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Albumin-bound paclitaxel dimeric prodrug nanoparticles with tumor Qr redox heterogeneity-triggered drug release for synergistic photothermal/ chemotherapy

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Nano Research 2019年第4期12卷 877-887页

作者： Qing Pei Xiuli Hu Xiaohua zh.ng rui Xia Shi Liu zhigang Xie Xiabin Jing State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 I China University of Science and Technology of China Hefei 230026 China

In spired by the clinically approved albumin based PTX formulatio n(Abraxa ne)and high-drug-loading dimeric prodrug tactics,herein we report a theranostic HAbraxane-likeH prodrug formulation,which is comprised of human serum albumin(HSA),a paclitaxel(PTX)dimer bridged with thioether liner(PTX2-S),and photosensitizer IR780 ***(NPs)with PTX2-S and IR780 as the core and HSA as the stealth shell are *** with HSA-based PTX clinical formulation(Abraxane),the dimeric molecules not only constitute the bulk structure of the particles,but also act as crossi ng age nt,thus realizing drug loadi ng content in creasi ng from 6.6 wt.%to 48.7 wt.%with high loadi ng efficie ncy(>90%)and excellent stability in biological *** ntly,the thioether lin kage dually resp onds to the tumor redox heteroge neity and the NPs gradually releases the pare nt drug PTX for *** nwhile,PTX2-S facilitates the en capsulatio n of IR780 iodide due to their π-π stacki ng interaction and IR780 iodide gen erates spatio-temporal hyperthermia un der light irradiation to kill cancer cells for photothermal *** described craft integrates the biomimetic trait of HSA,high drug loading,tumor redox heterogeneity-initiated on-dema nd drug release,and combi nation therapy into one formulati on and the developed nan oparticles are promising for cancer treatment.

关键词： human serum albumin prodrug nanoparticles tumor redox heterogeneity-responsiveness controlled drug release synergistic cancer therapy

Role of sortase in Streptococcus mutans under the effect of nicotine

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International Journal of Oral Science 2013年第4期5卷 206-211页

作者： Ming-Yun Li rui-Jie Huang Xue-Dong zhou Richard L Gregory School of Dentistry Indiana University State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan University Department of Pathology and Laboratory Medicine School of MedicineIndiana University

Streptococcus mutans is a common Gram-positive bacterium and plays a significant role in dental caries. Tobacco and/or nicotine have documented effects on S. mutans growth and colonization. Sortase A is used by many Gram-positive bacteria, including S. mutans, to facilitate the insertion of certain cell surface proteins, containing an LPXTGX motif such as antigen 1/11. This study examined the effect of nicotine on the function of sortase A to control the physiology and growth of S. mutans using wild-type S. mutans ng8, and its isogenic sortase-defective and -complemented strains. Briefly, the strains were treated with increasing amounts of nicotine in planktonic growth, biofilm metabolism, and sucrose-induced and saliva-induced antigen I/ll-dependent biofilm formation assays. The strains exhibited no significant differences with different concentrations of nicotine in planktonic growth assays. However, they had significantly increased （P~〈 0.05） biofilm metabolic activity （2- to 3-fold increase） as the concentration of nicotine increased. Furthermore, the sortase-defective strain was more sensitive metabolically to nicotine than the wild-type or sortase-complemented strains. All strains had significantly increased sucrose-induced biofilm formation （2- to 3-fold increase） as a result of increasing concentrations of nicotine. However, the sortase-defective strain was not able to make as much sucrose- and saliva-induced biofilm as the wild-type ng8 did with increasing nicotine concentrations. These results indicated that nicotine increased metabolic activity and sucrose-induced biofilm formation. The saliva-induced biofilm formation assay and qPCR data suggested that antigen 1/11 was upregulated with nicotine but biofilm was not able to be formed as much as wild-type ng8 without functional sortase A.

关键词： dental caries metabolism nicotine sortase A Streptococcus mutans

实时荧光环介导等温扩增快速分型致泻大肠埃希氏菌方法的建立

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食品与发酵工业 2024年第6期50卷 233-240,I0005,I0006页

作者：李芮黄艳梅童晓钰山珊刘成伟谭俣宬陈芳刘道峰南昌大学公共卫生学院江西省预防医学重点实验室江西南昌330019 江西省疾病预防控制中心江西省食源性疾病诊断溯源重点实验室青年科研创新攻关团队江西南昌330029 江西业力医疗器械有限公司江西南昌330008 江西师范大学生命科学学院国家淡水鱼加工技术研发专业中心江西南昌330022

致泻大肠埃希氏菌(diarrheagenic Escherichia coli,DEC)是一种重要的食源性致病菌,该研究立足DEC目前流行率高、基层分型困难的现状,建立了快速分型5种DEC的实时荧光环介导等温扩增(loop-mediated isothermal amplification,LAMP)方法... 详细信息

