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小檗碱抵抗压力超负荷大鼠心肌肥厚的作用及其机制
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作者 王家璞 张晓娟 +3 位作者 介希 许慧玉 王科 朱宗凤 《中国药物与临床》 CAS 2024年第6期348-352,共5页
目的观察小檗碱抵抗压力超负荷大鼠心肌肥厚的作用及其可能机制。方法40只SD大鼠通过腹主动脉缩窄术建立压力超负荷心肌肥厚模型,术后分为4组:假手术组(sham组)、压力超负荷手术组(AAC组)、AAC+小檗碱组、AAC+小檗碱+自噬抑制剂3-甲基嘌... 目的观察小檗碱抵抗压力超负荷大鼠心肌肥厚的作用及其可能机制。方法40只SD大鼠通过腹主动脉缩窄术建立压力超负荷心肌肥厚模型,术后分为4组:假手术组(sham组)、压力超负荷手术组(AAC组)、AAC+小檗碱组、AAC+小檗碱+自噬抑制剂3-甲基嘌呤(3-MA)组。术后观察4周采用小动物超声测心功能,蛋白质印迹实验测凋亡相关因子B细胞淋巴瘤因子2蛋白(bcl-2)和凋亡蛋白(bax)表达、自噬相关蛋白beclin1表达、信号通路相关哺乳动物雷帕霉素靶蛋白(mTOR)和磷酸化mTOR(p-mTOR)表达。结果与sham组相比,AAC组的左心室收缩末期内径(LVESD)为(4.80±0.32)mm、左心室舒张末期内径(LVEDD)为(5.97±0.18)mm、bax/bcl-2比值为(1.31±0.06)、p-mTOR/mTOR比值为(1.20±0.07),均高于sham组,左心室射血分数(LVEF)为(50.90±1.71)%、左心室缩短分数(LVFS)为(34.87±0.45)%,均低于sham组,差异均有统计学意义(P<0.05),但是beclin1/GAPDH减少差异无统计学意义。与AAC组相比,AAC+小檗碱组的LVESD为(4.33±0.10)mm、LVEDD为(4.91±0.55)mm、bax/bcl-2比值为0.81±0.07、p-mTOR/mTOR比值为1.07±0.03,均低于AAC组,LVEF为(56.32±1.44)%、LVFS为(40.71±0.94)%、beclin1/GAPDH比值为1.59±0.04,均高于AAC组,差异均有统计学意义(P<0.05)。与AAC+小檗碱组相比,AAC+小檗碱+3MA组的LVEDD为(5.82±0.19)mm、bax/bcl-2比值为(1.28±0.04),均高于AAC+小檗碱组,而LVEF为(52.44±0.57)%、LVFS为(37.14±0.34)%、beclin1/GAPDH比值为(1.32±0.08),均低于AAC+小檗碱组,差异均有统计学意义(P<0.05)。结论小檗碱通过自噬增强来抵抗AAC大鼠心肌肥厚,降低心肌细胞凋亡水平,其机制与抑制mTOR有关。 展开更多
关键词 小檗碱 心肌肥厚 自噬 凋亡
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拉伸流动作用下CFs/UHMWPE/HDPE共混物的制备及性能
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作者 殷小春 魏伟东 +2 位作者 揭熙 何光建 文劲松 《塑料》 CAS CSCD 北大核心 2023年第4期1-6,12,共7页
介绍了一种拉伸流动支配的叶片挤出机的结构及其熔融塑化过程,利用该设备制备了碳纤维(CFs)/超高分子量聚乙烯(UHMWPE)/高密度聚乙烯(HDPE)共混物,研究了CFs和UHMWPE含量对共混物微观形貌、结晶性能和力学性能的影响。SEM图像表明,拉伸... 介绍了一种拉伸流动支配的叶片挤出机的结构及其熔融塑化过程,利用该设备制备了碳纤维(CFs)/超高分子量聚乙烯(UHMWPE)/高密度聚乙烯(HDPE)共混物,研究了CFs和UHMWPE含量对共混物微观形貌、结晶性能和力学性能的影响。SEM图像表明,拉伸流动支配的叶片挤出机对CFs和UHMWPE有很好的分散混合效果;DSC分析结果表明,低含量的CFs和UHMWPE可以协同提高共混物的结晶度;加入适量的CFs和UHMWPE可使共混物的拉伸强度明显提升,当UHMWPE含量为8%、CF含量为12%时,CFs/UHMWPE/HDPE共混物拉伸强度与HDPE纯料相比,提高了23.4%;与CFs/HDPE共混物相比,加入UHMWPE可以有效缓解共混物冲击强度的降低,当UHMWPE含量为12%时,CFs/UHMWPE/HDPE共混物的冲击强度与CFs/HDPE共混物相比,提高了29.7%。 展开更多
关键词 拉伸流动 叶片挤出机 高密度聚乙烯 超高分子量聚乙烯 碳纤维
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急性缺氧诱导小鼠心肌细胞微小RNA-34a升高和凋亡实验研究
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作者 刘龙梅 石懿玉 +4 位作者 杨霞 介希 连婷婷 王仲朝 韩学斌 《陕西医学杂志》 CAS 2023年第10期1295-1298,1303,共5页
目的:探讨急性缺氧对心肌细胞miR-34a表达、蛋白磷酸酶1核靶向亚基(PNUTS)蛋白和凋亡的影响。方法:原代培养小鼠乳鼠心肌细胞,缺氧24 h造模,使用antimiR-34a纳米颗粒干预。将其随机分为三组:对照组、缺氧组、缺氧+antimiR-34a纳米颗粒... 目的:探讨急性缺氧对心肌细胞miR-34a表达、蛋白磷酸酶1核靶向亚基(PNUTS)蛋白和凋亡的影响。方法:原代培养小鼠乳鼠心肌细胞,缺氧24 h造模,使用antimiR-34a纳米颗粒干预。将其随机分为三组:对照组、缺氧组、缺氧+antimiR-34a纳米颗粒组。采用实时荧光定量聚合酶链反应(qRT-PCR)测miR-34a表达,Western blot检测PNUTS蛋白表达,流式细胞术测凋亡率。结果:与对照组相比,缺氧24 h后miR-34a表达明显增高(P<0.05),PNUTS水平降低(P<0.05),凋亡率升高(P<0.05);与缺氧组相比,缺氧+antimiR-34a纳米颗粒组的miR-34a表达下降(P<0.05),PNUTS水平升高(P<0.05),凋亡率下降(P<0.05)。结论:急性缺氧上调小鼠心肌细胞miR-34a基因表达,下调其下游PNUTS蛋白表达,同时上调凋亡率;antimiR-34a纳米颗粒抑制急性缺氧诱导的小鼠心肌细胞miR-34a升高,PNUTS降低以及细胞凋亡。 展开更多
关键词 MIR-34A 纳米颗粒 PNUTS 心肌细胞凋亡 急性缺氧 心肌梗死
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Advances in Basic Theory Research of Mongolian Medicine and Prospects of Its Combination with Systems Biology Research
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作者 Zhichao QI jie xi 《Medicinal Plant》 CAS 2023年第1期92-95,共4页
This paper sorted out the relevant literature on the basic theory of Mongolian medicine,explored the research methods and ideas of the basic theory of Mongolian medicine,and elaborated the idea of combining systems bi... This paper sorted out the relevant literature on the basic theory of Mongolian medicine,explored the research methods and ideas of the basic theory of Mongolian medicine,and elaborated the idea of combining systems biology to study part of the basic theory of Mongolian medicine.Through searching classic works and research papers in academic journals,this paper sorted out and summarized the research progress of the basic theory of Mongolian medicine and the existing problems in the current research,analyzed its characteristics,combined with systems biology methods to systematically explain some content in the basic theory,reveal its scientific connotation,and provide a basis for further research. 展开更多
