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Nicotinamide adenine dinucleotide phosphate oxidase activation and neuronal death after ischemic stroke 被引量:5
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作者 Jiamei Shen Radhika Rastogi +1 位作者 Xiaokun Geng Yuchuan Ding 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第6期948-953,共6页
Nicotinamide adenine dinucleotide phosphate oxidase(NOX) is a multisubunit enzyme complex that utilizes nicotinamide adenine dinucleotide phosphate to produce superoxide anions and other reactive oxygen species. Under... Nicotinamide adenine dinucleotide phosphate oxidase(NOX) is a multisubunit enzyme complex that utilizes nicotinamide adenine dinucleotide phosphate to produce superoxide anions and other reactive oxygen species. Under normal circumstances, reactive oxygen species mediate a number of important cellular functions, including the facilitation of adaptive immunity. In pathogenic circumstances, however,excess reactive oxygen species generated by NOX promotes apoptotic cell death. In ischemic stroke, in particular, it has been shown that both NOX activation and derangements in glucose metabolism result in increased apoptosis. Moreover, recent studies have established that glucose, as a NOX substrate, plays a vital role in the pathogenesis of reperfusion injury. Thus, NOX inhibition has the potential to mitigate the deleterious impact of hyperglycemia on stroke. In this paper, we provide an overview of this research,coupled with a discussion of its implications for the development of NOX inhibition as a strategy for the treatment of ischemic stroke. Both inhibition using apocynin, as well as the prospect of developing more specific inhibitors based on what is now understood of the biology of NOX assembly and activation, will be highlighted in the course of our discussion. 展开更多
关键词 nicotinamide adenine dinucleotide PHOSphate oxidase stroke nicotinamide adenine dinucleotide PHOSphate oxidase inhibitors reactive oxygen species ISCHEMIA/REPERFUSION neuroprotection hyperglycolysis NADPH NOX
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Panax Notoginseng Saponins Inhibits Atherosclerotic Plaque Angiogenesis by Down-Regulating Vascular Endothelial Growth Factor and Nicotinamide Adenine Dinucleotide Phosphate Oxidase Subunit 4 Expression 被引量:13
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作者 乔云 张鹏举 +5 位作者 鹿晓婷 孙巍巍 刘桂林 任敏 闫磊 张继东 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2015年第4期259-265,共7页
Objective: To investigate the mechanism of Panax notoginseng saponins (PNS), an effective component extracted from Panax notoginseng, on atherosclerotic plaque angiogenesis in atherosclerosis-prone apolipoprotein E... Objective: To investigate the mechanism of Panax notoginseng saponins (PNS), an effective component extracted from Panax notoginseng, on atherosclerotic plaque angiogenesis in atherosclerosis-prone apolipoprotein E-knockout (ApoE-KO) mice fed with high-fat, high-cholesterol diet. Methods: Twenty ApoE-KO mice were divided into two groups, the model group and the PNS group. Ten normal C57BL/6J mice were used as a control group. PNS (60 mg/kg) was orally administered daily for 12 weeks in the PNS group, The ratio of plaque area to vessel area was examined by histological staining. The tissue sample of aortic root was used to detect the CD34 and vascular endothelial growth factor (VEGF) expression areas by immunohistochemistry. The expression of VEGF and nicotinamide adenine dinucleotide phosphate oxidase subunit 4 (NOX4) were measured by reverse transcription polymerase chain reaction and Westem blotting respectively. Results: After treatment with PNS, the plaque areas were decreased (P〈0.05). CD34 expressing areas and VEGF expression areas in plaques were significantly decreased (P〈0.05). Meanwhile, VEGF and NOX4 mRNA expression were decreased after treatment with PNS, VEGF and NOX4 protein expression were also decreased by about 72% and 63%, respectively (P〈0.01). Conclusion: PNS, which decreases VEGF and NOX4 expression, could alleviate plaque angiogenesis and attenuate atherosclerosis. 展开更多
关键词 Panax notoginseng saponins ATHEROSCLEROSIS plaque angiogenesis vascular endothelial growth factor nicotinamide adenine dinucleotide phosphate oxidase subunit 4
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Relationship between reduced nicotinamide adenine dinucleotide phosphate oxidase subunit p22phox gene polymorphism and obstructive sleep apnea-hypopnea syndrome in the Chinese Han population 被引量:6
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作者 LIU Hui-guo LIU Kui ZHOU Yan-ning XU Yong-jian 《Chinese Medical Journal》 SCIE CAS CSCD 2009年第12期1369-1374,共6页
Background Increased production of reactive oxygen species (ROS) is thought to play a major role in the pathogenesis of obstructive sleep apnea-hypopnea syndrome (OSAHS). The reduced nicotinamide adenine dinucleot... Background Increased production of reactive oxygen species (ROS) is thought to play a major role in the pathogenesis of obstructive sleep apnea-hypopnea syndrome (OSAHS). The reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase complex is an important source of ROS. The p22phox subunit is polymorphic with a C242T variant that changes histidine-72 for a tyrosine in the potential heme binding site. This study aimed to investigate the relationship between NADPH oxidase subunit p22phox gene polymorphism and OSAHS. Methods The genotypes of p22phox polymorphism were determined by polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLP) assay in 176 unrelated subjects of the Han population in southern region of China (including 107 OSAHS subjects and 69 non-OSAHS