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MicroRNA-155 mediates endogenous angiotensin II type 1 receptor regulation:implications for innovative type 2 diabetes mellitus management
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作者 Konstantinos I Papadopoulos Alexandra Papadopoulou Tar-Choon Aw 《World Journal of Diabetes》 SCIE 2023年第9期1334-1340,共7页
Type 2 diabetes mellitus(T2DM)is a lifelong condition and a threat to human health.Thorough understanding of its pathogenesis is acutely needed in order to devise innovative,preventative,and potentially curative pharm... Type 2 diabetes mellitus(T2DM)is a lifelong condition and a threat to human health.Thorough understanding of its pathogenesis is acutely needed in order to devise innovative,preventative,and potentially curative pharmacological interventions.MicroRNAs(miRNA),are small,non-coding,one-stranded RNA molecules,that can target and silence around 60%of all human genes through translational repression.MiR-155 is an ancient,evolutionarily well-conserved miRNA,with distinct expression profiles and multifunctionality,and a target repertoire of over 241 genes involved in numerous physiological and pathological processes including hematopoietic lineage differentiation,immunity,inflammation,viral infections,cancer,cardiovascular conditions,and particularly diabetes mellitus.MiR-155 Levels are progressively reduced in aging,obesity,sarcopenia,and T2DM.Thus,the loss of coordinated repression of multiple miR-155 targets acting as negative regulators,such as C/EBPβ,HDAC4,and SOCS1 impacts insulin signaling,deteriorating glucose homeostasis,and causing insulin resistance(IR).Moreover,deranged regulation of the renin angiotensin aldosterone system(RAAS)through loss of Angiotensin II Type 1 receptor downregulation,and negated repression of ETS-1,results in unopposed detrimental Angiotensin II effects,further promoting IR.Finally,loss of BACH1 and SOCS1 repression abolishes cytoprotective,anti-oxidant,anti-apoptotic,and anti-inflam matory cellular pathways,and promotesβ-cell loss.In contrast to RAAS inhibitor treatments that further decrease already reduced miR-155 Levels,strategies to increase an ailing miR-155 production in T2DM,e.g.,the use of metformin,mineralocorticoid receptor blockers(spironolactone,eplerenone,finerenone),and verapamil,alone or in various combinations,represent current treatment options.In the future,direct tissue delivery of miRNA analogs is likely. 展开更多
关键词 angiotensin II angiotensin II type 1 receptor Arginase 2 L-type calcium channel Mineralocorticoid receptor MiRNA-155 Renin-angiotensin aldosterone system type 1/2 diabetes mellitus VERAPAMIL
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Association of Polymorphisms in Angiotensin-converting Enzyme and Type 1 Angiotensin Ⅱ Receptor Genes with Coronary Heart Disease and the Severity of Coronary Artery Stenosis 被引量:5
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作者 邱春光 韩战营 +1 位作者 卢文杰 张存泰 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2007年第6期660-663,共4页
To explore the relation of angiotensin-converting enzyme (ACE) and angiotensin Ⅱ type 1 receptor (AT1R) gene polymorphism with coronary heart disease (CHD) and the severity of coronary artery stenosis, 130 CHD ... To explore the relation of angiotensin-converting enzyme (ACE) and angiotensin Ⅱ type 1 receptor (AT1R) gene polymorphism with coronary heart disease (CHD) and the severity of coronary artery stenosis, 130 CHD patients who underwent coronary angiography were examined for the number of affected coronary vessels (≥75% stenosis) and coronary Jeopardy score. The insertion/deletion of ACE gene polymorphism and AT1R gene polymorphism (an A→C transversion at nucleotide position 1166) were detected by using polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) in CHD patients and 