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Biomedical subjects

D Sommariva

Publications and source records attributed to D Sommariva.

At least 37 records · Page 2Linked to original sources
PubMed1986

Long-term effects of bezafibrate and of a bezafibrate and cholestyramine combination on lipids and lipoprotein lipids in type IIa hypercholesterolaemic patients.

Eighteen hypercholesterolaemic patients have been treated for four months with bezafibrate 200 mg thrice daily. After one month of therapy, total cholesterol (T-C) decreased on the average by 19%, total triglycerides (T-TG) by 28%, very low density lipoprotein-TG by 47%, LDL-C by 25% and HDL3-C increased by 16%. At the fourth month of therapy the lipoprotein pattern was unchanged as compared to the one observed at the first month. In 12 patients T-C was normalized by bezafibrate and the patients continued the treatment for one year without experiencing further changes in lipoprotein pattern. Six patients with severe hypercholesterolaemia (mean baseline T-C of 11.51 +/- 0.63 mmoles/l) failed to adequately respond to bezafibrate treatment and were put on the combined bezafibrate 600 mg/day and cholestyramine 16g/day therapy. During bezafibrate their T-C decreased on the average by 21% and LDL-C by 23% and during the combined therapy by 33% and by 37% respectively, as compared to the baseline values. Combined bezafibrate and cholestyramine treatment seems then to be more effective than bezafibrate alone in decreasing serum cholesterol and may be useful in patients with severe hypercholesterolaemia.

Adult↗
PubMed1986

Probucol and cholestyramine combination in the treatment of severe hypercholesterolemia.

This study was carried out to evaluate the effect of the combined probucol and cholestyramine treatment on the lipoprotein pattern of hypercholesterolemic patients. Probucol was given in the dose of 1 g and cholestyramine in the dose of 16 g per day in 3 different sequences: Probucol, Cholestyramine, Probucol + Cholestyramine; Probucol + Cholestyramine, Probucol, Cholestyramine; Cholestyramine, Probucol + Cholestyramine, Probucol. After a period of dietary stabilization, 12 patients were randomly allocated to one of the treatment sequences to be followed for 9 months. Each treatment period lasted 3 months. During the cholestyramine period serum cholesterol decreased on the average by 18% and LDL cholesterol by 26%; during probucol, the mean decrease was 13% and 14%, and during the combined therapy 26% and 32%, respectively. Serum triglycerides and VLDL cholesterol showed a trend toward an increase during the cholestyramine period. HDL2 cholesterol significantly decreased during probucol treatment. Variation in both VLDL and HDL2 cholesterol observed when the drugs were given singly were no longer seen during the combination therapy.

Adult↗
PubMed1986

Effects of benfluorex on sterol biosynthesis in incubated human blood mononuclear cells.

The hypocholesterolaemic drug Benfluorex has been shown to inhibit the rate of sterol synthesis in rat hepatocytes. At present no data on a similar effect in human cells are available. The results of the present study demonstrate that Benfluorex has an inhibitory activity on the incorporation of 14C-acetate and of 14C-HMG-CoA into non-saponifiable lipids in human blood mononuclear cells incubated in lipid-deficient medium. The lack of effect on the incorporation of 14C-mevalonate into non-saponifiable lipids strongly suggests that the reduction of sterol biosynthesis is mainly due to the inhibition of HMG-CoA reductase activity.

Blood Cells↗
PubMed1985

Changes in the serum lipoprotein pattern induced by two low-fat diets with a different vegetable content in hypercholesterolemic patients.

Thirty-two hypercholesterolemic outpatients were treated by a conventional low-fat diet (carbohydrate 56%; fat 25%; vegetable proteins 7%; animal proteins 12% of energy; P/S ratio 1.0). After 1 month T-C decreased by 11%, VLDL-C by 32%, LDL-C by 8%, HDLt-C by 10% and HDL2-C by 11%. Thirty-two comparable patients were treated by a different low-fat diet which provided 69% of energy as carbohydrate, 19% as fat, 7% as vegetable proteins and 5% as animal proteins; P/S ratio was 1.3. After 1 month T-C decreased by 9% and LDL-C by 12%. VLDL-C, HDL2-C and HDL3-C did not change significantly. A cross-over study on 24 patients confirmed that both diets have lowering effects on T-C and LDL-C levels, but only the conventional low-fat diet decreases VLDL-C and HDL2-C.

Adult↗
PubMed1985

Changes in serum lipoprotein pattern following bezafibrate. Differential effects in type IIa and in type IIb hyperlipoproteinemic patients.

Sixteen type IIb and 26 type IIa hyperlipoproteinemic patients were treated with bezafibrate 200 mg t.i.d. After 1 month VLDL-TG decreased by 54% in type IIb and by 43% in type IIa; LDL-C decreased by 13% in type IIb and by 23% in type IIa patients. HDL3-C rose in both group of patients, while HDL2-C significantly increased (52%) only in patients with phenotype IIb. The change in LDL-C and in HDL2-C concentrations resulted to be related to the pretreatment VLDL lipid concentration and to its change during the treatment. Twenty patients were treated with bezafibrate for 4 months. On the average, the changes in lipoprotein lipid concentration attained at the end of the first month of therapy remained substantially constant in the following 3 months.

Adult↗
PubMed1984

Fenofibrate therapy of hypertriglyceridaemia. Differential effects on LDL cholesterol level in type IV and in type IIb primary hyperlipoproteinaemia.

