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BMPRⅡ^(+)neural precursor cells isolated and characterized from organotypic neurospheres:an in vitro model of human fetal spinal cord development 被引量:1
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作者 Michael W.Weible II Michael D.Lovelace +2 位作者 Hamish D.Mundell Tsz Wai Rosita Pang Tailoi Chan-Ling 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第2期447-457,共11页
Roof plate secretion of bone morphogenetic proteins(BMPs)directs the cellular fate of sensory neurons during spinal cord development,including the formation of the ascending sensory columns,though their biology is not... Roof plate secretion of bone morphogenetic proteins(BMPs)directs the cellular fate of sensory neurons during spinal cord development,including the formation of the ascending sensory columns,though their biology is not well understood.Type-ⅡBMP receptor(BMPRⅡ),the cognate receptor,is expressed by neural precursor cells during embryogenesis;however,an in vitro method of enriching BMPRⅡ^(+)human neural precursor cells(hNPCs)from the fetal spinal cord is absent.Immunofluorescence was undertaken on intact second-trimester human fetal spinal cord using antibodies to BMPRⅡand leukemia inhibitory factor(LIF).Regions of highest BMPRⅡ^(+)immunofluorescence localized to sensory columns.Parenchymal and meningeal-associated BMPRⅡ^(+)vascular cells were identified in both intact fetal spinal cord and cortex by co-positivity with vascular lineage markers,CD34/CD39.LIF immunostaining identified a population of somas concentrated in dorsal and ventral horn interneurons,mirroring the expression of LIF receptor/CD118.A combination of LIF supplementation and high-density culture maintained culture growth beyond 10 passages,while synergistically increasing the proportion of neurospheres with a stratified,cytoarchitecture.These neurospheres were characterized by BMPRⅡ^(+)/MAP2ab^(+/–)/βⅢ-tubulin^(+)/nestin^(–)/vimentin^(–)/GFAP^(–)/NeuN^(–)surface hNPCs surrounding a heterogeneous core ofβⅢ-tubulin^(+)/nestin^(+)/vimentin^(+)/GFAP^(+)/MAP2ab^(–)/NeuN^(–)multipotent precursors.Dissociated cultures from tripotential neurospheres contained neuronal(βⅢ-tubulin^(+)),astrocytic(GFAP+),and oligodendrocytic(O4+)lineage cells.Fluorescence-activated cell sorting-sorted BMPRⅡ^(+)hNPCs were MAP2ab^(+/–)/βⅢ-tubulin^(+)/GFAP^(–)/O4^(–)in culture.This is the first isolation of BMPRⅡ^(+)hNPCs identified and characterized in human fetal spinal cords.Our data show that LIF combines synergistically with high-density reaggregate cultures to support the organotypic reorganization of neurospheres,characterized by surface BMPRⅡ^(+)hNPCs.Our study has provided a new methodology for an in vitro model capable of amplifying human fetal spinal cord cell numbers for>10 passages.Investigations of the role BMPRⅡplays in spinal cord development have primarily relied upon mouse and rat models,with interpolations to human development being derived through inference.Because of significant species differences between murine biology and human,including anatomical dissimilarities in central nervous system(CNS)structure,the findings made in murine models cannot be presumed to apply to human spinal cord development.For these reasons,our human in vitro model offers a novel tool to better understand neurodevelopmental pathways,including BMP signaling,as well as spinal cord injury research and testing drug therapies. 展开更多
关键词 BMPR bone morphogenetic protein histotypic human spinal cord development leukemia inhibitory factor NEUROSPHERE ORGANOTYPIC reaggregate sensory columns
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艾灸对佐剂性关节炎大鼠滑膜组织Beclin-1、LC3-Ⅱ表达的影响
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作者 彭雄 周兰 +6 位作者 施雨燕 龚志贤 张亮 艾坤 李鑫 陈青 刘梨 《湖南中医药大学学报》 CAS 2024年第1期122-127,共6页
