Project description
Guarding stem cells against viruses
Stem cells comprise a small population of cells that maintain tissue integrity by replenishing differentiated cells. Stem cells resist viral infection through unique mechanisms including a newly discovered pathway governed by protein aviD which deploys antiviral RNA interference against RNA viruses. Funded by the European Research Council, the STEMGUARD project aims to further investigate the role of the aviD protein and provide insight into this poorly understood antiviral defence method. Project findings extend beyond stem cell immunity and are expected to find applications in tumour biology by disclosing the role of aviD in guarding against transposable elements.
Objective
Stem cells guard tissue integrity by renewing the pool of differentiated cells, and must therefore be shielded from threats such as transposable elements or viruses. In that line, stem cells can largely resist viral infections, but they do so without deploying the antiviral pathways at play in differentiated cells. So, what guards the guardians? I recently discovered a stem cell-specific immune pathway, driven by a protein termed aviD (antiviral Dicer), which mounts an antiviral RNA interference (RNAi) response and thwarts RNA virus infection. This illustrates that stem cells implement specific defence mechanisms that are poorly understood, or unknown. My proposal aims at bridging the current knowledge gap in stem cell immunity. We will do so by investigating the role of the aviD pathway in vivo using an aviD knock-out mouse, as well as by unravelling the molecular regulation of the pathway (Aim 1). Stem cells demise can additionally be provoked by the expression of transposable elements (TEs). Converging evidence suggests that aviD and the RNAi pathway may play a second defensive role in shielding uninfected stem cells from TE expression, which we will explore in Aim 2. Because cancer is characterised by a stemness transcriptional program, aviD may similarly control TEs in tumour cells. We will study aviD expression in various tumour models and assess its role in controlling TEs. This is of special interest because awakening TE expression in cancer is being leveraged by new therapeutic approaches in multiple malignancies. Similarly, we will explore if inhibiting aviD and the RNAi pathway could have an antitumour effect (Aim 2). Finally, I hypothesize that stem cells are protected by additional, unknown antiviral pathways, which we aim to identify and characterise using new genome-scale approaches (Aim 3). Overall, this proposal aims at unveiling new biology in stem cell immunity as well as developing clinical applications in the field of antitumour therapy.
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.
- natural sciences biological sciences microbiology virology
- natural sciences biological sciences biochemistry biomolecules proteins
- medical and health sciences clinical medicine oncology
- natural sciences biological sciences genetics RNA
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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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HORIZON.1.1 - European Research Council (ERC)
MAIN PROGRAMME
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Topic(s)
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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.
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.
HORIZON-ERC - HORIZON ERC Grants
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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) ERC-2022-STG
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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.
75231 Paris
France
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