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GAS6-AS1调节miR-370-3p/SPATA2轴对卵巢癌细胞增殖、迁移、侵袭、凋亡和EMT的影响
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作者 贾奕娟 王中显 +1 位作者 王冬花 龚世雄 《现代肿瘤医学》 CAS 2024年第3期424-431,共8页
目的:探讨长链非编码RNA GAS6反义RNA1(long non-coding RNA GAS6 antisense RNA1, lncRNA GAS6-AS1)调节miR-370-3p/精子发生相关蛋白2 (spermatogenesis-associated protein 2, SPATA2)轴对卵巢癌细胞增殖、迁移、侵袭、凋亡和上皮间... 目的:探讨长链非编码RNA GAS6反义RNA1(long non-coding RNA GAS6 antisense RNA1, lncRNA GAS6-AS1)调节miR-370-3p/精子发生相关蛋白2 (spermatogenesis-associated protein 2, SPATA2)轴对卵巢癌细胞增殖、迁移、侵袭、凋亡和上皮间质转化(epithelial mesenchymal transformation, EMT)的影响。方法:qRT-PCR、Western blot分别检测癌旁组织、卵巢癌组织、人正常卵巢上皮细胞IOSE80及卵巢癌细胞系HO-8910、SKOV3、A2780中GAS6-AS1、miR-370-3p及SPATA2蛋白表达。将SKOV3细胞分为:对照组(NC组)、 si-NC组、si-GAS6-AS1组、mimic NC组、miR-370-3p mimic组、si-GAS6-AS1+inhibitor NC组、si-GAS6-AS1+miR-370-3p inhibitor组,qRT-PCR检测细胞中GAS6-AS1、miR-370-3p表达;CCK-8法检测细胞增殖;流式细胞术检测细胞凋亡;划痕愈合实验检测细胞迁移;Transwell实验检测细胞侵袭;Western blot检测SPATA2、细胞周期素D1(CyclinD1)、Bcl-2相关X蛋白(Bcl-2-associated X,Bax)、E-钙黏蛋白(E-cadherin)、波形蛋白(Vimentin)、神经钙黏蛋白(N-cadherin)表达;双荧光素酶报告基因实验检测GAS6-AS1与miR-370-3p、 miR-370-3p与SPATA2的关系。结果:在卵巢癌组织和细胞中GAS6-AS1、SPATA2蛋白高表达,miR-370-3p低表达,且在SKOV3细胞中GAS6-AS1、SPATA2蛋白表达量最高,miR-370-3p表达水平最低,因此,选择SKOV3细胞为后续研究对象。与NC组、si-NC组比较,si-GAS6-AS1组GAS6-AS1、OD450值(24 h、48 h、72 h)、划痕愈合率、侵袭细胞数、SPATA2、CyclinD1、Vimentin、N-cadherin蛋白表达降低,miR-370-3p表达、细胞凋亡率、Bax、E-cadherin蛋白表达升高(P<0.05);与NC组、mimic NC组比较,miR-370-3p mimic组OD450值(24 h、48 h、72 h)、划痕愈合率、侵袭细胞数、SPATA2、CyclinD1、Vimentin、N-cadherin蛋白表达降低,miR-370-3p表达、细胞凋亡率、Bax、E-cadherin蛋白表达升高(P<0.05);miR-370-3p inhibitor减弱了沉默GAS6-AS1对SKOV3细胞增殖、迁移、侵袭及EMT的抑制及对细胞凋亡的促进作用。GAS6-AS1与miR-370-3p、miR-370-3p与SPATA2存在靶向调控关系。结论:沉默GAS6-AS1通过上调miR-370-3p来抑制SPATA2表达,从而抑制SKOV3细胞增殖、迁移、侵袭及EMT,并促进细胞凋亡。 展开更多
关键词 长链非编码RNA gas6反义RNA1 miR-370-3p 精子发生相关蛋白2 卵巢癌 上皮间质转化
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lncRNA GAS5调控miR-452-5p/Mcl-1通路对急性肺损伤大鼠肺组织细胞焦亡的影响
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作者 柯有力 罗东 +1 位作者 刘旭 别磊 《华中科技大学学报(医学版)》 CAS CSCD 北大核心 2024年第5期621-628,共8页
目的探讨长链非编码RNA生长抑制特异因子5(lncRNA GAS5)调控miR-452-5p/髓样细胞白血病序列-1(Mcl-1)通路对急性肺损伤(ALI)大鼠肺组织细胞焦亡的影响。方法取SD大鼠随机分成6组(每组10只):对照组、模型组、pUC57-lncRNA GAS5组、miR-45... 目的探讨长链非编码RNA生长抑制特异因子5(lncRNA GAS5)调控miR-452-5p/髓样细胞白血病序列-1(Mcl-1)通路对急性肺损伤(ALI)大鼠肺组织细胞焦亡的影响。方法取SD大鼠随机分成6组(每组10只):对照组、模型组、pUC57-lncRNA GAS5组、miR-452-5p抑制剂组、pUC57-NC+miR-452-5p-NC组、pUC57-lncRNA GAS5+miR-452-5p激活剂组。模型组和各干预组大鼠以腹腔注射脂多糖的方法构建ALI模型,对照组大鼠腹腔注射等量生理盐水,造模同时进行分组干预。然后检测大鼠肺功能,比较各组用力肺活量(FVC)、0.3秒用力呼气容积(FEV0.3)/FVC、潮气量(VT);HE染色观察大鼠肺组织病理损伤,并以Holfbauer评分评估其损伤程度;酶联免疫吸附法(ELISA)测定大鼠肺泡灌洗液(BALF)和血清炎症因子白细胞介素(IL)-18、IL-1β水平;免疫印迹法检测大鼠肺组织焦亡相关指标[消皮素D(GSDMD)、核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)、天冬氨酸特异性半胱氨酸蛋白酶(Caspase)-1、Caspase-11]及Mcl-1蛋白表达;实时荧光定量PCR检测大鼠肺组织lncRNA GAS5、miR-452-5p及Mcl-1表达;双荧光素酶报告基因实验验证大鼠肺泡上皮细胞L2中lncRNA GAS5对miR-452-5p的靶向调节。结果与对照组比较,模型组大鼠FVC、FEV0.3/FVC、lncRNA GAS5表达、Mcl-1蛋白及mRNA表达降低(均P<0.05),VT、Holfbauer评分、IL-18及IL-1β水平、GSDMD、NLRP3、Caspase-1及Caspase-11蛋白表达、miR-452-5p表达升高(均P<0.05)。与模型组比较,pUC57-lncRNA GAS5组、miR-452-5p抑制剂组大鼠FVC、FEV0.3/FVC、Mcl-1蛋白及mRNA表达均升高(均P<0.05),VT、Holfbauer评分、IL-18及IL-1β水平、GSDMD、NLRP3、Caspase-1及Caspase-11蛋白表达、miR-452-5p表达均降低(均P<0.05);pUC57-NC+miR-452-5p-NC组大鼠各指标无显著差异(均P>0.05)。与pUC57-lncRNA GAS5组比较,pUC57-lncRNA GAS5+miR-452-5p激活剂组大鼠FVC、FEV0.3/FVC、Mcl-1蛋白及mRNA表达降低(均P<0.05),VT、Holfbauer评分、IL-18及IL-1β水平、GSDMD、NLRP3、Caspase-1及Caspase-11蛋白表达、miR-452-5p表达升高(均P<0.05)。结论lncRNA GAS5可通过靶向下调miR-452-5p而促进Mcl-1表达,进而抑制ALI大鼠炎症反应及肺组织细胞焦亡,最终减轻大鼠肺损伤并改善其肺功能。 展开更多
