Project description
Bacterial metabolic interactions in the vagina
Bacterial vaginosis (BV) is a syndrome characterised by a shift in vaginal microbiota composition from lactic acid-producing bacteria to other bacterial species. BV imposes a significant and hidden burden on a large number of women worldwide. Vaginal secretions in women suffering from BV exhibit high levels of sugar molecules known as sialic acids (SA), which are used by some bacteria as a nutrient source and a way to escape host immunity. The key objective of the EU-funded MINERVA project is to study SA metabolism in BV-associated bacteria from a genetic, clinical and evolutionary perspective, using laboratory models as well as clinical samples. We propose to identify SA metabolic genes and their interactions within bacterial species networks, with the aim of reducing the burden of BV, the associated reproductive complications and the risk of contracting sexually transmitted infections.
Objective
Bacterial vaginosis (BV) is a polymicrobial syndrome that modifies vaginal secretions and increases risks of reproductive complications and most sexually transmissible infections. This syndrome is associated with a shift in vaginal microbiota composition from lactic-acid producing bacteria to specific bacterial communities. Concomitant with such shift, sialidases can be detected in vaginal secretions where they release sialic acids (SA), sugar molecules that some bacteria can use as a nutrient source and to escape host’s immunity. While the presence of sialidases is used as a BV diagnosis method, we still know little about SA metabolism in the species associated with BV, and even less about SA-related interactions in the community.
The proposed project will directly address this question with the ultimate aim of understanding the role of SA metabolism in the transition from health to disease. I will focus my research on the three most prevalent BV-associated bacteria: Gardnerella vaginalis, Prevotella bivia and Atopobium vaginae. First, I will investigate the genomic organization and distribution of the genes involved in SA metabolism. Second, I will link these genotypes to phenotypes by experimentally assessing the expression of those genes in clinical samples from BV-positive and negative women. Third, I will assess the evolutionary stability of SA metabolism genes and bring insight into the respective roles of SA availability and host’s immune system in the evolution of bacterial SA metabolism. Finally, I will create ex-vivo minimal model communities of BV bacteria and examine the ecological interactions between species.
By going beyond a taxonomic description to better understand eco-evolutionary functioning, this project will expand our view of the BV microbiome both at the species level, examining in particular intraspecies diversity in genetic composition and expression, and at the community level through the investigation of SA-related interactions.
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.
- medical and health sciences basic medicine immunology
- natural sciences biological sciences microbiology bacteriology bacteriomes
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
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.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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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.
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.
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.
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2019
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
75794 PARIS
France
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.