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Zhang Y, Ji T, Jiang Y, Zheng C, Yang H, Liu Q. Long-term effects of three compound probiotics on water quality, growth performances, microbiota distributions and resistance to Aeromonas veronii in crucian carp Carassius auratus gibelio. Fish Shellfish Immunol 2022; 120:233-241. [PMID: 34848306 DOI: 10.1016/j.fsi.2021.11.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Probiotics could promote the healthy growth of aquatic animals and have been widely used in aquaculture. However, the influence of high concentration compound probiotics on the aquatic animals has not been reported. In the present study, a compound probiotics was used in high-density culture of crucian carps under the condition of micro-water exchange. During nearly 7-weeks feeding experiment, the aquaculture water quality, growth performances, disease resistance and microbiota distributions of crucian carps were tested. Under the high concentrations of compound probiotics, the content of total ammonia nitrogen and nitrite were finally in a state of dynamic equilibrium. The body length and weight of crucian carps in the experimental group (E) was significantly higher than that in the recirculating group (R). The antioxidant enzymes in the intestines and gills of the E group including SOD, CAT, GSH and MDA, were significantly higher than those in R group. The mortality of crucian carps in E group was significantly lower after the immersion infection of Aeromonas veronii. The addition of compound probiotics significantly increased the number of microorganisms detected in the intestines and gills of crucian carps in E group. The bacteria including Firmicutes, Planctomycetes, Verrucomicrobiota at the phylum level in E group were higher than those in R group. At the genus level, these bacteria (Pirellula, Roseimicrobium, Malikia) were not only higher in E group water, but also significantly higher in the intestines and gills than R group. The results of present study systematically analyzed the impact of high-concentration probiotics on crucian carps breeding, and speculated genus Pirellula, Roseimicrobium, Malikia may be used as aquatic probiotics. The present study will provide a new idea for the green and sustainable development of aquaculture.
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Affiliation(s)
- Yingying Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Tongwei Ji
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Yinan Jiang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Chen Zheng
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China
| | - Hui Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China.
| | - Qiuning Liu
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, School of Wetland, Yancheng Teachers University, Yancheng, 224007, China.
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Li H, Ma X, Tang Y, Wang D, Zhang Z, Liu Z. Network-based analysis of virulence factors for uncovering Aeromonas veronii pathogenesis. BMC Microbiol 2021; 21:188. [PMID: 34162325 PMCID: PMC8223281 DOI: 10.1186/s12866-021-02261-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/15/2021] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Aeromonas veronii is a bacterial pathogen in aquaculture, which produces virulence factors to enable it colonize and evade host immune defense. Given that experimental verification of virulence factors is time-consuming and laborious, few virulence factors have been characterized. Moreover, most studies have only focused on single virulence factors, resulting in biased interpretation of the pathogenesis of A. veronii. RESULTS In this study, a PPI network at genome-wide scale for A. veronii was first constructed followed by prediction and mapping of virulence factors on the network. When topological characteristics were analyzed, the virulence factors had higher degree and betweenness centrality than other proteins in the network. In particular, the virulence factors tended to interact with each other and were enriched in two network modules. One of the modules mainly consisted of histidine kinases, response regulators, diguanylate cyclases and phosphodiesterases, which play important roles in two-component regulatory systems and the synthesis and degradation of cyclic-diGMP. Construction of the interspecies PPI network between A. veronii and its host Oreochromis niloticus revealed that the virulence factors interacted with homologous proteins in the host. Finally, the structures and interacting sites of the virulence factors during interaction with host proteins were predicted. CONCLUSIONS The findings here indicate that the virulence factors probably regulate the virulence of A. veronii by involving in signal transduction pathway and manipulate host biological processes by mimicking and binding competitively to host proteins. Our results give more insight into the pathogenesis of A. veronii and provides important information for designing targeted antibacterial drugs.
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Affiliation(s)
- Hong Li
- School of Life Sciences, Hainan University, Haikou, China
| | - Xiang Ma
- School of Life Sciences, Hainan University, Haikou, China
| | - Yanqiong Tang
- School of Life Sciences, Hainan University, Haikou, China
| | - Dan Wang
- Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Ziding Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhu Liu
- School of Life Sciences, Hainan University, Haikou, China.
