The Royal Society of Chemistry最新文献_第5页

Discovery of nostatin A, an azole-containing proteusin with prominent cytostatic and pro-apoptotic activity. 发现了一种含有唑的蛋白苷，具有显著的细胞抑制和促进凋亡活性。

IF 2.9 3区化学

Organic & Biomolecular Chemistry Pub Date : 2024-11-22 DOI: 10.1039/d4ob01395f

Kateřina Delawská, Jan Hájek, Kateřina Voráčová, Marek Kuzma, Jan Mareš, Kateřina Vicková, Alan Kádek, Dominika Tučková, Filip Gallob, Petra Divoká, Martin Moos, Stanislav Opekar, Lukas Koch, Kumar Saurav, David Sedlák, Petr Novák, Petra Urajová, Jason Dean, Radek Gažák, Timo J H Niedermeyer, Zdeněk Kameník, Petr Šimek, Andreas Villunger, Pavel Hrouzek

{"title":"Discovery of nostatin A, an azole-containing proteusin with prominent cytostatic and pro-apoptotic activity.","authors":"Kateřina Delawská, Jan Hájek, Kateřina Voráčová, Marek Kuzma, Jan Mareš, Kateřina Vicková, Alan Kádek, Dominika Tučková, Filip Gallob, Petra Divoká, Martin Moos, Stanislav Opekar, Lukas Koch, Kumar Saurav, David Sedlák, Petr Novák, Petra Urajová, Jason Dean, Radek Gažák, Timo J H Niedermeyer, Zdeněk Kameník, Petr Šimek, Andreas Villunger, Pavel Hrouzek","doi":"10.1039/d4ob01395f","DOIUrl":"10.1039/d4ob01395f","url":null,"abstract":"Ribosomally synthesized and post-translationally modified peptides (RiPPs) are intriguing compounds with potential pharmacological applications. While many RiPPs are known as antimicrobial agents, a limited number of RiPPs with anti-proliferative effects in cancer cells are available. Here we report the discovery of nostatin A (NosA), a highly modified RiPP belonging among nitrile hydratase-like leader peptide RiPPs (proteusins), isolated from a terrestrial cyanobacterium Nostoc sp. Its structure was established based on the core peptide sequence encoded in the biosynthetic gene cluster recovered from the producing strain and subsequent detailed nuclear magnetic resonance and high-resolution mass spectrometry analyses. NosA, composed of a 30 amino-acid peptide core, features a unique combination of moieties previously not reported in RiPPs: the simultaneous presence of oxazole/thiazole heterocycles, dehydrobutyrine/dehydroalanine residues, and a sactionine bond. NosA includes an isobutyl-modified proline residue, highly unusual in natural products. NosA inhibits proliferation of multiple cancer cell lines at low nanomolar concentration while showing no hemolysis. It induces cell cycle arrest in S-phase followed by mitochondrial apoptosis employing a mechanism different from known tubulin binding and DNA damaging compounds. NosA also inhibits Staphylococcus strains while it exhibits no effect in other tested bacteria or yeasts. Due to its novel structure and selective bioactivity, NosA represents an excellent candidate for combinatorial chemistry approaches leading to development of novel NosA-based lead compounds.","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Establishment of a Raman microsphere-based immunochromatographic method for the combined detection of influenza A and B viruses and SARS-CoV-2 antigen on a single T-line† 建立一种基于拉曼微球的免疫层析方法，用于在单一 T 线†上联合检测甲型和乙型流感病毒以及 SARS-CoV-2 抗原

IF 3.9 3区化学

RSC Advances Pub Date : 2024-11-22 DOI: 10.1039/D4RA05483K

Aolin Zhu, Binbin Zhao, Jiutong Li, Xinxia Li, Qian Shi, Xin Zhang, Dongmei Lu and Dong Yan