subjects), while the plasma concentration of superoxide dismutase (SOD) was detected in the two groups, and p22phox mRNA expression in peripheral blood mononuclear cell (PBMC) was determined with reverse transcription polymerase chain reaction (RT-PCR). Results The phagocyte NADPH oxidase subunit p22phox mRNA expression was significantly increased in the OSAHS group than that in the non-OSAHS group (P 〈0.01). Compared with the non-OSAHS control group ((85.31±9.23) U/ml), the levels of SOD were lower in patients with OSAHS ((59.65±11.61) U/ml (P 〈0.01). There were significant differences in genotypes distribution in p22phox polymorphism between the two groups (P=0.02). Compared with the non-OSAHS control group, the OSAHS group had a significantly higher T allele frequency in p22phox polymorphism (P=0.03). There were independent effects of p22phox polymorphism on body mass index (BMI), neck circumference (NC), waist-to-hip ratio (WHR) in the OSAHS group, and the carriers of the T allele of p22phox polymorphism had greater NC, WHR, systolic blood pressure (SBP), diastolic blood pressure (DBP) and apnea-hypopnea index (AHI) (P 〈0.05), but the carriers of the T allele had lower SOD (P 〈0.01) and lowest SaO2 (P=0.04). There was no significant difference in p22phox mRNA expression between the OSAHS groups with or without T allele (P=0.45). Conclusions The NADPH oxidase subunit p22phox gene polymorphism may be associated with susceptibility to OSAHS, and it may be an important candidate gene for OSAHS. 展开更多
关键词 obstructive sleep apnea syndrome reduced nicotinamide adenine dinucleotide phosphate oxidase p22phox gene POLYMORPHISM
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Drought-Stimulated Activity of Plasma Membrane Nicotinamide Adenine Dinucleotide Phosphate Oxidase and Its Catalytic Properties in Rice 被引量:4
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作者 Zhuang-Qin Duan Lei Bai +4 位作者 Zhi-Guang Zhao Guo-Ping Zhang Fang-Min Cheng Li-Xi Jiang Kun-Ming Chen 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2009年第12期1104-1115,共12页
The activity of plasma membrane (PM) nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and its catalytic properties in rice was investigated under drought stress conditions. Drought stress led to decreas... The activity of plasma membrane (PM) nicotinamide adenine dinucleotide phosphate (NADPH) oxidase and its catalytic properties in rice was investigated under drought stress conditions. Drought stress led to decreased leaf relative water content (RWC) and, as a result of drought-induced oxidative stress, the activities of antioxidant enzymes increased significantly. More interestingly, the intensity of applied water stress was correlated with increased production of H2O2 and O2^- and elevated activity of PM NADPH oxidase, a key enzyme of reactive oxygen species generation in plants. Histochemical analyses also revealed increased H2O2 and O2^- production in drought-stressed leaves. Application of diphenylene iodonium (DPI), an inhibitor of PM NADPH oxidase, did not alleviate drought-induced production of H2O2 and O2^-. Catalysis experiments indicated that the rice PM NADPH oxidase was partially fiavin-dependent. The pH and temperature optima for this enzyme were 9.8 and 40 ℃, respectively. In addition, drought stress enhanced the activity under alkaline pH and high temperature conditions. These results suggest that a complex regulatory mechanism, associated with the NADPH oxidase-H2O2 system, is involved in the response of rice to drought stress. 展开更多
关键词 catalytic properties drought stress plasma membrane nicotinamide adenine dinucleotide phosphate oxidase reactive oxygen species rice Oryza .sativa).
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Excessive Copper Induces the Production of Reactive Oxygen Species,which is Mediated by Phospholipase D, Nicotinamide Adenine Dinucleotide Phosphate Oxidase and Antioxidant Systems 被引量:2
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作者 Zhong-Lian Yu Jin-Guang Zhang Xue-Chen Wang Jia Chen 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2008年第2期157-167,共11页
Tobacco BY-2 suspension cells were used to study the chemical damage and its associated mechanisms caused by Cu^2+. Treatment with 100 μmol/L Cu^2+ generated a large amount of HzOz and thiobarbituric acid-reactive ... Tobacco BY-2 suspension cells were used to study the chemical damage and its associated mechanisms caused by Cu^2+. Treatment with 100 μmol/L Cu^2+ generated a large amount of HzOz and thiobarbituric acid-reactive substances (TBARS) in cells. Using phospholipase D (PLD) specific inhibitor (1-butanol) or phosphatidic acid (PA), we demonstrated that PLD plays an important role in the generation of H2O2 and TBARS. Semi-quantitative reverse-transcriptase polymerase chain reaction and enzyme activity assays with wild type and nicotinamide adenine dinucleotide phosphate (NADPH) oxidaseoverexpressing BY-2 cells revealed that PLD and PA are the key factors leading to NADPH oxidase activation, which is responsible for H2O2 and TBARS production induced by Cu^2+. Moreover, the content of ascorbic acid (AsA), an effective antioxidant, was sharply reduced in BY-2 cells exposed to excessive Cu^2+. Furthermore, a significant downregulation of the enzymes of AsA biosynthesis and the antioxidant system was found. This evidence suggests that excessive Cu^2+-elevated reactive oxygen species (ROS) production is caused by upregulated PLD that elevates the activity of NADPH oxidase and its collapsed antioxidant systems that scavenges ROS. 展开更多
关键词 ascorbic acid Cu^2+ nicotinamide adenine dinucleotide phosphate oxidase phospholipase D reactive oxygen species.