目的观察艾灸对类风湿关节炎(rheumatoid arthritis,RA)大鼠炎症因子白细胞介素-2(interleukin-2,IL-2)及滑膜细胞中自噬相关因子Beclin-1、微管相关蛋白1轻链3-Ⅱ(microtubule-associated protein1 light chain 3-Ⅱ,LC3-Ⅱ)表达的影响... 目的观察艾灸对类风湿关节炎(rheumatoid arthritis,RA)大鼠炎症因子白细胞介素-2(interleukin-2,IL-2)及滑膜细胞中自噬相关因子Beclin-1、微管相关蛋白1轻链3-Ⅱ(microtubule-associated protein1 light chain 3-Ⅱ,LC3-Ⅱ)表达的影响,探索艾灸治疗RA的作用机制。方法将36只雄性SD大鼠随机分为空白组、模型组、甲氨蝶呤组、艾灸组,每组9只。采用弗氏完全佐剂造模法制备RA大鼠模型。造模成功后艾灸组予艾灸足三里、关元,每次20 min,每天1次;甲氨蝶呤组予甲氨蝶呤0.35 mg/kg灌胃,每周2次。空白组、模型组、甲氨蝶呤组每天给予艾灸组大鼠同样时长及强度的捆绑。每组均干预3周。观察大鼠一般情况,采用足趾容积测量仪检测大鼠左后肢足趾容积,ELISA法检测血清中IL-2含量,Western blot检测大鼠踝关节滑膜组织中Beclin-1、LC3-Ⅱ蛋白相对表达量。结果与模型组比较,甲氨蝶呤组及艾灸组精神一般,反应尚可,体质量恢复,较活跃,摄食、饮水尚可,足部肿胀、红肿缓解,其局部炎症及全身多发性关节炎情况均轻于模型组。与空白组比较,模型组大鼠于造模后第3、10、17、24天足趾容积明显增大(P<0.01),结合一般情况,提示模型制备成功;甲氨蝶呤组、艾灸组足趾容积于第24天增大(P<0.05)。与模型组比较,甲氨蝶呤组造模后第17、24天足趾容积降低(P<0.05,P<0.01),艾灸组第10、17、24天足趾容积明显降低(P<0.01)。干预3周后,与空白组比较,模型组血清中IL-2含量明显升高(P<0.01),滑膜组织Beclin-1、LC3-Ⅱ蛋白表达量明显上升(P<0.01);与模型组比较,甲氨蝶呤组、艾灸组血清中IL-2含量降低(P<0.05),艾灸组滑膜组织Beclin-1、LC3-Ⅱ蛋白表达量下降(P<0.05)。结论艾灸能改善RA大鼠关节肿胀,降低IL-2含量,其作用机制可能是通过调节自噬因子Beclin-1、LC3-Ⅱ蛋白表达量有关。 展开更多
关键词 类风湿关节炎 佐剂性关节炎 滑膜组织 艾灸 白细胞介素-2 BECLIN-1 微管相关蛋白1轻链3-
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8-isoPGF2α、Metrnl、LC3B-Ⅱ/LC3B-Ⅰ与T2MD患者血糖在目标范围内时间的相关性及预测糖尿病周围神经病变的价值
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作者 徐云 陈雪辉 +3 位作者 白立炜 耿锐娜 孟祥雨 覃艳 《海南医学》 CAS 2024年第10期1390-1395,共6页
目的探讨8-异前列腺素F2α(8-isoPGF2α)、镍纹样蛋白(Metrnl)、微管相关蛋白3B-Ⅱ(LC3B-Ⅱ)/微管相关蛋白-Ⅰ(LC3B-Ⅰ)与2型糖尿病(T2MD)患者血糖在目标范围内时间(TIR)的相关性及对糖尿病周围神经病变(DPN)预测价值。方法选取2020年5... 目的探讨8-异前列腺素F2α(8-isoPGF2α)、镍纹样蛋白(Metrnl)、微管相关蛋白3B-Ⅱ(LC3B-Ⅱ)/微管相关蛋白-Ⅰ(LC3B-Ⅰ)与2型糖尿病(T2MD)患者血糖在目标范围内时间(TIR)的相关性及对糖尿病周围神经病变(DPN)预测价值。方法选取2020年5月至2022年10月新乡医学院第一附属医院收治的187例T2DM患者进行前瞻性研究,根据是否合并DPN分为DPN组(n=48)和无DPN组(n=139)。比较两组患者及根据TIR四分位数分组的患者8-isoPGF2α、Metrnl、LC3B-Ⅱ/LC3B-Ⅰ水平,采用Pearson相关性分析8-isoPGF2α、Metrnl、LC3B-Ⅱ/LC3B-Ⅰ与TIR相关性,采用多因素Logistic回归分析DPN的相关影响因素;绘制受试者工作特征曲线(ROC)评价8-isoPGF2α、Metrnl、LC3B-Ⅱ预测DPN的价值。结果DPN组患者的TIR为(51.43±7.68)%,明显低于无DPN组的(56.94±8.12)%,差异有统计学意义(P<0.05);DPN组患者的8-isoPGF2α、Metrnl分别为(162.78±51.33)pg/mL、(259.18±74.42)pg/mL,明显高于无DPN组的(129.56±43.00)pg/mL、(208.37±65.61)pg/mL,LC3B-Ⅱ/LC3B-Ⅰ为0.89±0.27,明显低于无DPN组的1.15±0.31,差异均有统计学意义(P<0.05);根据TIR第25、50、75百分位数将全部患者分为Q1~Q4四组,8-isoPGF2α、Metrnl在Q4组最低,LC3B-Ⅱ/LC3B-Ⅰ在Q4组最高;8-isoPGF2α、Metrnl随着TIR降低逐渐升高,LC3B-Ⅱ/LC3B-Ⅰ随着TIR降低而降低,四组间比较差异均有统计学意义(P<0.05);Pearson相关性分析结果显示,8-isoPGF2α、Metrnl与TIR呈显著负相关(r=-0.786、-0.665,P<0.01),LC3B-Ⅱ/LC3B-Ⅰ与TIR呈显著正相关(r=0.711,P<0.01);多因素Logistic回归分析结果显示,TIR、LC3B-Ⅱ/LC3B-Ⅰ是DPN的独立相关保护因素(P<0.05),8-isoPGF2α、Metrnl是DPN的独立相关危险因素(P<0.05);ROC分析结果显示,单一指标中,Metrnl预测DPN的AUC最大(0.830),特异度最高(87.05%),8-isoPGF2α+Metrnl+LC3B-Ⅱ预测DPN的AUC为0.923(95%CI:0.875~0.957),大于Metrnl,预测敏感度为87.50%,特异度为85.61%(P<0.05)。结论8-isoPGF2α、Metrnl、LC3B-Ⅱ/LC3B-Ⅰ与T2MD患者TIR有关,均是患者并发DPN的预警因素。联合检测三者能为临床分层管理和早期识别DPN高风险人群提供参考。 展开更多
关键词 8-异前列腺素F2Α 镍纹样蛋白 微管相关蛋白3B-/微管相关蛋白-Ⅰ 2型糖尿病 血糖在目标范围内时间 糖尿病周围神经病变 相关性 预测价值
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血清学标志物甲胎蛋白、PIVKA-Ⅱ和磷脂酰肌醇蛋白聚糖3联合诊断肝癌的meta分析 被引量:1
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作者 宋红亮 王建国 +4 位作者 张会 吴勇锋 汪恺 王晓波 徐骁 《浙江大学学报(医学版)》 CAS CSCD 北大核心 2024年第1期131-139,共9页
目的:探讨血清生物标志物甲胎蛋白(AFP)、维生素K缺失或拮抗剂Ⅱ诱导的蛋白质(PIVKA-Ⅱ)和磷脂酰肌醇蛋白聚糖3(GPC-3)单独或联合用于肝细胞癌(以下简称肝癌)诊断的价值。方法:检索PubMed、Web of Science、Embase三个数据库,收集2002... 目的:探讨血清生物标志物甲胎蛋白(AFP)、维生素K缺失或拮抗剂Ⅱ诱导的蛋白质(PIVKA-Ⅱ)和磷脂酰肌醇蛋白聚糖3(GPC-3)单独或联合用于肝细胞癌(以下简称肝癌)诊断的价值。方法:检索PubMed、Web of Science、Embase三个数据库,收集2002年以来发表的AFP、PIVKA-Ⅱ和GPC-3单独或联合用于诊断肝癌的文献。根据纳入和排除标准筛选文献并提取相关数据。利用诊断准确性研究的质量评价(QUADAS)检查表对纳入的文献进行质量评价,并采用Meta DiSc软件、Review Manager 5.4软件和Stata 15.1软件对AFP、PIVKA-Ⅱ和GPC-3单用和联合使用诊断肝癌的受试者工作特征曲线下面积(AUC)、敏感度、特异度等指标进行数据分析。结果:共纳入32篇文献。Meta分析结果显示,单个标志物用于诊断肝癌时,PIVKA-Ⅱ的AUC值最高,为0.88(95%CI:0.85~0.91),其次是GPC-3和AFP;多个标志物联合用于诊断肝癌的AUC均高于单个标志物,其中PIVKA-Ⅱ联合GPC-3诊断的AUC值最高,为0.90(95%CI:0.87~0.92)。单个标志物用于诊断肝癌时,PIVKA-Ⅱ和GPC-3的敏感度相对较高(分别为0.75和0.76),但GPC-3的特异度不如PIVKA-Ⅱ和AFP(AFP、PIVKA-Ⅱ和GPC-3分别为0.87、0.88和0.81);多个标志物联合用于诊断肝癌的敏感度较单个标志物诊断时有所提高,但特异度无明显提高。单个标志物用于诊断肝癌时,PIVKA-Ⅱ的诊断比值比(DOR)最高,为22(95%CI:13~36),其次是GPC-3和AFP;两个标志物联合用于诊断肝癌的DOR均高于单个标志物,其中AFP联合GPC-3诊断的DOR最高,为25(95%CI:9~67);三个标志物联合用于诊断肝癌时的DOR明显降低,为10(95%CI:7~45)。结论:单个标志物用于肝癌诊断时,PIVKA-Ⅱ的诊断价值更高。两种标志物联合能显著提高肝癌诊断的敏感度,三种标志物联合未能进一步提高诊断价值。结合临床实际,推荐AFP联合PIVKA-Ⅱ用于肝癌的诊断。 展开更多
关键词 肝细胞癌 血清学标志物 甲胎蛋白 维生素K缺失或拮抗剂诱导的蛋白质 磷脂酰肌醇蛋白聚糖3 诊断 META分析
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Ⅱ型子宫内膜癌患者癌组织中IMP3、PTEN表达及其临床意义
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作者 李颖 马媛 李凯丽 《实用癌症杂志》 2024年第5期753-756,共4页