{"title":"Establishment of a Raman microsphere-based immunochromatographic method for the combined detection of influenza A and B viruses and SARS-CoV-2 antigen on a single T-line†","authors":"Aolin Zhu, Binbin Zhao, Jiutong Li, Xinxia Li, Qian Shi, Xin Zhang, Dongmei Lu and Dong Yan","doi":"10.1039/D4RA05483K","DOIUrl":"https://doi.org/10.1039/D4RA05483K","url":null,"abstract":"A simple and rapid method based on Raman microsphere immunochromatography was developed in this study for the simultaneous detection of influenza A and B viruses and SARS-CoV-2 on a single test T-line. Three types of Raman microspheres with different Raman characteristics were used as the signal sources and were labelled with monoclonal antibodies against FluA, FluB and SARS-CoV-2, respectively. A mixture of antibodies containing anti-FluA monoclonal antibody, anti-FluB monoclonal antibody and anti-SARS-CoV-2 was sprayed on the detection line (T), and goat polyclonal antibody to chicken (IgY) encapsulated on the quality control line (C), for qualitative detection of these three viruses by the double antibody sandwich method. The results demonstrated that the LOD values were 0.5 ng mL−1 for FluA, 0.25 ng mL−1 for FluB, and 0.5 ng mL−1 for SARS-CoV-2. The method showed good repeatability for the respiratory viral antigens, with CV values below 15%. Oxymetazoline and commonly used oral medications did not interfere with the test results; the strips did not cross-react with common respiratory virus antigens, demonstrating good specificity. This method does not require any complicated pre-treatment, and all three viruses can be detected simultaneously by titrating one sample, which improves the detection efficiency. The Respiratory Pathogen Multiplex provides a scientific basis for preventing and controlling the spread of respiratory diseases by analyzing data to understand epidemiological trends and the spread of pathogens.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37498-37511"},"PeriodicalIF":3.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra05483k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A glutenin protein corona ameliorated TiO₂ nanoparticle-induced gut barrier dysfunction and altered the gut microbiota composition. 谷蛋白冠改善了二氧化钛纳米粒子诱发的肠道屏障功能障碍，并改变了肠道微生物群的组成。

IF 5.1 1区农林科学

Food & Function Pub Date : 2024-11-22 DOI: 10.1039/d4fo04355c

Shichao Mi, Mingyang Shen, Zimo Liu, Yingying Yu, Honghong Shan, Jin Cao, David Julian McClements, Chongjiang Cao, Xiao Xu, Biao Yuan

{"title":"A glutenin protein corona ameliorated TiO2 nanoparticle-induced gut barrier dysfunction and altered the gut microbiota composition.","authors":"Shichao Mi, Mingyang Shen, Zimo Liu, Yingying Yu, Honghong Shan, Jin Cao, David Julian McClements, Chongjiang Cao, Xiao Xu, Biao Yuan","doi":"10.1039/d4fo04355c","DOIUrl":"https://doi.org/10.1039/d4fo04355c","url":null,"abstract":"Previously, we found that glutenin proteins formed a protein corona around food-grade titanium dioxide (TiO2) nanoparticles. The protein corona would alter the gastrointestinal behavior and biological activity of the nanoparticles. Here, in this study, the influence of protein corona formation on the adverse effects of TiO2 nanoparticles on gut barrier function using in vitro and in vivo assays and the potential mechanism were investigated and elucidated. Our findings showed that the presence of the protein corona mitigated gut barrier injury caused by TiO2 nanoparticles while increasing gene expression for tight junction proteins; for example, in vitro gastrointestinal digestion and fermentation experiments showed that the glutenin-TiO2 protein corona was relatively stable to digestion and influenced the composition of the gut microbiota. Specifically, the glutenin-TiO2 protein corona increased the relative abundance of beneficial bacteria such as Bifidobacterium, Parasutterella, and Bacillus while reducing the relative abundance of harmful bacteria like Streptococcus. Moreover, the formation of the protein corona reduced the cytotoxicity of the TiO2 nanoparticles to Caco-2 and RAW264.7 cells. Mechanistically, we found that the presence of the glutenin-TiO2 protein corona decreased the production of reactive oxygen species and increased the mitochondrial membrane potential in both Caco-2 and RAW264.7 cells compared to TiO2 nanoparticles alone. This study provides valuable mechanistic insights into the potential biological effects of protein corona formation around food inorganic nanoparticles in the food industry.","PeriodicalId":77,"journal":{"name":"Food & Function","volume":" ","pages":""},"PeriodicalIF":5.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Visualizing fiber end geometry effects on stress distribution in composites using mechanophores. 利用力学透镜观察纤维端部几何形状对复合材料应力分布的影响。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-22 DOI: 10.1039/d4sm00967c

