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Decisive early crosstalk in bone repair: vessel, nerve and stem cell interactions in healthy and Neurofibromatosis type 1 conditions

Project description

Understanding the role of stem cells during bone healing

Most tissues contain somatic stem cells which are crucial for regeneration. Skeletal stem progenitor cells (SSPCs) contribute to bone healing after fracture, contributing to cartilage and bone formation. Successful healing also requires the coordinated development of new blood vessels and nerves within the bone microenvironment. Disruption of these processes can lead to fibrosis and impaired repair. With the support of the Marie Skłodowska-Curie Actions programme, the CROSSBONE project will investigate the regulation of SSPCs in the niche and its role in healing. Researchers will employ a range of pathological models of healing to study how angiogenesis, nerve regeneration, and SSPC fate decisions are coordinated. Project findings will improve our understanding of fibrosis-related bone disorders and guide future therapies.

Objective

Bone fractures are common traumatic injuries and a significant global health challenge. Successful healing depends on skeletal stem progenitor cells (SSPCs) producing cartilage and bone via a complex process. New vessel and nerve formations in the bone microenvironment are also crucial to determine the healing outcome. When disrupted, bone healing is impaired and fibrosis emerges, impacting patients’ life. In current research on bone repair disorders, there is a lack of understanding of initial triggers influencing cell differentiation and healing outcomes. In Neurofibromatosis type 1 (NF1), the host laboratory identified an early SSPC shift from a chondrogenic fate to a fibrotic fate promoting fibrosis instead of bone formation. Analysing the factors causing this cell fate shift is essential to understand altered mechanisms in pathological conditions. CROSSBONE will address these needs by unveiling the SSPC niche initial regulatory mechanisms influencing bone healing and fibrosis. It will analyse healthy fracture healing, detailing angiogenesis, reinnervation and SSPC interactions. Then I will investigate NF1 pathological mechanisms, focusing on this crosstalk and how it can disrupt healing. The project will use complementary in vitro and in vivo experiments, single-cell transcriptomics, and advanced tools to dissect spatial-temporal crosstalk after fractures. These interdisciplinary methodologies will provide a comprehensive understanding of bone healing in healthy and pathological conditions. CROSSBONE will enhance my professional development, boosting independence and competitiveness for my future career. The findings will potentially impact the management of diseases where fibrosis influences bone healing, benefiting scientists, clinicians and patients in related fields. Integrating various disciplines and techniques, CROSSBONE aims to contribute pioneering insights into bone healing and fibrosis, supporting new therapeutic strategies.

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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

INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE
Net EU contribution
€ 226 420,56
Address
RUE DE TOLBIAC 101
75654 Paris
France
Region
Ile-de-France Ile-de-France Paris
Activity type
Research Organisations
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Total cost
No data