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Biomedical subjects

V Beaumont

Publications and source records attributed to V Beaumont.

At least 55 records · Page 3Linked to original sources
PubMed1980

[Treatment of prostatic cancer with diethylstilboestrol and detection of the vascular risk (author's transl)].

A retrospective study of immunologic behavior of patients suffering from cancer of the prostate and treated with oestrogens permits the proposal of the utilisation of a test that separates a high thromboembolic risk population due to oestrogens from a population that can benefit from this hormonotherapy. The so-called "oestrogen tolerance test" consists of seeking the presence of immune complexes by the method of precipitation of serum by 25% saturated ammonium sulphate. The group of patients where precipitates exceeds 700 micrograms/ml has a thrombo-embolic risk above 30% (41% in our series with serious complications such as pulmonary embolus and arterial thrombosis. The group of patients where precipitates are less than 300 micrograms/ml has a lower risk of arterial thrombosis (2,5%) and the observed accidents are benign. Finally, a test test when precipitate exceed 700 micrograms/ml should exclude diethylstilboestrol treatment.

Diethylstilbestrol↗
PubMed1980

[Giant cell thromboangiitis in a patient taking an oral contraceptive (author's transl)].

Pathological examination in a patient who developed an ischemic cerebrovascular accident while taking an oral contraceptive demonstrated widespread lesions in the right and left carotid regions. Histological examination revealed the presence of an obliterating thromboangiitis in the arterial walls, with subendothelial fibrosis of the intima, arterial thrombosis, and a marked giant cell reaction where the lesions were in contact with the internal elastic layer. Immunological and biological anomalies confirmed the inflammatory nature of the lesion with the presence of anti-ethinyl estradiol antibodies in the serum and circulating blood immune complexes. These biological and histological results suggest the immunological nature of the mechanism of origin of the cerebrovascular accident in this case.

Adult↗
PubMed1980

[Acute ischemic lesions in young women taking oral contraceptives. A report on 5 cases (author's transl)].

Severe ischemic lesions were observed in 5 cases among women aged between 35 and 43 years taking the contraceptive pill over a period of 4 years. Three of these patients developed sudden severe ischemia of the lower limbs after the unrecognized appearance of intermittent claudication for periods of from 2 to 10 months, and amputation was necessary after various ineffective treatments. Recovery occurred in the two other patients, one of whom developed ischemia in the upper limb, the other in the lower limb, who were treated at an early stage. The young age of these women and the absence of atheroma were factors that suggested that the oral contraceptives, taken for periods of from 6 months to 4 years, were at least partially responsible for the lesions, and this hypothesis was supported by the discovery of anti-ethinyl estradiol antibodies in the serum. This was probably not the only causative factor, however, as all the patients were smokers. These cases demonstrate the danger of associating smoking with the taking of oral contraceptives, that the latter should be discontinued when signs suggestive of peripheral arterial insufficiency appear, and that urgent thrombectomy should be conducted in cases of severe ischemic lesions.

Adult↗
PubMed1980

Ethinylestradiol and diethylstilbestrol induced antibodies and vascular thrombosis.

Antiethinylestradiol antibodies were demonstrated in several oral contraceptive users. The antibodies could be precipitated from serum immune complexes by 25% saturated ammonium sulfate. This test of serum precipitation was applied to a comparative study of 116 women on O.C and 65 men treated with diethylstilbestrol for a prostatic cancer. Controls without hormones were included in each group. The test was shown to discriminate among the estrogen users reactive and unreactive persons. 34% of women and 41% of men had high levels of precipitated immunoglobulins in 25% saturated ammonium sulphate. Study of the specificity of the Igs purified from the precipitates in reactive cases, showed that they were binding ethinylestradiol with an affinity constant consistent with an antigen antibody reaction. It is concluded that the oral ingestion of two different synthetic estrogen compounds may induce antiestrogen antibodies. The relation of these antibodies with the increased incidence of vascular thrombosis is considered.

Adolescent↗
PubMed1979

[Type V hyperlipemia. 54 cases (author's transl)].

