306 results on '"Hua Peng"'
Search Results
2. Study on Deformation Control of Road-Deep Foundation Pit Passing under Elevated Subway Bridge
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Hua Peng, Bowen Meng, Sui Tan, Li Zhu, and Guan Wang
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road-deep foundation pit ,pile underpinning ,foundation pit construction ,viaduct ,monitoring data ,numerical simulation ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
This paper focuses on the application of pile foundation underpinning technology in a deep foundation pit of a subway Viaduct Project in Beijing. The study aims to address the engineering characteristics of the project, including a large number of new piles, a wide span of underpinning abutment, a long length of deep foundation pit, and a wide range of influences. This research utilizes field monitoring and numerical simulation methods to investigate the pile foundation underpinnings. The impact and management of road-deep foundation pit construction are considered, as well as their combined effect on subway viaducts and track structures. The primary accomplishments are as follows: (1) By analyzing the data from on-site deformation monitoring, it is evident that the pier exhibits maximum vertical deformation and maximum transverse deformation at the same location. The measuring locations are specifically situated on Pier 7# at the pile foundation underpinning. The maximum vertical and transverse deformations of the track are directly proportional to the maximum deformation of the pier. (2) By comparing the numerical simulation results with the field monitoring data, it is observed that although there is some discrepancy between the two, the deformation trend is largely consistent. This suggests that the numerical simulation analysis method is effective in reflecting the deformation of the bridge and track. (3) Through the numerical model and changing the values of the retaining structure parameters, the sensitivity of the pier deformation near the road foundation pit to the retaining structure parameters is systematically analyzed. The sensitivity of the pier deformation to the foundation pit parameters is as follows: the embedded depth insertion ratio of the retaining pile > the diameter of the retaining pile > the pile spacing.
- Published
- 2024
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3. Deformation Control of the Existing Medium-Low-Speed Maglev Metro Viaduct over a Double-Line Bored Tunnel
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Hua Peng, Zikai Wu, Xv Peng, Xiaoqi Xiao, and Zichen Li
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double-line subway-bored tunnel ,Maglev metro ,under-traversed bridge ,deformation control index ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Taking a double-line underground excavation subway tunnel underneath the medium-low-speed Maglev bridge section of the Beijing S1 Metro line as a project reference, the deformation control index of the Maglev metro bridge and track panel was studied using numerical simulation and data monitoring, under the conditions of deep-hole grouting measures for the soil layer around the excavation tunnel and active lifting for the superstructure of the viaduct. The results of the numerical simulation show that the maximum deformation value of the pier is −1.73 mm and the maximum vertical deformation value of the Maglev rail track is −1.56 mm. Monitoring shows that the maximum vertical deformation value of the magnetic levitation rail is −1.25 mm and the deformation is within the allowable range. Both numerical simulation and field monitoring results reflect the deformation trend of existing structures; the deep-hole grouting measures taken to strengthen the soil layer around the tunnel and the upper structure of the active roof elevation frame can effectively control the deformation of the existing structure. The study can provide guidance and reference for similar projects.
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- 2023
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4. Deformation Control of Subway Stations under the Influence of the Construction of Deep and Large Foundation Pits with Composite Support Systems
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Hua Peng, Qingchen Tang, Li Zhu, Zichen Li, Haiyang Li, and Guangming Wang
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composite support ,deep and large foundation pit ,neighboring subway station ,field monitoring ,numerical simulation ,deformation control ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The excavation depth of a deep and large foundation pit of a composite support system is 25.5 m, the minimum clear distance from the main structure of the station is 10.6 m and the closest distance to the entrance and exit structure is only 3.6 m. Relying on this project, numerical simulation, field monitoring and other methods are used to study the deformation law of the self-supporting system, the ground settlement and the subway station under construction. Then, the influence of different support parameters on the deformation of the subway station and track is analyzed, and the internal relationship between the deformation value of the station and track and the support parameters is further discussed. The main work and achievements are as follows: (1) Through field measurement and analysis, the deformation history of the station and track in the excavation is studied. The obtained results show that the interbracing + pile–anchor composite support structure has better control over the deformation of adjacent stations and tracks. Comparing the simulated value of station and track deformation with the measured data, it is concluded that the simulated and measured deformation trends remain consistent, and the maximum deformation value corresponds to the middle position of the foundation pit. This confirms the rationality and reliability of the composite support system model. (2) The analysis of the influence of different support parameters on the maximum deformation value of the subway station and track shows that the deformation of the station and track is less affected by the pile diameter of the retaining pile and the size of the interbracing section. It is greatly affected by the embedding depth of the retaining pile and the number of support channels. It is suggested that the optimal parameters should be a pile diameter of 1.0 m, embedding depth of 8 m, four interbracings and an interbracing section of 1.0 m × 1.0 m.
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- 2022
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5. Field Measurement Analysis and Control Measures Evaluation of Metro Vehicle Noise Caused by Rail Corrugation
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Hua Peng, Yufei Yao, Xiaopei Cai, Yanglong Zhong, and Tianchi Sun
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metro vehicle ,interior noise ,rail corrugation ,wheel–rail noise ,frequency domain analysis ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The noise caused by rail corrugation seriously affects the operation quality of metro vehicles. In this work, the rail corrugation, interior noise and wheel–rail noise of a metro line were tested, and the test results were compared with those after two kinds of treatments. The results show that rail corrugation is the main cause of the abnormal interior noise. The interior noise in many sections exceeds the limit, where clear rail corrugations from 31.5~63 mm are found. When the train passes through the rail corrugation section, the interior noise shows a clear increase, and the maximum increase is higher than 25 dB(A). After increasing the lateral stiffness of the track and rail grinding, the interior noise is reduced by 11.4 dB(A). After a long renovation time, the interior noise is effectively equal to that when the renovation was completed. The research results of this work can provide a reference for rail corrugation treatment and noise control.
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- 2021
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6. Reliability Modeling and Evaluation Method of CNC Grinding Machine Tool
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Yongjun Liu, Hua Peng, and Yong Yang
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reliability modeling ,reliability optimization ,reliability evaluation ,Monte Carlo simulation ,CNC grinding machine tool ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
How to determine subsystem’s reliability and evaluate the whole machine’s reliability of the CNC (computer numerical control) grinding machine tool is important for reliability design and promotion. Each subsystem was modeled by a different distribution based on collected data and the models were optimized by the modified gray correlation degree, which was called the similar slope and close median gray correlation method. Methods of generating random data were proposed for different models. The reliability evaluation algorithm based on Monte Carlo simulation was studied and the whole machine’s reliability of the CNC grinder was evaluated by the algorithm. The evaluation result by the Monte Carlo algorithm was compared using the observed value and the evaluation value by the whole fitting method. The results show that the point estimation value evaluated by the algorithm based on Monte Carlo has high accuracy. The interval estimation by the Monte Carlo method was 20.2% and 38.1% by the observed value and the whole fitting value, respectively, which has more practical engineering significance. The reliability evaluation method can be used to assess the whole CNC grinding machine’s reliability in reliability design, and is also one reference for reliability evaluation of other electromechanical equipment.
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- 2018
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7. Development of 16 Microsatellite Markers for Prince’s Pine, Chimaphila japonica (Pyroleae, Monotropoideae, Ericaceae)
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Junbo Yang, Hua Peng, Jing Zhou, Zhenwen Liu, and Qianru Zhao
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Chimaphila japonica ,microsatellite marker ,polymorphism ,population genetics ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
The perennial evergreen herb, Chimaphila japonica is found exclusively in East Asian temperate coniferous or sometimes in deciduous forests. By using the Fast Isolation by Amplified Fragment Length Polymorphism (AFLP) of Sequences Containing repeats (FIASCO) protocol, 20 microsatellite primer sets were identified in two wild populations. Of these primers, 16 displayed polymorphisms and 4 were monomorphic. The number of alleles per locus ranged from one to six among populations, values for expected and observed heterozygosities ranged from 0.000 to 0.848 and from 0.000 to 1.000, respectively. The new SSR markers will be useful in obtaining estimates of population-level genetic diversity and in phylogeographic studies of C. japonica.
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- 2012
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8. Mechanical and Hydraulic Behaviors of Eco-Friendly Pervious Concrete Incorporating Fly Ash and Blast Furnace Slag
- Author
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Hua Peng, Jian Yin, and Weimin Song
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pervious concrete ,fly ash ,blast furnace slag ,hydraulic properties ,compressive strength ,porosity ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Eco-friendly pervious concretes containing fly ash (FA) and blast furnace slag (BFS) were prepared in this study. The compressive strength and hydraulic behaviors were investigated to explore the effect of replacement content of FA and BFS. Rheological tests of cementitious pastes were first conducted and the results showed that FA could increase the apparent viscosity and BFS did not change the rheology performance. Compared to traditional concretes, FA and BFS both decreased the compressive strength of pervious concrete at 28 d, while pervious concrete incorporated with FA and/or BFS presented comparable strength at 60 d. Compared to the control concrete mix, at the same replacement rate, FA changed the compressive strength more obviously than BFS. FA and BFS both decreased the effective porosity and permeability coefficient of pervious concrete. However, when the replacement rate (30%) was the same, concretes with ternary blends presented obviously larger porosity than binary blends. The relationships between porosity and permeability, and strength were also established.
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- 2018
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9. Synthesis of Functionalized 4,1‐Benzothiazepines via a [4+3] Annulation between Aza‐ o‐ Quinone Methides and Pyridinium 1,4‐Zwitterionic Thiolates
- Author
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Hua-Peng Cui, Ya-Jing Chen, Xin-Lu Wang, Juntao Liu, Chuanchuan Wang, Zhi-Wei Ma, Degang Ding, Xue-Hua Liu, and Lei Meng
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chemistry.chemical_compound ,Annulation ,chemistry ,General Chemistry ,Pyridinium ,O quinones ,Medicinal chemistry - Published
- 2021
10. Sijunzi Decoction Inhibits Stemness by Suppressing β-Catenin Transcriptional Activity in Gastric Cancer Cells
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Ping Tang, Hong Wang, Yue-Jun Li, Qing-Hua Peng, Lin-Li Liao, and Pei Liu
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biology ,Cell growth ,Chemistry ,CD44 ,DNA ,General Medicine ,Molecular biology ,Complementary and alternative medicine ,Stomach Neoplasms ,Cell culture ,Cancer stem cell ,Apoptosis ,Cell Line, Tumor ,Cancer cell ,Neoplastic Stem Cells ,biology.protein ,Humans ,Pharmacology (medical) ,Viability assay ,Stem cell ,beta Catenin ,Drugs, Chinese Herbal - Abstract
OBJECTIVE To investigate a previously uncharacterized function of Sijunzi Decoction (SJZD) in inhibition of gastric cancer stem cells (GCSCs). METHODS MKN74 and MKN45, two CD44 positive gastric cancer cell lines with stem cell properties were used. The cells were divided into 2 groups. Treatment group was treated with SJZD (1-5 mg/mL) for indicated time (48 h-14 days). The control group was treated with equal volume of phosphate buffered saline. Cell Counting Assay Kit-8 were used to measure cell viability. Spheroid colony formation and GCSCs marker expression were performed to determine GCSCs stemness. Cell fractionation and chromatin immunoprecipitation assays were used to assess the distribution and DNA-binding activity of β-catenin after SJZD treatment, respectively. RESULTS SJZD treatment repressed cell growth and induced apoptosis in MKN74 and MKN45 cell lines (P
- Published
- 2021
11. Anti-inflammatory and antioxidant activities of chemical constituents from the flower buds of Buddleja officinalis
- Author
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Bin Li, Nusrat Hussain, Xu-Dong Zhou, Wei Wang, Caiyun Peng, Qing-hua Peng, Qingling Xie, Bin Liu, Na Liang, Sheng-Huang Chen, Muhammad Ismail, Yuqing Jian, Huanghe Yu, and Feibing Huang
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chemistry.chemical_classification ,Antioxidant ,Vitamin C ,Traditional medicine ,biology ,medicine.drug_class ,Scrophulariaceae ,Chemistry ,medicine.medical_treatment ,Organic Chemistry ,Glycoside ,Plant Science ,biology.organism_classification ,Biochemistry ,Anti-inflammatory ,Analytical Chemistry ,medicine ,Potency ,Buddleja officinalis ,IC50 - Abstract
Five new glycosides including mimenghuasu A and B (1-2), isolinarin (3), cyclocitralosides A and B (4-5), along with forty-seven known compounds were isolated from the flower buds of Buddleja officinalis. These structures were elucidated by extensive spectroscopic analysis (UV, IR, 1 D, 2 D NMR, and MS spectra). The anti-inflammatory activities of the isolated compounds were determined by enzyme-linked immunosorbent assay (ELISA) on the expression of TNF-α (LPS-activated RAW264.7 cells) and MTT experiment on LPS-induced HUVECs proliferation effects. Good suppressive effects on the expression of TNF-α were shown by 4 and 5 with IC50 values of 19.35 and 22.10 μM, respectively, compared to positive control indomethacin (IC50 16.40 μM). In addition to this, some isolated compounds exhibited excellent antioxidant activities including compounds 16, 18, 29, 39, and 47 (IC50 μM: 82.59, 72.94, 33.65, 46.67, and 20.81, respectively) with almost the same or stronger potency with reference to vitamin C as positive control (IC50 81.83 μM).
