期刊文献+
共找到339篇文章
< 1 2 17 >
每页显示 20 50 100
Electroacupuncture preconditioning attenuates ischemic brain injury by activation of the adenosine monophosphate-activated protein kinase signaling pathway 被引量:9
1
作者 Qiang-qiang Ran Huai-long Chen +3 位作者 Yan-li Liu Hai-xia Yu Fei Shi Ming-shan Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第7期1069-1075,共7页
Electroacupuncture has therapeutic effects on ischemic brain injury, but its mechanism is still poorly understood. In this study, mice were stimulated by electroacupuncture at the Baihui(GV20) acupoint for 30 minute... Electroacupuncture has therapeutic effects on ischemic brain injury, but its mechanism is still poorly understood. In this study, mice were stimulated by electroacupuncture at the Baihui(GV20) acupoint for 30 minutes at 1 m A and 2/15 Hz for 5 consecutive days. A cerebral ischemia model was established by ligating the bilateral common carotid artery for 15 minutes. At 72 hours after injury, neuronal injury in the mouse hippocampus had lessened, and the number of terminal deoxynucleotide transferase-mediated d UTP nick-end labeling-positive cells reduced after electroacupuncture treatment. Moreover, expression of adenosine monophosphate-activated protein kinase α(AMPKα) and phosphorylated AMPKα was up-regulated. Intraperitoneal injection of the AMPK antagonist, compound C, suppressed this phenomenon. Our findings suggest that electroacupuncture preconditioning alleviates ischemic brain injury via AMPK activation. 展开更多
关键词 nerve regeneration electroacupuncture cerebral ischemia neuroprotection adenosine monophosphate-activated protein kinase α compound C neurons apoptosis NSFC grant neural regeneration
下载PDF
Metformin attenuates motility,contraction,and fibrogenic response of hepatic stellate cells in vivo and in vitro by activating AMP-activated protein kinase 被引量:11
2
作者 Zhen Li Qian Ding +4 位作者 Li-Ping Ling Ying Wu Dong-Xiao Meng Xiao Li Chun-Qing Zhang 《World Journal of Gastroenterology》 SCIE CAS 2018年第7期819-832,共14页
AIM To investigate the effect of metformin on activated hepatic stellate cells(HSCs) and the possible signaling pathways involved. METHODS A fibrotic mouse model was generated by intraperitoneal injection of carbon te... AIM To investigate the effect of metformin on activated hepatic stellate cells(HSCs) and the possible signaling pathways involved. METHODS A fibrotic mouse model was generated by intraperitoneal injection of carbon tetrachloride(CCl_4) and subsequent treatment with or without metformin. The level of fibrosis was detected by hematoxylin-eosin staining, Sirius Red staining, and immunohistochemistry. The HSC cell line LX-2 was used for in vitro studies. The effect of metformin on cell proliferation(CCK8 assay),motility(scratch test and Transwell assay), contraction(collagen gel contraction assay), extracellular matrix(ECM) secretion(Western blot), and angiogenesis(ELISA and tube formation assay) was investigated. We also analyzed the possible signaling pathways involved by Western blot analysis.RESULTS Mice developed marked liver fibrosis after intraperitoneal injection with CCl_4 for 6 wk. Metformin decreased the activation of HSCs, reduced the deposition of ECM, and inhibited angiogenesis in CCl_4-treated mice. Platelet-derived growth factor(PDGF) promoted the fibrogenic response of HSCs in vitro, while metformin inhibited the activation, proliferation, migration, and contraction of HSCs, and reduced the secretion of ECM. Metformin decreased the expression of vascular endothelial growth factor(VEGF) in HSCs through inhibition of hypoxia inducible factor(HIF)-1α in both PDGF-BB treatment and hypoxic conditions, and it down-regulated VEGF secretion by HSCs and inhibited HSC-based angiogenesis in hypoxic conditions in vitro. The inhibitory effects of metformin on activated HSCs were mediated by inhibiting the Akt/mammalian target of rapamycin(m TOR) and extracellular signal-regulated kinase(ERK) pathways via the activation of adenosine monophosphate-activated protein kinase(AMPK).CONCLUSION Metformin attenuates the fibrogenic response of HSCs in vivo and in vitro, and may therefore be useful for the treatment of chronic liver diseases. 展开更多
