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121.
Kristina R. Denisova Nikita A. Orlov Sergey A. Yakimov Elena A. Kryukova Dmitry A. Dolgikh Mikhail P. Kirpichnikov Alexey V. Feofanov Oksana V. Nekrasova 《International journal of molecular sciences》2022,23(3)
Peptide pore blockers and their fluorescent derivatives are useful molecular probes to study the structure and functions of the voltage-gated potassium Kv1.3 channel, which is considered as a pharmacological target in the treatment of autoimmune and neurological disorders. We present Kv1.3 fluorescent ligand, GFP–MgTx, constructed on the basis of green fluorescent protein (GFP) and margatoxin (MgTx), the peptide, which is widely used in physiological studies of Kv1.3. Expression of the fluorescent ligand in E. coli cells resulted in correctly folded and functionally active GFP–MgTx with a yield of 30 mg per 1 L of culture. Complex of GFP–MgTx with the Kv1.3 binding site is reported to have the dissociation constant of 11 ± 2 nM. GFP–MgTx as a component of an analytical system based on the hybrid KcsA–Kv1.3 channel is shown to be applicable to recognize Kv1.3 pore blockers of peptide origin and to evaluate their affinities to Kv1.3. GFP–MgTx can be used in screening and pre-selection of Kv1.3 channel blockers as potential drug candidates. 相似文献
122.
Alasdair G. Kay Kane Treadwell Paul Roach Rebecca Morgan Rhys Lodge Mairead Hyland Anna M. Piccinini Nicholas R. Forsyth Oksana Kehoe 《International journal of molecular sciences》2022,23(1)
Mesenchymal stem cells (MSCs) immunomodulate inflammatory responses through paracrine signalling, including via secretion of extracellular vesicles (EVs) in the cell secretome. We evaluated the therapeutic potential of MSCs-derived small EVs in an antigen-induced model of arthritis (AIA). EVs isolated from MSCs cultured normoxically (21% O2, 5% CO2), hypoxically (2% O2, 5% CO2) or with a pro-inflammatory cytokine cocktail were applied into the AIA model. Disease pathology was assessed post-arthritis induction through swelling and histopathological analysis of synovial joint structure. Activated CD4+ T cells from healthy mice were cultured with EVs or MSCs to assess deactivation capabilities prior to application of standard EVs in vivo to assess T cell polarisation within the immune response to AIA. All EVs treatments reduced knee-joint swelling whilst only normoxic and pro-inflammatory primed EVs improved histopathological outcomes. In vitro culture with EVs did not achieve T cell deactivation. Polarisation towards CD4+ helper cells expressing IL17a (Th17) was reduced when normoxic and hypoxic EV treatments were applied in vitro. Normoxic EVs applied into the AIA model reduced Th17 polarisation and improved Regulatory T cell (Treg):Th17 homeostatic balance. Normoxic EVs present the optimal strategy for broad therapeutic benefit. EVs present an effective novel technology with the potential for cell-free therapeutic translation. 相似文献
123.
Ekaterina Kotelnikova Klaus M. Frahm Dima L. Shepelyansky Oksana Kunduzova 《International journal of molecular sciences》2022,23(1)
Protein–protein interactions is a longstanding challenge in cardiac remodeling processes and heart failure. Here, we use the MetaCore network and the Google matrix algorithms for prediction of protein–protein interactions dictating cardiac fibrosis, a primary cause of end-stage heart failure. The developed algorithms allow identification of interactions between key proteins and predict new actors orchestrating fibroblast activation linked to fibrosis in mouse and human tissues. These data hold great promise for uncovering new therapeutic targets to limit myocardial fibrosis. 相似文献
124.
Synthesis of the adduct of aniline and glycidyl methacrylate and its polymerization and copolymerization with two diisocyanates are presented. Hexyl diisocyanate representing aliphatic compounds and toluene diisocyanate as the aromatic compound were used. UV and thermal initiations were applied. The curing process was controlled by FTIR analysis. Thermomechanical properties of the compositions cured at different temperatures were compared. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 524–528, 2005 相似文献
125.
126.
Planning is investigated in an area where classical STRIPS-like approaches usually fail. The application domain is therapy
(i.e. repair) for complex dynamic processes. The peculiarities of this domain are discussed in some detail for convincingly
developing the characteristics of the inductive planning approach presented. Plans are intended to be run for process therapy.
Thus, plans are programs. Because of the unavoidable vagueness and uncertainty of information about complex dynamic processes
in the case of disturbance, therapy plan generation turns out to be inductive program synthesis. There is developed a graph-theoretically
based approach to inductive therapy plan generation. This approach is investigated from the inductive inference perspective.
Particular emphasis is put on consistent and incremental learning of therapy plans. Basic application scenarios are developed
and compared to each other. The inductive inference approach is invoked to develop and investigate a couple of planning algorithms.