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- 2021
12. Longitudinal single-cell RNA-seq of hESCs-derived retinal organoids
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Xiaoliang Liang, Guang-Hua Peng, Sergio Poli, and Shaojun Wang
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0301 basic medicine ,education.field_of_study ,Retina ,Cell type ,Retinal pigment epithelium ,Population ,Retinal ,Biology ,Embryonic stem cell ,General Biochemistry, Genetics and Molecular Biology ,Photoreceptor cell ,Cell biology ,Transcriptome ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,0302 clinical medicine ,medicine.anatomical_structure ,chemistry ,030220 oncology & carcinogenesis ,medicine ,General Agricultural and Biological Sciences ,education ,General Environmental Science - Abstract
Human retina development involves multiple well-studied signaling pathways that promote the genesis of a wide arrange of different cell types in a complex architectural structure. Human embryonic stem cells (hESCs)-derived retinal organoids could recapitulate the human retinal development. We performed single-cell RNA-seq of retinal organoids from 5 time points (D36, D66, D96, D126, D186) and identified 9 distinct populations of cells. In addition, we analyzed the molecular characteristics of each main population and followed them from genesis to maturity by pseudotime analysis and characterized the cell-cell interactions between different cell types. Interestingly, we identified insulin receptor (INSR) as a specifically expressed receptor involved in the genesis of photoreceptors, and pleiothropin (PTN)-protein tyrosine phosphatase receptor type Z1 (PTPRZ1) as a mediator of a previously unknown interaction between Muller and retinal progenitor cells. Taken together, these findings provide a rich transcriptome-based lineage map for studying human retinal development and modeling developmental disorders in retinal organoids.
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- 2021
13. When phosphoryl azide meets mechanochemistry: clean, rapid, and efficient synthesis of phosphoryl amides under B(C6F5)3 catalysis in a ball mill
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Xin-Hua Peng, Zhuo Li, Ze-Lin Wang, Lin-Yu Jiao, and Nan Jia
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chemistry.chemical_compound ,chemistry ,Nucleophile ,Mechanochemistry ,Reagent ,Phosphorus ,chemistry.chemical_element ,Azide ,Combinatorial chemistry ,Ball mill ,Catalysis - Abstract
We described herein the first example associated with B(C6F5)3-catalyzed preparation of phosphoryl amides under mechanochemical conditions. In this novel system, the combination of energetic reagents with an energetic mechanochemical process enabled the reaction to proceed under very mild conditions and accelerated the desired nucleophilic attack on the phosphorus center.
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- 2021
14. Characterisation, expression and functional analysis of PAL gene family in Cephalotaxus hainanensis
- Author
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Hua-peng Sun, Fei Qiao, Cong Hanqing, Xiao-hong Zhong, Jiang Xuefei, and He Yuedong
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0106 biological sciences ,0301 basic medicine ,Physiology ,Cephalotaxus hainanensis ,Plant Science ,Phenylalanine ammonia-lyase ,01 natural sciences ,Cinnamic acid ,Cephalotaxus ,03 medical and health sciences ,chemistry.chemical_compound ,Alkaloids ,Biosynthesis ,Tandem Mass Spectrometry ,Genetics ,Gene family ,Gene ,Phenylalanine Ammonia-Lyase ,Plant Proteins ,chemistry.chemical_classification ,biology ,Chemistry ,biology.organism_classification ,Recombinant Proteins ,humanities ,030104 developmental biology ,Enzyme ,Biochemistry ,Multigene Family ,Chromatography, Liquid ,010606 plant biology & botany - Abstract
Phenylalanine ammonia lyase (PAL) is the first committed step in the formation of phenylpropanoids, and catalyses the deamination of L-phenylalanine (L-Phe) to yield cinnamic acid. While PALs are common in plants, PAL genes involved in alkaloid biosynthesis in Cephalotaxus hainanensis have never been described. To obtain better knowledge of PAL genes and their number and function involved in Cephalotaxus alkaloid biosynthesis four PAL genes were screened and cloned. In vitro enzymatic analysis showed that all four PAL recombinant proteins could convert L-Phe to product trans-cinnamic acid, and showed strict substrate specificity. Moreover, the expression profiles of four ChPALs were analysed using qRT-PCR, which showed that they had higher transcript levels in roots and stems, and that different ChPALs displayed different response sensitivities and change patterns in response to stimuli. Several metabolic compounds were measured in stimulated leaves using UPLC-MS, and indicating the concentration of Cephalotaxus alkaloids and cinnamic acid in leaves subjected to different conditions. These concentrations increased significantly after treatment with 100 mM NaCl, 100 mM mannitol, 100 μM SA and 10 μM ABA. The expression levels of four PAL genes showed indications of upregulation after treatment. These results supply an important foundation for further research on candidate genes involved in the biosynthesis of Cephalotaxus alkaloids.
- Published
- 2020
15. PD-L1 on dendritic cells attenuates T cell activation and regulates response to immune checkpoint blockade
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Yang Xin Fu, Qi Peng, Hua Peng, Jingya Guo, Mingyi Chen, Zihan Zhang, Yuan-Yuan Zhang, Silin Zhang, Haidong Tang, Yong Liang, and Xiangyan Qiu
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0301 basic medicine ,Male ,General Physics and Astronomy ,Cancer immunotherapy ,Lymphocyte Activation ,B7-H1 Antigen ,Mice ,0302 clinical medicine ,Tumor Microenvironment ,Cytotoxic T cell ,lcsh:Science ,Mice, Knockout ,Multidisciplinary ,biology ,Chemistry ,Up-Regulation ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Tumour immunology ,Female ,Cancer microenvironment ,T cell ,Science ,General Biochemistry, Genetics and Molecular Biology ,Article ,03 medical and health sciences ,Interferon-gamma ,Immune system ,Lymphocytes, Tumor-Infiltrating ,Antigen ,Downregulation and upregulation ,Antigens, Neoplasm ,PD-L1 ,Cell Line, Tumor ,medicine ,Animals ,Humans ,Antigen-presenting cell ,General Chemistry ,Dendritic Cells ,Immune checkpoint ,Mice, Inbred C57BL ,Disease Models, Animal ,030104 developmental biology ,HEK293 Cells ,Cancer research ,biology.protein ,lcsh:Q ,T-Lymphocytes, Cytotoxic - Abstract
Immune checkpoint blockade therapies have shown clinical promise in a variety of cancers, but how tumor-infiltrating T cells are activated remains unclear. In this study, we explore the functions of PD-L1 on dendritic cells (DCs), which highly express PD-L1. We observe that PD-L1 on DC plays a critical role in limiting T cell responses. Type 1 conventional DCs are essential for PD-L1 blockade and they upregulate PD-L1 upon antigen uptake. Upregulation of PD-L1 on DC is mediated by type II interferon. While DCs are the major antigen presenting cells for cross-presenting tumor antigens to T cells, subsequent PD-L1 upregulation protects them from killing by cytotoxic T lymphocytes, yet dampens the antitumor responses. Blocking PD-L1 in established tumors promotes re-activation of tumor-infiltrating T cells for tumor control. Our study identifies a critical and dynamic role of PD-L1 on DC, which needs to be harnessed for better invigoration of antitumor immune responses., The role of PD-L1 expression on tumor-infiltrating immune cells in promoting tumor immune escape is not fully understood. Here, the authors show that PD-L1 expression by dendritic cells plays a crucial role in hindering anti-tumor T cell responses and is essential for the therapeutic efficacy of PD-L1 blockade.
- Published
- 2020
16. Highly stable La0.5Sr0.5Fe0.9Mo0.1O3-δ electrode for reversible symmetric solid oxide cells
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Liuzhen Bian, Shengli An, Shuting Li, Xiaowei Li, Lili Guan, Changyang Liu, Xiwen Song, Ji Hua Peng, Jun Peng, and Liu Yuanyuan
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Electrolysis ,Materials science ,Renewable Energy, Sustainability and the Environment ,Oxide ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,Fuel Technology ,chemistry ,Chemical engineering ,Molybdenum ,law ,Electrode ,0210 nano-technology ,Polarization (electrochemistry) - Abstract
Reversible solid oxide cells (RSOCs) using identical material as both fuel electrode and air electrode have received extensive attentions due to their simplified fabrication process, increased compatibility between electrolyte and electrode. In this work, Molybdenum doped La0.5Sr0.5Fe0.9Mo0.1O3-δ (LSFMo) symmetric electrode based on RSOCs is firstly designed and synthesized via sol-gel method. The effect of Molybdenum substitution at Fe-site on crystal structure, chemical stability, conductivity and electrochemical performance of La0.5Sr0.5FeO3-δ oxide is thoroughly investigated. The structural stability of La0.5Sr0.5FeO3-δ (LSF) in reducing condition is significantly enhanced after the incorporation of Mo5+/6+ and the conductivity in 5% H2 for LSFMo is ~7 times higher than that of undoped LSF. In addition, the polarization resistance value at 850 °C based on LSFMo/LSGM/LSFMo is 0.08 and 0.09 Ω cm2 in air and wet H2, respectively. At 850 °C and 20%H2O–H2, a peak power density of 640 mW cm−2 is obtained in fuel cell mode, while a current density of −1000 mA cm−2 is attained at 1.3 V in electrolysis mode. Finally, the symmetric cell exhibits an excellent cycling reversible operation in both SOFCs mode and SOECs mode without detectable degradation.
- Published
- 2020
17. Experimental Study on Improvement Mechanism of Silane Emulsion on Acid Rain Corrosion of Green Ecological Concrete
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Hua Peng, Yao Zhuang Li, and Wei Xun Hu
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chemistry.chemical_compound ,Materials science ,Chemical engineering ,chemistry ,Emulsion ,General Materials Science ,Acid rain ,Silane ,Mechanism (sociology) ,Corrosion - Abstract
Concrete structure is vulnerable to acid rain corrosion, which affects the service life of the material, in the corrosive environment, and concrete structure will deteriorate because of the erosion of water/chloride ions. Therefore, waterproof treatment of concrete structure is needed to improve the durability of the structure. In this study, the green ecological concrete is taken as the research object. The concrete is mixed with a certain amount of silane emulsion to reduce the probability of corrosion of concrete due to moisture and chloride ions, thereby prolonging the service life of this kind of concrete. During the experiment, in order to further test the corrosion resistance of silane emulsion to this kind of concrete, different kinds of concrete were taken as test objects and divided into 3 test groups, namely, the original test group (ITE), the non silane emulsion test group (TWSE) and the optimal ratio test group (OT-SE). It is proved by experiments that the best proportion of concrete mixed with silane emulsion is 0.32 of water binder ratio, 18% of coal powder mixing ratio, 37% of gravel mixing ratio and 0.23% of proportion of silane emulsion. The above factors are applied to compressive strength test, and 30 days as test time, the compressive strength of concrete with fly ash is measured. In the experiment of anticorrosion, compared with the traditional concrete samples, the electrical flux of concrete mixed with silane emulsion decreased by 28.7% in 8 h, that is, chloride ion permeability decreased significantly.