目的分析Ⅱ型子宫内膜癌(EC)患者癌组织中胰岛素样生长因子Ⅱ信使RNA结合蛋白3(IMP3)和磷酸酶与张力蛋白同源物(PTEN)的表达情况,并探讨其临床意义。方法收集60例Ⅱ型EC患者手术切除的癌组织及20例对应癌旁组织的存档石蜡标本,采用免疫... 目的分析Ⅱ型子宫内膜癌(EC)患者癌组织中胰岛素样生长因子Ⅱ信使RNA结合蛋白3(IMP3)和磷酸酶与张力蛋白同源物(PTEN)的表达情况,并探讨其临床意义。方法收集60例Ⅱ型EC患者手术切除的癌组织及20例对应癌旁组织的存档石蜡标本,采用免疫组织化学法(IHC)检测标本中IMP3、PTEN蛋白表达情况;分析IMP3、PTEN蛋白表达与EC患者临床病理特征及预后的关系。结果EC患者癌组织中IMP3阳性表达率高于癌旁组织,PTEN阳性表达率低于癌旁组织,差异均有统计学意义(P<0.05)。EC患者癌组织IMP3阳性表达率与肌层浸润深度、FIGO分期及淋巴结转移有关(P<0.05),即肌层浸润深度越深、FIGO分期越晚、合并淋巴结转移者IMP3阳性表达率越高。PTEN阳性表达率与FIGO分期、淋巴结转移有关(P<0.05),即FIGO分期越晚、合并淋巴结转移者PTEN阳性表达率越低。Spearman相关性分析结果显示,EC患者癌组织中IMP3和PTEN蛋白表达无显著相关性(P>0.05)。IMP3阳性组整体生存情况差于IMP3阴性组,PTEN阳性组整体生存情况优于PTEN阴性组(P<0.05)。结论Ⅱ型EC患者癌组织中IMP3表达上调,而PTEN表达下调,二者表达异常可能参与了Ⅱ型EC的发生与发展,且IMP3阳性表达、PTEN阴性表达与Ⅱ型EC患者不良预后相关。 展开更多
关键词 型子宫内膜癌 胰岛素样生长因子信使RNA结合蛋白3 磷酸酶与张力蛋白同源物 预后
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血清PIVKA-Ⅱ、AFP与HBV-DNA联合检测对HBV所致肝癌的诊断及预后预测价值
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作者 万强 赵波 王瑶瑶 《标记免疫分析与临床》 CAS 2024年第4期685-691,共7页
目的探究血清异常凝血酶原Ⅱ(PIVKA-Ⅱ)、甲胎蛋白(AFP)与乙肝病毒脱氧核糖核酸(HBV-DNA)联合检测对HBV所致肝癌(HCC)的诊断及预后预测价值。方法选取2018年8月至2020年7月在本院接受治疗的98例HCC患者作为研究对象(肝癌组),另取同期95... 目的探究血清异常凝血酶原Ⅱ(PIVKA-Ⅱ)、甲胎蛋白(AFP)与乙肝病毒脱氧核糖核酸(HBV-DNA)联合检测对HBV所致肝癌(HCC)的诊断及预后预测价值。方法选取2018年8月至2020年7月在本院接受治疗的98例HCC患者作为研究对象(肝癌组),另取同期95例体检健康人群作为健康组,95例肝硬化患者作为肝硬化组,观察3组受试者血清PIVKA-Ⅱ、AFP与HBV-DNA表达水平和一般资料差异。根据肝癌组3年内预后情况将患者分为生存组(57例)和死亡组(41例)。比较肝癌组一般资料和血清PIVKA-Ⅱ、AFP与HBV-DNA水平关系;多因素Logistic和COX回归分析分别分析影响受试者患肝癌和患者预后不良的影响因素;四格表法计算血清PIVKA-Ⅱ、AFP与HBV-DNA水平对HCC的预测价值;ROC曲线分析评估血清PIVKA-Ⅱ、AFP与HBV-DNA水平对HCC患者预后的预测价值。结果肝癌组患者血清PIVKA-Ⅱ、AFP与HBV-DNA水平显著高于健康组和肝硬化组(P<0.05);HCC发病与血清PIVKA-Ⅱ、AFP与HBV-DNA水平有关,且是危险因素(P<0.05)。HCC患者预后不良与血清PIVKA-Ⅱ、AFP与HBV-DNA水平以及肿瘤数量有关(P<0.05),且是危险因素。血清PIVKA-Ⅱ、AFP与HBV-DNA水平以及3项联合诊断HCC发病的准确度分别为77.43%、72.57%、77.43%和84.72%。血清PIVKA-Ⅱ、AFP与HBV-DNA水平以及3项联合诊断HCC预后不良的AUC分别为0.823、0.841、0.824和0.958,3项联合诊断效能优于单一诊断(P<0.05)。结论血清PIVKA-Ⅱ、AFP与HBV-DNA水平在HCC患者和预后不良患者中呈高表达,且3项联合可有效预测HCC发病和HCC患者预后情况。 展开更多
关键词 肝癌 异常凝血酶原 甲胎蛋白 乙肝病毒脱氧核糖核酸 诊断 预后
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原发性肝癌患者血清PIVKA-Ⅱ、AFP表达水平及其临床意义
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作者 卓晓娅 陈礼好 黄定蒙 《浙江创伤外科》 2024年第4期622-624,628,共4页
目的探讨原发性肝癌患者血清维生素K缺乏或拮抗剂-Ⅱ诱导的蛋白质(PIVKA-Ⅱ)、甲胎蛋白(AFP)水平变化及其临床意义。方法回顾性分析温州医科大学附属苍南医院2019年1月至2023年10月接诊的68例原发性肝癌患者的临床资料,作为肝癌组,并选... 目的探讨原发性肝癌患者血清维生素K缺乏或拮抗剂-Ⅱ诱导的蛋白质(PIVKA-Ⅱ)、甲胎蛋白(AFP)水平变化及其临床意义。方法回顾性分析温州医科大学附属苍南医院2019年1月至2023年10月接诊的68例原发性肝癌患者的临床资料,作为肝癌组,并选择同期接诊的50例乙型肝炎肝硬化患者作为肝硬化组、50例慢性乙型肝炎患者作为肝炎组、50例健康人群作为对照组。比较四组血清PIVKA-Ⅱ、AFP水平,比较肝癌组不同病理特征患者血清PIVKA-Ⅱ、AFP水平。结果肝癌组血清PIVKA-Ⅱ、AFP水平均高于肝硬化组、肝炎组及对照组,有统计学意义(P<0.05),肝硬化组、肝炎组、对照组血清PIVKA-Ⅱ比较,无统计学意义(P>0.05),肝硬化组、肝炎组血清AFP比较,无统计学意义(P>0.05);肝癌组不同TNM分期、肝功能Child分级、肿瘤直径、病灶数量、淋巴结转移、微血管侵犯患者比较,均有统计学意义(P<0.05)。结论原发性肝癌患者血清PIVKA-Ⅱ、AFP均明显升高,可反映患者病情程度,有较好的临床应用价值。 展开更多
关键词 原发性肝癌 维生素K缺乏或拮抗剂-诱导的蛋白质 甲胎蛋白 病理特征
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胃窦癌组织中LAG-3 FGL1 MHC-Ⅱ的表达与预后的关系
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作者 戚颖 黄子祺 +2 位作者 别鸿宇 颜次慧 任秀宝 《中国肿瘤临床》 CAS CSCD 北大核心 2024年第2期64-69,共6页
目的:探索新型免疫检查点淋巴细胞激活基因3(lymphocyte-activation gene 3,LAG-3)、纤维蛋白原样蛋白1(fibrinogenlike protein 1,FGL1)、主要组织相容性复合体Ⅱ类分子(major histocompatibility complex classⅡ,MHC-Ⅱ)在胃窦癌(gas... 目的:探索新型免疫检查点淋巴细胞激活基因3(lymphocyte-activation gene 3,LAG-3)、纤维蛋白原样蛋白1(fibrinogenlike protein 1,FGL1)、主要组织相容性复合体Ⅱ类分子(major histocompatibility complex classⅡ,MHC-Ⅱ)在胃窦癌(gastric antral cancer,GAC)中的表达情况与预后的相关性。方法:收集2012年1月至2014年12月于天津医科大学肿瘤医院诊断为GAC的67例患者病理标本,分别进行石蜡切片制作,采用免疫组织化学法检测LAG-3、FGL1、MHC-Ⅱ三个指标的表达情况,并用统计学方法分析组间差异。采用Kaplan-Meier法评估LAG-3、FGL1、MHC-Ⅱ的表达水平与GAC患者预后之间的关系并绘制生存曲线。结果:GAC患者中,肿瘤大小<4 cm的患者和无淋巴结转移的患者LAG-3免疫细胞阳性率更高(P<0.05);女性患者MHC-Ⅱ免疫细胞阳性率更高(P<0.05)。免疫细胞中LAG-3、MHC-Ⅱ高表达的患者总生存期(overall survival,OS)较好(P<0.05);肿瘤细胞中MHC-Ⅱ高表达的患者OS、无病生存期(disease-free survival,DFS)较差(P<0.05);而FGL1在免疫细胞和肿瘤细胞中的表达与OS、DFS无显著相关性(P>0.05)。结论:GAC患者LAG-3、MHC-Ⅱ在不同区域的表达量存在差异,GAC患者LAG-3及其配体在免疫细胞的表达对预后产生积极影响,提示免疫细胞中LAG-3/MHC-Ⅱ可以作为GAC患者预后标志物,为临床个体化免疫治疗提供新的依据。 展开更多
关键词 胃窦癌 淋巴细胞激活基因3 纤维蛋白原样蛋白1 主要组织相容性复合体类分子 生存 预后
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多层螺旋CT参数联合血清AFP、AFU、PIVKA-Ⅱ检测对老年原发性肝癌患者的诊断价值
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作者 苟飞 芮娟利 《临床医学研究与实践》 2024年第28期111-114,共4页