关键词 hepatic stellate cell INTRAHEPATIC vascular resistance angiogenesis CONTRACTION liver fibrosis adenosine monophosphate-activated protein kinase
下载PDF
Beneficial effects of metformin on primary cardiomyocytes via activation of adenosine monophosphate-activated protein kinase 被引量:9
3
作者 WANG Xiao-fang ZHANG Jin-ying LI Ling ZHAO Xiao-yan 《Chinese Medical Journal》 SCIE CAS CSCD 2011年第12期1876-1884,共9页
Background Metformin has become a cornerstone in the treatment of patients with type-2 diabetes. Accumulated evidence suggests that metformin supports direct cardiovascular effects. The present study aimed to investig... Background Metformin has become a cornerstone in the treatment of patients with type-2 diabetes. Accumulated evidence suggests that metformin supports direct cardiovascular effects. The present study aimed to investigate if metformin has beneficial effects on primary cardiomyocytes damaged by H2O2, and reveal the potential mechanism of action of metformin. Methods Cardiomyocytes were incubated in the presence of 100μmol/L H2O2 for 12 hours. Cardiomyocytes were pretreated with metformin at different concentrations and time and with aminoimidazole carboxamide ribonucleotide (AICAR) (500μmol/L), an adenosine monophophate (AMP)-activated protein kinase (AMPK) agonist for 60 minutes before the addition of H2O2. Other cells were preincubated with compound C (an AMPK antagonist, 20μmol/L) for 4 hours. The viability and apoptosis of cells were analyzed. AMPK, endothelial nitric oxide synthase (eNOS), and transforming growth factor (TGF)-β1 were analyzed using immunblotting. Results Metformin had antagonistic effects on the influences of H2O2 on cell viability and attenuated oxidative stress-induced apoptosis. Metformin also increased phosphorylation of AMPK and eNOS, and reduced the expression of TGF-β1, basic fibroblast growth factor (bFGF), and tumor necrosis factor (TNF)-α. Conclusions Metformin has beneficial effects on cardiomyocytes, and this effect involves activation of the AMPK-eNOS pathway. Metformin may be potentially beneficial for the treatment of heart disease. 展开更多
关键词 adenosine monophosphate-activated protein kinase cardiomyocyte endothelial nitric oxide synthase METFORMIN transforming growth factor
原文传递
Dan-gua Fang (丹瓜方) Improves Glycolipid Metabolic Disorders by Promoting Hepatic Adenosine 5'-monophosphate Activated Protein Kinase Expression in Diabetic Goto-kakizaki Rats 被引量:12
4
作者 蓝元隆 黄苏萍 +9 位作者 衡先培 陈玲 李鹏辉 吴静 杨柳清 潘旭东 林彤 程心玲 林青 陈斯歆 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2015年第3期188-195,共8页
Objective:To investigate the effect of Dan-gua Fang(丹瓜方) on adenosine 5’-monophosphate(AMP) activated protein kinase(AMPK) α expression in liver and subsequent improvement of glucose and lipid metabolism.M... Objective:To investigate the effect of Dan-gua Fang(丹瓜方) on adenosine 5’-monophosphate(AMP) activated protein kinase(AMPK) α expression in liver and subsequent improvement of glucose and lipid metabolism.Methods:Forty 13-week-old diabetic Goto-Kakizaki(GK) rats were randomly divided into model,Dan-gua Fang,metformin and simvastatin groups(n=10 for each),and fed high-fat diet ad libitum.Ten Wistar rats were used as normal group and fed normal diet.After 24 weeks,liver expression of AMPK α mRNA was assessed by real-time PCR.AMPK α and phospho-AMPK α protein expression in liver was evaluated by Western blot.Liver histomorphology was carried out after hematoxylin-eosin staining,and blood glucose(BG),glycosylated hemoglobin A1c(HbA1c),food intake and body weight recorded.Results:Similar AMPK α mRNA levels were found in the Dan-gua Fang group and normal group,slightly higher than the values obtained for the remaining groups(P〈0.05).AMPK α protein expression in the Dan-gua Fang group animals was similar to other diabetic rats,whereas phospho-AMPK α(Thr-172) protein levels were markedly higher than in the metformin group and simvastatin group(P〈0.05),respectively.However,phosphor-AMPKa/AMPK α ratios were similar in all groups.Dan-gua Fang reduced fasting blood glucose with similar strength to metformin,and was superior in reducing cholesterol,triglycerides,high-density lipoprotein cholesterol as well as improving low-density lipoprotein cholesterol in comparison with simvastatin and metformin.Dan-gua Fang decreases plasma alanine aminotransferase(ALT) significantly.Conclusion:Dan-gua Fang,while treating phlegm-stasis,could decrease BG and lipid in type 2 diabetic GK rats fed with high-fat diet,and effectively protect liver histomorphology and function.This may be partly explained by increased AMPK expression in liver.Therefore,Dan-gua Fang might be an ideal drug for comprehensive Intervention for glucose and lipid metabolism disorders in type 2 diabetes mellitus. 展开更多