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3
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Yang B, Chen C, Sun Y, Cao L, Zhang D, Sun W, Zhang L, Wang G, Shan X, Kang Y, Qian A. Comparative genomic analysis of different virulence strains reveals reasons for the increased virulence of Aeromonas veronii. J Fish Dis 2021; 44:11-24. [PMID: 33137224 DOI: 10.1111/jfd.13262] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
Aeromonas veronii is an important zoonotic and aquatic agent. More and more cases have shown that it has caused huge economic losses in the aquaculture industry in addition to threatening human health. But the reasons for the increasing virulence of A. veronii are still unclear. In order to further understand the reasons for the increased virulence of A. veronii, we conducted a comparative analysis of the genomes of A. veronii with different virulence. The analysis revealed that there are multiple virulence factors, such as those related to fimbriae, flagella, toxins, iron ion uptake systems and type II, type III and type VI secretion systems in the virulent strain TH0426 genome. And comparative analysis showed that there were two complete type III secretion systems (API1 and API2), of which the API2 and iron ion transport system were unique to the TH0426 strain. In addition, TH0426 strain also has unique functional gene clusters, which may play important roles in terms of resisting infection, adapting to different environments and genetic evolution. These particular virulence factors and gene clusters may be the important reasons for the increased virulence. These insights will provide a reference for the study of the pathogenesis of A. veronii.
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Affiliation(s)
- Bintong Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
- College of Life Science, Changchun Sci-Tech University, Changchun, China
| | - Chong Chen
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yufeng Sun
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Linan Cao
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Dongxing Zhang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Wuwen Sun
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Lei Zhang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Guiqin Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yuanhuan Kang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Aidong Qian
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Lab of Animal Production, Product Quality and Security, Joint Laboratory of Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun, China
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4
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Tao L, Kang Y, Zhang L, Shi Q, Li Y, Wu T, Qian A, Sun W, Shan X. Cadaverine reverse transporter (CadB protein) contributes to the virulence of Aeromonas veronii TH0426. Int Microbiol 2020; 23:489-499. [PMID: 31950405 DOI: 10.1007/s10123-020-00120-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 01/06/2020] [Accepted: 01/09/2020] [Indexed: 11/25/2022]
Abstract
Aeromonas veronii is one of the main pathogens causing sepsis and ulcer syndrome in freshwater fish. Analysis of the results of epidemiological investigations in recent years has revealed that the virulence of A. veronii and its tolerance to drugs have been increasing year by year. Currently, most of the research on A. veronii focuses on its isolation, identification, and drug susceptibility, whereas research on its virulence factors and pathogenesis mechanisms is relatively rare. In this study, we identified and obtained the highly expressed TH0426 cadaverine reverse transporter (CadB) of A. veronii. We used efficient suicide plasmid-mediated homologous recombination to delete the cadB gene in TH0426 and constructed a cadB deletion strain. The LD50 of ΔcadB was 93.2 times higher than that of TH0426 in zebrafish, the toxicity of ΔcadB was 9.5 times less than that of TH0426 in EPC cells, and the biofilm formation ability of ΔcadB was 5.6-fold greater than that of TH0426. In addition, motility detection results indicated that ΔcadB had lost its swimming ability. The results of flagellar staining and TEM demonstrated that ΔcadB shed the flagella. In summary, the virulence and adhesion of A. veronii TH0426 were significantly decreased by the deletion of cadB, which might provide a theoretical basis for research into A. veronii virulence factors.
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Affiliation(s)
- LuoTao Tao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - YuanHuan Kang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - Lei Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - Qiumei Shi
- Key Laboratory of Hebei Province Preventive Veterinary Medicine, Hebei Normal University of Science & Technology, Qinhuangdao, 066004, China
| | - Ying Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - Tonglei Wu
- Key Laboratory of Hebei Province Preventive Veterinary Medicine, Hebei Normal University of Science & Technology, Qinhuangdao, 066004, China
| | - Aidong Qian
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China
| | - WuWen Sun
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China.
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, Jilin, China.
