungi and related model organisms and discuss the possible therapeutic potential of the apoptosis-inducing, small, antifungal proteins. Expert opinion: Small antimicrobial proteins may establish a new class of antimycotics in the future. The rarity of resistance and their synergistic effects with other frequently used antifungal agents may help pave the way for their use in the clinic.
Collapse
Affiliation(s)
- Éva Leiter
- a Department of Biotechnology and Microbiology , University of Debrecen , Debrecen , Hungary
| | - László Csernoch
- b Department of Physiology , University of Debrecen , Debrecen , Hungary
| | - István Pócsi
- a Department of Biotechnology and Microbiology , University of Debrecen , Debrecen , Hungary
| |
Collapse
|
26
|
Shlezinger N, Irmer H, Dhingra S, Beattie SR, Cramer RA, Braus GH, Sharon A, Hohl TM. Response to Comment on "Sterilizing immunity in the lung relies on targeting fungal apoptosis-like programmed cell death". Science 2018; 360:360/6395/eaas9457. [PMID: 29930111 DOI: 10.1126/science.aas9457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 05/10/2018] [Indexed: 12/22/2022]
Abstract
Aouacheria et al question the interpretation of contemporary assays to monitor programmed cell death with apoptosis-like features (A-PCD) in Aspergillus fumigatus Although our study focuses on fungal A-PCD for host immune surveillance and infectious outcomes, the experimental approach incorporates multiple independent A-PCD markers and genetic manipulations based on fungal rather than mammalian orthologs to circumvent the limitations associated with any single approach.
Collapse
Affiliation(s)
- Neta Shlezinger
- Infectious Disease Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10075, USA
| | - Henriette Irmer
- Department of Molecular Microbiology and Genetics, Institute for Microbiology and Genetics, and Göttingen Center for Molecular Biosciences, University of Göttingen, D-37077 Göttingen, Germany
| | - Sourabh Dhingra
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - Sarah R Beattie
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - Robert A Cramer
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
| | - Gerhard H Braus
- Department of Molecular Microbiology and Genetics, Institute for Microbiology and Genetics, and Göttingen Center for Molecular Biosciences, University of Göttingen, D-37077 Göttingen, Germany
| | - Amir Sharon
- Department of Molecular Biology and Ecology of Plants, Tel Aviv University, Tel Aviv 69978, Israel.
| | - Tobias M Hohl
- Infectious Disease Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10075, USA. .,Immunology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10075, USA
| |
Collapse
|
27
|
Tian J, Gan Y, Pan C, Zhang M, Wang X, Tang X, Peng X. Nerol-induced apoptosis associated with the generation of ROS and Ca 2+ overload in saprotrophic fungus Aspergillus flavus. Appl Microbiol Biotechnol 2018; 102:6659-6672. [PMID: 29860589 DOI: 10.1007/s00253-018-9125-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/10/2018] [Accepted: 05/12/2018] [Indexed: 12/12/2022]
Abstract
The contamination of food with Aspergillus flavus and subsequent aflatoxins is one of the most serious safety problems in the world. In this study of nerol (NEL)'s antifungal mechanism of action, we observed morphological and physiological changes in Aspergillus flavus. We found that NEL resulted in elevated levels of reactive oxygen species (ROS) and calcium ions (Ca2+). On ROS assays, compared with the controls, the proportion of fluorescent cells treated with concentrations of 0.25, 0.5, 1, and 2 μL/mL NEL increased to 8.4 ± 1.07%, 10.2 ± 1.72%, 13.4 ± 0.50%, and 26.2 ± 4.21%, respectively. Increased mitochondrial dysfunction and oxidative stress induced by the interactions between Ca2+ and ROS subsequently activate the release of cytochrome c and caspase activity. Characteristic changes of apoptosis were also observed via various detection methods, including phosphatidylserine externalization, nuclear condensation, and DNA fragmentation. Meanwhile, we found that the expression of CaMKs increased significantly in NEL-treated cells. In conclusion, our findings indicate that NEL has great potential as an eco-friendly antifungal agent for food preservation.
Collapse
Affiliation(s)
- Jun Tian
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China. .,Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, 100048, People's Republic of China. .,Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China.
| | - Yeyun Gan
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Chao Pan
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Man Zhang
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Xueyan Wang
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China
| | - Xudong Tang
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China.
| | - Xue Peng
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China.
| |
Collapse
|
28
|
Abstract
In concert with the increased understanding that there are many ways for cells to die, several methods have been developed to detect cell death. The classification of cell death posed some difficulties that were overcome by implementing strict selection criteria that should also apply to the detection methods. The selection of assays is based on morphological criteria and distinguishable marks of apoptotic patways. The detection of apoptosis includes methods related to membrane alterations, DNA fragmentation, cytotoxicity and cell proliferation, mitochondrial damage, immunological detection and mechanism based assays. Other less frequently used detections of apoptosis are: (a) light-scattering flow cytometry to avoid underestimating the extent and timing of apoptosis, (b) time-lapse microscopy perfusion platform to support the temporal aspects of detection, to measure cell surface area and cellular adhesion, and (c) genotoxicity specific chromatin changes. Attention is called to the advantages and limitations of various methods.