关键词 Dan-gua Fang Goto-Kakizaki rat adenosine 5’-monophosphate activated protein kinase type 2 diabetes mellitus liver glucose and lipid metabolism
原文传递
Metformin inhibits nuclear factor-κB activation and inflammatory cytokines expression induced by high glucose via adenosine monophosphate-activated protein kinase activation in rat glomerular mesangial cells in vitro 被引量:9
5
作者 Gu Junfei Ye Shandong Wang Shan Sun Wenjia Hu Yuanyuan 《Chinese Medical Journal》 SCIE CAS CSCD 2014年第9期1755-1760,共6页
Background The renoprotective mechanisms of adenosine monophosphate (AMP)-activated protein kinase (AMPK) agonist-metformin have not been stated clearly.We hypothesized that metformin may ameliorate inflammation v... Background The renoprotective mechanisms of adenosine monophosphate (AMP)-activated protein kinase (AMPK) agonist-metformin have not been stated clearly.We hypothesized that metformin may ameliorate inflammation via AMPK interaction with critical inflammatory cytokines The aim of this study was to observe the effects of metformin on expression of nuclear factor-κB (NF-κB),monocyte chemoattractant protein-1 (MCP-1),intercellular adhesion molecule-1 (ICAM-1) and transforming growth factor-beta 1 (TGF-β1) induced by high glucose (HG) in cultured rat glomerular mesangial cells (MCs).Methods MCs were cultured in the medium with normal concentration glucose (group NG,5.6 mmol/L),high concentration glucose (group HG,25 mmol/L) and different concentrations of metformin (group M1,M2,M3).After 48-hour exposure,the supernatants and MCs were collected.The expression of NF-κB,MCP-1,ICAM-1,and TGF-β1 mRNA was analyzed by real time polymerase chain reaction.Westem blotting was used to detect the expression of AMPK,phospho-Thr-172 AMPK (p-AMPK),NF-κB p65,MCP-1,ICAM-1,and TGF-β1 protein.Results After stimulated by HG,the expression of NF-κB,MCP-1,ICAM-1,TGF-β1 mRNA and protein of MCs in group HG increased significantly compared with group NG (P <0.05).Both genes and protein expression of NF-κB,MCP-1,ICAM-1,TGF-β1 of MCs induced by high glucose were markedly reduced after metformin treatment in a dose-dependent manner (P <0.05).The expression of p-AMPK increased with the rising of metformin concentration,presenting the opposite trend,while the level of total-AMPK protein was unchanged with exposure to HG or metformin.Conlusion Metformin can suppress the expression of NF-κB,MCP-1,ICAM-1 and TGF-β1 of glomerular MCs induced by high glucose via AMPK activation,which may partlv contribute to its reno-protection. 展开更多
关键词 METFORMIN adenosine monophosphate-activated protein kinase nuclear factor-κB monocyte chemoattractant protein-1 intercellular adhesion molecule-1 transforming growth factor-beta 1 glomerular mesangial cell
原文传递
青藤碱调节AMPK/mTOR/ULK1信号通路对IL-1β诱导的关节软骨细胞自噬和凋亡的影响
6
作者 胡宏志 汪能 +2 位作者 李娟 李冰 姚金龙 《疑难病杂志》 CAS 2024年第11期1379-1384,1398,共7页
目的探讨青藤碱(SN)调节单磷酸腺苷活化蛋白激酶(AMPK)/雷帕霉素靶蛋白(mTOR)/UNC-51样激酶1(ULK1)信号通路对白介素-1β(IL-1β)诱导的关节软骨细胞自噬和凋亡的影响。方法将关节软骨细胞分为Control组(正常培养)、IL-1β组(10μg/L的I... 目的探讨青藤碱(SN)调节单磷酸腺苷活化蛋白激酶(AMPK)/雷帕霉素靶蛋白(mTOR)/UNC-51样激酶1(ULK1)信号通路对白介素-1β(IL-1β)诱导的关节软骨细胞自噬和凋亡的影响。方法将关节软骨细胞分为Control组(正常培养)、IL-1β组(10μg/L的IL-1β诱导12 h)、L-SN、M-SN、H-SN组(在IL-1β诱导的基础上添加25、50、100μmol/L的SN)、SN+Compound C组(在H-SN组的基础上添加10μmol/L AMPK抑制剂Compound C)。MTT法、透射电子显微镜(TEM)、流式细胞仪分别检测SN对各组关节软骨细胞增殖、自噬、凋亡的影响;ELISA试剂盒检测各组细胞中COX-2、TNF-α、MMP-3、MMP-13的表达;蛋白印迹实验(WB)检测各组细胞中p-AMPK、AMPK、p-mTOR、mTOR、p-ULK1、ULK1蛋白水平。结果与Control组比较,IL-1β组关节软骨细胞的A 490值、p-AMPK/AMPK、p-ULK1/ULK1蛋白水平降低,自噬空泡数、凋亡率、COX-2、TNF-α、MMP-3、MMP-13、p-mTOR/mTOR蛋白水平升高(P<0.05);与IL-1β组比较,L-SN组、M-SN组、H-SN组A 490值、自噬空泡数、p-AMPK/AMPK、p-ULK1/ULK1蛋白水平升高,凋亡率、COX-2、TNF-α、MMP-3、MMP-13、p-mTOR/mTOR蛋白水平降低(P<0.05);与H-SN组比较,SN+Compound C组A 490值、自噬空泡数、p-AMPK/AMPK、p-ULK1/ULK1蛋白水平降低,凋亡率、COX-2、TNF-α、MMP-3、MMP-13、p-mTOR/mTOR蛋白水平升高(P<0.05)。结论SN可以通过促进IL-1β诱导的关节软骨细胞自噬,抑制细胞凋亡,其机制可能是通过激活AMPK/mTOR/ULK1信号通路实现的。 展开更多
