期刊：
NEW JOURNAL OF CHEMISTRY,2024年48(6):2855-2865 ISSN：1144-0546
通讯作者：
Sun, YK;Sun, Yunkai;Yang, PF
作者机构：
[Ding, Yi; Sun, Yunkai] Changzhou Inst Technol, Sch Chem Engn & Mat, Changzhou 213032, Peoples R China.;[Yang, Pengfei; Liu, Cheng; Sun, Yunkai; Yin, Na] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Ding, Yi; Sun, Yunkai] Changzhou Inst Technol, Ind Coll Carbon Fiber & New Mat, Changzhou 213032, Peoples R China.
通讯机构：
[Sun, YK ] C;[Sun, YK; Yang, PF ] U;Changzhou Inst Technol, Sch Chem Engn & Mat, Changzhou 213032, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Changzhou Inst Technol, Ind Coll Carbon Fiber & New Mat, Changzhou 213032, Peoples R China.
摘要：
Nanoscale zero-valent iron (nZVI) was cured by vulcanization and biochar functionalization to overcome the tendency of oxidation and aggregation, and the sulfurized nano-zero-valent iron functional material supported by amino biochar (SnZVI-BC-NH2) was obtained, which was used to remove U(VI) from wastewater in this study. A variety of measurements (SEM, TEM, XRD, BET, VSM, FT-IR, and XPS) were used to characterize the morphology, structure, magnetic properties, characteristic functional groups and chemical bonds of SnZVI-BC-NH2. Analysis results confirm that the aminated biochar can support sulfurized nZVI well. The good kinetics, thermodynamics, and large removal capacity data (at pH 6, T = 298 K, Q(m) = 158.1 mg g(-1)) indicate that SnZVI-BC-NH2 has excellent removal performance for U(VI), and the experimental data are in good agreement with the pseudo-second-order kinetic model. Cycling and anti-oxidation tests demonstrate that the FeSx shell plays a crucial role in enhancing the removal of SnZVI-BC-NH2 on U(VI). XPS and FT-IR analysis results show that SnZVI-BC-NH2 removes U(VI) through the synergistic effect of adsorption and reduction.
摘要：
Electrosorption holds extraordinary promise for uranium (U(VI)) capture but is still limited by the finite accessible active sites of electrode materials, poor surface wettability and its intrinsic co-ion repulsion effect. Here we originally designed KOH-etched porous graphitic carbon nitride (g-C3N4) as active material, and multi-functional crosslinked xanthan gum-polyacrylic acid (XG-PAA) as binder to fabricate g-C3N4-X electrode for U(VI) capture. The abundant in-plane nanopores on 2D g-C3N4 lamellar, rich O- and N-containing active sites, and 3D tough interconnected conductive architecture, endowed g-C3N4-X electrode with fast electron/ion transport channels, alleviated co-ions exclusion, superior electrochemical properties, and hydrophilicity. These unique structure characteristics enabled U(VI) ions to form micro electric-field attraction with negatively charged COO- groups in advance to alleviate co-ion repulsion, then to electro-migrate towards and coordinate with active sites, and eventually to be electrocatalytic reduced into U(IV) deposits. Consequently, the g-C3N4-X electrode exhibited a 1.87 times faster adsorption kinetics, a much higher removal ratio of 98.1% within 70 min than traditional PVDF-bound electrode. Meanwhile, the cumulative adsorption capacity of g-C3N4-X electrode after six cycles was up to 1459.1 mg g−1. This efficient, scalable, and cost-effective g-C3N4-X electrode represents a significant step forward toward the practical applications of U(VI) electrosorption.
