Biomedical Chemistry: Research and Methods最新文献

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Identification of Androgen Deficiency in Infertility and Reduced Ovarian Reserve Based on HPLCMS/MS and IHLA Measurements 基于HPLCMS/MS和IHLA测定的不孕症雄激素缺乏和卵巢储备减少的鉴定
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00182
S. Kindysheva, A. Gavisova, M. A. Shevtsova, L.T. Tskhovrebova, D. A. Biryukova, N. Starodubtseva, T.Yu. Ivanec, V. Frankevich
{"title":"Identification of Androgen Deficiency in Infertility and Reduced Ovarian Reserve Based on HPLCMS/MS and IHLA Measurements","authors":"S. Kindysheva, A. Gavisova, M. A. Shevtsova, L.T. Tskhovrebova, D. A. Biryukova, N. Starodubtseva, T.Yu. Ivanec, V. Frankevich","doi":"10.18097/bmcrm00182","DOIUrl":"https://doi.org/10.18097/bmcrm00182","url":null,"abstract":"The androgen deficiency and associated states represent is an important problem that affects the quality of women live. The most widely the androgen influence has been studied in the reproductive period in relation to polycystic ovary syndrome; however about laboratory methods to determine the impact of androgen deficiency and its clinical manifestation in the case of young women with a reduced ovarian reserve and with infertility are still actively discussed. Clinical medicine still needs generally approved markers of androgen deficiency states and its lower reference values. In this work we illustrate the perspective of measurements of steroid hormones panel to verify the diagnosis on the basis of high performance liquid chromatography with tandem mass spectrometry and immunochemical methods.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130252873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SPR Biosensor Based High-Throughput Screening of Low Molecular Weight Compounds for Interaction with Candida krusei CYP51 基于SPR生物传感器的高通量筛选与克鲁假丝酵母CYP51相互作用的低分子量化合物
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00183
L. Kaluzhskiy, T. V. Tsybruk, E. Yablokov, O. Gnedenko, E. Zelepuga, A. Kicha, E. Kozlovskaya, N. V. Ivanchina, A. Gilep, A. S. Ivanov
{"title":"SPR Biosensor Based High-Throughput Screening of Low Molecular Weight Compounds for Interaction with Candida krusei CYP51","authors":"L. Kaluzhskiy, T. V. Tsybruk, E. Yablokov, O. Gnedenko, E. Zelepuga, A. Kicha, E. Kozlovskaya, N. V. Ivanchina, A. Gilep, A. S. Ivanov","doi":"10.18097/bmcrm00183","DOIUrl":"https://doi.org/10.18097/bmcrm00183","url":null,"abstract":"The opportunistic fungus Candida krusei is the causative agent of nosocomial infections characterized by high mortality and development of resistance to drugs of the azole class. Therefore, develjoment of non-azole antifungal agents against resistant fungal strains is extremly important. Lanosterol 14-alpha demethylase (CYP51) is a well-known antifungal target. The optical SPR biosensor is a universal tool for screening studies in search of new drug prototypes. This paper presents the methodological aspects of high-hroughput SPR based screening of a library of low molecular weight compounds of natural origin for their interaction with C. krusei CYP51. It has been shown that when performing high-throughput screening, a researcher should pay special attention to the degree of a sensorgram curvature in the association phase. The described approaches to the analysis of high throughput screening data can be useful for researchers working with SPR biosensors from various manufacturers.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123784786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Evaluation of the Collateral Activity Of CRISPR/Cas13a-Ribonuclease on the Agilent 2100 Bioanalyzer CRISPR/ cas13a核糖核酸酶在Agilent 2100生物分析仪上的侧支活性评价
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00169
L. Kurbatov, S. Radko, S. Khmeleva, O. Timoshenko, A. Lisitsa
{"title":"Evaluation of the Collateral Activity Of CRISPR/Cas13a-Ribonuclease on the Agilent 2100 Bioanalyzer","authors":"L. Kurbatov, S. Radko, S. Khmeleva, O. Timoshenko, A. Lisitsa","doi":"10.18097/bmcrm00169","DOIUrl":"https://doi.org/10.18097/bmcrm00169","url":null,"abstract":"The paper describes an original technique for detecting the collateral activity of CRISPR/Cas 13a ribonuclease based on the assessment of ribosomal RNA degradation. The Agilent 2100 bioanalyzer is used as an analyzing device. This approach is an alternative to existing detection methods and has a number of advantages over them in the case when a quantitative assessment of activity is not required. On the example of the test sample, the optimal concentrations and ratios of the components of the reaction mixture, which are necessary to obtain the most indicative result, were determined. The proposed technique can be used for qualitative assessment of the activity of recombinant ribonuclease Cas13a preparations obtained under different conditions of heterologous protein expression and purification, as well as for testing guide RNAs.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125515407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Standardization of Recombinant CRISPR/Cas13a-nuclease Preparations by Using RNase A of Known Activity 利用已知活性RNase A对重组CRISPR/ cas13a核酸酶制剂进行标准化
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00177
L. Kurbatov, S. Radko, S. Khmeleva, O. Timoshenko, A. Lisitsa