关键词 骨关节炎 青藤碱 单磷酸腺苷活化蛋白激酶 雷帕霉素靶蛋白 UNC-51样激酶1 白介素- 关节软骨细胞 自噬 凋亡
下载PDF
香菇多糖对ApoE^(-/-)小鼠动脉粥样硬化斑块形成及AMPK信号通路的影响
7
作者 郑学斌 黄玉艳 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第7期1411-1415,共5页
目的:探讨香菇多糖(LNT)对ApoE^(-/-)小鼠动脉粥样硬化(AS)斑块形成及单磷酸腺苷活化蛋白激酶(AMPK)信号通路的影响。方法:ApoE^(-/-)小鼠分为模型组、立普妥组(5 mg/kg)、LNT低(5 mg/kg)、中(10 mg/kg)、高(20 mg/kg)剂量组,以相似遗... 目的:探讨香菇多糖(LNT)对ApoE^(-/-)小鼠动脉粥样硬化(AS)斑块形成及单磷酸腺苷活化蛋白激酶(AMPK)信号通路的影响。方法:ApoE^(-/-)小鼠分为模型组、立普妥组(5 mg/kg)、LNT低(5 mg/kg)、中(10 mg/kg)、高(20 mg/kg)剂量组,以相似遗传背景的C57BL/6小鼠为对照组。灌胃给药12周后,全自动生化分析仪检测血清甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白(LDL-C)、高密度脂蛋白(HDL-C)水平;ELISA检测血清IL-6、IL-1β水平;油红O染色观察整体主动脉斑块形成情况;HE染色观察主动脉根部斑块形成情况;蛋白免疫印迹检测主动脉AMPK通路蛋白表达。结果:与对照组比较,模型组血清TC、TG、LDL-C、IL-6、IL-1β水平、主动脉斑块面积、主动脉根部斑块面积、主动脉组织NLRP3、IL-6、IL-1β表达显著升高,主动脉组织p-AMPK/AMPK表达和血清HDL-C水平降低(P<0.05);与模型组比较,立普妥组、LNT中、高剂量组TC、TG、LDL-C、IL-6、IL-1β、主动脉斑块面积、主动脉根部斑块面积、主动脉组织NLRP3、IL-6、IL-1β表达显著降低,主动脉组织p-AMPK/AMPK表达和血清HDL-C水平显著升高,且LNT各剂量组间差异有统计学意义(P<0.05);立普妥组与LNT高剂量组差异无统计学意义(P>0.05)。结论:LNT可能通过激活AMPK通路抑制AS小鼠炎症反应和AS斑块形成。 展开更多
关键词 香菇多糖 ApoE^(-/-)小鼠 动脉粥样硬化 单磷酸腺苷活化蛋白激酶
下载PDF
Slit引导配体2通过调控AMPK/SIRT1-FoxO1信号通路影响糖尿病小鼠视网膜血管损伤的机制研究
8
作者 李天航 顾朝辉 +5 位作者 张月玲 李洁 杜鹃 付燕 陈娜 陈佳菲 《长春中医药大学学报》 2024年第11期1214-1219,共6页
目的 探讨Slit引导配体2(SLIT2)是否通过调控腺苷单磷酸活化蛋白激酶(AMPK)/转录沉默信息调节因子1(SIRT1)-叉头盒蛋白O1(FoxO1)信号通路通过对糖尿病小鼠视网膜血管损伤的影响。方法 30只db/db小鼠随机分为DR组(db/db小鼠)、DR+阴性对... 目的 探讨Slit引导配体2(SLIT2)是否通过调控腺苷单磷酸活化蛋白激酶(AMPK)/转录沉默信息调节因子1(SIRT1)-叉头盒蛋白O1(FoxO1)信号通路通过对糖尿病小鼠视网膜血管损伤的影响。方法 30只db/db小鼠随机分为DR组(db/db小鼠)、DR+阴性对照载体组(DR+sh-NC组)和DR+sh-SLIT2组,每组10只。另选10只db/m小鼠为对照组。DR+sh-NC组和DR+sh-SLIT2组麻醉后分别在双眼玻璃体腔内注射sh-SLIT2的腺相关病毒(AAV)载体。眼底荧光血管造影(FFA)和苏木精伊红染色观察视网膜血管病变;酶联免疫吸附测定检测血清白细胞介素-6(IL-6),肿瘤坏死因子α(TNF-α)和血管内皮生长因子(VEGF)的水平,荧光定量PCR检测SLIT2 mRNA表达;Western blot检测视网膜组织SLIT2、AMPK、SIRT1、FoxO1蛋白水平。结果 与对照组相比,DR组、DR+sh-NC组、DR+sh-SLIT2组血糖、每日饮水量、每日排尿量、食物摄入量及体质量均明显升高(P<0.05);与对照组相比,DR组视网膜存在血管病变及病理损伤,SLIT2 mRNA及蛋白表达、IL-6、TNF-α和VEGF水平,FoxO1蛋白水平均明显升高(P<0.05),AMPK、SIRT1蛋白水平均明显降低(P<0.05);与DR+sh-NC组相比,DR+sh-SLIT2组的视网膜血管病变及病理损伤明显减轻,SLIT2 mRNA及蛋白表达、IL-6、TNF-α和VEGF水平,FoxO1蛋白水平均明显降低(P<0.05),AMPK、SIRT1蛋白水平均明显升高(P<0.05)。结论 沉默SLIT2表达显著改善糖尿病小鼠视网膜血管损伤及炎症水平,这可能是通过调控AMPK/SIRT1-FoxO1信号通路发挥作用的。 展开更多
关键词 Slit引导配体2 腺苷单磷酸活化蛋白激酶 转录沉默信息调节因子1 叉头盒蛋白O1 糖尿病视网膜病变
下载PDF
基于AMPK/mTOR信号通路探讨人参-黄芪对人胃癌细胞自噬的影响
9
作者 张海洋 陈思鼎 +5 位作者 施妙璇 郑薇 韩美奕 丁治国 季双双 田明 《陕西中医》 CAS 2024年第6期723-727,共5页
目的:探究益气扶正药人参-黄芪对人胃癌细胞自噬的影响,并探讨腺苷酸活化蛋白激酶(AMPK)/哺乳动物雷帕霉素靶蛋白(mTOR)信号通路在其中的作用机制。方法:将人胃癌细胞株(SGC-7901)随机分为对照组(人参-黄芪0 mg/ml)和人参-黄芪组(1、2、... 目的:探究益气扶正药人参-黄芪对人胃癌细胞自噬的影响,并探讨腺苷酸活化蛋白激酶(AMPK)/哺乳动物雷帕霉素靶蛋白(mTOR)信号通路在其中的作用机制。方法:将人胃癌细胞株(SGC-7901)随机分为对照组(人参-黄芪0 mg/ml)和人参-黄芪组(1、2、4、8、16、32、64 mg/ml),经药物处理后,CCK-8法观察人胃癌细胞增殖情况;筛选最佳浓度并将其作为后续实验中的实验组;MDC免疫荧光染色观察细胞自噬情况;Western blot法检测人胃癌细胞自噬相关蛋白(Beclin-1、LC3B)及AMPK/mTOR信号通路相关蛋白(AMPK、p-AMPK、mTOR及p-mTOR)的表达情况。结果:CCK-8法结果显示,人参-黄芪组人胃癌细胞增殖作用降低(P<0.01),且呈浓度依赖性;MDC染色荧光检测显示实验组的荧光强度显著增强(P<0.01),表明人参-黄芪可以诱导人胃癌细胞产生自噬;Western blot结果显示,实验组的Beclin-1、LC3B、p-AMPK/AMPK蛋白表达水平上升(P<0.01),p-mTOR/mTOR蛋白表达水平下降(P<0.01)。结论:人参-黄芪配伍能够抑制人胃癌细胞的增殖、促进人胃癌细胞自噬,其机制可能与激活AMPK/mTOR信号通路相关。 展开更多
关键词 胃癌 人参 黄芪 腺苷酸激活蛋白激酶 雷帕霉素靶蛋白 自噬
下载PDF
腺苷酸活化蛋白激酶-哺乳动物雷帕霉素靶蛋白通路介导线粒体自噬在男性生殖中的研究进展
10
作者 付远杰 朱坤 +3 位作者 申毅锋 俞旭君 常德贵 董良 《中国性科学》 2024年第9期18-23,共6页
线粒体自噬是指细胞利用自噬机制选择性地降解受损或多余线粒体的过程。近年来,有证据表明线粒体自噬在男性生殖中至关重要,其可清除异常的线粒体,从而减少氧化应激并维持生殖细胞的能量稳态。作为调控细胞生长代谢的经典通路,腺苷酸活... 线粒体自噬是指细胞利用自噬机制选择性地降解受损或多余线粒体的过程。近年来,有证据表明线粒体自噬在男性生殖中至关重要,其可清除异常的线粒体,从而减少氧化应激并维持生殖细胞的能量稳态。作为调控细胞生长代谢的经典通路,腺苷酸活化蛋白激酶(AMPK)-哺乳动物雷帕霉素靶蛋白(mTOR)通路通过产生自噬装置,调控线粒体蛋白,可促进自噬体包裹线粒体等过程,从而介导线粒体自噬。本文对AMPK-mTOR通路在下丘脑-垂体-性腺(HPG)轴中枢水平及性腺水平调节线粒体自噬的机制作一综述,以期为改善精子质量提供新的观点和思路。 展开更多
关键词 腺苷酸活化蛋白激酶 哺乳动物雷帕霉素靶蛋白 男性生殖 线粒体自噬
下载PDF
Amino acids regulate energy utilization through mammalian target of rapamycin complex 1 and adenosine monophosphate activated protein kinase pathway in porcine enterocytes 被引量:3
11
作者 Hao Xiao Cuifang Zha +2 位作者 Fangyuan Shao Li Wang Bi’e Tan 《Animal Nutrition》 SCIE 2020年第1期98-106,共9页
