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Correlativity study between expression of DNA double-strand break repair protein and radiosensitivity

Liang ZHUANG, Shiying YU, Xiaoyuan HUANG, Yang CAO, Huihua XIONG

《医学前沿（英文）》 2009年 第3卷 第1期   页码 26-29 doi: 10.1007/s11684-009-0008-7

摘要： DNA double-strand break (DSB) is generally regarded as the most lethal of all DNA lesions after radiation. Ku80, DNA-PK catalytic subunit (DNA-PKcs) and ataxia telangiectasia mutated (ATM) proteins are major DSB repair proteins. In this study, survival fraction at 2Gy (SF2) values of eight human tumor cell lines (including four human cervical carcinoma cell lines HeLa, SiHa, C33A, Caski, three human breast carcinoma cell lines MCF-7, MDA-MB-231, MDA-MB-453, and one human lung carcinoma cell line A549) were acquired by clone formation assay, and western blot was applied to detect the expressions of Ku80, DNA-PKcs and ATM protein. The correlativity of protein expression with SF2 value was analyzed by Pearson linear correlation analysis. We found that the expression of same protein in different cell lines and the expression of three proteins in the same cell line had a significant difference. The SF2 values were also different in eight tumor cell lines and there was a positive correlativity between the expression of DNA-PKcs and SF2 ( ＝0.723, = 0.043), but Ku80 and ATM expression had no correlation with SF2 ( >0.05). These findings suggest that the expression level of DNA-PKcs protein can be an indicator for predicting the radiosensitivity of tumor cells.

关键词： Ku80     DNA-PK(cs)-binding protein     human     ataxia telangiectasia mutated protein     tumor cell lines     radiosensitivity    

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Proteomics study of Mycoplasma pneumoniae pneumonia reveals the Fc fragment of the IgG-binding protein

《医学前沿（英文）》 2022年 第16卷 第3期   页码 378-388 doi: 10.1007/s11684-021-0840-y

摘要： Macrolide and corticosteroid resistance has been reported in patients with Mycoplasma pneumoniae (MP) pneumonia (MPP). MP clearance is difficult to achieve through antibiotic treatment in sensitive patients with severe MPP (SMPP). SMPP in children might progress to airway remodeling and even bronchiolitis/bronchitis obliterans. Therefore, identifying serum biomarkers that indicate MPP progression and exploring new targeted drugs for SMPP treatment require urgency. In this study, serum samples were collected from patients with general MPP (GMPP) and SMPP to conduct proteomics profiling. The Fc fragment of the IgG-binding protein (FCGBP) was identified as the most promising indicator of SMPP. Biological enrichment analysis indicated uncontrolled inflammation in SMPP. ELISA results proved that the FCGBP level in patients with SMPP was substantially higher than that in patients with GMPP. Furthermore, the FCGBP levels showed a decreasing trend in patients with GMPP but the opposite trend in patients with SMPP during disease progression. Connectivity map analyses identified 25 possible targeted drugs for SMPP treatment. Among them, a mechanistic target of rapamycin kinase (mTOR) inhibitor, which is a macrolide compound and a cell proliferation inhibitor, was the most promising candidate for targeting SMPP. To our knowledge, this study was the first proteomics-based characterization of patients with SMPP and GMPP.

关键词： severe Mycoplasma pneumoniae pneumonia     children     proteomics     Fc fragment of the IgG-binding protein     mechanistic target of rapamycin kinase inhibitor    

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Molecular simulation of the interaction mechanism between CodY protein and DNA in

Linchen Yuan, Hao Wu, Yue Zhao, Xiaoyu Qin, Yanni Li

《化学科学与工程前沿（英文）》 2019年 第13卷 第1期   页码 133-139 doi: 10.1007/s11705-018-1737-4

摘要： In , the global transcriptional regulatory factor CodY can interact with the promoter DNA to regulate the growth, metabolism, environmental adaptation and other biological activities of the strains. In order to study the mechanism of interaction between CodY and its target DNA, molecular docking and molecular dynamics simulations were used to explore the binding process at molecular level. Through the calculations of the free energy of binding, hydrogen bonding and energy decomposition, nine key residues of CodY were identified, corresponding to SER184, SER186, SER208, THR217, ARG218, SER219, ASN223, LYS242 and GLY243, among which SER186, ARG218 and LYS242 play a vital role in DNA binding. Our research results provide important theoretical guidance for using wet-lab methods to study and optimize the metabolic network regulated by CodY.

