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基于GPX4通路的益气解毒方抗脑缺血铁死亡保护机制研究 被引量:1
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作者 蔡冰洁 李淑婷 +4 位作者 高艳华 张琪曼 杨家霖 张滢 李韶菁 《中南药学》 CAS 2024年第10期2551-2559,共9页
目的研究益气解毒方抗急性缺血性脑卒中铁死亡相关保护机制。方法采用大脑中动脉栓塞(MCAO)法复制大鼠急性脑缺血模型,同时构建PC12细胞糖氧剥夺(OGD)模型。缺血24 h后进行神经行为学评分和脑梗死体积测定。ELISA法检测MCAO大鼠结肠内... 目的研究益气解毒方抗急性缺血性脑卒中铁死亡相关保护机制。方法采用大脑中动脉栓塞(MCAO)法复制大鼠急性脑缺血模型,同时构建PC12细胞糖氧剥夺(OGD)模型。缺血24 h后进行神经行为学评分和脑梗死体积测定。ELISA法检测MCAO大鼠结肠内容物中短链脂肪酸(SCFA)含量,普鲁士蓝染色观察缺血侧脑组织Fe^(2+),JC-1和刃天青分别检测缺血侧脑组织线粒体膜电位和活力,并对缺血侧脑组织中亚铁离子、谷胱甘肽(GSH)、丙二醛(MDA)、超氧化物歧化酶(SOD)水平,及血清中三酰甘油(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)含量进行测定。采用分子对接预测益气解毒方与GPX4蛋白的结合度。Western blot法检测大鼠缺血侧脑组织G蛋白偶联受体41(GPR41)、谷胱甘肽过氧化物酶4(GPX4)、p53蛋白表达水平,流式细胞术和Western blot法检测细胞GPX4蛋白表达水平。结果在动物实验中,与模型组相比,益气解毒方中、高剂量组大鼠神经行为评分与脑梗死体积显著降低(P<0.01),结肠内容物中SCFA含量增加(P<0.01),缺血侧脑组织铁离子颗粒物沉积减少,线粒体膜电位升高(P<0.05),线粒体活力显著增加(P<0.01),缺血侧脑组织中GSH、SOD、GPR41、GPX4水平显著升高(P<0.05或P<0.01),Fe^(2+)、MDA、p53水平显著降低(P<0.01),TG、LDL-C显著降低(P<0.05,P<0.01),HDL-C显著增加(P<0.05);在细胞实验中,与OGD组相比,益气解毒方组和Fer-1组能使细胞GPX4蛋白表达增加(P<0.01)。结论益气解毒方抑制铁死亡可能是其发挥急性脑缺血保护作用的又一关键作用机制,其作用可能与GPX4相关通路密切相关。 展开更多
关键词 益气解毒方 急性缺血性脑卒中 铁死亡 短链脂肪酸 GPX4通路
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Summary on Professor QIAO Bao-zhang's Experience in Syndrome Differentiation and Treatment for Pancreatic Cancer
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作者 zhang qi-man ZHENG Jin 《World Journal of Integrated Traditional and Western Medicine》 2020年第11期31-37,共7页
Objective:To summarize clinical experience of Professor QIAO Bao-zhang in treatment for pancreatic cancer,and to provide reference for clinicians.Methods:Through learning from Professor QIAO during his clinical practi... Objective:To summarize clinical experience of Professor QIAO Bao-zhang in treatment for pancreatic cancer,and to provide reference for clinicians.Methods:Through learning from Professor QIAO during his clinical practice and listening to his lectures,Professor QIAO Bao-zhang's clinically proved cases of treating pancreatic cancer based on syndrome differentiation were organized and summarized.From aspects like etiology,pathogenesis,treatment principles and treatment methods of pancreatic cancer,Professor QIAO's experience in diagnosis and treatment for this disease was analyzed and explored,and characteristics of medication were summarized.Two typical cases were selected as proof,and his treatment ideas and methods were explored.Results:Professor QIAO believes that the pathogenesis is mostly deficiency of vital Qi(正气),and stagnation of phlegm,heat and dampness in Zang-Fu(脏腑)and meridians.Around intermingled deficiency and excess,syndrome differentiation and treatment were performed.Due to treatment methods such as strengthening vital Qi to eliminate pathogenic factor,clearing heat,eliminating dampness and resolving phlegm,as well as removing toxicity and resolving hard mass,progress of malignant tumors was inhibited and recurrence and metastasis of malignant tumors were delayed.Conclusion:Professor QIAO's experience in treating pancreatic cancer is worth learning. 展开更多
关键词 QIAO Bao-zhang Pancreatic cancer Syndrome differentiation and treatment Medical record Famous doctor's experience
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小儿感冒宁颗粒对脾虚型功能性消化不良大鼠胃肠运动及血清胃肠激素水平的影响 被引量:2
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作者 李淑婷 吴黎 +4 位作者 杨家霖 蔡冰洁 张琪曼 林鹏飞 李韶菁 《中国现代中药》 CAS 2023年第10期2119-2127,共9页
目的:考察小儿感冒宁颗粒对脾虚型功能性消化不良(FD)大鼠模型的药效作用。方法:特制饲料喂养制备SD大鼠脾虚型FD模型。造模前大鼠随机分为6组,即对照组,模型组,儿宝颗粒组(EB,7.10 g·kg^(-1)·d^(-1)),小儿感冒宁低、中、高... 目的:考察小儿感冒宁颗粒对脾虚型功能性消化不良(FD)大鼠模型的药效作用。方法:特制饲料喂养制备SD大鼠脾虚型FD模型。造模前大鼠随机分为6组,即对照组,模型组,儿宝颗粒组(EB,7.10 g·kg^(-1)·d^(-1)),小儿感冒宁低、中、高剂量组(3.55、7.10、14.20 g·kg^(-1)·d^(-1)),每组10只。除对照组外,其余各组大鼠每日给予特制饲料喂养进行造模。持续造模1周后开始给药,连续20 d。每周2次测定各组大鼠一般状态评分、体质量、24 h进食量、24 h饮水量;给药结束后测定各组大鼠胃排空率、胃重指数、小肠推进率、胸腺指数、脾脏指数;苏木素-伊红(HE)染色法观察大鼠十二指肠、结肠、胃窦部位的组织病理学改变;Image J软件测量小肠绒毛高度、宽度、绒毛间隙、结肠固有层厚度、腺体横截面积、胃窦黏膜浅层破损厚度;酶联免疫吸附法(ELISA)测定血清胃泌素(GAS)、胃动素(MTL)、胆囊收缩素(CCK)、血管活性肠肽(VIP)及瘦素(LEP)含量。结果:与模型组比较,小儿感冒宁颗粒可降低脾虚型FD模型大鼠一般状态评分,缓解体质量增长缓慢及饮水减少,显著增加胃排空率、小肠推进率(P<0.05,P<0.01),改善十二指肠、结肠及胃窦组织病理学特征异常。此外,小儿感冒宁颗粒能够显著升高模型大鼠血清GAS、MTL水平(P<0.05,P<0.01),显著降低血清CCK、VIP、LEP水平(P<0.05,P<0.01)。结论:小儿感冒宁颗粒可通过促进胃排空和小肠推进、调节血清胃肠激素水平起到改善脾虚型FD的作用。 展开更多