90 healthy serving as controls. The resuits showed that DD genotype and of ACE were more frequent in CHD patients than that in control group (38.5% vs 14.4%, P〈0.001). The frequency of the ATIR A/C genotypes did not differ between the patients and the controls (10% vs 13.1%, P〉0.05). The relative risk associated with the ACE-DD was increased by AT1R-AC genotype. Neither the number of affected coronary vessels nor the coronary score differed among the ACE I/D genotypes (P〉0.05). But the number of affected coronary vessels and the coronary score were significantly greater in the patients with the AT1R-AC genotype than in those with the AA genotype (P〈0.05). In conclusion, DD genotype may be risk factor for CHD and MI in Chinese people, and is not responsible for the development of the coronary artery stenosis. The AT1R-C allele may increase the relative risk associated with the ACE-DD genotype, and may be involved in the development of the stenosis of coronary artery. 展开更多
关键词 angiotensin -converting enzyme angiotensin receptor gene polymorphism coronary angiography
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Effect of angiotensin Ⅱ type 1 receptor blocker and angiotensin converting enzyme inhibitor on the intraocular growth factors and their receptors in streptozotocin-induced diabetic rats 被引量:5
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作者 Ik Soo Byon Dong Hyun Lee +3 位作者 Eun Sook Jun Min Kyu Shin Sung Who Park Ji Eun Lee 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2017年第6期896-901,共6页
AIM: To investigate the effect of angiotensin II type 1 receptor blocker (ARB) and angiotensin converting enzyme inhibitor (ACEI) on intraocular growth factors and their receptors in streptozotocin-induced diabet... AIM: To investigate the effect of angiotensin II type 1 receptor blocker (ARB) and angiotensin converting enzyme inhibitor (ACEI) on intraocular growth factors and their receptors in streptozotocin-induced diabetic rats. METHODS: Forty Sprague-Dawley rats were divided into 4 groups: control, diabetes mellitus (DM), candesartan- treated DM, and enalapril-treated DM (each group, n---10). After the induction of DM by streptozotocin, candesartan [ARB, 5 mg/(kg · d)] and enalapril [ACEI, 10 mg/(kg · d)] were administered to rats orally for 4Wko Vascular endothelial growth factor (VEGF) and angiotensin II (Ang II) concentrations in the vitreous were measured using enzyme-linked immunosorbent assays, and VEGF receptor 2 and angiotensin II type 1 receptor (ATIR) levels were assessed at week 4 by Western blotting. RESULTS: Vitreous Ang II levels were significantly higher in the DM group and candesartan-treated DM group than in the control (P=0.04 and 0.005, respectively). Vitreous ATIR increased significantly in DM compared to the other three groups (P〈0.007). Candesartan-treated DM rats showed higher vitreal ATIR concentration than the enalapril-treated DM group and control (P〈0.001 and P=0.005, respectively). No difference in vitreous Ang II and ATIR concentration was found between the enalapril- treated DM group and control. VEGF and its receptor were below the minimum detection limit in all 4 groups. CONCLUSION: Increased Ang II and ATIR in the hyperglycemic state indicate activated the intraocular renin-angiotensin system, which is inhibited more effectively by systemic ACEI than systemic ARB. 展开更多
关键词 angiotensin converting enzyme inhibitor angiotensin II type 1 receptor blocker diabetic rat intraocularrenin-angiotensin system
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Effect of nuclear factor-κB and angiotensin Ⅱ receptor type 1 on the pathogenesis of rat non-alcoholic fatty liver disease 被引量:3
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作者 Dao-Yu Tan Hai-Yan Shi +2 位作者 Chang-Ping Li Xiao-Ling Zhong Ming Kang 《World Journal of Gastroenterology》 SCIE CAS 2015年第19期5877-5883,共7页