关键词： CodY     DNA     molecular docking     molecular dynamics    

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Atomistic characterization of binding modes and affinity of peptide inhibitors to amyloid-

Fufeng LIU,Wenjie DU,Yan SUN,Jie ZHENG,Xiaoyan DONG

《化学科学与工程前沿（英文）》 2014年 第8卷 第4期   页码 433-444 doi: 10.1007/s11705-014-1454-6

摘要： The aggregation of amyloid -protein (A ) is tightly linked to the pathogenesis of Alzheimer’s disease. Previous studies have found that three peptide inhibitors (i.e., KLVFF, VVIA, and LPFFD) can inhibit A aggregation and alleviate A -induced neurotoxicity. However, atomic details of binding modes and binding affinities between these peptide inhibitors and A have not been revealed. Here, using molecular dynamics simulations and molecular mechanics Poisson Boltzmann surface area (MM/PBSA) analysis, we examined the effect of three peptide inhibitors (KLVFF, VVIA, and LPFFD) on their sequence-specific interactions with A and the molecular basis of their inhibition. All inhibitors exhibit varied binding affinity to A , in which KLVFF has the highest binding affinity, whereas LPFFD has the least. MM/PBSA analysis further revealed that different peptide inhibitors have different modes of interaction with A , consequently hotspot binding residues, and underlying driving forces. Specific residue-based interactions between inhibitors and A were determined and compared for illustrating different binding and inhibition mechanisms. This work provides structure-based binding information for further modification and optimization of these three peptide inhibitors to enhance their binding and inhibitory abilities against A aggregation.

关键词： Alzheimer’s disease     amyloid β-protein     peptide inhibitors     protein-protein interaction     molecular dynamics simulation    

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Construction and humoral immune response of Epstein-Barr virus latent membrane protein 2 DNA vaccine

Jianqing PAN PhD, Qin ZHANG MD, Daowen WANG MD, PhD,

《医学前沿（英文）》 2009年 第3卷 第4期   页码 390-395 doi: 10.1007/s11684-009-0087-5

摘要： We constructed a eukaryotic expression plasmid encoding Epstein-Barr virus latent membrane protein 2 (EBV, LMP2) and evaluated its effects on humoral immunity. First, the encoding sequence of the EBV was amplified from B95−8 cell RNA by reverse transcription polymerase chain reaction (RT-PCR) and then was directionally cloned into eukaryotic expression vector pcDNA3.1. It was employed to evaluate immune response of the mice inoculated doubly with the DNA vaccine. The serum antibody against LMP2 was detected with enzyme-linked immunosorbent assay (ELISA). The recombinant plasmid pcDNA3.1- was confirmed by the restrictive endonuclease analysis and sequence analysis. The serum titer of IgG antibody against LMP2 epitope in the mice immunized with the DNA vaccine encoding LMP2 was up to 1∶4000. In conclusion, the EBV DNA vaccine can induce a strong humoral immune response in mice.

关键词： Epstein-Barr virus     latent membrane protein 2     nasopharyngeal carcinoma     humoral immunity    

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抗RNA病毒相关生物材料

姚康德,尹玉姬,张宝连,赵立国

《中国工程科学》 2003年 第5卷 第7期   页码 17-23

摘要：

在介绍RNA病毒结构、生殖、复制和转录的基础上，综述了抗病毒策略，其中包括抗SARS药物设计，RNA干扰，DNA疫苗释放系统，调控蛋白与糖胺聚糖衍生物或类似物相互作用，天然药物及肺泡组织工程等。这些实例涵盖了RNA病毒与蛋白质、DNA及多糖等生物材料的相互作用。生物材料作为基质或载体正在向细胞或/和基因活化的第三代生物材料发展，可望在抗病毒中发挥作用。

关键词： 抗RNA病毒     蛋白质     DNA     多糖     生物材料    

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Protein adsorption in two-dimensional electrochromatography packed with superporous and microporous cellulose