目的 探讨多层螺旋CT(MSCT)参数联合血清甲胎蛋白(AFP)、α-L-岩藻糖苷酶(AFU)、维生素K缺乏或拮抗剂Ⅱ诱导的蛋白质(PIVKA-Ⅱ)检测对老年原发性肝癌(PHC)患者的诊断价值。方法 选取100例老年PHC患者作为PHC组,另选取同期的100例良性肝... 目的 探讨多层螺旋CT(MSCT)参数联合血清甲胎蛋白(AFP)、α-L-岩藻糖苷酶(AFU)、维生素K缺乏或拮抗剂Ⅱ诱导的蛋白质(PIVKA-Ⅱ)检测对老年原发性肝癌(PHC)患者的诊断价值。方法 选取100例老年PHC患者作为PHC组,另选取同期的100例良性肝病患者作为良性肝病组。所有受试者均进行MSCT检查,记录肝动脉灌注量(HAP)、血流量(BF)、平均通过时间(MTT)及对比剂到达时间(IRF To),检测血清AFP、AFU、PIVKA-Ⅱ水平,评估其联合检测对老年PHC的诊断效能。结果 PHC组的HAP、BF高于良性肝病组,MTT长于良性肝病组,IRF To低于良性肝病组(P<0.05)。PHC组的血清AFP、AFU、PIVKA-Ⅱ水平高于良性肝病组(P<0.05)。Ⅲ~Ⅳ期PHC患者的血清AFP、AFU、PIVKA-Ⅱ水平高于Ⅰ~Ⅱ期PHC患者(P<0.05)。MSCT参数及血清AFP、AFU、PIVKA-Ⅱ联合检测对老年PHC患者的诊断效能优于单独检测(P<0.05)。结论 MSCT参数联合血清AFP、AFU、PIVKA-Ⅱ检测对老年PHC患者的诊断效能较好。 展开更多
关键词 多层螺旋CT 原发性肝癌 甲胎蛋白 Α-L-岩藻糖苷酶 维生素K缺乏或拮抗剂诱导的蛋白质
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膀胱癌组织Beclin1、LC3Ⅱ蛋白的表达及与患者肿瘤特征、预后的相关性分析 被引量:1
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作者 姬文莉 王翠翠 +1 位作者 林珍珍 张焕 《中国现代医学杂志》 CAS 北大核心 2023年第18期14-19,共6页
目的观察膀胱癌组织中自噬基因Beclin1、微管相关蛋白1轻链3-Ⅱ(LC3Ⅱ)蛋白表达状况,并分析两者与预后的相关性。方法选取2020年1月—2021年8月新疆医科大学附属肿瘤医院病理资料完整的110例膀胱癌患者。观察患者膀胱癌组织中Beclin1、... 目的观察膀胱癌组织中自噬基因Beclin1、微管相关蛋白1轻链3-Ⅱ(LC3Ⅱ)蛋白表达状况,并分析两者与预后的相关性。方法选取2020年1月—2021年8月新疆医科大学附属肿瘤医院病理资料完整的110例膀胱癌患者。观察患者膀胱癌组织中Beclin1、LC3Ⅱ蛋白表达状况,记录病理参数,并对患者进行为期1年的随访。统计预后情况,观察不同病理参数及预后的膀胱癌患者膀胱癌组织中Beclin1、LC3Ⅱ蛋白表达,并分析两者与患者预后的相关性。结果膀胱癌组织Beclin1、LC3Ⅱ蛋白高表达率较癌旁组织低,Beclin1、LC3Ⅱ蛋白中低表达率较癌旁组织高(P<0.05)。高组织学分级、T_(2)~T_(4)分期、浸润性、淋巴结转移、预后不良的膀胱癌患者Beclin1蛋白高表达率低于低组织学分级、T_(a)~T_(1)分期、非浸润性、无淋巴结转移、预后良好的患者(P<0.05)。不同性别、年龄、肿瘤直径、血管侵犯的膀胱癌患者Beclin1蛋白表达率比较,差异无统计学意义(P>0.05)。高组织学分级、T_(2)~T_(4)分期、浸润性、淋巴结转移、预后不良的膀胱癌患者LC3Ⅱ蛋白高表达率低于低组织学分级、T_(a)~T_(1)分期、非浸润性、无淋巴结转移、预后良好的患者(P<0.05)。不同性别、年龄、肿瘤直径、血管侵犯的膀胱癌患者LC3Ⅱ蛋白表达率比较,差异无统计学意义(P>0.05)。经Phi系数相关性分析,Beclin1、LC3Ⅱ蛋白与预后不良均呈负相关(Phi=-0.277和-0.222,均P<0.05)。多因素逐步Logistic回归分析结果显示:Beclin1高表达[O^R=3.892(95%CI:1.504,10.072)]、LC3Ⅱ蛋白中低表达[O^R=3.358(95%CI:1.165,9.677)]是预后不良的危险因素(P<0.05)。结论膀胱癌组织中Beclin1、LC3Ⅱ表达与预后密切相关,Beclin1、LC3Ⅱ蛋白中低表达是预后不良的危险因素。 展开更多
关键词 膀胱癌 BECLIN1 微管相关蛋白1轻链3- 预后 相关性
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联合检测血清AFP、AFP-L3%和PIVKA-Ⅱ水平早期诊断和判断原发性肝癌患者预后临床价值探讨 被引量:8
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作者 石磊 安梓铭 冯琴 《实用肝脏病杂志》 CAS 2023年第3期404-407,共4页
目的 探讨联合检测血清甲胎蛋白(AFP)、甲胎蛋白异质体3比率(AFP-L3%)和维生素K拮抗剂诱导蛋白-Ⅱ(PIVKA-Ⅱ)早期诊断和判断原发性肝癌(PLC)患者预后的临床价值。方法 2016年1月~2018年12月我院收治的PLC患者87例、乙型肝炎肝硬化患者7... 目的 探讨联合检测血清甲胎蛋白(AFP)、甲胎蛋白异质体3比率(AFP-L3%)和维生素K拮抗剂诱导蛋白-Ⅱ(PIVKA-Ⅱ)早期诊断和判断原发性肝癌(PLC)患者预后的临床价值。方法 2016年1月~2018年12月我院收治的PLC患者87例、乙型肝炎肝硬化患者79例、慢性乙型肝炎患者73例和健康体检者65例,所有PLC患者均接受经肝动脉化疗栓塞术(TACE)治疗,随访3年。采用化学发光免疫分析法检测血清AFP和PIVKA-Ⅱ水平,采用免疫荧光法检测血清AFP-L3。应用Logistic回归分析影响PLC患者3 a生存率的独立危险因素,应用受试者工作特征曲线(ROC)下面积(AUC)评估血清指标预测PLC患者预后的价值。结果 PLC组血清AFP、AFP-L3%和PIVKA-Ⅱ水平分别为(402.5±95.3)μg/L、(12.9±3.1)和(824.5±82.1) mAU/mL,显著高于乙型肝炎肝硬化组【分别为(17.9±2.6)μg/L、(8.6±1.2)和(30.4±3.2)mAU/mL,P<0.05】或慢性乙型肝炎组【分别为(20.3±6.4)μg/L、(5.4±0.9)和(29.8±3.0)mAU/mL,P<0.05】或健康体检组【分别为(2.2±0.1)μg/L、(2.7±0.4)和(26.3±3.4)mAU/mL,P<0.05】;52例死亡组血清AFP、AFP-L3%和PIVKA-Ⅱ水平分别为(447.1±71.2)μg/L、(14.1±2.2)和(883.9±50.8)mAU/mL,显著高于35例生存组【分别为(336.2±58.4)μg/L、(11.0±1.8)和(736.2±37.0)mAU/mL,P<0.05】;单因素分析显示,TNM分期、Child分级、肝外转移、血清AFP、AFP-L3%和PIVKA-Ⅱ水平均会影响PLC患者预后(P<0.05);多因素Logistic回归分析显示,TNMⅢ/Ⅳ期、Child C级、肝外转移、血清AFP≥410.5μg/L、AFP-L3%≥12.1和PIVKA-Ⅱ≥807.2 mAU/mL是影响PLC患者预后的独立危险因素(P<0.05);ROC曲线分析显示,血清AFP、AFP-L3%和PIVKA-Ⅱ联合预测PLC患者3 a预后的AUC为0.908,显著高于三者单独预测的0.763、0.830和0.792(P<0.05)。结论 联合检测血清AFP、AFP-L3%和PIVKA-Ⅱ水平可以帮助诊断PLC,并可能据此判断TACE治疗患者的预后,具有很大的临床意义。 展开更多
关键词 原发性肝癌 甲胎蛋白 甲胎蛋白异质体3比率 维生素K拮抗剂诱导蛋白- 诊断 预后
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子痫前期患者血清CTRP6、sTNFR-Ⅱ水平及其诊断价值 被引量:2
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作者 马丽丽 史伟 +1 位作者 唐田田 周明慧 《中国计划生育学杂志》 2023年第3期662-665,共4页
目的:探究子痫前期(PE)患者血清C1q/肿瘤坏死因子相关蛋白6(CTRP6)、可溶性肿瘤坏死因子受体(sTNFR)-Ⅱ水平及其诊断价值。方法:选取2021年6月-2022年6月在本院确诊为PE的患者148例临床资料为PE组,根据病情程度分为轻度PE组(85例)和重... 目的:探究子痫前期(PE)患者血清C1q/肿瘤坏死因子相关蛋白6(CTRP6)、可溶性肿瘤坏死因子受体(sTNFR)-Ⅱ水平及其诊断价值。方法:选取2021年6月-2022年6月在本院确诊为PE的患者148例临床资料为PE组,根据病情程度分为轻度PE组(85例)和重度PE组(63例),常规产前检查健康孕妇75例为对照组。酶联免疫吸附测定法测定各组血清CTRP6、sTNFR-Ⅱ水平;Pearson法分析PE患者血清CTRP6、sTNFR-Ⅱ的相关性;受试者工作特征曲线(ROC)分析CTRP6、sTNFR-Ⅱ对PE发生发展的诊断价值。结果:重度PE组、轻度PE组、对照组尿蛋白定量、ALT、Fib、Cr、收缩压、舒张压水平依次降低,PT值依次增加,血清CTRP6、sTNFR-Ⅱ水平依次降低(均P<0.05)。相关性分析,PE患者血清CTRP6与sTNFR-Ⅱ的表达呈正相关(r=0.354,P<0.001)。ROC曲线分析,CTRP6与sTNFR-Ⅱ联合诊断PE发生的曲线下面积(AUC)(0.975)高于CTRP6、sTNFR-Ⅱ单独诊断,其敏感度、特异性分别为79.7%和92.3%;诊断重度PE的AUC为0.925,敏感度、特异性分别为39.7%和98.8%,高于CTRP6和sTNFR-Ⅱ单独诊断(均P<0.001)。结论:PE患者血清CTRP6、sTNFR-Ⅱ水平异常升高,二者与疾病严重程度有关,且联合诊断可提高PE的诊断效能。 展开更多
关键词 子痫前期 C1q/肿瘤坏死因子相关蛋白6 可溶性肿瘤坏死因子受体-
