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  1. AU="Frohn, Marina"
  2. AU="Blaksley, C"
  3. AU="Heri Hermasyah"
  4. AU="Charlier, Filip"
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  1. Buch ; Dissertation / Habilitation: Bedeutung des Aktin- und Myosinbindeproteins Caldesmon für die pränatale Entwicklung der Maus

    Frohn, Marina / Pfitzer, Gabriele / Wodarz, Andreas

    2020  

    Körperschaft Zentrum Physiologie und Pathophysiologie
    Verfasserangabe vorgelegt von Marina Frohn ; 1. Gutachterin: Universitätsprofessorin Dr. med. G. Pfitzer, 2. Gutachter: Universitätsprofessor Dr. rer. nat. A. Wodarz ; aus dem Zentrum für Physiologie und Pathophysiologie der Universität zu Köln, Institut für Vegetative Physiologie
    Thema/Rubrik (Code) 610
    Sprache Deutsch
    Umfang 135 Seiten, Illustrationen, Diagramme
    Erscheinungsort Köln
    Erscheinungsland Deutschland
    Dokumenttyp Buch ; Dissertation / Habilitation
    Dissertation / Habilitation Dissertation, Universität zu Köln, 2021
    HBZ-ID HT020989323
    Datenquelle Katalog ZB MED Medizin, Gesundheit

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  2. Artikel: Dual thick and thin filament linked regulation of stretch- and L-NAME-induced tone in young and senescent murine basilar artery.

    Lubomirov, Lubomir T / Schroeter, Mechthild M / Hasse, Veronika / Frohn, Marina / Metzler, Doris / Bust, Maria / Pryymachuk, Galyna / Hescheler, Jürgen / Grisk, Olaf / Chalovich, Joseph M / Smyth, Neil R / Pfitzer, Gabriele / Papadopoulos, Symeon

    Frontiers in physiology

    2023  Band 14, Seite(n) 1099278

    Abstract: Stretch-induced vascular tone is an important element of autoregulatory adaptation of cerebral vasculature to maintain cerebral flow constant despite changes in perfusion pressure. Little is known as to the regulation of tone in senescent basilar ... ...

    Abstract Stretch-induced vascular tone is an important element of autoregulatory adaptation of cerebral vasculature to maintain cerebral flow constant despite changes in perfusion pressure. Little is known as to the regulation of tone in senescent basilar arteries. We tested the hypothesis, that thin filament mechanisms in addition to smooth muscle myosin-II regulatory-light-chain-(MLC
    Sprache Englisch
    Erscheinungsdatum 2023-03-28
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2564217-0
    ISSN 1664-042X
    ISSN 1664-042X
    DOI 10.3389/fphys.2023.1099278
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Caldesmon ablation in mice causes umbilical herniation and alters contractility of fetal urinary bladder smooth muscle.

    Pütz, Sandra / Barthel, Lisa Sophie / Frohn, Marina / Metzler, Doris / Barham, Mohammed / Pryymachuk, Galyna / Trunschke, Oliver / Lubomirov, Lubomir T / Hescheler, Jürgen / Chalovich, Joseph M / Neiss, Wolfram F / Koch, Manuel / Schroeter, Mechthild M / Pfitzer, Gabriele

    The Journal of general physiology

    2021  Band 153, Heft 7

    Abstract: The actin-, myosin-, and calmodulin-binding protein caldesmon (CaD) is expressed in two splice isoforms: h-CaD, which is an integral part of the actomyosin domain of smooth muscle cells, and l-CaD, which is widely expressed and is involved in many ... ...

    Abstract The actin-, myosin-, and calmodulin-binding protein caldesmon (CaD) is expressed in two splice isoforms: h-CaD, which is an integral part of the actomyosin domain of smooth muscle cells, and l-CaD, which is widely expressed and is involved in many cellular functions. Despite extensive research for many years, CaD's in vivo function has remained elusive. To explore the role of CaD in smooth muscle contraction in vivo, we generated a mutant allele that ablates both isoforms. Heterozygous animals were viable and had a normal life span, but homozygous mutants died perinatally, likely because of a persistent umbilical hernia. The herniation was associated with hypoplastic and dysmorphic abdominal wall muscles. We assessed mechanical parameters in isometrically mounted longitudinal strips of E18.5 urinary bladders and in ring preparations from abdominal aorta using wire myography. Ca2+ sensitivity was higher and relaxation rate was slower in Cald1-/- compared with Cald1+/+ skinned bladder strips. However, we observed no change in the content and phosphorylation of regulatory proteins of the contractile apparatus and myosin isoforms known to affect these contractile parameters. Intact fibers showed no difference in actin and myosin content, regardless of genotype, although KCl-induced force tended to be lower in homozygous and higher in heterozygous mutants than in WTs. Conversely, in skinned fibers, myosin content and maximal force were significantly lower in Cald1-/- than in WTs. In KO abdominal aortas, resting and U46619 elicited force were lower than in WTs. Our results are consistent with the notion that CaD impacts smooth muscle function dually by (1) acting as a molecular brake on contraction and (2) maintaining the structural integrity of the contractile machinery. Most importantly, CaD is essential for resolution of the physiological umbilical hernia and ventral body wall closure.
    Mesh-Begriff(e) Animals ; Calmodulin-Binding Proteins/genetics ; Calmodulin-Binding Proteins/metabolism ; Mice ; Muscle Contraction ; Muscle, Smooth/metabolism ; Myosins/metabolism ; Phosphorylation ; Urinary Bladder
    Chemische Substanzen Calmodulin-Binding Proteins ; Myosins (EC 3.6.4.1)
    Sprache Englisch
    Erscheinungsdatum 2021-06-11
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3118-5
    ISSN 1540-7748 ; 0022-1295
    ISSN (online) 1540-7748
    ISSN 0022-1295
    DOI 10.1085/jgp.202012776
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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