{"title":"Standardization of Recombinant CRISPR/Cas13a-nuclease Preparations by Using RNase A of Known Activity","authors":"L. Kurbatov, S. Radko, S. Khmeleva, O. Timoshenko, A. Lisitsa","doi":"10.18097/bmcrm00177","DOIUrl":"https://doi.org/10.18097/bmcrm00177","url":null,"abstract":"The approach to characterize preparations of recombinant Cas13a-nuclease in terms of specific collateral activity has been proposed for standardization of enzyme preparations. The standardization of Cas13a preparations by the specific activity may benefit both the development of assays employing Cas13a collateral ribonuclease activity and the optimization of ribonuclease expression, purification, and storage. The approach is based on measurement of the initial rate of a cleavage of specially designed commercially available RNA molecules (�reporters� labelled with a fluorophore and a quencher) by a preparation of recombinant Cas13a-nuclease and commercial RNase A of known activity. This requires the optimization of a molar ratio for the formation of Cas13a complexes with guide RNA as well as the optimization of amount of the RNA target. The use of a synthetic RNA target appears preferable compared with total RNA preparations.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117212708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Proteoform Identification in 2D Electrophoresis Maps by Using Isoelectric Point Prediction 基于等电点预测的二维电泳图谱中蛋白质形态识别
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00191
A. Rybina
{"title":"Proteoform Identification in 2D Electrophoresis Maps by Using Isoelectric Point Prediction","authors":"A. Rybina","doi":"10.18097/bmcrm00191","DOIUrl":"https://doi.org/10.18097/bmcrm00191","url":null,"abstract":"The possibility of identifying specific protein proteoforms with post-translational modifications (PTM) by analyzing two-dimensional (2D) gel electrophoresis maps and using the prediction of the isoelectric point of proteins (pI) has been investigated. The pI values were predicted using the pIPredict 3 program, supporting a wide range of chemical and post-translational modifications. Eleven 11 proteins (albumin, alpha-1-microglobulin, annexin A2, apolipoprotein E, gastric triacylglycerol lipase, mitochondrial isocitrate dehydrogenase, clusterin, plasmin, prothrombin, endoplasmic reticulum chaperone, S-adenosylmethionine synthase type 1) identified on six 2D electrophoresis maps were used as examples. Various options for selecting hypotheses are considered. These take into consideration the following available information about a particular protein: possible modification sites, processing features, variability of the amino acid composition. The obtained results indicate that the use of predicting the pI value for proteins with hypothetical PTMs can form a set of hypotheses about specific proteoform occurrence on 2D electrophoresis maps.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123175952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Construction and Expression of the Chimeric Human Renalase Gene Encoding the N-Terminal Signal Sequence of the Secretory Protein Prolactin 编码泌乳蛋白n端信号序列的人Renalase嵌合基因的构建与表达
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00175
V. Fedchenko, A. Kaloshin, A. Veselovsky, A. E. Medvedev
{"title":"Construction and Expression of the Chimeric Human Renalase Gene Encoding the N-Terminal Signal Sequence of the Secretory Protein Prolactin","authors":"V. Fedchenko, A. Kaloshin, A. Veselovsky, A. E. Medvedev","doi":"10.18097/bmcrm00175","DOIUrl":"https://doi.org/10.18097/bmcrm00175","url":null,"abstract":"Renalase (RNLS) is a protein that performs various protective functions both inside and outside cells. Intracellular RNLS is a FAD-dependent oxidoreductase (EC 1.6.3.5). Extracellular RNLS lacking an N-terminal peptide does not interact with FAD and exhibits various protective effects on the cell through interaction with receptor proteins. The mechanisms and factors responsible for RNLS transport out of the cell are not fully understood. It is well known that the signal sequence plays a key role in the classical mechanism of protein transport outside cells. One of the approaches to study the secretion of RNLS from the cell can be the creation of chimeric forms of the protein with a modified N-terminal amino acid signal sequence. Bioinformatics analysis showed that the signal sequence of the prolactin gene (PRL), connected to the template sequence of the RNLS gene, gave the classic signal characteristic of secretory proteins. On this basis, this paper describes: (i) a method for constructing the human RNLS gene in which the N-terminal sequence encoded by the RNLS gene was replaced by the N-terminal sequence encoded by the PRL gene; (ii) expression of this chimeric genetic construct.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125589197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Geldanamycin Binding on the Thr90 Phosphorylation Site of Hsp90 格尔达霉素结合对热休克蛋白90 Thr90磷酸化位点的影响
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00145
K. Shcherbakov, D. S. Shcherbinin, A. Veselovsky
