scholarly journals An activator of protein kinase C (phorbol dibutyrate) attenuates atrial-natriuretic-factor-stimulated cyclic GMP accumulation in smooth-muscle cells

1987 ◽  
Vol 244 (2) ◽  
pp. 481-484 ◽  
Author(s):  
P Nambi ◽  
M Whitman ◽  
N Aiyar ◽  
F Stassen ◽  
S T Crooke
Keyword(s):  
Smooth Muscle ◽  
Protein Kinase C ◽  
Protein Kinase ◽  
Smooth Muscle Cells ◽  
Cyclic Gmp ◽  
Atrial Natriuretic Factor ◽  
Muscle Cells ◽  
Phorbol Dibutyrate ◽  
Kinase C ◽  
Natriuretic Factor

Rat thoracic aortic smooth-muscle cells (A-10; A.T.C.C. CRL 1476) displays a high density of vasopressin and atrial-natriuretic-factor (ANF) receptors and a low density of beta-adrenergic receptors. ANF stimulates cGMP (cyclic GMP) accumulation in a time- and dose-dependent fashion. Pretreatment of these cells with phorbol dibutyrate (PDBu), a known activator of protein kinase C, attenuated ANF-stimulated cGMP accumulation without affecting basal cGMP concentrations. This effect was concentration-dependent and was observed as early as 2 min after treatment. 4 alpha-Phorbol 12, 13-didecanoate (alpha PDD), which does not activate protein kinase C, did not inhibit the cGMP accumulation. PDBu pretreatment did not affect the density and affinity of ANF receptors. These data suggest that PDBu, presumably via activation of protein kinase C, might stimulate phosphorylation of a key regulatory protein in the ANF/cGMP pathway.

Regulation of Scavenger Receptor Expression in Smooth Muscle Cells by Protein Kinase C

1997 ◽  
Vol 17 (5) ◽  
pp. 969-978 ◽  
Author(s):  
Michele Mietus-Snyder ◽  
Annabelle Friera ◽  
Christopher K. Glass ◽  
Robert E. Pitas
Keyword(s):  
Smooth Muscle ◽  
Protein Kinase C ◽  
Protein Kinase ◽  
Smooth Muscle Cells ◽  
Scavenger Receptor ◽  
Muscle Cells ◽  
Receptor Expression ◽  
Kinase C

Antiproliferative action of protein kinase C in cultured rabbit aortic smooth muscle cells

1987 ◽  
Vol 173 (2) ◽  
pp. 504-514 ◽  
Author(s):  
Ken-Ichi Kariya ◽  
Yasuo Fukumoto ◽  
Terutaka Tsuda ◽  
Takeshi Yamamoto ◽  
Yasuhiro Kawahara ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Protein Kinase C ◽  
Protein Kinase ◽  
Smooth Muscle Cells ◽  
Muscle Cells ◽  
Aortic Smooth Muscle Cells ◽  
Aortic Smooth Muscle ◽  
Kinase C ◽  
Antiproliferative Action

scholarly journals Minimally Modified LDL Upregulates Endothelin Type A Receptors in Rat Coronary Arterial Smooth Muscle Cells

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Jie Li ◽  
Lei Cao ◽  
Cang-Bao Xu ◽  
Jun-Jie Wang ◽  
Yong-Xiao Cao
Keyword(s):  
Smooth Muscle ◽  
Protein Kinase C ◽  
Protein Kinase ◽  
Smooth Muscle Cells ◽  
Coronary Arteries ◽  
Muscle Cells ◽  
Type A ◽  
Receptor Mrna ◽  
Kinase C ◽  
Arterial Smooth Muscle Cells

Minimally modified low-density lipoprotein (mmLDL) is a risk factor for cardiovascular disease. The present study investigated the effects of mmLDL on the expression of endothelin type A () receptors in coronary arteries. Rat coronary arteries were organ-cultured for 24 h. The contractile responses were recorded using a myographic system. receptor mRNA and protein expressions were determined using real-time PCR and western blotting, respectively. The results showed that organ-culturing in the presence of mmLDL enhanced the arterial contractility mediated by the receptor in a concentration-dependent and time-dependent manner. Culturing with mmLDL (10 μg/mL) for 24 h shifted the concentration-contractile curves toward the left significantly with increased of from control of and significantly increased receptor mRNA and protein levels. Inhibition of the protein kinase C, extracellular signal-related kinases 1 and 2 (ERK1/2), or NF-κB activities significantly attenuated the effects of mmLDL. The c-Jun N-terminal kinase inhibitor or the p38 pathway inhibitor, however, had no such effects. The results indicate that mmLDL upregulates the receptors in rat coronary arterial smooth muscle cells mainlyviaactivating protein kinase C, ERK1/2, and the downstream transcriptional factor, NF-κB.

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