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V V Kosnikov

Publications and source records attributed to V V Kosnikov.

7 recordsLinked to original sources
PubMed1991

Depolarizing action of allergens on passive sensitized lymphocytes.

An ability of rat thymus lymphocytes to respond to pollen allergens has been found. The lymphocytes were exposed with plasma of pollinosis patients. The subsequent addition of allergens specific for the patient caused the decrease of lymphocyte plasma membrane potential. The decrease was detected by use of potential-sensitive fluorescent probe 4-(p-dimethylaminostyryl)-1-methylpyridinium. This newly found effect can be employed for diagnostics of atopic states.

Allergens↗
PubMed1990

[The effect of the plasma of patients with asthma of physical effort on the energy state of the lymphocytes].

The effect of the plasma obtained before and after graded submaximal exercise was examined in 10 bronchial asthma patients with the syndrome of asthma of physical effort (APE) by means of fluorescent exploration using the cation probe 4-(p-demethylaminostyryl)-1-methylpyridinum and rat thymocytes as a test system. Four normal donors and five bronchial asthma patients without the APE syndrome were used as control. The plasma of patients with the APE syndrome, obtained after physical exercise, brought about a decrease of the number of fluorescent cells. In APE patients, the coefficient of the drop of thymocyte fluorescence amounted to 0.65 +/- 0.04, that in the control group to 1.1 +/- 0.08 (p less than 0.01). It is assumed that after physical exercise in the plasma of APE patients, there may occur factor depolarizing the membrane of thymocytes, which is likely to play a substantial role in the pathogenesis of the afterload bronchospasm.

Adult↗
PubMed1989

[Ryodipine--a new fluorescent probe in the determination of differences between lymphocytes].

Ryodipine (foridon ), a fluorescent compound possessing hypotensive activity, can be useful as fluorescence probe to distinguish between lymphocyte populations. The heterogeneity of cells revealed by the intensity of ryodipine fluorescence is mainly due to differences in the amount of membranous material in the cells. The use of ryodipine for lymphocyte identification has certain advantages over MBA, a known fluorescence probe generally employed for this purpose. Ryodipine is less prone to photodegradation and its fluorescence intensity shows no dependence on cell concentration over a much wider dye/cell ratio range.

Animals↗
PubMed1987

[Effect of lymphocytes on the differentiation of in vitro transformed L-line mouse fibroblasts].

Possible participation of immune system cells in the differentiation of non-lymphoid tissues has been examined. Lymphocytes were tested on transformed fibroblasts of L mouse strain. The presence of lymphocytes in L cell culture enhanced their differentiation, assessed by morphological, proliferative and biophysical criteria. The induction of L-cell differentiation took place during contact and short-distant interaction both with mouse and human lymphocytes. The phenomenon had a stable character, as it was revealed in L cells separated from lymphocytes during passaging. The results obtained indicate real and potential abilities of the immune system to affect differentiation of proliferating non-lymphoid tissues.

Animals↗
PubMed1980

[Differences between lymphocytes revealed by membrane fluorescent probes].

Interaction of fluorescent probes of 3-methoxybenzanthrone (MBA), 4-dimethylaminochalcone (DMC), and of 1-anilinonaphthalene-8-sulfonate (ANS) with suspensions of rat thymocytes and Peyer's patches lymphocytes has been investigated. By means of the MBA, shown earlier to be a maker of B- and T-lymphocytes, it was established that thymus lymphocytes populations consisted mainly of T-cells (95 +/- 3%), and those of Peyer's patch lymphocytes of B-cells (68 +/- 9%). Definition of parameters of binding and fluorescence of ANS and DMC has shown different physical structure of the thymus and Peyer's patch lymphocyte membranes, resp. This is suggested by differences in binding constant of ANS, and in anisotropy of fluorescence of DMC. The difference in the number of binding sites gives evidence in favour of the fact that Peyer's lymphocytes have a greater membrane mass than thymocytes. T- and B-lymphocyte cells are likely to vary in their own structure and in the number of their membranes.

Anilino Naphthalenesulfonates↗
PubMedDate not supplied

[Methods of measuring the transmembrane electrical potential in cells].

The methods of intracellular microelectrodes, penetrating ions and potential-sensitive fluorescent probes are considered for their possibility to be used for quantitative estimation of transmembrane electrical potentials (TMP) of small cells (mainly through the example of lymphocytes). The following fluorescent methods are described in detail: separate measurement of two TMP components--potentials on the plasma and mitochondrial membranes of a cell; recording of individual differences of cells according to the TMP value. It is supposed that heterogeneity of cells by the TMP value (in particular, the presence of depolarized cells) may be responsible for errors and divergences of the TMP mean values measured by different methods.

Female↗