1
|
Zhang Y, Zhang T, Qiu Y, Zhang M, Lu X, Yang W, Hu L, Zhou D, Gao B, Lu R. Transcriptomic Profiles of Vibrio parahaemolyticus During Biofilm Formation. Curr Microbiol 2023; 80:371. [PMID: 37838636 DOI: 10.1007/s00284-023-03425-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 07/19/2023] [Indexed: 10/16/2023]
Abstract
Vibrio parahaemolyticus, the leading cause of bacterial seafood-associated gastroenteritis, can form biofilms. In this work, the gene expression profiles of V. parahaemolyticus during biofilm formation were investigated by transcriptome sequencing. A total of 183, 503, and 729 genes were significantly differentially expressed in the bacterial cells at 12, 24 and 48 h, respectively, compared with that at 6 h. Of these, 92 genes were consistently activated or repressed from 6 to 48 h. The genes involved in polar flagellum, chemotaxis, mannose-sensitive haemagglutinin type IV pili, capsular polysaccharide, type III secretion system 1 (T3SS1), T3SS2, thermostable direct hemolysin (TDH), type VI secretion system 1 (T6SS1) and T6SS2 were downregulated, whereas those involved in V. parahaemolyticus pathogenicity island (Vp-PAI) (except for T3SS2 and TDH) and membrane fusion proteins were upregulated. Three extracellular protease genes (vppC, prtA and VPA1071) and a dozen of outer membrane protein encoding genes were also significantly differentially expressed during biofilm formation. In addition, five putative c-di-GMP metabolism-associated genes were significantly differentially expressed, which may account for the drop in c-di-GMP levels after the beginning of biofilm formation. Moreover, many putative regulatory genes were significantly differentially expressed, and more than 1000 putative small non-coding RNAs were detected, suggesting that biofilm formation was tightly regulated by complex regulatory networks. The data provided a global view of gene expression profiles during biofilm formation, showing that the significantly differentially expressed genes were involved in multiple cellular pathways, including virulence, biofilm formation, metabolism, and regulation.
Collapse
Affiliation(s)
- Yiquan Zhang
- Department of Clinical Laboratory, Affiliated Nantong Hospital 3 of Nantong University, Nantong, 226006, Jiangsu, China
- Department of Clinical Laboratory, Nantong Third People's Hospital, Nantong, 226006, Jiangsu, China
| | - Tingting Zhang
- Department of Clinical Laboratory, Affiliated Nantong Hospital 3 of Nantong University, Nantong, 226006, Jiangsu, China
- Department of Clinical Laboratory, Nantong Third People's Hospital, Nantong, 226006, Jiangsu, China
| | - Yue Qiu
- Department of Clinical Laboratory, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu, China
| | - Miaomiao Zhang
- Department of Clinical Laboratory, Affiliated Nantong Hospital 3 of Nantong University, Nantong, 226006, Jiangsu, China
- Department of Clinical Laboratory, Nantong Third People's Hospital, Nantong, 226006, Jiangsu, China
| | - Xiuhui Lu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Wenhui Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Lingfei Hu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Dongsheng Zhou
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Bo Gao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China.
| | - Renfei Lu
- Department of Clinical Laboratory, Affiliated Nantong Hospital 3 of Nantong University, Nantong, 226006, Jiangsu, China.
- Department of Clinical Laboratory, Nantong Third People's Hospital, Nantong, 226006, Jiangsu, China.