关键词 功能性消化不良 脾虚 胃肠激素 小儿感冒宁颗粒
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无线传感器网络中蒙特卡洛定位算法的研究 被引量:3
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作者 张绮曼 张颖 《计算机科学》 CSCD 北大核心 2018年第12期77-80,116,共5页
在无线传感器网络的节点定位领域,常用的以蒙特卡洛为基础的定位算法均存在定位误差大、采样效率低的问题。为了提高无线传感器网络中针对移动节点的采样效率和定位精确度,文中采用马尔科夫链进行抽样,提出了一种基于蒙特卡洛的改进算... 在无线传感器网络的节点定位领域,常用的以蒙特卡洛为基础的定位算法均存在定位误差大、采样效率低的问题。为了提高无线传感器网络中针对移动节点的采样效率和定位精确度,文中采用马尔科夫链进行抽样,提出了一种基于蒙特卡洛的改进算法。该算法在蒙特卡洛算法的基础上,结合马尔科夫链采集节点样本,随后对其进行过滤,再通过对得到的节点位置值进行加权计算,得到节点的准确位置。仿真实验结果表明,通过该算法得到的节点定位误差低于其他算法,提高了采样效率以及对移动节点的定位准确率。 展开更多
关键词 无线传感器网络 蒙特卡洛算法 马尔科夫链 移动节点定位
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Monotropein Induced Apoptosis and Suppressed Cell Cycle Progression in Colorectal Cancer Cells
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作者 GAO Quan LI Lin +4 位作者 zhang qi-man SHENG Qin-song zhang Ji-liang JIN Li-jun SHANG Rui-yan 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2024年第1期25-33,共9页
Objective: To determine whether monotropein has an anticancer effect and explore its potential mechanisms against colorectal cancer(CRC) through network pharmacology and molecular docking combined with experimental ve... Objective: To determine whether monotropein has an anticancer effect and explore its potential mechanisms against colorectal cancer(CRC) through network pharmacology and molecular docking combined with experimental verification. Methods: Network pharmacology and molecular docking were used to predict potential targets of monotropein against CRC. Cell counting kit assay, plate monoclonal assay and microscopic observation were used to investigate the antiproliferative effects of monotropein on CRC cells HCT116, HT29 and LoVo. Flow cytometry and scratch assay were used to analyze apoptosis and cell cycle, as well as cell migration, respectively in HCT116, HT29, and LoVo cells. Western blotting was used to detect the expression of proteins related to apoptosis, cell cycle, and cell migration, and the expression of proteins key to the Akt pathway. Results: The Gene Ontology and Reactome enrichment analyses indicated that the anticancer potential of monotropein against CRC might be involved in multiple cancer-related signaling pathways. Among these pathways, RAC-beta serine/threonine-protein kinase(Akt1, Akt2), cyclin-dependent kinase 6(CDK6), matrix metalloproteinase-9(MMP9), epidermal growth factor receptor(EGFR), cell division control protein 42 homolog(CDC42) were shown as the potential anticancer targets of monotropein against CRC. Molecular docking suggested that monotropein may interact with the 6 targets(Akt1, Akt2, CDK6, MMP9, EGFR, CDC42). Subsequently, cell activity of HCT116, HT29 and LoVo cell lines were significantly suppressed by monotropein(P<0.05). Furthermore, our research revealed that monotropein induced cell apoptosis by inhibiting Bcl-2 and increasing Bax, induced G_1–S cycle arrest in colorectal cancer by decreasing the expressions of CyclinD1, CDK4 and CDK6, inhibited cell migration by suppressing the expressions of CDC42 and MMP9(P<0.05), and might play an anticancer role through Akt signaling pathway. Conclusions: Monotropein exerts its antitumor effects primarily by arresting the cell cycle, causing cell apoptosis, and inhibiting cell migration. This indicates a high potential for developing novel medication for treating CRC. 展开更多
关键词 MONOTROPEIN Chinese medicine anticancer activity colorectal cancer cells network pharmacology
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