关键词 lncRNA gas5 miR-452-5p/Mcl-1通路 急性肺损伤 肺组织细胞焦亡
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LncRNA GAS5通过miR-182-5p/FOXF2轴对口腔鳞状细胞癌细胞增殖、凋亡、迁移及侵袭的影响
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作者 张宗敏 那思家 郭治辰 《贵州医科大学学报》 CAS 2024年第8期1160-1169,共10页
目的探讨长链非编码RNA生长停滞特异性转录本5(LncRNA GAS5)调节微小RNA-182-5p(miR-182-5p)/叉头盒蛋白F2(FOXF2)对口腔鳞状细胞癌(OSCC)细胞增殖、迁移、侵袭及凋亡的影响。方法收集45例确诊为OSCC的癌组织以及癌旁组织,体外培养人口... 目的探讨长链非编码RNA生长停滞特异性转录本5(LncRNA GAS5)调节微小RNA-182-5p(miR-182-5p)/叉头盒蛋白F2(FOXF2)对口腔鳞状细胞癌(OSCC)细胞增殖、迁移、侵袭及凋亡的影响。方法收集45例确诊为OSCC的癌组织以及癌旁组织,体外培养人口腔上皮细胞系HOEC及人OSCC细胞系CAL-27、HSC-3、SCC-25,qRT-PCR检测组织、细胞中LncRNA GAS5、miR-182-5p、FOXF2的表达;择细胞株CAL-27分为ctrl组、pcDNA组、pcDNA-GAS5组、pcDNA-GAS5+miR-NC组及pcDNA-GAS5+miR-182-5p mimics组,采用CCK-8试剂盒检测细胞增殖活性,Transwell实验检测细胞迁移和侵袭能力,流式细胞术检测细胞凋亡水平,Western Blot检测癌细胞中FOXF2、bax、Bcl-2、cleaved caspase-3及E-cadherin蛋白表达,双萤光素酶报告实验验证miR-182-5p与LncRNA GAS5、FOXF2的关系。结果与癌旁组织相比,OSCC组织中LncRNA GAS5、FOXF2 mRNA表达降低,miR-182-5p表达升高(P<0.05);CAL-27、HSC-3、SCC-25细胞与HOEC相比,LncRNA GAS5、miR-182-5p、FOXF2表达趋势与OSCC组织内一致,且在CAL-27表达最明显,选择其作为后续实验的细胞株;与ctrl组、pcDNA组比较,pcDNA-GAS5组CAL-27细胞中GAS5、FOXF2 mRNA、细胞凋亡率及BAX、E-cadherin蛋白表达升高(P<0.05),miR-182-5p表达、细胞增殖、迁移和侵袭数及Bcl-2蛋白表达降低(P<0.05);上调miR-182-5p可减弱过表达LncRNA GAS5对CAL-27细胞增殖、迁移和侵袭的抑制作用,也可抑制癌细胞凋亡;LncRNA GAS5靶向负调控miR-182-5p表达,miR-182-5p靶向负调控FOXF2表达。结论上调GAS5可能通过抑制miR-182-5p来增加FOXF2表达,进而抑制CAL-27细胞增殖、迁移及侵袭,促进CAL-27细胞的凋亡。 展开更多
关键词 长链非编码RNA gas5 miR-182-5p 叉头盒蛋白F2 口腔鳞癌 细胞增殖 凋亡 迁移和侵袭
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Recovery of Hydrogen from Ammonia Plant Tail Gas by Absorption-Hydration Hybrid Method 被引量:5
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作者 刘蓓 王秀林 +3 位作者 唐绪龙 杨兰英 孙长宇 陈光进 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第5期784-791,共8页
In this work, the absorption-hydration hybrid method was used to recover (hydrogen + nitrogen) from (hydrogen + nitrogen + methane + argon) tail gas mixtures of synthetic ammonia plant through hydrate formatio... In this work, the absorption-hydration hybrid method was used to recover (hydrogen + nitrogen) from (hydrogen + nitrogen + methane + argon) tail gas mixtures of synthetic ammonia plant through hydrate formation/dissociation. A high-pressure reactor with magnetic stirrer was used to study the separation efficiency. The in-fluences of the concentration of anti-agglomerant, temperature, pressure, initial gas-liquid volume ratio, and oil-water volume ratio on the separation efficiency were systematically investigated in the presence of tetrahydro-furan (THF). Anti-agglomerant was used to disperse hydrate particles into the condensate phase for water-in-oil emulsion system. Since nitrogen is the material for ammonia production, the objective production in our separation process is (hydrogen + nitrogen). Our experimental results show that by adopting appropriate operating conditions, high concentration of (hydrogen + nitrogen) can be obtained using the proposed technology based on forming hydrate. 展开更多
关键词 SEPARATION HYDRATE HYDROGEN synthetic ammonia plant tail gas
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Numerical Calculation of a 3000MWt MHD-steam Combined Cycel System with Tail Gasification 被引量:1
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作者 卢艳霞 《High Technology Letters》 EI CAS 2000年第3期86-90,共5页
