Publication Date:
1995-10-13
Description:
Stimulation of rat vascular smooth muscle cells (VSMCs) by platelet-derived growth factor (PDGF) transiently increased the intracellular concentration of hydrogen peroxide (H2O2). This increase could be blunted by increasing the intracellular concentration of the scavenging enzyme catalase or by the chemical antioxidant N-acetylcysteine. The response of VSMCs to PDGF, which includes tyrosine phosphorylation, mitogen-activated protein kinase stimulation, DNA synthesis, and chemotaxis, was inhibited when the growth factor-stimulated rise in H2O2 concentration was blocked. These results suggest that H2O2 may act as a signal-transducing molecule, and they suggest a potential mechanism for the cardioprotective effects of antioxidants.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sundaresan, M -- Yu, Z X -- Ferrans, V J -- Irani, K -- Finkel, T -- New York, N.Y. -- Science. 1995 Oct 13;270(5234):296-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cardiology Branch, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Bethesda, MD 20892-1650, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569979" target="_blank"〉PubMed〈/a〉
Keywords:
Acetylcysteine/pharmacology
;
Adenoviridae/genetics/physiology
;
Animals
;
Calcium-Calmodulin-Dependent Protein Kinases/metabolism
;
Catalase/metabolism
;
Cell Line
;
Cells, Cultured
;
Chemotaxis/drug effects
;
Endopeptidase K
;
Free Radical Scavengers/pharmacology
;
Humans
;
Hydrogen Peroxide/*metabolism
;
Mitogen-Activated Protein Kinase 1
;
Mitogen-Activated Protein Kinase 3
;
*Mitogen-Activated Protein Kinases
;
Muscle, Smooth, Vascular/cytology/drug effects/*metabolism/virology
;
Phosphorylation
;
Phosphotyrosine/metabolism
;
Platelet-Derived Growth Factor/*pharmacology
;
Protein-Tyrosine Kinases/metabolism
;
Rats
;
Serine Endopeptidases/metabolism
;
*Signal Transduction
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