作者机构：
[Yufei Lei; Qi Li; Qian Li; Dongxiu He; Jinhua Xue; Lifu Liao; Jikai Wang] School of Chemistry and Chemical Engineering, School of Pharmaceutical Science, School of Public Health, Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, Hunan 421001, P. R. China;State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, Hunan 410082, P. R. China;[Xilin Xiao] School of Chemistry and Chemical Engineering, School of Pharmaceutical Science, School of Public Health, Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, Hunan 421001, P. R. China<&wdkj&>State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, Hunan 410082, P. R. China
通讯机构：
[Jikai Wang; Xilin Xiao] S;School of Chemistry and Chemical Engineering, School of Pharmaceutical Science, School of Public Health, Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, Hunan 421001, P. R. China<&wdkj&>School of Chemistry and Chemical Engineering, School of Pharmaceutical Science, School of Public Health, Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang, Hunan 421001, P. R. China<&wdkj&>State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, Hunan 410082, P. R. China
摘要：
In this paper, nitrogen-doped carbon dots (NCDs) were synthesized via a facile hydrothermal method using gum arabic (GA) and tris(hydroxymethyl)methyl aminomethane (tris) as precursors. The resultant NCDs show uniform size distribution and stable optical performance. Then a fluorescent signal quenching probe based on NCDs was proposed for the quantitative detection of mercury ions (Hg2+). The developed fluorescent nanoprobe based on NCDs demonstrated a good linear relationship in the range of 10 to 120 μM (R2 = 0.99265) for toxic mercury(II), with a detection limit of 4.87 μM. Additionally, the present assay system could be efficiently used for the detection of Hg2+ in real water samples with a satisfactory recovery rate (96.11–104.04%). The metal-free NCDs, which exhibited little cytotoxicity, were successfully applied to in vitro fluorescence imaging of human triple negative breast cancer (TNBC) cells, achieving visualization of Hg2+ in cells. With good water solubility and biocompatibility, the nitrogen-doped carbon dots synthesized by this economical and ecologically friendly process are suitable for use in analytical testing and biological research.
作者机构：
[Li, Ye; Zhang, Yuexin; Li, Chunquan; Zhao, Yu; Huang, Xuemei; Xie, Liyuan; Zhang, Guorui; Zhao, Jun; Fan, Shifan; Song, Chao] Univ South China, Hengyang Med Sch, Affiliated Hosp 1, Hengyang 421001, Hunan, Peoples R China.;[Li, Ye; Zhang, Yuexin; Li, Chunquan; Zhao, Yu; Huang, Xuemei; Xie, Liyuan; Zhang, Guorui; Zhao, Jun; Fan, Shifan; Song, Chao] Univ South China, Hengyang Med Sch, MOE Key Lab Rare Pediat Dis, Hengyang 421001, Hunan, Peoples R China.;[Li, Ye; Zhang, Yuexin; Zhang, Qinyi; Li, Chunquan; Zhao, Yu; Huang, Xuemei; Xie, Liyuan; Zhang, Guorui; Fan, Shifan; Song, Chao] Univ South China, Sch Comp, Hengyang 421001, Hunan, Peoples R China.;[Li, Chunquan] Univ South China, Hunan Prov Maternal & Child Hlth Care Hosp, Hengyang Med Sch, Key Lab Birth Defect Res & Prevent,Natl Hlth Commi, Hengyang 421001, Hunan, Peoples R China.;[Li, Ye; Zhang, Yuexin; Li, Chunquan; Zhao, Yu; Huang, Xuemei; Xie, Liyuan; Zhang, Guorui; Fan, Shifan; Song, Chao] Univ South China, Affiliated Hosp 1, Cardiovasc Lab Big Data & Imaging ArtificialIntell, Hengyang Med Sch, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Li, CQ ] U;Univ South China, Hengyang Med Sch, Affiliated Hosp 1, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Hengyang Med Sch, MOE Key Lab Rare Pediat Dis, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Sch Comp, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Hunan Prov Maternal & Child Hlth Care Hosp, Hengyang Med Sch, Key Lab Birth Defect Res & Prevent,Natl Hlth Commi, Hengyang 421001, Hunan, Peoples R China.
关键词：
genes;mice;candidate disease gene;inference;multiomics;oncogenes;enhancer of transcription;cell lines;transcription factor
摘要：
Gene regulatory networks (GRNs) are interpretable graph models encompassing the regulatory interactions between transcription factors (TFs) and their downstream target genes. Making sense of the topology and dynamics of GRNs is fundamental to interpreting the mechanisms of disease etiology and translating corresponding findings into novel therapies. Recent advances in single-cell multi-omics techniques have prompted the computational inference of GRNs from single-cell transcriptomic and epigenomic data at an unprecedented resolution. Here, we present scGRN (https://bio.liclab.net/scGRN/), a comprehensive single-cell multi-omics gene regulatory network platform of human and mouse. The current version of scGRN catalogs 237 051 cell type-specific GRNs (62 999 692 TF-target gene pairs), covering 160 tissues/cell lines and 1324 single-cell samples. scGRN is the first resource documenting large-scale cell type-specific GRN information of diverse human and mouse conditions inferred from single-cell multi-omics data. We have implemented multiple online tools for effective GRN analysis, including differential TF-target network analysis, TF enrichment analysis, and pathway downstream analysis. We also provided details about TF binding to promoters, super-enhancers and typical enhancers of target genes in GRNs. Taken together, scGRN is an integrative and useful platform for searching, browsing, analyzing, visualizing and downloading GRNs of interest, enabling insight into the differences in regulatory mechanisms across diverse conditions. Graphical Abstract
作者：
Ji, Hong-Tao;Jiang, Jun;He, Wei-Bao;Lu, Yu-Han;Liu, Yuan-Yuan;...
