Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry最新文献_第7页

Structure and Conformational Properties of d-Glucose/d-Galactose-Binding Protein in Crowded Milieu 拥挤环境中d-葡萄糖/d-半乳糖结合蛋白的结构和构象性质

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020244

A. Fonin, S. Silonov, Asiya K. Sitdikova, I. Kuznetsova, V. Uversky, K. Turoverov

{"title":"Structure and Conformational Properties of d-Glucose/d-Galactose-Binding Protein in Crowded Milieu","authors":"A. Fonin, S. Silonov, Asiya K. Sitdikova, I. Kuznetsova, V. Uversky, K. Turoverov","doi":"10.3390/molecules22020244","DOIUrl":"https://doi.org/10.3390/molecules22020244","url":null,"abstract":"Conformational changes of d-glucose/d-galactose-binding protein (GGBP) were studied under molecular crowding conditions modeled by concentrated solutions of polyethylene glycols (PEG-12000, PEG-4000, and PEG-600), Ficoll-70, and Dextran-70, addition of which induced noticeable structural changes in the GGBP molecule. All PEGs promoted compaction of GGBP and lead to the increase in ordering of its structure. Concentrated solutions of PEG-12000 and PEG-4000 caused GGBP aggregation. Although Ficoll-70 and Dextran-70 also promoted increase in the GGBP ordering, the structural outputs were different for different crowders. For example, in comparison with the GGBP in buffer, the intrinsic fluorescence spectrum of this protein was shifted to short-wave region in the presence of PEGs but was red-shifted in the presence of Ficoll-70 and Dextran-70. It was hypothesized that this difference could be due to the specific interaction of GGBP with the sugar-based polymers (Ficoll-70 and Dextran-70), indicating that protein can adopt different conformations in solutions containing molecular crowders of different chemical nature. It was also shown that all tested crowding agents were able to stabilize GGBP structure shifting the GGBP guanidine hydrochloride (GdnHCl)-induced unfolding curves to higher denaturant concentrations, but their stabilization capabilities did not depend on the hydrodynamic dimensions of the polymers molecules. Refolding of GGBP was complicated by protein aggregation in all tested solutions of crowding agents. The lowest yield of refolded protein was achieved in the highly concentrated solutions of PEG-12000. These data support the previous notion that the influence of macromolecular crowders on proteins is rather complex phenomenon that extends beyond the excluded volume effects.","PeriodicalId":19033,"journal":{"name":"Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89887959","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: 10

A Comparative Analysis of the Chemical Composition, Anti-Inflammatory, and Antinociceptive Effects of the Essential Oils from Three Species of Mentha Cultivated in Romania 罗马尼亚种植的三种薄荷精油的化学成分、抗炎和抗伤作用的比较分析

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020263

C. Mogoșan, O. Voștinaru, R. Oprean, C. Heghes, L. Filip, G. Balica, R. Moldovan

{"title":"A Comparative Analysis of the Chemical Composition, Anti-Inflammatory, and Antinociceptive Effects of the Essential Oils from Three Species of Mentha Cultivated in Romania","authors":"C. Mogoșan, O. Voștinaru, R. Oprean, C. Heghes, L. Filip, G. Balica, R. Moldovan","doi":"10.3390/molecules22020263","DOIUrl":"https://doi.org/10.3390/molecules22020263","url":null,"abstract":"This work was aimed at correlating the chemotype of three Mentha species cultivated in Romania with an in vivo study of the anti-inflammatory and antinociceptive effects of essential oils. The selected species were Mentha piperita L. var. pallescens (white peppermint), Mentha spicata L. subsp. crispata (spearmint), and Mentha suaveolens Ehrh. (pineapple mint). Qualitative and quantitative analysis of the essential oils isolated from the selected Mentha species was performed by gas chromatography coupled with mass spectrometry (GC-MS). The anti-inflammatory activity of the essential oils was determined by the rat paw edema test induced by λ-carrageenan. The antinociceptive effect of the essential oils was evaluated by the writhing test in mice, using 1% (v/v) acetic acid solution administered intraperitonealy and by the hot plate test in mice. The results showed a menthol chemotype for M. piperita pallescens, a carvone chemotype for M. spicata, and a piperitenone oxide chemotype for M. suaveolens. The essential oil from M. spicata L. (EOMSP) produced statistically significant and dose-dependent anti-inflammatory and antinociceptive effects.","PeriodicalId":19033,"journal":{"name":"Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry","volume":"177 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79927970","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: 60

