Resveratrol inhibits polyphosphoinositide metabolism in activated platelets
| Autor: | Holm Holmsen, Barbara Wachowicz, Miriam H. Fukami, Beata Olas |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Blood Platelets
Phosphatidylinositol 4 5-Diphosphate Polyphosphoinositide signalling Biophysics Down-Regulation Transferases (Other Substituted Phosphate Groups) Resveratrol Biochemistry Phosphatidate chemistry.chemical_compound Phosphatidylinositol Phosphates Stilbenes Humans Platelet Inositol Phosphatidylinositol Platelet activation Cells Cultured Chemistry Kinase Blood platelet Thrombin Membrane Proteins Cell Biology CDP-Diacylglycerol-Inositol 3-Phosphatidyltransferase Platelet Activation Cell biology Phosphotransferases (Alcohol Group Acceptor) Platelet aggregation inhibitor Platelet Aggregation Inhibitors |
| Zdroj: | Biochimica et Biophysica Acta (BBA) - Biomembranes. 1714:125-133 |
| ISSN: | 0005-2736 |
| DOI: | 10.1016/j.bbamem.2005.06.008 |
| Popis: | The effects of resveratrol (trans-3,4′,5-trihydroxystilbene) on activation responses and the polyphosphoinositide metabolism in human blood platelets have been studied. Resveratrol partially inhibited secretory responses (liberation of dense granule nucleotides and lysosomal acid hydrolases), microparticle formation and protein phosphorylations induced by thrombin. The effects of resveratrol on phosphoinositide metabolites, phosphatidate (PtdOH), phosphatidylinositol (PtdIns), phosphatidylinositol-4-phosphate (PtdIns-4(5)-P), phosphatidylinositol 4,5-bisphosphate (PtdIns-4,5-P2), phosphatidylinositol-3,4-bisphosphate (PtdIns-3,4-P2) and phosphatidylinositol-3,4,5-trisphosphate (PtdIns-3,4,5-P3) were monitored in blood platelets prelabelled with [32P]Pi. Resveratrol not only inhibited the marked increase in levels of PtdOH in platelets activated by thrombin (0.1 U/ml) but it decreased the steady state levels of the other polyphosphoinositide metabolites. The distribution of 32P in phosphoinositides in activated platelets was consistent with inhibition of CDP-DAG inositol transferase and a weak inhibition of PtdIns-4(5)-P kinase. These observations show that resveratrol has a profound effect on phospholipids, particularly on polyphosphoinositide metabolism, and may decrease the amount of PtdIns-4,5-P2 available for signalling in these cells. |
| Databáze: | OpenAIRE |
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