期刊：
JOURNAL OF ORGANIC CHEMISTRY,2024年89(6):4113-4119 ISSN：0022-3263
通讯作者：
He, WM
作者机构：
[He, Wei-Bao; Lu, Yu-Han; He, Wei-Min; Li, Xiao; Ji, Hong-Tao; Liu, Yuan-Yuan; Jiang, Jun; He, WM] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[He, WM ] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
摘要：
The first example of an electrochemical multicomponent synthesis of selenium-containing compounds with inexpensive and abundant elemental selenium as the selenating reagent was developed. A variety of selenazol-2-amines were constructed in high yields with good functional group tolerance under metal-free and chemical oxidant-free conditions.
期刊：
European Journal of Medicinal Chemistry,2024年267:116210 ISSN：0223-5234
通讯作者：
Pengbing Mi<&wdkj&>You Lv
作者机构：
[Li, Xinhao; Mi, Pengbing; Yu, Zhixin; Chen, Limei; Lin, Yuqing; Zheng, Xing] Department of Pharmacy, Hengyang Medicinal School, University of South China, Hengyang, Hunan, 421001, China;[Tang, Yahua] The Affiliated Nanhua Hospital, Department of Pharmacy, Institute of Clinical Pharmacy, Hengyang Medical School, University of South China, Hunan, 421001, China;[Lang, Jia-Jia; Lin, Ying-Wu] School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China;[Lang, Jia-Jia] Key Lab of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang, Hunan, 421001, China;[Zheng, Xing] Department of Pharmacy, Hunan Vocational College of Science and Technology, Changsha, Hunan, 410004, China
通讯机构：
[Pengbing Mi] D;[You Lv] C;College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an, Shaanxi, 710021, China<&wdkj&>Xi'an Amazinggene Co., Ltd, Xi'an, Shaanxi, 710026, China<&wdkj&>Department of Pharmacy, Hengyang Medicinal School, University of South China, Hengyang, Hunan, 421001, China<&wdkj&>Key Lab of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang, Hunan, 421001, China
摘要：
The development of highly selective Janus Kinase 1 (JAK1) inhibitors is crucial for improving efficacy and minimizing adverse effects in the clinical treatment of autoimmune diseases. In a prior study, we designed a series of C-5 4-pyrazol substituted pyrrolopyridine derivatives that demonstrated significant potency against JAK1, with a 10∼20-fold selectivity over Janus Kinase 2 (JAK2). Building on this foundation, we adopted orthogonal strategy by modifying the C-5 position with 3-pyrazol/4-pyrazol/3-pyrrol groups and tail with substituted benzyl groups on the pyrrolopyridine head to enhance both potency and selectivity. In this endeavor, we have identified several compounds that exhibit excellent potency and selectivity for JAK1. Notably, compounds 12b and 12e, which combined 4-pyrazol group at C-5 site and meta-substituted benzyl tails, displayed IC(50) value with 2.4/2.2nM and high 352-/253-fold selectivity for JAK1 over JAK2 in enzyme assays. Additionally, both compounds showed good JAK1-selective in Ba/F3-TEL-JAK1/2 cell-based assays. These findings mark a substantial improvement, as these compounds are 10-fold more potent and over 10-fold more selective than the best compound identified in our previous study. The noteworthy potency and selectivity properties of compounds 12b and 12e suggest their potential utility in furthering the development of drugs for autoimmune diseases.
摘要：
This study proposes and develops a novel ionic concentration gradient electric generator (i‐CGEG) based on the evaporation rate difference of electrolytes. The i‐CGEG with PVA–Na electrolyte achieves a thermovoltage greater than 200 mV and an energy density of 77.94 J m−2 at a temperature of 323 K. Wearable devices and their corresponding cell modules are also developed to recycle body heat. Abstract Constructing concentration differences between anions and cations at the ends of an ionic conductor is an effective strategy in electricity generation for powering wearable devices. Temperature gradient or salinity gradient is the driving force behind such devices. But their corresponding power generation devices are greatly limited in actual application due to their complex structure and harsh application conditions. In this study, a novel ionic concentration gradient electric generator based on the evaporation difference of the electrolyte is proposed. The device can be constructed without the need for semipermeable membranes, and operation does not need to build a temperature difference. As a demonstration, a PVA–Na ionic hydrogel is prepared as an electrolyte for the device and achieved a thermovoltage of more than 200 mV and an energy density of 77.94 J m−2 at 323 K. Besides, the device exhibits the capability to sustain a continuous voltage output for a duration exceeding 1500 min, as well as enabling charging and discharging cycles for 100 iterations. For practical applications, a module comprising 16 sub‐cells is constructed and successfully utilized to directly power a light‐emitting diode. Wearable devices and their corresponding cell modules are also developed to recycle body heat.