- Published
- 2020
18. Iridium-catalyzed ortho-selective carbon–hydrogen amidation of benzamides with sulfonyl azides in ionic liquid
- Author
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Huiyong Chen, Ming Sun, Shanshan Liu, Zhuo Li, Hong Qian, Xin-Hua Peng, Xiao-Mei Yin, Xiaoxun Ma, Lin-Yu Jiao, and Zihui Ning
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Sulfonyl ,chemistry.chemical_classification ,Hydrogen ,General Chemical Engineering ,chemistry.chemical_element ,General Chemistry ,Combinatorial chemistry ,Catalysis ,chemistry.chemical_compound ,chemistry ,Functional group ,Ionic liquid ,Iridium ,Carbon ,Open air - Abstract
An efficient and convenient iridium(III) catalyzed ortho-C–H bond amidation of weakly coordinating benzamides treated with readily available sulfonyl azides as the amino source has been described. In this transformation, ionic liquids represents an ideal reaction medium, giving rise to a broad range of amidation products under mild conditions in the open air. This protocol offers moderate to excellent chemical yields, exclusive regioselectivities, and good functional group tolerance.
- Published
- 2020
19. Outer membrane vesicles derived fromE. colias novel vehicles for transdermal and tumor targeting delivery
- Author
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Mao-Ze Wang, Ting-Wei Gu, Jie Niu, Yang Chu, Ke-Ran Guo, and Li-Hua Peng
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Peptide ,02 engineering and technology ,Pharmacology ,Administration, Cutaneous ,medicine.disease_cause ,03 medical and health sciences ,Drug Delivery Systems ,Neoplasms ,Escherichia coli ,medicine ,Stratum corneum ,Humans ,General Materials Science ,Skin ,030304 developmental biology ,Transdermal ,chemistry.chemical_classification ,0303 health sciences ,Melanoma ,Vesicle ,021001 nanoscience & nanotechnology ,medicine.disease ,medicine.anatomical_structure ,chemistry ,Drug delivery ,0210 nano-technology ,Bacterial outer membrane - Abstract
Transdermal drug delivery is favored in clinical therapy because of its ability to overcome the shortcomings of the first pass elimination of the liver caused by traditional oral administration and the irreversibility of the injection. However, skin stratum corneum (SC) forms a big barrier that precludes most of the biomacromolecules. Herein, we propose the engineering of transformed Escherichia coli (E. coli) derived outer membrane vesicles, detoxified by lysozymes (named TEVs) as the carrier for transdermal drug delivery. TEVs were derived from transgenic E. coli and then modified by an integrin alpha(v)beta(3) (αvβ3) targeting peptide and co-loaded with indocyanine green (ICG) (P-TEVs-G). TEVs were shown to have excellence in penetrating through intact SC without any additional enhancement, followed by targeting of melanoma cells. TEVs are promising nanoplatforms for transdermal and tumor targeting drug delivery with high efficacy and biosafety, possessing great potential in the treatment of superficial tumors.
- Published
- 2020
20. The BACE1-Specific DNA Aptamer A1 Rescues Amyloid-β Pathology and Behavioral Deficits in a Mouse Model of Alzheimer's Disease
- Author
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Yong-Hua Peng, Yanling Liang, Xingmei Zhang, Shuji Li, Zhi-Man Liang, Yue Chen, Hong-Jie Luo, Ying-Hong Tian, Li-Li Long, Yusheng Shi, and Ya-Jun Chen
- Subjects
0301 basic medicine ,Aptamer ,Mice, Transgenic ,Cleavage (embryo) ,Biochemistry ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Western blot ,Alzheimer Disease ,mental disorders ,Drug Discovery ,Genetics ,Amyloid precursor protein ,medicine ,Animals ,Aspartic Acid Endopeptidases ,Humans ,Senile plaques ,Molecular Biology ,chemistry.chemical_classification ,Amyloid beta-Peptides ,biology ,medicine.diagnostic_test ,Chemistry ,Brain ,Genetic Therapy ,Aptamers, Nucleotide ,Molecular biology ,Disease Models, Animal ,Infusions, Intraventricular ,030104 developmental biology ,Enzyme ,030220 oncology & carcinogenesis ,biology.protein ,Molecular Medicine ,Amyloid Precursor Protein Secretases ,DNA ,Systematic evolution of ligands by exponential enrichment - Abstract
Amyloid-β (Aβ) plaque deposits in the brain are considered to be one of the main pathological markers of Alzheimer's disease (AD). The sequential proteolytic cleavage of amyloid precursor protein (APP) by the aspartyl proteases β-site APP-cleaving enzyme 1 (BACE1) and γ-secretase produces Aβ. Therefore, BACE1 inhibition is a very attractive target for the treatment of AD. Our previous work identified a DNA aptamer named A1 that can bind to BACE1 with high affinity and specificity and exhibits a distinct inhibitory effect on BACE1 activity in an AD cell model. The purpose of this research was to test the effect of aptamer A1 in Tg6799 mice. Four-month-old Tg6799 mice were randomly divided into two groups and treated with aptamer A1 and ineffective aptamer A1scr, respectively, by intracerebroventricular injection. Subsequent behavioral experiments showed that treatment with the aptamer A1 improved the cognitive abilities of the AD mice. Western blot indicated that BACE1 and soluble amyloid precursor protein β (sAPPβ) expression significantly decreased in the A1-treated mice. Moreover, aptamer A1 reduced the content of Aβ42 and the number and density of senile plaques in AD mice. Therefore, our results indicate that aptamer A1 is a novel specific and potent BACE1 inhibitor and is a promising potential target for the treatment of AD.
- Published
- 2019
21. Histamine H4 receptor regulates IL-6 and INF-γ secretion in native monocytes from healthy subjects and patients with allergic rhinitis
- Author
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Tian Ying Li, Jian Wang, Cheng Zhi Huang, Li Yue Li, Hua Peng, Jie Cheng, Chun-Wei Li, and Xiao Yan Ye
- Subjects
Pulmonary and Respiratory Medicine ,Allergy ,T cell ,Immunology ,Native human monocyte ,Histamine H1 receptor ,Allergic rhinitis ,Allergic inflammation ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,medicine ,Th1 and Th2 cytokines ,Immunology and Allergy ,Histamine H4 receptor ,Letter to the Editor ,030304 developmental biology ,House dust mite ,0303 health sciences ,biology ,business.industry ,Monocyte ,RC581-607 ,medicine.disease ,biology.organism_classification ,medicine.anatomical_structure ,chemistry ,030220 oncology & carcinogenesis ,Immunologic diseases. Allergy ,business ,Histamine - Abstract
Histamine H1 receptor (H1R) and histamine H4 receptor (H4R) are essential in allergic inflammation. The roles of H4R have been characterized in T cell subsets, whereas the functional properties of H4R in monocytes remain unclear. In the current study, the responses of H4R in peripheral monocytes from patients with allergic rhinitis (AR) were investigated. The results confirmed that H4R has the functional effects of mediating cytokine production (i.e., down-regulating IFN-γ and up-regulating IL-6) in cells from a monocyte cell line following challenge with histamine. We demonstrated that when monocytes from AR patients were stimulated with allergen extracts of house dust mite (HDM), IFN-γ secretion was dependent on H4R activity, but IL-6 secretion was based on H1R activity. Furthermore, a combination of H1R and H4R antagonists was more effective at blocking the inflammatory response in monocytes than treatment with either type of antagonist alone.
- Published
- 2019
22. The crude ethanol extract of Periplaneta americana L. stimulates wound healing in vitro & in vivo
- Author
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Long-Jian Li, Tie-Jun Yuan, Jian Hou, Chui-Liang Yu, Li-Hua Peng, Xue-Han Xu, Haseeb Anwar Dad, and Mao-Ze Wang
- Subjects
Angiogenesis ,Wound healing ,Pharmacology ,Crude ethanol extract ,03 medical and health sciences ,0302 clinical medicine ,In vivo ,Periplaneta americana L ,Secretion ,In vitro & in vivo ,030304 developmental biology ,0303 health sciences ,biology ,integumentary system ,Chemistry ,Research ,Regeneration (biology) ,Chemotaxis ,lcsh:Other systems of medicine ,biology.organism_classification ,lcsh:RZ201-999 ,In vitro ,Complementary and alternative medicine ,030220 oncology & carcinogenesis ,Periplaneta - Abstract
Periplaneta americana L. is a Traditional Chinese Medicine that has been used in clinic treatment of various diseases for a long history. However, the therapeutic potential and the underlying mechanism of Periplaneta americana L. in the skin wound therapy was not investigated comprehensively yet. This study aims to investigate the influence of the crude ethanol extract of PAL in the different wound stages including: (1) the migration and chemotaxis to skin cells in the first stage; (2) proliferation and cells cycle of skin cells in the second stage; (3) remodeling effect and secretion of growth factors, collagens in the third stage; (4) as well as the influence in the blood vessels regeneration in the late stage. The crude ethanol extract of PAL was shown to (1) promote the keratinocytes proliferation and regulate the cells cycle of fibroblasts significantly; (2) stimulate the migration of keratinocytes and fibroblasts obviously; (3) enhance the EGF and VEGF secretion both in vitro & in vivo; (4) accelerate the wound healing, collagen synthesis and angiogenesis. The crude ethanol extract of KFX was shown a promising therapeutic agent for the wound therapy with great efficacy to accelerate the wound healing with improved quality.
- Published
- 2019
23. Optogenetic stimulation inhibits the self-renewal of mouse embryonic stem cells
- Author
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Guang-Hua Peng, Shaojun Wang, and Lu Du
- Subjects
0301 basic medicine ,MAPK/ERK pathway ,lcsh:Biotechnology ,Proliferation ,Stimulation ,Regenerative medicine ,General Biochemistry, Genetics and Molecular Biology ,lcsh:Biochemistry ,03 medical and health sciences ,0302 clinical medicine ,lcsh:TP248.13-248.65 ,lcsh:QD415-436 ,lcsh:QH301-705.5 ,Mouse embryonic stem cell ,Chemistry ,Research ,Depolarization ,Cell cycle ,Embryonic stem cell ,Cell biology ,030104 developmental biology ,lcsh:Biology (General) ,030220 oncology & carcinogenesis ,Differentiation ,Self-renewal ,Stem cell ,Signal transduction ,Optogenetic - Abstract
Modulation of the embryonic stem cell state is beneficial for elucidating the innate mechanisms of development and regenerative medicine. Ion flux plays important roles in modulating the transition between stemness and differentiation in mouse embryonic stem cells (mESCs). Optogenetics is a novel tool for manipulating ion flux. To investigate the impact of optical stimulation on embryonic stem cells, optogenetically engineered V6.5 mESCs were used to measure the depolarization mediated by ChR2 on the proliferation, self-renewal, and differentiation of mESCs. Blue light stimulation significantly inhibited ChR2-GFP-V6.5 ESC proliferation and disrupted the cell cycle progression, reducing the proportion of cells in the S phase. Interestingly, optical stimulation could inhibit ChR2-GFP-V6.5 ESC self-renewal and trigger differentiation by activating the extracellular regulated protein kinase (ERK) signaling pathway. Our data suggest that membrane potential changes play pivotal roles in regulating the proliferation, self-renewal and initiation of differentiation of mESCs.