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血清PIVKA-Ⅱ、AFP、AFP-L3%联合检测在原发性肝癌诊断中的应用价值 被引量:1
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作者 余小龙 罗晓莉 +1 位作者 金善丰 陈燕 《中国现代药物应用》 2023年第10期63-66,共4页
目的 研究原发性肝癌诊断中血清异常凝血酶原(PIVKA-Ⅱ)、甲胎蛋白(AFP)、甲胎蛋白异质体比率(AFP-L3%)联合检测的应用价值。方法 选取150例健康体检者、100例慢性乙型肝炎(乙肝)患者、87例原发性肝癌患者,分别设为对照组、肝炎组、肝... 目的 研究原发性肝癌诊断中血清异常凝血酶原(PIVKA-Ⅱ)、甲胎蛋白(AFP)、甲胎蛋白异质体比率(AFP-L3%)联合检测的应用价值。方法 选取150例健康体检者、100例慢性乙型肝炎(乙肝)患者、87例原发性肝癌患者,分别设为对照组、肝炎组、肝癌组。所有研究对象均进行PIVKA-Ⅱ、AFP、AFP-L3检测,对比三组肿瘤标志物的检测结果及阳性检出率,肿瘤标志物单项检测与联合检测的诊断效能。结果 对照组PIVKA-Ⅱ为(2.76±0.41)mAU/ml、AFP为(3.05±0.64)μg/L、AFP-L3%为(3.01±0.52)%;肝炎组PIVKA-Ⅱ为(14.32±2.18)mAU/ml、AFP为(18.67±2.11)μg/L、AFP-L3%为(10.14±2.13)%;肝癌组PIVKA-Ⅱ为(9750.59±17934.97)mAU/ml、AFP为(23865.92±69102.40)μg/L、AFP-L3%为(16.72±17.66)%。对照组、肝炎组、肝癌组的PIVKA-Ⅱ、AFP、AFP-L3%呈升高趋势,且各组间对比,差异有统计学意义(P<0.05)。肝癌组PIVKA-Ⅱ、AFP、AFP-L3%单项检测阳性检出率与联合检测阳性检出率分别为73.56%、65.52%、62.07%、87.36%,均高于对照组的0、0、0、0与肝炎组的4.00%、8.00%、10.00%、6.00%,且肝炎组高于对照组,差异有统计学意义(P<0.05)。在原发性肝癌中,PIVKA-Ⅱ单项检测敏感度为73.56%、特异度为96.00%、准确性为85.56%、阳性预测值为94.12%、阴性预测值为80.67%;AFP单项检测敏感度为65.52%、特异度为92.00%、准确性为79.68%、阳性预测值为87.69%、阴性预测值为75.41%;AFP-L3%单项检测敏感度为62.07%、特异度为90.00%、准确性为77.01%、阳性预测值为84.38%、阴性预测值为73.17%;PIVKA-Ⅱ、AFP、AFP-L3%联合检测敏感度为91.95%、特异度为98.00%、准确性为95.19%、阳性预测值为97.56%、阴性预测值为93.33%。PIVKA-Ⅱ、AFP、AFP-L3%联合检测的敏感度、准确性以及阴性预测值均高于PIVKA-Ⅱ、AFP、AFP-L3%单项检测,特异度高于AFP-L3%单项检测,阳性预测值高于AFP、AFP-L3%单项检测,差异有统计学意义(P<0.05)。结论 联合检测血清PIVKA-Ⅱ、AFP、AFP-L3能够促进原发性肝癌诊断效能的提升,并可将其与其他肝病进行鉴别区分。 展开更多
关键词 原发性肝癌 异常凝血酶原 甲胎蛋白 甲胎蛋白异质体比率 诊断价值
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Protein induced by vitamin K absence or antagonist-Ⅱ versus alpha-fetoprotein in the diagnosis of hepatocellular carcinoma: A systematic review with meta-analysis 被引量:39
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作者 Hao Xing Yi-Jie Zheng +5 位作者 Jun Han Han Zhang Zhen-Li Li Wan-Yee Lau Feng Shen Tian Yang 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS CSCD 2018年第6期487-495,共9页
Background: As a promising biomarker of hepatocellular carcinoma(HCC), protein induced by vitamin K absence or antagonist-Ⅱ(PIVKA-Ⅱ) has been studied extensively. However, its diagnostic capability varies across HCC... Background: As a promising biomarker of hepatocellular carcinoma(HCC), protein induced by vitamin K absence or antagonist-Ⅱ(PIVKA-Ⅱ) has been studied extensively. However, its diagnostic capability varies across HCC studies. This study aimed to compare the performance of PIVKA-Ⅱ with alpha-fetoprotein(AFP) in the diagnosis of HCC. Data sources: A systematic literature search was conducted to identify the studies from MEDLINE, Embase and Cochrane Library Databases, which were published up to December 20, 2017 to compare the diagnostic capability of PIVKA-Ⅱ and AFP for HCC. The data were pooled using random effects model. Pooled sensitivity and specificity were calculated. Summary receiver operating characteristic curve(ROC) was employed to evaluate the diagnostic accuracy of each marker. Results: Thirty-one studies were included. The pooled sensitivity(95% CI) of PIVKA-Ⅱ and AFP was 0.66(0.65–0.68) and 0.66(0.65–0.67), respectively in diagnosis of HCC; and the corresponding pooled specificity(95% CI) was 0.89(0.88–0.90) and 0.84(0.83–0.85), respectively. The area under the ROC curve(AUC) of PIVKA-Ⅱ and AFP was 0.856(0.817–0.895) and 0.770(0.728–0.811), respectively. Subgroup analysis showed that PIVKA-Ⅱ was superior to AFP in terms of the AUC for both small HCC( < 3 cm) [0.863(0.825–0.901) vs 0.717(0.658–0.776)] and large HCC( ≥ 3 cm) [0.854(0.811–0.897) vs 0.729(0.682–0.776)]; for American [0.926(0.897–0.955) vs 0.698(0.594–0.662)], European [0.772(0.743–0.801) vs 0.628(0.594–0.662)], Asian [0.838(0.812–0.864) vs 0.785(0.764–0.806)] and African [0.812(0.794–0.840) vs 0.721(0.675–0.767)] HCC patients; and for HBV-related [0.909(0.866–0.951) vs 0.714(0.673–0.755)] and mixed-etiology [0.847(0.821–0.873) vs 0.794(0.772–0.816)] HCC. Conclusion: This meta-analysis indicates that PIVKA-Ⅱ is better than AFP in terms of the accuracy for diagnosing HCC, regardless of tumor size, patient ethnic group, or HCC etiology. 展开更多
关键词 Hepatocellular carcinoma Meta-analyses protein induced by vitamin K absence or antagonist- ALPHA-FETOprotein