| |
Collapse
|
2
|
Zha F, Pang R, Huang S, Zhang J, Wang J, Chen M, Xue L, Ye Q, Wu S, Yang M, Gu Q, Ding Y, Wu Q, Zhang H. Proteomic analysis reveals the non-coding small RNA Qrr5 influences autoaggregation and growth competition in Vibrio parahaemolyticus. J Proteomics 2023; 279:104866. [PMID: 36918054 DOI: 10.1016/j.jprot.2023.104866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/13/2023] [Accepted: 02/23/2023] [Indexed: 03/13/2023]
Abstract
Vibrio parahaemolyticus, a sea-born bacterial pathogen, is a primary inducement of food-borne gastroenteritis. Previous studies have shown that non-coding small RNA plays a vital role in the regulation of multiple biological processes in pathogenic bacteria, especially autoaggregation and growth competition. However, the inherent mechanisms have not yet to be fully understood. As important regulators in Vibrios, the involvement of Qrr sRNAs in V. parahaemolyticus is largely unknown. Here, we carried out the Qrr5 deletion mutant and utilized a proteomic method to describe global proteomic alterations in response to Qrr5 deletion. A total of 297 significantly expressed proteins were determined between the Qrr5 deletion mutant and wild-type strain, among which 137 proteins were upregulated and 160 proteins were downregulated. The upregulated proteins principally participated in membrane transporters and signal transcription, while the downregulated proteins participated in the two-component system and transcription factor binding. Notably, transcriptional regulator LysR, outer membrane protein OmpA, and conjugal transfer protein TraA-related proteins were upregulated, causing the promotion of autoaggregation ability and growth competition ability against E. coli. This study provides insights into the regulatory network of sRNA in this bacterium, which will facilitate further explorations of important biological processes in pathogenic bacteria. SIGNIFICANCE: sRNA Qrr5 is an important regulator involved in bacterial multiple physiological processes, including auto-aggregation and growth competition among food-borne pathogens Vibrio parahaemolyticus. Here, utilizing a TMT-labeling proteomic approach, we identified 137 proteins were upregulated and 160 proteins were downregulated between the Qrr5 deletion mutant and wild-type strain. The upregulated proteins were involved in membrane transporters and signal transcription, while downregulated proteins were involved in the two-component system and transcription factor binding. Moreover, the LysR, OmpA, and TraA proteins were significantly upregulated, causing the promotion of autoaggregation and commensal growth competition ability. The mechanism of how Qrr5 regulates the targeted genes remains unclarified and need great efforts to explore.
Collapse
Affiliation(s)
- Fei Zha
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Rui Pang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Shixuan Huang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Juan Wang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Qinghua Ye
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Shi Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Meiyan Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Qihui Gu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Yu Ding
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, Ministry of Agriculture and Rural Affairs, Key Laboratory of Agricultural Microbiomics and Precision Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, Guangdong, China.
| | - Hao Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China.
| |
Collapse
|
3
|
Sarshar M, Scribano D, Palamara AT, Ambrosi C, Masotti A. The Acinetobacter baumannii model can explain the role of small non-coding RNAs as potential mediators of host-pathogen interactions. Front Mol Biosci 2022; 9:1088783. [PMID: 36619166 PMCID: PMC9810633 DOI: 10.3389/fmolb.2022.1088783] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022] Open
Abstract
Bacterial small RNAs (sRNAs) research has accelerated over the past decade, boosted by advances in RNA-seq technologies and methodologies for capturing both protein-RNA and RNA-RNA interactions. The emerging picture is that these regulatory sRNAs play important roles in controlling complex physiological processes and are required to survive the antimicrobial challenge. In recent years, the RNA content of OMVs/EVs has also gained increasing attention, particularly in the context of infection. Secreted RNAs from several bacterial pathogens have been characterized but the exact mechanisms promoting pathogenicity remain elusive. In this review, we briefly discuss how secreted sRNAs interact with targets in infected cells, thus representing a novel perspective of host cell manipulation during bacterial infection. During the last decade, Acinetobacter baumannii became clinically relevant emerging pathogens responsible for nosocomial and community-acquired infections. Therefore, we also summarize recent findings of regulation by sRNAs in A. baumannii and discuss how this emerging bacterium utilizes many of these sRNAs to adapt to its niche and become successful human pathogen.