期刊：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2024年26(2):1077-1085 ISSN：1463-9076
通讯作者：
Chuan-Wan Wei<&wdkj&>Ying-Wu Lin
作者机构：
[Wang, Xiao-Juan; Long, Yan; Wei, Chuan-Wan] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;[Gao, Shu-Qin] Key Lab of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang 421001, China;[Lin, Ying-Wu] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Key Lab of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang 421001, China
通讯机构：
[Chuan-Wan Wei; Ying-Wu Lin] S;School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Key Lab of Protein Structure and Function of Universities in Hunan Province, University of South China, Hengyang 421001, China<&wdkj&>School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
摘要：
A Cu-Fe bimetallic hydrogel (2-QF-CuFe-G) was constructed through a simple method. The 2-QF-CuFe-G metallohydrogel possesses excellent peroxidase-like activity to catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H(2)O(2). The catalytic mechanism was confirmed by the addition of (•)OH radical scavenger isopropyl alcohol (IPA), tert-butyl alcohol (TBA) and ˙OH trapping agent terephthalic acid (TA). Remarkably, the resultant blue ox-TMB system can be used to selectively and sensitively detect ascorbic acid (AA) with an LOD of 0.93 μM in the range of 4-36 μM through the colorimetric method. Moreover, the assay based on the 2-QF-CuFe-G metallohydrogel can be successfully applied to detect AA in fresh fruits.
期刊：
Environmental Science and Pollution Research,2024年 ISSN：0944-1344
通讯作者：
Tao, Yuqiang
作者机构：
[Wang, Bingxin; Hu, Hongyuan; Huang, Difei] School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, People's Republic of China;[Tao, Yuqiang] School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, People's Republic of China. taoyuqiang@usc.edu.cn;[Tao, Yuqiang] Hunan Key Laboratory for the Design and Application of Actinide Complexes, Hengyang, 421001, People's Republic of China. taoyuqiang@usc.edu.cn
通讯机构：
[Tao, Yuqiang] S;School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, People's Republic of China.;Hunan Key Laboratory for the Design and Application of Actinide Complexes, Hengyang, 421001, People's Republic of China.
关键词：
Adsorption;Amidoxime group;Chemical modification;Porous glass;Uranium ions;Waster water
摘要：
In this paper, we prepared three types of porous glasses (PGs) with specific surface areas of 311.60 m(2)/g, 277.60 m(2)/g, and 231.38 m(2)/g, respectively, via borosilicate glass phase separation. These glasses were further modified with amidoxime groups (AO) using the hydroxylamine method, yielding adsorbents named 1.5-PG-AO, 2-PG-AO, and 3-PG-AO. The adsorption performance of these adsorbents under various conditions was investigated, including sorption kinetics and adsorption mechanisms. The results reveal that the number of micropores and specific surface area of PG are significantly reduced after AO modification. All three adsorbents exhibit similar adsorption capabilities. Particularly, pH has a pronounced effect on U (VI) adsorption of PG-AO, with a maximum value at pH = 4.5. Equilibrium adsorption is achieved within 2h, with a maximum adsorption capacity of 129mg/g. Notably, a uranium removal rate of 99.94% is attained. Furthermore, the adsorbents show high selectivity in uranium solutions containing Na(+) or K(+). Moreover, the adsorbents demonstrate exceptional regeneration ability, with the removal rate remaining above 80% even after undergoing five adsorption-desorption cycles. The adsorption reaction of uranium on PG-AO involves a combination of multiple processes, with monolayer chemisorption being the dominant mechanism. Both the complex adsorption of AO and the ion exchange and physical adsorption of PG contribute to the adsorption of uranyl ions on the PG-AO adsorbents.
期刊：
International Journal of Biological Macromolecules,2024年254(Pt 3):128008 ISSN：0141-8130
通讯作者：
Wang, HQ
作者机构：
[Wang, HQ; Wang, Hongqiang; Wang, Qingliang; Gan, Jiali; Xin, Qi; Hu, Eming; Le, Dongdong; Lei, Zhiwu] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Wang, Hongqing] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Wang, HQ ] U;Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China.