Phenolic Acid Profiling, Antioxidant, and Anti-Inflammatory Activities, and miRNA Regulation in the Polyphenols of 16 Blueberry Samples from China 中国16种蓝莓样品中多酚类物质的酚酸谱、抗氧化和抗炎活性以及miRNA调控

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020312

Xianming Su, Jian Zhang, Hong-qing Wang, Jing Xu, Jiuming He, Liying Liu, Ting Zhang, Ruo-yun Chen, Jie Kang

{"title":"Phenolic Acid Profiling, Antioxidant, and Anti-Inflammatory Activities, and miRNA Regulation in the Polyphenols of 16 Blueberry Samples from China","authors":"Xianming Su, Jian Zhang, Hong-qing Wang, Jing Xu, Jiuming He, Liying Liu, Ting Zhang, Ruo-yun Chen, Jie Kang","doi":"10.3390/molecules22020312","DOIUrl":"https://doi.org/10.3390/molecules22020312","url":null,"abstract":"To investigate the anti-atherosclerosis related mechanism of blueberries, the phenolic acids (PAs) content, antioxidant and anti-inflammatory activities, as well as the microRNA (miRNA) regulation of polyphenol fractions in blueberry samples from China were studied. Sixteen batches of blueberries including 14 commercialized cultivars (Reka, Patriot, Brigitta, Bluecrop, Berkeley, Duke, Darrow, Northland, Northblue, Northcountry, Bluesource, Southgood, O’Neal, and Misty) were used in this study. Seven PAs in the polyphenol fractions from 16 blueberry samples in China were quantified by high performance liquid chromatography/tandem mass spectrometry (HPLC/MS2). The antioxidant activities of blueberry polyphenols were tested by (1,1-diphenyl-2-picrylhydrazyl [DPPH]) assay. The anti-inflammatory (tumor necrosis factor-α [TNF-α] and interleukin-6 [IL-6]) activities of the polyphenol fractions of the blueberries were investigated by using lipopolysaccharide (LPS) induced RAW 264.7 macrophages. The correlation analysis showed that the antioxidant (1,1-diphenyl-2-picrylhydrazyl [DPPH]) and anti-inflammatory (tumor necrosis factor-α [TNF-α] and interleukin-6 [IL-6]) activities of the polyphenol fractions of the blueberries were in accordance with their PA contents. Although the polyphenol-enriched fractions of blueberries could inhibit the microRNAs (miRNAs) (miR-21, miR-146a, and miR-125b) to different extents, no significant contribution from the PAs was observed. The inhibition of these miRNAs could mostly be attributed to the other compounds present in the polyphenol-enriched fraction of the blueberries. This is the first study to evaluate the PAs content, antioxidant and anti-inflammatory activities, and miRNA regulation of Chinese blueberries.","PeriodicalId":19033,"journal":{"name":"Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81769510","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: 39

An Easy Approach to Control β-Phase Formation in PFO Films for Optimized Emission Properties 一种控制PFO薄膜中β相形成以优化发射性能的简单方法

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020315

Qi Zhang, Lang Chi, Gang Hai, Yueting Fang, Xiangchun Li, R. Xia, Wei Huang, E. Gu

引用次数: 24

Application of the Triazolization Reaction to Afford Dihydroartemisinin Derivatives with Anti-HIV Activity 三唑化反应在抗hiv活性双氢青蒿素衍生物中的应用

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020303

Sampad Jana, S. Iram, Joice Thomas, M. Hayat, C. Pannecouque, W. Dehaen

引用次数: 30

Cytotoxicity and Antioxidant Potential of Novel 2-(2-((1H-indol-5yl)methylene)-hydrazinyl)-thiazole Derivatives 新型2-(2-((1h -吲哚-5基)亚甲基)-肼基)-噻唑衍生物的细胞毒性和抗氧化潜力