A numerical calculation of a 3000MWt MHD steam combined cycle system with tail gasification is described . The research scheme has been set up and the parameters of this system have been designed. Then the efficiency ... A numerical calculation of a 3000MWt MHD steam combined cycle system with tail gasification is described . The research scheme has been set up and the parameters of this system have been designed. Then the efficiency of the combined cycle system has been calculated which is up to 53.9%. 展开更多
关键词 MHD power generation gasIFICATION with tail gas COMBINED cycle SYSTEM
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Gas cyclone-liquid jet absorption separator used for treatment of tail gas containing HCl in titanium dioxide industry
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作者 Liwang Wang Hualin Wang +2 位作者 Liang Ma Zhanghuang Yang Erwen Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第4期435-446,共12页
In the titanium dioxide industry,there is a lack of a low-cost and high-efficiency treatment method for chloride containing tail gas.In this paper,the removal of HCl from the titanium dioxide industry by gas cyclone-l... In the titanium dioxide industry,there is a lack of a low-cost and high-efficiency treatment method for chloride containing tail gas.In this paper,the removal of HCl from the titanium dioxide industry by gas cyclone-liquid jet separator was studied,while Ca(OH)_(2),Na_(2)CO_(3),NaOH solution,and water were used as absorbents.This paper investigated the influence of gas cyclone-liquid jet separator’s various process parameters on the removal rate of hydrogen chloride gas.The mechanism of mass transfer in the process of removing hydrogen chloride was discussed,and the effect and feasibility of HCl gas removal in the gas cyclone-liquid jet absorption separator were studied.The results showd that the removal efficiency of hydrogen chloride maintained above 95%,up to 99.9%,and the total mass transfer coefficient reached0.28 mol·m^(-3)·s^(-1)·k Pa^(-1).Under the same conditions,the absorption effect and total mass transfer coefficient of weak basic absorption liquid can be greatly improved by increasing the flow rate of absorption liquid,but the absorption effect and total mass transfer coefficient of strong alkaline absorption liquid can’t be improved obviously.The larger the inlet gas volume,the higher the gas concentration,the lower the absorption efficiency and the lower the total volumetric mass transfer coefficient. 展开更多
关键词 Wet dechlorination HCL tail gas gas cyclone-liquid jet absorption SEPARATOR Titanium dioxide industry
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中药复方清化饮对慢性萎缩性胃炎大鼠血清IL-10、NO、GAS及血浆MTL的影响 被引量:23
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作者 黄铭涵 王文荣 +8 位作者 黄健 钟国栋 许赋瑜 李思汉 林建龙 王鑫 林秀明 黄恒青 林平 《西安交通大学学报(医学版)》 CAS CSCD 北大核心 2018年第1期116-120,共5页
目的探讨中药复方清化饮对大鼠慢性萎缩性胃炎(CAG)胃黏膜病理与血清白细胞介素-10(IL-10)、一氧化氮(NO)、胃泌素(GAS)及血浆胃动素(MTL)的影响。方法将53只Wistar大鼠随机分为空白组8只和CAG造模组45只,予建立病证结合CAG大鼠模型。... 目的探讨中药复方清化饮对大鼠慢性萎缩性胃炎(CAG)胃黏膜病理与血清白细胞介素-10(IL-10)、一氧化氮(NO)、胃泌素(GAS)及血浆胃动素(MTL)的影响。方法将53只Wistar大鼠随机分为空白组8只和CAG造模组45只,予建立病证结合CAG大鼠模型。抽检大鼠确认造模成功后,将CAG造模组余下40只大鼠随机分为模型组、维酶素组、中药低、中、高剂量组各8只。予相应药物干预30d后处死大鼠,腹主动脉取血并留取胃组织,分析各组大鼠胃黏膜病理与血清IL-10、NO、GAS及血浆MTL浓度。结果与空白组比较,模型组大鼠见不同程度的胃黏膜萎缩,血清IL-10、GAS浓度降低,血清NO、血浆MTL含量升高(P<0.01)。与模型组比较,清化饮可不同程度改善胃黏膜病理情况,升高血清IL-10、GAS浓度,降低血清NO、血浆MTL含量(P<0.05或P<0.01),且高剂量组疗效更为显著(P<0.01)。结论中药复方清化饮可调控血清IL-10、NO、GAS及血浆MTL的表达失衡,有效逆转CAG大鼠胃黏膜病变。 展开更多
关键词 清化饮 慢性萎缩性胃炎 胃黏膜病理 血清白细胞介素-10(IL-10) 血清一氧化氮(NO) 血清胃泌素(gas) 血浆胃动素(MTL) 大鼠