{"title":"Effect of Geldanamycin Binding on the Thr90 Phosphorylation Site of Hsp90","authors":"K. Shcherbakov, D. S. Shcherbinin, A. Veselovsky","doi":"10.18097/bmcrm00145","DOIUrl":"https://doi.org/10.18097/bmcrm00145","url":null,"abstract":"Prostate cancer is hormone-dependent and the androgen receptor (AR) is involved in its development. AR is a transcription factor that is activated by ligand binding, result in its translocation into the nucleus, where it initiates gene transcription. In an inactive state in cytoplasm AR exists as a complex with heat shock protein 90 (HSP90) and some other proteins. When the agonist binds, a conformational change in AR occurs, resulting in HSP90 and other chaperones dissociating. Recently it has been shown that for the dissociation of the HSP90-AR complex and the translocation of the latter into the nucleus, phosphorylation of the Thr-90 residue of the N-terminal domain of HSP90 is necessary. In this work, the effect of the HSP90 inhibitor, geldanamycin, interacting with the ATP-binding site, on the Thr90 phosphorylation site was investigated by molecular modeling methods. It has been shown that inhibitor binding slightly affects the size and mobility of cavity around Thr90. It is suggested that inhibitor binding to HSP90 does not result in changing the protein structure and does not influence on protein phosphorylation, and partially explains low effectiveness of such type of drugs in the therapy of prostate cancer.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131875587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Superoxide Generation by Nicotinamide Coenzymes 烟酰胺辅酶产生超氧化物
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00188
T. V. Sirota
{"title":"Superoxide Generation by Nicotinamide Coenzymes","authors":"T. V. Sirota","doi":"10.18097/bmcrm00188","DOIUrl":"https://doi.org/10.18097/bmcrm00188","url":null,"abstract":"Nicotinamide coenzymes can generate superoxide radicalsin alkaline environment. Their formation was registered by reduction of nitroblue tetrazolium (NBT) present in the buffer with formation of diformasan. Inhibition of diformazan formation occurs when superoxide dimutase (SOD) is added to the system, thus confirming generation of O─●. The highest superoxide generating activity was observed with NADPH. In the case of NADPH and NADH, the rate of superoxide generation was significantly lower (by approximately 50%). No O─● was detected when NAD was used under the same conditions and in the same time; however, 4 h later, diformasan was detected in the same sample. The superoxide generating activity decreased in the following order: NADPH > NADH ? NADP > NAD. Other compounds tested (adenosine, ADP and ATP) did not generate superoxide radicals even after prolonged incubation. In a cell, where a local changes in the pH of the environment are possible, nicotinamide coenzymes can be potential sources of O─● and thus participate in cell signaling. A change in pH can initiate this process.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129283101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Methods for the Preparation of Blood Serum Samples in the Assessment of the Pharmacokinetics of Protein Drugs by the Example of Viscumin 蛋白类药物药动学评价血清样品制备方法(以粘胶素为例)
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00152
N. Yudina, Ya.N. Barashkova, O. Vladimirova, V. Myasnikov
{"title":"Methods for the Preparation of Blood Serum Samples in the Assessment of the Pharmacokinetics of Protein Drugs by the Example of Viscumin","authors":"N. Yudina, Ya.N. Barashkova, O. Vladimirova, V. Myasnikov","doi":"10.18097/bmcrm00152","DOIUrl":"https://doi.org/10.18097/bmcrm00152","url":null,"abstract":"A comparative evaluation of methods for preparing blood serum samples for determination of the lectin content of the mistletoe Viscum Album, viscumin, by high-performance liquid chromatography in combination with high-resolution mass-spectrometry detection has been carried out. Based on the results of the analysis of the lectin hydrolyzate, a specific peptide fragment with m/z 791.388 suitable for subsequent quantitative determination was selected. Isolation of viscumin from serum components was carried out without the use of specific antibodies. The study used methods employing various spin columns and the method of protein precipitation with 1% TCA (trichloroacetic acid) in IPA (isopropyl alcohol). Testing the methods of depletion of blood serum proteins was based on the determination of the degree of extraction of lectin from model serum samples. As a result of our research, we have developed a technique for the quantitative analysis of viscumin in blood serum by the most efficient method of sample preparation using the ProteoMiner spin columns. The technique allows to determine the protein concentration up to 5·10-4 mg/ml with the extraction degree (2.7 ± 0.6) %.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128622892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Algorithms for Calculation of Parameters of Electrochemical Biosensor 电化学生物传感器参数的计算算法
Biomedical Chemistry: Research and Methods Pub Date : 1900-01-01 DOI: 10.18097/bmcrm00178
V. Shumyantseva, V. Pronina
{"title":"Algorithms for Calculation of Parameters of Electrochemical Biosensor","authors":"V. Shumyantseva, V. Pronina","doi":"10.18097/bmcrm00178","DOIUrl":"https://doi.org/10.18097/bmcrm00178","url":null,"abstract":"The aim of this work is to present the experimental results in the form of an algorithm for analyzing the modification of screen printed electrodes, including the possibility of its regeneration for irreversibly oxidizing biologically active compounds (drugs, DNA and proteins). A protocol was developed for quantitative analysis and study of the mechanism of drug-DNA interaction by differential pulse voltammetry, including the following parameters: complex binding constant, Gibbs free energy, and electrochemical coefficients of the toxic effect.","PeriodicalId":286037,"journal":{"name":"Biomedical Chemistry: Research and Methods","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124983336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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