The core versions of these algorithms are successfully implemented in Lisp and Prolog.
The work has been partially supported by the German Federal Ministry for Research and Technology (BMFT) within the Joint Project
(BMFT-Verbundprojekt)Wiscon onDevelopment of Methods for Intelligent Monitoring and Control under contract no. 413-4001-01 IW 204 B. Additionally, the second author’s work in learning theory received some support
from the German Federal Ministry for Research and Technology (BMFT) within the Joint Project (BMFT-Verbundprojekt)Gosler onAlgorithmic Learning for Knowledge-Based Systems under contract no. 413-4001-01 IW 101 A.
Oksana Arnold: She graduated from Leipzig University of Technology in 1990 with a Master’s Thesis on a rule interpreter for default reasoning.
She received her PhD. in Computer Science in 1996 on therapy control for complex dynamic processes within a knowledge-based
process supervision and control system. Recently, She works at the University of Leipzig within a research project on information
and communication technologies for virtual enterprises. Her main scientific interest is both in knowledge-based process supervision
and control, where she did a pioneering work on therapy plan generation, and in flexible information systems for new generation
business applications.
Klaus P. Jantke: He graduated from Humboldt University Berlin with a Master’s Thesis in 1975. He received his Ph. D. in Computer Science
in 1979 and his Habilitation at Humboldt in 1984. He worked as the Head of a Research Laboratory in Theoretical Computer Science
and as a Vice-Director of the Computing Center at Humboldt University. Since 1987, Dr. Jantke is full professor at Leipzig
University of Technology. His main research interest is in algorithmic learning theory. Besides this, he contributes to case-based
reasoning, where his special interest is in learning issues and in structural similarity, and to knowledge-based process supervision
and control, especially to planning. Dr. Jantke is member of the ACM, the EATCS, and the GI. 相似文献
127.
Bacherikov Yuriy Yu. Lytvyn Petro M. Mamykin Sergii V. Okhrimenko Olga B. Ponomarenko Valentyna V. Malyuta Serhiy V. Doroshkevich Aleksandr S. Danilenko Igor A. Gorban Oksana A. Gilchuk Andrii Baiova Yana Lyubchyk Andriy 《Journal of Materials Science: Materials in Electronics》2022,33(5):2753-2764
Journal of Materials Science: Materials in Electronics - The current transfer through a two-layer structure saturated with absorbed water, each layer of which consists of pressed ZrO2 nanoparticles... 相似文献
128.
129.
The allelopathic interaction between sorghum [Sorghum bicolor (L.) Moench] and 10 species of grass and broadleaf weeds was investigated. Germination of weed seeds was slightly inhibited or stimulated, depending on species, when incubated in closed Petri dishes with germinating sorghum. Subsequent radicle and hypocotyl or coleoptile elongation of weeds was significantly inhibited by the germinating sorghum. For weeds interplanted with sorghum and grown under greenhouse conditions. The inhibitory effect on some weed species was still evident after 2 months of growth. Significant differences were found in the dry matter per weed plant grown in pots in proximity to sorghum vs. weeds grown in monoculture. Aqueous leachates from pots planted with sorghum alone or from a system in which sorghum roots protruded into water had strong allelopathic activity. These results indicate that water-soluble allelochemicals are produced by germinating sorghum seeds and that production of these substances continues during seedling growth.Agricultural Research Service, U.S. Department of Agriculture. 相似文献
130.
Carl‐Magnus Svensson Oksana Shvydkiv Stefanie Dietrich Lisa Mahler Thomas Weber Mahipal Choudhary Miguel Tovar Marc Thilo Figge Martin Roth 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(4)
To efficiently exploit the potential of several millions of droplets that can be considered as individual bioreactors in microfluidic experiments, methods to encode different experimental conditions in droplets are needed. The approach presented here is based on coencapsulation of colored polystyrene beads with biological samples. The decoding of the droplets, as well as content quantification, are performed by automated analysis of triggered images of individual droplets in‐flow using bright‐field microscopy. The decoding strategy combines bead classification using a random forest classifier and Bayesian inference to identify different codes and thus experimental conditions. Antibiotic susceptibility testing of nine different antibiotics and the determination of the minimal inhibitory concentration of a specific antibiotic against a laboratory strain of Escherichia coli are presented as a proof‐of‐principle. It is demonstrated that this method allows successful encoding and decoding of 20 different experimental conditions within a large droplet population of more than 105 droplets per condition. The decoding strategy correctly assigns 99.6% of droplets to the correct condition and a method for the determination of minimal inhibitory concentration using droplet microfluidics is established. The current encoding and decoding pipeline can readily be extended to more codes by adding more bead colors or color combinations. 相似文献