Nazmul Haque, Hao Chun Chang, Chia-Chih Chang, Chelsea S Davis

{"title":"Visualizing fiber end geometry effects on stress distribution in composites using mechanophores.","authors":"Nazmul Haque, Hao Chun Chang, Chia-Chih Chang, Chelsea S Davis","doi":"10.1039/d4sm00967c","DOIUrl":"https://doi.org/10.1039/d4sm00967c","url":null,"abstract":"Localized stress concentrations at fiber ends in short fiber-reinforced polymer composites (SFRCs) significantly affect their mechanical properties. Our research targets these stress concentrations by embedding nitro-spiropyran (SPN) mechanophores into the polymer matrix. SPN mechanophores change color under mechanical stress, allowing us to visualize and quantify stress distributions at the fiber ends. We utilize glass fibers as the reinforcing material and employ confocal fluorescence microscopy to detect color changes in the SPN mechanophores, providing real-time insights into the stress distribution. By combining this mechanophore-based stress sensing with finite element analysis (FEA), we evaluate localized stresses that develop during a single fiber pull-out test near different fiber end geometries-flat, cone, round, and sharp. This method precisely quantifies stress distributions for each fiber end geometry. The mechanophore activation intensity varies with fiber end geometry and pull-out displacement. Our results indicate that round fiber ends exhibit more gradual stress transfer into the matrix, promoting effective stress distribution. Also, different fiber end geometries lead to distinct failure mechanisms. These findings demonstrate that fiber end geometry plays a crucial role in stress distribution management, critical for optimizing composite design and enhancing the reliability of SFRCs in practical applications. By integrating mechanophores for real-time stress visualization, we can accurately map quantified stress distributions that arise during loading and identify failure mechanisms in polymer composites, offering a comprehensive approach to enhancing their durability and performance.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cp*Co(III)-catalyzed synthesis of isoquinolones via controlled annulation of primary arylamides with internal alkynes. Cp*Co(III)-catalyzed synthesis of isoquinolones via controlled annulation of primary arylamides with internal alkynes.

IF 2.9 3区化学

Organic & Biomolecular Chemistry Pub Date : 2024-11-22 DOI: 10.1039/d4ob01693a

Saksham Mishra, Akanksha Singh Baghel, Amit Kumar

引用次数: 0

One-step selective synthesis of doubly and triply fused chiral boroloborole derivatives. 一步选择性合成双、三融合手性硼硼烷衍生物。

IF 4.3 2区化学

Chemical Communications Pub Date : 2024-11-22 DOI: 10.1039/d4cc04433a

Josina L Bohlen, Nele Wieprecht, Merle Arrowsmith, Alena Häfner, Marco Neder, Holger Braunschweig

引用次数: 0

Size dependent polarities in tribocharged dust aggregates. 三电荷尘埃聚集体中与尺寸相关的极性。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-22 DOI: 10.1039/d4sm01013b

Christopher Grünebeck, Florence Chioma Onyeagusi, Jens Teiser, Gerhard Wurm

引用次数: 0

Sustainably transforming biomass into advanced carbon materials for solid-state supercapacitors: a review. 可持续地将生物质转化为用于固态超级电容器的先进碳材料：综述。

IF 4.3 2区化学

Chemical Communications Pub Date : 2024-11-22 DOI: 10.1039/d4cc04762a

Ruibo Fan, Beichen Xue, Pengfei Tian, Xuesong Zhang, Xiangzhou Yuan, Huiyan Zhang

{"title":"Sustainably transforming biomass into advanced carbon materials for solid-state supercapacitors: a review.","authors":"Ruibo Fan, Beichen Xue, Pengfei Tian, Xuesong Zhang, Xiangzhou Yuan, Huiyan Zhang","doi":"10.1039/d4cc04762a","DOIUrl":"https://doi.org/10.1039/d4cc04762a","url":null,"abstract":"Biomass-derived carbon materials (BDCMs) are widely considered as promising and practical candidates for electrode materials of solid-state supercapacitors (SSCs), due to their low cost, good chemical and mechanical stabilities, excellent electrical conductivity, and high deployment feasibility. Numerous investigations have recently been conducted for sustainably transforming biomass into electrode materials with high electrochemical performance in SSCs, even guided by data-driven approaches. Therefore, this review addresses conventional and emerging synthesis routes for BDCM-based electrode materials and discusses recent advances in energy storage mechanisms and electrochemical performance enhancement of BDCMs for SSCs, improving electrode preparation and performance optimization of BDCMs in a practical and efficient manner. As two of the most powerful tools for novel material discovery and design, machine learning (ML) and 3D printing technologies are introduced to provide closed-loop guidelines for accurately and efficiently producing BDCMs with excellent electrochemical performance; main challenges for successfully applying ML and 3D printing methodologies are also addressed, providing critical guidelines for potential innovation and future development of BDCM-based SSCs. In this review, from life-cycle perspective, environmental benefits are assessed for BDCM-based SSCs, being highlighted as a promising and practical alternative to solidify energy security and achieve sustainable biomass management. The concluding remarks and future prospects are finally discussed to provide valuable insights for academic researchers and governmental policymakers. With concerted efforts, sustainably transforming biomass into high-performance electrode materials for SSCs is beneficial to achieving UN Sustainable Development Goals 7, 11-13.","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling the relative response factor of small molecules in positive electrospray ionization† 小分子在正电喷雾离子化过程中的相对响应因子建模†。