- Published
- 2019
24. New insights into the pathological development of dyslipidemia in patients with hypothyroidism
- Author
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Jingjin Song, Xijie Wu, Hua Peng, Xin Su, Bin Wang, and Xiang Chen
- Subjects
Thyroid Hormones ,Medicine (General) ,endocrine system ,medicine.medical_specialty ,endocrine system diseases ,Thyrotropin ,Fibroblast growth factor ,PCSK9 ,chemistry.chemical_compound ,R5-920 ,Internal medicine ,fibroblast growth factor ,Humans ,Medicine ,angiopoietin-like protein ,Dyslipidemias ,business.industry ,Cholesterol ,Lipid metabolism ,General Medicine ,Proprotein convertase ,medicine.disease ,Endocrinology ,Dyslipidemia ,chemistry ,Kexin ,hypothyroidism ,Proprotein Convertase 9 ,business ,Hormone - Abstract
According to the previous reports, hypothyroidism has been shown to be strongly correlated with increased circulating concentrations of total cholesterol, low-density lipoprotein cholesterol (LDL-C), and triglycerides (TG). Notably, thyroid hormones are confirmed to modulate the production, clearance, and transformation process of cholesterol within circulation of mammals. Moreover, emerging evidence suggests that the thyroid-stimulating hormone could also participate in modulating serum lipid metabolism independently of thyroid hormones, which further induces the pathological development of dyslipidemia. However, the underlying mechanism is still not fully elucidated. Recently, several research studies have demonstrated that the pathogenic progression of hypothyroidism-related dyslipidemia might be correlated with the decreased serum concentrations of thyroid hormones and the increased serum concentrations of thyroid-stimulating hormones. Thus, this indicates that hypothyroidism could induce dyslipidemia and its related cardio-metabolic disorder diseases. In addition, several newly identified modulatory biomarkers, such as proprotein convertase subtilisin/kexin type 9 (PCSK9), angiopoietin-like protein (ANGPTLs), and fibroblast growth factors (FGFs), might play an important role in the regulation of dyslipidemia induced by hypothyroidism. Furthermore, under the status of hypothyroidism, significantly dysfunctional HDL particles could also be observed. In the current review, we summarized the recent knowledge of the relationship between the development of hypothyroidism with dyslipidemia. We also discussed the updated understanding of the mechanisms whereby hypothyroidism induces the risk and the development of dyslipidemia and cardio-metabolic diseases.
- Published
- 2021
25. Substitution of diarylphosphoryl azides with aliphatic amines catalyzed by simple rare‐earth metal salts: Efficient and novel preparation of phosphoryl amides
- Author
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Zhuo Li, Lin-Yu Jiao, Xin-Hua Peng, Rui Bai, and Shanshan Liu
- Subjects
Inorganic Chemistry ,Chemistry ,Simple (abstract algebra) ,Metal salts ,Rare earth ,Substitution (logic) ,Homogeneous catalysis ,General Chemistry ,Combinatorial chemistry ,Catalysis - Published
- 2021
26. Field Measurement Analysis and Control Measures Evaluation of Metro Vehicle Noise Caused by Rail Corrugation
- Author
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Yufei Yao, Hua Peng, Yanglong Zhong, Xiaopei Cai, and Tianchi Sun
- Subjects
rail corrugation ,Technology ,metro vehicle ,interior noise ,wheel–rail noise ,frequency domain analysis ,Field (physics) ,QH301-705.5 ,Acoustics ,QC1-999 ,Track (rail transport) ,Quality (physics) ,Limit (music) ,Noise control ,General Materials Science ,Biology (General) ,Instrumentation ,QD1-999 ,Fluid Flow and Transfer Processes ,Process Chemistry and Technology ,Physics ,General Engineering ,Engineering (General). Civil engineering (General) ,Computer Science Applications ,Noise ,Interior noise ,Chemistry ,Frequency domain ,Environmental science ,TA1-2040 - Abstract
The noise caused by rail corrugation seriously affects the operation quality of metro vehicles. In this work, the rail corrugation, interior noise and wheel–rail noise of a metro line were tested, and the test results were compared with those after two kinds of treatments. The results show that rail corrugation is the main cause of the abnormal interior noise. The interior noise in many sections exceeds the limit, where clear rail corrugations from 31.5~63 mm are found. When the train passes through the rail corrugation section, the interior noise shows a clear increase, and the maximum increase is higher than 25 dB(A). After increasing the lateral stiffness of the track and rail grinding, the interior noise is reduced by 11.4 dB(A). After a long renovation time, the interior noise is effectively equal to that when the renovation was completed. The research results of this work can provide a reference for rail corrugation treatment and noise control.
- Published
- 2021
27. Mechanical stretching of cells and lipid nanoparticles for nucleic acid delivery
- Author
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Yang Xu, Mao-Ze Wang, Zhi-Hong Jiang, Lu Yang, Ting-Wei Gu, and Li-Hua Peng
- Subjects
Small interfering RNA ,Chemistry ,Genetic enhancement ,Cell ,Pharmaceutical Science ,Transfection ,Gene delivery ,Cell biology ,medicine.anatomical_structure ,Nucleic Acids ,Liposomes ,medicine ,Nucleic acid ,Nanoparticles ,Luciferase ,Cytoskeleton ,Plasmids - Abstract
Gene therapy has gained popularity in the treatment of incurable diseases. However, cell components, such as surface membrane, cytoskeleton protein, and nuclear envelope, retard the transport of nucleic acids, lowering the transfection efficiency. We developed a physical-chemical hybrid platform (S-RCLs) involving cationic lipid nanoparticles (RCLs) exposed to cyclic stretch. The transfection efficiency and delivery mechanisms of S-RCLs for siRNAs and pDNAs (plasmid DNAs encoding luciferase) were investigated. S-RCLs effectively delivered both siRNAs and pDNAs by overcoming the cell barriers. Mechanistically, S-RCLs promote the cellular uptake mediated by CD44, EH-domain containing 2 (EHD2), and caveolin-1 (CAV-1); intracellular transport via MAP6 Domain Containing 1 (Map6d1) and F-actin; and DNA transcription regulated by LSM3 and Hist1h3e in the nucleus. Thus, S-RCLs are a promising hybrid platform with excellent efficiency and biocompatibility for gene delivery both in vitro and in vivo.
- Published
- 2021
28. Clinical implications of concentration of alveolar nitric oxide in asthmatic and non-asthmatic subacute cough
- Author
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Ling-Ling Wu, Guan-Sheng Zeng, Hui Chen, Hua-Peng Yu, and Li-Chang Chen
- Subjects
Pulmonary and Respiratory Medicine ,Spirometry ,medicine.medical_specialty ,Nitric Oxide ,Gastroenterology ,Nitric oxide ,Pulmonary function testing ,chemistry.chemical_compound ,FEV1/FVC ratio ,Internal medicine ,medicine ,Humans ,Attention ,Lung ,Asthma ,medicine.diagnostic_test ,business.industry ,medicine.disease ,respiratory tract diseases ,chemistry ,Breath Tests ,Cough ,Exhaled nitric oxide ,business ,Airway ,Airway responsiveness - Abstract
Asthma is an important cause of subacute cough. The concentration of alveolar nitric oxide (CANO) is a sensitive inflammatory indicator in peripheral airways, and it has received much less attention than the fraction of exhaled nitric oxide (FeNO50). The main objective of this study was to explore the correlation between CANO and clinical parameters in asthmatic and non-asthmatic subacute cough, which might promote understanding of the clinical utility of CANO in these special patient populations. 155 patients with subacute cough were included consecutively, of which 25 were diagnosed as asthmatic. Data for demographic characteristics, FeNO50, CANO, baseline spirometry, bronchial provocation test (or bronchodilation test) and response dose ratio (RDR) were collected. Differences between the asthmatic and non-asthmatic groups were analyzed. Spearman’s correlation coefficient (ρ) was used to evaluate the correlation between FeNO50, CANO and other clinical parameters. In patients with subacute cough, baseline CANO values did not differ between asthmatic and non-asthmatic patients (4.4(1.3, 11.4) versus 4.0(2.1, 6.8) ppb, P > 0.05). Besides, CANO exhibited a stronger association with pulmonary function parameters when compared with FeNO50. For asthmatic subacute cough, CANO was inversely correlated with FEV1/FVC (ρ = −0.69, P < 0.01) and small airway parameters including MEF25 (ρ = −0.47, P < 0.05) and MMEF (ρ = −0.45, P < 0.05). For non-asthmatic subacute cough, CANO was inversely correlated with MEF25 (ρ = −0.19, P < 0.05) and RDR (ρ = −0.21, P < 0.05). In subacute cough, asthmatic and non-asthmatic patients had similar values of baseline CANO. In both asthmatic and non-asthmatic subacute cough, CANO exhibited a stronger association with pulmonary function parameters when compared with FeNO50. A low CANO value in non-asthmatic subacute cough corresponded to a higher value of RDR, which implied a stronger tendency towards airway responsiveness.
- Published
- 2021
29. The role of silicon in cadmium alleviation by rice root cell wall retention and vacuole compartmentalization under different durations of Cd exposure
- Author
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Xionghui Ji, Wei Wei, Yunhe Xie, Hao-Yu Chen, Hua Peng, Xin Wang, and Rui Huang
- Subjects
Silicon ,Health, Toxicology and Mutagenesis ,chemistry.chemical_element ,Chromosomal translocation ,Vacuole ,Plant Roots ,Environmental pollution ,Cell wall ,Cell Wall ,Soil Pollutants ,GE1-350 ,Cadmium ,Public Health, Environmental and Occupational Health ,Oryza ,General Medicine ,Compartmentalization (psychology) ,Pollution ,Environmental sciences ,Cytosol ,Retention ,Compartmentalization ,TD172-193.5 ,chemistry ,Vacuoles ,Biophysics ,Rice ,Phytochelatin ,Intracellular - Abstract
Silicon (Si) plays a pivotal role in mitigating phytotoxicity caused by cadmium (Cd). However, few former reports focused on the internal mechanism how Si assisted in alleviating Cd stress in rice under different durations of Cd exposure. Herein, the effects of Si on subcellular distribution of Cd in rice roots under short-term (12 h) and long-term (20 d) Cd exposure were explored. Results showed that Si decreased shoot Cd concentration but had little impact on root Cd levels. Under short-term Cd exposure, subcellular distribution analysis showed that Si increased the ratio of Cd in root cell wall by 23.2~24.0%, and decreased the ratio of Cd in root soluble fraction by 20.6~21.5%. This suggested that Si supply improved root retention of Cd by fixing it on the cell wall and thus restricted intracellular transportation of Cd. Further analysis unraveled that pectin (especially ionic-soluble pectin) of the cell wall was the main binding component, and Si supply induced more Cd accumulation in covalent-soluble pectin and hemicellulose. Moreover, the overexpression of germin-like proteins (GLPs) proved the role of cell wall in moderating Cd toxicity. Under long-term Cd exposure, Si promoted phytochelatin 2 (PC2) and phytochelatin 3 (PC3) synthesis in cytosol, at the same time, Si down-regulated the expression of the Cd efflux-related protein multidrug resistance-associated protein-like ATP-binding cassette transporters (MRP-like ABC transporters) and limited Cd transportation from vacuole to cytosol. Taken together, Si rather predominates in limiting Cd translocation by the cell wall of root under short-term Cd exposure and promoting vacuole compartmentalization to mitigate the Cd toxicity under long-term exposure, instead of reducing the absorption of Cd in rice roots, thereby decreasing Cd delivery into shoots.
