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Xia F, Xu P, Zhang B, Zhang Y, Liu X, Ma Y, Zhang Y, Wang Q, Shao S. Identification of a novel transcriptional regulator, CorR, for copper stress response in Edwardsiella piscicida. Appl Environ Microbiol 2023; 89:e0089923. [PMID: 37732742 PMCID: PMC10617541 DOI: 10.1128/aem.00899-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 07/30/2023] [Indexed: 09/22/2023] Open
Abstract
Copper plays a vital role in the host-pathogen interface, potentially making components of the bacterial copper response suitable targets for the development of innovative antimicrobial strategies. The anti-copper arsenal of intracellular pathogens has expanded as an adaptation to survive copper toxicity in order to escape intracellular killing by the host immune system. Herein, we employed transposon insertion sequencing to investigate the genetic mechanisms underlying the survival of Edwardsiella piscicida under copper stress. A novel transcriptional regulator, ETAE_2324 (named CorR), was identified to participate in the response to copper ions by controlling the expression of copA, the core component of cytoplasmic copper homeostasis. Furthermore, CorR regulated the expression of virulent determinant eseB, influencing the in vivo colonization of E. piscicida. Collectively, our results contribute to the comprehension of the underlying mechanism of the adaption of intracellular pathogens to copper stress during bacterial infections.IMPORTANCECopper ions play a pivotal role in the interaction between bacteria and the host during infection. The host's innate immune system employs copper ions for their bactericidal properties, thereby making bacterial copper tolerance a crucial determinant of virulence. Edwardsiella piscicida, a significant marine pathogen, has caused substantial losses in the global aquaculture industry. To comprehensively investigate how E. piscicida responds to copper stress, we utilized transposon insertion sequencing to explore genes associated with copper tolerance in culture media containing different concentrations of copper ions. A novel transcriptional regulator, CorR, was identified to respond to copper ions and regulates the expression of crucial components of copper homeostasis CopA, along with the essential virulence factor EseB. These findings offer valuable insights into the underlying mechanisms that govern bacterial copper tolerance and present novel perspectives for the development of vaccines and therapeutic strategies targeting E. piscicida.
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Affiliation(s)
- Feng Xia
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Pengfei Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Boya Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yibei Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory of Aquatic Animal Diseases of MOA, Shanghai, China
| | - Xiaohong Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory of Aquatic Animal Diseases of MOA, Shanghai, China
| | - Yue Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory of Aquatic Animal Diseases of MOA, Shanghai, China
| | - Yuanxing Zhang
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory of Aquatic Animal Diseases of MOA, Shanghai, China
| | - Qiyao Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory of Aquatic Animal Diseases of MOA, Shanghai, China
| | - Shuai Shao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Shanghai Engineering Research Center of Maricultured Animal Vaccines, Shanghai, China
- Laboratory of Aquatic Animal Diseases of MOA, Shanghai, China
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Mao Q, Jiang J, Wu X, Ma Y, Zhang Y, Zhao Y, Zhang Y, Wang Q. Bifunctional alcohol/aldehyde dehydrogenase AdhE controls phospho-transferase system sugar utilization and virulence gene expression by interacting PtsH in Edwardsiella piscicida. Microbiol Res 2022; 260:127018. [DOI: 10.1016/j.micres.2022.127018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 03/26/2022] [Accepted: 03/29/2022] [Indexed: 10/18/2022]
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Ortiz-Severín J, Travisany D, Maass A, Cambiazo V, Chávez FP. Global Proteomic Profiling of Piscirickettsia salmonis and Salmon Macrophage-Like Cells during Intracellular Infection. Microorganisms 2020; 8:microorganisms8121845. [PMID: 33255149 PMCID: PMC7760863 DOI: 10.3390/microorganisms8121845] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/18/2020] [Accepted: 09/18/2020] [Indexed: 01/11/2023] Open
Abstract
Piscirickettsiasalmonis is an intracellular bacterial fish pathogen that causes piscirickettsiosis, a disease with numerous negative impacts in the Chilean salmon farming industry. Although transcriptomic studies of P. salmonis and its host have been performed, dual host–pathogen proteomic approaches during infection are still missing. Considering that gene expression does not always correspond with observed phenotype, and bacteriological culture studies inadequately reflect infection conditions, to improve the existing knowledge for the pathogenicity of P. salmonis, we present here a global proteomic profiling of Salmon salar macrophage-like cell cultures infected with P. salmonis LF-89. The proteomic analyses identified several P. salmonis proteins from two temporally different stages of macrophages infection, some of them related to key functions for bacterial survival in other intracellular pathogens. Metabolic differences were observed in early-stage infection bacteria, compared to late-stage infections. Virulence factors related to membrane, lipopolysaccharide (LPS) and surface component modifications, cell motility, toxins, and secretion systems also varied between the infection stages. Pilus proteins, beta-hemolysin, and the type VI secretion system (T6SS) were characteristic of the early-infection stage, while fimbria, upregulation of 10 toxins or effector proteins, and the Dot/Icm type IV secretion system (T4SS) were representative of the late-infection stage bacteria. Previously described virulence-related genes in P. salmonis plasmids were identified by proteomic assays during infection in SHK-1 cells, accompanied by an increase of mobile-related elements. By comparing the infected and un-infected proteome of SHK-1 cells, we observed changes in cellular and redox homeostasis; innate immune response; microtubules and actin cytoskeleton organization and dynamics; alteration in phagosome components, iron transport, and metabolism; and amino acids, nucleoside, and nucleotide metabolism, together with an overall energy and ATP production alteration. Our global proteomic profiling and the current knowledge of the P. salmonis infection process allowed us to propose a model of the macrophage–P. salmonis interaction.
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Affiliation(s)
- Javiera Ortiz-Severín
- Laboratorio de Microbiología de Sistemas, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile;
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile, Santiago 7830490, Chile;
- Fondap Center for Genome Regulation (Fondap 15090007), Universidad de Chile, Santiago 8370415, Chile; (D.T.); (A.M.)
| | - Dante Travisany
- Fondap Center for Genome Regulation (Fondap 15090007), Universidad de Chile, Santiago 8370415, Chile; (D.T.); (A.M.)
- Centro de Modelamiento Matemático (AFB170001) and Departamento de Ingeniería Matemática, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile and UMI-CNRS 2807, Santiago 8370415, Chile
| | - Alejandro Maass
- Fondap Center for Genome Regulation (Fondap 15090007), Universidad de Chile, Santiago 8370415, Chile; (D.T.); (A.M.)
- Centro de Modelamiento Matemático (AFB170001) and Departamento de Ingeniería Matemática, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile and UMI-CNRS 2807, Santiago 8370415, Chile
| | - Verónica Cambiazo
- Laboratorio de Bioinformática y Expresión Génica, Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile, Santiago 7830490, Chile;
- Fondap Center for Genome Regulation (Fondap 15090007), Universidad de Chile, Santiago 8370415, Chile; (D.T.); (A.M.)
| | - Francisco P. Chávez
- Laboratorio de Microbiología de Sistemas, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile;
- Correspondence:
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