Irina V Rybina

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Endothelial cells contain leukotriene (LT) A4 hydrolase (LTA-H) as detected by Northern and Western blotting, but several studies have been unable to detect the activity of this enzyme. Since LTA-H could play a key role in determining what biologically active lipids are generated by activated endothelium during the inflammatory process, we studied possible(More)
Vascular adhesion protein-1 (VAP-1) has been implicated in the pathogenesis of inflammatory diseases and is suggested to play a role in immune cell trafficking. It is not clear whether this effect is mediated by the oxidase activity or by other features of the protein such as direct adhesion. In order to study the role of VAP-1 oxidase activity in vivo, we(More)
In this study we have investigated the binding characteristics of creatine kinase (CK) with mitochondrial membrane. Creatine kinase was found to bind membranes by electrostatic forces. At physiological pH, the interaction seems to be between positively charged groups on the enzyme protein and negatively charged groups on the membrane.
An original experimental setup has been designed that allows evaluation of the free preference of space containing tobacco smoke by small laboratory animals. For the laboratory mice (C57B1/6 and BALB/c) and rats (MNRA and MR) placed every day into this box, no emotional-stress reaction (ESR) caused by the environment novelty was observed on the 19th day of(More)
The outer mitochondrial membrane of beef heart was disrupted by hypotonic treatment and the effects of concentration and ionic strength of creatine kinase substrate solutions and some other electrolytes and non-electrolytes on mitochondrial membrane creatine kinase were studied. It was shown that electrostatic forces play an important role in the binding of(More)
Leukotriene A4 hydrolase (LTA-H) is a bifunctional protein that has aminopeptidase activity, but also contains an epoxide hydrolase activity that converts leukotriene (LT)A4 to LTB4. The lipid metabolic activity of this enzyme plays a central role in the control of polymorphonuclear leukocyte function and in the development of inflammation. LTA-H is widely(More)
Creatine kinase from pigeon breast muscle was obtained in a homogeneous (as evidenced from polyacrylamide gel SDS electrophoresis) state. The molecular mass of the enzyme monomer is 43,000. Ultracentrifugation in a sucrose density gradient and gel filtration revealed that the enzyme is present in solution as a mixture of two major forms, i.e., octamer and(More)
The metabolic rate of 14C-phenazepam (14 mg/kg) in male C57BL/6 and BALB/c mice and F1 hybrids (BALB/c X C57BL/6) and the anticonvulsant effect of the tranquilizer in hybrid mice were studied. It was demonstrated that oxidation of the phenazepam molecule in the third position in BALB/c mice and in F1 hybrids proceeded at a higher rate than in C57BL/6 mice.(More)