Collapse
Affiliation(s)
- Meysam Sarshar
- Research Laboratories, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy,*Correspondence: Meysam Sarshar, ; Andrea Masotti,
| | - Daniela Scribano
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Anna Teresa Palamara
- Laboratory Affiliated to Institute Pasteur Italia-Cenci Bolognetti Foundation, Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy,Department of Infectious Diseases, National Institute of Health, Rome, Italy
| | - Cecilia Ambrosi
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, Rome, Italy,IRCCS San Raffaele Roma, Rome, Italy
| | - Andrea Masotti
- Research Laboratories, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy,*Correspondence: Meysam Sarshar, ; Andrea Masotti,
| |
Collapse
|
4
|
Transcriptomic Analysis of Vibrio parahaemolyticus Underlying the Wrinkly and Smooth Phenotypes. Microbiol Spectr 2022; 10:e0218822. [PMID: 36098555 PMCID: PMC9604176 DOI: 10.1128/spectrum.02188-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Vibrio parahaemolyticus, a causative agent of seafood-associated gastroenteritis, undergoes opaque-translucent (OP-TR) colony switching associated with capsular polysaccharide (CPS) production. Here, we showed that V. parahaemolyticus was also able to naturally and reversibly switch between wrinkly and smooth phenotypes. More than 1,000 genes were significantly differentially expressed during colony morphology switching, including the major virulence gene loci and key biofilm-related genes. The genes responsible for type III secretion system 1 (T3SS1), type VI secretion systems (T6SS1 and T6SS2), and flagellar synthesis were downregulated in the wrinkly spreader phenotype, whereas genes located on the pathogenicity island Vp-PAI and those responsible for chitin-regulated pili (ChiRP) and Syp exopolysaccharide synthesis were upregulated. In addition, we showed that the wrinkly spreader grew faster, had greater motility and biofilm capacities, and produced more c-di-GMP than the smooth type. A dozen genes potentially associated with c-di-GMP metabolism were shown to be significantly differentially expressed, which may account for the differences in c-di-GMP levels between the two phenotypes. Most importantly, dozens of putative regulators were significantly differentially expressed, and hundreds of noncoding RNAs were detected during colony morphology switching, indicating that phenotype switching is strictly regulated by a complex molecular regulatory network in V. parahaemolyticus. Taken together, the presented work highlighted the gene expression profiles related to wrinkly-smooth switching, showing that the significantly differentially expressed genes were involved in various biological behaviors, including virulence factor production, biofilm formation, metabolism, adaptation, and colonization. IMPORTANCE We showed that Vibrio parahaemolyticus was able to naturally and reversibly switch between wrinkly and smooth phenotypes and disclosed the gene expression profiles related to wrinkly-smooth switching, showing that the significantly differentially expressed genes between the two colony morphology phenotypes were involved in various biological behaviors, including virulence factor production, biofilm formation, metabolism, adaptation, and colonization.
Collapse
|
5
|
Lee KW, Wen Y, Park NY, Kim KS. Quorum sensing and iron-dependent coordinated control of autoinducer-2 production via small RNA RyhB in Vibrio vulnificus. Sci Rep 2022; 12:831. [PMID: 35039556 PMCID: PMC8764119 DOI: 10.1038/s41598-021-04757-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 12/29/2021] [Indexed: 12/12/2022] Open
Abstract
Roles for the non-coding small RNA RyhB in quorum-sensing and iron-dependent gene modulation in the human pathogen V. vulnificus were assessed in this study. Both the quorum sensing master regulator SmcR and the Fur-iron complex were observed to bind to the region upstream of the non-coding small RNA RyhB gene to repress expression, which suggests that RyhB is associated with both quorum-sensing and iron-dependent signaling in this pathogen. We found that expression of LuxS, which is responsible for the biosynthesis of autoinducer-2 (AI-2), was higher in wild type than in a ryhB-deletion isotype. RyhB binds directly to the 5′-UTR (untranslated region) of the luxS transcript to form a heteroduplex, which not only stabilizes luxS mRNA but also disrupts the secondary structure that normally obscures the translational start codon and thereby allows translation of LuxS to begin. The binding of RyhB to luxS mRNA requires the chaperone protein Hfq, which stabilizes RyhB. These results demonstrate that the small RNA RyhB is a key element associated with feedback control of AI-2 production, and that it inhibits quorum-sensing signaling in an iron-dependent manner. This study, taken together with previous studies, shows that iron availability and cell density signals are funneled to SmcR and RyhB, and that these regulators coordinate cognate signal pathways that result in the proper balance of protein expression in response to environmental conditions.
