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1.
V. N. Barai A. I. Zinchenko L. M. Zalashko L. A. Eroshevskaya I. A. Mikhailopulo 《Biotechnology letters》1995,17(6):599-602
Summary The title compound was prepared by a three-stage enzymatic procedure consisting of (i) RNA hydrolysis to a mixture of ribonucleosides using intact mycelium of Spicaria violacea, (ii) transribosylation of exogenous adenine employing whole cells of Escherichia coli as a biocatalyst, and (iii) conversion of formed adenosine into ATP by the enzymes of alcohol fermentation and the kinases extracted from baker's yeast. 相似文献
2.
A. I. Zinchenko V. N. Barai S. B. Bokut N. V. Dudchik E. I. Kvasyuk I. A. Mikhailopulo 《Biotechnology letters》1991,13(2):87-90
Summary The title compound was prepared by a two step enzymatic procedure consisting of DNA hydrolysis to the mixture of 2-deoxynucleosides followed by a transdeoxyribosilation of exogenous adenine. 相似文献
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Yaoyu Ren Timo Danner Alexandra Moy Martin Finsterbusch Tanner Hamann Jan Dippell Till Fuchs Marius Müller Ricky Hoft André Weber Larry A. Curtiss Peter Zapol Matthew Klenk Anh T. Ngo Pallab Barai Brandon C. Wood Rongpei Shi Liwen F. Wan Tae Wook Heo Martin Engels Jagjit Nanda Felix H. Richter Arnulf Latz Venkat Srinivasan Jürgen Janek Jeff Sakamoto Eric D. Wachsman Dina Fattakhova-Rohlfing 《Liver Transplantation》2023,13(1):2201939
The garnet-type phase Li7La3Zr2O12 (LLZO) attracts significant attention as an oxide solid electrolyte to enable safe and robust solid-state batteries (SSBs) with potentially high energy density. However, while significant progress has been made in demonstrating compatibility with Li metal, integrating LLZO into composite cathodes remains a challenge. The current perspective focuses on the critical issues that need to be addressed to achieve the ultimate goal of an all-solid-state LLZO-based battery that delivers safety, durability, and pack-level performance characteristics that are unobtainable with state-of-the-art Li-ion batteries. This perspective complements existing reviews of solid/solid interfaces with more emphasis on understanding numerous homo- and heteroionic interfaces in a pure oxide-based SSB and the various phenomena that accompany the evolution of the chemical, electrochemical, structural, morphological, and mechanical properties of those interfaces during processing and operation. Finally, the insights gained from a comprehensive literature survey of LLZO–cathode interfaces are used to guide efforts for the development of LLZO-based SSBs. 相似文献
4.
Amlan Das Abhijit Bhattacharya Subhendu Chakrabarty Arnab Ganguli Gopal Chakrabarti 《PloS one》2013,8(7)
Smokeless tobacco usage is a growing public health problem worldwide. The molecular mechanism(s) underlying smokeless tobacco associated tissue damage remain largely unidentified. In the present study we have tried to explore the effects of aqueous extract of smokeless tobacco (STE) on tubulin-microtubule, the major cytoskeleton protein that maintains cells morphology and participates in cell division. Exposure to STE resulted in dose-dependent cytotoxicity in a variety of mammalian transformed cell lines such as human lung epithelial cells A549, human liver epithelial cells HepG2, and mouse squamous epithelial cells HCC7, as well as non-tumorogenic human peripheral blood mononuclear cells PBMC. Cellular morphology of STE-treated cells was altered and the associated disruption of microtubule network indicates that STE targets tubulin-microtubule system in both cell lines. Furthermore it was also observed that STE-treatment resulted in the selective degradation of cellular tubulin, whereas actin remains unaltered. In vitro, polymerization of purified tubulin was inhibited by STE with the IC50 value∼150 µg/ml and this is associated with the loss of reactive cysteine residues of tubulin. Application of thiol-based antioxidant N-acetyl cysteine (NAC) significantly abrogates STE-mediated microtubule damage and associated cytotoxicity in both A549 and HepG2 cells. These results suggest that microtubule damage is one of the key mechanisms of STE-induced cytotoxity in mammalian cells. 相似文献
5.
