The transcription factor ERG regulates a low shear stress-induced anti-thrombotic pathway in the microvasculature.

Endothelial cells actively maintain an anti-thrombotic environment; loss of this protective function may lead to thrombosis and systemic coagulopathy. The transcription factor ERG is essential to maintain endothelial homeostasis. Here, we show that inducible endothelial ERG deletion (ErgiEC-KO) in mice is associated with spontaneous thrombosis, hemorrhages and systemic coagulopathy. We find that ERG drives transcription of the anticoagulant thrombomodulin (TM), as shown by reporter assays and chromatin immunoprecipitation. TM expression is regulated by shear stress (SS) via Krüppel-like factor 2 (KLF2). In vitro, ERG regulates TM expression under low SS conditions, by facilitating KLF2 binding to the TM promoter. However, ERG is dispensable for TM expression in high SS conditions. In ErgiEC-KO mice, TM expression is decreased in liver and lung microvasculature exposed to low SS but not in blood vessels exposed to high SS. Our study identifies an endogenous, vascular bed-specific anticoagulant pathway in microvasculature exposed to low SS.

[Comparative analysis of amphetamine identification by immunoenzyme assay and gas chromatography with mass spectrometric detection].

The objective of this study was to simultaneously identify amphetamine in biological materials by enzyme-linked immunosorbent assay (ELISA) and gas chromatography with mass spectrometric detection (GH/MS) for the verification of diagnostic value of the proposed ELISA technique. Urine samples from suspected amphetamine and related drug users were available for analysis. It is concluded that the new modification of ELISA can be recommended for application in narcological practice and for the purpose of forensic medical examination.

[The catalase activity and lipid peroxidation of donor blood under ultraviolet irradiation]. / Katalaznaia aktivnost' i perekisnoe okislenie lipidov donorskoi krovi pri ul'trafioletovom obluchenii.

Under study were catalase activity and indicators of lipid peroxidation (LP) of donor blood exposed to different doses of UV irradiation. Doses lower than 630 J/m2 were found to activate catalase and to inhibit LP while doses higher than 630 J/m2 inhibited catalase activity and activated LP. The indicators of LP have confirmed that therapeutic doses of UV-irradiated blood were nontoxic. The most optimal therapeutic dose of irradiation (630 J/m2) was determined.

[Ultraviolet irradiation of blood in surgery]. / Ultrafioletovoe obluchenie krovi v khirurgii.

The results of complex treatment of 81 patients with pyoinflammatory diseases with the use of blood ultraviolet irradiation are discussed. A marked clinical effect was noted, the terms of treatment reduced by 5-10 days, the outcomes improved, and the number of complications decreased. Irradiation of autologous blood by ultraviolet rays led to modulation of the indices of antimicrobial protection, increase of the intensity of the histochemical reaction to peroxidase up to 40-50%, and diminution of pH in the neutrophil phagosomes to 5.0. The ultrastructure and ability of thrombocytes to store serotonin were restored, and intensity of their metabolic processes increased, the membrane phospholipid composition changed, and juvenile platelet forms appeared.

[Blood lipase activity in cancer patients]. / Lipaznaia aktivnost' plazmy krovi u onkologicheskikh bol'nykh.

Blood plasma lipoprotein lipase level was measured in lung and stomach cancer patients before surgery and during postoperative period. A drop in the enzyme level was observed, particularly, in patients at stage IV. Postoperative infusion and drug therapy was followed by increase in the enzyme activity in stage III disease whereas at stage IV, only a tendency of lipoprotein lipase to rise was observed. Deterioration in patient condition led to a sharp decrease in the enzyme activity.