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5
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Yang B, Song H, An D, Zhang D, Raza SHA, Wang G, Shan X, Qian A, Kang Y, Wang C. Functional Analysis of preA in Aeromonas veronii TH0426 Reveals a Key Role in the Regulation of Virulence and Resistance to Oxidative Stress. Int J Mol Sci 2019; 21:ijms21010098. [PMID: 31877791 PMCID: PMC6981600 DOI: 10.3390/ijms21010098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/14/2019] [Accepted: 12/18/2019] [Indexed: 01/12/2023] Open
Abstract
Aeromonas veronii is one of the main pathogens causing freshwater fish sepsis and ulcer syndrome. This bacterium has caused serious economic losses in the aquaculture industry worldwide, and it has become an important zoonotic and aquatic agent. However, little is known about the molecular mechanism of pathogenesis of A. veronii. In this study, we first constructed an unmarked mutant strain (ΔpreA) by generating an in-frame deletion of the preA gene, which encodes a periplasmic binding protein, to investigate its role in A. veronii TH0426. Our results showed that the motility and biofilm formation ability of ΔpreA were similar to those of the wild-type strain. However, the adhesion and invasion ability in epithelioma papulosum cyprini (EPC) cells were significantly enhanced (2.0-fold). Furthermore, the median lethal dose (LD50) of ΔpreA was 7.6-fold higher than that of the wild-type strain, which illustrates that the virulence of the mutant was significantly enhanced. This finding is also supported by the cytotoxicity test results, which showed that the toxicity of ΔpreA to EPC cells was enhanced 1.3-fold relative to the wild type. Conversely, tolerance test results showed that oxidative stress resistance of ΔpreA decreased 5.9-fold compared to with the wild-type strain. The results suggest that preA may negatively regulate the virulence of A. veronii TH0426 through the regulation of resistance to oxidative stress. These insights will help to further elucidate the function of preA and understand the pathogenesis of A. veronii.
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Affiliation(s)
- Bintong Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
- College of Life Science, Changchun Sci-Tech University, Shuangyang District, Changchun 130600, China
| | - Haichao Song
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
| | - Dingjie An
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
| | - Dongxing Zhang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
| | | | - Guiqin Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
| | - Aidong Qian
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
| | - Yuanhuan Kang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
- Correspondence: (Y.K.); (C.W.); Tel.: +86-0431-84533426 (Y.K. & C.W.)
| | - Chunfeng Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (B.Y.); (H.S.); (D.A.); (D.Z.); (G.W.); (X.S.); (A.Q.)
- Correspondence: (Y.K.); (C.W.); Tel.: +86-0431-84533426 (Y.K. & C.W.)
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6
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Tekedar HC, Kumru S, Blom J, Perkins AD, Griffin MJ, Abdelhamed H, Karsi A, Lawrence ML. Comparative genomics of Aeromonas veronii: Identification of a pathotype impacting aquaculture globally. PLoS One 2019; 14:e0221018. [PMID: 31465454 PMCID: PMC6715197 DOI: 10.1371/journal.pone.0221018] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 07/29/2019] [Indexed: 12/30/2022] Open
Abstract
Aeromonas veronii is a gram-negative species abundant in aquatic environments that causes disease in humans as well as terrestrial and aquatic animals. In the current study, 41 publicly available A. veronii genomes were compared to investigate distribution of putative virulence genes, global dissemination of pathotypes, and potential mechanisms of virulence. The complete genome of A. veronii strain ML09-123 from an outbreak of motile aeromonas septicemia in farm-raised catfish in the southeastern United States was included. Dissemination of A. veronii strain types was discovered in dispersed geographical locations. Isolate ML09-123 is highly similar to Chinese isolate TH0426, suggesting the two strains have a common origin and may represent a pathotype impacting aquaculture in both countries. Virulence of strain ML09-123 in catfish in a dose-dependent manner was confirmed experimentally. Subsystem category disposition showed the majority of genomes exhibit similar distribution of genomic elements. The type I secretion system (T1SS), type II secretion system (T2SS), type 4 pilus (T4P), and flagellum core elements are conserved in all A. veronii genomes, whereas the type III secretion system (T3SS), type V secretion system (T5SS), type VI secretion system (T6SS), and tight adherence (TAD) system demonstrate variable dispersal. Distribution of mobile elements is dependent on host and geographic origin, suggesting this species has undergone considerable genetic exchange. The data presented here lends insight into the genomic variation of A. veronii and identifies a pathotype impacting aquaculture globally.