Twenty five hypertriglyceridaemic patients (16 Type IV and 9 Type IIb) were treated with fenofibrate 300 mg/d. In Type IV patients serum triglycerides and VLDL cholesterol decreased, while LDL and HDL cholesterol rose significantly. In Type IIb patients, triglycerides and total, VLDL, IDL and LDL cholesterol were significantly reduced by the treatment. The correction of hypertriglyceridaemia by fenofibrate seems, therefore, to induce different changes in lipoproteins in Type IIb and in Type IV hyperlipoproteinaemic patients. The practical implications of these results are discussed.

Adult↗
PubMed1984

Long-term effects of fenofibrate on serum lipids and on lipoprotein cholesterol in type II hyperlipoproteinemic patients.

Twenty two patients with primary type II hyperlipoproteinemia (13 phenotype IIa and 9 phenotype IIb) were treated with fenofibrate 300 mg a day for 4-12 months. Serum total cholesterol decreased, on the average, by 22 per cent and LDL cholesterol by 24 per cent. In the patients with familial hypercholesterolemia, total cholesterol decreased by 28 per cent and LDL cholesterol by 31 per cent. One patient with homozygous familial hypercholesterolemia showed the greatest fall of total and LDL cholesterol (44 and 48 per cent respectively) and this was accompanied by a nearly complete disappearance of xanthelasmas and xanthomas.

Adult↗
PubMed1984

Effect of D-glucitol-hexanicotinate on platelet aggregability in patients with coronary heart disease.

D-glucitol-hexanicotinate (sorbinicate) was administered at a daily dose of 1.6 mg to 16 male patients who had survived myocardial infarction. Platelet aggregation induced by collagen (5 micrograms/ml), by ADP (2, 1.2, 0.8, and 0.4 X 10(-6)M), and by epinephrine (1 and 0.5 X 10(-6)M) was significantly decreased after 3 months of therapy. In a group of 13 comparable patients, who did not receive sorbinicate, platelet aggregation induced by ADP (1.2, 0.8, and 0.4 X 10(-6)M) and by epinephrine (1 X 10(-5)M and 1 X 10(-6)M) was significantly increased 3 months after entry into the study. Sorbinicate has effective lipid-lowering activity; the combination of hypolipidemic and anti-aggregating properties may prove important in primary and secondary prevention of atherosclerotic disease.

Adenosine Diphosphate↗
PubMed1983

[Serum lipoproteins and coronary disease in diabetes. Changes in the lipoprotein pattern in relation to the type of antidiabetic therapy].

One hundred and fifty seven maturity-onset diabetics (77 males and 80 females) with coronary heart disease (CHD) were compared with 130 non-CHD diabetic patients (62 males and 68 females) of the same age-range. Integrated mean blood pressure, duration of diabetes, serum triglycerides, beta and prebeta-lipoproteins were significantly higher and alpha lipoproteins significantly lower in CHD than in non-CHD patients. Alpha lipoproteins, duration of diabetes and beta lipoproteins were the variables of highest weight in discriminating CHD from non-CHD patients. Alpha lipoprotein had a greater discriminating power than beta lipoprotein in man, while in women the opposite occurred. In patients on insulin and on sulfonylurea therapy, both with and without CHD, the concentration of alpha lipoproteins, but not of other lipoproteins, was higher than in the corresponding subgroups of the diet-treated patients. However, within each treatment group, patients with CHD had lower alpha lipoproteins.

Blood Pressure↗
PubMed1981

Increase in lipolysis and decrease in plasma-heparin lipoprotein lipase activity and alpha 1 lipoprotein level after aminophylline in man.

Intravenous aminophylline 0.48 g produced a sharp increase in plasma free fatty acids. After three days of treatment with aminophylline 0.96 g/day i.v., plasma post-heparin lipoprotein lipase was significantly reduced, and post-heparin hepatic triglyceridase remained unchanged. alpha 1 lipoprotein was reduced by treatment, in parallel with lipoprotein lipase, while other lipoprotein fractions, serum cholesterol and triglycerides were unaffected.

Adult↗
PubMed1981

Influence of two non-steroidal anti-inflammatory drugs on lipolysis and on plasma post-heparin lipoprotein lipase activity in normal man.

Indomethacin 50 mg i.v. or p.o. and diclofenac sodium 50 mg p.o. produced a prompt and significant increase in plasma free fatty acid concentration. In 10 subjects who took indomethacin 150 mg/d p.o. for 3 days, plasma post-heparin lipoprotein lipase activity was also significantly increased. The same effect occurred in 9 subjects treated for 3 days with diclofenac sodium 50 mg t.d.s. Since both indomethacin and diclofenac sodium are potent inhibitors of prostaglandin synthetase, these findings are consistent with the hypothesis tht prostaglandins are involved in the feed-back regulation of lipolysis, and mediate the inhibitory effect of lipolysis on lipoprotein lipase activity.

Adult↗
PubMed1981

Effects of acetylsalicylic acid on plasma lipids and on post-heparin lipase activities.

Acetylsalicylic acid (ASA) was administered orally at the dose of 3 g a day for 2 days to healthy subjects. Plasma free fatty acids, serum triglycerides and prebetalipoproteins were significantly decreased, while cholesterol, beta and alpha 1 lipoproteins did not change. The two fractions (protamine-resistant and protamine-inactivated) of plasma post-heparin lipoprotein lipase activity (PHLA) significantly fell after ASA. PHLA diminution was reproduced by direct addition of ASA or sodium salicylate or of plasma from individuals under treatment with ASA to post-heparin plasma of untreated subjects and is, therefore, explained by a direct inactivation. The inhibition of PHLA was not followed by a significant impairment of the removal of circulating triglycerides.

Adult↗