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Biomedical subjects

J F MUSTARD

Publications and source records attributed to J F MUSTARD.

At least 19 recordsLinked to original sources

THE EFFECT OF SULFINPYRAZONE (ANTURAN) ON PLATELET ECONOMY AND BLOOD COAGULATION IN MAN.

Sulfinpyrazone (Anturan) administered in therapeutic doses over a period of several weeks produced prolongation of platelet survival and reduced turnover but with little change in blood coagulation. The changes in platelet survival and turnover were associated with reduced platelet adhesiveness. It is therefore possible to affect platelet economy in man significantly, without producing corresponding effects on blood coagulation.

Arthritis↗

THROMBOSIS.

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Anticoagulants↗

BLOOD COAGULATION AND PLATELET ECONOMY IN SUBJECTS WITH PRIMARY GOUT.

Previous studies have suggested that there is an increased incidence of degenerative vascular disease in patients with gout and an increased rate of turnover of blood platelets in patients and animals with atherosclerosis. A disturbed uric acid metabolism and "secondary" gout have long been known to occur with bone marrow diseases. A study of platelet economy and blood clotting factors in subjects with primary gout was therefore undertaken.Twenty-two male subjects with gout but with no clinical evidence of vascular disease were studied. Half of these had a negative family history for vascular disease and half had less fortunate ancestors. The most striking differences were found when gouty patients with a negative family history for vascular disease were compared with similar control subjects. The mean platelet half-life was 2.85 days in the gouty subjects and 3.74 days in the controls. The mean platelet turnover (number/c.mm./day) was 58,750 in gouty subjects, 42,370 in controls. Platelet adhesiveness and plasma thromboplastic activity were correspondingly increased in the gouty subjects. Control subjects with a positive family history all showed relatively active clotting system and platelet turnover, similar to the values found in atherosclerotic subjects. The data indicated that there is increased platelet destruction and production in some patients with primary gout. The relation between this anomaly and the vascular disease, and disturbed urate metabolism in gouty subjects, remains to be investigated.

Arteriosclerosis↗

The occurrence of microthrombi on the aortic endothelium of swine.

Evidence is presented in this report that microthrombi composed chiefly of platelets form on what appears to be morphologically normal swine endothelium and that the pattern of the deposits corresponds to that in analogous flow-chamber models, and to the lesions in the early stages of swine atherosclerosis. Since mural thrombi occur in young swine, it seems reasonable to suggest that this is to some extent a normal process. The cumulative effects of such a process could be a factor in the primary as well as the late stages of atherosclerosis.

Animals↗

Encrustation and atherosclerosis: the analogy between early in vivo lesions and deposits which occur in extracorporeal circulations.

A study was made of the relation between the pattern and topography of thrombus formation in models of various vessel configurations coupled into extracorporeal shunts in swine and the development of atherosclerosis at corresponding sites on swine aortas. The pattern and distribution of deposits formed in the models were strikingly similar to the pattern and distribution of incipient atherosclerosis at comparable sites in the vascular tree. The earliest and only consistent component of the flow chamber deposits was the blood platelet. The platelet deposits would frequently stain with oil red O. The cholesterol level of washed human platelets was found to show a good correlation with that in the plasma. This evidence suggests that deposition of particulate matter (chiefly platelets), largely determined by the hydraulic factors, may be an important factor in the early, as well as later, stages of atherosclerosis.

Animals↗