Collapse
Affiliation(s)
- Keun-Woo Lee
- Department of Life Sciences, Sogang University, Baekbeom-Ro, Mapo-Gu, Seoul, 121-742, Korea
| | - Yancheng Wen
- Department of Life Sciences, Sogang University, Baekbeom-Ro, Mapo-Gu, Seoul, 121-742, Korea.,Key Laboratory of Ministry of Education for Gastrointestinal Cancer Research Center for Molecular Medicine, Fujian Medical University, Fuzhou, Fujian, People's Republic of China
| | - Na-Young Park
- Department of Life Sciences, Sogang University, Baekbeom-Ro, Mapo-Gu, Seoul, 121-742, Korea
| | - Kun-Soo Kim
- Department of Life Sciences, Sogang University, Baekbeom-Ro, Mapo-Gu, Seoul, 121-742, Korea.
| |
Collapse
|
6
|
Henderson CA, Vincent HA, Callaghan AJ. Reprogramming Gene Expression by Targeting RNA-Based Interactions: A Novel Pipeline Utilizing RNA Array Technology. ACS Synth Biol 2021; 10:1847-1858. [PMID: 34283568 DOI: 10.1021/acssynbio.0c00603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Regulatory RNA-based interactions are critical for coordinating gene expression and are increasingly being targeted in synthetic biology, antimicrobial, and therapeutic fields. Bacterial trans-encoded small RNAs (sRNAs) regulate the translation and/or stability of mRNA targets through base-pairing interactions. These interactions are often integral to complex gene circuits which coordinate critical bacterial processes. The ability to predictably modulate these gene circuits has potential for reprogramming gene expression for synthetic biology and antibacterial purposes. Here, we present a novel pipeline for targeting such RNA-based interactions with antisense oligonucleotides (ASOs) in order to reprogram gene expression. As proof-of-concept, we selected sRNA-mRNA interactions that are central to the Vibrio cholerae quorum sensing pathway, required for V. cholerae pathogenesis, as a regulatory RNA-based interaction input. We rationally designed anti-sRNA ASOs to target the sRNAs and synthesized them as peptide nucleic acids (PNAs). Next, we devised an RNA array-based interaction assay to allow screening of the anti-sRNA ASOs in vitro. Finally, an Escherichia coli-based gene expression reporter assay was developed and used to validate anti-sRNA ASO regulatory activity in a cellular environment. The output from the pipeline was an anti-sRNA ASO that targets sRNAs to inhibit sRNA-mRNA interactions and modulate gene expression. This anti-sRNA ASO has potential for reprogramming gene expression for synthetic biology and/or antibacterial purposes. We anticipate that this pipeline will find widespread use in fields targeting RNA-based interactions as modulators of gene expression.
Collapse
Affiliation(s)
- Charlotte A. Henderson
- School of Biological Sciences and Institute of Biological and Biomedical Sciences, University of Portsmouth, Portsmouth, PO1 2DY, United Kingdom
| | - Helen A. Vincent
- School of Biological Sciences and Institute of Biological and Biomedical Sciences, University of Portsmouth, Portsmouth, PO1 2DY, United Kingdom
| | - Anastasia J. Callaghan
- School of Biological Sciences and Institute of Biological and Biomedical Sciences, University of Portsmouth, Portsmouth, PO1 2DY, United Kingdom
| |
Collapse
|
7
|
Pang R, Li Y, Liao K, Guo P, Li Y, Yang X, Zhang S, Lei T, Wang J, Chen M, Wu S, Xue L, Wu Q. Genome- and Proteome-Wide Analysis of Lysine Acetylation in Vibrio vulnificus Vv180806 Reveals Its Regulatory Roles in Virulence and Antibiotic Resistance. Front Microbiol 2020; 11:591287. [PMID: 33250879 PMCID: PMC7674927 DOI: 10.3389/fmicb.2020.591287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 10/15/2020] [Indexed: 12/31/2022] Open
Abstract
Infection with Vibrio vulnificus is notorious for its atypical clinical manifestations and irreversible disease progression. Lysine acetylation is a conserved post-translational modification (PTM) that plays a critical regulatory role in diverse cellular processes. However, little is known about the role of lysine acetylation on the pathogenesis of V. vulnificus. Here, we report the complete genome sequence and a global profile for protein lysine acetylation of V. vulnificus Vv180806, a highly cefoxitin resistant strain isolated from a mortality case. The assembled genome comprised two circular chromosomes and one circular plasmid; it contained 4,770 protein-coding genes and 153 RNA genes. Phylogenetic analysis revealed genetic homology of this strain with other V. vulnificus strains from food sources. Of all the proteins in this strain, 1,924 (40.34%) were identified to be acetylated at 6,626 sites. The acetylated proteins were enriched in metabolic processes, binding functions, cytoplasm, and multiple central metabolic pathways. Moreover, the acetylation was found in most identified virulence factors of this strain, suggesting its potentially important role in bacterial virulence. Our work provides insights into the genomic and acetylomic features responsible for the virulence and antibiotic resistance of V. vulnificus, which will facilitate future investigations on the pathogenesis of this bacterium.