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Suppression of Breast Cancer Proliferation and Induction of Apoptosis via AKT and ERK1/2 Signal Transduction Pathways by Synthetic Polypeptide Derived from Viral Macrophage Inflammatory Protein Ⅱ 被引量:4
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作者 杨清玲 陈昌杰 +2 位作者 杨志峰 高艳军 唐洁 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2011年第4期497-503,共7页
SDF-1α,a ligand for the chemokine receptor CXCR4,is well known for mediating the migration of breast cancer cells.In a previous study we demonstrated that a synthetic 21-mer peptide antagonist of CXCR4(NT21MP) deri... SDF-1α,a ligand for the chemokine receptor CXCR4,is well known for mediating the migration of breast cancer cells.In a previous study we demonstrated that a synthetic 21-mer peptide antagonist of CXCR4(NT21MP) derived from the viral macrophage inflammatory protein Ⅱ could antagonize tumor growth in vivo by inhibiting cellular proliferation and inducing apoptosis in breast cancer cells.However,the role of SDF-1α in the signaling pathways underlying the proliferation of human breast cancer cells and associated signaling pathways and inhibiting signal pathways of NT21MP remained unclear.The present study investigated the mechanism of NT21MP on anti-tumor in breast cancer in vitro.The effect of NT21MP on the viability of cells was determined by the MTT assay.Annexin V-FITC and PI staining was performed to detect early stage apoptosisin SKBR3 cells treated with SDF-1α and AMD3100 or NT21MP.Western blotting techniques were used to assay the composition of phosphoproteomics and total proteins present in the SKBR3 breast cancer cells.RT-PCR and Western blotting technique were used to detect the effect of NT21MP and AMD3100 on Bcl-2 and Bax expression.The results indicated that SDF-1α prevented apoptosis and promoted the proliferation of SKBR3 human breast cancer cells.As compared with untreated SKBR3 cells,Treatment with SDF-1α significantly increased cell viability,and NT21MP abolished the protective effects of SDF-1α dose-dependently(P0.05).There was a significant decrease in the percentage of apoptotic cells after SDF-1α treatment as compared with control group(2.7%±0.2% vs.5.7%±0.4%,P0.05).But pretreatment of SKBR3 cells with NT21MP significantly attenuated the antiapoptotic effects of SDF-1α as compared with SKBR3 cells without NT21MP pretreatment.The proliferative and anti-apoptotic effects of SDF-1α in SKBR3 cells were associated with an increase in AKT and ERK1/2 phosphorylation as well as a decrease in Bax expression and an increase in Bcl-2 expression.These changes in intracellular processes were blocked by NT21MP in a dose-dependent manner(P0.05).In conclusion,NT21MP efficiently inhibits SDF-1α-induced proliferation and antiapoptosis in SKBR3 cells by reducing the levels of phosphorylated AKT and ERK1/2,as well as decreasing the ratio of expression of Bcl-2 relative to Bax. 展开更多
关键词 viral macrophage inflammatory protein CXCR4 PROLIFERATION APOPTOSIS AKT
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Effect of glycosides of Cistanche on the expression of mitochondrial precursor protein and keratin type Ⅱ cytoskeletal 6A in a rat model of vascular dementia 被引量:5
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作者 Yan-mei Zhang Wei Wu +2 位作者 Wei Ma Fang Wang Jun Yuan 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第7期1152-1158,共7页
Glycosides of Cistanche(GC)is a preparation used extensively for its neuroprotective effect against neurological diseases,but its mechanisms of action remains incompletely understood.Here,we established a bilateral ... Glycosides of Cistanche(GC)is a preparation used extensively for its neuroprotective effect against neurological diseases,but its mechanisms of action remains incompletely understood.Here,we established a bilateral common carotid artery occlusion model of vascular dementia in rats and injected the model rats with a suspension of GC(10 mg/kg/day,intraperitoneally)for 14 consecutive days.Immunohistochemistry showed that GC significantly reduced p-tau and amyloid beta(Aβ)immunoreactivity in the hippocampus of the model rats.Proteomic analysis demonstrated upregulation of mitochondrial precursor protein and downregulation of keratin type II cytoskeletal6A after GC treatment compared with model rats that had received saline.Western blot assay confirmed these findings.Our results suggest that the neuroprotective effect of GC in vascular dementia occurs via the promotion of neuronal cytoskeleton regeneration. 展开更多