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Association of nicotinamide adenine dinucleotide phosphate oxidase p22phox gene 549C〉T polymorphism with coronary artery disease
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作者 LIU Tong-tao WANG Li-li +1 位作者 FANG Sheng-xia JIA Chong-qi 《Chinese Medical Journal》 SCIE CAS CSCD 2012年第8期1416-1419,共4页
Background The p22phox is a critical component of the superoxide-generating vascular nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. Several polymorphisms in p22phox gene are studied for their associati... Background The p22phox is a critical component of the superoxide-generating vascular nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. Several polymorphisms in p22phox gene are studied for their association with cardiovascular diseases. However, no publication is available to assess the relation of 549C〉T polymorphism in p22pho~ gene to coronary artery disease (CAD) risk. This study was to investigate the effect of the p22phox gene 549C〉T polymorphism on CAD risk. Methods Hospital-based case-control study was conducted with 297 CAD patients and 343 healthy persons as the control group. Polymerase chain reaction and pyrosequencing using PSQ 96 MA Pyrosequencer (Biotage AB) were used to detect the polymorphisms. Multiple Logistic regression model was used to adjust the potential confounders and to estimate odds ratio (OR) with 95% confidence intervals (CIs). Results The observed genotype frequencies of this polymorphism obeyed the Hardy-Weinberg equilibrium in both cases (P=0.439) and controls (P=-0.668). The frequency of mutant genotypes ('I-I-+CT) in cases (41.08%) was higher than that in controls (36.73%) with an OR=1.20 (95% C1=0.87-1.65). After the adjustment of the potential confounders, there was a significant association of the mutant genotypes with increased risk of CAD (OR=1.57, 95% C1=1.01-2.46, P=0.047). Conclusions The mutant genotypes of the p22phox gene 549C〉T polymorphism had a significant effect on the increased risk of CAD in this studied population. 展开更多
关键词 coronary artery disease nicotinamide adenine dinucleotide phosphate oxidase oxidative stress P22PHOX POLYMORPHISM
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Pioglitazone inhibits the expression of nicotinamide adenine dinucleotide phosphate oxidase and p38 mitogen-activated protein kinase in rat mesangial cells
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作者 Wang Shan Ye Shan-dong +1 位作者 Sun Wen-jia Hu Yuan-yuan 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第21期4054-4059,共6页
Background Oxidative Stress and p38 mitogen-activated protein kinase (p38MAPK) play a vital role in renal fibrosis. Pioglitazone can protect kidney but the underlying mechanisms are less clear. The purpose of this s... Background Oxidative Stress and p38 mitogen-activated protein kinase (p38MAPK) play a vital role in renal fibrosis. Pioglitazone can protect kidney but the underlying mechanisms are less clear. The purpose of this study was to investigate the effect of pioglitazone on oxidative stress and whether the severity of oxidative stress was associated with the phosphorylation level of p38MAPK. 展开更多
关键词 nicotinamide adenine dinucleotide phosphate oxidase p38 mitogen-activated protein kinase oxidative stress "pioglitazone mesangial cells
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Potential role of NADPH oxidase in pathogenesis of pancreatitis 被引量:6