IF 3.9 3区化学

RSC Advances Pub Date : 2024-11-22 DOI: 10.1039/D4RA06695B

Dimitri Abrahamsson, Lelouda-Athanasia Koronaiou, Trevor Johnson, Junjie Yang, Xiaowen Ji and Dimitra A. Lambropoulou

{"title":"Modeling the relative response factor of small molecules in positive electrospray ionization†","authors":"Dimitri Abrahamsson, Lelouda-Athanasia Koronaiou, Trevor Johnson, Junjie Yang, Xiaowen Ji and Dimitra A. Lambropoulou","doi":"10.1039/D4RA06695B","DOIUrl":"https://doi.org/10.1039/D4RA06695B","url":null,"abstract":"Technological advancements in liquid chromatography (LC) electrospray ionization (ESI) high-resolution mass spectrometry (HRMS) have made it an increasingly popular analytical technique in non-targeted analysis (NTA) of environmental and biological samples. One critical limitation of current methods in NTA is the lack of available analytical standards for many of the compounds detected in biological and environmental samples. Computational approaches can provide estimates of concentrations by modeling the relative response factor of a compound (RRF) expressed as the peak area of a given peak divided by its concentration. In this paper, we explore the application of molecular dynamics (MD) in the development of a computational workflow for predicting RRF. We obtained measurements of RRF for 48 compounds with LC – quadrupole time-of-flight (QTOF) MS and calculated their RRF. We used the CGenFF force field to generate the topologies and GROMACS to conduct the (MD) simulations. We calculated the Lennard-Jones and Coulomb interactions between the analytes and all other molecules in the ESI droplet, which were then sampled to construct a multilinear regression model for predicting RRF using Monte Carlo simulations. The best performing model showed a coefficient of determination (R2) of 0.82 and a mean absolute error (MAE) of 0.13 log units. This performance is comparable to other predictive models including machine learning models. While there is a need for further evaluation of diverse chemical structures, our approach showed promise in predictions of RRF.","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 50","pages":" 37470-37482"},"PeriodicalIF":3.9,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra06695b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties of soft hydrogels: assessment by scanning ion-conductance microscopy and atomic force microscopy. 软水凝胶的机械特性：通过扫描离子传导显微镜和原子力显微镜进行评估。

IF 2.9 3区化学

Soft Matter Pub Date : 2024-11-21 DOI: 10.1039/d4sm00966e

Tatiana N Tikhonova, Yuri M Efremov, Vasilii S Kolmogorov, Aleksei P Iakovlev, Nikolay N Sysoev, Peter S Timashev, Victor V Fadeev, Alexander S Tivtikyan, Sergey V Salikhov, Petr V Gorelkin, Yuri E Korchev, Alexander S Erofeev, Evgeny A Shirshin

{"title":"Mechanical properties of soft hydrogels: assessment by scanning ion-conductance microscopy and atomic force microscopy.","authors":"Tatiana N Tikhonova, Yuri M Efremov, Vasilii S Kolmogorov, Aleksei P Iakovlev, Nikolay N Sysoev, Peter S Timashev, Victor V Fadeev, Alexander S Tivtikyan, Sergey V Salikhov, Petr V Gorelkin, Yuri E Korchev, Alexander S Erofeev, Evgeny A Shirshin","doi":"10.1039/d4sm00966e","DOIUrl":"https://doi.org/10.1039/d4sm00966e","url":null,"abstract":"The growing interest in biomimetic hydrogels is due to their successful applications in tissue engineering, 3D cell culturing and drug delivery. The major characteristics of hydrogels include swelling, porosity, degradation rate, biocompatibility, and mechanical properties. Poor mechanical properties can be regarded as the main limitation for the use of hydrogels in tissue engineering, and advanced techniques for its precise evaluation are of interest. The current research aims to demonstrate the suitability of scanning ion conductance microscopy (SICM) for assessing the stiffness of various hydrogels - Fmoc-FF peptide hydrogel, polyacrylamide and gelatin, - which differ by two orders of magnitude in Young's modulus (E). We provide a direct comparison between SICM measurements and atomic force microscopy (AFM) data, the latter being a widely used method for assessing the mechanical properties of scaffolds. The results of these methods showed good agreement, however, for materials with various stiffness two SICM-based approaches - application of hydrostatic pressure and application of intrinsic force - should be used. For hydrogels with Young's modulus of more than 2.5 kPa the application of SICM using hydrostatic pressure is recommended, whereas for soft materials with E ∼ 200-400 Pa the technique using intrinsic force can also be applied. We have shown that SICM and AFM methods can be used for the evaluation of the mechanical properties of soft hydrogels with nanometer resolution, while SICM is a completely non-invasive method, which requires a minimum influence on the sample structure.","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142680020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0