AIM: To investigate the roles of nuclear factor(NF)-κB and angiotensin Ⅱ receptor type 1(AT1R) in the pathogenesis of non-alcoholic fatty liver disease(NAFLD).METHODS: Forty-two healthy adult male SpragueDawley rats... AIM: To investigate the roles of nuclear factor(NF)-κB and angiotensin Ⅱ receptor type 1(AT1R) in the pathogenesis of non-alcoholic fatty liver disease(NAFLD).METHODS: Forty-two healthy adult male SpragueDawley rats were randomly divided into three groups:the control group(normal diet), the model group,and the intervention group(10 wk of a high-fat diet feeding, followed by an intraperitoneal injection of PDTC); 6 rats in each group were sacrificed at 6, 10,and 14 wk. After sacrifice, liver tissue was taken,paraffin sections of liver tissue specimens were prepared, hematoxylin and eosin(HE) staining was performed, and pathological changes in liver tissue(i.e., liver fibrosis) were observed by light microscopy.NF-κB expression in liver tissue was detected by immunohistochemistry, and the expression of AT1 R in the liver tissue was detected by reverse transcriptionpolymerase chain reaction(RT-PCR). The data are expressed as mean ± SD. A two-sample t test was used to compare the control group and the model group at different time points, paired t tests were used to compare the differences between the intervention group and the model group, and analysis of variance was used to compare the model group with the control group. Homogeneity of variance was analyzed with single factor analysis of variance. H variance analysis was used to compare the variance. P < 0.05 wasconsidered statistically significant.RESULTS: The NAFLD model was successful after 6wk and 10 wk. Liver fibrosis was found in four rats in the model group, but in only one rat in the intervention group at 14 wk. Liver steatosis, inflammation, and fibrosis were gradually increased throughout the model. In the intervention group, the body mass,rat liver index, serum lipid, and transaminase levels were not increased compared to the model group.In the model group, the degree of liver steatosis was increased at 6, 10, and 14 wk, and was significantly higher than in the control group(P < 0.01). In the model group, different degrees of liver cell necrosis were visible and small leaves, punctated inflammation,focal necrosis, and obvious ballooning degeneration were observed. Partial necrosis and confluent necrosis were observed. In the model group, liver inflammatory activity scores at 6, 10, and 14 wk were higher than in the control group(P < 0.01). Active inflammation in liver tissue in the intervention group was lower than in the model group(P < 0.05). HE staining showed liver fibrosis only at 14 wk in 4/6 rats in the model group and in 1/6 rats in the intervention group. NF-κB positive cells were stained yellow or ensemble yellow,and NF-κB was localized in the cytoplasm and/or nucleus. The model group showed NF-κB activation at6, 10, and 14 wk in liver cells; at the same time points,there were statistically significant differences in the control group(P < 0.01). Over time, NF-κB expression increased; this was statistically lower(P < 0.05) at14 weeks in the intervention group compared to the model group, but significantly increased(P < 0.05)compared with the control group; RT-PCR showed that AT1 R mRNA expression increased gradually in the model group; at 14 wk, the expression was significantly different compared with expression at 10 weeks as well as at 6 weeks(P < 0.05). In the model group, AT1 R mRNA expression was significantly higher than at the same time point in the control group(P <0.01).CONCLUSION: With increasing severity of NAFLD,NF-κB activity is enhanced, and the inhibition of NF-κB activity may reduce AT1 R mRNA expression in NAFLD. 展开更多