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作者 Wei-Li Cao Xiao-Hui Xiang +2 位作者 Kai Chen Wei Xu Shi-Hai Xia 《World Journal of Gastrointestinal Pathophysiology》 CAS 2014年第3期169-177,共9页
Studies have demonstrated that reactive oxygen species(ROS) are closely related to inflammatory disorders. Nicotinamide adenine dinucleotide phosphate oxidase(NOX), originally found in phagocytes, is the main source o... Studies have demonstrated that reactive oxygen species(ROS) are closely related to inflammatory disorders. Nicotinamide adenine dinucleotide phosphate oxidase(NOX), originally found in phagocytes, is the main source of ROS in nonphagocytic cells. Besides directly producing the detrimental highly reactive ROS to act on biomolecules(lipids, proteins, and nucleic acids), NOX can also activate multiple signal transduction pathways, which regulate cell growth, proliferation, differentiation and apoptosis by producing ROS. Recently, research on pancreatic NOX is no longer limited to inflammatory cells, but extends to the aspect of pancreatic acinar cells and pancreatic stellate cells, which are considered to be potentially associated with pancreatitis. In this review, we summarize the literature on NOX protein structure, activation, function and its role in the pathogenesis of pancreatitis. 展开更多
关键词 nicotinamide adenine dinucleotide phosphate oxidase Reactive oxygen species PANCREATITIS PANCREATIC acinar CELLS PANCREATIC stellate CELLS
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Protective action of NADPH oxidase inhibitors and role of NADPH oxidase in pathogenesis of colon inflammation in mice 被引量:4
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作者 Rima Ramonaite Jurgita Skieceviciene +5 位作者 Simonas Juzenas Violeta Salteniene Juozas Kupcinskas Paulius Matusevicius Vilmante Borutaite Limas Kupcinskas 《World Journal of Gastroenterology》 SCIE CAS 2014年第35期12533-12541,共9页
AIM: To investigate the role of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase in colon epithelial cells in the pathogenesis of acute and chronic colon inflammation in a mouse model of dextran sulphate so... AIM: To investigate the role of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase in colon epithelial cells in the pathogenesis of acute and chronic colon inflammation in a mouse model of dextran sulphate sodium (DSS)-induced colitis. 展开更多
关键词 APOCYNIN Diphenyleneiodonium Dextran sulphate sodium-induced colitis Inflammatory bowel disease nicotinamide adenine dinucleotide phosphate oxidase Reactive oxygen species Tumour necrosis factor-α
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血清Nox2、ATG7水平对新生儿窒息心肌损伤的评估价值
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作者 郭佳佳 张文果 +2 位作者 王文秀 张晓丽 马徜徉 《安徽医药》 CAS 2024年第9期1791-1795,共5页
目的探讨自噬相关基因-7(ATG7)、烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(Nox2)在新生儿窒息病儿血清中的表达及早期诊断价值。方法选取2019年1月至2021年12月在郑州大学第三附属医院产科分娩的75例新生儿窒息病儿为研究组,根据是否合并心肌... 目的探讨自噬相关基因-7(ATG7)、烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(Nox2)在新生儿窒息病儿血清中的表达及早期诊断价值。方法选取2019年1月至2021年12月在郑州大学第三附属医院产科分娩的75例新生儿窒息病儿为研究组,根据是否合并心肌损伤将病儿分为窒息心肌损伤组31例,窒息非心肌损伤组44例。同期选择50例健康足月新生儿为对照组。收集一般资料,采用酶联免疫吸附测定(ELISA)测量血清ATG7水平,采用蛋白质印迹法检测Nox2水平,以Nox2/β肌动蛋白的灰度比值为Nox2表达量;采用Pearson法分析ATG7、Nox2表达的相关性及与各指标的相关性;利用受试者操作特征曲线(ROC曲线)评价Nox2、ATG7水平对新生儿窒息心肌损伤的诊断价值。结果与对照组[0.26±0.06、(4.83±0.61)ng/L]比较,新生儿窒息病儿血清Nox2(0.65±0.09)、ATG7[(21.04±3.66)ng/L]表达水平升高,且窒息心肌损伤组[0.85±0.11、(24.23±3.98)ng/L]病儿血清中Nox2、ATG7水平高于窒息非心肌损伤组[0.51±0.08、(18.80±3.43)ng/L](P<0.05);窒息心肌损伤病儿血清中Nox2、ATG7表达呈显著正相关(r=0.57,P<0.05);病儿血清中Nox2和ATG7表达与肌酸激酶同工酶(CK-MB)、缺血修饰白蛋白(IMA)、超敏C-反应蛋白(hs-CRP)、氨基末端脑钠肽前体(NT-ProBNP)、肌钙蛋白I(cTnI)、肌红蛋白表达均呈正相关(P<0.05);ROC曲线结果显示,血清Nox2、ATG7水平预测新生儿窒息合并心肌损伤的曲线下面积(AUC)及其95%CI分别为0.91(0.82,0.96)、0.89(0.80,0.95),对应的灵敏度分别为83.87%、87.10%,特异度分别为84.09%、75.00%,二者联合预测的AUC及其95%CI为0.92(0.84,0.97),灵敏度为90.32%,特异度为81.82%。结论窒息心肌损伤病儿血清中Nox2、ATG7表达均上调,二者联合检测对窒息心肌损伤有一定的诊断价值。 展开更多
