PubMed Health⌕ Search

Biomedical subjects

A Opincaru

Publications and source records attributed to A Opincaru.

At least 19 recordsLinked to original sources
PubMed1978

Similar behaviour of lecithin:cholesterol acyltransferase and pseudocholinesterase in liver disease and hyperlipoproteinemia.

Using exogenous substrate for its assay, lecithin:cholesterol acyltransferase (LCAT) was found to be decreased in liver disease and higher than normal in endogenous hypertriglyceridemia. LCAT activity was positively correlated with serum cholesterol and triglyceride. However in the six patients with excessive hypertriglyceridemia (type V), LCAT activity was lower than in type IV hyperlipoproteinemia. LCAT activity was not changed significantly in type II-a hyperlipoproteinemia. A striking parallel was noted between plasma LCAT and serum pseudocholinesterase activity. It suggested that both these liver secretion enzymes might be induced by an accelerated turnover of serum lipids and lipoproteins. Pathogenical implications of these findings are briefly discussed.

Adult↗
PubMed1976

Increased serum gamma-glutamyltransferase in hypertriglyceridemia: comparison with serum pseudocholinesterase.

Both gamma-glutamyltransferase (gammaGT) and pseudocholinesterase (PCE) were found to be increased in hypertriglyceridemic subjects. High values of gammaGT were noted in alcoholic subjects and especially in those with either increased serum triglyceride or alanine aminotransferase higher than 16 mU/ml, while PCE was not significantly changed in alcoholic subjects. Although both enzymes were strongly correlated with the logarithm of serum triglyceride and the prebeta electrophoretic fraction, there were striking differences concerning their behavior in various hypertriglyceridemic subjects. PCE activity was high even in moderate hypertriglyceridemias but its correlation with serum triglyceride had a tendency to flatten with increasing concentration of triglyceride. However, increase of gammaGT was rather characteristic for gross hypetriglyceridemia. Short-term, triglyceride-lowering therapy was accompanied by a tendency to normalization of gammaGT, while PCE values were not influenced. An attempt was made to interpret these changes of serum-enzyme activity in hypertriglyceridemia in connection with mechanisms of lipoprotein synthesis and with the pathogeny of hyperlipemic conditions.

Adult↗
PubMed1975

Serum pseudocholinesterase and ceruloplasmin in various types of hyperlipoproteinemia.

Starting from previous observations emphasizing an increased pseudocholinesterase (PCE) activity in obese and hyperlipemic subjects, the behaviour of this enzyme and of ceruloplasmin was studied in connection with changes of serum lipids and lipoproteins in various types of hyperlipoproteinemia. When compared to values detected in 67 middle-aged normal weight normolipemic subjects, PCE activity was found to be significantly greater (smaller than 0.001) in the 49 overweight subjects without obvious hyperlipemia but presenting a moderate increase of the prebeta electrophoretic fraction. PCE activity was much higher in lean or overweight subjects with endogenous hypertriglyceridemia (68 patients with type IV and 86 patients with mixed hyperlipemia). The slight increase of mean values of PCE activity in the 53 subjects with type II-a was due mainly to overweight subjects, while this enzyme's activity was not significantly changed in lean subjects with pure hypercholesterolemia. PCE activity was positively correlated with serum triglyceride (r equals 0.540; p smaller than 0.001) and the prebeta electrophoretic fraction (r equals 610; p smaller than 0.001). The correlation with beta-lipoproteins was not significant. Ceruloplasmin levels were not significantly changed. It is suggested that elevation of PCE activity could be connected to mechanisms leading to an increased secretion rate of lipoproteins.

Adolescent↗
PubMedDate not supplied

Effects of some benzodiazepine derivatives on Triton WR-1339-Induced hyperlipidaemia in rats.

Oral administration of the benzodiazepines (diazepam, lorazepam, chlordiazepoxide, bipotassium chlorazepate) in Triton WR-1339-induced (200 mg/kg, blood collection 18 h later) hyperlipidaemia in rats elicited marked decrease of serum total lipids, total cholesterol and triglyceride levels, and alterations in free fatty acid and free glycerol content. The optimal doses for diazepam, lorazepam, chlordiazepoxide and bipotassium chlorazepate were estimated to be 5 mg/kg. Other benzodiazepines, namely oxazepam, medazepam and nitrazepam, elicited only minor changes in serum lipids levels, while with grandaxin no change was observed. The optimal doses of diazepam and lorazepam brought about the same changes in serum lipid content as did clofibrate (90 mg/kg, p. o.). If diazepam, lorazepam, chlordiazepoxide and bipotassium chlorazepate were administered in doses of 5 mg/kg in Triton WR-1339-treated rats (blood collection taken 3 h later), a significant decrease of total lipids and triglyceride levels was observed. The free glycerol level only altered after the administration of chlordiazepoxide, which brought about a significant reduction.

Animals↗