Dongmei WANG, Guodong JIA, Liang XU, Xiaoyan DONG, Yan SUN

《化学科学与工程前沿（英文）》 2009年 第3卷 第3期   页码 229-234 doi: 10.1007/s11705-009-0213-6

摘要： Anion-exchange superporous cellulose (DEAE-SC) and microporous cellulose (DEAE-MC) adsorbents were packed in an electrochromatographic column, and the effect of external electric field (eEF) on the dynamic adsorption was investigated. The column was designed to provide longitudinal, transverse or 2-dimensional (2D) eEF. It was found that the electro-kinetic effect caused by the introduction of an electric field played an important role in the dynamic adsorption of bovine serum albumin to the adsorbents. The dynamic binding capacity (DBC) in the presence of 2D eEF was higher than in the presence of a one-dimensional eEF. The effect of flow velocity on the DBC of the two adsorbents was also demonstrated. It was found that the effect of electric field on the DEAE-MC column was more remarkable than that on the DEAE-SC column at the same flow rate, whereas the DEAE-SC column showed higher DBC and adsorption efficiency (AE) than the DEAE-MC column. With increasing flow rate, the DEAE-SC column could still offer high DBC and AE in the presence of the 2D eEF. For example, a DBC of 21.4 mg/mL and an AE of 57.7% were obtained even at a flow rate as high as 900 cm/h. The results indicate that the 2D electrochromatography packed with the superporous cellulose adsorbent is promising for high-speed protein chromatography.

关键词： electrochromatography     two-dimensional electric field     dynamic binding capacity     superporous cellulose bead     protein    

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Regulation of NLR stability in plant immunity

Tao WANG, Jiaxin LI, Qian-Hua SHEN

《农业科学与工程前沿（英文）》 2019年 第6卷 第2期   页码 97-104 doi: 10.15302/J-FASE-2018248

摘要：

Plant nucleotide binding domain and leucine-rich repeat (NLR) receptors recognize pathogen effectors directly or indirectly and mediate innate immune responses. NLR-mediated immunity also has direct impacts on plant growth and development, as well as yield and survival. The levels of NLR proteins are therefore intricately controlled in plants to balance defense responses and other processes. In recent years, the ubiquitination-26S proteasome system and the HSP90 chaperones have emerged as having key functions in the regulation of NLR stability. The N-end rule pathway of protein degradation is also directly linked to NLR stability. Recent progress in the regulation of NLR stability and turnover is summarized here, focusing on the key components and pathways.

关键词： E3 ubiquitin ligase     degradation     nucleotide-binding leucine-rich repeat receptor     plant immunity     proteasome     protein stability     ubiquitination    

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用于实时皮肤创面愈合的超强工程化蛋白凝聚体黏合剂 Article

李铭, 柳柏梅, 徐炜, 赵来, 王自立, 何浩男, 李敬敬, 王帆, 马超, 刘凯, 张洪杰

《工程（英文）》 2023年 第31卷 第12期   页码 76-85 doi: 10.1016/j.eng.2023.07.013

摘要： 在嵌合蛋白和天然DNA间超分子相互作用的积极参与下，液-液相分离被很好地用来驱动生物复合黏合剂的组装，从而获得增强的黏合性能。

关键词： 生物复合黏合剂     蛋白     DNA     凝聚物     皮肤愈合    

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Effects of resistin on insulin signaling in endothelial cells

Zhizhen LI, Fangping LI, Jianhong YE, Li YAN, Zuzhi FU

《医学前沿（英文）》 2009年 第3卷 第2期   页码 136-140 doi: 10.1007/s11684-009-0029-2

摘要： The objective of this study was to investigate the effects of resistin on insulin signaling in human umbilical vein endothelial cells (HUVECs). HUVECs were incubated with recombinant human resistin (0-100 ng/mL) for 24 h. Akt and endothelial nitric oxide synthase (eNOS) phosphorylation levels of endothelial cells under basal or insulin stimulated conditions were measured by Western blot. Nitric oxide (NO) production of HUVECs was also detected. The results showed that resistin could significantly inhibit Akt and eNOS phosphorylation and NO production in endothelial cells under insulin stimulated conditions ( < 0.05 control). But under basal conditions, treatment with resistin could result in a decrease in eNOS phosphorylation ( < 0.05 control) but had no effect on NO production and Akt phosphorylation levels. These findings suggested that resistin exerted an inhibitory effect on NO production by inhibiting insulin signaling and eNOS phosphorylation in endothelial cells.

