Abstract
Fn14 is a cell surface receptor with key functions in tissue homeostasis and injury but is also linked to chronic diseases. Despite its physiological and medical importance, the regulation of Fn14 signaling and turnover is only partly understood. Here, we demonstrate that Fn14 is cleaved within its transmembrane domain by the protease gamma-secretase, resulting in secretion of the soluble Fn14 ectodomain (sFn14). Inhibition of gamma-secretase in tumor cells reduced sFn14 secretion, increased full-length Fn14 at the cell surface, and enhanced TWEAK ligand-stimulated Fn14 signaling through the NF kappa B pathway, which led to enhanced release of the cytokine tumor necrosis factor. gamma-Secretase-dependent sFn14 release was also detected ex vivo in primary tumor cells from glioblastoma patients, in mouse and human plasma and was strongly reduced in blood from human cancer patients dosed with a gamma-secretase inhibitor prior to chimeric antigen receptor (CAR)-T-cell treatment. Taken together, our study demonstrates a novel function for gamma-secretase in attenuating TWEAK/Fn14 signaling and suggests the use of sFn14 as an easily measurable pharmacodynamic biomarker to monitor gamma-secretase activity in vivo.
| Dokumententyp: | Zeitschriftenartikel |
|---|---|
| Fakultät: | Medizin
Medizin > Munich Cluster for Systems Neurology (SyNergy) |
| Themengebiete: | 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit |
| ISSN: | 1757-4676 |
| Sprache: | Englisch |
| Dokumenten ID: | 115469 |
| Datum der Veröffentlichung auf Open Access LMU: | 02. Apr. 2024, 08:14 |
| Letzte Änderungen: | 24. Apr. 2024, 11:12 |
| DFG: | Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390857198 |
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