Modulation of TXA2 generation of platelets by human lipoproteins
| Autor: | V.P. Masaev, H.-J. Mest, Nikitina Na, Ch. Giessler, A. Beitz, N.A. Perova, J. Beitz |
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| Rok vydání: | 1990 |
| Předmět: |
Adult
Blood Platelets medicine.medical_specialty Very low-density lipoprotein Heart disease Arteriosclerosis Lipoproteins Clinical Biochemistry Coronary Disease Thromboxane A2 chemistry.chemical_compound Internal medicine medicine Humans Platelet Triglycerides Whole blood Aged Cell Biology Serum concentration Middle Aged medicine.disease Thromboxane B2 Endocrinology Cholesterol chemistry lipids (amino acids peptides and proteins) circulatory and respiratory physiology Lipoprotein |
| Zdroj: | Prostaglandins, leukotrienes, and essential fatty acids. 40(1) |
| ISSN: | 0952-3278 |
| Popis: | The lipoprotein (LP) fractions VLDL, LDL, HDL2 and HDL3 were prepared by ultracentrifugation of plasma from healthy volunteers and from patients with coronary heart disease (CHD). We investigated the capacity of platelets from healthy volunteers and patients with atherosclerosis to generate thromboxane A2 (TXA2) during spontaneous clotting of whole blood under the influence of the lipoprotein fractions. In our experiments the serum concentration of TXB2, reflecting the capacity of platelets to generate TXA2 during clotting, depends on several factors: the type of LP fraction used, the blood used for generation of TXA2, and for the same LP fraction whether it was taken from plasma of healthy volunteers or patients with CHD. VLDL prepared from plasma of healthy volunteers inhibited but VLDL prepared from plasma of patients with CHD enhanced the TXA2 formation of platelets from healthy volunteers (p less than 0.05, resp.). LDL from CHD patients inhibited the TXA2 formation of platelets from atherosclerotic patients (p less than 0.01). The HDL subfractions HDL2 and HDL3 from healthy volunteers inhibited TXA2 formation by platelets from healthy volunteers as well as those from atherosclerotic patients (p less than 0.05; p less than 0.01, respectively). HDL2 from patients with CHD inhibited only the TXA2 formation of platelets from healthy volunteers (p less than 0.01), whereas HDL3 from CHD patients inhibited only the TXA2 formation of platelets from atherosclerotic patients (p less than 0.01). |
| Databáze: | OpenAIRE |
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