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| Verfasst von: | Reiners-Koch, Philipp-Sebastian [VerfasserIn]  |
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| | Sandorski, Kajetan [VerfasserIn] |
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| | Heil, Joschka [VerfasserIn] |
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| | Schmid, Christian David [VerfasserIn] |
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| | Kürschner, Sina Wietje [VerfasserIn] |
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| | Hoffmann, Johannes [VerfasserIn] |
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| | Winkler, Manuel [VerfasserIn] |
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| | Staniczek, Theresa [VerfasserIn] |
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| | Torre, Carolina de la [VerfasserIn] |
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| | Sticht, Carsten [VerfasserIn] |
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| | Schledzewski, Kai [VerfasserIn] |
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| | Taketo, Makoto Mark [VerfasserIn] |
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| | Trogisch, Felix [VerfasserIn] |
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| | Heineke, Jörg [VerfasserIn] |
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| | Géraud, Cyrill [VerfasserIn] |
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| | Goerdt, Sergij [VerfasserIn] |
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| | Olsavszky, Victor [VerfasserIn] |
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| Titel: | Imbalanced activation of Wnt-/β-Catenin-signaling in liver endothelium alters normal sinusoidal differentiation |
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| Verf.angabe: | Philipp-Sebastian Koch, Kajetan Sandorski, Joschka Heil, Christian D. Schmid, Sina W. Kürschner, Johannes Hoffmann, Manuel Winkler, Theresa Staniczek, Carolina de la Torre, Carsten Sticht, Kai Schledzewski, Makoto Mark Taketo, Felix A. Trogisch, Joerg Heineke, Cyrill Géraud, Sergij Goerdt, Victor Olsavszky |
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| E-Jahr: | 2021 |
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| Jahr: | 2021 Sept 29 |
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| Umfang: | 18 S. |
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| Fussnoten: | Gesehen am 20.10.2021 |
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| Titel Quelle: | Enthalten in: Frontiers in physiology |
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| Ort Quelle: | Lausanne : Frontiers Research Foundation, 2007 |
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| Jahr Quelle: | 2021 |
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| Band/Heft Quelle: | 12(2021), Artikel-ID 722394 |
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| ISSN Quelle: | 1664-042X |
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| Abstract: | Endothelial wingless-related integration site (Wnt)-/β-catenin signaling is a key regulator of the tightly sealed blood-brain barrier. In the hepatic vascular niche angiokine-mediated Wnt signaling was recently identified as an important regulator of hepatocyte function, including the determination of final adult liver size, liver regeneration, and metabolic liver zonation. Within the hepatic vasculature, the liver sinusoidal endothelial cells (LSECs) are morphologically unique and functionally specialized microvascular endothelial cells (ECs). Pathological changes of LSECs are involved in chronic liver diseases, hepatocarcinogenesis, and liver metastasis. To comprehensively analyze the effects of endothelial Wnt-/β-catenin signaling in the liver, we used endothelial subtype-specific Clec4g-iCre mice to generate hepatic ECs with overexpression of Ctnnb1. In the resultant Clec4g-iCre tg/wt ;Ctnnb1(Ex3) fl/wt (Ctnnb1 OE-EC ) mice, activation of endothelial Wnt-/β-catenin signaling resulted in sinusoidal transdifferentiation with disturbed endothelial zonation, that is, loss of midzonal LSEC marker lymphatic vessel endothelial hyaluronic acid receptor 1 (Lyve1) and enrichment of continuous EC genes, such as cluster of differentiation (CD)34 and Apln. Notably, gene set enrichment analysis revealed overrepresentation of brain endothelial transcripts. Activation of endothelial Wnt-/β-catenin signaling did not induce liver fibrosis or alter metabolic liver zonation, but Ctnnb1 OE-EC mice exhibited significantly increased plasma triglyceride concentrations, while liver lipid content was slightly reduced. Ctnnb1 overexpression in arterial ECs of the heart has been reported previously to cause cardiomyopathy. As Clec4g-iCre is active in a subset of cardiac ECs, it was not unexpected that Ctnnb1 OE-EC mice showed reduced overall survival and cardiac dysfunction. Altogether, balanced endothelial Wnt-/β-catenin signaling in the liver is required for normal LSEC differentiation and for maintenance of normal plasma triglyceride levels. |
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| DOI: | doi:10.3389/fphys.2021.722394 |
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| URL: | Volltext: https://doi.org/10.3389/fphys.2021.722394 |
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| | DOI: https://doi.org/10.3389/fphys.2021.722394 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | endothelial cells |
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| | liver |
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| | liver sinusoidal endothelial cells |
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| | mice |
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| | triglycerides |
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| K10plus-PPN: | 1774575248 |
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| Verknüpfungen: | → Zeitschrift |
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| Lokale URL UB: |  Zum Volltext |
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Imbalanced activation of Wnt-/β-Catenin-signaling in liver endothelium alters normal sinusoidal differentiation / Reiners-Koch, Philipp-Sebastian [VerfasserIn]; 2021 Sept 29 (Online-Ressource)