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020260

A. Grozav, Ioana Porumb, L. Gaina, L. Filip, D. Hanganu

引用次数: 44

Synthesis of Novel Pyrazinamide Derivatives Based on 3-Chloropyrazine-2-carboxamide and Their Antimicrobial Evaluation 基于3-氯吡嗪-2-羧酰胺的新型吡嗪酰胺衍生物的合成及其抗菌性能评价

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020223

O. Janďourek, Marek Tauchman, P. Paterová, K. Konečná, L. Navrátilová, V. Kubíček, O. Holas, J. Zítko, M. Doležal

{"title":"Synthesis of Novel Pyrazinamide Derivatives Based on 3-Chloropyrazine-2-carboxamide and Their Antimicrobial Evaluation","authors":"O. Janďourek, Marek Tauchman, P. Paterová, K. Konečná, L. Navrátilová, V. Kubíček, O. Holas, J. Zítko, M. Doležal","doi":"10.3390/molecules22020223","DOIUrl":"https://doi.org/10.3390/molecules22020223","url":null,"abstract":"Aminodehalogenation of 3-chloropyrazine-2-carboxamide with variously substituted benzylamines yielded a series of fifteen 3-benzylaminopyrazine-2-carboxamides. Four compounds possessed in vitro whole cell activity against Mycobacterium tuberculosis H37Rv that was at least equivalent to that of the standard pyrazinamide. MIC values ranged from 6 to 42 µM. The best MIC (6 µM) was displayed by 3-[(4-methylbenzyl)amino]pyrazine-2-carboxamide (8) that also showed low cytotoxicity in the HepG2 cell line (IC50 ≥ 250 µM). Only moderate activity against Enterococcus faecalis and Staphylococcus aureus was observed. No activity was detected against any of tested fungal strains. Molecular docking with mycobacterial enoyl-ACP reductase (InhA) was performed to investigate the possible target of the prepared compounds. Active compounds shared common binding interactions of known InhA inhibitors. Antimycobacterial activity of the title compounds was compared to the previously published benzylamino-substituted pyrazines with differing substitution on the pyrazine core (carbonitrile moiety). The title series possessed comparable activity and lower cytotoxicity than molecules containing a carbonitrile group on the pyrazine ring.","PeriodicalId":19033,"journal":{"name":"Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82814981","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: 12

Phytochemical Study of Tapirira guianensis Leaves Guided by Vasodilatory and Antioxidant Activities 广西貘叶片血管扩张和抗氧化活性的植物化学研究

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020304

A. Rodrigues, D. Guimarães, T. Konno, L. Tinoco, T. Barth, F. Aguiar, N. Lopes, I. Leal, J. Raimundo, M. Muzitano

{"title":"Phytochemical Study of Tapirira guianensis Leaves Guided by Vasodilatory and Antioxidant Activities","authors":"A. Rodrigues, D. Guimarães, T. Konno, L. Tinoco, T. Barth, F. Aguiar, N. Lopes, I. Leal, J. Raimundo, M. Muzitano","doi":"10.3390/molecules22020304","DOIUrl":"https://doi.org/10.3390/molecules22020304","url":null,"abstract":"The aim of this research was to perform a phytochemical study of the methanol leaves extract of T. guianensis (MET) guided by vasodilatory and antioxidant activities. The chemical profile of MET and the ethyl acetate fraction (EA fraction) was determined by HPLC-UV-MS and EA fraction guided fractionation by reverse-phase chromatography. The vasorelaxant effects of MET, fractions, sub-fractions and constituents were assessed on rat aorta pre-contracted with phenylephrine. Antioxidant activity was evaluated by using a DPPH assay. The results show that MET-induced vasodilation was dependent on NO/cGMP; and that the PI3K/Akt pathway seems to be the main route involved in eNOS activation. The EA fraction showed greater vasodilatory and antioxidant potency and was submitted to further fractionation. This allowed the isolation and characterization of quercetin, quercetin 3-O-(6″-O-galloyl)-β-d-galactopyranoside and 1,4,6-tri-O-galloyl-β-d-glucose. Also, galloyl-HHDP-hexoside and myricetin deoxyhexoside were identified by HPLC-UV-MS. These compounds are being described for the first time for T. guianensis. 1,4,6-tri-O-galloyl-β-d-glucose and quercetin 3-O-(6″-O-galloyl)-β-d-galactopyranoside showed no vasodilatory activity. Quercetin and myricetin glycoside seems to contribute to the MET activity, since they have been reported as vasodilatory flavonoids. MET-induced vasodilation could contribute to the hypotensive effect of T. guianensis previously reported.","PeriodicalId":19033,"journal":{"name":"Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86107547","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: 8

