scholarly journals Dependence of fluid-phase pinocytosis in arterial smooth-muscle cells on temperature, cellular ATP concentration and the cytoskeletal system

1983 ◽  
Vol 216 (2) ◽  
pp. 467-473 ◽  
Author(s):  
E M Muir ◽  
D E Bowyer
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cells ◽  
Cytochalasin B ◽  
Fluid Phase ◽  
Muscle Cells ◽  
Temperature Dependent ◽  
Arterial Smooth Muscle ◽  
Arterial Smooth Muscle Cells ◽  
Cytoskeletal System ◽  
Similar Decrease

125I-labelled poly(vinylpyrrolidone) was used as a marker of fluid-phase pinocytosis in cultured pig arterial smooth-muscle cells. The rate of pinocytosis was temperature-dependent. A decrease in cellular ATP concentrations as a result of inhibition of either glycolysis or oxidative phosphorylation was associated with a similar decrease in pinocytosis. A microfibrillar-disruptive agent, cytochalasin B, caused a concentration-dependent stimulation of pinocytosis, whereas the microtubular-disruptive agents colchicine and vinblastine decreased pinocytosis to approximately half of control values at all concentrations used. These results indicate that fluid-phase pinocytosis in smooth-muscle cells is dependent on a continuing supply of energy and the integrity of the microtubules. Furthermore, microfilaments appear to exert a certain degree of constraint on pinocytosis, possibly by restricting invagination of the plasma membrane.

scholarly journals Effects of vasopressin on ATP-sensitive and Ca2+-activated K+ channels of coronary arterial smooth muscle cells

1992 ◽  
Vol 58 ◽  
pp. 339
Author(s):  
Tetsuzo Wakatsuki ◽  
Yutaka Nakaya ◽  
Yukiko Miyoshi ◽  
Zeng Xiao-Rong ◽  
Masahiro Nomura ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cells ◽  
Muscle Cells ◽  
Arterial Smooth Muscle ◽  
K Channels ◽  
Arterial Smooth Muscle Cells

Propagation of fast and slow intercellular Ca2+ waves in primary cultured arterial smooth muscle cells

Cell Calcium ◽  
2011 ◽  
Vol 50 (5) ◽  
pp. 459-467 ◽  
Author(s):  
Nadia Halidi ◽  
François-Xavier Boittin ◽  
Jean-Louis Bény ◽  
Jean-Jacques Meister
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cells ◽  
Muscle Cells ◽  
Arterial Smooth Muscle ◽  
Arterial Smooth Muscle Cells

Independence of growth factor induced plasminogen activator inhibitor type-1 (PAI-1) expression from the 4G/5G polymorphism of the PAI-1 gene

2003 ◽  
Vol 90 (07) ◽  
pp. 36-42 ◽  
Author(s):  
Esther Eschenfelder ◽  
Karlheinz Peter ◽  
Burton Sobel ◽  
Christoph Bode ◽  
Thomas Nordt
Keyword(s):  
Smooth Muscle ◽  
Growth Factors ◽  
Smooth Muscle Cells ◽  
Genetic Factors ◽  
Plasminogen Activator Inhibitor ◽  
Muscle Cells ◽  
Arterial Smooth Muscle ◽  
Gene And Protein Expression ◽  
Arterial Smooth Muscle Cells ◽  
Pai 1

SummaryIncreased PAI-1 expression has been implicated in accelerating atherogenesis. Increases under some conditions are modulated by growth factors. Genetic factors such as the 4G/5G poly-morphism in the promoter of the PAI-1 gene play a role under certain circumstances. The present study was designed to delineate for the first time interactions between growth factors and the 4G/5G polymorphism with respect to PAI-1 expression in human arterial smooth muscle cells (HASMC).HASMC were genotyped and exposed to growth factors. PAI-1 gene and protein expression were induced consistently by TGF-β (up to 4.0-fold), PDGF (2.1-fold),TNF-α (1.7-fold), and thrombin (2.3-fold). Results were similar regardless of which genotype (4G/4G [n=9], 4G/5G [n=13], and 5G/5G [n=7]) was present.The induction of increased PAI-1 expression in human arterial smooth muscle cells by growth factors implicated in accelerated atherogenesis is independent of the PAI-1 4G/5G polymorphism. Accordingly, modulation of PAI-1 expression is likely to be influenced predominantly by environmental factors acting on, rather than genetic factors intrinsic to the PAI-1 promoter.

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