As major fuels for the small intestinal mucosa,dietary amino acids(AA)are catabolized in the mitochondria and serve as sources of energy production.The present study was conducted to investigate AA metabolism that sup... As major fuels for the small intestinal mucosa,dietary amino acids(AA)are catabolized in the mitochondria and serve as sources of energy production.The present study was conducted to investigate AA metabolism that supply cell energy and the underlying signaling pathways in porcine enterocytes.Intestinal porcine epithelial cells(IPEC-J2)were treated with different concentrations of AA,inhibitor,or agonist of mammalian target of rapamycin complex 1(mTORCl)and adenosine monophosphate activated protein kinase(AMPK),and mitochondrial respiration was monitored.The results showed that AA treatments resulted in enhanced mitochondrial respiration,increased intracellular content of pyruvic acid and lactic acid,and increased hormone-sensitive lipase mRNA expression.Meanwhile,decreased citrate synthase,isocitrate dehydrogenase alpha,and carnitine palmitoyltransferase 1 mRNA expression were also observed.We found that AA treatments increased the protein levels of phosphorylated mammalian target of rapamycin(p-mTOR),phosphorylated-p70 ribosomal protein S6 kinase,and phosphorylated-4 E-binding protein 1.What is more,the protein levels of phosphorylated AMPKα(pAMPKa)and nicotinamide adenine dinucleotide(NAD)-dependent protein deacetylase sirtuin-1(SIRT1)were decreased by AA treatments in a time depending manner.Mitochondrial bioenergetics and the production of tricarboxylic acid cycle intermediates were decreased upon inhibition of mTORCl or AMPK.Moreover,AMPK activation could up-regulate the mRNA expressions of inhibitor of nuclear factor kappa-B kinase subunit beta(Ikbk(3),integrin-linked protein kinase(ILK),unconventional myosin-Ic(Myolc),ribosomal protein S6 kinase beta-2(RPS6 Kβ2),and vascular endothelial growth factor(VEGF)-β,which are downstream effectors of mammalian target of rapamycin(mTOR).The mRNA expressions of phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoform(PIK3 CD)and5’-AMP-activated protein kinase subunit gamma-1(PRKAG1),which are upstream regulators of mTOR,were also up-regulated by AMPK activation.On the other hand,AMPK activation also down-regulated FK506-binding protein 1 A(FKBP1 A),serine/threonine-protein phosphatase 2 A 55 kDa regulatory subunit B beta isoform,phosphatase and tensin homolog(PTEN),and unc-51 like autophagy activating kinase 1(Ulkl),which are up-stream regulators of mTORCl.Taken together,these data indicated that AA regulated cellular energy metabolism through mTOR and AMPK pathway in porcine enterocytes.These results demonstrated interactions of AMPK and mTORCl pathways in AA catabolism and energy metabolism in intestinal mucosa cells of piglets,and also provided reference for using AA to remedy human intestinal diseases. 展开更多
关键词 Amino acids Mammalian target of RAPAMYCIN adenosine monophosphate activated PROTEIN kinase Mitochondrial respiration Energy utilization
原文传递
SIRT6过表达激活AMPK/Nrf2/HO-1通路抑制AngⅡ诱导的心肌细胞凋亡
12
作者 卢振华 沈静 +2 位作者 黄文军 孙伟 马勇翔 《中国动脉硬化杂志》 CAS 2024年第8期663-668,676,共7页
[目的]探讨沉默调节蛋白6(SIRT6)过表达抑制血管紧张素Ⅱ(AngⅡ)诱导的心肌细胞凋亡是否涉及腺苷酸活化蛋白激酶/核因子E2相关因子2/血红素加氧酶1(AMPK/Nrf2/HO-1)信号通路的激活。[方法]将实验分为4组:对照组、AngⅡ组、AngⅡ+SIRT6组... [目的]探讨沉默调节蛋白6(SIRT6)过表达抑制血管紧张素Ⅱ(AngⅡ)诱导的心肌细胞凋亡是否涉及腺苷酸活化蛋白激酶/核因子E2相关因子2/血红素加氧酶1(AMPK/Nrf2/HO-1)信号通路的激活。[方法]将实验分为4组:对照组、AngⅡ组、AngⅡ+SIRT6组和AngⅡ+空载体(EV)组,通过RT-PCR检测SIRT6的mRNA水平,MTT法检测细胞活性,流式细胞术检测细胞凋亡率,Western blot检测SIRT6、心肌细胞凋亡相关蛋白(Bax、cleaved Caspase-3、Bcl-2)、DNA损伤相关蛋白(γ-H2AX、p-ATM)及AMPK/Nrf2/HO-1信号通路相关蛋白(p-AMPK、Nrf2、HO-1)的表达水平,DCFH-DA染色法测定活性氧(ROS)含量,比较各组间上述指标的变化情况。[结果]与对照组相比,AngⅡ组SIRT6的mRNA、蛋白表达水平及细胞活性明显降低,细胞凋亡率增高,Bax、cleaved Caspase-3表达升高,Bcl-2表达降低,γ-H2AX、p-ATM蛋白表达升高,p-AMPK、Nrf2、HO-1蛋白表达降低,ROS活性增高(均P<0.01)。与AngⅡ+EV组相比,AngⅡ+SIRT6组SIRT6水平及细胞活性增高,细胞凋亡及Bax、cleaved Caspase-3表达降低,Bcl-2表达升高,γ-H2AX、p-ATM蛋白表达降低,p-AMPK、Nrf2、HO-1蛋白表达升高,ROS的活性降低(均P<0.01)。[结论]SIRT6过表达抑制AngⅡ诱导的心肌细胞凋亡与AMPK/Nrf2/HO-1信号通路的激活有关。 展开更多
关键词 沉默调节蛋白6 腺苷酸环化蛋白激酶/核因子E2相关因子2/血红素加氧酶1 氧化应激 DNA损伤 细胞凋亡
下载PDF
Effects of Ginsenoside Rb1 on Skeletal Muscle Insulin Resistance and Adenosine Monophosphate?activated Protein Kinase Signaling Pathway in Obese Mice 被引量:2