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幽门螺杆菌相关性消化道疾病血清IL-8,TNF-α和Gas测定及其临床意义 被引量:1
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作者 曹剑凡 马云宝 高雷华 《放射免疫学杂志》 CAS 2003年第4期208-210,共3页
目的 :探讨HP感染慢性胃炎及十二指肠溃疡患者血清IL - 8、TNF -α及Gas水平变化与其发病的关系。方法 :选择1 4C -尿素呼气试验阳性及胃镜和病理组织学确诊的 35例慢性胃炎及 30例十二指肠溃疡患者 ,皆采用放射免疫分析测定其血清IL - ... 目的 :探讨HP感染慢性胃炎及十二指肠溃疡患者血清IL - 8、TNF -α及Gas水平变化与其发病的关系。方法 :选择1 4C -尿素呼气试验阳性及胃镜和病理组织学确诊的 35例慢性胃炎及 30例十二指肠溃疡患者 ,皆采用放射免疫分析测定其血清IL - 8、TNF -α及Gas水平。结果 :慢性胃炎组血清IL - 8、TNF -α及Gas均显著高于正常对照组 ,其血清IL - 8及Gas水平与对照组比较差异极显著 (p <0 0 1)。TNF -α与对照组比较也具统计学意义 (p <0 0 5 )。十二指肠溃疡组则三项指标均极显著高于正常对照组 (p <0 0 1)。两组间比较三项指标亦均呈极显著差异 (p <0 0 1)。结论 :HP感染的慢性胃炎及十二指肠溃疡患者三项指标均呈显著变化 ,证实两种消化系疾病的发生、发展与HP感染密切相关。 展开更多
关键词 幽门螺杆菌相关性消化道疾病 血清 IL-8 TNF-Α gas 测定 临床意义 白细胞介素-8 肿瘤坏死因子-α 胃泌素
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人β-酪蛋白GAS基序荧光素酶报告基因载体的构建与鉴定
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作者 员月明 李弘剑 《生物技术通报》 CAS CSCD 北大核心 2011年第10期126-129,共4页
构建人β-酪蛋白GAS基序荧光素酶报告基因表达载体。合成3个连续重复的人β-酪蛋白启动子中干扰素γ活化序列(gamma-activated sequence,GAS)并将其克隆至pGL3-Promoter荧光素酶报告基因载体。测序鉴定构建的载体,然后将其转染入人胚肺... 构建人β-酪蛋白GAS基序荧光素酶报告基因表达载体。合成3个连续重复的人β-酪蛋白启动子中干扰素γ活化序列(gamma-activated sequence,GAS)并将其克隆至pGL3-Promoter荧光素酶报告基因载体。测序鉴定构建的载体,然后将其转染入人胚肺成纤维细胞(human embryonic lung fibroblasts,HELF)中检测荧光素酶的表达活性。测序结果表明,3×GAS序列正确;双报告基因系统检测荧光素酶活性表明,构建的报告基因具有启动子活性。成功构建的人β-酪蛋白GAS基序荧光素酶报告基因表达载体,为进一步研究干扰素γ诱导的JAK-STAT信号通路提供了必要的试验材料。 展开更多
关键词 Β-酪蛋白 gas基序 荧光素酶 报告基因
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GAS5靶向miR-222-3p对牙周膜干细胞成骨分化的影响机制 被引量:2
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作者 郭烨 马庆云 +1 位作者 赵文丽 段风 《实用口腔医学杂志》 CAS CSCD 北大核心 2021年第2期271-274,共4页
成骨诱导hPDLSCs后,茜素红染色显示矿化增强GAS5表达升高(P<0.05),Runx2、ALP和OCN mRNA表达降低,miR-222-3p表达升高(P<0.05);miR-222-3p抑制剂可逆转GAS5低表达对hPDLSCs的作用(P<0.05)。提示hPDLSCs成骨分化后GAS5表达上调... 成骨诱导hPDLSCs后,茜素红染色显示矿化增强GAS5表达升高(P<0.05),Runx2、ALP和OCN mRNA表达降低,miR-222-3p表达升高(P<0.05);miR-222-3p抑制剂可逆转GAS5低表达对hPDLSCs的作用(P<0.05)。提示hPDLSCs成骨分化后GAS5表达上调,下调GAS5可通过靶向调控miR-222-3p,抑制hPDLSCs成骨分化。 展开更多
关键词 牙周膜干细胞 gas5 成骨分化 miR-222-3p
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长链非编码RNA NEAT1通过miR-34a靶向GAS1激活PI3K-AKT信号通路对宫颈癌的增殖、侵袭和上皮细胞-间充质转化的影响研究 被引量:3
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作者 刘莹 谢锦霞 李恒 《中国性科学》 2021年第5期59-63,共5页
目的探讨长链非编码RNA(lncRNA)NEAT1对宫颈癌细胞增殖、侵袭和上皮细胞-间充质转化(EMT)的影响和机制研究。方法选取2019年10月购自上海生物细胞研究所的宫颈癌细胞株(Hela细胞)和人宫颈上皮永生化细胞株(H8细胞)作为研究对象。通过实... 目的探讨长链非编码RNA(lncRNA)NEAT1对宫颈癌细胞增殖、侵袭和上皮细胞-间充质转化(EMT)的影响和机制研究。方法选取2019年10月购自上海生物细胞研究所的宫颈癌细胞株(Hela细胞)和人宫颈上皮永生化细胞株(H8细胞)作为研究对象。通过实时荧光定量聚合酶链反应(RT-qPCR)检测NEAT1在Hela细胞和H8细胞中的差异表达,分析NEAT1对Hela细胞增殖、侵袭和EMT的影响。miRanda和双荧光素酶报告基因实验分析NEAT1和miR-34a之间的关系,检测NEAT1通过miR-34a对Hela细胞增殖、侵袭与EMT的影响,TargetScan和双荧光素酶报告基因实验分析miR-34a和GAS1的关系,检测miR-34靶向GAS1激活PI3K-AKT信号通路对Hela细胞增殖、侵袭和EMT的影响。分别用MTT、细胞侵袭实验和Western blot检测细胞的增殖、侵袭和EMT能力。结果 Hela细胞中NEAT1的表达上调(P<0.01),miR-34a表达下调(P<0.01),敲低NEAT1抑制了Hela细胞增殖、侵袭与EMT,NEAT1 3′UTR与miR-34a特异性结合。同时敲低NEAT1和miR-34a的表达,NEAT1表达的下调能部分逆转miR-34a下调对细胞功能的影响。同时过表达NEAT1和miR-34a, NEAT1能部分逆转miR-34a上调对细胞功能的影响。miR-34a和GAS13′UTR特异性结合,敲低GAS1抑制了Hela细胞增殖、侵袭与EMT,干扰GAS1抑制了Hela细胞p-PI3K、p-AKT蛋白的表达。和干扰miR-34a相比,同时抑制GAS1和miR-34a的表达能够逆转p-PI3K、p-AKT蛋白的上升。MK2206抑制了Hela细胞增殖、侵袭与EMT,而IGF-1促进了细胞的增殖、侵袭与EMT。结论 NEAT1通过miR-34a靶向GAS1激活了PI3K-AKT信号通路,从而促进宫颈癌的发展。 展开更多
关键词 NEAT1 MIR-34A gas1 PI3K-AKT 宫颈癌 上皮细胞-间充质转化
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LncRNA GAS5通过TIMP-3启动子甲基化促进软骨胶原蛋白降解的实验研究 被引量:5
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作者 何小文 丁徐 +3 位作者 张东华 陈羿丞 宋登新 王健 《实用骨科杂志》 2021年第11期999-1004,共6页
