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排序方式: 共有101条查询结果,搜索用时 15 毫秒
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EA Dukhanina TI Lukyanova EA Romanova V Guerriero NV Gnuchev GP Georgiev DV Yashin LP Sashchenko 《Cell cycle (Georgetown, Tex.)》2015,14(22):3635-3643
PGRP-S (Tag7) is an innate immunity protein involved in the antimicrobial defense systems, both in insects and in mammals. We have previously shown that Tag7 specifically interacts with several proteins, including Hsp70 and the calcium binding protein S100A4 (Mts1), providing a number of novel cellular functions. Here we show that Tag7–Mts1 complex causes chemotactic migration of lymphocytes, with NK cells being a preferred target. Cells of either innate immunity (neutrophils and monocytes) or acquired immunity (CD4+ and CD8+ lymphocytes) can produce this complex, which confirms the close connection between components of the 2 branches of immune response. 相似文献
4.
A A Koval' A V Mazurov D V Vinogradov A V Rudin V S Repin 《Biulleten' eksperimental'no? biologii i meditsiny》1989,107(3):327-329
Enzyme-linked immunosorbent assay (ELISA) was developed for determination of serum antiplatelet antibodies. Platelets obtained from healthy donors of blood group 0(1) were washed off plasma and sedimented on the bottom of microtest wells. After washing off unattached platelets and blocking of plastic with albumin platelets were incubated with sera under investigation and binding of serum antibodies was detected using antihuman immunoglobulin antibodies conjugated with peroxidase. Ten patients with idiopathic thrombocytopenic purpura (ITP). 1 patient with systemic lupus erythematosus. 1 patient with red blood cell aplasia and 9 healthy donors (negative control) were studied by ELISA. Serum antibodies which effectively bound to platelets were detected in 5 patients with ITP, in patient with lupus erythematosus and in patient with red blood cell aplasia. 相似文献
5.
Production of soluble P-selectin by platelets and endothelial cells 总被引:10,自引:0,他引:10
Semenov AV Romanov YA Loktionova SA Tikhomirov OY Khachikian MV Vasil'ev SA Mazurov AV 《Biochemistry. Biokhimii?a》1999,64(11):1326-1335
The distribution of a soluble form of a cell adhesion molecule, P-selectin, in human platelets and cultivated endothelial cells has been studied by enzyme-linked immunosorbent assay (ELISA). The concentration of soluble P-selectin in the blood plasma of healthy donors and patients with abnormal platelet count has also been determined. P-selectin was measured in the Triton X-100 lysate of platelets and endothelial cells (total P-selectin), in the 100,000g supernatant obtained after sedimentation of the membrane fraction from the homogenate of sonicated platelets and endothelial cells (intracellular soluble P-selectin), in the supernatant of activated and nonactivated platelets, and in the culture medium of endothelial cells. A soluble form of P-selectin which did not coprecipitate with the membrane fraction was detected in platelets and accounted for approximately 10% of the total P-selectin. Platelet activation by thrombin, ADP, or a thromboxane A2 analog resulted in the secretion of 30-50% of the intracellular soluble P-selectin. Measurements of P-selectin in endothelial cell culture revealed that endothelium from aorta contained about twofold more P-selectin than endothelium from umbilical vein. Intracellular soluble P-selectin was identified in both types of endothelial cells. In endothelial cells from the umbilical vein this form made up approximately 10% of the total P-selectin. Soluble P-selectin was also detected in the medium of cultivated endothelial cells, where its content correlated with the total cellular P-selectin. Concentration of P-selectin in blood plasma strongly correlated with the platelet count in the blood of healthy donors and patients with thrombocytosis and thrombocytopenia. These data indicate that platelets serve as one of the main source of plasma P-selectin. However, the presence of P-selectin in the plasma of patients with severe thrombocytopenia suggests that endothelium can also be involved in plasma P-selectin production. Thus, in vitro experiments as well as measurements of plasma P-selectin have shown that both platelets and endothelial cells can produce a soluble form of the protein. Platelet-derived soluble P-selectin and plasma P-selectin were shown to react with antibodies against the cytoplasmic domain of P-selectin. These data prove that at least part of soluble P-selectin is produced by synthesis employing special mRNA which lacks the sequence encoding the transmembrane domain, but not by the proteolytic shedding of the extracellular portion of membrane P-selectin. 相似文献
6.
Mazurov AV Pevzner DV Vlasik TN Ruda MIa 《Rossi?skii fiziologicheski? zhurnal imeni I.M. Sechenova / Rossi?skaia akademiia nauk》2004,90(5):586-599
First Russian glycoprotein (GP) IIb-IIIa antagonist, preparation Monafram, is the F(ab')2 fragment of anti-GP IIb-IIIa monoclonal antibody FRaMon. In in vitro experiments it was shown that Monafram blocked platelet aggregation induced by ADP and thrombin; reduced secretion from platelet granules; and due to simultaneous interaction with two GP IIb-IIIa molecules almost irreversibly bound to platelet surface. Monafram clinical trials were performed in healthy volunteers (n = 10) and in patients with ischemic heart disease undergoing high risk coronary angioplasty (n = 153). Monafram intravenous bolus administration at 0.25 mg/kg decreased ADP-induced platelet aggregation by more than 90, 80, 60 and 30% at 1, 12, 24 and 72 h after injection, respectively. No significant differences were detected between antiaggregatory effects of Monafram and ReoPro introduced at 0.25 mg/kg bolus + 12 h infusion at 0.125 microg/kg per min. Durable inhibition of aggregation after Monafram administration was mediated by platelet-bound preparation--free Monafram was cleared from plasma within 12 h, while platelet-bound preparation occupied more than 90, 70-80 and 40-50% of GP IIb-IIIa at 1, 12-24 and 72 h after injection, respectively. Major bleedings and allergic reactions were detected in none of patients, deep thrombocytopenia--in one patient and antibodies against Monafram--in 5% of patients. Within one month after coronary angioplasty Monafram decreased the number of end points (fatal and nonfatal myocardial infarction and angina recurrence) from 11.4 to 3.3%. 相似文献
7.
