Objective
The human pathogen Salmonella remains a significant ongoing threat to worldwide public health. Although major advances have been made with respect to the understanding of Salmonella-specific host pathogen interaction, the nature and the regulation of bacterial virulence effectors directly responsible for the host response remains elusive. Quorum sensing constitutes a bacterial cell-cell communication system in which bacterial secreted auto-inducing molecules signal and trigger changes in gene expression. Such systems can act as global regulators of virulence like in Staphylococcus aureus. In Salmonella typhimurium, the quorum sensing auto-inducer AI-2 is the final product in a biosynthetic pathway involving the AI-2 synthesis encoded by the luxS gene. Recent reports indicate that AI-2 plays a role in the coordination of virulence in Escherichia coli and Streptococcus pyogenes . However , the role of quorum sensing mechanisms in Salmonella pathogenicity has not been investigated yet. With this project, I intend to explore the role of AI-2 in regulating Salmonella virulence. A luxS-null mutant will be constructed and compared with the parent in its ability to infect and colonize the host by using cultured human epithelial intestinal cells, cultured mouse macrophages and a mouse model of systemic infection. Effects of AI-2 in regulating expression of Salmonella pathogenicity islands (SPI-1 and SPI-2)-encoded virulence factors including the components of the type III secretion systems will be analyzed in vitro and in vivo. Finally, the function of AI-2 as a regulator involved directly in infection and stimulation of host signaling cascades will be studied.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.