目的骨关节炎(osteoarthritis,OA)是一种常见的关节疾病,可由内源性和表观遗传因素引起。软骨退变可恶化为OA。本研究旨在探讨长链非编码RNA(long non-coding RNA,LncRNA)GAS5在OA中的基本机制。方法14例正常膝关节软骨组织取自2018年7... 目的骨关节炎(osteoarthritis,OA)是一种常见的关节疾病,可由内源性和表观遗传因素引起。软骨退变可恶化为OA。本研究旨在探讨长链非编码RNA(long non-coding RNA,LncRNA)GAS5在OA中的基本机制。方法14例正常膝关节软骨组织取自2018年7月至2020年7月因胫骨平台骨折在复旦大学附属中山医院吴淞医院行骨折内固定的患者,男8例,女6例;年龄19~40岁,平均(31±5)岁。35例OA膝关节软骨组织取自2018年7月至2020年7月在复旦大学附属中山医院吴淞医院就诊,诊断为OA且有膝关节置换手术指征的患者,男17例,女18例;年龄62~86岁,平均年龄(70±4)岁。采用实时荧光定量聚合酶链式反应(real time-quantitative polymerase chain reaction,RT-qPCR)检测金属蛋白酶抑制剂(tissue inhibitor of metalloproteinase,TIMP)-3 mRNA的表达情况。使用白细胞介素(interleukin,IL)-1β(10 ng/mL)建立OA细胞模型,分析OA基因芯片GSE16464。RT-qPCR和western-blot检测软骨分解代谢抑制因子TIMP-3的表达。用芯片定量聚合酶链反应(quantitative polymerase chain reaction,qPCR)检测TIMP-3启动子区富集的CpG岛情况。用生物信息学方法预测GAS5与TIMP-3的靶向关系,并用双荧光素酶报告基因检测法进行验证。结果在OA患者组织中TIMP-3 mRNA表达显著低于正常软骨组织,OA患者组与正常软骨组织软骨细胞TIMP-3启动子区甲基化阳性率分别为72.1%和35.7%。LncRNAGAS5在OA中高表达,LncRNAGAS5在OA中表达较正常软骨组织中表达明显上调(P<0.05)。Blast序列比对GAS5序列与TIMP-3启动子序列具有结合位点。沉默LncRNA GAS5促进TIMP-3表达,抑制OA软骨细胞胶原降解。双荧光素酶报告基因实验验证GAS5与TIMP-3具有靶向调控关系。结论OA软骨组织中TIMP-3低表达,而LncRNA GAS5表达上调;LncRNA GAS5可富集DNA甲基化转移酶,抑制TIMP-3的表达,促进软骨细胞胶原蛋白降解。 展开更多
关键词 长链非编码RNA gas5 骨关节炎 DNA甲基化转移酶 金属蛋白酶抑制剂-3
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Thermo-sensitive polymer nanospheres as a smart plugging agent for shale gas drilling operations 被引量:10
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作者 Wei-Ji Wang Zheng-Song Qiu +2 位作者 Han-Yi Zhong Wei-An Huang Wen-Hao Dai 《Petroleum Science》 SCIE CAS CSCD 2017年第1期116-125,共10页
Emulsifier-free poly(methyl methacrylate-styrene) [P(MMA-St)] nanospheres with an average particle size of 100 nm were synthesized in an isopropyl alcoholwater medium by a solvothermal method. Then, through radica... Emulsifier-free poly(methyl methacrylate-styrene) [P(MMA-St)] nanospheres with an average particle size of 100 nm were synthesized in an isopropyl alcoholwater medium by a solvothermal method. Then, through radical graft copolymerization of thermo-sensitive mono- mer N-isopropylacrylamide (NIPAm) and hydrophilic monomer acrylic acid (AA) onto the surface of P(MMA- St) nanospheres at 80 ℃, a series of thermo-sensitive polymer nanospheres, named SD-SEAL with different lower critical solution temperatures (LCST), were prepared by adjusting the mole ratio of NIPAm to AA. The products were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, particle size distribution, and specific surface area analysis. The temperature-sensitive behavior was studied by light transmittance tests, while the sealing performance was investigated by pressure transmission tests with Lungmachi Formation shales. The experimental results showed that the synthesized nanoparticles are sensitive to temperature and had apparent LCST values which increased with an increase in hydrophilic monomer AA. When the temperature was higher than its LCST value, SD- SEAL played a dual role of physical plugging and chemical inhibition, slowed down pressure transmission, and reduced shale permeability remarkably. The plugged layer of shale was changed to being hydrophobic, which greatly improved the shale stability 展开更多
关键词 Nanoparticle plugging agent Polymermicrospheres Thermo-sensitive polymer Wellborestability - Shale gas - Drilling fluid
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Methane Oxidation to Synthesis Gas Using Lattice Oxygen of La_(1-x)Sr_xMO_(3-λ)(M =Fe,Mn) Perovskite Oxides Instead of Molecular Oxygen 被引量:10