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Affiliation(s)
- Hasan C. Tekedar
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America
| | - Salih Kumru
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America
| | - Jochen Blom
- Bioinformatics & Systems Biology, Justus-Liebig-University Giessen, Giessen, Hesse, Germany
| | - Andy D. Perkins
- Department of Computer Science and Engineering, Mississippi State University, Mississippi State, Mississippi, United States of America
| | - Matt J. Griffin
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America
- Thad Cochran National Warmwater Aquaculture Center, Stoneville, Mississippi State, United States of America
| | - Hossam Abdelhamed
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America
| | - Attila Karsi
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America
| | - Mark L. Lawrence
- College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America
- * E-mail:
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7
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Han C, Li Q, Liu J, Hao Z, Huang J, Zhang Y. Characterization, evolution, and expression analysis of TLR7 gene subfamily members in Mastacembelus armatus (Synbranchiformes: Mastacembelidae). Dev Comp Immunol 2019; 95:77-88. [PMID: 30742850 DOI: 10.1016/j.dci.2019.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/03/2019] [Accepted: 02/03/2019] [Indexed: 06/09/2023]
Abstract
TLR7 subfamily members are important pattern recognition receptors participating in the recognition of pathogen-associated molecular patterns. In this study, we successfully identified 3 members of TLR7 subfamily from the spiny eel Mastacembelus armatus (MaTLR7, MaTLR8 and MaTLR9). The amino acid sequence identities of MaTLR7 and MaTLR8 with Monopterus albus TLR7 were 87.2% and 76.5%, respectively and the identity of MaTLR9 with Seriola lalandi TLR9 was 74.7%. The phylogenetic analysis revealed MaTLRs showed close relationship to other species in Synbranchiformes or Perciformes. Quantitative real-time PCR analysis revealed that they were expressed in all tested tissues and higher expression was found in spleen or gill. After infection with Aeromonas veronii, expression of MaTLR7, MaTLR8 and MaTLR9 were all significantly downregulated in spleen and kidney. Evolutionary analysis suggested that the ancestral lineages of teleost TLR8 and TLR9 had been subject to positive selection pressures and multiple Maximum likelihood methods recovered 3 positively selected sites in teleost TLR7, 4 in TLR8 and 8 in TLR9. Domain distribution revealed most positively selected sites were located in leucine-rich repeat domain. Our results will contribute to better understanding the antibacterial mechanism of TLRs and their co-evolution with pathogens.
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Affiliation(s)
- Chong Han
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Qiang Li
- School of Life Sciences, Guangzhou University, Guangzhou, PR China
| | - Jinmei Liu
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Zhiqiang Hao
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China
| | - Jianrong Huang
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China.
| | - Yong Zhang
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, PR China.
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8
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Foysal MJ, Momtaz F, Ali MH, Siddik MAB, Chaklader MR, Rahman MM, Prodhan MSH, Cole A. Molecular characterization and interactome analysis of aerolysin (aer) gene from fish pathogen Aeromonas veronii: The pathogenicity inferred from sequence divergence and linked to histidine kinase (cheA). J Fish Dis 2019; 42:465-475. [PMID: 30734315 DOI: 10.1111/jfd.12954] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 10/17/2018] [Accepted: 10/17/2018] [Indexed: 06/09/2023]
Abstract
Aerolysin (aer) is one of the most important and abundant virulence factors in the infection of fish by Aeromonas veronii. A comprehensive study on the molecular characterization and pathogenicity of the aer gene from 34 A. veronii isolates from diseased carp and catfish was carried out and its interactome was analysed to observe the functional correlations between aer and other proteins within the A. veronii network. The PCR-based amplification of aer from the 34 isolates of A. veronii showed more aer-positive isolates from catfish with a high pathogenic potential in the in vivo challenge test than the carp fish. The analysis of aer gene sequence from challenged fish revealed significant sequence divergence according to the types and geographical distribution of the fish. The networking analysis of aer from the model A. veronii B565 revealed histidine kinase (cheA) as the most functional interacting partner. The study of the interaction between aer from the experimental A. veronii and cheA demonstrated that the A chain of cheA plays a more important role than the corresponding B chain during contact, and a linker sequence of 15 residues controlled the entire interaction process. Therefore, cheA could be an excellent drug target for controlling A. veronii infection of fish.