致泻大肠埃希氏菌(diarrheagenic Escherichia coli,DEC)是一种重要的食源性致病菌,该研究立足DEC目前流行率高、基层分型困难的现状,建立了快速分型5种DEC的实时荧光环介导等温扩增(loop-mediated isothermal amplification,LAMP)方法。针对DEC的8段特征性毒力基因pic、aggR、lt、st、stx 1、stx2、escV、invE及大肠埃希氏菌属特异性基因uidA设计LAMP引物,优化反应体系,并对方法的分析性能及临床菌株分型效果进行了评价。结果显示,所建立的方法对pic和escV的检出限是1 ng/μL,对aggR、stx 1、invE和uidA的检出限是100 pg/μL,对lt、st和stx 2的检出限是10 pg/μL,该方法灵敏度与特异度均为100%,DEC型别间无交叉反应,对临床菌株的分型与实际结果完全一致。方法快速简便、设备要求低,借助恒温荧光读取设备可在40 min内迅速判定待检菌株是否为DEC及其致病类型,可满足各机构现场快速检测的需求。

关键词：致泻大肠埃希氏菌实时荧光环介导等温扩增快速检测毒力基因分型食品安全

顶空固相微萃取/气相色谱-质谱法测定血液中15种挥发性有机物

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分析测试学报 2024年第9期43卷 1442-1449页

作者：李昊洋张文骥韩祺瑞丁海媛于汇川罗颖超中国刑事警察学院刑事科学技术学院辽宁沈阳110854

该研究使用人工合成模拟血液标准添加溶液,采用部分因子实验、单因素实验、响应曲面法优化萃取条件,建立了顶空固相微萃取/气相色谱-质谱联用(HS-SPME/GC-MS)测定血液中常见挥发性有机物(VOCs)的分析方法。取2.0 mL血液样品,使用65μm... 详细信息

该研究使用人工合成模拟血液标准添加溶液,采用部分因子实验、单因素实验、响应曲面法优化萃取条件,建立了顶空固相微萃取/气相色谱-质谱联用(HS-SPME/GC-MS)测定血液中常见挥发性有机物(VOCs)的分析方法。取2.0 mL血液样品,使用65μm聚二甲基硅氧烷/二乙烯基苯(PDMS/DVB)萃取纤维,在萃取温度57℃,萃取时间45 min,搅拌转速1000 r/min,解吸温度280℃、解吸时间5 min、氯化钠含量为0条件下进行萃取,以内标法定量。结果表明,15种VOCs在0.4~4、4~40、40~400 ng/mL质量浓度范围内线性良好(r^(2)>0.99),方法检出限为0.03~0.1 ng/mL,定量下限为0.1~0.3 ng/mL。15种VOCs在2.0、20、200ng/mL加标水平下的平均回收率为71.1%~122%,相对标准偏差(n=6)为7.5%~16%。使用该方法测定新鲜人体血液样品和标准添加样品进行基质效应差异性评价,结果表明模拟血液和真实血液在基质效应方面无显著差异(p>0.05)。该方法线性范围广、检出限和定量下限低、前处理方便、检测门槛低,适用于血液中多种VOCs的检测。

关键词：响应曲面法顶空固相微萃取气相色谱-质谱联用挥发性有机物血液

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Basal Serum Anti-Miillerian Hormone Level as a Predictor of Clinical Outcomes in Freezing-all Embryo Transfer Program

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Current Medical Science 2018年第5期38卷 861-867页

作者： Xiao-lan LI rui HUAng Cong FAng Xiao-yan LIAng Reproductive Medicine Research Center Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655China

As a novel biomarker,there is inconsistent evidence regarding the association between anti-Miillerian hormone (AMH) and live birth rate in freezing-all embryo transfer *** aim to assess the prognostic effect of baseline AMH on clinical outcomes,especially live birth rate in freezing-all embryo transfer cycles.A total of 828 non-polycystic ovary patients that underwent their first frozen-thawed embryo transfers in our center between January 2010 and January 2015 were recruited in this retrospective *** were stratified into three groups based on their baseline AMH concentration:low AMH group (ng/mL),middle AMH group (1.4-5.8 ng/mL)and high AMH group (>5.8 ng/mL).The results showed that low AMH level was associated With adverse clinical *** differences in implantation rate (21.9% vs.43.2% vs.58.8%,Png the three groups were statistically *** adjusting confounders (***,baseline FSH level,AFC,endometrium thickness,endometriurn preparation protocols,number of embryos transferred,etiologies of infertility),differences in live birth rate,clinical pregnancy rate and implantation rate between groups remained *** further age subgroup analysis demonstrated that low AMH concentration was significantly associated with poor outcomes both in young and advanced *** area under the curve for serum AMH,age,AFC and FSH were 0.635,0.634,0.615 and 0.543 respectively,for predicting live *** conclusion, baseline AMH was an independent prognostic factor of live birth rate of freezing-all embryo transfers,but its predictive value on live birth rate was of limited clinical value.

