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Junb regulates arterial contraction capacity, cellular contractility, and motility via its target Myl9 in mice

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Cellular contractility and, thus, the ability to alter cell shape are prerequisites for a number of important biological processes such as cytokinesis, movement, differentiation, and substrate adherence. The contractile capacity of vascular smooth muscle cells (VSMCs) is pivotal for the regulation o...

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Hauptverfasser: Licht, Alexander (VerfasserIn) , Nübel, Tobias (VerfasserIn) , Feldner, Anja (VerfasserIn) , Jurisch-Yaksi, Nathalie (VerfasserIn) , Marcello, Marco (VerfasserIn) , Demicheva, Elena (VerfasserIn) , Hu, Jun-Hao (VerfasserIn) , Hartenstein, Bettina (VerfasserIn) , Augustin, Hellmut (VerfasserIn) , Hecker, Markus (VerfasserIn) , Angel, Peter (VerfasserIn) , Korff, Thomas (VerfasserIn) , Schorpp-Kistner, Marina (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: June 14, 2010
In: The journal of clinical investigation
Year: 2010, Jahrgang: 120, Heft: 7, Pages: 2307-2318
ISSN:1558-8238
DOI:10.1172/JCI41749
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1172/JCI41749
Verlag, lizenzpflichtig, Volltext: https://www.jci.org/articles/view/41749
Volltext
Verfasserangaben:Alexander H. Licht, Tobias Nübel, Anja Feldner, Nathalie Jurisch-Yaksi, Marco Marcello, Elena Demicheva, Jun-Hao Hu, Bettina Hartenstein, Hellmut G. Augustin, Markus Hecker, Peter Angel, Thomas Korff, and Marina Schorpp-Kistner
Beschreibung
Zusammenfassung:Cellular contractility and, thus, the ability to alter cell shape are prerequisites for a number of important biological processes such as cytokinesis, movement, differentiation, and substrate adherence. The contractile capacity of vascular smooth muscle cells (VSMCs) is pivotal for the regulation of vascular tone and thus blood pressure and flow. Here, we report that conditional ablation of the transcriptional regulator Junb results in impaired arterial contractility in vivo and in vitro. This was exemplified by resistance of Junb-deficient mice to DOCA-salt–induced volume-dependent hypertension as well as by a decreased contractile capacity of isolated arteries. Detailed analyses of Junb-deficient VSMCs, mouse embryonic fibroblasts, and endothelial cells revealed a general failure in stress fiber formation and impaired cellular motility. Concomitantly, we identified myosin regulatory light chain 9 (Myl9), which is critically involved in actomyosin contractility and stress fiber assembly, as a Junb target. Consistent with these findings, reexpression of either Junb or Myl9 in Junb-deficient cells restored stress fiber formation, cellular motility, and contractile capacity. Our data establish a molecular link between the activator protein–1 transcription factor subunit Junb and actomyosin-based cellular motility as well as cellular and vascular contractility by governing Myl9 transcription.
Beschreibung:Gesehen am 14.03.2023
Beschreibung:Online Resource
ISSN:1558-8238
DOI:10.1172/JCI41749

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