关键词：
Hydrogel;Phytic acid;Uranium adsorption
摘要：
In order to improve the removal rate of uranium and reduce the harm of radioactive pollution, a physically crosslinked polyvinyl alcohol/phosphorylated chitosan (PPP) hydrogel electrode was designed by freezing thawing method. The results show that PPP hydrogel has a good adsorption effect on uranium, and 200mL of uranium tailings leachate is absorbed, and the treatment efficiency reaches 100% within 15min. PPP hydrogel can adapt to a wide range of pH conditions and exhibit excellent adsorption efficiency in the range of 3-9. At the same time, PPP hydrogel maintains an adsorption efficiency of over 85% for 950mg/L uranium solution. This lays the foundation for the practical application of PPP hydrogel. In addition, PPP hydrogel also exhibits good repeatability, after 7cycles, the material still retains 95% of its initial performance. The synergistic effect of various functional groups such as phosphate, hydroxyl, and ammonium in the material is the main mechanism of PPP's adsorption capacity for uranium. Furthermore, electrochemical adsorption method significantly enhances the adsorption performance of PPP hydrogel.
摘要：
Land-based uranium resources are becoming scarce because of the widespread development and use of nuclear energy. Therefore, to make up for the shortage of uranium resources, a new chitosan/carboxymethyl-β-cyclodextrin/quaternary ammonium salt-functionalized amidoxime carbon adsorbent (CSAOCF) was designed and synthesized for extracting uranium from seawater. Experimental studies show that the adsorption of uranium by CSAOCF is a spontaneous endothermic reaction and chemical adsorption. The theoretical maximum adsorption capacity of uranium can reach 726mg/g at 308K and pH=6. Moreover, the adsorption efficiency and selectivity of CSAOCF for uranium were significantly improved after the introduction of the carboxymethyl group, and the selection and partition coefficient of CSAOCF for uranium and vanadium increased from 16-fold to 30-fold under the same conditions. This indicates that there is a synergistic effect between carboxyl and amidoxime groups, which can promote the adsorption of uranium by CSAOCF. Furthermore, CSAOCF exhibits good oil resistance and can be reused more than five times. Therefore, CSAOCF containing carboxymethyl and amidoxime functional groups can considerably improve the selective adsorption of uranium and has great potential in the extraction of uranium from seawater.
作者机构：
[Heng Liu] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China;[Juan Du; Baozhan Zheng] College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China;[Huiyong Wang] College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China;[Chaoqun Ma] School of Materials Science and Engineering, University of Science and Technology, Beijing, Beijing 100083, China;[Zhiqin Deng] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China<&wdkj&>College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
通讯机构：
[Chaoqun Ma] S;[Juan Du; Baozhan Zheng] C;College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China<&wdkj&>School of Materials Science and Engineering, University of Science and Technology, Beijing, Beijing 100083, China
摘要：
Electrochemical conversion of nitrate to valuable ammonia (NH3) is a green and widely used approach to NH3 synthesis that can be an attractive and complementary alternative to the Haber–Bosch process. However, due to the multi-step reactions in the nitrate reduction pathway, there are still challenges in developing efficient catalysts that can selectively guide the reaction route towards NH3. Herein, B doping is proposed as an effective strategy to enhance nitrate conversion to NH3 on the Co3O4 nanoarrays, which not only improves the electrical conductivity of Co3O4, but also lowers the energy barrier of the potential-determining step. Such B-Co3O4/TM delivers a high faradaic efficiency of 94.7% and a large NH3 yield rate of 407.3 μmol h−1 cm−2. Theoretical calculations further elucidate that the introduction of B enhances the adsorption characteristic of Co3O4 for NO3−, consequently facilitating the reduction kinetics.
期刊：
European Journal of Medicinal Chemistry,2024年263:115956 ISSN：0223-5234
通讯作者：
Mi, Pengbing;Yuan, Zhonghua;Zheng, X;Lin, YW
作者机构：
[Tan, Yan; Yuan, Zhonghua; Mi, Pengbing; Jiang, Jinhuan; Chen, Limei; Luo, Jianxiong; Zheng, Xing; Ye, Shiying; Lin, Yuqing; Zheng, X] Univ South China, Dept Pharm, Hengyang Med Sch, Hengyang 421001, Hunan, Peoples R China.;[Lang, Jia-Jia; Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Lang, Jia-Jia; Lin, Ying-Wu; Mi, Pengbing] Univ South China, Key Lab Prot Struct & Funct Univ Hunan Prov, Hengyang 421001, Hunan, Peoples R China.;[Zheng, Xing] Hunan Vocat Coll Sci & Technol, Dept Pharm, Changsha 410004, Hunan, Peoples R China.;[Lv, You] Shaanxi Univ Sci & Technol, Coll Bioresources Chem & Mat Engn, Xian 710021, Shaanxi, Peoples R China.
