Project description
Understanding the inflammatory processes of Barth syndrome
Barth syndrome (BTHS) is characterised by low unsaturated mitochondrial cardiolipin (CL) levels and increased saturated CL. This condition leads to chronic inflammation and heightened infection risk, contributing to patient mortality. Unsaturated CL normally inhibits caspase 4 (CASP4) and toll-like receptor 4 (TLR4), crucial for immune defence. However, the abnormal CL in BTHS does not inhibit CASP4 and activates TLR4, disrupting immune regulation and causing dysfunction. With the support of the Marie Skłodowska-Curie Actions programme, the CL-ImmunoDimmer project will investigate how depleting CL from monocytes and macrophages affects the activation of CASP4 and TLR4. It will also analyse inflammatory markers in patients with BTHS, focusing on the immune responses of neutrophils, monocytes and macrophages.
Objective
Barth Syndrome (BTHS) is a disease characterised by reduced production of unsaturated mitochondrial cardiolipin (CL) and increased production of abnormal CL with saturated chains. Chronic inflammation and increased vulnerability to infection are major contributors to mortality in BTHS patients. The connection between these immune dysfunctions and CL modifications is not understood. My research has shown that unsaturated CL inhibits caspase 4 (CASP4) and Toll-like Receptor 4 (TLR4). Moderate CASP4 and TLR4 activation by bacterial triggers is essential for antibacterial defence, while uncontrolled activation results in infection lethality and inflammatory disease. My preliminary data show that abnormal CL similar to the one found in BTHS patients does not inhibit CASP4, and saturated CL activates TLR4. These findings suggest that in health, unsaturated CL acts as a dimmer to fine-tune immune reactions, while in BTHS, this dimmer is compromised, resulting in immune dysfunction. To investigate this hypothesis, this proposal ideally combines my expertise in cardiolipin and mitochondria research with the host’s expertise in gene editing and live microscopy. Using well-established methodologies, we will deplete CL from monocytes and macrophages and study how this affects CASP4 and TLR4 activation. Moreover, I will characterise BTHS immune response through the analysis of inflammatory markers in patients’ plasma, and patients’ neutrophils, monocytes and macrophages CASP4 and TLR4 response. This will provide a deeper mechanistic understanding of inflammatory processes in both health and disease, potentially identifying CL, CASP4, and TLR4 as new targets for treating BTHS. While I will enhance the team’s multidisciplinary character and provide collaboration opportunities, I will be trained in cutting-edge techniques and get leadership and network opportunities crucial for my long-term goal of scientific independence.
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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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-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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(opens in new window) HORIZON-MSCA-2024-PF-01
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CB2 1TN CAMBRIDGE
United Kingdom
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