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Verfasst von:Colucci, Silvia [VerfasserIn]   i
 Altamura, Sandro [VerfasserIn]   i
 Marques, Oriana [VerfasserIn]   i
 Dropmann, Anne [VerfasserIn]   i
 Horvat, Natalie [VerfasserIn]   i
 Müdder, Katja [VerfasserIn]   i
 Hammad, Seddik [VerfasserIn]   i
 Dooley, Steven [VerfasserIn]   i
 Muckenthaler, Martina [VerfasserIn]   i
Titel:Liver sinusoidal endothelial cells suppress bone morphogenetic protein 2 production in response to TGFβ pathway activation
Verf.angabe:Silvia Colucci, Sandro Altamura, Oriana Marques, Anne Dropmann, Natalie K. Horvat, Katja Müdder, Seddik Hammad, Steven Dooley, and Martina U. Muckenthaler
Jahr:2021
Umfang:15 S.
Fussnoten:Gesehen am 04.04.2023
Titel Quelle:Enthalten in: Hepatology
Ort Quelle:[Alphen aan den Rijn] : Wolters Kluwer Health, 1981
Jahr Quelle:2021
Band/Heft Quelle:74(2021), 4 vom: Okt., Seite 2186-2200
ISSN Quelle:1527-3350
Abstract:Background and Aims - TGFβ/bone morphogenetic protein (BMP) signaling in the liver plays a critical role in liver disease. Growth factors, such as BMP2, BMP6, and TGFβ1, are released from LSECs and signal in a paracrine manner to hepatocytes and hepatic stellate cells to control systemic iron homeostasis and fibrotic processes, respectively. The misregulation of the TGFβ/BMP pathway affects expression of the iron‐regulated hormone hepcidin, causing frequent iron overload and deficiency diseases. However, whether LSEC‐secreted factors can act in an autocrine manner to maintain liver homeostasis has not been addressed so far. - Approach and Results - We analyzed publicly available RNA‐sequencing data of mouse LSECs for ligand‐receptor interactions and identified members of the TGFβ family (BMP2, BMP6, and TGFβ1) as ligands with the highest expression levels in LSECs that may signal in an autocrine manner. We next tested the soluble factors identified through in silico analysis in optimized murine LSEC primary cultures and mice. Exposure of murine LSEC primary cultures to these ligands shows that autocrine responses to BMP2 and BMP6 are blocked despite high expression levels of the required receptor complexes partially involving the inhibitor FK‐506-binding protein 12. By contrast, LSECs respond efficiently to TGFβ1 treatment, which causes reduced expression of BMP2 through activation of activin receptor‐like kinase 5. - Conclusions - These findings reveal that TGFβ1 signaling is functionally interlinked with BMP signaling in LSECs, suggesting druggable targets for the treatment of iron overload diseases associated with deficiency of the BMP2‐regulated hormone hepcidin, such as hereditary hemochromatosis, β‐thalassemia, and chronic liver diseases.
DOI:doi:10.1002/hep.31900
URL:kostenfrei: Volltext: https://doi.org/10.1002/hep.31900
 kostenfrei: Volltext: https://journals.lww.com/hep/Fulltext/2021/10000/Liver_Sinusoidal_Endothelial_Cells_Suppress_Bone.32.aspx
 DOI: https://doi.org/10.1002/hep.31900
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1841215287
Verknüpfungen:→ Zeitschrift
 
 
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