13
作者 Dan-Dan Zhao Ying Bai +7 位作者 Rui Wu Fang-Fang Mo Chen-Yue Liu Ru-Yuan Zhu Guang-Jian Jiang Jia-Xian Liu Dong-Wei Zhang Si-Hua Gao 《World Journal of Traditional Chinese Medicine》 2019年第1期42-49,共8页
Objectives: The objective of the study is to observe the effects of ginsenoside Rb1 on indexes of body weight, body composition, blood lipid, skeletal muscle endurance, and insulin sensitivity in obese mice, probe int... Objectives: The objective of the study is to observe the effects of ginsenoside Rb1 on indexes of body weight, body composition, blood lipid, skeletal muscle endurance, and insulin sensitivity in obese mice, probe into its pharmacological action, and further explore its effects on adenosine monophosphate-activated protein kinase(AMPK) signaling pathway in skeletal muscle. Materials and Methods: Eight-week-old C57 BL/6 J mice were fed with high-fat diet for 12 weeks to establish obese mouse model. The model-establishment obese mice were randomly divided into three groups including model control group, metformin group, and ginsenoside Rb1 group. In the normal control group, normal diet was administered. The intervention period was 8 weeks. Body weight and food intake of the mice were measured regularly every week. The treadmill test was performed at weeks 3 and 7, and the oral glucose tolerance test was carried out at weeks 4 and 8. Body composition of the mice was detected by applying NMR Animal Body Composition Analyzer at week 8. Four parameters of blood lipids and free fatty acid(FFA)levels were detected. The m RNA expression of AMPKα and proliferator-activated receptor gamma coactivator-1α(PGC-1α) in skeletal muscle was examined by real-time fluorescence quantitative polymerase chain reaction, and the influence of ginsenoside Rb1 on protein expression of AMPKα, p-AMPKα, and PGC-1α was observed by western blotting. Results: The body weight(since the 5 th week of drug administration)and food intake of the mice in the ginsenoside Rb1 group were significantly lower than those in the model control group(P < 0.05) in a time-dependent manner. Ginsenoside Rb1 could significantly reduce the levels of triglyceride and low-density lipoprotein cholesterol, while increase the high-density lipoprotein cholesterol level(P < 0.05). In addition, ginsenoside Rb1 could reduce the serum FFA level(P < 0.05).After the administration of ginsenoside Rb1 for 8 weeks, the body fat mass of obese mice decreased and the lean mass increased(P < 0.05).The skeletal muscle endurance and the oral glucose tolerance of the obese mice improved using ginsenoside Rb1. At the molecular level,ginsenoside Rb1 could up-regulate the mRNA and protein expression of AMPKα in skeletal muscle, and increase the content of p-AMPK protein significantly(P < 0.01). At the same time, the mRNA and protein level of PGC-1α was also un-regulated, correspondingly(P < 0.01).Conclusion: Ginsenoside Rb1 exerts effects on reducing body weight, decreasing blood lipid levels, enhancing the skeletal muscle endurance,and increasing the insulin sensitivity in obese mice by activating the related proteins in AMPK signaling pathway in skeletal muscle. 展开更多
关键词 adenosine monophosphate-activated protein kinase signaling pathway GINSENOSIDE RB1 insulin resistance obesity skeletal muscle
原文传递
电针介导AMPK/GFAT-1/VEGF对缺血性脑卒中小鼠脑血流量及运动功能的影响
14
作者 邢馨玉 钟文 +1 位作者 谢玉华 崔帅 《安徽中医药大学学报》 CAS 2024年第4期47-52,共6页
目的观察电针“百会”“大椎”穴对缺血性脑卒中小鼠脑血流量及运动功能的影响,揭示腺苷酸活化蛋白激酶(adenosine 5′-monophosphate-activated protein kinase,AMPK)/谷氨酰胺-6-磷酸果糖转氨酶-1(glutamine-fructose-6-phosphate ami... 目的观察电针“百会”“大椎”穴对缺血性脑卒中小鼠脑血流量及运动功能的影响,揭示腺苷酸活化蛋白激酶(adenosine 5′-monophosphate-activated protein kinase,AMPK)/谷氨酰胺-6-磷酸果糖转氨酶-1(glutamine-fructose-6-phosphate aminotransferase-1,GFAT-1)/血管内皮生长因子(vascular endothelial growth factor,VEGF)分子通路参与电针减轻血管损伤,改善肢体运动功能的作用机制。方法将C57雄性小鼠随机分为假手术组、模型组、电针组,每组6只。采用光栓法制备缺血性脑卒中小鼠模型。采用走格子测试和爬杯实验评估小鼠运动功能;TTC染色和激光散斑血流成像仪评估脑梗死体积与脑血流灌注量变化;Western blot法检测AMPK、磷酸化AMPK(phosphorylated AMPK,p-AMPK)、GFAT-1、VEGF的表达水平。结果与假手术组比较,模型组小鼠运动功能受损(P<0.05),脑梗死体积增加(P<0.05),脑血流灌注量减少(P<0.05),AMPK、p-AMPK、VEGF蛋白表达水平显著降低(P<0.05),GFAT-1蛋白表达水平显著升高(P<0.05)。与模型组比较,电针组小鼠运动功能显著改善(P<0.05),脑梗死体积显著减小(P<0.05),脑血流灌注量显著增加(P<0.05),AMPK、p-AMPK、VEGF蛋白表达水平均显著升高(P<0.05),GFAT-1蛋白表达水平显著降低(P<0.05)。结论电针可能通过介导AMPK/GFAT-1/VEGF分子通路,参与改善脑皮质缺血所致脑血管损伤和运动功能障碍。 展开更多
