Changes of VASP in shear stress induced cytoskeleton reorganization in endothelial cells / 中国应用生理学杂志
Chinese Journal of Applied Physiology
;
(6): 313-317, 2004.
Article
Dans Chinois
| WPRIM
| ID: wpr-330111
ABSTRACT
<p><b>AIM</b>To investigate the effects of different level of laminar shear stresses on the vasodilator-stimulated phosphoprotein (VASP) location and expression changes associated with actin reorganization and it's mechanism.</p><p><b>METHODS</b>A parallel-plate flow chamber device was used to create laminar shear stress in vitro on cultured human umbilical endothelial cells (HUVECs). The distribution of VASP and microfilament were observed by double immunofluorescence staining. RT-PCR was used to test VASP mRNA level, while VASP parameters were analyzed quantitatively with Western blot.</p><p><b>RESULTS</b>After exposure to a flow of 10 dyn/cm2 flow for 24 h, HUVECs were elongated and oriented gradually to the direction of the flow. The microfilaments were recruited and oriented to the direction of flow with thicker VASP, specially targeted to the ends of stress fibres. RT-PCR result indicated shear could induce VASP mRNA increase. Western blotting data showed a dynamic reversible phosphorylation of VASP during 24 h, and total VASP expression increased rapidly, peaked at 2 h, then recovered at 8h followed by a slow increase again. H89, a cAMP inhibitor could inhibit shear induced VASP expression increase and phosphorylation.</p><p><b>CONCLUSION</b>VASP is an potential important component which participates in the regulation of cell cytoskeleton reorganization and morphology modification induced by shear flow via a cAMP/cAK pathway.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Phosphoprotéines
/
Phosphorylation
/
Physiologie
/
Cytosquelette
/
Molécules d'adhérence cellulaire
/
Cellules cultivées
/
Résistance au cisaillement
/
Cellules endothéliales de la veine ombilicale humaine
/
Métabolisme
/
Protéines des microfilaments
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Chinese Journal of Applied Physiology
Année:
2004
Type:
Article
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