关键词 新生儿窒息 心肌损伤 烟酰胺腺嘌呤二核苷酸磷酸氧化酶2 自噬相关基因-7 诊断
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NADPH氧化酶4在心血管损伤中的作用机制
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作者 石丹丹 宁梓淇 +1 位作者 刘美霞 刘剑刚 《心血管病学进展》 CAS 2024年第2期136-140,共5页
心血管结构和功能损伤是许多心血管疾病的重要病理基础,许多研究表明氧化应激在缺血性心脏病、动脉粥样硬化、高血压等诸多病理性心血管损伤中发挥重要作用。NADPH氧化酶(Nox)是调控氧化还原信号的关键酶,而血管内的活性氧主要来源于Nox... 心血管结构和功能损伤是许多心血管疾病的重要病理基础,许多研究表明氧化应激在缺血性心脏病、动脉粥样硬化、高血压等诸多病理性心血管损伤中发挥重要作用。NADPH氧化酶(Nox)是调控氧化还原信号的关键酶,而血管内的活性氧主要来源于Nox4。随着研究的不断深入,发现Nox4在不同阶段或不同刺激下会发挥不同甚至截然相反的作用,如双向调节动脉粥样硬化的进展、双向作用影响血压等。现总结Nox4在不同心血管损伤中的不同影响及作用机制,为后续的研究提供一定的理论基础。 展开更多
关键词 NADPH氧化酶4 活性氧 心血管损伤
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NOX2通过干预ROS介导的PI3K/AKT信号通路对多发性骨髓瘤细胞能量代谢重编程的作用
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作者 卓理想 梁冰 +1 位作者 张梦琼 陈夏 《西部医学》 2024年第10期1427-1435,共9页
目的探讨烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)通过干预活性氧(ROS)介导的磷脂酰肌醇3激酶/蛋白激酶B(PI3K/AKT)信号通路对多发性骨髓瘤(MM)细胞能量代谢重编程的作用。方法收集2019年4月-2022年4月蚌埠医学院第一附属医院收治的50例M... 目的探讨烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)通过干预活性氧(ROS)介导的磷脂酰肌醇3激酶/蛋白激酶B(PI3K/AKT)信号通路对多发性骨髓瘤(MM)细胞能量代谢重编程的作用。方法收集2019年4月-2022年4月蚌埠医学院第一附属医院收治的50例MM患者骨髓血为MM组,同时收集29例健康正常人骨髓血为对照组,qRT-PCR检测骨髓血NOX2、PI3K相对表达、MM细胞系U266、LP-1的NOX2相对表达水平,分析NOX2与PI3K表达水平、NOX2表达水平与临床病理特征的相关性。WB检测U266、LP-1细胞PI3K/AKT信号通路相关分子表达水平,2′,7′-二氯二氢荧光素二乙酯(DCFH-DA)荧光探针检测细胞ROS水平,2-N(7-硝基苯-2-乙二酸,3-4羟氨基)-2-脱氧葡萄糖(2-NBDG)检测细胞葡萄糖摄取能力,生化实验检测细胞乳酸分泌水平,Seahorse检测细胞代谢情况,通过CCK-8、EdU法、划痕、Transwell实验与体内异种移植实验检测细胞增殖、迁移、侵袭及成瘤能力,免疫组化检测移植瘤NOX2、PI3K/AKT信号通路及糖酵解相关分子表达情况。结果NOX2表达水平在MM患者骨髓血、MM细胞系中均升高。相关性分析结果显示,MM患者骨髓血NOX2与PI3K表达水平呈正相关,ISS分期、β2-微球蛋白、Durie-Salmon分期与NOX2表达水平相关(均P<0.05)。与NC组、sh-NC组相比,NOX2组p-PI3K、p-AKT表达水平升高,sh-NOX2组p-PI3K、p-AKT表达水平降低(均P<0.05)。与NC组相比,NOX2组ROS水平、2-NBDG荧光强度、细胞乳酸分泌水平、细胞外酸化率、糖酵解能力、增殖、迁移、侵袭能力升高,移植瘤体积、质量增大,肿瘤乳酸脱氢酶A(LDHA)、3-磷酸肌醇依赖性蛋白激酶1(PDK1)、p-PI3K、p-AKT表达水平升高(均P<0.05)。结论NOX2在MM患者骨髓血与细胞系中高表达,可能通过促进ROS生成激活PI3K/AKT信号通路,促进MM细胞能量代谢重编程与恶性生物学行为,进而推动MM发展。 展开更多
关键词 烟酰胺腺嘌呤二核苷酸磷酸氧化酶2 活性氧 磷脂酰肌醇3激酶 蛋白激酶B 多发性骨髓瘤
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NOX4 promotes tumor progression through the MAPK-MEK1/2-ERK1/2 axis in colorectal cancer
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作者 Yu-Jie Xu Ya-Chang Huo +4 位作者 Qi-Tai Zhao Jin-Yan Liu Yi-Jun Tian Lei-Lei Yang Yi Zhang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第4期1421-1436,共16页
BACKGROUND Metabolic reprogramming plays a key role in cancer progression and clinical outcomes;however,the patterns and primary regulators of metabolic reprogramming in colorectal cancer(CRC)are not well understood.A... BACKGROUND Metabolic reprogramming plays a key role in cancer progression and clinical outcomes;however,the patterns and primary regulators of metabolic reprogramming in colorectal cancer(CRC)are not well understood.AIM To explore the role of nicotinamide adenine dinucleotide phosphate oxidase 4(NOX4)in promoting progression of CRC.METHODS We evaluated the expression and function of dysregulated and survival-related metabolic genes using Gene Ontology and