Article ; Online: Lipocalin-2 induces mitochondrial dysfunction in renal tubular cells via mTOR pathway activation.
2023 Volume 42, Issue 9, Page(s) 113032
Abstract: Mitochondrial dysfunction is a critical process in renal epithelial cells upon kidney injury. While its implication in kidney disease progression is established, the mechanisms modulating it remain unclear. Here, we describe the role of Lipocalin-2 (LCN2) ...
Abstract | Mitochondrial dysfunction is a critical process in renal epithelial cells upon kidney injury. While its implication in kidney disease progression is established, the mechanisms modulating it remain unclear. Here, we describe the role of Lipocalin-2 (LCN2), a protein expressed in injured tubular cells, in mitochondrial dysfunction. We show that LCN2 expression decreases mitochondrial mass and function and induces mitochondrial fragmentation. Importantly, while LCN2 expression favors DRP1 mitochondrial recruitment, DRP1 inhibition antagonizes LCN2's effect on mitochondrial shape. Remarkably, LCN2 promotes mitochondrial fragmentation independently of its secretion or transport iron activity. Mechanistically, intracellular LCN2 expression increases mTOR activity, and rapamycin inhibits LCN2's effect on mitochondrial shape. In vivo, Lcn2 gene inactivation prevents mTOR activation and mitochondrial length decrease observed upon ischemia-reperfusion-induced kidney injury (IRI) in Lcn2 |
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MeSH term(s) | Mice ; Animals ; Lipocalin-2/genetics ; Lipocalin-2/metabolism ; Kidney/metabolism ; Reperfusion Injury/metabolism ; Epithelial Cells/metabolism ; TOR Serine-Threonine Kinases/metabolism ; Mitochondria/metabolism |
Chemical Substances | Lipocalin-2 ; TOR Serine-Threonine Kinases (EC 2.7.11.1) |
Language | English |
Publishing date | 2023-08-24 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 2649101-1 |
ISSN | 2211-1247 ; 2211-1247 |
ISSN (online) | 2211-1247 |
ISSN | 2211-1247 |
DOI | 10.1016/j.celrep.2023.113032 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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