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作者 LiRanjia YuChangchun ZhuGuangrong ShenShikong 《Petroleum Science》 SCIE CAS CSCD 2005年第1期19-23,共5页
In this paper, the partial oxidation of methane to synthesis gas using lattice oxygen of La1- SrxMO3-λ (M=Fe, x ... In this paper, the partial oxidation of methane to synthesis gas using lattice oxygen of La1- SrxMO3-λ (M=Fe, x Mn) perovskite oxides instead of molecular oxygen was investigated. The redox circulation between 11% O2/Ar flow and 11% CH4/He flow at 900℃ shows that methane can be oxidized to CO and H2 with a selectivity of over 90.7% using the lattice oxygen of La1- SrxFeO3-λ (x≤0.2) perovskite oxides in an appropriate reaction condition, while the lost lattice x oxygen can be supplemented by air re-oxidation. It is viable for the lattice oxygen of La1- SrxFeO3-λ (x≤0.2) perovskite x oxides instead of molecular oxygen to react with methane to synthesis gas in the redox mode. 展开更多
关键词 Partial oxidation METHANE synthesis gas lattice oxygen La1- xSrxFeO3-λperovskite oxides
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Corrosion of Different Materials in Combustion Chamber of Yellow Phosphorus Tail Gas in Industrial Boiler 被引量:2
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作者 郜华萍 宁平 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第1期53-57,共5页
The corrosion of materials in combustion chamber of yellow phosphor tall gas was investrgated. The results reveal that the corrosion behavior is different for different materials under actual work conditions.
关键词 yellow phosphorus tail gas CORROSION industrial boiler CARBON metal material
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Catalysts for decomposing ozone tail gas 被引量:1
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作者 LIU Chang-an, SUN De-zhi, WANG Hui, LI Wei (Department of Environmental Science and Engineering, Harbin Institute of Technology, Harbin 150001,China. 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2003年第6期779-782,共4页
The preparation of immobilizing-catalysts for decomposing ozone by using dipping method was studied. XRD, XPS and TEM were used to characterize the catalysts. The three kinds of catalysts were selected preferentially,... The preparation of immobilizing-catalysts for decomposing ozone by using dipping method was studied. XRD, XPS and TEM were used to characterize the catalysts. The three kinds of catalysts were selected preferentially, and their catalytic activities were investigated. The results showed that the catalyst with activated carbon dipping acetate(active components are Mn:Cu=3:2, active component proportion in catalyst is 15%, calcination temperature is 200℃) has the best catalytic activity for ozone decomposing. One gram of catalyst can decompose 17.6 g ozone at initial ozone concentration of 2.5 g/m 3 and the residence time in reactor of 0.1 s. The experimental results also indicated that humidity of reaction system had negative effect on catalytic activity. 展开更多
关键词 ozone tail gas catalytic decomposition immobilizing-catalyst MnO 2 CUO
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Jet formation in shock-heavy gas bubble interaction 被引量:7
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作者 Zhi-Gang Zhai Ting Si +1 位作者 Li-Yong Zou Xi-Sheng Luo 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2013年第1期24-35,共12页