Collapse
Affiliation(s)
- Gaspar Banfalvi
- Department of Biotechnology and Microbiology, University of Debrecen, Debrecen,, 4010, Hungary.
| |
Collapse
|
29
|
Mukherjee D, Gupta S, Saran N, Datta R, Ghosh A. Induction of apoptosis-like cell death and clearance of stress-induced intracellular protein aggregates: dual roles for Ustilago maydis metacaspase Mca1. Mol Microbiol 2017; 106:815-831. [PMID: 28941233 DOI: 10.1111/mmi.13848] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2017] [Indexed: 01/01/2023]
Abstract
Metacaspases primarily associate with induction and execution of programmed cell death in protozoa, fungi and plants. In the recent past, several studies have also demonstrated cellular functions of metacaspases other than cell death in different organisms including yeast and protozoa. This study shows similar dual function for the only metacaspase of a biotrophic phytopathogen, Ustilago maydis. In addition to a conventional role in the induction of cell death, Mca1 has been demonstrated to play a key role in maintaining the quality of the cellular proteome. On one hand, Mca1 could be shown to bring about apoptosis-like phenotypic changes in U. maydis on exposure to oxidative stress, on the other hand, the protein was found to regulate cellular protein quality control. U. maydis metacaspase has been found to remain closely associated with the insoluble intracellular protein aggregates, generated during an event of stress exposure to the fungus. The study, therefore, provides direct evidence for a role of U. maydis metacaspase in the clearance of the stress-induced intracellular insoluble protein aggregates. Furthermore, host infection assays with mca1 deletion strain also revealed a role of the protein in the virulence of the fungus.
Collapse
Affiliation(s)
- Dibya Mukherjee
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12 C.I.T. Road, Scheme VIIM, Kolkata 700054, India
| | - Sayandeep Gupta
- Department of Biochemistry, Bose Institute, Centenary Campus, P1/12 C.I.T. Road, Scheme VIIM, Kolkata 700054, India
| | - N Saran
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12 C.I.T. Road, Scheme VIIM, Kolkata 700054, India
| | - Rahul Datta
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12 C.I.T. Road, Scheme VIIM, Kolkata 700054, India
| | - Anupama Ghosh
- Division of Plant Biology, Bose Institute, Centenary Campus, P1/12 C.I.T. Road, Scheme VIIM, Kolkata 700054, India
| |
Collapse
|
30
|
Gonçalves AP, Heller J, Daskalov A, Videira A, Glass NL. Regulated Forms of Cell Death in Fungi. Front Microbiol 2017; 8:1837. [PMID: 28983298 PMCID: PMC5613156 DOI: 10.3389/fmicb.2017.01837] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 09/07/2017] [Indexed: 12/15/2022] Open
Abstract
Cell death occurs in all domains of life. While some cells die in an uncontrolled way due to exposure to external cues, other cells die in a regulated manner as part of a genetically encoded developmental program. Like other eukaryotic species, fungi undergo programmed cell death (PCD) in response to various triggers. For example, exposure to external stress conditions can activate PCD pathways in fungi. Calcium redistribution between the extracellular space, the cytoplasm and intracellular storage organelles appears to be pivotal for this kind of cell death. PCD is also part of the fungal life cycle, in which it occurs during sexual and asexual reproduction, aging, and as part of development associated with infection in phytopathogenic fungi. Additionally, a fungal non-self-recognition mechanism termed heterokaryon incompatibility (HI) also involves PCD. Some of the molecular players mediating PCD during HI show remarkable similarities to major constituents involved in innate immunity in metazoans and plants. In this review we discuss recent research on fungal PCD mechanisms in comparison to more characterized mechanisms in metazoans. We highlight the role of PCD in fungi in response to exogenic compounds, fungal development and non-self-recognition processes and discuss identified intracellular signaling pathways and molecules that regulate fungal PCD.