关键词： anti-Miillerian hormone freezing-all embryo transfer live birth rate

足月分娩妊娠期糖尿病母亲新生儿脐血糖化血红蛋白糖化白蛋白和胰岛素样生长因子-1水平变化及意义

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山西医药杂志 2024年第7期53卷 509-513页

作者：李锐李波罗会涛鲁巧珍上海华东师范大学附属妇幼保健院上海200051 上海市长宁区妇幼保健院新生儿科上海200051

目的分析足月分娩妊娠期糖尿病(GDM)母亲新生儿脐血糖化血红蛋白(HbA1c)、糖化白蛋白(GA)和胰岛素样生长因子-1(IGF-1)水平与新生儿不良妊娠结局的相关性。方法选取2019年2月至2022年2月收治的220例足月分娩GDM母亲新生儿为观察对象,... 详细信息

目的分析足月分娩妊娠期糖尿病(GDM)母亲新生儿脐血糖化血红蛋白(HbA1c)、糖化白蛋白(GA)和胰岛素样生长因子-1(IGF-1)水平与新生儿不良妊娠结局的相关性。方法选取2019年2月至2022年2月收治的220例足月分娩GDM母亲新生儿为观察对象,根据妊娠结局分为妊娠结局良好组159例、妊娠结局不良组61例。比较妊娠结局良好组和妊娠结局不良组的临床资料,检测妊娠结局良好组和妊娠结局不良组新生儿的脐血HbA1c、GA、IGF-1水平,采用Spearman相关分析法分析脐血HbA1c、GA和IGF-1水平与新生儿不良妊娠结局的关系,采用受试者工作曲线(ROC)分析脐血HbA1c、GA和IGF-1水平预测新生儿不良妊娠结局的价值。结果妊娠结局不良组母亲空腹血糖[(6.68±0.61)mmol/L]、母亲口服葡萄糖耐量试验(OGTT)后1 h血糖[(12.54±1.12)mmol/L]、2 h血糖[(10.35±0.91)mmol/L]均高于妊娠结局良好组[(5.43±0.26)mmol/L、(11.38±1.03)mmol/L、(9.26±0.64)mmol/L](t=21.330、7.297、9.991,均Png/ml]水平均高于妊娠结局良好组(5.25±0.32)%、(12.27±0.52)%、(59.13±5.04)ng/ml (t=30.161、65.977、21.187,均P<0.05)。脐血HbA1c、GA和IGF-1水平与新生儿低血糖、新生儿窒息、胎儿窘迫、羊水过多、巨大儿呈正相关(均P<0.05)。受试者工作特征(ROC)曲线分析结果显示,HbA1c、GA、IGF-1单独预测新生儿不良妊娠结局的曲线下面积(AUC)分别为0.832、0.806、0.812,对新生儿不良妊娠结局均有一定预测价值(均P<0.05),且以3项联合检测(AUC=0.935)的预测价值优于单一指标(P<0.05)。结论足月分娩GDM母亲新生儿脐血HbA1c、GA、IGF-1水平与新生儿不良妊娠结局存在相关性,其水平升高时更易出现新生儿不良妊娠结局,检测脐血HbA1c、GA、IGF-1水平对预测新生儿不良妊娠结局具有一定的价值。

关键词：足月分娩糖尿病妊娠糖基化血红蛋白A 白蛋白类妊娠结局

Pollution characteristics and health risk assessment of polycyclic aromatic hydrocarbons and nitrated polycyclic aromatic hydrocarbons during heating season in Beijing

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Journal of Environmental Sciences 2023年第1期123卷 169-182页