关键词 Non-alcoholic FATTY liver disease Nuclearfactor-κB angiotensin receptor type 1 Rats Liverfibrosis
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Origin and genomic characteristics of SARS-CoV-2 and its interaction with angiotensin converting enzyme type 2 receptors, focusing on the gastrointestinal tract 被引量:3
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作者 Michail Galanopoulos Aris Doukatas Maria Gazouli 《World Journal of Gastroenterology》 SCIE CAS 2020年第41期6335-6345,共11页
The emergence of coronavirus disease-2019 induced by a newly identified bcoronavirus, namely severe acute respiratory syndrome coronavirus 2(SARSCoV-2) has constituted a public health emergency. Even though it was con... The emergence of coronavirus disease-2019 induced by a newly identified bcoronavirus, namely severe acute respiratory syndrome coronavirus 2(SARSCoV-2) has constituted a public health emergency. Even though it was considered a zoonotic disease, the virus has also spread among humans via respiratory secretions. The expression and distribution of angiotensin converting enzyme type 2(ACE2) in various human organs might also show other possible infection routes. High ACE2 ribonucleic acid expression has been identified in the gastrointestinal tract(GI) indicating its importance as a possible infection pathway of SARS-CoV-2. ACE2 induces viral entry into the host and most importantly has been found to be associated with the function of the gut. Its deficiency has been implicated in several pathologies such as colorectal inflammation. The renin-angiotensin system(RAS) is an essential regulatory cascade operating both at a local tissue level and at the systemic or circulatory level. The RAS may be important in the pathogenesis of chronic liver disease and is associated with the up-regulation of ACE2. Thus, the aim of this review is firstly, the analysis of some important general and genome characteristics of SARS-CoV-2 and secondly, and most importantly, to focus on the utility of ACE2 receptors in both SARS-CoV-2 replication and pathogenesis, especially in the GI tract. 展开更多
关键词 SARS-CoV-2 COVID-19 Gastrointestinal tract angiotensin converting enzyme type 2 angiotensin converting enzyme type 2 receptor Renin-angiotensin system angiotensin converting enzyme
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TypeⅠinositol 1, 4, 5-triphosphate receptors increase in kidney of mice with fulminant hepatic failure 被引量:7
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作者 Ying Wen Wei Cui Pei Liu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第16期2344-2348,共5页
AIM: To delineate the mechanisms of renal vasoconstriction in hepatorenal syndrome (HRS), we investigated the expression of type I inositol 1, 4, 5-triphosphate receptors (IP3R I) of kidney in mice with fulminant... AIM: To delineate the mechanisms of renal vasoconstriction in hepatorenal syndrome (HRS), we investigated the expression of type I inositol 1, 4, 5-triphosphate receptors (IP3R I) of kidney in mice with fulminant hepatic failure (FHF). METHODS: FHF was induced by lipopolysaccharide (LPS) in D-galactosamine (GAIN) sensitized BALB/c mice. There were 20 mice in normal saline (NS)-treated group, 20 mice in LPS-treated group, 20 mice in GaIN- treated group, and 60 mice in GalN/LPS-treated group (FHF group). Liver and kidney tissues were obtained at 2, 6, and 9 h after administration. The liver and kidney specimens were stained with hematoxylin-eosin for studying morphological changes under light microscope. The expression of IP3R I in kidney tissue was tested by immunohistochemistry, Western blot and reverse transcription (RT)-PCR. RESULTS: Kidney tissues were morphologically normal at all time points in all groups. IP3R I proteins were found localized in the plasma region of glomerular mesangial cells (GMC) and vascular smooth muscle cells (VSMC) in kidney by