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Biomedical subjects

G A Ermolin

Publications and source records attributed to G A Ermolin.

At least 55 records · Page 3Linked to original sources
PubMed1986

[Determining myoglobinemia in acute myocardial infarction by the immunoenzyme method].

Like radioimmunoassay, immunoenzyme assay permits detecting myoglobinemia both in healthy persons and in patients with acute myocardial infarction (AMI). In AMI patients, myoglobinemia reaches a maximum 5 to 12 hours since the onset of a powerful anginal attack whereupon it gradually and spasmodically decreases, without returning to normal toward outcome of the 3d day of the observation period. A single assay of myoglobinemia in AMI patients is of diagnostic importance within 2 to 27 hours since the disease onset.

Adult↗
PubMed1986

[Plasma fibronectin level in newborn infants with suppurative inflammatory diseases].

The level of plasma fibronectin was determined in healthy newborns (45 plasma samples were examined in the control group) and in newborns with pyo-septic diseases (67 plasma samples were examined) by the immunoenzyme method (on the basis of the "sandwich" modification of the immunoenzyme analysis). Noticeable hypofibrinectinemia was observed in the infants with pyo-inflammatory diseases, particularly in cases of generalized forms. Combined modality etiopathogenetic therapy including i.v. plasma transfusion, did not exceed fibronectin deficiency in clinical convalescence of infants. Fibronectin deficiency is regarded as a risk factor of the development and generalization of pyo-inflammatory diseases.

Acute Disease↗
PubMed1986

[Decreased effectiveness of cold-induced heparin precipitation of plasma fibronectin in infection].

Plasma fibronectin (FN) is one of the major blood opsonins. The content of the glycoprotein reduces in sepsis which in turn may aggravate the course of the infection. FN is detectable in the content of cryoglobulins and cryofibrinogen. The formation of the heparin precipitate following plasma incubation in the cold in the presence of heparin is determined by FN involvement. Fibrinogen (FG) is another main component of the heparin precipitate. To determine the functional activity of plasma FN in sepsis and other pathological conditions, a study was made of the ability of FN and FG to go into the precipitate formed in blood plasma in the cold after its incubation with heparin. Unlike normal subjects in whom over 80% of FN on the average and about 20% of FG went into the heparin precipitate, in patients with hemoblastoses and aplastic anemia complicated by sepsis, less than 40% of FN on the average and about 7% of FG went into the precipitate. In some patients with sepsis, the heparin precipitate did not form. The reduction of FN ability to go into the heparin precipitate correlated with the gravity of the patients' condition. In uncomplicated hemoblastoses, cryoglobulinemia and cryofibrinogenemia and in immunocomplex pathology, the consumption of FN and FG during heparin precipitate formation did not significantly differ from the control. The data indicate that sepsis patients with blood system pathology may develop not only quantitative FN deficiency in the blood but also disorder of the functional activity of the opsonin.

Adolescent↗
PubMed1985

Enzyme-linked immunoreceptor assay of low-density-lipoprotein receptors.

A new modification of enzyme immunoassay-enzyme-linked-immunoreceptor assay (ELIRA) was used to study low-density lipoprotein (LDL) binding by cultured human skin fibroblasts. Time-course and concentration curves obtained by this method were typical of LDL binding by cultured fibroblasts. According to ELIRA, fibroblasts bound native LDL 10-20 times more effectively than reductively methylated LDL or native LDL in the presence of heparin. Receptor-specific Km and maximum binding capacity calculated from these data were 5.4 micrograms/ml and 177.5 ng/mg of cell protein, respectively. Receptor-specific Km and maximum binding capacity for surface 125I-LDL binding measured in the same experiment were 11.0 micrograms/ml and 138.0 ng/mg of cell protein. Incubation of cells with isolated LDL or with unfractionated serum containing the same amount of apoB yielded similar concentration curves for lipoprotein binding. These data indicate that the ELIRA can be used for investigation of receptor-mediated lipoprotein binding without purification of lipoproteins.

Apolipoproteins B↗
PubMed1985

[Diagnostic test systems based on the immunoenzyme method in leprosy].