关键词： resistin     endothelium     nitric oxide     endothelial nitric oxide synthase     Akt-binding protein     mouse    

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Asymmetric transfer hydrogenation of prochiral ketone catalyzed over Fe-CS/SBA-15 catalyst

XUE Ping, WU Tao

《化学科学与工程前沿（英文）》 2007年 第1卷 第3期   页码 251-255 doi: 10.1007/s11705-007-0045-1

摘要： A heterogeneous chiral catalyst Fe(III)-CS (chitosan) complex/mesoporous molecular sieve SBA-15 (Santa Barbara Amorphous) was prepared. The asymmetric transfer hydrogenations of prochiral acetophenone and 4-methyl-2-pentanone to corresponding chiral alcohols were carried out on Fe-CS/SBA-15 at atmosphere pressure using 2-propanol as hydrogen donor. Effects of Fe content in catalyst, reaction temperature, reaction time and promoter KOH concentration on the conversion of substrates and enantioselectivity were investigated. Fe-CS/SBA-15 with 2.2% mass fraction Fe exhibits considerable enantioselectivity and catalytic activity for the asymmetric transfer hydrogenations of aromatic ketone and aliphatic ketone. Under optimal reaction conditions: KOH concentration 0.03 mol/L, reaction temperature 70ºC and reaction time 4 h, enantiomer excess (ee) of ()-1-phenylethanol and conversion of acetophenone can reach 87.4% and 27.7%, respectively. Under the above KOH concentration and reaction temperature and reaction time of 8 h, the ee of ()-4-methyl-2-pentanol and conversion 4-methyl-2-pentanone amounted to 50.2% and 25.5%, respectively.

关键词： asymmetric transfer     enantioselectivity     Fe-CS/SBA-15     aliphatic     aromatic    

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Chloride binding and time-dependent surface chloride content models for fly ash concrete

S. MUTHULINGAM,B. N. RAO

《结构与土木工程前沿（英文）》 2016年 第10卷 第1期   页码 112-120 doi: 10.1007/s11709-015-0322-x

摘要： Corrosion of embedded rebars is a classical deterioration mechanism of reinforced concrete structures exposed to chloride environments. Such environments can be attributed to the presence of seawater, deicing or sea-salts, which have high concentrations of chloride ion. Chloride ingress into concrete, essential for inducing rebar corrosion, is a complex interaction between many physical and chemical processes. The current study proposes two chloride ingress parameter models for fly ash concrete, namely: 1) surface chloride content under tidal exposure condition; and 2) chloride binding. First, inconsistencies in surface chloride content and chloride binding models reported in literature, due to them not being in line with past research studies, are pointed out. Secondly, to avoid such inconsistencies, surface chloride content and chloride binding models for fly ash concrete are proposed based upon the experimental work done by other researchers. It is observed that, proposed models are simple, consistent and in line with past research studies reported in literature.

关键词： binding isotherms     chloride ingress     concrete     fly ash     surface chloride content    

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Gradient-based compressive image fusion

Yang CHEN,Zheng QIN

《信息与电子工程前沿（英文）》 2015年 第16卷 第3期   页码 227-237 doi: 10.1631/FITEE.1400217

摘要： We present a novel image fusion scheme based on gradient and scrambled block Hadamard ensemble (SBHE) sampling for compressive sensing imaging. First, source images are compressed by compressive sensing, to facilitate the transmission of the sensor. In the fusion phase, the image gradient is calculated to reflect the abundance of its contour information. By compositing the gradient of each image, gradient-based weights are obtained, with which compressive sensing coefficients are achieved. Finally, inverse transformation is applied to the coefficients derived from fusion, and the fused image is obtained. Information entropy (IE), Xydeas’s and Piella’s metrics are applied as non-reference objective metrics to evaluate the fusion quality in line with different fusion schemes. In addition, different image fusion application scenarios are applied to explore the scenario adaptability of the proposed scheme. Simulation results demonstrate that the gradient-based scheme has the best performance, in terms of both subjective judgment and objective metrics. Furthermore, the gradient-based fusion scheme proposed in this paper can be applied in different fusion scenarios.

关键词： Compressive sensing (CS)     Image fusion     Gradient-based image fusion     CS-based image fusion    

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预腐蚀后拉伸超载对LC4CS铝合金疲劳性能的影响

蒋荟,杨晓华

《中国工程科学》 2006年 第8卷 第2期   页码 44-46

摘要：

采用预腐蚀后进行单次拉伸超载疲劳试验的方法，研究了腐蚀与超载对LC4CS材料疲劳寿命的影响。

关键词： LC4CS 铝合金     预腐蚀     超载     疲劳寿命    

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Expression status of GATA3 and mismatch repair proteins in upper tract urothelial carcinoma

Yue Wang, Jinxia Zhang, Yunfan Wang, Shufang Wang, Yu Zhang, Qi Miao, Fei Gao, Huiying He