immunohistochemical staining. In kidney of mice with FHF at 6 h and 9 h IP3R I staining was upregulated. Results from Western blot demonstrated consistent and significant increment of IP3R I expression in mice with FHF at 6 h and 9 h (t = 3.16, P 〈 0.05; t = 5.43, P 〈 0.01). Furthermore, we evaluated IP3R I mRNA expression by RT-PCR and observed marked upregulation of IP3R I mRNA in FHF samples at 2 h, 6 h and 9 h compared to controls (t = 2.97, P 〈 0.05; t = 4.42, P 〈 0.01; t = 3.81, P 〈 0.01). CONCLUSION: The expression of IP3R I protein increased in GMC and renal VSMC of mice with FHF, possibly caused by up-regulation of IP3R I mRNA. 展开更多
关键词 Hepatorenal syndrome Fulminant hepatic failure type inositol 1 4 5-trisphophate receptors Glomerular mesangial cells Vascular smooth muscle cells
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Multiple templates-based homology modeling and docking analysis of angiotensin Ⅱ type 1 receptor
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作者 谢云丰 蒋玉仁 +2 位作者 潘亚飞 陈丹 李传俊 《Journal of Central South University》 SCIE EI CAS 2012年第11期3033-3039,共7页
Using the latest reported homologous Chemokine receptors (PDB ID: 3ODU, 3OE0 and 3OE6) as templates, twenty models of angiotensin II (Ang II) type 1 (AT1) receptor (known as p30556) were generated by multiple... Using the latest reported homologous Chemokine receptors (PDB ID: 3ODU, 3OE0 and 3OE6) as templates, twenty models of angiotensin II (Ang II) type 1 (AT1) receptor (known as p30556) were generated by multiple templates homology modeling. According to the results of the initial validation of these twenty models, the model 0020 was finally chosen as the best one for further studies. Then, a 2 ns molecular dynamic (MD) simulation for model 0020 was conducted in normal saline (0.9%, w/F) under periodical boundary conditions, which was followed by docking studies of model 0020 with several existing AT1 receptor blockers (ARBs). The docking results reveal that model 0020 possesses good affinities with these docked ARBs which are in accordance with both the IC50 inhibitor values and their curative effects. The results also show more potent interactions between the model 0020 and its ARBs than those of ever reported results, such as hydrogen bonds, hydrophobic interactions, and especially cation-n interactions and π-π interactions which have never been reported before. This may reveal that the structure of the model 0020 is quite close to its real crystal structure and the model 0020 may have the potential to be used for structure based drug design: 展开更多
关键词 angiotensin II type 1 receptor DOCKING homology modeling molecular dynamics
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Involvement of Angiotensin II Type 1 Receptor and Calcium Channel in Vascular Remodeling and Endothelial Dysfunction in Rats with Pressure Overload
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作者 Dong-rui CHEN Hui JIANG- +3 位作者 Jing CHEN Cheng-chao RUAN Wei-qing HAN Ping-jin GAO 《Current Medical Science》 SCIE CAS 2020年第2期320-326,共7页
Vascular remodeling is an adaptive response to various stimuli,including mechanical forces,inflammatory cy tokines and hormones.In the present study,we investigated the role of angiotensinII type 1 receptor(ATIR)and c... Vascular remodeling is an adaptive response to various stimuli,including mechanical forces,inflammatory cy tokines and hormones.In the present study,we investigated the role of angiotensinII type 1 receptor(ATIR)and calcium channel in carotid artery remodeling in response to increased biomechanical forces by using the transverse aortic constriction(TAC)rat model.TAC was induced on ten week-old male Sprague Dawley rats and these models were treated with ATIR blocker olmesartan(1 mg/kg/day)or/and calcium channel blocker(CCB)amlodipine(0.5 mgkgday)for 14 days.After the treatment,the