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Local and systemic mechanisms for metabolic inflammation chronicity

Project description

Holistic investigation of metabolic inflammation chronicity mechanisms

Chronic inflammation (persistent overactivation of the body's immune response) underlies many serious diseases and is associated with metabolic syndrome in obesity. The ERC-funded LOSYSINCHRON project will investigate why metabolic inflammation becomes chronic, addressing both local and systemic mechanisms simultaneously for the first time. Furthermore, it will focus on its recent discovery that trained innate immunity is initiated in the bone marrow. Specifically, LOSYSINCHRON will study how inflammatory cells accumulate in fat tissue and liver when natural resolution processes fail, and how hematopoietic progenitors in the bone marrow become ‘mis-trained’ to perpetually overproduce cells with higher potential to promote metabolic inflammation. Insights are expected to shed new light on metabolic inflammation chronicity and open new therapeutic avenues for metabolic-inflammatory diseases.

Objective

Chronic inflammation underlies several diseases and is a common basis of multiple comorbidities. In obesity, chronic inflammation of the adipose tissue (AT) and liver contributes to the metabolic syndrome and related metabolic-inflammatory pathologies. Here, we propose a thorough and innovative approach to revolutionize understanding of metabolic inflammation chronicity. We will address both local (at the respective tissue level) and systemic mechanisms, involving the novel principle of trained innate immunity (TII) and inflammatory adaptation of the bone marrow (BM). (i) Local: In chronic metabolic inflammation, there is an imbalance between chronic accumulation/activation of inflammatory cells and resolution of inflammation (RoI) in favor of the former. Based on our recent findings regarding integrin-dependent chronic macrophage retention in the obese AT and that Developmental endothelial locus-1 promotes RoI, we will here identify novel pathways towards counter-acting chronicity of metabolic inflammation and facilitating its resolution and test their therapeutic efficacy. (ii) Systemic: Systemic metabolic/inflammatory feedback to the BM may trigger long-term adaptations of hematopoietic progenitors, fueling a feed-forward loop of perpetual inflammation. Following our discovery that TII is initiated in the BM, we will pursue the hypothesis that maladaptive training of BM progenitors in obesity facilitates metabolic inflammation chronicity, via generation of myeloid cells with higher potential for tissue accumulation and inflammatory activation, and promotes development of obesity-related inflammatory comorbidities. Despite apparent links, local and systemic mechanisms are mostly studied independently of each other rather than through an integrative approach, which will be followed here for the first time. Our proposal will lead to breakthrough concepts in metabolic inflammation chronicity and to novel therapeutic strategies for metabolic-inflammatory pathologies.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

(opens in new window) ERC-2021-ADG

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Host institution

TECHNISCHE UNIVERSITAET DRESDEN
Net EU contribution
€ 2 493 275,00
Address
HELMHOLTZSTRASSE 10
01069 Dresden
Germany
Region
Sachsen Dresden Dresden, Kreisfreie Stadt
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 2 493 275,00

Beneficiaries (1)