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ZBP1-induced Inflammation and REcognition of Z-Nucleic Acids

Project description

A key to immune response and therapy

Nucleic acids play a crucial role in triggering immune responses, adopting a left-handed Z-form under cellular stress. These Z-nucleic acids, including Z-RNA and Z-DNA, are detected by proteins ADAR1 and ZBP1. While ADAR1 dampens immune responses, ZBP1 triggers innate immunity, influencing antiviral defence, cancer immunity, and autoinflammation. Despite its significance, the mechanisms regulating ZBP1 activation remain unclear, hindering therapeutic advancements. Supported by the Marie Skłodowska-Curie Actions programme, the ZIREN project aims to address this gap by generating a ZBP1 agonist, validating its effectiveness in vivo, and identifying key regulators of ZBP1 signalling. This research will illuminate ZBP1’s activation pathways, paving the way for potential therapeutic strategies targeting ZBP1-driven conditions.

Objective

Nucleic acids are potent inducers of an immune response. Nucleic acids normally exist in a right-handed conformation. However, during conditions of cellular stress, nucleic acids can also adopt an unusual, left-handed “Z-form”. These Z-nucleic acids, including Z-RNA and Z-DNA, are sensed by two proteins: ADAR1 and ZBP1. While ADAR1 binding to Z-nucleic acids prevents immune responses, activation of ZBP1 results in the activation of an innate immune response. It is clear, that ZBP1 has important functions in antiviral defence, cancer immunity and during autoinflammation, yet the mechanisms that govern its activation and which pathways downstream of ZBP1 are activated, is poorly understood. Additionally, a big hurdle currently preventing the molecular characterisation of ZBP1 signalling, is the lack of a selective ZBP1 agonist.

I hypothesise that understanding the molecular mechanisms regulating ZBP1 activation and its downstream signalling pathways is fundamental for the development of therapeutics targeting this pathway. To test this hypothesis, I will address three major knowledge gaps in ZBP1 biology: (i) by purification of active ZBP1 complexes followed by nanopore sequencing and through solid-phase nucleic acid synthesis, I will generate a bona fide ZBP1 agonist, (ii) I will validate the ZBP1 agonist in vivo by testing its adjuvanticity in a mouse vaccination model, and (iii) by using a small compound and a genome-wide CRISPR/Cas9 knockout approaches, I will identify upstream and downstream regulators of ZBP1 signalling. Together, my proposed research plan will contribute to understanding the activation mechanisms of ZBP1, as well as its regulatory factors laying the foundation for understanding human ZBP1-driven (patho)physiology and development of therapeutic intervention.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

VIB VZW
Net EU contribution
€ 200 400,00
Address
SUZANNE TASSIERSTRAAT 1
9052 ZWIJNAARDE - GENT
Belgium
Region
Vlaams Gewest Prov. Oost-Vlaanderen Arr. Gent
Activity type
Research Organisations
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Total cost
No data