Collapse
Affiliation(s)
- Rui Pang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Ying Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Kang Liao
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Penghao Guo
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yanping Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xiaojuan Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Shuhong Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Tao Lei
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Juan Wang
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Shi Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| |
Collapse
|
8
|
Deng Y, Su Y, Liu S, Bei L, Guo Z, Li H, Chen C, Feng J. A novel sRNA srvg17985 identified in Vibrio alginolyticus involving into metabolism and stress response. Microbiol Res 2019; 229:126295. [PMID: 31450184 DOI: 10.1016/j.micres.2019.126295] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 06/23/2019] [Accepted: 06/26/2019] [Indexed: 11/28/2022]
Abstract
Vibrio alginolyticus is an opportunistic pathogen that is a threat to the aquaculture industry. Evidence has revealed critical roles for small RNAs (sRNAs) in bacterial physiology and pathology by modulating gene expression post transcription. However, little information about sRNA-mediated regulation in V. alginolyticus is available. We experimentally verified the existence and characterized the function of sRNA srvg17985 in V. alginolyticus ZJ-T. We identified a 179 nt and growth-phase-dependent transcript with a σ70 promoter and a ρ-independent terminator. The transcript consisted of five stem-loops and was conserved in Vibrio spp. Phenotype microarray assays showed that deletion of srvg17985 led to less use of Gly-Glu as a carbon source but a gain in ability to use l-phenylalanine as a nitrogen source. Srvg17985 regulated the osmotic stress response with stronger tolerance to NaCl but weaker tolerance to urea. In addition, srvg17985 inhibited the deamination of l-serine at pH 9.5 and promoted the hydrolysis of X-beta-d-glucuronide, thus affecting the pH stress response. Bioinformatics by IntaRNA and TargetRNA2 identified 45 common target mRNAs, some of which probably contributed to the observed phenotypes. These results indicated that srvg17985 regulated environmental adaptation. The results provide valuable information for in-depth studies of sRNA-mediated regulation mechanisms of the complex physiological processes of V alginolyticus and provide new targets for antibacterial therapeutics or attenuated vaccines for Vibrio spp.
Collapse
Affiliation(s)
- Yiqin Deng
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China; Tropical Aquaculture Research and Development Centre, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hainan, China
| | - Youlu Su
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Songlin Liu
- Key Laboratory of Tropical Marine Bio-Resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Lei Bei
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Zhixun Guo
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - Huo Li
- Jinyang Tropical Haizhen Aquaculture Co., Ltd., Maoming, China
| | - Chang Chen
- Xisha/Nansha Ocean Observation and Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Juan Feng
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China; Tropical Aquaculture Research and Development Centre, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Hainan, China.