关键词 nerve regeneration vascular dementia glycosides of Cistanche mitochondrial precursor protein keratin type cytoskeletal 6A PROTEOMICS NEUROPROTECTION neural regeneration
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Protein induced by vitamin K absence or antagonist Ⅱ-producing gastric cancer 被引量:4
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作者 Yoshihisa Takahashi Tohru Inoue Toshio Fukusato 《World Journal of Gastrointestinal Pathophysiology》 CAS 2010年第4期129-136,共8页
Protein induced by vitamin K absence or antagonist Ⅱ(PIVKA-Ⅱ) is a putative specific marker of hepatocellular carcinoma(HCC),but it may also be produced by asmall number of gastric cancers.To date,16 cases of PIVKA-... Protein induced by vitamin K absence or antagonist Ⅱ(PIVKA-Ⅱ) is a putative specific marker of hepatocellular carcinoma(HCC),but it may also be produced by asmall number of gastric cancers.To date,16 cases of PIVKA-Ⅱ-producing gastric cancer have been reported,2 of which were reported by us and all of which were identified in Japan.There are no symptoms specific to PIVKA-Ⅱ-producing gastric cancer,and the representative clinical symptoms are general fatigue,appetite loss,and upper abdominal pain.Serum alpha-feto-protein(AFP)levels are also increased in almost allcases.Liver metastasis is observed in approximately 80% of cases and portal vein tumor thrombus is ob-served in approximately 20% of cases.Differential diagnosis between metastatic liver tumor and HCC is often difficult.Grossly,almost all cases appear as advanced gastric cancer.Histologically,a hepatoid pattern is observed in many cases,in addition to a moderately to poorly differentiated adenocarcinoma component.The production of PIVKA-Ⅱ and AFP is usually confirmed using immunohistochemical staining.Treatment and prognosis largely depends on the existence of liver meta-stasis,and the prognosis of patients with liver metas-tasis is very poor.PIVKA-Ⅱ may be produced during the hepatocellular metaplasia of the tumor cells. 展开更多
关键词 protein INDUCED by vitamin K ABSENCE or ANTAGONIST Gastric cancer ALPHA-FETOprotein Hepato-cellular CARCINOMA Hepatoid CARCINOMA
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Effects of Calmodulin-dependent Protein Kinase Ⅱ Inhibitor,KN-93,on Electrophysiological Features of Rabbit Hypertrophic Cardiac Myocytes 被引量:2
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作者 柯俊 陈锋 +6 位作者 张存泰 肖幸 涂晶 戴木森 王晓萍 陈兵 陈敏 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2012年第4期485-489,共5页
Cardiac hypertrophy is an independent risk factor for sudden cardiac death in clinical settings and the incidence of sudden cardiac death and ventricular arrhythmias are closely related.The aim of this study was to de... Cardiac hypertrophy is an independent risk factor for sudden cardiac death in clinical settings and the incidence of sudden cardiac death and ventricular arrhythmias are closely related.The aim of this study was to determine the effects of the calmodulin-dependent protein kinase(CaMK) Ⅱ inhibitor,KN-93,on L-type calcium current(I Ca,L) and early after-depolarizations(EADs) in hypertrophic cardiomyocytes.A rabbit model of myocardial hypertrophy was constructed through abdominal aortic coarctation(LVH group).The control group(sham group) received a sham operation,in which the abdominal aortic was dissected but not coarcted.Eight weeks later,the degree of left ventricular hypertrophy(LVH) was evaluated using echocardiography.Individual cardiomyocyte was isolated through collagenase digestion.Action potentials(APs) and I Ca,L were recorded using the perforated patch clamp technique.APs were recorded under current clamp conditions and I Ca,L was recorded under voltage clamp conditions.The incidence of EADs and I ca,L in the hypertrophic