- Published
- 2021
30. Derivation and Validation of a Nomogram for Predicting 90-Day Survival in Patients With HBV-Related Acute-on-Chronic Liver Failure
- Author
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Jun-feng Chen, Wei-zhen Weng, Miao Huang, Xiao-hua Peng, Jian-rong He, Jing Zhang, Jing Xiong, Shao-quan Zhang, Hui-juan Cao, Bin Gao, Deng-na Lin, Juan Gao, Zhi-liang Gao, and Bing-liang Lin
- Subjects
medicine.medical_specialty ,Medicine (General) ,genetic structures ,CLIF-C ACLF score ,Chronic liver disease ,medicine.disease_cause ,Gastroenterology ,COSSH score ,nomogram ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,R5-920 ,Internal medicine ,medicine ,Hepatic encephalopathy ,Original Research ,Hepatitis B virus ,Creatinine ,business.industry ,MELD score ,Retrospective cohort study ,CLIF-C OF score ,General Medicine ,Nomogram ,medicine.disease ,chemistry ,030220 oncology & carcinogenesis ,Medicine ,030211 gastroenterology & hepatology ,prognosis ,acute-on-chronic liver failure ,business ,Alpha-fetoprotein ,hepatitis B virus ,TBIL - Abstract
Background: Conventional prognostic models do not fully reflect the severity of hepatitis B virus (HBV)-related acute-on-chronic liver failure (ACLF). This study aimed to establish an effective and convenient nomogram for patients with HBV-related ACLF.Methods: A nomogram was developed based on a retrospective cohort of 1,353 patients treated at the Third Affiliated Hospital of Sun Yat-sen University from January 2010 to June 2016. The predictive accuracy and discriminatory ability of the nomogram were determined by a concordance index (C-index) and calibration curve, and were compared with current scoring systems. The results were validated using an independent retrospective cohort of 669 patients consecutively treated at the same institution from July 2016 to March 2018. This study is registered at ClinicalTrials.gov (NCT03992898).Results: Multivariable analysis of the derivation cohort found that independent predictors of 90-day survival were age, white blood cell (WBC) count, hemoglobin (Hb), aspartate aminotransferase (AST), total bilirubin (TBil), international normalized ratio, serum creatinine (Cr), alpha fetoprotein (AFP), serum sodium (Na), hepatic encephalopathy (HE), pre-existing chronic liver disease(PreLD), and HBV DNA load. All factors were included in the nomogram. The nomogram calibration curve for the probability of 90-day survival indicated that nomogram-based predictions were in good agreement with actual observations. The C-index of the nomogram was 0.790, which was statistically significantly greater than those for the current scoring systems in the derivation cohort (P < 0.001). The results were confirmed in the validation cohort.Conclusions: The proposed nomogram is more accurate in predicting the 90-day survival of patients with HBV-related ACLF than current commonly used methods.
- Published
- 2021
31. The AIM2 and NLRP3 inflammasomes trigger IL-1–mediated antitumor effects during radiation
- Author
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Victoria Godfrey, Hua Peng, Yanfei Han, Yang Xin Fu, Chuanhui Han, Ralph R. Weichselbaum, Zhida Liu, Hasan Zaki, and Longchao Liu
- Subjects
0301 basic medicine ,Inflammasomes ,Interleukin-1beta ,Immunology ,Mice, Transgenic ,CD8-Positive T-Lymphocytes ,Radiation Tolerance ,Extracellular vesicles ,03 medical and health sciences ,AIM2 ,0302 clinical medicine ,Neoplasms ,Radioresistance ,NLR Family, Pyrin Domain-Containing 3 Protein ,Tissue damage ,medicine ,Animals ,Cells, Cultured ,Mice, Inbred BALB C ,Antitumor immunity ,Chemistry ,Macrophages ,Caspase 1 ,Cancer ,Inflammasome ,Dendritic Cells ,General Medicine ,medicine.disease ,Coculture Techniques ,DNA-Binding Proteins ,Mice, Inbred C57BL ,030104 developmental biology ,030220 oncology & carcinogenesis ,Cancer research ,Female ,medicine.drug - Abstract
The inflammasome promotes inflammation-associated diseases, including cancer, and contributes to the radiation-induced tissue damage. However, the role of inflammasome in radiation-induced antitumor effects is unclear. We observed that tumors transplanted in Casp1-/- mice were resistant to radiation treatment compared with tumors in wild-type (WT) mice. To map out which molecule in the inflammasome pathway contributed to this resistant, we investigated the antitumor effect of radiation in several inflammasome-deficient mice. Tumors grown in either Aim2-/- or Nlrp3-/- mice remained sensitive to radiation, like WT mice, whereas Aim2-/-Nlrp3-/- mice showed radioresistance. Mechanistically, extracellular vesicles (EVs) and EV-free supernatant derived from irradiated tumors activated both Aim2 and Nlrp3 inflammasomes in macrophages, leading to the production of interleukin-1β (IL-1β). IL-1β treatment helped overcome the radioresistance of tumors growing in Casp1-/- and Aim2-/-Nlrp3-/- mice. IL-1 signaling in dendritic cells (DCs) promoted radiation-induced antitumor immunity by enhancing the cross-priming activity of DCs. Overall, we demonstrated that radiation-induced activation of the AIM2 and NLRP3 inflammasomes coordinate to induce some of the antitumor effects of radiation by triggering IL-1 signaling in DCs, leading to their activation and cross-priming.
- Published
- 2021
32. Transcriptomic dynamics changes related to anthocyanin accumulation in the fleshy roots of carmine radish (Raphanus sativus L.) characterized using RNA-Seq
- Author
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Hua Peng, Xia Song, and Jian Gao
- Subjects
0106 biological sciences ,Raphanus ,lcsh:Medicine ,Biology ,01 natural sciences ,General Biochemistry, Genetics and Molecular Biology ,Anthocyanins ,03 medical and health sciences ,chemistry.chemical_compound ,Pigment ,Biosynthesis ,Anthocyanin biosynthesis ,Botany ,Radish (Raphanus sativus L.) ,030304 developmental biology ,0303 health sciences ,Bolting ,General Neuroscience ,fungi ,Differential expression genes (DEGs) ,lcsh:R ,food and beverages ,General Medicine ,KEGG pathway enrichment ,biology.organism_classification ,Flavonoid biosynthesis ,chemistry ,Seedling ,Biosynthetic process ,Anthocyanin ,visual_art ,visual_art.visual_art_medium ,General Agricultural and Biological Sciences ,010606 plant biology & botany - Abstract
Carmine radish is famous for containing a natural red pigment (red radish pigment). However, the expression of anthocyanin biosynthesis-related genes during the dynamic development stages of the fleshy roots in carmine radish has not been fully investigated. Here, based on HPLC quantification of anthocyanin levels from our previous study, young fleshy roots of the carmine radish “Hongxin 1” obtained at the dynamic development stages of fleshy roots (seedling stage (SS), initial expansion (IE), full expansion (FE), bolting stage (BS), initial flowering stage (IFS), full bloom stage (FBS) and podding stage (PS)) were used for RNA-Seq. Approximately 126 comodulated DEGs related to anthocyanin biosynthesis (common DEGs in the dynamic growth stages of fleshy roots in carmine radish) were identified, from which most DEGs appeared to be likely to participate in anthocyanin biosynthesis, including two transcription factors, RsMYB and RsRZFP. In addition, some related proteins, e.g., RsCHS, RsDFR, RsANS, RsF′3H, RsF3GGT1, Rs3AT1, RsGSTF12, RsUFGT78D2 and RsUDGT-75C1, were found as candidate contributors to the regulatory mechanism of anthocyanin synthesis in the fleshy roots of carmine radish. In addition, 11 putative DEGs related to anthocyanin synthesis were evaluated by qRT-PCR via the (2-ΔΔCT) method; the Pearson correlation analysis indicated excellent concordance between the RNA-Seq and qRT-PCR results. Furthermore, GO enrichment analysis showed that “anthocyanin-containing compound biosynthetic process” and “anthocyanin-containing compound metabolic process” were commonly overrepresented in the dynamic growth stages of fleshy roots after the initial expansion stage. Moreover, five significantly enriched pathways were identified among the DEGs in the dynamic growth stages of fleshy roots in carmine radish, namely, flavonoid biosynthesis, flavone and flavonol biosynthesis, diterpenoid biosynthesis, anthocyanin biosynthesis, and benzoxazinoid biosynthesis. In conclusion, these results will expand our understanding of the complex molecular mechanisms of anthocyanin biosynthesis in the fleshy roots of carmine radish and the putative candidate genes involved in this process.
- Published
- 2021
33. N6-methyladenosine RNA modification suppresses antiviral innate sensing pathways via reshaping double-stranded RNA
- Author
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Yanan Peng, Weinan Qiu, Xin Yang, Angang Yang, Bao-Fa Sun, Guanshen Cui, Hua Peng, Yanan Gao, Hongyu Deng, Rui Zhang, Yangxu Lu, Qingyang Zhang, Pengyuan Yang, Yun-Gui Yang, Ying Yang, Xin Wang, Zijuan Gu, and Huabin Tian
- Subjects
0301 basic medicine ,Adenosine ,viruses ,General Physics and Astronomy ,chemistry.chemical_compound ,Mice ,0302 clinical medicine ,Chlorocebus aethiops ,Multidisciplinary ,biology ,MDA5 ,Cell biology ,RNA silencing ,medicine.anatomical_structure ,Vesicular stomatitis virus ,030220 oncology & carcinogenesis ,Interferon Type I ,RNA, Viral ,Epigenetics ,Signal Transduction ,Science ,chemical and pharmacologic phenomena ,General Biochemistry, Genetics and Molecular Biology ,Article ,Vesicular stomatitis Indiana virus ,03 medical and health sciences ,Cell Line, Tumor ,medicine ,Animals ,Humans ,Vero Cells ,Monocytes and macrophages ,RNA, Double-Stranded ,Monocyte ,RNA ,RNA virus ,General Chemistry ,Antimicrobial responses ,Methyltransferases ,biochemical phenomena, metabolism, and nutrition ,biology.organism_classification ,Immunity, Innate ,030104 developmental biology ,HEK293 Cells ,RAW 264.7 Cells ,chemistry ,Cytoplasm ,A549 Cells ,RIG-I-like receptors ,N6-Methyladenosine ,HeLa Cells - Abstract
Double-stranded RNA (dsRNA) is a virus-encoded signature capable of triggering intracellular Rig-like receptors (RLR) to activate antiviral signaling, but whether intercellular dsRNA structural reshaping mediated by the N6-methyladenosine (m6A) modification modulates this process remains largely unknown. Here, we show that, in response to infection by the RNA virus Vesicular Stomatitis Virus (VSV), the m6A methyltransferase METTL3 translocates into the cytoplasm to increase m6A modification on virus-derived transcripts and decrease viral dsRNA formation, thereby reducing virus-sensing efficacy by RLRs such as RIG-I and MDA5 and dampening antiviral immune signaling. Meanwhile, the genetic ablation of METTL3 in monocyte or hepatocyte causes enhanced type I IFN expression and accelerates VSV clearance. Our findings thus implicate METTL3-mediated m6A RNA modification on viral RNAs as a negative regulator for innate sensing pathways of dsRNA, and also hint METTL3 as a potential therapeutic target for the modulation of anti-viral immunity., N6-methyladenosine (m6A) RNA modification regulates RNA metabolism, and has been implicated in immune regulation. Here, the authors show that the m6A methyltransferase, METTL3, translocates into the cytoplasm to increase viral RNA m6A modification, decreases viral ds RNA content, and thereby dampens the RIG/MDA5-induced anti-viral immunity.
- Published
- 2021
34. Effect of Si on As Speciation and Distribution in Rice near the Shimen Realgar Mine
- Author
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Cai Jiapei, Vladimir Matichenkov, Elena Bocharnikova, Zhu Jian, Wei Wei, Hua Peng, and Xionghui Ji
- Subjects
food and beverages ,chemistry.chemical_element ,Sorption ,010501 environmental sciences ,Realgar ,Contamination ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,complex mixtures ,01 natural sciences ,Tailings ,chemistry.chemical_compound ,chemistry ,Wastewater ,Environmental chemistry ,Dissolution ,Potassium silicate ,Arsenic ,0105 earth and related environmental sciences ,Water Science and Technology - Abstract
Protection of natural water and cultivated crops from contamination in mining-affected areas is a problem in many regions. Wastewater and waste residuals from the Shimen realgar mine in Hunan Province, China, pose a high risk of arsenic (As) poisoning. The potassium silicate (PS)-assisted mechanisms of As mobility and accumulation reduction in a paddy soil–plant system were investigated. In a vegetation experiment, rice was grown in moderately and highly As-polluted soil (30.6 and 66.9 mg kg−1 of As, correspondingly) with and without PS. Total As and silicon (Si) in roots, shoots, and grains and the forms of As in the grains were analyzed. Sequential extraction of the As in the soil showed that the PS significantly reduced the mobility of As in the soil and its accumulation by rice. Several PS-mediated mechanisms were discussed: (1) dissolution of PS monosilicic acid enhances the sorption capacity of Si-based minerals for As; (2) increased pH in the soil solution provides higher As sorption by soil; (3) Si-induced competitive inhibition of As(III) transport initiated by Lsi1 and Lsi2. The results indicate the potential of using soluble Si to reduce As mobility and biotoxicity at sites with high levels of As in wastewater, tailings, and waste residuals.
