101
|
Can Saccharomyces cerevisiae keep up as a model system in fungal azole susceptibility research? Drug Resist Updat 2019; 42:22-34. [PMID: 30822675 DOI: 10.1016/j.drup.2019.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/30/2019] [Accepted: 02/11/2019] [Indexed: 12/14/2022]
Abstract
The difficulty of manipulation and limited availability of genetic tools for use in many pathogenic fungi hamper fast and adequate investigation of cellular metabolism and consequent possibilities for antifungal therapies. S. cerevisiae is a model organism that is used to study many eukaryotic systems. In this review, we analyse the potency and relevance of this model system in investigating fungal susceptibility to azole drugs. Although many of the concepts apply to multiple pathogenic fungi, for the sake of simplicity, we will focus on the validity of using S. cerevisiae as a model organism for two Candida species, C. albicans and C. glabrata. Apart from the general benefits, we explore how S. cerevisiae can specifically be used to improve our knowledge on azole drug resistance and enables fast and efficient screening for novel drug targets in combinatorial therapy. We consider the shortcomings of the model system, yet conclude that it is still opportune to use S. cerevisiae as a model system for pathogenic fungi in this era.
Collapse
|
102
|
Yang M, Lu L, Li S, Zhang J, Li Z, Wu S, Guo Q, Liu H, Wang C. Transcriptomic Insights into Benzenamine Effects on the Development, Aflatoxin Biosynthesis, and Virulence of Aspergillus flavus. Toxins (Basel) 2019; 11:E70. [PMID: 30691218 PMCID: PMC6410012 DOI: 10.3390/toxins11020070] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/24/2019] [Accepted: 01/25/2019] [Indexed: 01/02/2023] Open
Abstract
Aspergillus flavus is a soilborne pathogenic fungus that poses a serious public health threat due to it contamination of food with carcinogenic aflatoxins. Our previous studies have demonstrated that benzenamine displayed strong inhibitory effects on the mycelial growth of A. flavus. In this study, we systematically investigated the inhibitory effects of benzenamine on the development, aflatoxin biosynthesis, and virulence in A. flavus, as well as the underlying mechanism. The results indicated that benzenamine exhibited great capacity to combat A. flavus at a concentration of 100 µL/L, leading to significantly decreased aflatoxin accumulation and colonization capacity in maize. The transcriptional profile revealed that 3589 genes show altered mRNA levels in the A. flavus after treatment with benzenamine, including 1890 down-regulated and 1699 up-regulated genes. Most of the differentially expressed genes participated in the biosynthesis and metabolism of amino acid, purine metabolism, and protein processing in endoplasmic reticulum. Additionally, the results brought us to a suggestion that benzenamine affects the development, aflatoxin biosynthesis, and pathogenicity of A. flavus via down-regulating related genes by depressing the expression of the global regulatory factor leaA. Overall, this study indicates that benzenamine have tremendous potential to act as a fumigant against pathogenic A. flavus. Furthermore, this work offers valuable information regarding the underlying antifungal mechanism of benzenamine against A. flavus at the level of transcription, and these potential targets may be conducive in developing new strategies for preventing aflatoxin contamination.
Collapse
Affiliation(s)
- Mingguan Yang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Laifeng Lu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Shuhua Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Jing Zhang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Zhenjing Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Shufen Wu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Qingbin Guo
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Huanhuan Liu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Changlu Wang
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China.
| |
Collapse
|
103
|
Hu Z, Li G, Sun Y, Niu Y, Ma L, He B, Ai M, Han J, Zeng B. Gene transcription profiling of Aspergillus oryzae 3.042 treated with ergosterol biosynthesis inhibitors. Braz J Microbiol 2019; 50:43-52. [PMID: 30637636 PMCID: PMC6863321 DOI: 10.1007/s42770-018-0026-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 10/04/2018] [Indexed: 01/05/2023] Open
Abstract
Ergosterol, a unique component of fungal cells, is not only important for fungal growth and stress responses but also holds great economic value. Limited studies have been performed on ergosterol biosynthesis in Aspergillus oryzae, a safe filamentous fungus that has been used for the manufacture of oriental fermented foods. This study revealed that the ergosterol biosynthesis pathway is conserved between Saccharomyces cerevisiae and A. oryzae 3.042 by treatment with ergosterol biosynthesis inhibitors and bioinformatics analysis. However, the ergosterol biosynthesis pathway in A. oryzae 3.042 is more complicated than that in S. cerevisiae as there are multiple paralogs encoding the same biosynthetic enzymes. Using RNA-seq, this study identified 138 and 104 differentially expressed genes (DEG) in response to the ergosterol biosynthesis inhibitors tebuconazole and terbinafine, respectively. The results showed that the most common DEGs were transport- and metabolism-related genes. There were only 17 DEGs regulated by both tebuconazole and terbinafine treatments and there were 256 DEGs between tebuconazole and terbinafine treatments. These results provide new information on A. oryzae ergosterol biosynthesis and regulation mechanisms, which may lay the foundation for genetic modification of the ergosterol biosynthesis pathway in A. oryzae.