关键词 Mongolian medicine Basic theory MODERNIZATION Systems biology
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Risk factors and prediction of macrosomia in a cohort study
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作者 jie xi Zhi-Ping Zhang +4 位作者 Li-xin Yang Yan Chen Ya-Jing Mao Qiu-Feng Liang Miao xiong 《Journal of Hainan Medical University》 2019年第19期62-67,共6页
Objective: To investigate the risk factors of macrosomia and to predict the risk of macrosomia so as to reduce the incidence of macrosomia. Methods: A total of 2063 pregnant women who met the inclusion criteria were s... Objective: To investigate the risk factors of macrosomia and to predict the risk of macrosomia so as to reduce the incidence of macrosomia. Methods: A total of 2063 pregnant women who met the inclusion criteria were selected as the subjects from February 2016 to April 2017 in Jiading District Maternal and Child Health Hospital of Shanghai and Pudong New Area Maternal and Child Health Hospital. According to the birth weight of the neonates, the neonates were divided into the macrosomia group (neonatal weight > 4000 g, n=125) and the normal infant group (2500 g < neonatal weight < 4000 g, n=1938).The general data of age, number of pregnant women, BMI before pregnancy, gestational diabetes mellitus, glucose tolerance, weight gain during pregnancy, birth weight and gestational week were compared between the two groups. Multivariate logistic regression was used to analyze the risk factors of macrosomia. Results: ①There were significant differences in BMI, glucose tolerance, fasting blood sugar, weight gain in the second trimester, weight gain in the third trimester, birth weight and gestational week between the two groups (P<0.05). ②Single factor analysis showed that pre-pregnancy BMI, gestational week at first diagnosis, fasting blood glucose tolerance, weight gain in the second trimester, weight gain in the third trimester, gestational week and birth weight were the influencing factors of macrosomia (P<0.05). ③Multi-factor analysis showed that gestational weeks, gestational diabetes, fasting glucose tolerance and weight growth in the second trimester were the main factors affecting the production of macrosomia, among which gestational diabetes was the protective factor, while gestational weeks, fasting glucose tolerance and weight growth in the second trimester were the risk factors. Conclusion: The high risk factors for macrosomia are gestational weeks, glucose tolerance, fasting blood sugar and weight gain in the second trimester of pregnancy.We should strengthen regular obstetric examination, health care during pregnancy, reasonable diet and proper exercise, and strictly control the weight gain during the second trimester of pregnancy. At the same time, we should monitor blood sugar in time so as to reduce the incidence of macrosomia. 展开更多
关键词 MACROSOMIA NEONATES Risk factors Logistic regression analysis
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Correlation of urine sFlt-1/PLGF ratio with abnormal trophoblast invasion and apoptosis in pregnant women with preeclampsia
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作者 xi-Ping Hong jie xi 《Journal of Hainan Medical University》 2018年第14期54-57,共4页
Objective:To investigate the correlation of urine sFlt-1/PLGF ratio with abnormal trophoblast invasion and apoptosis in pregnant women with preeclampsia.Methods:A total of 183 healthy second-trimester pregnant women w... Objective:To investigate the correlation of urine sFlt-1/PLGF ratio with abnormal trophoblast invasion and apoptosis in pregnant women with preeclampsia.Methods:A total of 183 healthy second-trimester pregnant women who received antenatal care in this hospital between December 2015 and December 2017 were selected as the normal control group, and 62 second-trimester pregnant women with preeclampsia who received antenatal care in this hospital