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V L Andronova L A Aleksandrova I L Karpenko Iu S Skoblov 《Antibiotiki i khimioterapii͡a》2003,48(5):3-6
It was demonstrated that several 5'-phosphonates of 4'-thio-5-ethyl-2'-deoxyuridine possessed antiviral activity in vitro and in the murine model of herpes simplex virus type 1 infection. It was shown that the derivatives after intraabdominal administration penetrated effectively into the brain tissue. The agents provided statistically significant increase of the average life span, lower virus titre in the brain and lower lethality when compared to the control group of the animals. It is emphasized that the derivatives were less toxic than the original compound. 相似文献
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Ajith?R?Vancha Suman?Govindaraju Kishore?VL?Parsa Madhuri?Jasti Maribel?González-García Rafael?P?BallesteroEmail author 《BMC biotechnology》2004,4(1):23
Background
Several cell lines and primary cultures benefit from the use of positively charged extracellular matrix proteins or polymers that enhance their ability to attach to culture plates. Polyethyleneimine is a positively charged polymer that has gained recent attention as a transfection reagent. A less known use of this cationic polymer as an attachment factor was explored with several cell lines. 相似文献5.
Aleksandrova L. A. Andronova V. L. Karpenko I. L. Skoblov Yu. S. Adani A. Galegov G. A. 《Russian Journal of Bioorganic Chemistry》2002,28(5):412-418
A number of new 5"-phosphonate derivatives of 4"-thio-5-ethyl-2"-deoxyuridine (TEDU) were synthesized. These compounds displayed a low cytotoxicity and, except for TEDU 5"-fluorophosphate, antiherpes activity similar to that of 9-[(2-hydroxyethoxy)methyl]guanine (acyclovir) and 9-(1,3-dihydroxy-2-propoxymethyl)guanine (pencyclovir). 5"-Ethoxycarbonylphosphonate and 5"-aminocarbonylphosphonate of TEDU were also found to suppress the reproduction of herpes simplex type 1 virus, which is resistant to acyclovir. 相似文献
6.
Karpenko IL Jasko MV Andronova VL Ivanov AV Kukhanova MK Galegov GA Skoblov YS 《Nucleosides, nucleotides & nucleic acids》2003,22(3):319-328
Phosphonate derivatives of acyclovir containing phosphorous acid and ethoxycarbonylphosphonic acid residues as well as their isopropyl esters were prepared. They selectively inhibited the herpes simplex virus 1 reproduction in Vero cell culture, the efficacy of esters being 3-4 times higher than that of ACV. The hydrolysis of the synthesized compounds was studied in the PBS buffer and human blood serum. 相似文献
7.
CA Kalva-Filho EZ Campos VL Andrade ASR Silva AM Zagatto MCS Lima M Papoti 《Biology of sport / Institute of Sport》2015,32(4):333-337
The aims of the present study were to investigate the relationship of aerobic and anaerobic parameters with 400 m performance, and establish which variable better explains long distance performance in swimming. Twenty-two swimmers (19.1±1.5 years, height 173.9±10.0 cm, body mass 71.2±10.2 kg; 76.6±5.3% of 400 m world record) underwent a lactate minimum test to determine lactate minimum speed (LMS) (i.e., aerobic capacity index). Moreover, the swimmers performed a 400 m maximal effort to determine mean speed (S400m), peak oxygen uptake () and total anaerobic contribution (CANA). The CANA was assumed as the sum of alactic and lactic contributions. Physiological parameters of 400 m were determined using the backward extrapolation technique ( and alactic contributions of CANA) and blood lactate concentration analysis (lactic anaerobic contributions of CANA). The Pearson correlation test and backward multiple regression analysis were used to verify the possible correlations between the physiological indices (predictor factors) and S400m (independent variable) (p < 0.05). Values are presented as mean ± standard deviation. Significant correlations were observed between S400m (1.4±0.1 m·s-1) and LMS (1.3±0.1 m·s-1; r = 0.80), (4.5±3.9 L·min-1; r = 0.72) and CANA (4.7±1.5 L·O2; r= 0.44). The best model constructed using multiple regression analysis demonstrated that LMS and explained 85% of the 400 m performance variance. When backward multiple regression analysis was performed, CANA lost significance. Thus, the results demonstrated that both aerobic parameters (capacity and power) can be used to predict 400 m swimming performance. 相似文献
8.