right common carotid artery proximal to the band(RCCA-B)was collected for further assay.Results showed that olmesartan,but not amlodipine,significantly prevented TAC-induced adventitial hyperplasia.Similarly,olmesartan,but not amlodipine,significantly prevented vascular inflammation,as indicated by increased tumor necrosis factor a(TNF-a)and increased p65 phosphorylation,an indicator of nuclear factor K-light-chain-enhancer of activated B cells(NFkB)activation in RCCA-B.In contrast,both olmesartan and amlodipine reversed the decreased expression of endothelial nitric oxidase synthase(eNOS)and improved endothelium-dependent vasodilation,whereas combination of olmesartan and amlodipine showed no further synergistic protective effects.These results suggest that AT1R was involved in vascular remodeling and inflammation in response to pressure overload,whereas ATIR and subsequent calcium channel were involved in endothelial dysfunction. 展开更多
关键词 transverse aortic constriction angiotensin II type I receptor calcium channel vascular remodcling endothelial dysfunction
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POLYMORPHISM OF ANGIOTENSIN I TYPE 1 RECEPTOR GENE IN ELDERLY PATIENTS WITH ESSENTIAL HYPERTENSION
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作者 方宁远 张怡 +3 位作者 陆惠华 郑迪辉 郑道声 邬亦贤 《Journal of Shanghai Second Medical University(Foreign Language Edition)》 2003年第1期46-49,共4页
Objective To detect the A/C1165 polymorphism of angiotensin Ⅱ type Ⅰ receptor (AT1-R)gene in essential hypertensive elderly. Methods The A/C1166 polymorphism of AT1-R gene was assessed by polymerase chain reaction-r... Objective To detect the A/C1165 polymorphism of angiotensin Ⅱ type Ⅰ receptor (AT1-R)gene in essential hypertensive elderly. Methods The A/C1166 polymorphism of AT1-R gene was assessed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in a case-control study of 87 essential hypertensive elders (EH) and 55 normolensive elders (NT). Results The genotype frequencies of AA, AC, CC were 0 .805 , 0.161, 0 .034 in EH group and 0 .927 ,0 .073 ,0 .000 in NT group respectively. The frequency of C61166 allele was higher in EH group (0.115) than in NT group (0 .036 )(P<0 .05 ). Conclusion The resultsindicate that A/C1166 polymorphism of AT1-R gene may be associated with essential hypertension in elderly. 展开更多
关键词 essential hypertension angiotensin t\pe receptor gene polymorphism
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The role of angiotensinⅡtype 1 receptor pathway in cerebral ischemia-reperfusion injury:Implications for the neuroprotective effectof ARBs
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作者 Shuhan Huang Meng Zhang 《Neuroprotection》 2024年第2期100-119,共20页
Cerebral ischemia-reperfusion(I/R)injury is a crucial factor that impacts the prognosis of recanalization therapy for acute ischemic stroke(AIS).It has been found that the brain renin-angiotensin system,especially the... Cerebral ischemia-reperfusion(I/R)injury is a crucial factor that impacts the prognosis of recanalization therapy for acute ischemic stroke(AIS).It has been found that the brain renin-angiotensin system,especially the angiotensinⅡtype 1 receptor(AT1R)pathway,plays a significant role in cerebral I/R injury.This pathway is involved in processes such as oxidative stress,neuroinflammation,apoptosis,and it affects cerebrovascular autoregulation and the maintenance of blood-brain barrier.AT1R blocker(ARB),widely used as an antihypertensive agent,has demonstrated stroke prevention capabilities in numerous prospective studies,independent of its antihypertensive characteristics.Studies focusing on neurological diseases like Alzheimer's disease,Parkinson's disease,and cognitive impairment have confirmed that ARBs exhibit neuroprotective effects and aid in improving neurological functions.Preclinical studies