Advances of Vibrational Spectroscopic Technologies in Life Sciences 振动光谱技术在生命科学中的研究进展

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020278

C. Huck

引用次数: 7

Preparation of “Constrained Geometry” Titanium Complexes of [1,2]Azasilinane Framework for Ethylene/1-Octene Copolymerization [1,2]偶氮硅烷框架“约束几何”钛配合物在乙烯/1-辛烯共聚中的制备

Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry Pub Date : 2017-02-01 DOI: 10.3390/molecules22020258

Seul Lee, S. Park, Jin Gu Kim, C. S. Kim, B. Lee

{"title":"Preparation of “Constrained Geometry” Titanium Complexes of [1,2]Azasilinane Framework for Ethylene/1-Octene Copolymerization","authors":"Seul Lee, S. Park, Jin Gu Kim, C. S. Kim, B. Lee","doi":"10.3390/molecules22020258","DOIUrl":"https://doi.org/10.3390/molecules22020258","url":null,"abstract":"The Me2Si-bridged ansa-Cp/amido half-metallocene, [Me2Si(η5-Me4C5)(NtBu)]TiCl2, termed a “constrained-geometry catalyst (CGC)”, is a representative homogeneous Ziegler catalyst. CGC derivatives with the [1,2]azasilinane framework, in which the amide alkyl substituent is joined by the Si-bridge, were prepared, and the catalytic performances of these species was studied. Me4C5HSi(Me)(CH2CH=CH2)-NH(C(R)(R’)CH=CH2) (R, R’ = H or methyl; Me4C5H = tetramethylcyclopentadienyl) was susceptible to ring closure metathesis (RCM) when treated with Schrock’s Mo-catalyst to afford -Si(Me4C5H)(Me)CH2CH=CHC(R)(R’)NH- containing a six-membered ring framework. Using the precursors and the products of RCM, various CGC derivatives, i.e., [-Si(η5-Me4C5)(Me)CH2CH=CHC(R)(H)N-]TiMe2 (13, R = H; 15, R = Me), [-Si(η5-Me4C5)(Me)CH2CH2CH2CH2N]TiMe2 (14), [(η5-Me4C5)Si(Me)(CH2CH=CH2)NCH2CH=CH2]TiMe2 (16), [(η5-Me4C5)Si (Me)(CH=CH2)NCH2CH=CH2]TiMe2 (17), and [(η5-Me4C5)Si(Me)(CH2CH3)NCH2CH2CH3]TiMe2 (18), were prepared. The catalytic activity of the newly prepared complexes was lower than that of CGC when activated with [Ph3C][B(C6F5)4]/iBu3Al. However, the catalytic activity of these species was improved by using tetrabutylaluminoxane ([iBu2Al]2O) instead of iBu3Al and the activity of 14/[Ph3C][B(C6F5)4]/[iBu2Al]2O was comparable to that of CGC/[Ph3C][B(C6F5)4]/iBu3Al (4.7 and 5.0 × 106 g/mol-Ti, respectively). Advantageously, the newly prepared complexes produced higher molecular weight poly(ethylene-co-1-octene)s than CGC.","PeriodicalId":19033,"journal":{"name":"Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80901484","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: 12