during the same period were selected as the preeclampsia group. The difference of sFlt-1/PLGF ratio in the urine was compared between the two groups of pregnant women, and the expression levels of invasion-related genes and apoptosis-related genes in the placental tissues were detected. The Pearson test was adopted to further evaluate the correlation of urine sFlt-1/PLGF ratio with abnormal trophoblast invasion and apoptosis in pregnant women with preeclampsia.Results: Urine sFlt-1/PLGF ratio of preeclampsia group was significantly higher than that in normal control group;Rho, ROCK, Notch-1, MMP9 and LAMA4 mRNA expression in placental tissues of preeclampsia group were lower than those of normal control group whereas CDKN1C mRNA expression was higher than that of normal control group;Bcl-2 and Survivin mRNA expression in placental tissues of preeclampsia group were lower than those of normal control group whereas Bax, Caspase-3 and Caspase-8 mRNA expression were higher than those of normal control group. Correlation analysis showed that the urine sFlt-1/PLGF ratio of pregnant women with preeclampsia was directly correlated with the expression of placental trophoblast invasion-related genes and apoptosis-related genes in pregnant women with preeclampsia.Conclusion: The sFlt-1/PLGF ratio abnormally increases in the urine of pregnant women with preeclampsia, which can further aggravate the abnormal invasion and apoptosis of placental trophoblast cells. 展开更多
关键词 PREECLAMPSIA sFlt-1/PLGF RATIO Invasion APOPTOSIS
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A Glimpse of Intangible Cultural Heritage in Hong Kong and Macao
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作者 jie xi 《China & The World Cultural Exchange》 2014年第12期37-38,共2页
关键词 非物质文化遗产 香港 澳门 潮州 广东省 TOT
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An Artemisinin Derivative ART1 Induces Ferroptosis by Targeting the HSD17B4 Protein Essential for Lipid Metabolism and Directly Inducing Lipid Peroxidation
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作者 Jingjing xie Guangya Zhu +11 位作者 Ming Gao jie xi Ge Chen xinxin Ma Yu Yan Zhiyuan Wang Ze-Jun Xu Hui-Jun Chen Hong-Dong Hao Yaoyang Zhang Zhu-Jun Yao Jidong Zhu 《CCS Chemistry》 CAS 2022年第1期304-317,共14页
Artemisinin and its derivatives,commonly known as antimalarial drugs,have gradually come to be regarded as potential antitumor agents,although their cytotoxic efficacy and mechanisms of action remain to be settled.Her... Artemisinin and its derivatives,commonly known as antimalarial drugs,have gradually come to be regarded as potential antitumor agents,although their cytotoxic efficacy and mechanisms of action remain to be settled.Herein,we report that an artemisinin analog,ART1,can potently induce ferroptosis in a subset of cancer cell lines.Structure–activity relationship(SAR)analysis reveals that both the endoperoxide moiety and the artemisinin skeleton are required for the antitumor activity of ART1.Aided with ART1-based small-molecule tools,chemical proteomic analysis identified the HSD17B4 protein as a direct target of ART1.HSD17B4 resides in peroxisomes and is an essential enzyme in the catabolism of very-long-chain fatty acids.Our results demonstrate that ART1 initiates ferroptosis through selective oxidation of the fatty acids in peroxisomes by hijacking the HSD17B4 protein without disturbing its enzymatic function,providing a promising mechanism to develop therapeutics for cancer treatment. 展开更多
关键词 artemisinin derivative ANTITUMOR ferroptosis HSD17B4 SELECTIVITY MESENCHYMAL
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11-Aza-artemisinin Derivatives Exhibit Anticancer Activities by Targeting the Fatty Acid Binding Protein 6(FABP6)
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作者 xin-Ya Chen Yue Yin +6 位作者 jie xi Yi Yuan Yan Li Qing Li Ren-xiao Wang Zhu-Jun Yao Gong-Li Tang 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2018年第12期1197-1201,共5页
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