have shown that ARBs can reduce infarct volume and brain edema,inhibit multiple signaling pathways associated with I/R injury,restore energy levels in damaged brain regions,and rescue the penumbra by promoting neovascularization in cerebral I/R models.These findings suggest that ARBs have potential to become a novel category of neuroprotecting agents for clinical treatment of Als.Therefore,this review primarily provides a theoretical foundation and practical evidence for the future clinical utilization of ARBs as neuroprotective agents following reperfusion therapy for Als.It outlines the role of cerebral I/R injury through the AT1R pathway and highlights the research progressmadeonARBs in I/Rmodels. 展开更多
关键词 acute ischemic stroke angiotensintype 1receptor blocker ischemia-reperfusion injury NEUROINFLAMMATION oxidative stress
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Angiotensin receptor blocker drugs and inhibition of adrenal beta-arrestin-1-dependent aldosterone production: Implications for heart failure therapy 被引量:12
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作者 Anastasios Lymperopoulos Beatrix Aukszi 《World Journal of Cardiology》 CAS 2017年第3期200-206,共7页
Aldosterone mediates many of the physiological and pathophysiological/cardio-toxic effects of angiotensin II(Ang II). Its synthesis and secretion from the zona glomerulosa cells of the adrenal cortex, elevated in chro... Aldosterone mediates many of the physiological and pathophysiological/cardio-toxic effects of angiotensin II(Ang II). Its synthesis and secretion from the zona glomerulosa cells of the adrenal cortex, elevated in chronic heart failure(HF), is induced by Ang II type 1 receptors(AT1Rs). The AT1R is a G protein-coupled receptor, mainly coupling to Gq/11 proteins. However, it can also signal through β-arrestin-1(βarr1) or-2(βarr2), both of which mediate G protein-independent signaling. Over the past decade, a second, Gq/11 proteinindependent but βarr1-dependent signaling pathway emanating from the adrenocortical AT1R and leading to aldosterone production has become appreciated. Thus, it became apparent that AT1R antagonists that block both pathways equally well are warranted for fully effective aldosterone suppression in HF. This spurred the comparison of all of the currently marketed angiotensin receptor blockers(ARBs, AT1R antagonists or sartans) at blocking activation of the two signaling modes(G protein-, and βarr1-dependent) at the Ang IIactivated AT1R and hence, at suppression of aldosterone in vitro and in vivo. Although all agents are very potent inhibitors of G protein activation at the AT1R, candesartan and valsartan were uncovered to be the most potent ARBs at blocking βarr activation by Ang II and at suppressing aldosterone in vitro and in vivo in post-myocardial infarction HF animals. In contrast, irbesartan and losartan are virtually G protein-"biased" blockers at the human AT1R, with very low efficacy for βarr inhibition and aldosterone suppression. Therefore, candesartan and valsartan(and other, structurally similar compounds) may be the most preferred ARB agents for HF pharmacotherapy, as well as for treatment of other conditions characterized by elevated aldosterone. 展开更多
关键词 Adrenal cortex Adrenocortical zona glomeru losa cell ALDOSTERONE angiotensin receptor blocker angiotensin II type 1 receptor β-arrestin-1 Heart failure Suppression efficacy
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High expression of type I inositol 1,4,5-trisphosphate receptor in the kidney of rats with hepatorenal syndrome
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作者 Jing-Bo Wang Ye Gu +6 位作者 Ming-Xiang Zhang Shun Yang Yan Wang Wei Wang Xi-Ran Li Yi-Tong Zhao Hai-Tao Wang 《World Journal of Gastroenterology》 SCIE CAS 2018年第29期3273-3280,共8页