- Published
- 2019
35. Termipaniculatones A-F, chalcone-flavonone heterodimers from Terminthia paniculata, and their protective effects on hyperuricemia and acute gouty arthritis
- Author
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Tong-Hua Yang, Hua Peng, Xiao-Yan Huang, Xue-Mei Zhang, Yan Dexiu, Chang-An Geng, Bo Hou, Ji-Jun Chen, and Yun-Bao Ma
- Subjects
Male ,0106 biological sciences ,Xanthine Oxidase ,Chalcone ,Anacardiaceae ,Mice, Inbred Strains ,Hyperuricemia ,Plant Science ,Horticulture ,Pharmacology ,01 natural sciences ,Biochemistry ,Mice ,Structure-Activity Relationship ,chemistry.chemical_compound ,In vivo ,medicine ,Animals ,Edema ,Potency ,Enzyme Inhibitors ,Xanthine oxidase ,Molecular Biology ,Inflammation ,Biflavonoids ,Dose-Response Relationship, Drug ,Molecular Structure ,biology ,Arthritis, Gouty ,010405 organic chemistry ,Anti-Inflammatory Agents, Non-Steroidal ,Active site ,General Medicine ,medicine.disease ,In vitro ,Uric Acid ,0104 chemical sciences ,Oxonic Acid ,chemistry ,Flavanones ,biology.protein ,010606 plant biology & botany - Abstract
Terminthia paniculata (Sanyeqi) is widely used for treating inflammation and rheumatic arthritis in the folk areas of Yunnan province, China. Its total extract was first revealed with xanthine oxidase (XO) inhibitory activity in vitro and anti-hyperuricemic effect in vivo. Bioassay-guided separation on Fr. A5 yielded six chalcone-flavonone heterodimers, termipaniculatones A-F. Their structures were elucidated based on extensive spectroscopic analyses involving HRESIMS, 1D and 2D NMR, UV, IR and [α]D, and the absolute configuration of termipaniculatone F was verified by ECD calculation. Termipaniculatones A and E showed obvious XO inhibitory activity with IC50 values of 55.6 and 89.5 μM, respectively, which took effects via a mix-type mode. A molecular modeling study revealed that termipaniculatone A was well located into the active site of XO by interacting with Glu802, Arg880, Thr1010 and Val1011 residues. Termipaniculatone A showed anti-hyperuricemic effects by decreasing serum uric acid levels and inhibiting XO activity in both serum and liver on potassium oxonate (PO)-induced hyperuricemia mice, and anti-inflammatory activity through alleviating paw swelling on monosodium urate (MSU)-induced mice, at the concentration of 20 mg/kg. This is the first time to reveal the anti-hyperuricemic and anti-acute gouty arthritis potency of T. paniculata and the characteristic biflavonoids as active constituents, which provides valuable information for searching new XO inhibitors from natural sources.
- Published
- 2019
36. (Pro)renin receptor regulates lung development via the Wnt/β-catenin signaling pathway
- Author
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Renfang Song, Yalan Liu, Ihor V. Yosypiv, Hua Peng, Jie Liu, Yafan Zhou, Yan Chen, Lei Li, Yali Liu, and Yumei Feng
- Subjects
0301 basic medicine ,Pulmonary and Respiratory Medicine ,Vacuolar Proton-Translocating ATPases ,Physiology ,Organogenesis ,Pro renin receptor ,Wnt β catenin signaling ,Down-Regulation ,Receptors, Cell Surface ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Physiology (medical) ,Renin ,Renin–angiotensin system ,Morphogenesis ,medicine ,Animals ,Receptor ,Lung ,Wnt Signaling Pathway ,Organ system ,Cell Proliferation ,Chemistry ,Cell Differentiation ,Cell Biology ,respiratory system ,Cell biology ,Mice, Inbred C57BL ,030104 developmental biology ,medicine.anatomical_structure ,Research Article - Abstract
The (pro)renin receptor [(P)RR] binds to prorenin to activate the renin-angiotensin system and is essential for the development of many different organ systems. Whether the (P)RR also plays a role in lung development is unknown. Immunostaining was used to determine the spatial-temporal distribution of (P)RR in the embryonic, postnatal, and adult lungs. We created a lung-specific (P)RR knockout mouse [ Foxd1cre/+ -(P)RRflox/flox] and assessed changes in lung morphology, cell proliferation, and apoptosis using immunohistochemistry and TUNEL staining. (P)RR function was confirmed by using siRNA to knock down (P)RR in human bronchial epithelial cells (HBECs) and then using the CCK-8 assay and flow cytometry to assess cell proliferation and apoptosis. Gene expression changes after knockdown were assessed by RT-PCR and Western blotting. (P)RR is expressed in the club cells of the bronchial epithelium, and expression increases throughout development. Lung-specific (P)RR knockout disrupted branching morphogenesis, leading to lung hypoplasia and neonatal mortality. These defects were associated with increased apoptosis and decreased proliferation of the pulmonary epithelial and mesenchymal cells and may be mediated by downregulation of Wnt11, β-catenin, and Axin2. (P)RR regulates lung development through canonical Wnt/β-catenin signaling and may present a new target for strategies to treat lung hypoplasia.
- Published
- 2019
37. Astragalus polysaccharides suppresses high glucose-induced metabolic memory in retinal pigment epithelial cells through inhibiting mitochondrial dysfunction-induced apoptosis by regulating miR-195
- Author
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Ping Liu, Ping Tong, Qing-Hua Peng, and Wen-Jie Li
- Subjects
0301 basic medicine ,Apoptosis ,Retinal Pigment Epithelium ,medicine.disease_cause ,chemistry.chemical_compound ,0302 clinical medicine ,Diabetic retinopathy ,Malondialdehyde ,lcsh:QD415-436 ,Genetics (clinical) ,Cells, Cultured ,Membrane Potential, Mitochondrial ,TUNEL assay ,medicine.diagnostic_test ,Cell biology ,Mitochondria ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Molecular Medicine ,Research Article ,Signal Transduction ,Blotting, Western ,Astragalus polysaccharides ,Flow cytometry ,lcsh:Biochemistry ,03 medical and health sciences ,miR-195 ,Polysaccharides ,Metabolic memory ,Genetics ,medicine ,In Situ Nick-End Labeling ,Animals ,Humans ,Molecular Biology ,Retinal pigment epithelium ,Mitochondrial damage ,Superoxide Dismutase ,lcsh:RM1-950 ,Retinal ,Astragalus Plant ,Rats ,MicroRNAs ,030104 developmental biology ,Glucose ,HEK293 Cells ,lcsh:Therapeutics. Pharmacology ,chemistry ,Apoptotic signaling pathway ,Oxidative stress ,Immunostaining - Abstract
Background Metabolic memory contributes to the development of diabetic retinopathy (DR), which is the complication of diabetes. But it’s still unknown how to prevent the metabolic memory to treat the DR. In our study, we want to examine the function of Astragalus polysaccharides (APS) in the metabolic memory of retinal pigment epithelium (RPE) pretreated with high glucose (HG). Methods ARPE-19 and PRPE cells were exposed to HG followed by normal glucose (NG) treatment with or without APS. QPCR was used to examine the levels of miR-195 and Bcl-2. MDA and SOD detection assays were used to examine the oxidative stress level. Western blotting and immunostaining were applied to detect the protein level of mitochondrial damage and apoptotic signaling pathway. Flow cytometry and TUNEL staining were used to analyze cell apoptosis. Luciferase assay was used to examine the direct target of miR-195. Results APS treatment significantly decreased the expression of miR-195, while increased the expression of Bcl-2 with optimized dosages which were induced by HG treatment, even after replacing the HG with NG. And we found Bcl-2 was the direct target of miR-195. APS alleviated the oxidative stress, mitochondrial damage and cell apoptosis induced by HG and HG + NG treatments in RPE cells via regulating miR-195. Furthermore, we found overexpression of miR-195 abolished the alleviated effects of APS on the HG-treated RPE cells. Conclusions APS suppressed high glucose-induced metabolic memory in retinal pigment epithelial cells through inhibiting mitochondrial dysfunction-induced apoptosis by regulating miR-195.
- Published
- 2019
38. Copper-Catalyzed Direct α-Nitration of Nitrostilbenes with Nitrogen Dioxide
- Author
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Hui Zou, Xin Hua Peng, Xi Gao, Kai Hao Chen, and Guan Sheng Xiao
- Subjects
010405 organic chemistry ,Organic Chemistry ,Substrate (chemistry) ,010402 general chemistry ,01 natural sciences ,Combinatorial chemistry ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Nitration ,Nitro ,Copper catalyzed ,Stereoselectivity ,Nitrogen dioxide - Abstract
A novel and efficient method for the direct α-nitration of nitrostilbenes was developed in which NO2 was used as the nitro source. This method provided (E)-α-nitrostilbenes derivatives in moderate to good yields. A broad substrate scope, mild and convenient conditions, and high stereoselectivity are important features of this method.
- Published
- 2019
39. Polyurethane, epoxy resin and polydimethylsiloxane altered biofilm formation and mussel settlement
- Author
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Jin-Long Yang, Shuxue Zhou, Kiyoshi Osatomi, Nikoleta Bellou, Li Hua Peng, Xiao Liang, Shuo Zhang, Sergey Dobretsov, Asami Yoshida, and Xing Pan Guo
- Subjects
Cyanobacteria ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,Ruegeria ,Microorganism ,Polyurethanes ,0208 environmental biotechnology ,02 engineering and technology ,010501 environmental sciences ,Ecotoxicology ,01 natural sciences ,Animals ,Environmental Chemistry ,Biomass ,Dimethylpolysiloxanes ,0105 earth and related environmental sciences ,Diatoms ,Mytilus ,biology ,Epoxy Resins ,Chemistry ,Chlorophyll A ,Microbiota ,technology, industry, and agriculture ,Public Health, Environmental and Occupational Health ,Biofilm ,Alphaproteobacteria ,General Medicine ,General Chemistry ,Mussel ,biochemical phenomena, metabolism, and nutrition ,biology.organism_classification ,Pollution ,020801 environmental engineering ,Biofilms ,Mytilus coruscus ,Environmental chemistry - Abstract
In many environments, biofilms are a major mode and an emergent form of microbial life. Biofilms play crucial roles in biogeochemical cycling and invertebrate recruitment in marine environments. However, relatively little is known about how marine biofilms form on different substrata and about how these biofilms impact invertebrate recruitment. Here, we performed a comparative analysis of a 28-day-old biofilm community on non-coated (a control glass) and coated substrata (polyurethane (PU), epoxy resin (EP) and polydimethylsiloxane (PDMS)) and examined the settlement of Mytilus coruscus plantigrades on these biofilms. PU, EP and PDMS deterred the development of marine biofilms by reducing the biofilm biomass including the biofilm dry weight, cell density of the bacteria and diatoms and chlorophyll a concentrations. Further analysis of bacterial community revealed that EP altered the bacterial community composition compared with that on the glass substrata by reducing the relative abundance of Ruegeria (Alphaproteobacteria) and by increasing the relative abundance of Methylotenera (Betaproteobacteria) and Cyanobacteria in the biofilms. However, bacterial communities developed on PU and PDMS, as well as glass and PU, EP and PDMS did not exhibit differences from each other. The M. coruscus settlement rates on biofilms on PU, EP and PDMS were reduced by 20-41% compared with those on the glass after 28 days. Thus, the tested coatings impacted the development of marine biofilms by altering the biofilm biomass and/or the bacterial community composition. The mussel settlements decreased in the biofilms that formed on the coatings compared with those on non-coated glass.