作者： Xurong Bai Jie Wei Yanqin Ren rui Gao Fahe Chai Hong Li Fei Xu Yuxue Kong State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Shandong University Environment Research InstituteQingdao 266237China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Polycyclic aromatic hydrocarbons(PAHs)and their nitrated derivatives(NPAHs)attract continuous attention due to their outstanding carcinogenicity and *** order to investigate the diurnal variations,sources,formation mechanism,and health risk assessment of them in heating season,particulate matter(PM)were collected in Beijing urban area from December 26,2017 to January 17,*** and NPAHs in PM were quantitatively analyzed via gas chromatography-mass spectrometry(GC-MS).Average daily concentrations of PAHs and NPAHs were(78±54)ng/m^(3)and(783±684)pg/m^(3),*** concentrations of them were significantly higher at nighttime than at daytime,and NPAHs concentrations were 1-2 orders of magnitude lower than PAHs *** the heating season,the dominant species of PAHs include benzo[b]fluoranthene,fluoranthene,pyrene,and chrysene,while 9-nitroanthracene,2+3-nitrofluoranthene,and 2-nitropyrene were dominant species for *** were found to have a single peak during heating and to be primarily distributed in the 0.4-0.7μm particle *** emissions such as biomass burning,coal combustion,and traffic emissions were the major sources of *** were produced by the primary source of vehicle emissions and the secondary reaction triggered by OH radicals,as well as biomass burning during *** to the health risk assessment,the total carcinogenic risk was higher in adults than in *** upon oral ingestion,the carcinogenic risk in children was higher than that of adults,but the risk of adults was higher than children through skin contact and respiratory inhalation.

关键词： Heating season Polycyclic aromatic hydrocarbons Nitrated polycyclic aromatic hydrocarbons Pollution characteristics Source Health risk assessment

外周血PTH、CRP表达水平对缺血性脑卒中患者预后的评估价值

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分子诊断与治疗杂志 2024年第7期16卷 1324-1327页

作者：张翠云么蕊陈宏刘雅男秦皇岛市工人医院神经内科河北秦皇岛066200 秦皇岛市工人医院检验科河北秦皇岛066200

目的探究外周血甲状旁腺激素(PTH)、C反应蛋白(CRP)表达水平对缺血性脑卒中患者预后的评估价值。方法以2018年6月至2021年12月秦皇岛市工人医院116例缺血性脑卒中患者为研究对象,根据脑梗死面积将其分为腔隙梗死(49例)、小梗死(44例)... 详细信息

目的探究外周血甲状旁腺激素(PTH)、C反应蛋白(CRP)表达水平对缺血性脑卒中患者预后的评估价值。方法以2018年6月至2021年12月秦皇岛市工人医院116例缺血性脑卒中患者为研究对象,根据脑梗死面积将其分为腔隙梗死(49例)、小梗死(44例)及大梗死(23例),比较不同梗死面积患者外周血PTH、CRP水平,分析其与梗死面积的相关性;根据发病3个月后的改良Rankin量表(mRS)评分将患者分为预后良好组(≤2分)及预后不良组(>2分),分析外周血PTH、CRP水平对患者预后的预测价值及与不良预后发生的关系。结果三组患者PTH、CRP水平比较,大梗死组患者>小梗死组患者>腔隙梗死组患者,差异有统计学意义(Png/L、CRP≥8.16 mg/L提示缺血性脑卒中患者预后不良(P<0.05)。结论缺血性脑卒中患者外周血PTH、CRP水平与梗死面积相关,两者联合检测对患者预后具有评估价值。

关键词：甲状旁腺激素 C反应蛋白缺血性脑卒中

Production and emission of phosphine gas from wetland ecosystems

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Journal of Environmental Sciences 2010年第9期22卷 1309-1311页

作者： Chao Han Xueyuan Gu Jinju Geng Yuning Hong rui zh.ng Xiaorong Wang Shixiang Gao State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China School of Chemistry and Environmental Science Nanjing Normal University Nanjing 210097 China

Phosphine is a part of an atmospheric link of phosphorus cycle on earth, which could be an important pathway for phosphorus transport in environment. Wetland ecosystems are important locations for global biogeochemical phosphorus cycle. In this study, production and emission fluxes of free phosphine from four wetlands types in southern China were observed in different seasons. The results showed that the concentration of phosphine liberated from wetlands was at pg/m^3·ng/m^3 level. The emission concentrations of different wetlands followed the sequence： paddy field （51.83 ± 3.06） ng/m^3 〉/marsh （46.54 ± 20.55） ng/m^3 〉 lake （37.05 ± 22.74） ng/m^3 〉〉 coastal wetland （1.71 ± 0.73） ng/m^3, the positive phosphine emission flux occurred in rice paddy field （6.67 ± 5.18） ng/（m^***） and marsh （6.23 ± 26.9） ng/（m^***）, while a negative phosphine flux of （-13.11 ± 35.04） ng/（m^***） was observed on the water-air interface of Lake Taihu, suggesting that paddy field and marsh may be important sources for phosphine gas in atmosphere, while lake may be a sink of atmospheric phosphine gas during the sampling period. Atmospheric phosphine levels and emission flux from Yancheng marsh and rice paddy field varied in different seasons and vegetational zones. Both diffusion resistance in aqueous phase and temperature were dominating factors for the production and transportation of phosphine to atmosphere.

关键词： phosphine flux wetland ecosystems