Kyoto Encyclopedia of Genes and Genomes.Consensus clustering was used to cluster CRC based on dysregulated metabolic genes.A prediction model was constructed based on survival-related metabolic genes.Sphere formation,migration,invasion,proliferation,apoptosis and clone formation was used to evaluate the biological function of NOX4 in CRC.mRNA sequencing was utilized to explore the alterations of gene expression NOX4 over-expression tumor cells.In vivo subcutaneous and lung metastasis mouse tumor model was used to explore the effect of NOX4 on tumor growth.RESULTS We comprehensively analyzed 3341 metabolic genes in CRC and identified three clusters based on dysregulated metabolic genes.Among these genes,NOX4 was highly expressed in tumor tissues and correlated with worse survival.In vitro,NOX4 overexpression induced clone formation,migration,invasion,and stemness in CRC cells.Furthermore,RNA-sequencing analysis revealed that NOX4 overexpression activated the mitogen-activated protein kinase-MEK1/2-ERK1/2 signaling pathway.Trametinib,a MEK1/2 inhibitor,abolished the NOX4-mediated tumor progression.In vivo,NOX4 overexpression promoted subcutaneous tumor growth and lung metastasis,whereas trametinib treatment can reversed the metastasis.CONCLUSION Our study comprehensively analyzed metabolic gene expression and highlighted the importance of NOX4 in promoting CRC metastasis,suggesting that trametinib could be a potential therapeutic drugs of CRC clinical therapy targeting NOX4. 展开更多
关键词 Colorectal cancer Metabolic reprogramming METASTASIS nicotinamide adenine dinucleotide phosphate oxidase 4 Mitogen-activated protein kinase signaling
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老年全身麻醉手术患者肺部感染病原菌和NADPH oxidase与TLR4及PA水平
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作者 王岑岑 祁琦 应江明 《中华医院感染学杂志》 CAS CSCD 北大核心 2024年第12期1821-1825,共5页
目的探讨老年全身麻醉手术患者肺部感染血清还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶(NADPH oxi-dase)、Toll样受体4(TLR4)、前白蛋白(PA)水平.方法选取2018年12月-2023年4月临安区第一人民医院收治的79例合并肺部感染的老年全身麻醉手术... 目的探讨老年全身麻醉手术患者肺部感染血清还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶(NADPH oxi-dase)、Toll样受体4(TLR4)、前白蛋白(PA)水平.方法选取2018年12月-2023年4月临安区第一人民医院收治的79例合并肺部感染的老年全身麻醉手术患者作为病例组,89例未合并肺部感染的老年全身麻醉手术患者作为对照组;统计老年全身麻醉手术患者肺部感染的病原菌特征;检测血清NADPH oxidase相关亚基P22、P67、TLR4、PA水平;比较两组及不同肺部感染程度的老年全身麻醉手术患者血清P22、P67、TLR4、PA水平.结果79例合并肺部感染的老年全身麻醉手术患者共培养分离病原菌86株,革兰阳性菌33株占38.37%,革兰阴性菌53株占61.63%;血清P22、P67、TLR4水平病例组比对照组高(P<0.05),且中度组和重度组比轻度组高(P<0.05),重度组比中度组高(P<0.05);血清PA水平病例组比对照组低(P<0.05),且中度组和重度组比轻度组低(P<0.05),重度组比中度组低(P<0.05);Spearman相关性分析结果发现血清P22、P67、TLR4水平与老年全身麻醉手术患者肺部感染程度呈正相关(r=0.760,0.712,0.755,P均<0.05),血清PA水平与老年全身麻醉手术患者肺部感染程度呈负相关(r=-0.773,P<0.05).结论老年全身麻醉手术患者肺部感染以革兰阴性菌感染居多,且肺部感染发生后血清NADPH oxidase相关亚基P22、P67、TLR4水平呈高表达,PA水平呈低表达;NADPH oxidase相关亚基P22、P67、TLR4、PA水平与患者肺部感染程度密切相关. 展开更多
关键词 全身麻醉手术 肺部感染 术后感染 还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶 TOLL样受体4 前白蛋白 病原菌 老年人
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超声弹性成像联合血清Mac-2结合蛋白糖基化异构体、NADPH氧化酶2对慢性乙型肝炎患者肝纤维化的诊断价值
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作者 谭雅玲 汪长青 +1 位作者 吴珍宝 明全 《传染病信息》 2024年第1期16-20,40,共6页