Diagnostic test systems for the detection of IgG and IgM to Mycobacterium leprae in the blood sera of leprosy patients and armadillos experimentally infected with M. leprae have been developed on the basis of the indirect immunoperoxidase assay. The possibility has been shown of prognosing the activity of the leprotic process in leprosy patients and the results of the experimental infection of armadillos by the dynamic increase of antibody reactions with the development of the infection.

Adult↗
PubMed1985

[Obtaining antisera to Pseudomonas aeruginosa and Proteus antigens for performing immunoenzyme analyses in clinical practice].

The data presented in this work indicate that specific antisera to P. aeruginosa and Proteus antigens can be produced by using extracts from these microorganisms, destroyed by ultrasonic treatment or by multiple freezing and thawing, for the immunization of rabbits. Blood serum samples from patients with purulent septic complications were studied for the presence of P. aeruginosa and Proteus antigens in ELISA with the use of peroxidase-labeled antibodies from antisera to P. aeruginosa and Proteus. This investigation revealed that during the first 3 days from the beginning of the clinical manifestations of the complications P. aeruginosa and Proteus antigens were detected in 86.4% and 83.4% of the patients, respectively. In the subsequent bacteriological study of wound discharge from these patients the corresponding microflora was detected.

Animals↗
PubMed1985

[Dynamics of blood fibronectin level in myocardial infarction].

The fibronectin level in the blood of patients with myocardial infarction was measured at varying times from the onset of an angina pectoris attack in order to elucidate the diagnostic importance of blood fibronectin. At the same time these patients were examined over time for the blood content of myoglobin, MB creatine kinase protein and C-reactive protein playing a well-known role in the diagnosis. The blood concentrations of these substances reached the maximal values at different times of myocardial infarction. The mean concentrations of fibronectin in the blood of patients with myocardial infarction ranged within normal starting from the first till the 28th day since the onset of an angina pectoris attack. Moreover, the mean blood fibronectin level in myocardial infarction patients did not differ within the first-third days since the disease onset from that in patients with a clinical picture of unstable angina pectoris which was not accompanied by the development of myocardial infarction. Based on the data obtained it is concluded that measurement of blood fibronectin level does not play any diagnostic role in myocardial infarction. On the other hand, progressive increase in blood fibronectin level throughout 4 weeks starting from the 3d day of the disease and a significantly higher fibronectin content on the 28th day as compared with that on the 3d day is likely to mirror the activity of repair processes occurring in the myocardium.

C-Reactive Protein↗
PubMed1985

[Plasma fibronectin level in patients with depression of hematopoiesis].

Plasma fibronectin is regarded to play an important part in a decrease of the resistance to infections. To specify the role of fibronectin in the pathogenesis of infectious complications in patients with depressions of hemopoiesis, the content of this opsonin was measured by ELISA in 113 patients with different patterns of hemoblastoses, lymphoproliferative diseases and with an aplastic syndrome. In 42 patients, the concentration of opsonin was measured in the presence of the superimposed infection of varying gravity. The fibronectin content was examined in 39 patients before, during and after completion of the cytostatic polychemotherapy. It turned out that in patients with paraproteinemic hemoblastoses, lymphogranulomatosis, aplastic anemia, chronic lympholeukemia, acute lympho- and myelo(mono)blastic leukemias, cyclic neutropenia, chronic myelosis and hematosarcomas, the concentration of fibronectin remained normal in the absence of infections. The computation of the linear correlation ratio did not reveal any association between the opsonin level and the concentration of neoplastic elements in the peripheral blood. Repeated measurements of the fibronectin level in patients whose underlying disease ran its course in association with marked neoplastic fever failed to detect any deficiency of the glycoprotein. The lowering of the fibronectin level was recorded in patients with a grave concomitant infection of the type of sepsis, necrotic enteropathy and lobar pneumonia. The degree of opsonin deficiency correlated with the patients' disease gravity. Prolonged reduction in the blood fibronectin level was of unfavourable prognostic importance. Cytostatic polychemotherapy, myelotoxic agranulocytosis as well as infectious complications of low gravity did not influence the concentration of fibronectin.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