[Effect of C60 fullerene on viscoelastic properties of human erythrocytes membrane].

The effect of C60 fullerene aqueous colloid solution (C60FAS) on viscoelastic properties of human erythrocytes membrane has been studied. It was established that the effect of C60FAS on erythrocytes depends on the medium osmolality and concentration of C60 fullerene in it. In particular, in isotonic solution (0,15 mol/l NaCl) adding C60 fullerene in concentrations from 0,7 to 28 μmol/l did not cause the hemolytic damage of cells.

[The use of aluminum and its compounds for the biomedical purposes].

Taking into consideration the nanodimension of functional components of living cells, the application of nanotechnology in the biomedical purposes is currently an urgent task. One of these directions is the use of aluminum nanoparticles for molecular diagnostics, targeted delivery of drugs, the development of new pharmaceuticals. The action of aluminum chloride on the regulatory mechanisms of smooth and skeletal muscle contraction and also the effect of aluminum ions on the ATPase activity and superprecipitation of actomyosin of different types of muscles is discussed.

[Effect of pH changes on myosin ATP-ase activity of the skeletal muscle].

The influence of pH medium on ATP-ase activity of skeletal muscles myosin has been investigated. The mathematical simulation, which reflects the ATP-hydrolase biochemical reactions after pH medium changes in the muscular fiber was also carried out.

[Kinetic analysis of the influence of inverse effectors (inhibitors and activators) on enzymatic (transport) activity of proteins].

The method is proposed for calculation of the most important parameters of the two-stage enzymatic or transport process--modification factors alpha and beta (which characterize the effector action mechanism) as well as the inhibition constant K(i) or activation constant K(a) (characterize the effector affinity for protein). The method was derived as based on the analysis of kinetic regularities of the action of reversible effectors (inhibitors and activators) on the catalytic (transport) activity of proteins. The method is based on the titration of enzymatic (transport) protein by the substrate with the absence and with presence of the effector taken in one of concentrations as well as determination (under the fixed substrate concentration) of the inhibition coefficient i(0.

[Kinetic interpretation of the original pH-dependence of enzymatic activity of "basal" Mg(2+)-ATPase of the smooth muscle sarcolemma].

It was demonstrated in experiments made on a fraction of plasma membranes of the uterine smooth muscle cells that PH-dependence of enzymatic activity of the "basal" (Ca(2+)-independent) Mg(2+)-ATPase obtained under the conditions of determining the initial velocity of ATP hydrolysate is not bell-shaped but is characterized by linearity in the range of the values of hydrogen index 6.0-8.0.

[Mathematical model of trans-sarcomere exchange of calcium ions and Ca2+-dependent control of smooth muscle contractile activity].

The mathematical model of smooth muscles contractile activity Ca(2+)-dependent control has been proposed on the base of Ca ions trans-sarcomal exchange biochemical mechanisms interpretation in myocytes. While analysing the model the conclusion should be made that kinetic parameters changes (in relation to Ca ions) Mg2+, ATP-dependent calcium pump of plasma membrane--Michaelis constant Km and transport process maximal velocity Vmax-render the effect on the character of the intracellular calcium transients and profile of full mechanokinetic curve. As well one more conclusion has been made that plasma membrane Mg2+, ATP-dependent calcium pump, which kinetic parameters under the physiologic conditions are subjected to modulation as the result of metabolic, pharmacologic and physico-chemical factors fulfills the essential role in supplying Ca(2+)-dependent control of the smooth muscles contractile response full cycle.