- Published
- 2019
40. GABA inhibits proliferation and self-renewal of mouse retinal progenitor cell
- Author
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Lu Du, Wei Li, Shaojun Wang, and Guang-Hua Peng
- Subjects
0301 basic medicine ,Cancer Research ,Immunology ,Cell ,lcsh:RC254-282 ,Article ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,SOX2 ,medicine ,lcsh:QH573-671 ,Chemistry ,GABAA receptor ,Cell growth ,lcsh:Cytology ,Neurogenesis ,Cell Biology ,Cell cycle ,Nestin ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Neural stem cell ,Cell biology ,030104 developmental biology ,medicine.anatomical_structure ,nervous system ,030220 oncology & carcinogenesis ,sense organs - Abstract
Gamma-amino butyric acid (GABA) is the main inhibitory neurotransmitter in the central nervous system, including the retina, and play an important role in both regulating neurogenesis and neural stem cell proliferation. GABAa receptor has been identified in the retina, however, the function of GABAa receptor on retinal progenitor cell (RPC) is unclear. RPCs were cultured to analyze changes in cell proliferation and cell cycle distribution after GABAa receptor activation. The activation of GABAa receptor significantly inhibits RPCs proliferation, cell cycle progress, and self-renewal. Moreover, the activation of GABAa receptor leads to the up-expression of p21 and p27 and down-expression of Nestin, Pax6, Sox2, and Chx10. These results suggest that GABA acts as a negative regulator of RPCs proliferation and self-renewal.
- Published
- 2019
41. Effects of Dendrobium Officinale Polysaccharides on Brain Inflammation of Epileptic Rats
- Author
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Bin He, Lin Zhang, You Yin, Jin Xu, Xu Yixin, Jianhua Zhuang, and Hua Peng
- Subjects
MAPK/ERK pathway ,chemistry.chemical_classification ,0303 health sciences ,Messenger RNA ,Article Subject ,Polymers and Plastics ,medicine.diagnostic_test ,Chemistry ,p38 mitogen-activated protein kinases ,Inflammation ,Pharmacology ,lcsh:Chemical technology ,Polysaccharide ,03 medical and health sciences ,Dendrobium officinale ,0302 clinical medicine ,Western blot ,medicine ,Phosphorylation ,lcsh:TP1-1185 ,medicine.symptom ,030217 neurology & neurosurgery ,030304 developmental biology - Abstract
Objective. To investigate the effects of Dendrobium officinale polysaccharides (DOPS) on the expression of inflammatory factors IL-1β and TNF-α and the MKP-1/MAPK signal pathway. Methods. PTZ-induced epileptic rat models were established. The rats were randomly divided into four groups: the control group, the DOPS group, the model group, and the DOPS intervention group. RT-PCR was used to measure the mRNA expression of IL-1β and TNF-α in the hippocampi of all groups; western blot was used to measure the protein expression of IL-1β and TNF-α and phosphorylation of ERK1/2, JNK, p38, and MKP-1 in the hippocampi of all groups at weeks 1, 2, 3, and 4 after modeling. Results. At weeks 1, 2, 3, and 4 after modeling, there were no significant differences between the control group and the DOPS group in the mRNA and protein expression of IL-1β and TNF-α and phosphorylation of ERK1/2, JNK, p38, and MKP-1 (all P>0.05); the mRNA and protein expression of IL-1β and TNF-α and phosphorylation of ERK1/2, JNK, and p38 were significantly increased, while the phosphorylation of MKP-1 was decreased in the model group compared with the control group. The mRNA and protein expression of IL-1β and TNF-α and phosphorylation of ERK1/2, JNK, and p38 were significantly decreased, while the phosphorylation of MKP-1 was increased in the DOPS intervention group compared with the model group. Conclusion. DOPS can reduce PTZ-induced brain inflammation and seizures of epileptic rats by inhibiting IL-1β, TNF-α, and MAPK signal pathways.
- Published
- 2019
42. Progress in the Use of Molecular Hydrogen for Cancer Treatment
- Author
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Jian Gang Long, Yun Hua Peng, Jian Kang Liu, and Dong Yue Du
- Subjects
Chemistry ,Hydrogen molecule ,Cancer research ,Cancer treatment - Published
- 2019
43. Bifunctional organocatalysts for the conversion of CO2, epoxides and aryl amines to 3-aryl-2-oxazolidinones
- Author
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Lei Shi, Ya-Fei Xie, Ning Liu, Cheng Guo, and Bang-Hua Peng
- Subjects
Reaction conditions ,010405 organic chemistry ,Aryl ,Organic Chemistry ,Epoxide ,Alcohol ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Cycloaddition ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Organic chemistry ,Amine gas treating ,Physical and Theoretical Chemistry ,Bifunctional - Abstract
A route to synthesize 3-aryl-2-oxazolidinones is developed, which is achieved through a three component reaction between CO2, aryl amines, and epoxides with a binary organocatalytic system composed of organocatalysts and DBU (1,8-diazabicyclo[5.4.0]undec-7-ene). The method allows wide scopes of epoxide and aryl amine substrates with various functional groups under mild reaction conditions. The control experiments indicate that a cyclic carbonate is formed via cycloaddition of epoxides with CO2, which further reacts with the β-amino alcohol originating from epoxides and aryl amines, resulting in the formation of 3-aryl-2-oxazolidinones finally.
- Published
- 2019
44. Combinative Approaches of Chemistry, Pharmacology and Toxicology for the Optimal Pharmaceutical Preparation of an Anti-arthritic Chinese Medicine Formulation QFJBT
- Author
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Wei Wang, Xin Li, Ye Lin, Ting Zhang, Qing-Hua Peng, Liang Liu, Huang-He Yu, Xiong Cai, Ling Tan, Houpan Song, and Cong Chen
- Subjects
Chemistry ,lcsh:R ,Medicine (miscellaneous) ,lcsh:Medicine ,Health Informatics ,Traditional Chinese medicine ,lcsh:Other systems of medicine ,Pharmacology ,lcsh:RZ201-999 ,Moutan cortex ,High-performance liquid chromatography ,Anti arthritic ,Computer Science Applications ,Safety profile ,Paeoniae Radix ,Complementary and alternative medicine ,Botanical drug ,Radix - Abstract
ObjectiveQing Fu Juan Bi Tang (QFJBT) is an anti-arthritic Chinese medicine formula consisting of five herbs: Aconiti Lateralis Radix Praeparata (Fu Zi, 附子), Sinomenii Caulis (Qing Feng Teng, 青风藤), Astragali Radix (Huang Qi, 黄芪), Paeoniae Radix Alba (Bai Shao, 白芍) and Moutan Cortex (Mu Dan Pi, 牡丹皮), which have well-established histories of use for treatment of rheumatic and arthritic diseases. We intended to establish the optimized and standardized pharmaceutical procedures and manufacturing processes for the pilot production of QFJBT to develop it as a novel botanical drug product for treatment of rheumatoid arthritis (RA).Methods The combinative approaches of chemical assessment, toxicological and pharmacological evaluation were explored to define the pharmaceutical preparation of QFJBT.Results The optimized and standardized pharmaceutical procedures and manufacturing processes for the pilot production of QFJBT were established in terms of greatest chemical contents of bioactive constituents, potent anti-inflammatory and antinociceptive activities, and favorable safety profile. Quality analysis of the pilot product of QFJBT by high-performance liquid chromatography (HPLC) demonstrated that the chromatographic fingerprint profiles of three batches of QFJBT were basically identical and the contents of four characteristic and bioactive markers were relatively consistent. General toxicological studies showed a favorable safety profile of QFJBT. The maximum tolerated single dose of QFJBT was determined in both sexes of rats to be 33.63 g/kg body weight which is equivalent to 346 times of clinical dose. In the chronic oral toxicity study, the results of laboratory investigation showed that QFJBT at doses of 3.89, 6.80 and 9.72 g/kg body weight (equivalent to 40, 70 and 100-fold clinical doses, respectively) caused no changes in all hematological parameters and blood biochemical parameters of rats. No mortality or specific toxic responses were observed in animals after three months of repeated dosing with QFJBT.Conclusion The optimized and standardized pharmaceutical and manufacturing processes for the production of QFJBT have been successfully screened and identified through established rigorous in-process controls. Keywords: QFJBT, Rheumatoid arthritis, Pharmaceutical preparation, Quality control, Safety profile, Anti-inflammatory and antinociceptive effects
- Published
- 2018
45. RhoA protects the podocytes against high glucose-induced apoptosis through YAP and plays critical role in diabetic nephropathy
- Author
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Jie Xiao, Hui Yu, Jialin Zhou, Zongshun Huang, Yong-Hua Peng, and Xiao-Min Yu
- Subjects
Male ,rho GTP-Binding Proteins ,0301 basic medicine ,RHOA ,Biophysics ,Apoptosis ,Cell Cycle Proteins ,Biochemistry ,Diabetes Mellitus, Experimental ,Podocyte ,Diabetic nephropathy ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Animals ,Humans ,Diabetic Nephropathies ,Small GTPase ,Nuclear protein ,Molecular Biology ,Adaptor Proteins, Signal Transducing ,Mice, Inbred BALB C ,Gene knockdown ,Proteinuria ,biology ,Podocytes ,Chemistry ,YAP-Signaling Proteins ,Cell Biology ,Phosphoproteins ,medicine.disease ,Cell biology ,Mice, Inbred C57BL ,Glucose ,030104 developmental biology ,medicine.anatomical_structure ,Gene Knockdown Techniques ,biology.protein ,medicine.symptom ,rhoA GTP-Binding Protein ,030217 neurology & neurosurgery - Abstract
Background Podocyte apoptosis is important mechanism that leading to proteinuria in Diabetic nephropathy (DN), but the underling mechanisms that cause podocyte apoptosis in DN are not very clear. We have recently demonstrated that RhoA, a small GTPase protein, effectively protected podocyte apoptosis induced by LPS and ADR in vitro. However, the potential role of RhoA in DN is unknown. Methods and results Conditionally immortalized mouse podocyte cells, C57BL/KsJ, db/db diabetic mice, and renal biopsies from patients with DN were used for study. The treatment of podocytes with high glucose (HG) for 48h significantly induced cell apoptosis and decreased RhoA expression and its activity. The expression of RhoA was also decreased in glomerular podocytes of db/db mice and patients with DN. Knockdown of RhoA by siRNA contributed in the apoptosis of podocyte and induced proteinuria in db/db mice. Beyond the increased pro-apoptotic Bax and the decreased anti-apoptotic Bcl-2, RhoA knockdown also inhibited the expression of a nuclear protein of YAP in podocyte. Over expression active form of YAP completely abolished the apoptosis of podocyte induced by RhoA knockdown. Conclusion RhoA plays a critical role in DN probably by mediating the podocyte apoptosis through YAP. RhoA may be a novel molecular target for the treatment of DN.