通讯机构：
[Yuan, ZH; Mi, PB; Lin, YW ; Zheng, X ] U;Univ South China, Dept Pharm, Hengyang Med Sch, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Human monoamine oxidase B inhibitor;Thiochromone;Thiochromone S,S-dioxide
摘要：
Developing new scaffolds for highly potent and selective inhibitors of human Monoamine Oxidase B (hMAO-B) is a crucial objective in enhancing the efficacy and safety in the clinical treatment of neurodegenerative diseases. In this study, we have identified a series of C-3 isoxazole-substituted thiochromone S,S-dioxide derivatives that exhibit strong inhibitory activity against hMAO-B. The strategy of oxidizing thiochromone to thiochromone S,S-dioxide solves the key defect of extreme insolubility observed for thiochromone analogues. In addition, the sulfone group contributes extra hydrogen(H)-bonding interactions with Tyr435, which significantly increases the activity of thiochromone S,S-dioxide derivatives against hMAO-B. Furthermore, the presence of isoxazole group provides potential H-bonding interaction and electrostatic interaction with the residue of Tyr326, while the rigid aryl ring introduces a potential steric conflict with Phe208 of hMAO-A to improve both potency and selectivity. In our investigations, several compounds (9c, 10c, 10e, 10g, 10l and 10m) demonstrate remarkable single-digit nanomolar potency. These compounds exhibit favorable cytotoxicity profiles in both differentiated SH-SY5Y and HVSMC cells, without apparent cardiotoxic effects. Moreover, compounds 10e and 10h do not lead to an increase in ROS levels in differentiated SH-SY5Y cells, further demonstrating their potential as safe and effective hMAO-B inhibitors. These findings indicate that the C-3 isoxazole substituted thiochromone S,S-dioxide analogues are potential leading compounds for the development of selective inhibitors with high potency.
摘要：
In the classical route of synthesizing of avanafil, the last step of the reaction uses EDCI and HOBT as an acid and amine binding agent. HOBT may contain residues of hydrazine, and potential mutagenic impurities containing acylhydrazide structures may be formed. The intermediate product (M6) of avanafil was synthesized by 6 steps using diethyl ethoxylmethylmalonate and S-methyl isothiourea semisulfide as starting materials. The potentially genotoxic impurity E (Imp-E) of avanafil was given by the reaction of M6 and hydrazine sulfate acid amine, yield of 20%. The single crystal of Imp-E was cultivated by solvent volatilization method, and its structure was analyzed by high resolution mass spectrometry (HRMS) and nuclear magnetic resonance spectroscopy (NMR). The Flack parameter of Imp-E was -0.03(3) by X-ray single crystal diffraction analysis, and the absolute configuration of Imp-E was determined as S configuration. The intramolecular / intermolecular hydrogen bonds of Imp-E make the molecules maintain a stable arrangement in space.
摘要：
A novel polyvinyl alcohol-carbon nanotube containing an imidazolyl ionic liquid/chitosan composite hydrogel (termed CBCS) was prepared for highly selective uranium adsorption from seawater. The results show that CBCS has good adsorption properties for uranium within the pH range of 5.0-8.0. Kinetics and thermodynamics experiments show that the theoretical maximum adsorption capacity of CBCS to U(VI) is 496.049mg/g (288K, pH=6.0), indicating a spontaneous exothermic reaction. Mechanism analysis shows that the hydroxyl group, amino group, and CN bond on the surface of CBCS directly participate in uranium adsorption and that the dense pores on the surface of CBCS play an important role in uranium adsorption. The competitive adsorption experiment shows that CBCS has excellent uranium adsorption selectivity. In addition, CBCS exhibits good reusability. After five adsorption-desorption cycles, the uranium adsorption rate of CBCS can still reach >98%. Hence, CBCS has excellent potential for uranium extraction from seawater.
摘要：
Deinococcus radiodurans (DR) exhibits strong resistance to ionizing radiation. In this study, by constructing a radiation-resistant genetically engineered strain overexpressing the Cs gene, the tolerance of the bacterium to aluminum ions was enhanced, thereby achieving the goal of microbial sustainable remediation of uranium-contaminated environments. Methods: 1. Extraction of the recombinant plasmid pRADK-Cs, transformation into DR, and verification. 2. Investigation of factors such as time and initial uranium concentration on the efficiency of uranium accumulation by the recombinant strain, characterized by changes in functional groups and surface morphology before and after accumulation using techniques such as scanning electron microscope. Conclusions: The recombinant strain Deino-Cs can reduce the inhibitory effect of aluminum ions on uranium accumulation capability, and it exhibits a higher uranium accumulation rate compared to the wild-type strain.