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Affiliation(s)
- Md Javed Foysal
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Farhana Momtaz
- Department of Microbiology, Chittagong University, Chittagong, Bangladesh
| | - Md Hazrat Ali
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Muhammad A B Siddik
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
| | - Md Reaz Chaklader
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
| | - Md Mahbubur Rahman
- Department of Biotechnology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | - Md Shamsul Haque Prodhan
- Department of Genetic Engineering and Biotechnology, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Anthony Cole
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia, Australia
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9
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Yang B, Zhang D, Wu T, Zhang Z, Raza SHA, Schreurs N, Zhang L, Yang G, Wang C, Qian A, Kang Y, Shan X. Maltoporin (LamB protein) contributes to the virulence and adhesion of Aeromonas veronii TH0426. J Fish Dis 2019; 42:379-389. [PMID: 30614537 DOI: 10.1111/jfd.12941] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 11/18/2018] [Accepted: 11/19/2018] [Indexed: 06/09/2023]
Abstract
Aeromonas veronii is one of the main pathogens causing freshwater fish sepsis and ulcer syndrome. More and more cases have shown that it has become an important zoonotic and aquatic agent. In this study, a A. veronii TH0426 mutant strain (ΔlamB) with an in-frame deletion removed nucleotides 10-1,296 of the lamB gene was firstly constructed to investigate its functions. The results showed that the LD50 value of the mutant ΔlamB to zebrafish and mice was 13.7-fold and 5.6-fold higher than those of the wild-type strain, respectively. The toxicity of wild-type strain to EPC cells was 2.1-fold and threefold higher than those of ∆lamB when infected for 1 and 2 hr. Furthermore, the ability of biofilm formation and the adhesion and invasion to EPC cells of ∆lamB significantly decreased for 5.6-fold and 1.8-fold separately. In addition, motility detection result indicated that ∆lamB lost the swimming ability. The results of flagellar staining and TEM demonstrated that the flagella of ∆lamB were shed. In general, the deletion of lamB gene caused a significant decrease in the virulence and adhesion of A. veronii TH0426, and it can be known that the lamB gene of A. veronii plays a crucial role in the pathogenesis.
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Affiliation(s)
- Bintong Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Dongxing Zhang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Tonglei Wu
- College of Animal Science and Technology, Key Laboratory of Preventive Veterinary Medicine, Hebei Normal University of Science and Technology, Changli, China
| | - Zhiqiang Zhang
- College of Animal Science and Technology, Key Laboratory of Preventive Veterinary Medicine, Hebei Normal University of Science and Technology, Changli, China
| | | | - Nicola Schreurs
- Animal Science, School of Agriculture and Environment, Massey University, Palmerston North, New Zealand
| | - Lei Zhang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Guilian Yang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Chunfeng Wang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Aidong Qian
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yuanhuan Kang
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Provincial Engineering Research Center of Animal Probiotics, Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
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10
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Dong HT, Techatanakitarnan C, Jindakittikul P, Thaiprayoon A, Taengphu S, Charoensapsri W, Khunrae P, Rattanarojpong T, Senapin S. Aeromonas jandaei and Aeromonas veronii caused disease and mortality in Nile tilapia, Oreochromis niloticus (L.). J Fish Dis 2017; 40:1395-1403. [PMID: 28383126 DOI: 10.1111/jfd.12617] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 01/04/2017] [Accepted: 01/04/2017] [Indexed: 05/20/2023]
Abstract
Diseases caused by motile aeromonads in freshwater fish have been generally assumed to be linked with mainly Aeromonas hydrophila while other species were probably overlooked. Here, we identified two isolates of non-A. hydrophila recovered from Nile tilapia exhibiting disease and mortality after exposed to transport-induced stress and subsequently confirmed their virulence in artificial infection. The bacterial isolates were identified as Aeromonas jandaei and Aeromonas veronii based on phenotypic features and homology of 16S rDNA. Experimental infection revealed that the high dose of A. jandaei (3.7 × 106 CFU fish-1 ) and A. veronii (8.9 × 106 CFU fish-1 ) killed 100% of experimental fish within 24 h, while a 10-fold reduction dose killed 70% and 50% of fish, respectively. When the challenge dose was reduced 100-fold, mortality of the fish exposed to A. jandaei and A. veronii decreased to 20% and 10%, respectively. The survivors from the latter dose administration were rechallenged with respective bacterial species. Lower mortality of rechallenged fish (0%-12.5%) compared to the control groups receiving a primary infection (37.5%) suggested that the survivors after primary infection were able to resist secondary infection. Fish exposed to either A. jandaei or A. veronii exhibited similar clinical signs and histological manifestation.
