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21.
Ikaunieks M Shestakova I Domracheva I Belyakov S Madre M 《Nucleosides, nucleotides & nucleic acids》2007,26(10-12):1269-1271
New 2-amino-6-oxo-8-thioxo-9-substituted purine derivatives were prepared and assayed for the in vitro cytotoxic activity. Some products exhibited moderate activity on HT-1080 cells and rather high activity on MG-22A cells. 相似文献
22.
Deev SL Yasko MV Karpenko IL Korovina AN Khandazhinskaya AL Andronova VL Galegov GA Shestakova TS Ulomskii EN Rusinov VL Chupakhin ON Kukhanova MK 《Bioorganic chemistry》2010,38(6):265-270
A new class of inhibitors of herpes simplex virus replication was found. The compounds under study are derived from condensed 1,2,4-triazolo[5,1-c][1,2,4]triazines and 1,2,4-triazolo[1,5-a]pyrimidines, structural analogues of natural nucleic bases. Antiherpetic activity and cytotoxicity of the compounds were studied. The corresponding triphosphates of several active compounds were prepared and tested as inhibitors of DNA synthesis catalyzed by herpes simplex virus polymerase. The potential mechanism of their action is blocking of DNA dependent DNA polymerase, a key enzyme of viral replication. 相似文献
23.
Anna Shestakova Abraham Hanono Stacey Drosner Matt Curtiss Brian A. Davies David J. Katzmann Markus Babst 《Molecular biology of the cell》2010,21(6):1059-1071
Vps4 is a key enzyme that functions in endosomal protein trafficking, cytokinesis, and retroviral budding. Vps4 activity is regulated by its recruitment from the cytoplasm to ESCRT-III, where the protein oligomerizes into an active ATPase. The recruitment and oligomerization steps are mediated by a complex network of at least 12 distinct interactions between Vps4, ESCRT-III, Ist1, Vta1, and Did2. The order of events leading to active, ESCRT-III–associated Vps4 is poorly understood. In this study we present a systematic in vivo analysis of the Vps4 interaction network. The data demonstrated a high degree of redundancy in the network. Although no single interaction was found to be essential for the localization or activity of Vps4, certain interactions proved more important than others. The most significant among these were the binding of Vps4 to Vta1 and to the ESCRT-III subunits Vps2 and Snf7. In our model we propose the formation of a recruitment complex in the cytoplasm that is composed of Did2-Ist1-Vps4, which upon binding to ESCRT-III recruits Vta1. Vta1 in turn is predicted to cause a rearrangement of the Vps4 interactions that initiates the assembly of the active Vps4 oligomer. 相似文献
24.
The effect of biguanide derivatives on antioxidant status during the development of oxidative stress
T. N. Popova O. A. Safonova T. I. Rakhmanova T. N. Shestakova E. D. Kryl’skii 《Applied Biochemistry and Microbiology》2017,53(1):25-30
The intensity of free radical processes, activity of antioxidant enzymes (superoxide dismutase, catalase), and the content of low molecular weight antioxidants (reduced glutathione, citrate) in skeletal muscle and liver from rats with experimental rheumatoid arthritis administered with biguanide synthetic derivatives (2,4-dicarbomethoxyphenyl-biguanide and 4-methyl-phenyl biguanide) selected by Prediction of Activity Spectra for Substances (PASS), a computer program for the prediction of biological activity, were studied. The observed changes in the studied parameters toward the reference values under the effect of tested compounds can be explained by their antioxidant and protective properties during pathology, which are accompanied by oxidative stress. The results can be used for the development of new methods for the prevention and treatment of rheumatoid arthritis. 相似文献
25.
Elena A. Shestakova Ludmila P. Motuz Lydia P. Gavrilova 《Cell biology international》1993,17(4):417-424
The distribution of eukaryotic elongation factor 2 (eEF-2) in G0-arrested fixed human skin diploid fibroblasts was studied by indirect immunofluorescent microscopy. It was found earlier that the main part of eEF-2 in cycling cells was located near the nucleus in the endoplasm (Gavrilova et al., 1987). It has been demonstrated here that the transition from proliferation to the G0 phase of the cell cycle leads to the distribution of eEF-2 mainly along the intermediate filaments and/or microtubules. Both in cycling and in G0-arrested fibroblasts a portion of eEF-2 is also co-localized with actin microfilament bundles. The reversion of the cells from the G0 phase to proliferation is accompanied by rearrangement of the actin cytoskeleton and reversal to the original pattern of eEF-2 distribution. It is likely that the different types of cytoskeleton in eukaryotic cells can be involved in organization of protein-synthesizing machinery. 相似文献
26.
E A Shestakova L P Motuz A A Minin V I Gelfand L P Gavrilova 《Cell biology international reports》1991,15(1):75-84
Indirect immunofluorescent microscopy was used to study the distribution of eukaryotic elongation factor 2 (EF-2) in cultured mouse embryo fibroblasts. The perinuclear area (endoplasm) of all the cells and many straight cables running along the whole cytoplasm were stained with monospecific goat or rabbit antibodies to rat liver EF-2. Double staining of the cells with antibodies to EF-2 and rhodaminyl-phalloidin (used for actin microfilament detection) showed that EF-2 containing cables coincided with bundles of actin microfilaments. Not all actin microfilament bundles contained EF-2: sometimes EF-2 was not observed in bundles running along the cell edges or in actin microfilament junctions. Triton X-100 extracted most of EF-2 from the cells and no actin microfilament bundles were stained with the EF-2 antibodies in the Triton-extracted cells. Thus, in mouse embryo fibroblasts EF-2 can be found along actin microfilament bundles, but it is unlikely to be their integral protein. 相似文献
27.
Veinberg G Shestakova I Vorona M Kanepe I Lukevics E 《Bioorganic & medicinal chemistry letters》2004,14(1):147-150
6-alkylidenepenicillanate sulfoxides and sulfones were synthesized on the base of 6-oxopenicillanate esters. The targeted splitting of their thiazolidine ring led to the formation of 3-alkylidene substituted 4-heteryldithio and 4-methylsulfonyl azetidin-2-ones. Some of mono and bicyclic beta-lactams revealed potent cytotoxic properties towards monolayer tumor cells in <10-microM concentrations. 相似文献
28.
29.
E P Aniukhovski? L V Rozenshtraukh G G Beloshapko A V Iushmanova N V Shestakova 《Biulleten' eksperimental'no? biologii i meditsiny》1986,102(8):189-192
The effects of ethacizin on delayed activation of the ischemic myocardium by acute left anterior descending coronary artery occlusion were studied in dogs. Ethacizin, administered intravenously at a dose of 0.5 or 1 mg/kg depressed the conduction of excitation in the ischemic myocardium and significantly increased the incidence of ventricular fibrillation. Electrophysiological effects of ethacizin in acute myocardial ischemia, as well as its antiarrhythmic activity at the advanced stages of experimental myocardial infarction might be related to an intensive influence of ethacizin on fast inward sodium current in the myocardial fibers. 相似文献
30.