作者机构：
[Xinyi Zhang; Rongshuo Guo] Lab of Optoelectronic Technology for Low Dimensional Nanomaterials, School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;[Yinxiang Chen] School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China;[Yiguo Xu] Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China;[Ye Zhang] Lab of Optoelectronic Technology for Low Dimensional Nanomaterials, School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China<&wdkj&>School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China
通讯机构：
[Yinxiang Chen] S;[Ye Zhang] L;Lab of Optoelectronic Technology for Low Dimensional Nanomaterials, School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China<&wdkj&>School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China<&wdkj&>School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China
摘要：
Self-assembled nanomaterials have aroused enormous interest owing to their enhanced physicochemical properties as compared to monomers. Herein, two-dimensional Nd-based polyoxometalate clusterphene (Nd-POMCene) with a highly ordered honeycomb structure is synthesized by self-assembly, which is demonstrated with efficient photocatalytic degradation performance towards organic dyes, such as Rhodamine B (RhB), methylene blue, and crystal violet. Especially, RhB can be totally photodegraded by Nd-POMCene under the simulated sunlight within 1 h while a degraded efficiency of 97.50 % can be achieved under natural light within 2 h. As proved by the density functional theory results, the highly ordered structure of POMCene is beneficial for enhancing photocatalytic performance associated with the improved separation/transmission of photogenerated electron/hole pairs and large-scale electron delocalization. The mechanism study provides compelling evidence to demonstrate that all of holes, hydroxyl radicals, and superoxide radicals chemically account for the efficient photodegradation by Nd-POMCene. Finally, it is verified that there is much less toxicity in the degradation products of RhB.
作者机构：
[Wu, Min; Song, Zhiyin; He, H; Chen, Li; He, He; Liu, Bing; Meng, Qingtao; Ye, Fei; Dong, Jun; Lin, Jiacheng; Tang, Junhui; Zhou, Pang-Hu] Wuhan Univ, Renmin Hosp, Coll Life Sci, TaiKang Ctr Life & Med Sci,Frontier Sci Ctr Immuno, Wuhan, Hubei, Peoples R China.;[Song, Zhiyin; He, H; Chen, Li; He, He] Huazhong Univ Sci & Technol, Tongji Med Coll, Sch Basic Med, Dept Pathol, Wuhan, Hubei, Peoples R China.;[Song, Zhiyin; He, H; Chen, Li; He, He] Huazhong Univ Sci & Technol, State Key Lab Diag & Treatment Severe Zoonot Infec, Wuhan, Hubei, Peoples R China.;[Lu, Bin] Univ South China, Sch Basic Med Sci, Hengyang Med Sch, Dept Biochem & Mol Biol, Hengyang, Hunan, Peoples R China.;[Lu, Jia-Hong] Univ Macau, Inst Chinese Med Sci, State Key Lab Qual Res Chinese Med, Macau, Peoples R China.
通讯机构：
[Song, ZY; He, H ] W;Wuhan Univ, Renmin Hosp, Coll Life Sci, TaiKang Ctr Life & Med Sci,Frontier Sci Ctr Immuno, Wuhan, Hubei, Peoples R China.;Huazhong Univ Sci & Technol, Tongji Med Coll, Sch Basic Med, Dept Pathol, Wuhan, Hubei, Peoples R China.;Huazhong Univ Sci & Technol, State Key Lab Diag & Treatment Severe Zoonot Infec, Wuhan, Hubei, Peoples R China.