目的探讨超声弹性成像联合血清Mac-2结合蛋白糖基化异构体(Mac-2 binds protein glycosylated isomers,M2BPGi)、还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NADPH oxidase 2,NOX2)对慢性乙型肝炎(chronic hepatitis B,CHB)患者肝纤维化的... 目的探讨超声弹性成像联合血清Mac-2结合蛋白糖基化异构体(Mac-2 binds protein glycosylated isomers,M2BPGi)、还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NADPH oxidase 2,NOX2)对慢性乙型肝炎(chronic hepatitis B,CHB)患者肝纤维化的诊断价值。为肝纤维化的诊断提供参考依据。方法选取宜昌市第三人民医院于2021年1月—2023年3月期间收治的175例CHB患者为研究对象,并根据肝纤维化程度分为非显著性肝纤维化组(n=67)和显著性肝纤维化组(n=108)。多因素Logistic回归分析法分析发生显著性肝纤维化的影响因素;超声弹性成像联合血清M2BPGi、NOX2水平对显著性肝纤维化的诊断价值采用受试者工作特征(receiver operating characteristic,ROC)曲线分析。结果非显著性肝纤维化组和显著性肝纤维化组丙氨酸氨基转移酶(alanine transaminase,ALT)、天冬氨酸氨基转移酶(aspartate aminotransferase,AST)、白蛋白(albumin,ALB)和血小板计数(platelet count,PLT)比较差异均具有统计学意义(P均<0.05);与非显著性肝纤维化组比较,显著性肝纤维化组患者应变均值(mean strain value,MEAN)和峰度明显较低(P<0.05),偏度、复杂度(complexity,COMP)、对比度、标准差、蓝色区域面积比(ratio of blue area,AREA)和血清M2BPGi和NOX2水平均明显较高(P<0.05)。血清M2BPGi、NOX2、ALT、COMP、AREA是影响CHB患者发生显著性肝纤维化的独立危险因素,而PLT和MEAN是其保护因素(P<0.05)。ROC分析结果显示,M2BPGi、NOX2、MEAN、COMP和AREA联合诊断显著性肝纤维化的AUC为0.933,显著大于各指标单独诊断的AUC(P<0.05)。结论M2BPGi和NOX2在发生显著性肝纤维化的CHB患者血清中的水平较高,2者联合超声弹性成像对显著性肝纤维化具有较高的诊断价值。 展开更多
关键词 超声弹性成像 Mac-2结合蛋白糖基化异构体 还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶 慢性乙型肝炎 肝纤维化 诊断价值
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NADPH氧化酶导致糖尿病肾病病理改变机制的研究进展
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作者 李悦 《医药前沿》 2024年第17期24-26,共3页
烟酰胺腺嘌呤二核苷酸磷酸(NADPH)氧化酶是引发糖尿病肾病病理改变的重要因素,通过氧化应激反应作用于肾脏。对NADPH氧化酶的研究成为近年热点。本文对NADPH氧化酶导致糖尿病肾病病理改变机制进行综述。
关键词 综述 NADPH氧化酶 氧化应激 糖尿病肾病
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胸腔镜肺楔形切除术对小于1.5 cm肺混合性磨玻璃结节患者疗效及血清NOX2水平的影响 被引量:1
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作者 林泽邦 徐彪 +3 位作者 张珂 汪裕琪 周亚运 曹炜 《中国现代医学杂志》 CAS 北大核心 2023年第18期67-71,共5页
目的探究胸腔镜肺楔形切除术对小于1.5 cm肺混合性磨玻璃结节(GGN)患者疗效及血清还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)水平的影响。方法选取2018年11月—2022年11月安徽医科大学第二附属医院收治的96例肺混合性GGN患者,利用随... 目的探究胸腔镜肺楔形切除术对小于1.5 cm肺混合性磨玻璃结节(GGN)患者疗效及血清还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)水平的影响。方法选取2018年11月—2022年11月安徽医科大学第二附属医院收治的96例肺混合性GGN患者,利用随机数字表法分为对照组(48例,采用胸腔镜下肺叶切除术进行治疗)与研究组(48例,采用胸腔镜肺楔形切除术进行治疗)。比较两组肺患者的临床疗效、手术指标、肺功能、血清NOX2水平的变化及术后发生并发症的情况。结果研究组总有效率高于对照组(P<0.05)。研究组术中出血量低于对照组(P<0.05),手术时间、胸管留置时间、住院时间短于对照组(P<0.05)。研究组治疗前后最大肺活量、每分钟最大通气量、残气量的差值高于对照组(P<0.05)。研究组手术前后血清NOX2的差值低于对照组(P<0.05)。两组患者术后并发症总发生率比较,差异无统计学意义(P>0.05)。结论胸腔镜肺楔形切除术治疗肺混合性GGN的疗效确切,可改善患者的手术指标及肺功能,降低患者血清NOX2水平,安全性高,值得推广。 展开更多
关键词 肺楔形切除术 肺混合性磨玻璃结节 胸腔镜 肺叶切除术 还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2
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沉默Salusin-β对糖尿病大鼠内皮功能障碍的影响及机制研究
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作者 左宪宏 张婷婷 +1 位作者 李月琴 赵佳琪 《天津医药》 CAS 北大核心 2023年第5期491-497,共7页
目的分析短发夹RNA(shRNA)沉默心血管调节肽(Salusin-β)对糖尿病(DM)大鼠内皮功能障碍的影响及其潜在的机制。方法52只SD大鼠随机抽取12只为正常对照组(NC组),其余大鼠采用喂食高糖高脂饲料和腹腔注射链脲佐菌素的方法制备DM模型。将3... 目的分析短发夹RNA(shRNA)沉默心血管调节肽(Salusin-β)对糖尿病(DM)大鼠内皮功能障碍的影响及其潜在的机制。方法52只SD大鼠随机抽取12只为正常对照组(NC组),其余大鼠采用喂食高糖高脂饲料和腹腔注射链脲佐菌素的方法制备DM模型。将36只建模成功的大鼠分为DM组、Ad-Scr shRNA组和Ad-Salusin-βshRNA组,每组12只。Ad-Scr shRNA组大鼠尾静脉注射腺病毒空载体(Ad-scramble shRNA),Ad-Salusin-βshRNA组大鼠尾静脉注射编码Salusin-βshRNA的腺病毒载体(Ad-Salusin-βshRNA)。每2周注射1次,NC组和DM组注射等量生理盐水。4周后,检测大鼠空腹血糖(FBG)和血清Salusin-β水平以及胸主动脉血管舒张功能;酶联免疫吸附试验检测大鼠胸主动脉肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-6、IL-1β、丙二醛(MDA)、超氧化物歧化酶(SOD)水平;二氢乙锭(DHE)染色检测胸主动脉中活性氧(ROS)水平;苏木精-伊红染色观察大鼠胸主动脉组织病理学变化;荧光定量PCR检测大鼠胸主动脉Salusin-β和还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)mRNA表达水平;Western blot法检测大鼠胸主动脉NOX2、核因子κB p65(NF-κB p65)蛋白表达。结果与NC组相比,DM组大鼠FBG、血清Salusin-β水平升高,胸主动脉TNF-α、IL-6、IL-1β、MDA、ROS水平升高,胸主动脉内膜-中膜厚度增厚,Salusin-βmRNA、NOX2 mRNA和蛋白、细胞核NF-κB p65蛋白水平升高,Ach诱发的内皮依赖性血管舒张功能下降,胸主动脉SOD和细胞质NF-κB p65蛋白表达水平降低(P<0.05)。与DM组和Ad-Scr shRNA组相比,Ad-Salusin-βshRNA组大鼠FBG和血清Salusin-β表达下降,胸主动脉TNF-α、IL-6、IL-1β、MDA、ROS表达下降,胸主动脉内膜-中膜厚度变薄,Salusin-βmRNA、NOX2 mRNA和蛋白、细胞核NF-κB p65蛋白表达水平降低,Ach诱发的内皮依赖性血管舒张功能升高,胸主动脉SOD和细胞质NF-κB p65蛋白表达水平升高(P<0.05)。结论shRNA沉默Salusin-β可减轻DM大鼠内皮功能障碍,其作用机制可能与抑制NOX2/ROS/NF-κB信号通路活化有关。 展开更多