《医学前沿（英文）》 2019年 第13卷 第6期   页码 730-740 doi: 10.1007/s11684-019-0687-7

摘要： GATA binding protein 3 (GATA3) and mismatch repair (MMR) deficiency contribute to the development of urothelial carcinoma. However, the combined expression of GATA3 and microsatellite instability (MSI) in upper tract urothelial carcinoma (UTUC) and its prognostic value have not been investigated. Here, we immunohistochemically stained GATA3 and MMR proteins in 108 UTUC samples. GATA3 was positive in 74 cases, and its expression was significantly lower than in adjacent benign urothelium ( <0.001). Loss of GATA3 expression was statistically associated with adverse clinicopathologic parameters, such as advanced stage, lymphovascular invasion, neural invasion, lymph node metastasis, and extensive necrosis. Cancer-specific survival (CSS, =0.028) and disease-free survival (DFS, =0.024) were significantly shorter in patients with GATA3 negative tumors than in patients with GATA3 positive tumors. The absence of MMR proteins was observed in 8.3% of the cases, and focal staining was identified in 13.0%. When using “lax criteria” which resulted in counting cases as negative where MMR staining was in fact focally positive (<5%), we found that GATA3 was inversely associated with MSI ( =0.005). Moreover, GATA3 /microsatellite stability (MS) tumors were correlated with advanced pT stage ( <0.001) and poor outcome ( =0.019 for CSS, =0.016 for DFS) compared with GATA3 /MSI ones. The GATA3 /MSI cases had unfavorable clinical outcomes compared with GATA3 /MSI cases ( =0.008 for CSS, =0.023 for DFS). This finding raises a question as to whether GATA3 interacts with MSI through the TGF- signaling pathway and regulates UTUC progression.

关键词： upper tract urothelial carcinoma     GATA binding protein 3     mismatch repair     microsatellite instability     prognosis    

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标题 作者 时间 类型 操作

Correlativity study between expression of DNA double-strand break repair protein and radiosensitivity

Liang ZHUANG, Shiying YU, Xiaoyuan HUANG, Yang CAO, Huihua XIONG

期刊论文

Proteomics study of Mycoplasma pneumoniae pneumonia reveals the Fc fragment of the IgG-binding protein

期刊论文

Molecular simulation of the interaction mechanism between CodY protein and DNA in

Linchen Yuan, Hao Wu, Yue Zhao, Xiaoyu Qin, Yanni Li

期刊论文

Atomistic characterization of binding modes and affinity of peptide inhibitors to amyloid-

Fufeng LIU,Wenjie DU,Yan SUN,Jie ZHENG,Xiaoyan DONG

期刊论文

Construction and humoral immune response of Epstein-Barr virus latent membrane protein 2 DNA vaccine

Jianqing PAN PhD, Qin ZHANG MD, Daowen WANG MD, PhD,

期刊论文

抗RNA病毒相关生物材料

姚康德,尹玉姬,张宝连,赵立国

期刊论文

Protein adsorption in two-dimensional electrochromatography packed with superporous and microporous cellulose

Dongmei WANG, Guodong JIA, Liang XU, Xiaoyan DONG, Yan SUN

期刊论文

Regulation of NLR stability in plant immunity

Tao WANG, Jiaxin LI, Qian-Hua SHEN

期刊论文

用于实时皮肤创面愈合的超强工程化蛋白凝聚体黏合剂

李铭, 柳柏梅, 徐炜, 赵来, 王自立, 何浩男, 李敬敬, 王帆, 马超, 刘凯, 张洪杰

期刊论文

Effects of resistin on insulin signaling in endothelial cells

Zhizhen LI, Fangping LI, Jianhong YE, Li YAN, Zuzhi FU

期刊论文

Asymmetric transfer hydrogenation of prochiral ketone catalyzed over Fe-CS/SBA-15 catalyst

XUE Ping, WU Tao

期刊论文

Chloride binding and time-dependent surface chloride content models for fly ash concrete

S. MUTHULINGAM,B. N. RAO

期刊论文

Gradient-based compressive image fusion

Yang CHEN,Zheng QIN

期刊论文

预腐蚀后拉伸超载对LC4CS铝合金疲劳性能的影响

蒋荟,杨晓华

期刊论文

Expression status of GATA3 and mismatch repair proteins in upper tract urothelial carcinoma

Yue Wang, Jinxia Zhang, Yunfan Wang, Shufang Wang, Yu Zhang, Qi Miao, Fei Gao, Huiying He

期刊论文