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Affiliation(s)
- H T Dong
- Department Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand
| | - C Techatanakitarnan
- Department Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - P Jindakittikul
- Department Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand
| | - A Thaiprayoon
- Department Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand
| | - S Taengphu
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - W Charoensapsri
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathum Thani, Thailand
| | - P Khunrae
- Department Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand
| | - T Rattanarojpong
- Department Microbiology, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand
| | - S Senapin
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, Bangkok, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathum Thani, Thailand
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11
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Zhu M, Wang XR, Li J, Li GY, Liu ZP, Mo ZL. Identification and virulence properties of Aeromonas veronii bv. sobria isolates causing an ulcerative syndrome of loach Misgurnus anguillicaudatus. J Fish Dis 2016; 39:777-781. [PMID: 26525163 DOI: 10.1111/jfd.12413] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/21/2015] [Accepted: 07/24/2015] [Indexed: 06/05/2023]
Affiliation(s)
- M Zhu
- College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
- College of Marine Science, Huaihai Institute of Technology, Lianyungang, China
| | - X R Wang
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - J Li
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
| | - G Y Li
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
| | - Z P Liu
- College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Z L Mo
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
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12
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Ghatak S, Blom J, Das S, Sanjukta R, Puro K, Mawlong M, Shakuntala I, Sen A, Goesmann A, Kumar A, Ngachan SV. Pan-genome analysis of Aeromonas hydrophila, Aeromonas veronii and Aeromonas caviae indicates phylogenomic diversity and greater pathogenic potential for Aeromonas hydrophila. Antonie Van Leeuwenhoek 2016; 109:945-56. [PMID: 27075453 DOI: 10.1007/s10482-016-0693-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 03/30/2016] [Indexed: 11/26/2022]
Abstract
Aeromonas species are important pathogens of fishes and aquatic animals capable of infecting humans and other animals via food. Due to the paucity of pan-genomic studies on aeromonads, the present study was undertaken to analyse the pan-genome of three clinically important Aeromonas species (A. hydrophila, A. veronii, A. caviae). Results of pan-genome analysis revealed an open pan-genome for all three species with pan-genome sizes of 9181, 7214 and 6884 genes for A. hydrophila, A. veronii and A. caviae, respectively. Core-genome: pan-genome ratio (RCP) indicated greater genomic diversity for A. hydrophila and interestingly RCP emerged as an effective indicator to gauge genomic diversity which could possibly be extended to other organisms too. Phylogenomic network analysis highlighted the influence of homologous recombination and lateral gene transfer in the evolution of Aeromonas spp. Prediction of virulence factors indicated no significant difference among the three species though analysis of pathogenic potential and acquired antimicrobial resistance genes revealed greater hazards from A. hydrophila. In conclusion, the present study highlighted the usefulness of whole genome analyses to infer evolutionary cues for Aeromonas species which indicated considerable phylogenomic diversity for A. hydrophila and hitherto unknown genomic evidence for pathogenic potential of A. hydrophila compared to A. veronii and A. caviae.
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Affiliation(s)
- Sandeep Ghatak
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India.
| | - Jochen Blom
- Bioinformatics and Systems Biology, Justus-Liebig-University Giessen, 35392, Giessen, Germany
| | - Samir Das
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India
| | - Rajkumari Sanjukta
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India
| | - Kekungu Puro
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India
| | | | - Ingudam Shakuntala
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India
| | - Arnab Sen
- Division of Animal Health, ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India
| | - Alexander Goesmann
- Bioinformatics and Systems Biology, Justus-Liebig-University Giessen, 35392, Giessen, Germany
| | - Ashok Kumar
- Division of Veterinary Public Health, Indian Veterinary Research Institute, Izatnagar, 243122, India
| | - S V Ngachan
- ICAR Research Complex for NEH Region, Umiam, Meghalaya, 793103, India
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