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PubMed1989

Quantitative histoenzymological characteristics of the myocardium in sudden cardiac death.

Enzymes in the human myocardium following sudden death were examined for activity in a quantitative histoenzymological study, these were NAD-dependent dehadrogenases of succinate (SDG), lactate (LDG), beta-hydroxybutyrate (beta-HOBDG), alpha-glycerophosphate (alpha-GPDG), alcohol (ADG), glucoso-6-phosphate (G-6-PDG), and NAD-diaphorase (NADse), and catalase. Autopsies were performed within 3 h after death. beta-HOBDG and LDG were found to show an increase in activity in the cardiomyocytes of sudden death subjects with coronary heart disease without apparent changes. In the myocardium from death subjects with coronary heart disease and large postinfarct cardiosclerosis, the activity of the enzymes was directly related to the severity of myocardial hypertrophy and signs of chronic heart failure. As myocardial hypertrophy developed, the enzyme activity increased; when there appeared signs of chronic heart failure it decreased. The myocardium from sudden death subjects with alcoholic cardiomyopathy showed diminished redox enzyme activity and higher activity of the enzyme utilizing alcohol (ADG and catalase). The findings suggest that changes in the enzyme activity in the myocardium are of various type and depend on previous cardiac abnormalities.

Adult↗
PubMed1989

[A histochemical study of enzyme activity in the myocardium of victims of sudden death with small-focal cardiosclerosis].

On the material of early autopsies of the above patients the activity of the following myocardial enzymes was undergone the quantitative histochemical study: succinate, lactate, (beta-oxybutyrate, d-glycerophosphate, glucose 6-phosphate and alcohol dehydrogenase, NAD-diaphorase, catalase, phosphorylase. The increase of the activity of practically all enzymes studied was observed in the myocardial areas with no circulation disturbances. This increase was due to the moderate myocardial hypertrophy. On the contrary, in the areas with a non-even blood supply (ischemia) the decrease of the activity of all oxidative-reductive enzymes was observed. The presence of such foci in the myocardium which occur in 70% cases studied facilitates the development of the ventricular fibrillation with a fatal outcome. The enzyme depression is particularly pronounced against the background of a high alcoholic content.

Alcohol Dehydrogenase↗
PubMed1979

[Activity of a number of enzymes in the splenic T- and B-lymphocytes of CBA strain mice].

The activity of some enzymes in T- and B-lymphocytes from the spleen of CBA mice was investigated. T-cell suspension was obtained by using a modified Kedar et al. method based on immunosorption. EAC-rosette forming cells were studied in the capacity of B-cells. The activity of all the enzymes examined proved to be higher in T-lymphocytes than in B lymphocytes; the greatest difference was noted in the activity of NADP.H2-diaphorase, and the least--in the activity of NAD.H2-diaphorase.

Animals↗
PubMedDate not supplied

[Effect of gamma-irradiation on the enzyme activity of cerebrospinal fluid lymphocytes in dogs].

Cytochemical activity of succinate dehydrogenase (SDG), L-glycerophosphate dehydrogenase (L-GPDG), lactate dehydrogenase (LDG), and glutamate dehydrogenase (GDG) increased immediately after total-body irradiation with a dose of 129 mC/kg. After 2 h, LDG activity only returned to the control level. Irradiation of the head with the same dose caused less pronounced changes. Changes caused by lethal irradiation (1290 mC/kg) were different: there was an increase after exposure of the abdomen and a decrease in the activity of SDG and L-GPDG after irradiation of the head.

Animals↗
PubMed1985

[Cytochemical determination of the enzyme activity of cerebrospinal fluid lymphocytes in dogs].

Cytochemical methods commonly used in hematology were applied to studying the liquor lymphocytes of dogs. According to our observation of decreasing their activity, the enzymes examined are placed in the following order: alpha-glycerophosphate, glutamate, lactate, and succinate dehydrogenase. High and reliable values of asymmetry and excess coefficients show the absence of the normal distribution of enzymatic activity in the investigated population of lymphocytes.

Animals↗