PubMed Health⌕ Search

Biomedical subjects

B Wachowicz

Publications and source records attributed to B Wachowicz.

69 records · Page 4Linked to original sources
PubMed1981

Migraine: a platelet disorder.

The hypothesis that migraine is caused by a primary abnormality of platelet behaviour was investigated in a total of 77 migraine patients and control subjects. Platelets taken from patients with classical migraine during a headache-free period demonstrated significantly higher spontaneous platelet aggregation and platelet adhesion than platelets from controls. Platelet 5-hydroxytryptamine release within three days of a migraine attack was significantly less than that measured during a migraine-free interval. Platelets from migraine patients differ significantly in their behaviour from normal platelets, and these differences can explain the onset and recurrence of attacks.

Adenine Nucleotides↗
PubMed1979

The released proteins from avian thrombocytes.

The effect of aggregating agents on the amounts and nature of released proteins from washed goose and chicken thrombocytes was studied. The released protein material was separated on Sepharose 4B. Protein fractions with low molecular weight were next chromatographed on Sephadex G-200. The released proteins from thrombin aggregated pig platelets were analysed in the same way. It was shown that during aggregation avian thrombocytes release protein material containing a well separated fraction (the major component) which seems to correspond to a platelet specific beta-thromboglobulin.

Animals↗
PubMedDate not supplied

UV-B-induced generation of free radicals in blood platelets.

UV-B irradiation of blood-platelet concentrates is used in transfusion practice to prevent the development of post-transfusion alloimmunization and inactivate viruses and bacteria in the concentrates. UV-B radiation may affect the blood-platelet metabolism and function; therefore we have investigated the effect of UV-B irradiation on free radical production in blood platelets. Our results show that exposure of pig blood platelets to UV-B radiation (0.36 and 1.08 J/cm2) induces the generation of free radicals measured by the chemiluminescence method (respectively 28 and 148.6% above the control). The superoxide radical level after UV-B irradiation measured by the cytochrome c reduction method shows only a slight increase (p > 0.05). Free radical generation induced by UV-B radiation is dependent partly on blood-platelet activation and enzymatic pathways, since we have shown that wortmannin, an inhibitor of phosphatidylinositide 3-kinase, reduces the level of radicals formed in blood platelets after UV-B irradiation. This indicates that free radicals generated in blood platelets after stimulation by UV-B radiation are involved in platelet activation and metabolism of platelet polyphosphoinositides.

Androstadienes↗
PubMedDate not supplied

[The effect of suloctidil and acetylsalicylic acid on eicosanoid synthesis in human platelets].

The study aimed at comparing an effect of suloctidil and acetylsalicylic acid on malonyldialdehyde levels resulting from the arachidonic acid metabolism in blood platelets. It was shown that inhibitory effect of suloctidil is more potent than that of acetylsalicylic acid. Therefore the first is more inhibitor of an enzymatic metabolism of arachidonate in blood platelets than the latter.

Adult↗
PubMedDate not supplied

The inhibitory effect of UV-light on thrombin-induced pig platelet aggregation.

The effect of ultraviolet radiation on the thrombin-stimulated aggregation of washed pig platelets was studied. It was observed that UV radiation (UV-A, 0.5 W/cm2) inhibited aggregation of pig platelets induced by thrombin. Plasma may have a protective role against the damaging effect of UV light on platelet aggregation.

Animals↗
PubMedDate not supplied

[C-14 serotonin uptake by turkey thrombocytes].

Centrifugation technique of thrombocytes through silicone oil permits rapid separation of cells from plasma with simultaneous measurement of plasma trapped between the cells in the pellet. This technique was used for determination of 5-HT uptake by turkey thrombocytes. The volume of trapped plasma proportional to the number of thrombocytes was measured using 125I-human serum albumin as a marker. The uptake of 14C-serotonin by thrombocytes was measured as the difference between total radioactivity and that of the trapped plasma. It was shown that turkey thrombocytes like mammalian platelets are able to take up great amounts of serotonin.

Animals↗