Collapse
Affiliation(s)
- A Pedro Gonçalves
- Plant and Microbial Biology Department, University of California, BerkeleyBerkeley, CA, United States
| | - Jens Heller
- Plant and Microbial Biology Department, University of California, BerkeleyBerkeley, CA, United States
| | - Asen Daskalov
- Plant and Microbial Biology Department, University of California, BerkeleyBerkeley, CA, United States
| | - Arnaldo Videira
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do PortoPorto, Portugal.,I3S - Instituto de Investigação e Inovação em SaúdePorto, Portugal
| | - N Louise Glass
- Plant and Microbial Biology Department, University of California, BerkeleyBerkeley, CA, United States
| |
Collapse
|
31
|
Polke M, Leonhardt I, Kurzai O, Jacobsen ID. Farnesol signalling in Candida albicans – more than just communication. Crit Rev Microbiol 2017; 44:230-243. [DOI: 10.1080/1040841x.2017.1337711] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Melanie Polke
- Research Group Microbial Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute (HKI), Jena, Germany
| | - Ines Leonhardt
- Septomics Research Center, Friedrich Schiller University and Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute (HKI), Jena, Germany
- Center for Sepsis Control and Care (CSCC), University Hospital, Jena, Germany
| | - Oliver Kurzai
- Septomics Research Center, Friedrich Schiller University and Leibniz Institute for Natural Product Research and Infection Biology – Hans Knoell Institute (HKI), Jena, Germany
- Center for Sepsis Control and Care (CSCC), University Hospital, Jena, Germany
- Friedrich Schiller University, Jena, Germany
| | - Ilse D. Jacobsen
- Research Group Microbial Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute (HKI), Jena, Germany
- Center for Sepsis Control and Care (CSCC), University Hospital, Jena, Germany
- Friedrich Schiller University, Jena, Germany
| |
Collapse
|
32
|
Tian J, Wang Y, Lu Z, Sun C, Zhang M, Zhu A, Peng X. Perillaldehyde, a Promising Antifungal Agent Used in Food Preservation, Triggers Apoptosis through a Metacaspase-Dependent Pathway in Aspergillus flavus. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:7404-7413. [PMID: 27622540 DOI: 10.1021/acs.jafc.6b03546] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In the present study, we provide detailed insights into perillaldehyde (PAE)'s mechanisms of action on Aspergillus flavus and offer evidence in favor of the induction of an apoptosis-like phenotype. Specifically, PAE's antifungal mode of action was investigated through the detection of mitochondrial membrane potential (MtΔψ) and phosphatidylserine (PS) exposure, as well as intracellular Ca2+ level, reactive oxygen species accumulation, and metacaspase activation. This was done by way of fluorometry, measuring DNA fragmentation, and condensation by fluorescent microscopy. Furthermore, we searched for phenotypic changes characteristic of apoptosis by transmission electron microscopy and flow cytometry, determining the amount of cytochrome c released using Western blotting. Results indicated that cultivation of A. flavus in the presence of PAE caused depolarization of MtΔψ, rapid DNA condensation, large-scale DNA fragmentation, and an elevation of intracellular Ca2+ level. The percentage of early apoptotic cells with exposure of PS were 27.4% and 48.7%, respectively, after 9 h incubations with 0.25 and 0.5 μL/mL of PAE. The percentage of stained cells with activated intracellular metacaspases exposed to PAE at concentrations of 0.25 and 0.5 μL/mL compared with control subjects were increased by 28.4 ± 3.25% and 37.9 ± 4.24%, respectively. The above results has revealed that PAE induces fungal apoptosis through a caspase-dependent mitochondrial pathway. In all, our findings provide a novel mechanism for exploring a possible antifungal agent used in food preservation.
Collapse
Affiliation(s)
- Jun Tian
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen , Shenzhen 518057, Guangdong, People's Republic of China
| | - Yanzhen Wang
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
| | - Zhaoqun Lu
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
| | - Chunhui Sun
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
| | - Man Zhang
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
| | - Aihua Zhu
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
| | - Xue Peng
- College of Life Science, Jiangsu Normal University , Xuzhou 221116, Jiangsu Province, People's Republic of China
| |
Collapse
|
33
|
Wongsuk T, Pumeesat P, Luplertlop N. Fungal quorum sensing molecules: Role in fungal morphogenesis and pathogenicity. J Basic Microbiol 2016; 56:440-7. [PMID: 26972663 DOI: 10.1002/jobm.201500759] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 02/19/2016] [Indexed: 01/19/2023]
Abstract
When microorganisms live together in high numbers, they need to communicate with each other. To achieve cell-cell communication, microorganisms secrete molecules called quorum-sensing molecules (QSMs) that control their biological activities and behaviors. Fungi secrete QSMs such as farnesol, tyrosol, phenylethanol, and tryptophol. The role of QSMs in fungi has been widely studied in both yeasts and filamentous fungi, for example in Candida albicans, C. dubliniensis, Aspergillus niger, A. nidulans, and Fusarium graminearum. QSMs impact fungal morphogenesis (yeast-to-hypha formation) and also play a role in the germination of macroconidia. QSMs cause fungal cells to initiate programmed cell death, or apoptosis, and play a role in fungal pathogenicity. Several types of QSMs are produced during stages of biofilm development to control cell population or morphology in biofilm communities. This review article emphasizes the role of fungal QSMs, especially in fungal morphogenesis, biofilm formation, and pathogenicity. Information about QSMs may lead to improved measures for controlling fungal infection.