The influences of the acoustic impedance and shock strength on the jet formation in shock-heavy gas bubble interaction are numerically studied in this work. The process of a shock interacting with a krypton or a SF6 b... The influences of the acoustic impedance and shock strength on the jet formation in shock-heavy gas bubble interaction are numerically studied in this work. The process of a shock interacting with a krypton or a SF6 bubble is studied by the numerical method VAS2D. As a validation, the experiments of a SF6 bubble accelerated by a planar shock were performed. The results indicate that, due to the mismatch of acoustic impedance, the way of jet formation in heavy gas bubble with different species is diversified under the same initial condition. With respect to the same bubble, the manner of jet formation is also distinctly different under different shock strengths. The disparities of the acoustic impedance result in different effects of shock focusing in the bubble, and different behaviors of shock wave inside and outside the bubble. The analyses of the wave pattern and the pressure variation indicate that the jet formation is closely associated with the pressure perturbation. Moreover, the analy- sis of the vorticity deposition, and comparisons of circulation and baroclinic torque show that the baroclinic vorticity also contributes to the jet formation. It is concluded that the pres- sure perturbation and baroclinic vorticity deposition are the two dominant factors for the jet formation in shock-heavy gas bubble interaction. 展开更多
关键词 Shock-bubble interaction - Heavy gas bubble Acoustic impedance JET
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Gas2Δ171-313抑制K562细胞生长并增强其对伊马替尼的反应
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作者 葛跃 吴洁 赵昀 《东南大学学报(医学版)》 CAS 2013年第3期270-275,共6页
目的:研究Gas2及其变体对慢性髓细胞白血病(chronic myeloid leukemia,CML)K562细胞增殖的影响。方法:用PCR扩增Gas2编码区并构建两种Gas2变体(Gas2Δ171-313和Gas2Δ1-170)。以慢病毒为载体携带Gas2及变体到K562细胞中过表达,检测细胞... 目的:研究Gas2及其变体对慢性髓细胞白血病(chronic myeloid leukemia,CML)K562细胞增殖的影响。方法:用PCR扩增Gas2编码区并构建两种Gas2变体(Gas2Δ171-313和Gas2Δ1-170)。以慢病毒为载体携带Gas2及变体到K562细胞中过表达,检测细胞增殖能力、细胞衰老及Calpain活性,并分析细胞周期。结果:过表达Gas2Δ171-313能显著抑制K562细胞增殖,而全长Gas2和Gas2Δ1-170对细胞增殖无显著影响;Gas2及其变体都对细胞周期无显著影响;Gas2Δ171-313可以显著提高细胞的Calpain活性,并促进细胞衰老;Gas2Δ171-313也能与伊马替尼协同性抑制K562细胞的集落生成能力。结论:Gas2Δ171-313能使K562细胞发生衰老类似的生长抑制,并与伊马替尼协同性抑制K562细胞的生长。 展开更多
关键词 慢性髓细胞白血病 gas2Δ171-313 伊马替尼
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Formation conditions and accumulation characteristics of Bozhong 19-6 large condensate gas field in offshore Bohai Bay Basin 被引量:6
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作者 XU Changgui YU Haibo +1 位作者 WANG Jun LIU Xiaojian 《Petroleum Exploration and Development》 2019年第1期27-40,共14页
Based on the study of natural gas resource, low buried hill trap formation mechanism, high quality reservoir control factors and natural gas preservation conditions, the formation conditions and reservoir accumulation... Based on the study of natural gas resource, low buried hill trap formation mechanism, high quality reservoir control factors and natural gas preservation conditions, the formation conditions and reservoir accumulation characteristics of Bozhong 19-6 large condensate gas field were summarized. Large gas generation potential of multiple sets of thick humic-sapropelic source rocks in high maturity stage in Bozhong depression was the basis of large gas field formation. The multi-stage tectonic