Konrad Zych Yang Li Joeri K van der Velde Ronny VL Joosen Wilco Ligterink Ritsert C Jansen Danny Arends 《BMC bioinformatics》2015,16(1)
Background
Genetic markers and maps are instrumental in quantitative trait locus (QTL) mapping in segregating populations. The resolution of QTL localization depends on the number of informative recombinations in the population and how well they are tagged by markers. Larger populations and denser marker maps are better for detecting and locating QTLs. Marker maps that are initially too sparse can be saturated or derived de novo from high-throughput omics data, (e.g. gene expression, protein or metabolite abundance). If these molecular phenotypes are affected by genetic variation due to a major QTL they will show a clear multimodal distribution. Using this information, phenotypes can be converted into genetic markers.Results
The Pheno2Geno tool uses mixture modeling to select phenotypes and transform them into genetic markers suitable for construction and/or saturation of a genetic map. Pheno2Geno excludes candidate genetic markers that show evidence for multiple possibly epistatically interacting QTL and/or interaction with the environment, in order to provide a set of robust markers for follow-up QTL mapping.We demonstrate the use of Pheno2Geno on gene expression data of 370,000 probes in 148 A. thaliana recombinant inbred lines. Pheno2Geno is able to saturate the existing genetic map, decreasing the average distance between markers from 7.1 cM to 0.89 cM, close to the theoretical limit of 0.68 cM (with 148 individuals we expect a recombination every 100/148=0.68 cM); this pinpointed almost all of the informative recombinations in the population.Conclusion
The Pheno2Geno package makes use of genome-wide molecular profiling and provides a tool for high-throughput de novo map construction and saturation of existing genetic maps. Processing of the showcase dataset takes less than 30 minutes on an average desktop PC. Pheno2Geno improves QTL mapping results at no additional laboratory cost and with minimum computational effort. Its results are formatted for direct use in R/qtl, the leading R package for QTL studies. Pheno2Geno is freely available on CRAN under “GNU GPL v3”. The Pheno2Geno package as well as the tutorial can also be found at: http://pheno2geno.nl.Electronic supplementary material
The online version of this article (doi:10.1186/s12859-015-0475-6) contains supplementary material, which is available to authorized users. 相似文献9.
V. N. Stepanenko R. S. Esipov A. I. Miroshnikov V. L. Andronova G. A. Galegov M. V. Yasko A. A. Gus’kova A. Yu. Skoblov Yu. S. Skoblov 《Russian Journal of Bioorganic Chemistry》2011,37(4):436-440
Thymidine kinase UL23 gene (EC 2.7.1.145) from the L2 acyclovir-sensitive strain of herpes simplex virus type 1 was cloned and expressed in E. coli. The enzyme was purified by chromatography to the purity of 90% according to PAG electrophoresis data. The Michaelis constants
for the reactions with thymidine and acyclovir were determined. The enzyme was found to phosphorylate modified nucleosides,
particularly 3′-deoxythymidine, 3′-deoxy-2′,3′-didehydrothymidine, 2′,3′-dideoxycytidine, 9-[(hydroxyethyl)methyl]guanine,
E-5-(2-bromovinyl-2′-deoxyuridine, 9-(1,3-dihydroxy-2-propoxymethyl)guanine, 2′,3′-dideoxydehydrothymidine, β-L-2′,3′-dideoxy-3′-thiacytidine, and 3′-fluoro-3′-deoxythymidine. Some properties of the purified enzyme were compared with
those of thymidine kinases of other herpes simplex virus strains. It was shown that acyclovir H-phosphonate inhibited the
enzyme. 相似文献
10.
Natalia F. Zakirova Alexander V. Shipitsyn Maxim V. Jasko Maria M. Prokofjeva Valeria L. Andronova Georgiy A. Galegov Vladimir S. Prassolov Sergey N. Kochetkov 《Bioorganic & medicinal chemistry》2012,20(19):5802-5809
The antiviral activity against HIV and HSV and the chemical stability of ACV phosphoramidate derivatives were studied. The phosphoramidates of ACV demonstrated moderate activity. The best compound appeared to be 9-(2-hydroxymethyl)guanine phosphoromonomorpholidate (7), which inhibited virus replication in pseudo-HIV-1 particles by 50% at 50 μM. It also inhibited replication of wild-type HSV-1 (9.7 μM) as well as an acyclovir-resistant strain (25 μM). None of the synthesised compounds showed any cytotoxicity. 相似文献