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Biomedical subjects

P Dupont

Publications and source records attributed to P Dupont.

At least 127 records · Page 7Linked to original sources
PubMed1983

[Inhibition of prostaglandins in the syndrome of inappropriate secretion of antidiuretic hormone (SIADH)].

The role played by prostaglandins in the secretion of ADH and modulation of its action was investigated by testing the effects of prostaglandin synthesis inhibition in patients with SIADH of cerebral or pulmonary origin. Three patients with SIADH of central origin and 3 with SIADH of peripheral origin were subjected to 4 successive water-loading tests. In the first and fourth tests, the patients absorbed water 20 ml/kg bodyweight; in the second test they absorbed alcohol 2.5 ml/kg followed by water 17.5 ml/kg. The third test was preceded by a 3-day inhibition of prostaglandin synthesis with indomethacin 200 mg/day and aspirin 1.5 g/day. In patients with SIADH of peripheral origin the percent water-load excreted after 4 hours was low (less than 35%) with the 4 tests, whereas it reached 80% (p less than 0.001) with the third test (prostaglandin inhibition) in those with SIADH of central origin. Alcohol did not significantly correct the antidiuretic effect in any of the patients in both groups. It is concluded that prostaglandins reduce ADH secretion in central SIADH but do not modify antidiuresis in peripheral SIADH, since ectopic secretion probably does not depend on prostaglandins. The prostaglandin inhibition test therefore seems to be more helpful than the alcohol test to differentiate between central and peripheral SIADH. Further studies, however, are required to confirm these findings.

Adult↗
PubMed1983

Glomerulonephritis associated with chronic bacterial infection of a dacron arterial prosthesis.

Glomerulonephritis associated with severe chronic visceral or systemic infection is being increasingly recognized. The development of glomerulonephritis in association with chronic infection of prosthetic material permanently implanted in the circulatory system has been regularly reported since the description of "shunt nephritis" by Black, Challacombe and Ockenden in 1965. Nearly all of these cases have involved ventriculo-vascular shunts. However, this report documents the apparently rare association between glomerulonephritis and chronic bacterial infection of a bifurcate dacron aorto-bifemoral graft. The need for awareness of glomerulonephritis as a cause of acute renal failure in chronic infective states is highlighted.

Bacterial Infections↗
PubMed1982

[Hypouricaemia in the syndrome of inappropriate ADH secretion (SIADH) (author's transl)].

A retrospective study of 22 patients with hyponatraemia (less than 130 mEq/l) was conducted to find out whether hypouricaemia was useful in the diagnosis of SIADH. Serum levels of uric acid were inferior to 38 mg/l in 9 out of 12 patients with SIADH but not in the remaining 10 patients without SIADH. The mechanism of hypouricaemia in the syndrome seems to be an increase in uric acid excretion, since water restriction reduces the fractional clearance of urates. The authors conclude that hypouricaemia appears to constitute a reliable means of detecting SIADH in patients with hyponatraemia.

Diagnosis, Differential↗
PubMed1981

[Long-term side-effects of diuretics in the treatment of hypertension (author's transl)].

The clinical and biochemical side-effects of diuretics administered without potassium supplement were monitored during one year in 58 hypertensive out-patients. The only changes observed were a moderate rise in triglycerides (correlated with weight increase) and in blood glucose. Blood urea, creatinine, potassium, calcium, uric acid and cholesterol remained unchanged. The objections raised against the use of diuretics as anti-hypertensive agents, such as the need for close surveillance of biochemical values and the fear that the beneficial effects on blood pressure would be upset by an increase in other cardiovascular risk factors (some of which are still highly controversial), therefore appear to be unfounded.

Blood Glucose↗
PubMed1981

The biotransformation of [14C]minaprine in man and five animals species.

1. [14C]Minaprine was administered as a single oral dose to five animal species and to a healthy and informed volunteer. Excretion of radioactivity was followed during 48 h in urine and faces; biliary excretion was followed only in rat. 2. Urinary metabolites were isolated and identified by mass spectrometry. 3. A quantitative comparison of metabolites in different species was made. On the basis of these data it it concluded that the dog is not a suitable model for man for pharmacological or toxicological studies. 4. The major metabolic route is 4-hydroxylation of the aromatic ring. The only unexpected metabolic route found was the biotransformation of the morpholino ring, probably by reductive ring-cleavage. 5. About 50% of the 14C was excreted in 0-48 h urine. The other 50% was excreted in the 0-48 h faces. In the rat, this was attribute entirely to biliary excretion. The drug is well absorbed after oral administration and is not accumulated in the body.

Adult↗
PubMed1980

Collagenous colitis: an unrecognised entity.

A patient is reported with chronic abdominal pain, diarrhoea, and associated radiological and endoscopic abnormalities of the sigmoid colon. Light and electron microscopic study of colorectal mucosa showed abnormal collagenous thickening of the subepithelial basement membrane. The authors felt that the clinical and morphological features justified a diagnosis of collagenous colitis. Review of the literature suggested that collagenous colitis was still an unrecognised entity.

Colitis↗