| |
Collapse
|
9
|
Plaza N, Pérez-Reytor D, Ramírez-Araya S, Pavón A, Corsini G, Loyola DE, Jaña V, Pavéz L, Navarrete P, Bastías R, Castillo D, García K. Conservation of Small Regulatory RNAs in Vibrio parahaemolyticus: Possible role of RNA-OUT Encoded by the Pathogenicity Island (VPaI-7) of Pandemic Strains. Int J Mol Sci 2019; 20:ijms20112827. [PMID: 31185635 PMCID: PMC6601013 DOI: 10.3390/ijms20112827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/03/2019] [Accepted: 06/05/2019] [Indexed: 01/08/2023] Open
Abstract
Small regulatory RNAs (sRNAs) are molecules that play an important role in the regulation of gene expression. sRNAs in bacteria can affect important processes, such as metabolism and virulence. Previous studies showed a significant role of sRNAs in the Vibrio species, but knowledge about Vibrio parahaemolyticus is limited. Here, we examined the conservation of sRNAs between V. parahaemolyticus and other human Vibrio species, in addition to investigating the conservation between V. parahaemolyticus strains differing in pandemic origin. Our results showed that only 7% of sRNAs were conserved between V. parahaemolyticus and other species, but 88% of sRNAs were highly conserved within species. Nonetheless, two sRNAs coding to RNA-OUT, a component of the Tn10/IS10 system, were exclusively present in pandemic strains. Subsequent analysis showed that both RNA-OUT were located in pathogenicity island-7 and would interact with transposase VPA1379, according to the model of pairing of IS10-encoded antisense RNAs. According to the location of RNA-OUT/VPA1379, we also investigated if they were expressed during infection. We observed that the transcriptional level of VPA1379 was significantly increased, while RNA-OUT was decreased at three hours post-infection. We suggest that IS10 transcription increases in pandemic strains during infection, probably to favor IS10 transposition and improve their fitness when they are facing adverse conditions.
Collapse
Affiliation(s)
- Nicolás Plaza
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
| | - Diliana Pérez-Reytor
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
| | - Sebastián Ramírez-Araya
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
- Departamento Ciencias Básicas, Facultad de Ciencias, Universidad Santo Tomás, Santiago 8320000, Chile.
| | - Alequis Pavón
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
| | - Gino Corsini
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
| | - David E Loyola
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
| | - Víctor Jaña
- Facultad de Medicina Veterinaria y Agronomía, Universidad de las Américas, Sede Providencia, Santiago 8320000, Chile.
| | - Leonardo Pavéz
- Instituto de Ciencias Naturales, Universidad de Las Américas, Santiago 8320000, Chile.
- Departamento de Ciencias Químicas y Biológicas, Universidad Bernardo O'Higgins, Santiago 8320000, Chile.
| | - Paola Navarrete
- Laboratorio de Microbiología y Probióticos, Millenium nucleus in the Biology of Intestinal Microbiota, INTA, Universidad de Chile, Santiago 8320000, Chile.
| | - Roberto Bastías
- Laboratorio de Microbiología, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso 2340000, Chile.
| | - Daniel Castillo
- Marine Biological Section, University of Copenhagen, Strandpromenaden 5, DK-3000, 1353 Helsingør, Denmark.
| | - Katherine García
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8320000, Chile.
| |
Collapse
|
10
|
Small-molecule inhibitor of HlyU attenuates virulence of Vibrio species. Sci Rep 2019; 9:4346. [PMID: 30867441 PMCID: PMC6416295 DOI: 10.1038/s41598-019-39554-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 01/10/2019] [Indexed: 02/08/2023] Open
Abstract
Increasing antibiotic resistance has led to the development of new strategies to combat bacterial infection. Anti-virulence strategies that impair virulence of bacterial pathogens are one of the novel approaches with less selective pressure for developing resistance than traditional strategies that impede viability. In this study, a small molecule CM14 [N-(4-oxo-4H-thieno[3,4-c]chromen-3-yl)-3-phenylprop-2-ynamide] that inhibits the activity of HlyU, a transcriptional regulator essential for the virulence of the fulminating human pathogen Vibrio vulnificus, has been identified. Without affecting bacterial growth or triggering the host cell death, CM14 reduces HlyU-dependent expression of virulence genes in V. vulnificus. In addition to the decreased hemolysis of human erythrocytes, CM14 impedes host cell rounding and lysis caused by V. vulnificus. Notably, CM14 significantly enhances survival of mice infected with V. vulnificus by alleviating hepatic and renal dysfunction and systemic inflammation. Biochemical, mass spectrometric, and mutational analyses revealed that CM14 inhibits HlyU from binding to target DNA by covalently modifying Cys30. Remarkably, CM14 decreases the expression of various virulence genes of other Vibrio species and thus attenuates their virulence phenotypes. Together, this molecule could be an anti-virulence agent against HlyU-harboring Vibrio species with a low selective pressure for the emergence of resistance.