evolution since Indosinian period formed large-scale buried hill traps. The Tanlu fault activity formed multi-type reservoirs, and buried hill metamorphic rock of Archean and sand-conglomerate of Kongdian Formation were high-quality reservoirs. Thick overpressure lacustrine mudstone and weak neotectonic movement provided good preservation conditions. Bozhong 19-6 gas reservoir was a condensate gas reservoir with very high condensate oil content, and the gas origin was humic-sapropelic and kerogen-cracking gas, and the gas field had large gas thickness, high gas column characteristics and the accumulation process was first oil and then gas. The buried hill reservoir was a massive reservoir and the Kongdian reservoir was a stratified reservoir. The gas field had multi-channel hydrocarbon intense charge from overpressure source rocks, atmospheric-weak overpressure reservoir favorable for accumulation, thick overpressure mudstone caprock favorable for preservation, and natural gas ultra-late rapid accumulation model. 展开更多
关键词 OFFSHORE Bohai Bay Basin Bozhong 19-6 gas field CONDENSATE gas low buried HILL METAMORPHIC rock reservoir accumulation characteristics ARCHEAN
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Simulation and visualization of the displacement between CO2 and formation fluids at pore-scale levels and its application to the recovery of shale gas 被引量:8
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作者 Peng Hou Yang Ju +2 位作者 Feng Gao Jianguo Wang Jian He 《International Journal of Coal Science & Technology》 EI 2016年第4期351-369,共19页
This article reports recent developments and advances in the simulation of the CO2-formation fluid displacement behaviour at the pore scale of subsurface porous media. Roughly, there are three effective visualization ... This article reports recent developments and advances in the simulation of the CO2-formation fluid displacement behaviour at the pore scale of subsurface porous media. Roughly, there are three effective visualization approaches to detect and observe the CO2-formation fluid displacement mechanism at the micro-scale, namely, magnetic resonance imaging, X-ray computed tomography and fabricated micromodels, but they are not capable of investigating the dis- placement process at the nano-scale. Though a lab-on-chip approach for the direct visualization of the fluid flow behaviour in nanoscale channels has been developed using an advanced epi-fluorescence microscopy method combined with a nanofluidic chip, it is still a qualitative analysis method. The lattice Boltzmann method (LBM) can simulate the CO2 displacement processes in a two-dimensional or three-dimensional (3D) pore structure, but until now, the CO2 displace- ment mechanisms had not been thoroughly investigated and the 3D pore structure of real rock had not been directly taken into account in the simulation of the CO2 displacement process. The status of research on the applications of CO2 displacement to enhance shale gas recovery is also analyzed in this paper. The coupling of molecular dynamics and LBM in tandem is proposed to simulate the CO2-shale gas displacement process based on the 3D digital model of shale obtained from focused ion beams and scanning electron microscopy. 展开更多
关键词 CO2-formation fluid displacement Micro- and nano-pore scale Shale gas recovery Lattice Boltzman nmethods - Molecular dynamics FIB-SEM
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