摘要：
Endoplasmic reticulum (ER)-mitochondria contacts are critical for the regulation of lipid transport, synthesis, and metabolism. However, the molecular mechanism and physiological function of endoplasmic reticulum-mitochondrial contacts remain unclear. Here, we show that Mic19, a key subunit of MICOS (mitochondrial contact site and cristae organizing system) complex, regulates ER-mitochondria contacts by the EMC2-SLC25A46-Mic19 axis. Mic19 liver specific knockout (LKO) leads to the reduction of ER-mitochondrial contacts, mitochondrial lipid metabolism disorder, disorganization of mitochondrial cristae and mitochondrial unfolded protein stress response in mouse hepatocytes, impairing liver mitochondrial fatty acid beta-oxidation and lipid metabolism, which may spontaneously trigger nonalcoholic steatohepatitis (NASH) and liver fibrosis in mice. Whereas, the re-expression of Mic19 in Mic19 LKO hepatocytes blocks the development of liver disease in mice. In addition, Mic19 overexpression suppresses MCD-induced fatty liver disease. Thus, our findings uncover the EMC2-SLC25A46-Mic19 axis as a pathway regulating ER-mitochondria contacts, and reveal that impairment of ER-mitochondria contacts may be a mechanism associated with the development of NASH and liver fibrosis. The molecular mechanism and physiological function of endoplasmic reticulum-mitochondrial contacts remain unclear. Here, authors uncover a role for the EMC2- SLC25A46-Mic19 axis in mitochondrial lipid metabolism and liver disease
期刊：
Computational and Structural Biotechnology Journal,2024年23:77-86 ISSN：2001-0370
通讯作者：
Zhang, Jian;Zhu, J;Li, CQ
作者机构：
[Zhang, Jian; Gao, Yu; Zhao, Jun; Zhu, Jiang; Zhang, J] Harbin Med Univ, Sch Med Informat, Daqing Campus, Daqing 163319, Peoples R China.;[Wang, Qiuyu; Li, Chunquan; Song, Chao] Univ South China, Affiliated Hosp 1, Hengyang Med Sch, Cardiovasc Lab Big Data & Imaging Artificial Intel, Hengyang 421001, Hunan, Peoples R China.;[Feng, Chenchen; Wang, Qiuyu; Song, Chao; Yin, Mingxue; Li, Chunquan] Univ South China, Sch Comp, Hengyang 421001, Hunan, Peoples R China.;[Wang, Qiuyu; Song, Chao; Yin, Mingxue; Li, Chunquan] Univ South China, Hunan Prov Key Lab Multiomics&Artificial Intellige, Hengyang 421001, Hunan, Peoples R China.;[Wang, Qiuyu; Yin, Mingxue; Li, Chunquan] Univ South China, Sch Basic Med Sci, Hengyang Med Sch, Dept Biochem & Mol Biol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Li, CQ ] U;[Zhang, J; Zhu, J ] H;Harbin Med Univ, Sch Med Informat, Daqing Campus, Daqing 163319, Peoples R China.;Univ South China, Affiliated Hosp 1, Hengyang Med Sch, Cardiovasc Lab Big Data & Imaging Artificial Intel, Hengyang 421001, Hunan, Peoples R China.
关键词：
Single cell integration database;Cell heterogeneity;Multi-method automatic cell-type annotation;Cell to cell communication
摘要：
Single-cell RNA sequencing (scRNA-seq), which profiles gene expression at the cellular level, has effectively explored cell heterogeneity and reconstructed developmental trajectories. With the increasing research on diseases and biological processes, scRNA-seq datasets are accumulating rapidly, highlighting the urgent need for collecting and processing these data to support comprehensive and effective annotation and analysis. Here, we have developed a comprehensive Single -Cell transcriptome integration database for human and mouse (SCInter, https://bio.liclab.net/SCInter/index.php), which aims to provide a manually curated database that supports the provision of gene expression profiles across various cell types at the sample level. The current version of SCInter includes 115 integrated datasets and 1016 samples, covering nearly 150 tissues/cell lines. It contains 8016,646 cell markers in 457 identified cell types. SCInter enabled comprehensive analysis of cataloged single-cell data encompassing quality control (QC), clustering, cell markers, multi-method cell type automatic annotation, predicting cell differentiation trajectories and so on. At the same time, SCInter provided a user-friendly interface to query, browse, analyze and visualize each integrated dataset and single cell sample, along with comprehensive QC reports and processing results. It will facilitate the identification of cell type in different cell subpopulations and explore developmental trajectories, enhancing the study of cell heterogeneity in the fields of immunology and oncology.
摘要：
Laccase-catalyzed oxidative reactions are increasingly examined as a reliable approach to environmental analysis and remediation, and it is urgent to widen metal category to compensate huge gap in the number of studies on copper- and non-copper laccase mimics. Herein, two-dimensional ultrathin MnO2 nanofilm (Mn-uNF) was designed via a chemical deposition and alkali etching process. Similar to Cu-laccase, Mn-uNF can oxidize phenols via a one-electron-transfer reaction of Mn(III) and accelerate the MnIII/MnIV state cycle through an unconventional oxygen reduction process. The excellent laccase-like performance of Mn-uNF can be ascribed to the abundant atomically dispersed Vo-assisted Mn(III) and surface -OH species, which was confirmed by characterizations and DFT calculation. Further, a facile dual-function colorimetric platform was designed for array sensing of o-, m-, and p-dihydroxybenzene isomers and one-step discrimination of tetracyclines containing phenol groups. These findings provide reasonable guidance for the design of a nanozyme with active Mn sites as a new family member of highly efficient copper-free laccase mimics.