关键词 缺血性脑卒中 电针 腺苷酸活化蛋白激酶 谷氨酰胺-6-磷酸果糖转氨酶-1 血管内皮生长因子
下载PDF
丁酸钠经AMPK/Nrf2/HO-1信号通路调节脂多糖诱导肺泡巨噬细胞极化的作用机制
15
作者 陈健 周卫东 +2 位作者 王艳华 刘勤富 杨晓军 《中国急救医学》 CAS CSCD 2024年第2期156-163,共8页
目的探讨丁酸钠(sodium butyrate,SB)对脂多糖(lipopolysaccharide,LPS)诱导肺泡巨噬细胞极化的影响及其作用机制。方法小鼠肺泡巨噬细胞(MH-S细胞)随机分为对照(Control)组、LPS组、SB组、LPS+SB(LB)组、LPS+SB+腺苷酸活化蛋白激酶(AM... 目的探讨丁酸钠(sodium butyrate,SB)对脂多糖(lipopolysaccharide,LPS)诱导肺泡巨噬细胞极化的影响及其作用机制。方法小鼠肺泡巨噬细胞(MH-S细胞)随机分为对照(Control)组、LPS组、SB组、LPS+SB(LB)组、LPS+SB+腺苷酸活化蛋白激酶(AMPK)抑制剂(Compound C)(LC)组、LPS+SB+核因子E2相关因子2(Nrf2)抑制剂(ML385)(LM)组。通过CCK8检测MH-S细胞活力,筛选出最佳的1000 ng/mL LPS、1 mmol/L SB、10μmol/L Compound C、5μmol/L ML385药物浓度进行后续实验;实时荧光定量(qRT-PCR)检测MH-S细胞白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、白细胞介素-10(IL-10)、白细胞分化抗原86(CD86)、巨噬细胞甘露糖受体(CD206)、AMPK、Nrf2和血红素加氧酶1(HO-1)的mRNA表达水平;酶联免疫吸附试验(ELISA)检测培养基上清IL-6、TNF-α、IL-1β和IL-10蛋白含量;流式细胞术测定M1和M2型巨噬细胞相关标记物CD86和CD206的表达。各组数据通过单因素方差分析和Tukey法进行检验。结果通过CCK8选取了1000 ng/mL LPS、1 mmol/L SB、10μmol/L Compound C和5μmol/L ML385进行造模和干预。qRT-PCR和ELISA结果一致显示,与LPS组比较,LB组M1型巨噬细胞相关促炎细胞因子IL-6、TNF-α、IL-1β显著降低(均P<0.01),但M2型巨噬细胞相关抑炎细胞因子IL-10显著升高(均P<0.01)。qRT-PCR和流式细胞术结果一致显示,与Control组比较,LPS组CD86水平显著升高(均P<0.01),SB组差异无统计学意义;与LPS组比较,LB组CD86表达水平显著降低(均P<0.01),但M2型巨噬细胞标记物CD206的变化趋势与CD86相反。qRT-PCR结果显示,与LPS组比较,LB组促进AMPK/Nrf2/HO-1的表达(均P<0.05);与LB组比较,LC组降低了AMPK/Nrf2/HO-1的表达(均P<0.05),LM组降低了Nrf2/HO-1的表达(均P<0.05)。流式细胞术结果显示,与LB组比较,LC组和LM组逆转了SB对CD86水平的抑制作用(均P<0.01);M2型巨噬细胞标记物CD206的表达趋势与M1型巨噬细胞标记物CD86相反。结论SB通过激活AMPK/Nrf2/HO-1信号通路,抑制LPS诱导的M1型、促进M2型肺泡巨噬细胞极化,改善了炎症反应。 展开更多
关键词 丁酸钠 巨噬细胞极化 炎症 白细胞分化抗原86 巨噬细胞甘露糖受体 腺苷酸活化蛋白激酶 核因子E2相关因子2 血红素加氧酶1
下载PDF
艾司氯胺酮对大鼠心肌缺血再灌注损伤及 AMPK-mTOR通路相关蛋白的影响
16
作者 贺燕羽 阳仲琴 +3 位作者 郭娜 马凤莲 周瑜 王婷 《检验医学与临床》 CAS 2024年第14期2040-2046,共7页
目的探讨艾司氯胺酮对大鼠心肌缺血再灌注损伤(MIRI)及腺苷-磷酸活化蛋白激酶(AMPK)-哺乳动物雷帕霉素靶蛋白(mTOR)通路相关蛋白的影响。方法构建MIRI大鼠模型,将大鼠分为Control组、MIRI组、艾司氯胺酮低剂量组(KET-L组)、艾司氯胺酮... 目的探讨艾司氯胺酮对大鼠心肌缺血再灌注损伤(MIRI)及腺苷-磷酸活化蛋白激酶(AMPK)-哺乳动物雷帕霉素靶蛋白(mTOR)通路相关蛋白的影响。方法构建MIRI大鼠模型,将大鼠分为Control组、MIRI组、艾司氯胺酮低剂量组(KET-L组)、艾司氯胺酮高剂量组(KET-H组)、艾司氯胺酮高剂量+AMPK抑制剂Compound C组(KET-H+CC组)。采用HE染色观察心肌组织病理形态变化;采用酶联免疫吸附试验(ELISA)检测心肌损伤标志物肌酸激酶同工酶(CK-Mb)、肌钙蛋白I(cTnI)、肌钙蛋白T(cTnT)水平;采用透射电镜观察心肌细胞线粒体形态变化;采用免疫组化法检测自噬相关蛋白微管相关蛋白轻链3Ⅱ(LC3Ⅱ)、重组人自噬效应蛋白(Beclin-1)表达水平;采用原位末端标记法(TUNEL)染色检测心肌组织细胞凋亡情况;采用蛋白免疫印迹法(Western blot)检测B细胞淋巴瘤因子2相关X蛋白(Bax)、B细胞淋巴瘤因子2(Bcl-2)、AMPK、磷酸化的腺苷-磷酸活化蛋白激酶(p-AMPK)、mTOR、磷酸化雷帕霉素靶蛋白(p-mTOR)的表达。结果与Control组相比,MIRI组大鼠心肌纤维排列紊乱,心肌细胞肥大且结构模糊,细胞核固缩、核膜皱缩,炎症细胞浸润明显,线粒体结构紊乱,嵴断裂甚至消失,MIRI严重,CK-Mb、cTnI、cTnT、LC3Ⅱ、Beclin-1、Bax表达水平,以及细胞凋亡率、p-mTOR/mTOR升高(P<0.05),Bcl-2表达水平、p-AMPK/AMPK降低(P<0.05);与MIRI组相比,KET-L组、KET-H组心肌细胞损伤减轻,炎症细胞浸润减少,CK-Mb、cTnI、cTnT、LC3Ⅱ、Beclin-1、Bax表达水平,以及细胞凋亡率、p-mTOR/mTOR降低(P<0.05),Bcl-2表达水平、p-AMPK/AMPK升高(P<0.05),且KET-H组优于KET-L组(P<0.05);与KET-H组相比,KET-H+CC组心肌损伤加重,线粒体膜消失,嵴断裂或者消失,CK-Mb、cTnI、cTnT、LC3Ⅱ、Beclin-1、Bax表达水平,以及细胞凋亡率、p-mTOR/mTOR升高(P<0.05),Bcl-2表达水平、p-AMPK/AMPK降低(P<0.05)。结论艾司氯胺酮可能通过激活AMPK-mTOR通路降低线粒体自噬水平,减少心肌细胞凋亡,减轻心肌损伤,缓解大鼠MIRI。 展开更多
关键词 艾司氯胺酮 腺苷-磷酸活化蛋白激酶 雷帕霉素靶蛋白 心肌缺血再灌注损伤 线粒体自噬 凋亡
下载PDF
子痫前期患者血清腺苷活化蛋白激酶水平与可溶性血管内皮生长因子受体-1及氧化应激的相关性
17
作者 龙彬梅 黄超林 《成都医学院学报》 CAS 2024年第2期318-321,共4页
目的 分析子痫前期(PE)患者血清腺苷活化蛋白激酶(AMPK)水平与可溶性血管内皮生长因子受体-1(sFlt-1)及氧化应激的相关性。方法 选取2020年6月至2023年4月在成都医学院第一附属医院治疗的67例PE患者为试验组,选择本院同期住院的正常分... 目的 分析子痫前期(PE)患者血清腺苷活化蛋白激酶(AMPK)水平与可溶性血管内皮生长因子受体-1(sFlt-1)及氧化应激的相关性。方法 选取2020年6月至2023年4月在成都医学院第一附属医院治疗的67例PE患者为试验组,选择本院同期住院的正常分娩孕妇50名为对照组。比较两组AMPK、sFlt-1和氧化应激反应水平[丙二醛(MDA)、超氧化物歧化物(SOD)];分析试验组不同严重程度的PE患者AMPK、sFlt-1、MDA、SOD水平差异;利用多变量逻辑回归方法对妊娠女性发病风险因子进行分析;分析试验组患者AMPK、sFlt-1与氧化应激的相关性。结果 试验组患者AMPK、sFlt-1、MDA水平均高于对照组,SOD水平低于对照组(P<0.05);轻度PE组的AMPK、sFlt-1、MDA水平均低于重度PE组,SOD高于重度PE组(P<0.05);两组妊娠期患糖尿病情况和AMPK、sFlt-1、MDA、SOD水平比较,差异有统计学意义(P<0.05);经多元Logistic回归分析显示,妊娠期合并糖尿病和AMPK、sFlt-1、MDA、SOD水平是影响孕妇发生PE的危险因素(P<0.05);Pearson相关性分析显示,PE患者AMPK、sFlt-1与MDA水平呈正相关,与SOD水平呈负相关(P<0.05)。结论 PE患者AMPK、sFlt-1水平出现异常升高,AMPK、sFlt-1水平与氧化应激指标存在一定相关性。 展开更多
关键词 子痫前期 血清腺苷活化蛋白激酶 可溶性血管内皮生长因子受体-1 氧化应激
下载PDF
微RNA-375-5p对心力衰竭大鼠的保护作用及机制
18
作者 廖明巧 任伟 李中谋 《新乡医学院学报》 CAS 2024年第6期508-514,共7页