cardiomyocytes were observed under the conditions of low potassium(2 mmol/L),low magnesium(0.25 mmol/L) Tyrode’s solution perfusion,and slow frequency(0.25-0.5 Hz) electrical stimulation.The incidence of EADs and I ca,L in the hypertrophic cardiomyocytes were also evaluated after treatment with different concentrations of KN-92(KN-92 group) and KN-93(KN-93 group).Eight weeks later,the model was successfully established.Under the conditions of low potassium,low magnesium Tyrode’s solution perfusion,and slow frequency electrical stimulation,the incidence of EADs was 0/12,11/12,10/12,and 5/12 in sham group,LVH group,KN-92 group(0.5 μmol/L),and KN-93 group(0.5 μmol/L),respectively.When the drug concentration was increased to 1 μmol/L in KN-92 group and KN-93 group,the incidence of EADs was 10/12 and 2/12,respectively.At 0 mV,the current density was 6.7±1.0 and 6.3±0.7 PA·PF-1 in LVH group and sham group,respectively(P>0.05,n=12).When the drug concentration was 0.5 μmol/L in KN-92 and KN-93 groups,the peak I Ca,L at 0 mV was decreased by(9.4±2.8)% and(10.5±3.0)% in the hypertrophic cardiomyocytes of the two groups,respectively(P>0.05,n=12).When the drug concentration was increased to 1 μmol/L,the peak I Ca,L values were lowered by(13.4±3.7)% and(40±4.9)%,respectively(P<0.01,n=12).KN-93,a specific inhibitor of CaMKII,can effectively inhibit the occurrence of EADs in hypertrophic cardiomyocytes partially by suppressing I Ca,L,which may be the main action mechanism of KN-93 antagonizing the occurrence of ventricular arrhythmias in hypertrophic myocardium. 展开更多
关键词 calmodulin-dependent protein kinase KN-93 myocardial hypertrophy ELECTROPHYSIOLOGY perforated patch recording techniques
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碳源诱导下D.desulfuricans sub sp.EPS特性及对Cd(Ⅱ)的吸附 被引量:1
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作者 黄祥武 宋卫锋 +6 位作者 杨佐毅 戴文灿 甘雨 连泽阳 周文斌 陈丽瑶 吴芷昕 《中国环境科学》 EI CAS CSCD 北大核心 2023年第6期2889-2898,共10页
通过不同浓度下3种碳源(HCOONa、CH_(3)COONa和C_(6)H_(12)O_(6))对Desulfovibrio desulfuricans sub sp.(D.desulfuricans sp.)进行胁迫/诱导培养,研究了胁迫/诱导前后EPS组分变化以及对Cd(Ⅱ)吸附性能的影响.结果表明,当碳源HCOONa的... 通过不同浓度下3种碳源(HCOONa、CH_(3)COONa和C_(6)H_(12)O_(6))对Desulfovibrio desulfuricans sub sp.(D.desulfuricans sp.)进行胁迫/诱导培养,研究了胁迫/诱导前后EPS组分变化以及对Cd(Ⅱ)吸附性能的影响.结果表明,当碳源HCOONa的胁迫浓度为3.0g/L时,胁迫/诱导效果最明显,EPS产量达到1709.78mg/g VSS,其中蛋白质含量最高,达到1516.68mg/g VSS,较胁迫/诱导前提高了244.93%.在此条件下,HCOONa-EPS对于Cd(Ⅱ)的吸附量最高,为1081.95mg/g EPS,提高了99.47%,且吸附过程符合二级动力学规律.三维荧光(3D-EEM)测试表明,胁迫/诱导后EPS中蛋白质含量尤其类色氨酸含量大幅增加;傅里叶红外光谱(FTIR)测试表明,胁迫后C=O、N-H/C-N、C-O-C等官能团均大量增加,在吸附Cd(Ⅱ)中发挥了重要作用;X光电子能谱(XPS)结果表明,HCOONa胁迫/诱导后,EPS中C-O/C-N、C=O、C=N等官能团的浓度明显增加,可能是吸附Cd(Ⅱ)的主要基团. 展开更多
关键词 EPS 蛋白质 碳源 Cd()
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Isolation and Characterization of Proteins Interacting with Activin Type Ⅱ Receptors 被引量:1
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作者 LIU Biao BAO Yong-li +4 位作者 WEI Zhuang WU Yin MENG Xiang-ying LI Yu-xin YIN Wei-tian 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2006年第2期217-220,共4页
Regulation of the number of aetivin receptors that are present in the cell membrane plays a key role in the modulation of cellular responses to activin. In order to find the regulators, a novel protein ARIPzip, intera... Regulation of the number of aetivin receptors that are present in the cell membrane plays a key role in the modulation of cellular responses to activin. In order to find the regulators, a novel protein ARIPzip, interacting with activin type II receptors, was searched and identified by using yeast two-hybrid screening. ARIPzip is a splicing variant of ARIP2. This has been discussed previously. ARIPzip can specifically interact with ActR Ⅱ A, and is widely distributed in mouse tissues. Overexpression of ARIPzip can cause the activin-induced transcriptional activities to increase in a dose-dependent manner while the overexpression of ARIV2 can decrease these activities. These data suggest that the C-terminal rezions of ARIP2 and ARIPzip are involved in the regulation of activin signaling. 展开更多
关键词 ACTIVIN Activin receptor A( ActR A) Activin receptor interaction protein(ARIP)
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