Barai VN Zinchenko AI Eroshevskaya LA Zhernosek EV Balzarini J De Clercq E Mikhailopulo IA 《Nucleosides, nucleotides & nucleic acids》2003,22(5-8):751-753
9-(3-Deoxy-beta-D-erythro-pentofuranosyl)-2,6-diaminopurine (2) was synthesized by an enzymatic transglycosylation of 2,6-diaminopurine using 3'-deoxycytidine (1) as a donor of the sugar moiety. Nucleoside 2 was transformed to 3'-deoxy guanosine (3), 9-(3-deoxy-beta-D-erythro-pentofuranosyl)-2-amino-6-oxopurine (3'-deoxyisoguanosine; 4), and 9-(3-deoxy-beta-D-erythro-pentofuranosyl)-2-fluoroadenine (5). Compounds 2-5 were evaluated for their anti-HIV activity. 相似文献
6.
Dalal Subhamita Adhikary Jayashree Roy Anup Biswas Shampa Sarkar Mukhopadhyay Prabir Kumar Acharya Sagar Ghosh Amlan 《Molecular biology reports》2022,49(9):8369-8380
Molecular Biology Reports - On the background of the epidemiological link between diabetes and oral cancer, the present study aimed to analyze the potential involvement of selected glucose... 相似文献
7.
Sahoo R Dutta T Das A Sinha Ray S Sengupta R Ghosh S 《Free radical biology & medicine》2006,40(4):625-631
Oxidative stress has been shown to alter cellular redox status in various cell types. Changes in expressions of several antioxidative and antistress-responsive genes along with activation or inactivation of various proteins were also reported during oxidative insult as well as during nitrosative stress. In the present study, we show the effect of nitrosative stress on cellular redox status of fission yeast Schizosaccharomyces pombe. This is the first report of S-nitrosoglutathione (GSNO) reductase activity in S. pombe and its inactivation by GSNO. We also show the inactivation of glutathione reductase (GR) and glutathione peroxidase in the presence of various reactive nitrogen species in vivo. In addition, we first observe the inactivation of GR by peroxynitrite in vivo using S. pombe cells and also similar observations under in vitro conditions. An immunoreactive band against monoclonal anti-3-nitrotyrosine antibody confirms the modification of GR under in vitro conditions. We also show the effect of nitrosative stress on Deltapap1 cells of S. pombe, which are more sensitive to nitrosative stress, indicating the involvement of Pap1 in the protection against nitrosative stress. Finally, exposure of S. pombe cells to reactive nitrogen species reveals an important role of cellular thiol pool in protection against nitrosative stress. 相似文献
8.
Biswas A Meissner TB Kawai T Kobayashi KS 《Journal of immunology (Baltimore, Md. : 1950)》2012,189(2):516-520
MHC class I and class II are crucial for the adaptive immune system. Although regulation of MHC class II expression by CIITA has long been recognized, the mechanism of MHC class I transactivation has been largely unknown until the recent discovery of NLRC5/class I transactivator. In this study, we show using Nlrc5-deficient mice that NLRC5 is required for both constitutive and inducible MHC class I expression. Loss of Nlrc5 resulted in severe reduction in the expression of MHC class I and related genes such as β(2)-microglobulin, Tap1, or Lmp2, but did not affect MHC class II levels. IFN-γ stimulation could not overcome the impaired MHC class I expression in Nlrc5-deficient cells. Upon infection with Listeria monocyogenes, Nlrc5-deficient mice displayed impaired CD8(+) T cell activation, accompanied with increased bacterial loads. These findings illustrate critical roles of NLRC5/class I transactivator in MHC class I gene regulation and host defense by CD8(+) T cell responses. 相似文献
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Sarkar AK Ghosh D Das A Selvan PS Gowda KV Mandal U Bose A Agarwal S Bhaumik U Pal TK 《Journal of chromatography. B, Analytical technologies in the biomedical and life sciences》2008,873(1):77-85
A simple, sensitive and specific liquid chromatography-tandem mass spectrometry method was developed and validated for quantification of metoprolol succinate (MPS) and amlodipine besylate (AM) using hydrochlorothiazide (HCTZ) as IS in human plasma. Both the drugs were extracted by simple liquid-liquid extraction with chloroform. The chromatographic separation was performed on a reversed-phase peerless basic C18 column with a mobile phase of methanol-water containing 0.5% formic acid (8:2, v/v). The protonated analyte was quantitated in positive ionization by multiple reaction monitoring with a mass spectrometer. The method was validated over the concentration range of 1-100ng/ml for MPS and 1-15ng/ml AM in human plasma. The MRM transition of m/z 268.10-103.10, m/z 409.10-334.20 and m/z 296.00-205.10 were used to measure MPS, AM and HCTZ (IS), respectively. This method was successfully applied to the pharmacokinetic study of fixed dose combination (FDC) of MPS and AM formulation product after an oral administration to Indian healthy human volunteers. 相似文献