Collapse
|
11
|
Peng B, Lin XP, Wang SN, Yang MJ, Peng XX, Li H. Polyvalent protective immunogens identified from outer membrane proteins of Vibrio parahaemolyticus and their induced innate immune response. FISH & SHELLFISH IMMUNOLOGY 2018; 72:104-110. [PMID: 29107742 DOI: 10.1016/j.fsi.2017.10.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/03/2017] [Accepted: 10/25/2017] [Indexed: 05/21/2023]
Abstract
Vaccines are the most economic, efficient and environment-friendly agents in protecting host against bacterial infection. In aquaculture, polyvalent vaccines targeting more than one bacterial specie are highly demanded due to the presence of various types of bacterial pathogens in farming environment. Here eighteen genes encoding outer membrane proteins of Vibrio parahaemolyticus were cloned and expressed. The expressed recombinant proteins were used for antiserum preparation. Passive and active immune protection of the antiserum and recombinant proteins was investigated in the zebrafish model. Two recombinant proteins, VP1667 and VP2369, showed effective immune protection against at least two genera of bacteria, Vibrio (V. parahaemolyticus and V. alginolyticus), Pseudomonas (P. fluorescens) or/and Aeromonas (A. hydrophila), and thereby are potential polyvalent vaccine candidates to defend against bacterial infection in fish farming. Furthermore, the mechanisms for the two polyvalent vaccines in triggering immune response were explored. Antiserum to VP1667 or VP2369 was not cross-reacted with P. fluorescens and A. hydrophila, whereas both recombinant proteins induced significant innate immune response. Comparatively, VP1667 stimulates stronger lymphokine and monokine, and VP2369 induces stronger humoral immune response, while both produce similar NF-κB, COX-2, TLR-1 and TLR-3 expression. Our results identify two polyvalent vaccines and demonstrate characteristics features of their cross-protection at the content of the innate immune response.
Collapse
Affiliation(s)
- Bo Peng
- Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, Guangdong Province Key Laboratory for Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, People's Republic of China
| | - Xiao-Peng Lin
- Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, Guangdong Province Key Laboratory for Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, People's Republic of China
| | - Sheng-Nan Wang
- Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, Guangdong Province Key Laboratory for Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, People's Republic of China
| | - Man-Jun Yang
- Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, Guangdong Province Key Laboratory for Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, People's Republic of China
| | - Xuan-Xian Peng
- Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, Guangdong Province Key Laboratory for Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, People's Republic of China
| | - Hui Li
- Center for Proteomics and Metabolomics, State Key Laboratory of Bio-Control, Guangdong Province Key Laboratory for Pharmaceutical Functional Genes, School of Life Sciences, Sun Yat-sen University, University City, Guangzhou 510006, People's Republic of China.
| |
Collapse
|
12
|
Abstract
The coordination of group behaviors in bacteria is accomplished via the cell-cell signaling process called quorum sensing. Vibrios have historically been models for studying bacterial communication due to the diverse and remarkable behaviors controlled by quorum sensing in these bacteria, including bioluminescence, type III and type VI secretion, biofilm formation, and motility. Here, we discuss the Vibrio LuxR/HapR family of proteins, the master global transcription factors that direct downstream gene expression in response to changes in cell density. These proteins are structurally similar to TetR transcription factors but exhibit distinct biochemical and genetic features from TetR that determine their regulatory influence on the quorum sensing gene network. We review here the gene groups regulated by LuxR/HapR and quorum sensing and explore the targets that are common and unique among Vibrio species.
Collapse
|
13
|
Lybecker MC, Samuels DS. Small RNAs of Borrelia burgdorferi: Characterizing Functional Regulators in a Sea of sRNAs
. THE YALE JOURNAL OF BIOLOGY AND MEDICINE 2017; 90:317-323. [PMID: 28656017 PMCID: PMC5482307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Borrelia (Borreliella) burgdorferi and closely related genospecies are the causative agents of Lyme disease, the most common tick-borne disease north of the equator. The bacterium, a member of the spirochete phylum, is acquired by a tick vector that feeds on an infected vertebrate host and is transmitted to another vertebrate during subsequent feeding by the next tick stage. The precise navigation of this enzootic cycle entails the regulation of genes required for these two host-specific phases as well as the transitions between them. Recently, an expansive swath of small RNAs has been identified in B. burgdorferi and likely many, if not most, are involved in regulating gene expression. Regardless, with only a few exceptions, the functions of these RNAs are completely unknown. However, several state-of-the-art approaches are available to identify the targets of these RNAs and provide insight into their role in the enzootic cycle and infection.
