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Biomedical subjects

V V Karpitskiĭ

Publications and source records attributed to V V Karpitskiĭ.

At least 19 recordsLinked to original sources
PubMed1989

[Changes in the activity of angiotensin-converting enzyme of the lung and systemic hemodynamics in spontaneously hypertensive rats under the effect of galvanic current].

It was shown, that local influence of galvanic current upon the lung angiotensin converting enzyme (ACE) in spontaneously hypertensive rats led to a decrease of systemic blood pressure in consequence of reduced peripheral vascular resistance. The development of the hemodynamic alteration was accompanied by variations of physiological and biochemical indices of the lung ACE-activity. These results indicate that the ACE-dependent processes in the lung play on important role in the mechanisms of vasoconstriction, increase in vascular resistance and development of arterial hypertension.

Animals↗
PubMed1985

[Regional changes in the activity of the angiotensin-converting enzyme in the brain of rats with developing hereditarily induced hypertension].

Angiotensin-converting enzyme (ACE) activity in the pituitary zone and 7 other brain areas has been studied in rats with developing spontaneous hereditary hypertension. ACE activity was significantly different in normotensive and spontaneously hypertensive rats, with the differences most prominent in pituitary body, cerebellum, striatum and medulla oblongata. Age-dependent variability in ACE activity was demonstrated.

Aging↗
PubMed1983

[Angiotensin converting enzyme activity in the blood and lung tissue of spontaneously hypertensive rats].

Angiotensin-converting enzyme (ACE) activity in blood serum and lung tissue was studied in spontaneously hypertensive rats. ACE activity in blood serum and lung tissue in normotensive and spontaneously hypertensive rats (SHR) was significantly different. In normotensive rats (NTR), ACE activity in serum was much higher than in SHR. In the lung tissue, the differences were less marked. During ontogenetic development, NTR demonstrated a decrease in ACE activity in serum and an increase in lung tissue, while SHR showed the total decrease in the enzyme activity.

Animals↗
PubMed1983

[Human low molecular weight kininogen: preparation, purification and immunochemical properties].

A purified preparation of low molecular weight kininogen (LMWK) (Mr = 70 000+ +2 000) has been obtained from human blood plasma. The kinin content per 1 mg of the obtained preparation is 14--16 micrograms of bradykinin. A rabbit antiserum to LMWK which is free of antibodies against IgG and albumin present as admixtures in the kininogen preparation has been obtained. The titer of the antiserum as measured by dilution of antibodies, with normal human blood plasma as an antigen source, is 1 : 16. 1 ml of the antiserum binds 125 micrograms of purified LMWK in the equivalence zone. Immunoelectrophoretic studies of the antiserum to LMWK revealed three precipitation arcs with human plasma. It was assumed that these immunocomplexes are formed with a low and high molecular weight forms of kininogen and, possibly, with a high molecular weight kininogen complex with prekallikrein.

Antigen-Antibody Complex↗
PubMed1978

[Changes in the peripheral blood lymphocytes after immunization and its effect on the course of experimental inflammatory process in the lungs].

It was shown that in the immunization of rabbits with sorbed staphylococcus toxoid and human albumin, at the height of the immune response there occurred an intensification of biosynthesis and destabilization of lysosomal membranes of blood leukocytes, with a simultaneous development of microcirculation disturbances in the lungs. Development of pneumonia against the background of immunization led to a greater destabilization of the lysosomic membranes of leukocytes and to the intensification in the lungs of infiltrative and destructive processes, in comparison with the course of inflammation in the nonimmunized animals. Peculiarities of the antigens used caused some specificity in the course of pneumonia. A relationship between the changes of blood leukocytes and disturbances in the lungs in immunization is supposed.

Acid Phosphatase↗
PubMed1975

[Identification of proteases of staphylococci by means of an antitrypsin precipitating serum].

Specific antitrypsin precipitating sera obtained by intraconjunctival immunization of rabbits with crystalline trypsin was used to reveal in the supernant of staphylococcal cultures protease having antigenic character common with that of trypsin. This is confirmed by the trypsin accumulation in the process of staphylococcus cultivation, by the inhibition of the proteolytic activity of the antitrypsin precipitating sera and by the production of protein-precipitate as a result of incubation of the supernant with the antitrypsin precipitating sera.

Antigens↗
PubMedDate not supplied

[Contact-activated and immunoreactive prekallikrein in the plasma of patients with hypertension].

Alterations in activity of kaolin-activated (contact-activated, CA) and immunoreactive (IR) prekallikrein were studied in blood plasma of healthy persons and of patients with hypertension under conditions of rest and of dose-dependent physical loading. CA prekallikrein was dissimilarly altered depending on the type of hemodynamic structure of the pressure reaction (arterial pressure): content of CA prekallikrein was increased in hyperkinetic type and--decreased in hypokinetic type. Content of IR prekallikrein, measured by means of radial immunodiffusion using monospecific antiserum, was similar in healthy persons and in the patients at rest and after physical exercises. It was increased slightly but did not correlate with CA prekallikrein alterations. As content of CA- and IR-prekallikreins did not correlate in the disease dynamics and after physical exercises, functional impairments may cause activation of blood plasma prekallikrein in hypertension. A procedure for isolation of highly purified preparation of kallikrein, production of monospecific antiserum to prekallikrein are described. Immunochemical studies and quantitative estimation of IR-prekallikrein were carried out.

Enzyme Activation↗