目的探讨微RNA(miR)-375-5p对心力衰竭(HF)大鼠的保护作用及相关机制。方法将50只雄性Sprague Dawley大鼠随机分为假手术组、HF组、miR-NC组、miR-375-5p组、miR-375-5p+Compound C(CC)组,每组10只。HF组、miR-NC组、miR-375-5p组、miR-... 目的探讨微RNA(miR)-375-5p对心力衰竭(HF)大鼠的保护作用及相关机制。方法将50只雄性Sprague Dawley大鼠随机分为假手术组、HF组、miR-NC组、miR-375-5p组、miR-375-5p+Compound C(CC)组,每组10只。HF组、miR-NC组、miR-375-5p组、miR-375-5p+CC组大鼠腹腔注射阿霉素溶液制备HF模型,假手术组大鼠腹腔注射等量的NaCl溶液。造模结束后次日,miR-375-5p组大鼠经尾静脉注射miR-375-5p mimics 100μL,miR-NC组大鼠经尾静脉注射miR-NC mimics 100μL,假手术组和HF组大鼠经尾静脉注射等量生理盐水,miR-375-5p+CC组大鼠经尾静脉注射miR-375-5p mimics 100μL和腺苷酸活化蛋白激酶(AMPK)抑制剂CC(0.2 mg·kg^(-1));各组大鼠均每日给药1次,连续给药4周。使用彩色多普勒超声仪检测各组大鼠心功能指标,反转录聚合酶链反应检测各组大鼠心肌组织中miR-375-5p表达,酶联免疫吸附试验检测各组大鼠血清中肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-6、IL-1β、丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽(GSH)水平,苏木精-伊红染色观察各组大鼠心肌组织病理学变化,末端脱氧核苷酸转移酶介导的末端标记法检测各组大鼠心肌细胞凋亡情况,蛋白质印迹检测各组大鼠心肌组织中磷酸化腺苷酸活化蛋白激酶(p-AMPK)、AMPK、沉默信息调节因子3(SIRT3)蛋白的相对表达量。结果与假手术组比较,HF组、miR-NC组和miR-375-5p组大鼠的左心室射血分数(LVEF)、左心室短轴缩短率(LVFS)、血清中SOD活性、GSH水平及心肌组织中p-AMPK/AMPK、miR-375-5p表达量和SIRT3蛋白相对表达量显著降低,左心室舒张末期内径(LVEDD)、左心室收缩末期内径(LVESD)、心肌细胞凋亡率及血清中TNF-α、IL-6、IL-1β、MDA水平显著升高(P<0.05)。miR-NC组与HF组大鼠LVEF、LVFS、LVEDD、LVESD、心肌细胞凋亡率、血清中TNF-α、IL-6、IL-1β、MDA、GSH水平、SOD活性、心肌组织中p-AMPK/AMPK、miR-375-5p表达量及SIRT3蛋白相对表达量比较差异无统计学意义(P>0.05)。与HF组相比,miR-375-5p组大鼠LVEF、LVFS、血清中SOD活性、GSH水平、心肌组织中p-AMPK/AMPK及miR-375-5p表达量和SIRT3蛋白相对表达量显著升高,LVEDD、LVESD、心肌细胞凋亡率及血清中TNF-α、IL-6、IL-1β、MDA水平显著降低(P<0.05)。与miR-375-5p组相比,miR-375-5p+CC组大鼠LVEF、LVFS、血清中SOD活性、GSH水平及心肌组织中p-AMPK/AMPK、miR-375-5p表达量和SIRT3蛋白相对表达量显著降低,LVEDD、LVESD、心肌细胞凋亡率及血清中TNF-α、IL-6、IL-1β、MDA水平显著升高(P<0.05)。假手术组大鼠心肌细胞规律排列,细胞核明显且无炎症细胞浸润;HF组大鼠心肌细胞形态发生明显改变,排列紊乱,细胞间隙变大,染色变浅,且出现心肌纤维化,有大量的炎症细胞浸润,HF组和miR-NC组大鼠心肌组织病理学变化无明显差异;与HF组相比,miR-375-5p组大鼠心肌细胞排列明显有序,细胞坏死程度和范围明显减少;miR-375-5p+CC组与HF组大鼠心肌组织病理学变化相似。结论miR-375-5p能抑制HF大鼠心肌细胞凋亡,进而对HF大鼠发挥保护作用,其机制可能与激活AMPK/SIRT3信号通路有关。 展开更多
关键词 微RNA-375-5p 腺苷酸活化蛋白激酶/沉默信息调节因子3信号通路 心力衰竭 心肌细胞凋亡
下载PDF
LncRNA PFL通过AMPK-PPARα信号通路改善心肌纤维化 被引量:1
19
作者 李庆勇 汤宝鹏 +3 位作者 牛锁成 申文祥 周贤惠 芦颜美 《中国老年学杂志》 CAS 北大核心 2023年第9期2181-2185,共5页
目的研究促纤维化长链非编码RNA(LncRNA PFL)改善压力负荷诱导的心肌纤维化同腺苷酸活化蛋白激酶(AMPK)-过氧化物酶增殖激活的α亚型受体(PPAR)α信号通路的激活是否相关。方法将60只大鼠随机分为A(假手术)组、B(压力负荷诱导的心肌纤... 目的研究促纤维化长链非编码RNA(LncRNA PFL)改善压力负荷诱导的心肌纤维化同腺苷酸活化蛋白激酶(AMPK)-过氧化物酶增殖激活的α亚型受体(PPAR)α信号通路的激活是否相关。方法将60只大鼠随机分为A(假手术)组、B(压力负荷诱导的心肌纤维化模型)组、C(压力负荷诱导的心肌纤维化模型+LncRNA PFL抑制剂)组。采用苏木素-伊红(HE)染色检测心肌组织的病理形态和纤维化程度,羟脯氨酸(HYP)检测心肌质量,Western印迹测定心肌组织中AMPK、PPARα蛋白水平。结果与A组比较,B组和C组心脏重量指数(HWI)和左心室重量指数(LVWI)均显著升高(P<0.01);与B组比较,C组显著下降(P<0.01)。HE染色结果:与A组比较,B组和C组心肌细胞的炎症浸润和细胞间胶原纤维均显著增加,神经元细胞损伤程度加重(P<0.05);与B相比,C组显著好转(P<0.05)。免疫荧光结果:B组AMPK及PPARα蛋白水平明显低于A组和C组,且C组明显低于A组。RT-qPCR及Western印迹结果:B组心肌组织中AMPK和PPARαmRNA及蛋白表达显著低于A组和C组,且C组显著高于A组(P<0.05)。结论LncRNA PFL表达下调改善压力负荷诱导的心肌纤维化与激活AMPK-α信号通路有关。 展开更多
关键词 促纤维化长链非编码RNA(LncRNA PFL) 腺苷酸活化蛋白激酶(AMPK)-过氧化物酶增殖激活的α亚型受体(PPAR)α信号通路 压力负荷 心肌纤维化
下载PDF
微小RNA-19a-3p对充血性心力衰竭模型大鼠心肌纤维化的影响及机制研究 被引量:1
20
作者 刘鹏 陈阵 《陕西医学杂志》 CAS 2023年第9期1125-1129,1134,共6页
目的:探讨微小RNA-19a-3p(miR-19a-3p)对充血性心力衰竭(CHF)模型大鼠心肌纤维化的影响及机制。方法:将60只SD大鼠随机分为NC组、Model组、NC agomir组(尾静脉注射NC agomir)、miR-19a-3p agomir组(尾静脉注射miR-19a-3p agomir)、miR-1... 目的:探讨微小RNA-19a-3p(miR-19a-3p)对充血性心力衰竭(CHF)模型大鼠心肌纤维化的影响及机制。方法:将60只SD大鼠随机分为NC组、Model组、NC agomir组(尾静脉注射NC agomir)、miR-19a-3p agomir组(尾静脉注射miR-19a-3p agomir)、miR-19a-3p agomir+腺苷酸活化蛋白激酶(AMPK)抑制剂Compound C组(尾静脉注射miR-19a-3p agomir和250μg/kg Compound C),每组12只。NC组仅暴露腹主动脉而不结扎,其他组均构建CHF模型。给药结束后,比较各组大鼠血流动力学参数[左心室收缩压(LVSP)、左心室内压最大上升速率(+dp/dtmax)]和心脏功能指标[左心室舒张末期内径(LVEDD)、左心室收缩末期内径(LVESD)、室间隔厚度(IVS)、左心室功能(LVEF)]。Masson染色检测心肌纤维化情况。Western blot检测大鼠心肌组织Ⅰ型胶原蛋白(CollagenⅠ)、Ⅲ型胶原蛋白(CollagenⅢ)、转化生长因子-β(TGF-β)及通过调控AMPK/沉默信息调节因子1(SIRT1)/过氧化物酶体增殖物激活受体γ辅激活因子1α(PGC-1α)通路相关蛋白表达。实时荧光定量聚合酶链反应(RT-qPCR)检测大鼠心肌组织miR-19a-3p的相对表达量。结果:与NC组比较,Model组大鼠心肌纤维化程度加重,LVSP、+dp/dtmax、LVEF、miR-19a-3p表达水平及p-AMPK/AMPK、SIRT1、PGC-1α蛋白表达降低,LVESD、LVEDD、IVS及CollagenⅠ、CollagenⅢ、TGF-β蛋白表达升高(均P<0.05)。与Model组、NC agomir组比较,miR-19a-3p agomir组大鼠心肌纤维化程度改善,LVSP、+dp/dtmax、LVEF、miR-19a-3p表达水平及p-AMPK/AMPK、SIRT1、PGC-1α蛋白表达升高,LVESD、LVEDD、IVS及CollagenⅠ、CollagenⅢ、TGF-β蛋白表达降低(均P<0.05)。与miR-19a-3p agomir组比较,miR-19a-3p agomir+Compound C组大鼠心肌纤维化程度加重,LVSP、+dp/dtmax、LVEF及p-AMPK/AMPK、SIRT1、PGC-1α蛋白表达降低,LVESD、LVEDD、IVS及CollagenⅠ、CollagenⅢ、TGF-β蛋白表达升高(均P<0.05),而miR-19a-3p表达水平比较差异无统计学意义(P>0.05)。结论:过表达miR-19a-3p可能通过激活AMPK/SIRT1/PGC-1α通路抑制CHF大鼠心肌纤维化。 展开更多
关键词 充血性心力衰竭 大鼠 微小RNA-19a-3p 腺苷酸活化蛋白激酶 沉默信息调节因子1 过氧化物酶体增殖物激活受体γ辅激活因子1α 心肌纤维化
下载PDF
上一页 1 2 17 下一页 到第
使用帮助 返回顶部