Pinegin BV Iarilin AA Mazurov DV Dambaeva SV Klimova SV Bakhus GO 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》2002,(6):105-111
Some flow laser cytometry (FLC) techniques intended for studies of the immune system cells are reviewed. A widespread analytical method is the phenotyping of lymphocytes by the markers they express. The use of FLC permits the evaluation of practically all functional parameters of immunocompetent cells. Thus, to analyze their ingestive and microbicidal activity fluorochrome-labeled microorganisms are used. The apploication of indicator dyes makes it possible to evaluate calcium mobilization and formation of active forms of oxygen. FLC is used for the identification of cytokines inside the cell and in the medium. The authors propose tests for the analysis of the proliferative activity of lymphocytes, the cytotoxicity of natural killers, the evaluation of apoptosis and protein processing with monocytes/macrophages. 相似文献
8.
Pecherskiĭ AV Semiglazov VF Loran OB Karpishchenko AI Pecherskiĭ VI Mazurov VI 《Tsitologiia》2006,48(10):862-866
This research work is devoted to an important subject--study of the impulse regime of the incretion of a series of hormones among men with partial androgen deficience of aging men (PADAM). The results of this study suggest that PADAM leads to a breakdown of the impulse regime of incretion of a series of hormones, including luteinizing hormone (LH), follicle stimulating hormone (FSH), and somatotropic hormones (STH), as well as cortisol and insulin among men of older age groups. These changes accompany the development of metabolic syndrome (X-syndrome); their development can be inversed through androgen-replacement therapy. 相似文献
9.
Endocrine regulation of the reproduction in crustaceans: Identification of potential targets for toxicants and environmental contaminants 总被引:1,自引:0,他引:1
Edita Mazurová Klára Hilscherová Rita Triebskorn Heinz-R. Köhler Blahoslav Maršálek Luděk Bláha 《Biologia》2008,63(2):139-150
Progress in ecotoxicological research documents that crustaceans are highly vulnerable to diverse chemicals and toxicants
in the environment. In particular, pollutants affecting endocrine homeostasis in crustaceans (i.e., endocrine disruptors)
are intensively studied, and serious reproductive disorders have been documented. In this review, current knowledge about
the endocrine regulation of the crustacean reproduction is put together with the published ecotoxicological data with an attempt
to summarize the potential of xenobiotics to affect crustacean reproduction. Following gaps and trends were identified: (1)
Studies are required in the field of neurohormone (serotonin and dopamine) regulation of the reproduction and possible modulations
by environmental toxicants such as antidepressant drugs. (2) Molting-related parameters (regulated by ecdysteroid hormones)
are closely coordinated with the development and reproduction cycles in crustaceans (cross-links with methyl farnesoate signalling),
and their susceptibility to toxicants should be studied. (3) Other biochemical targets for xenobiotics were recently discovered
in crustaceans and these should be explored by further ecotoxicological studies (e.g., new information about ecdysteroid receptor
molecular biology). (4) Some sex steroid hormones known from vertebrates (testosterone, progesterone) have been reported in
crustaceans but knowledge about their targets (crustacean steroid receptors) and signalling is still limited. (5) Determination
of the sex in developing juveniles (affecting the sex ratio in population) is a sensitive parameter to various xenobiotics
(including endocrine disruptors) but its modulation by general environmental stress and non-specific toxicity should be further
studied. 相似文献
10.
I P Baskova G I Nikonov A V Mazurov F Missel'vits V L Le?tin 《Biokhimii?a (Moscow, Russia)》1987,52(9):1461-1468
The mechanism of inhibition of the vascular-platelet stage of hemostasis by medicinal leech salivary gland secretion was studied. It was shown that the secretion blocks platelet adhesion on the surface of collagens belonging to different genetic classes, inhibits the primary attachment of platelets and completely suppresses their spreading on collagen surface. Whatever its antithrombin activity, the leech secretion inhibits platelet aggregation stimulated by various inductors, e. g., ADP, prostaglandin endoperoxide analog U-46619, Ca2+ ionophore A23187, arachidonic acid. The secretion possessing the antithrombin activity causes a greater inhibition of the thrombin-stimulated aggregation than that devoid of this activity. Leech secretion stimulates adenylate cyclase of platelet membranes in a receptor-mediated fashion and increases the level of cAMP. The active substance is a low molecular weight, thermostable trypsin-resistant fraction of the secretion. Stimulation of adenylate cyclase is not mediated by adenosine receptors. It is supposed that the mechanism of this activating effect involves platelet prostaglandin receptors. 相似文献