关键词 糖尿病 2型 疾病模型 动物 心血管调节肽 内皮功能障碍 还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2 活性氧 核因子ΚB
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子痫前期孕妇外周血NOX2和胎盘组织中NOX2、ROS的表达及其临床意义 被引量:2
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作者 卢彩红 朱锦明 +2 位作者 李蕾 任艺 蔡燕丽 《中国现代医学杂志》 CAS 北大核心 2023年第12期79-85,共7页
目的探讨子痫前期孕妇外周血、胎盘组织中还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)及胎盘组织中活性氧(ROS)的表达及其临床意义。方法选取2021年3月—2022年10月在徐州医科大学附属徐州妇幼保健院就诊的子痫前期孕妇60例,其中早发... 目的探讨子痫前期孕妇外周血、胎盘组织中还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2(NOX2)及胎盘组织中活性氧(ROS)的表达及其临床意义。方法选取2021年3月—2022年10月在徐州医科大学附属徐州妇幼保健院就诊的子痫前期孕妇60例,其中早发型子痫前期孕妇30例(早发组),晚发型子痫前期孕妇30例(晚发组),另取同期在该院就诊的健康孕妇30例作为对照(正常组)。检测各组外周血NOX2、胎盘组织中NOX2 mRNA相对表达量和ROS表达。结果早发组外周血NOX2、胎盘组织NOX2阳性表达率、NOX2mRNA相对表达量、ROS阳性表达率均高于对照组和晚发组(P<0.0125);晚发组与对照组外周血NOX2、胎盘组织NOX2阳性表达率、NOX2 mRNA相对表达量、ROS阳性表达率比较,差异均无统计学意义(P>0.05)。早发组≥30岁孕妇外周血NOX2高于<30岁孕妇(P<0.05)。早发组不同体质量指数、孕妇类型、严重程度孕妇外周血NOX2、胎盘组织NOX2阳性表达率、NOX2 mRNA相对表达量、ROS阳性表达率比较,差异均无统计学意义(P>0.05)。晚发组不同年龄、体质量指数、孕妇类型、严重程度孕妇外周血NOX2、胎盘组织NOX2阳性表达率、NOX2 mRNA相对表达量、ROS阳性表达率比较,差异均无统计学意义(P>0.05)。子痫前期外周血NOX2与胎盘组织NOX2蛋白、NOX2 mRNA相对表达量呈正相关(r=0.411和0.455,P=0.017和0.012);胎盘组织NOX2蛋白与胎盘组织NOX2 mRNA相对表达量呈正相关(r=0.425,P=0.013)。早发组胎盘组织NOX2和ROS阳性表达率高于晚发组和对照组(P<0.05)。结论外周血NOX2和胎盘组织中NOX2、ROS表达水平升高可能与早发型子痫前期的发病有关。子痫前期早发型与晚发型的发病机制可能有所不同。 展开更多
关键词 子痫前期 还原型烟酰胺腺嘌呤二核苷酸磷酸氧化酶2 活性氧 外周血 胎盘组织 早发型 晚发型
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miR-92a-3p在小鼠胚胎神经管闭合中的作用及机制
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作者 张燕秋 付佳琳 +2 位作者 黄琬淇 袁正伟 顾卉 《发育医学电子杂志》 2023年第4期241-248,F0002,共9页
目的探讨miR-92a-3p与烟酰胺腺嘌呤二核苷酸磷酸氧化酶4(nicotinamide adenine dinucleotide phosphate oxidase 4,NOX4)之间的相互作用,以及两者在神经管畸形(neural tube defect,NTD)中对细胞迁移的影响。方法实验动物采用C57BL/6J小... 目的探讨miR-92a-3p与烟酰胺腺嘌呤二核苷酸磷酸氧化酶4(nicotinamide adenine dinucleotide phosphate oxidase 4,NOX4)之间的相互作用,以及两者在神经管畸形(neural tube defect,NTD)中对细胞迁移的影响。方法实验动物采用C57BL/6J小鼠,孕鼠随机分为NTD组与对照组,每组30只,NTD组采用全反式维A酸(all-trans retinoic acid,ATRA)诱导NTD模型,于E9.5采集胚胎样本。实验所用细胞系为小鼠神经干细胞C17.2,转染NOX4过表达质粒、miR-92a-3p模拟物/抑制剂、模拟物对照/抑制剂对照。采用实时定量PCR(real-time quantitative PCR,RT-qPCR)检测胚胎和C17.2细胞中miR-92a-3p表达,采用蛋白质印迹法检测NOX4的表达。通过双荧光素酶报告基因实验明确miR-92a-3p对NOX4的结合及靶向调控关系。采用细胞划痕实验与Transwell实验观察miR-92a-3p和NOX4对细胞迁移活动的影响。统计学方法采用单因素方差分析、独立样本t检验。结果NTD组胚胎miR-92a-3p表达低于对照组(0.753±0.052与1.006±0.126,t=3.212,P=0.033),NOX4蛋白表达高于对照组(0.870±0.039与0.688±0.056,t=4.621,P=0.010)。在转染NOX43’端非翻译区(3’untranslated regions,3’UTR)荧光素酶报告基因的C17.2细胞中,共转染miR-92a-3p模拟物组的荧光素酶活性低于模拟物对照组(0.368±0.102与1.000±0.149,t=5.530,P=0.005);共转染miR-92a-3p抑制剂组的荧光素酶活性高于抑制剂对照组(1.254±0.080与1.000±0.129,t=2.899,P=0.044)。C17.2细胞转染miR-92a-3p模拟物组,NOX4的蛋白表达低于模拟物对照组(1.077±0.142与1.432±0.300,t=2.396,P=0.044);转染miR-92a-3p抑制剂组,NOX4的蛋白表达高于抑制剂对照组(1.443±0.054与1.249±0.090,t=3.709,P=0.010)。细胞划痕的实验结果表明,转染NOX4质粒后,细胞伤口愈合的速度低于对照组[(8.8±6.5)%与(44.1±6.8)%,t=6.513,P=0.003],然而当过表达NOX4的同时转染miR-92a-3p,与转染NOX4组比较,细胞伤口愈合速度加快[(37.2±11.7)%与(8.8±6.5)%,t=3.680,P=0.021]。Transwell实验发现,转染NOX4质粒后,迁移的细胞数量低于对照组[(102.7±4.5)与(133.0±11.8)个,t=4.162,P=0.014],而共转染NOX4与miR-92a-3p后,与转染NOX4组比较,发生迁移的细胞明显增多[(176.0±11.0)与(102.7±4.5)个,t=10.680,P<0.001]。结论小鼠NTD模型中,异常低表达的miR-92a-3p能够通过上调NOX4的表达,阻碍小鼠胚胎神经管闭合过程中细胞的迁移活动,最终导致NTD的发生。 展开更多
关键词 神经管畸形 细胞迁移 miR-92a-3p 烟酰胺腺嘌呤二核苷酸磷酸氧化酶4
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