Collapse
Affiliation(s)
- Zhihong Hu
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Ganghua Li
- Hubei Key Laboratory of Edible Wild Plants Conservation and Utilization, Hubei Normal University, Huangshi, 435002, China
| | - Yunlong Sun
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Yali Niu
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Long Ma
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Bin He
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Mingqiang Ai
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Jizhong Han
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China
| | - Bin Zeng
- Jiangxi Key Laboratory of Bioprocess Engineering and Co-Innovation Center for In-vitro Diagnostic Reagents and Devices of Jiangxi Province, college of life sciences, Jiangxi Science & Technology Normal University, Nanchang, 330013, China.
| |
Collapse
|
104
|
Zhao F, Bai P, Nan W, Li D, Zhang C, Lu C, Qi H, Lu W. A modular engineering strategy for high‐level production of protopanaxadiol from ethanol by
Saccharomyces cerevisiae. AIChE J 2018. [DOI: 10.1002/aic.16502] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fanglong Zhao
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Peng Bai
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Weihua Nan
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Dashuai Li
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Chuanbo Zhang
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Chunzhe Lu
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Haishan Qi
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
| | - Wenyu Lu
- Dept. of Biological EngineeringSchool of Chemical Engineering and Technology, Tianjin University Tianjin P.R. China
- Key Laboratory of System BioengineeringTianjin University, Ministry of Education Tianjin P.R. China
- Collaborative Innovation Center of Chemical Science and EngineeringTianjin University, SynBio Res Platform Tianjin P.R. China
| |
Collapse
|
105
|
Liu J, Zhai Y, Zhang Y, Zhu S, Liu G, Che Y. Heterologous Biosynthesis of the Fungal Sesquiterpene Trichodermol in Saccharomyces cerevisiae. Front Microbiol 2018; 9:1773. [PMID: 30127776 PMCID: PMC6087768 DOI: 10.3389/fmicb.2018.01773] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 07/16/2018] [Indexed: 01/01/2023] Open
Abstract
Trichodermol, a fungal sesquiterpene derived from the farnesyl diphosphate pathway, is the biosynthetic precursor for trichodermin, a member of the trichothecene class of fungal toxins produced mainly by the genera of Trichoderma and Fusarium. Trichodermin is a promising candidate for the development of fungicides and antitumor agents due to its significant antifungal and cytotoxic effects. It can also serve as a scaffold to generate new congeners for structure-activity relationship (SAR) study. We reconstructed the biosynthetic pathway of trichodermol in Saccharomyces cerevisiae BY4741, and investigated the effect of produced trichodermol on the host by de novo RNA sequencing (RNA-Seq) and quantitative Real-time PCR analyses. Co-expression of pESC::FgTRI5 using plasmid pLLeu-tHMGR-UPC2.1 led to trichodiene production of 683 μg L-1, while integration of only the codon-optimized FgTRI5 into the chromosome of yeast improved the production to 6,535 μg L-1. Subsequent expression of the codon-optimized cytochrome P450 monooxygenase encoding genes, TaTRI4 and TaTRI11, resulted in trichodermol, with an estimated titer of 252 μg L-1 at shake flask level. RNA-Seq and qPCR analyses revealed that the produced trichodermol downregulated the expression of the genes involved in ergosterol biosynthesis, but significantly upregulated the expression of PDR5 related to membrane transport pathway in S. cerevisiae. Collectively, we achieved the first heterologous biosynthesis of trichodermol by reconstructing its biosynthetic pathway in yeast, and the reconstructed pathway will serve as a platform to generate trichodermin analogs as potential candidates for agrochemicals and anticancer agents through further optimizations.
Collapse
Affiliation(s)
- Jianghua Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yanan Zhai
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin, China
| | - Yang Zhang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Shuaiming Zhu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| | - Gang Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Yongsheng Che
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin, China.,State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, China
| |
Collapse
|
106
|
Chen L, Zhao B, Fan Z, Liu X, Wu Q, Li H, Wang H. Synthesis of Novel 3,4-Chloroisothiazole-Based Imidazoles as Fungicides and Evaluation of Their Mode of Action. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7319-7327. [PMID: 29913064 DOI: 10.1021/acs.jafc.8b02332] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A molecular design approach was used in our laboratory to guide the development of imidazole-based fungicides. Based on homology modeling and molecular docking studies targeting the cytochrome P450-dependent sterol 14α-demethylase, 3,4-dichloroisothiazole-based imidazoles showed great potential. Several such compounds were then rationally designed, synthesized, characterized, and their antifungal activities were evaluated. Bioassay results showed that compounds such as ( R)-11, ( R)-12, and ( S)-11 have commendable, broad-spectrum antifungal activities that are comparable to those of commercial products. Based on Q-PCR testing and microscopy observations, the imidazole derivatives affect fungal cell wall formation through the inhibition of the BcCYP51 expression system. These findings strongly suggest that the mode of action of these imidazole compounds is similar to that of tioconazole and imazalil. This report indicates that this molecular design strategy is not only practical but productive.
Collapse
Affiliation(s)
- Lai Chen
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| | - Bin Zhao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| | - Zhijin Fan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| | - Xiumei Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| | - Qifan Wu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| | - Hongpeng Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| | - Haixia Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry , Nankai University , No. 94, Weijin Road , Nankai District, Tianjin 300071 , P. R. China
| |
Collapse
|