Collapse
Affiliation(s)
- Meghan C. Lybecker
- University of Colorado Colorado Springs, Department of Biology, Colorado Springs, CO,To whom all correspondence should be addressed: Meghan Lybecker, Department of Biology, University of Colorado, Colorado Springs, 1420 Austin Bluffs Parkway, Colorado Springs, CO 80917, Tel: 719-255-4101, .
| | - D. Scott Samuels
- University of Montana, Division of Biological Sciences, Missoula, MT
| |
Collapse
|
14
|
García K, Yáñez C, Plaza N, Peña F, Sepúlveda P, Pérez-Reytor D, Espejo RT. Gene expression of Vibrio parahaemolyticus growing in laboratory isolation conditions compared to those common in its natural ocean environment. BMC Microbiol 2017; 17:118. [PMID: 28525966 PMCID: PMC5437538 DOI: 10.1186/s12866-017-1030-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 05/12/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Vibrio parahaemolyticus is an autochthonous marine bacterial species comprising strains able to grow in broth containing bile salts at 37 °C, a condition seldom found in the ocean. However, this condition is used for isolation in the laboratory because it is considered a necessary property for pathogenesis. In this context, revealing how gene expression enables V. parahaemolyticus to adapt to this particular condition -common to almost all V. parahaemolyticus isolates- will improve our understanding of the biology of this important pathogen. To determine the genes of V. parahaemolyticus differentially expressed when growing in isolation condition (37 °C, 0.9% NaCl, and 0.04% bile salts) referred to those at the temperature and salt concentration prevailing in ocean south of Chile (marine-like condition; 12 °C, 3% NaCl, and absence of bile salts) we used high-throughput sequencing of RNA. RESULTS Our results showed that in the isolation condition, among the 5034 genes annotated in the V. parahaemolyticus RIMD2210633 genome, 344 were upregulated and 433 downregulated referred to the marine-like condition, managing an adjusted P-value (Padj) < E-5. Between the 50 more highly expressed genes, among the small RNAs (sRNA), the three carbon storage regulators B (CsrB) were up four to six times, while RyhB, related to iron metabolism besides motility control, was down about eight times. Among proteins, BfdA, a hemolysin-co-regulated protein (Hcp1) secreted by T6SS1, one of the most highly expressed genes, was about 140 times downregulated in isolation condition. The highest changes in relative expression were found among neighboring genes coding for proteins related to respiration, which were about 40 times upregulated. CONCLUSIONS When V. parahaemolyticus is grown in conditions used for laboratory isolation 777 genes are up- or downregulated referred to conditions prevailing in the marine-like condition; the most significantly overrepresented categories among upregulated processes were those related to transport and localization, while secretion and pathogenesis were overrepresented among downregulated genes. Genes with the highest differential expression included the sRNAs CsrB and RhyB and the mRNAs related with secretion, nutritional upshift, respiration and rapid growing.
Collapse
Affiliation(s)
- Katherine García
- Centro de Investigación Biomédica, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Av. El Llano Subercaseaux, 2801 Santiago, Chile
| | - Cristian Yáñez
- Institute of Nutrition and Food Technology, Universidad de Chile, Av. El Líbano 5524, Macul, Santiago, Chile
| | - Nicolás Plaza
- Centro de Investigación Biomédica, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Av. El Llano Subercaseaux, 2801 Santiago, Chile
- Institute of Nutrition and Food Technology, Universidad de Chile, Av. El Líbano 5524, Macul, Santiago, Chile
| | - Francisca Peña
- School of Bioinformatics Engineering, University of Talca, Talca, Chile
| | - Pedro Sepúlveda
- School of Bioinformatics Engineering, University of Talca, Talca, Chile
| | - Diliana Pérez-Reytor
- Centro de Investigación Biomédica, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Av. El Llano Subercaseaux, 2801 Santiago, Chile
| | - Romilio T. Espejo
- Institute of Nutrition and Food Technology, Universidad de Chile, Av. El Líbano 5524, Macul, Santiago, Chile
| |
Collapse
|