Collapse
Affiliation(s)
- Thanwa Wongsuk
- Department of Clinical Pathology, Faculty of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand.,Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Potjaman Pumeesat
- Department of Medical Technology, Faculty of Science and Technology, Bansomdejchaopraya Rajabhat University, Bangkok, Thailand.,Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Natthanej Luplertlop
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Center for Emerging and Neglected Infectious Diseases, Mahidol University, Salaya Campus, Nakorn Pathom, Thailand
| |
Collapse
|
34
|
Prchalová D, Buček A, Brabcová J, Žáček P, Kindl J, Valterová I, Pichová I. Regulation of Isoprenoid Pheromone Biosynthesis in Bumblebee Males. Chembiochem 2015; 17:260-7. [PMID: 26632352 DOI: 10.1002/cbic.201500415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Indexed: 11/08/2022]
Abstract
Males of the closely related species Bombus terrestris and Bombus lucorum attract conspecific females by completely different marking pheromones. MP of B. terrestris and B. lucorum pheromones contain mainly isoprenoid (ISP) compounds and fatty acid derivatives, respectively. Here, we studied the regulation of ISP biosynthesis in both bumblebees. RNA-seq and qRT-PCR analyses indicated that acetoacetyl-CoA thiolase (AACT), 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR), and farnesyl diphosphate synthase (FPPS) transcripts are abundant in the B. terrestris labial gland. Maximal abundance of these transcripts correlated well with AACT enzymatic activity detected in the LG extracts. In contrast, transcript abundances of AACT, HMGR, and FPPS in B. lucorum were low, and AACT activity was not detected in LGs. These results suggest that transcriptional regulation plays a key role in the control of ISP biosynthetic gene expression and ISP pheromone biosynthesis in bumblebee males.
Collapse
Affiliation(s)
- Darina Prchalová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Aleš Buček
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Jana Brabcová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Petr Žáček
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Jiří Kindl
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Irena Valterová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Iva Pichová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i. Flemingovo n. 2, 166 10, Prague 6, Czech Republic.
| |
Collapse
|
35
|
The fungal quorum-sensing molecule farnesol activates innate immune cells but suppresses cellular adaptive immunity. mBio 2015; 6:e00143. [PMID: 25784697 PMCID: PMC4453522 DOI: 10.1128/mbio.00143-15] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Farnesol, produced by the polymorphic fungus Candida albicans, is the first quorum-sensing molecule discovered in eukaryotes. Its main function is control of C. albicans filamentation, a process closely linked to pathogenesis. In this study, we analyzed the effects of farnesol on innate immune cells known to be important for fungal clearance and protective immunity. Farnesol enhanced the expression of activation markers on monocytes (CD86 and HLA-DR) and neutrophils (CD66b and CD11b) and promoted oxidative burst and the release of proinflammatory cytokines (tumor necrosis factor alpha [TNF-α] and macrophage inflammatory protein 1 alpha [MIP-1α]). However, this activation did not result in enhanced fungal uptake or killing. Furthermore, the differentiation of monocytes to immature dendritic cells (iDC) was significantly affected by farnesol. Several markers important for maturation and antigen presentation like CD1a, CD83, CD86, and CD80 were significantly reduced in the presence of farnesol. Furthermore, farnesol modulated migrational behavior and cytokine release and impaired the ability of DC to induce T cell proliferation. Of major importance was the absence of interleukin 12 (IL-12) induction in iDC generated in the presence of farnesol. Transcriptome analyses revealed a farnesol-induced shift in effector molecule expression and a down-regulation of the granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor during monocytes to iDC differentiation. Taken together, our data unveil the ability of farnesol to act as a virulence factor of C. albicans by influencing innate immune cells to promote inflammation and mitigating the Th1 response, which is essential for fungal clearance. Farnesol is a quorum-sensing molecule which controls morphological plasticity of the pathogenic yeast Candida albicans. As such, it is a major mediator of intraspecies communication. Here, we investigated the impact of farnesol on human innate immune cells known to be important for fungal clearance and protective immunity. We show that farnesol is able to enhance inflammation by inducing activation of neutrophils and monocytes. At the same time, farnesol impairs differentiation of monocytes into immature dendritic cells (iDC) by modulating surface phenotype, cytokine release and migrational behavior. Consequently, iDC generated in the presence of farnesol are unable to induce proper T cell responses and fail to secrete Th1 promoting interleukin 12 (IL-12). As farnesol induced down-regulation of the granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor, desensitization to GM-CSF could potentially explain transcriptional reprofiling of iDC effector molecules. Taken together, our data show that farnesol can also mediate Candida-host communication and is able to act as a virulence factor.
Collapse
|