Yapici, Fatma Isil ORCID: 0009-0004-9298-8315
(2025).
Ferroptosis-induced Secretomes promote Macrophage priming.
PhD thesis, Universität zu Köln.
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Abstract
Cells undergoing regulated cell death communicate with the immune system by releasing various protein and non-protein secretomes. Ferroptosis, a recently identified iron-dependent form of regulated cell death characterized by extensive lipid peroxidation, involves membrane rupture. However, a detailed analysis of ferroptotic secretomes and their biological activity has been lacking. In this study, we used a multi-omics approach to create an atlas of secretomes induced by ferroptosis and discovered a novel role in macrophage priming. Proteins known to function as damage-associated molecular patterns (DAMPs) and innate immune system components, such as MIF, heat shock proteins (HSPs), and chaperones, were released from ferroptotic cells. Non-protein secretomes with inflammatory functions included oxylipins and metabolites from the tricarboxylic acid (TCA) cycle and methionine cycles. Notably, when bone marrow-derived macrophages (BMDMs) were incubated with ferroptotic supernatants, they underwent transcriptional reprogramming indicative of priming. Exposure to ferroptotic supernatants also enhanced cytokine production in response to LPS. These findings provide a comprehensive catalogue of ferroptosis-induced secretomes and reveal their role in macrophage priming, which has significant implications for modulating inflammatory processes.
Item Type: | Thesis (PhD thesis) | ||||||||||||
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URN: | urn:nbn:de:hbz:38-781542 | ||||||||||||
Date: | 2025 | ||||||||||||
Language: | English | ||||||||||||
Faculty: | Faculty of Mathematics and Natural Sciences Faculty of Medicine |
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Divisions: | CECAD - Cluster of Excellence Cellular Stress Responses in Aging-Associated Diseases | ||||||||||||
Subjects: | Medical sciences Medicine Natural sciences and mathematics Life sciences |
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Date of oral exam: | 18 September 2024 | ||||||||||||
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Refereed: | Yes | ||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/78154 |
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