- Published
- 2018
46. Effects of Shuang Dan Ming Mu Capsule on Expression of VEGF-a, VEGF-b, VEGF-c and the VEGF receptor, Flk-1, in Diabetic Retinopathy Rats
- Author
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Qing-Hua Peng, Jun Peng, Zheng-Rong Liu, Kun Pan, and Yu-Hui Qin
- Subjects
medicine.medical_specialty ,VEGF receptors ,lcsh:Medicine ,Medicine (miscellaneous) ,Health Informatics ,chemistry.chemical_compound ,Internal medicine ,Medicine ,biology ,business.industry ,lcsh:R ,Capsule ,Retinal ,Tail vein ,Kinase insert domain receptor ,lcsh:Other systems of medicine ,Diabetic retinopathy ,lcsh:RZ201-999 ,medicine.disease ,Streptozotocin ,Computer Science Applications ,Endocrinology ,Complementary and alternative medicine ,chemistry ,biology.protein ,Immunohistochemistry ,business ,medicine.drug - Abstract
Objective The effects of Shuang Dan Ming Mu capsule on expression of VEGF-a, VEGF-b, VEGF-c and the VEGF receptor, Flk-1, were examined in a diabetic retinopathy rats model.Methods Forty Sprague-Dawley (SD) rats were randomized into Groups A (blank), B (model), C (Shuang Dan Ming Mu) and D (positive control) group, with each group containing 10 rats and 20 eyes. Rats from groups B, C and D were administered one dose of 50 mg/kg streptozotocin (STZ) by tail vein injection to establish a diabetic rat model. One week after model preparation, medication was continuously administered by gavage. After gavage for 8 weeks, the animals were sacrificed and retinal expression of VEGF-a, VEGF-b, VEGF-c and Flk-1 was quantified by immunohistochemical analysis.Results At week 8 of drug administration after model preparation, the average protein expression grayscale values for VEGF-a, VEGF-b, VEGF-c and Flk-1 in the rats model, Shuang Dan Ming Mu and positive control groups were all lower than those in the normal group, while the mean optical density values were higher than those in the normal group. When the model group was compared to the normal group, the difference was extremely significant (P < 0.01). The mean grayscale values of VEGF-a, VEGF-b, VEGF-c and Flk-1 in the Shuang Dan Ming Mu and positive control groups were all higher than those in the model group, while the mean optical density values were lower than those in the model group (P
- Published
- 2018
47. Fructus Lycii and Salvia miltiorrhiza Bunge extract alleviate retinitis pigmentosa through Nrf2/HO-1 signaling pathway
- Author
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Yi-Jing Yang, Zhen Yao, Jun Peng, Chen Ou, Jiang Pengfei, Qing-Hua Peng, Meiyan Zeng, Ye Tian, and Houpan Song
- Subjects
Male ,NF-E2-Related Factor 2 ,Salvia miltiorrhiza ,Oxidative phosphorylation ,Pharmacology ,medicine.disease_cause ,Retina ,Superoxide dismutase ,03 medical and health sciences ,chemistry.chemical_compound ,Mice ,Random Allocation ,0302 clinical medicine ,Western blot ,Drug Discovery ,medicine ,Electroretinography ,Animals ,Outer nuclear layer ,030304 developmental biology ,chemistry.chemical_classification ,0303 health sciences ,medicine.diagnostic_test ,biology ,Plant Extracts ,Glutathione peroxidase ,Membrane Proteins ,Lycium ,Malondialdehyde ,Mice, Inbred C57BL ,Oxidative Stress ,medicine.anatomical_structure ,chemistry ,030220 oncology & carcinogenesis ,Fruit ,biology.protein ,Female ,Oxidative stress ,Biomarkers ,Heme Oxygenase-1 ,Retinitis Pigmentosa ,Drugs, Chinese Herbal - Abstract
Ethnopharmacological relevance Fructus Lycii and Salvia miltiorrhiza Bunge (FS) are popular Chinese herbs for the treatment of retinitis pigmentosa (RP). Aim of the study This study was to evaluate protective effects of FS extract on RP and to explore whether FS extract exerts its protective effects via oxidative stress by regulating Nrf2/HO-1 signaling pathway. Material and methods FS extract were identified by UPLC chromatographic analysis. Rd10 mice as the model of RP, followed by a 4-week FS extract treatment by intragastric administration. After the animal sacrifice, histopathological examination and Scotopic electroretinography (ERG) analysis were assessed. The oxidative stress markers were determined and the expression levels of Nrf2 and HO-1 mRNA were evaluated by qRT-PCR. The expression and distribution of Nrf2 and HO-1 protein were determined by Western blot and immunohistochemistry. Results The morphological changes of Outer nuclear layer (ONL) thickness and number of the ONL were observed with a significant increased, and the functional changes of a-amplitude and b-wave amplitude were measured with a markedly increased. Treatment with FS extract remarkably increased levels of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), and decreased level of malondialdehyde (MDA). Moreover, FS extract up-regulated mRNA and protein expression of Nrf2 and HO-1. Conclusions This study indicated that FS extract can improve retinal morphology and function, which may have occurred through the regulation of the Nrf2/HO-1 pathway to inhibit the oxidative reaction.
- Published
- 2021
48. Smart graphene-based hydrogel promotes recruitment and neural-like differentiation of bone marrow derived mesenchymal stem cells in rat skin
- Author
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Yan-Fen Huang, Li-Hua Peng, Chenzhen Zhang, Tie-Jun Yuan, Min-Hong Tan, and Xue-Han Xu
- Subjects
Chemokine ,Biomedical Engineering ,Bone Marrow Cells ,macromolecular substances ,02 engineering and technology ,Regenerative medicine ,03 medical and health sciences ,chemistry.chemical_compound ,stomatognathic system ,In vivo ,Bone Marrow ,medicine ,Animals ,General Materials Science ,030304 developmental biology ,0303 health sciences ,Polyethylenimine ,biology ,Chemistry ,Mesenchymal stem cell ,technology, industry, and agriculture ,Cell Differentiation ,Hydrogels ,Mesenchymal Stem Cells ,Transfection ,021001 nanoscience & nanotechnology ,Chemokine CXCL12 ,Cell biology ,Rats ,medicine.anatomical_structure ,biology.protein ,Graphite ,Bone marrow ,Stem cell ,0210 nano-technology - Abstract
Strategies to direct the differentiation of endogenous bone marrow derived mesenchymal stem cells (BMSCs) in vivo following recruitment to the injured site are critical to realizing the potential of stem cell-based therapies. But the differentiation efficiency of BMSCs remains limited without direction. Here we demonstrated a novel strategy to promote neuronal differentiation of BMSCs using cross-linked polyethylenimine (PEI) grafted graphene oxide (GO) as the enzyme responsive vector for delivering active genes to BMSCs. In vivo, a core–shell microfiber arrayed hydrogel with a chemokine (SDF-1α) and the cross-linked GO-PEI/pDNAs-bFGF microparticles incorporated into the shell and core, respectively, were constructed. The arrayed hydrogel was shown to recruit and stimulate the neural-like differentiation of BMSCs effectively by delivering the CXCL12 and GO-PEI/pDNAs-bFGF in a self-controlled manner. With this strategy, both in vitro and in vivo neuronal differentiation of BMSCs with function were accelerated significantly. The cross-linked GO-PEI mediated gene transfection together with a multi-functional microfiber arrayed hydrogel provide a translatable approach for endogenous stem cell-based regenerative therapy.
- Published
- 2021
49. Actirhodobacter atriluteus gen. nov., sp. nov., isolated from the surface water of the Yellow Sea
- Author
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Hua-Peng Xue, Chuang Liu, Dao-Feng Zhang, Jian-Ke Huang, Xiang-Ning Wang, Ai-Hua Zhang, and Lin Xu
- Subjects
0106 biological sciences ,0301 basic medicine ,DNA, Bacterial ,Stereochemistry ,Ubiquinone ,010603 evolutionary biology ,01 natural sciences ,Microbiology ,Agar plate ,03 medical and health sciences ,Genus ,RNA, Ribosomal, 16S ,Seawater ,Molecular Biology ,Phospholipids ,Phylogeny ,Base Composition ,Strain (chemistry) ,Phylogenetic tree ,Chemistry ,Fatty Acids ,Water ,General Medicine ,Sequence Analysis, DNA ,Erythrobacteraceae ,16S ribosomal RNA ,Bacterial strain ,Bacterial Typing Techniques ,030104 developmental biology ,Qipengyuania - Abstract
A Gram-stain-negative, aerobic, orange-pigmented bacterial strain, designated HHU K3-1 T, was isolated from the surface water of the Yellow Sea. The strain was observed to grow on 2216E agar medium, and growth occurred at pH 6.0–8.0 (optimum 7.0), 28–37 °C (optimum 28 °C), and in the presence of 0.5–5% (w/v) NaCl (optimum 1–3%). The major fatty acids (> 10%) were summed feature 3 (C16:1ω6c/C16:1ω7c), C17:1ω6c and summed feature 8 (C18:1ω6c/C18:1ω7c). Strain HHU K3-1 T was found to contain ubiquinone-10 as the predominant quinone and the major polar lipids were diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE), phosphatidylglycerol (PG) and sphingoglycolipid (SGL). The 16S rRNA gene sequence analysis indicated that strain HHU K3-1 T shared highest similarities with Pelagerythrobacter marensis KCTC 22370 T (97.7%) and Qipengyuania oceanensis MCCC 1A09965T (96.9%). However, a phylogenetic tree based on 288 orthologous clusters (OCs) indicated that HHU K3-1 T was close related to Parapontixanthobacter aurantiacus MCCC 1A09962T. The pairwise AAI and evolutionary distance between HHU K3-1 T and Parapontixanthobacter aurantiacus MCCC 1A09962T are 67.1% and 0.43, respectively, which meet the recently proposed standard to differentiate genera in the family Erythrobacteraceae. On the basis of the result obtained by the polyphasic taxonomic study, strain HHU K3-1 T can be considered to represent a novel genus in the family Erythrobacteraceae, for which the name Actirhodobacter atriluteus gen. nov., sp. nov. is proposed. The type strain is HHU K3-1 T (= MCCC 1K04225T = KCTC 72834 T = CGMCC 1.17395 T).
- Published
- 2021
50. Geniposide and Chlorogenic Acid Combination Improves Non-Alcoholic Fatty Liver Disease Involving the Potent Suppression of Elevated Hepatic SCD-1
- Author
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Cheng Chen, Xin Xin, Qian Liu, Hua-Jie Tian, Jing-Hua Peng, Yu Zhao, Yi-Yang Hu, and Qin Feng
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Microarray ,chlorogenic acid ,Cell ,RM1-950 ,Chronic liver disease ,geniposide ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Biosynthesis ,Chlorogenic acid ,Internal medicine ,stearoyl-CoA desaturase-1 ,medicine ,Pharmacology (medical) ,Original Research ,Pharmacology ,Chemistry ,Fatty liver ,medicine.disease ,030104 developmental biology ,Endocrinology ,medicine.anatomical_structure ,metabolic associated fatty liver disease 1 ,de novo lipogenesis ,030220 oncology & carcinogenesis ,Lipogenesis ,Therapeutics. Pharmacology ,Stearoyl-CoA desaturase-1 ,non alcoholic fatty liver disease - Abstract
Background: Non-alcoholic fatty liver disease (NAFLD), characterized by the excessive accumulation of hepatic triglycerides (TGs), has become a worldwide chronic liver disease. But efficient therapy keeps unsettled. Our previous works show that geniposide and chlorogenic acid combination (namely the GC combination), two active chemical components combined with a unique ratio (67.16:1), presents beneficial effects on high-fat diet-induced NAFLD rodent models. Notably, microarray highlighted the more than 5-fold down-regulated SCD-1 gene in the GC combination group. SCD-1 is an essential lipogenic protein for monounsaturated fatty acids’ biosynthesis and serves as a key regulatory enzyme in the last stage of hepatic de novo lipogenesis (DNL).Methods: NAFLD mice model was fed with 16 weeks high-fat diet (HFD). The pharmacological effects, primarily on hepatic TG, TC, FFA, and liver enzymes, et al. of the GC combination and two individual components were evaluated. Furthermore, hepatic SCD-1 expression was quantified with qRT-PCR, immunoblotting, and immunohistochemistry. Finally, the lentivirus-mediated over-expressed cell was carried out to confirm the GC combination’s influence on SCD-1.Results: The GC combination could significantly reduce hepatic TG, TC, and FFA in NAFLD rodents. Notably, the GC combination presented synergetic therapeutic effects, compared with two components, on normalizing murine hepatic lipid deposition and disordered liver enzymes (ALT and AST). Meanwhile, the robust SCD-1 induction induced by HFD and FFA in rodents and ALM-12 cells was profoundly blunted, and this potent suppression was recapitulated in lentivirus-mediated SCD-1 over-expressed cells.Conclusion: Taken together, our data prove that the GC combination shows a substantial and synergetic anti-lipogenesis effect in treating NAFLD, and these amelioration effects are highly associated with the potent suppressed hepatic SCD-1 and a blunted DNL process.
- Published
- 2021
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