Type V hyperlipemia is not very common. The series of 54 cases descrubed here is the largest reported to date. Our observations were recorded when lipidograms showed the presence of chylomicrons and a large pre-beta-lipoprotein spot in the serum of fasting subjects. Type V hyperlipemia was often combined with other metabolic syndromes such as diabetes, hyperuricemia or gout, or obesity. Chronic alcoholism was also noted in half our subjects, in whom hyperlipemia quickly regressed after alcohol consumption ceased. Ischemic arterial complications, chiefly coronary, were found in one third of our cases, and the vascular risks accompanying this type of hyperlipemia rose considerably in patients with high blood pressure. Various type of treatment were administered, but all subjects were put on a special diet, comprising either the elimination of alcoholic drinks only, or, in addition to this, reduced carbohydrate or calorie intake. As a rule, these measures resulted in a distinct regression of lipid anomalies. Clofibrate or derivatives proved effective in cases where hyperlipemia failed to respond to dietary measures.

Adolescent↗
PubMed1978

[Contraceptive hormones, vascular risk and abnormal precipitation of serum gamma-globulins (author's transl)].

The monoclonal anti-ethinyl-estradiol antibody previously found in the serum of a woman on oral contraceptives, was precipitated by 25% saturated ammonium sulfate à 22 degrees C. This simple test has been used to investigate the possible relationship between abnormally precipitating gamma-globulins (GAP) and the vascular risk of the pill. Four groups of women were studied: --50 women who had never used the pill; --100 women on oral contraceptives; --30 women who had stopped the pill; --17 women had experienced venous or arterial thrombosis during oral contraception. The results obtained indicate: 1) that a GAP increase is nearly always associated with the thrombotic events (90% of the cases in group 4); 2) that the presence of GAP is seen only in part of the women population on oral contraceptives representing approximately 30% of the total population investigated as indicated by a bimodal distribution. 3) that the GAP remain increased for months and even years after the pill was discontineud. The significance of this test is discussed. It is proposed that the presence of GAP in the serum appears to be related to the presence of ethinyl-estradiol binding antibodies. This hypothesis is verified by experiments in progress.

Adolescent↗
PubMed1976

[Antiheparin immunoglobulin in malignant lymphoma with hypertriglyceridemia, in the hamster].

A massive hypertriglyceridemia associated with low post heparin lipolytic activity, was demonstrated during the growth of a transplanted lymphoma in Hamsters. An immunoglobulin, with high anti-heparin activity, was extracted from the tumor. It could inhibit both the anti-thrombin and prolipase activity of heparin. The role of this anti-heparin immunoglobulin in triglyceride metabolism allows us to consider the hypertriglyceridemia of lymphoma-bearing Hamsters as one of the two previously described types of auto-immune hyperlipidemia.

Animals↗
PubMed1976

Ischaemic disease in men and women with familial hypercholesterolaemia and xanthomatosis. A comparative study of genetic and environmental factors in 274 heterozygous cases.

The incidence of ischaemic diseases in familial hypercholesterolaemia and xanthomatosis (familial Type II) was studied in a group of 158 men and 116 women. (1) Men and women did not differ with regard to the inherited metabolic disease. Levels of serum cholesterol, the marker of the genetic defect, were not statistically different, and cholesterol deposition in tissues, visualized by skin tendon xanthomas, was not sex related. (2) Men and women were different with regard to ischaemic diseases. The incidence was much lower in women, and the mean age of onset 9 years later. Moreover, there was a sex difference in the nature of the ischaemic disease, with a high male predominance of myocardial infarction. (3) Since the major risk factor hypercholesterolaemia could not explain such a difference, the role of other risk factors was investigated. It was shown that the incidence of ischaemic diseases was increased in women by cigarette smoking and hypertension, and that the difference in age of onset between males and females was no longer seen in smoking women. It is suggested that the genetic factor is responsible for the atherosclerotic lesion in both sexes and that other factors playing a role in ischaemic complications including tobacco and hypertension may explain the difference between men and women.

Adult↗