AIM To detect the expression of typeⅠ inositol 1,4,5-trisphosphate receptor(IP3 RI) in the kidney of rats with hepatorenal syndrome(HRS).METHODS One hundred and twenty-five Sprague-Dawley rats were randomly divided i... AIM To detect the expression of typeⅠ inositol 1,4,5-trisphosphate receptor(IP3 RI) in the kidney of rats with hepatorenal syndrome(HRS).METHODS One hundred and twenty-five Sprague-Dawley rats were randomly divided into four groups to receive an intravenous injection of D-galactosamine(D-Gal N) plus lipopolysaccharide(LPS; group G/L, n = 50), D-Gal N alone(group G, n = 25), LPS alone(group L, n = 25), and normal saline(group NS, n = 25), respectively.At 3, 6, 9, 12, and 24 h after injection, blood, liver, and kidney samples were collected. Hematoxylineosin staining of liver tissue was performed to assess hepatocyte necrosis. Electron microscopy was used to observe ultrastructural changes in the kidney. Western blot analysis and real-time PCR were performed to detect the expression of IP3 RI protein and m RNA in the kidney, respectively.RESULTS Hepatocyte necrosis was aggravated gradually, which was most significant at 12 h after treatment with D-galactosamine/lipopolysaccharide, and was characterized by massive hepatocyte necrosis. At the same time, serum levels of biochemical indicators including liver and kidney function indexes were all significantly changed. The structure of the renal glomerulus and tubules was normal at all time points. Western blot analysis indicated that IP3 RI protein expression began to rise at 3 h(P < 0.05) and peaked at 12 h(P < 0.01). Real-time PCR demonstrated that IP3 RI m RNA expression began to rise at 3 h(P < 0.05) and peaked at 9 h(P < 0.01).CONCLUSION IP3 RI protein expression is increased in the kidney of HRS rats, and may be regulated at the transcriptional level. 展开更多
关键词 Hepatorenal syndrome type inositol 1 4 5-trisphosphate receptor Glomerular mesangial cells Vascular smooth muscle cells
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日本七鳃鳗转化生长因子βⅠ型受体基因(L-Tgfbr1)的克隆与表达分析
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作者 侯蕴轩 李文娜 +5 位作者 杨晓萱 雷丽桐 张代云 马畅蔚 王浩 《海洋科学》 CAS CSCD 北大核心 2023年第1期88-98,共11页
作为无颌类脊椎动物的现存代表之一,日本七鳃鳗(Lampetrajaponica)是研究免疫系统起源与进化的重要模型。为了探究TGF-β(Transforming growth factor beta)信号通路在日本七鳃鳗免疫调节中的功能,本研究利用PCR技术克隆了日本七鳃鳗TGF... 作为无颌类脊椎动物的现存代表之一,日本七鳃鳗(Lampetrajaponica)是研究免疫系统起源与进化的重要模型。为了探究TGF-β(Transforming growth factor beta)信号通路在日本七鳃鳗免疫调节中的功能,本研究利用PCR技术克隆了日本七鳃鳗TGF-βⅠ型受体基因(L-Tgfbr1)的编码序列,开放阅读框长度为1335 bp,编码444个氨基酸残基。L-Tgfbr1蛋白含有已知的TGF-βⅠ型受体分子的主要功能结构域,其中位于胞内的丝/苏氨酸激酶催化结构域保守性较高。系统进化树分析表明,L-Tgfbr1处于脊椎动物Tgfbr1蛋白的底端进化枝上,表明其在Tgfbr1进化史中具有原始性地位。实时定量PCR结果发现,L-Tgfbr1在心脏等组织中的转录水平较高。利用脂多糖注入七鳃鳗激活其先天性免疫应答,L-Tgfbr1在肾脏、鳃、髓小体、肝脏、白细胞、口腔腺中的转录水平呈现一过性的迅速上调。利用免疫印迹进一步验证了脂多糖免疫24 h时后L-Tgfbr1在白细胞中的蛋白表达水平显著上调。利用免疫荧光染色发现L-Tgfbr1蛋白主要分布于七鳃鳗白细胞和髓小体细胞的细胞质中。以上结果表明L-Tgfbr1及其介导的TGF-β通路可能在七鳃鳗免疫调控中发挥重要功能。 展开更多
关键词 日本七鳃鳗 转化生长因子β型受体 基因克隆 基因表达
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AT1 receptor downregulation:A mechanism for improving glucose homeostasis
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作者 Diana L Lopez Oscar E Casillas +2 位作者 Hiram J Jaramillo Tatiana Romero-Garcia J.Gustavo Vazquez-Jimenez 《World Journal of Diabetes》 SCIE 2023年第3期170-178,共9页
There is a pathophysiological correlation between arterial hypertension and diabetes mellitus, established since the pre-diabetic state in the entity known as insulin resistance. It is known that high concentrations o... There is a pathophysiological correlation between arterial hypertension and diabetes mellitus, established since the pre-diabetic state in the entity known as insulin resistance. It is known that high concentrations of angiotensin-Ⅱ enable chronic activation of the AT1 receptor, promoting sustained vasoconstriction and the consequent development of high blood pressure. Furthermore, the chronic activation of the AT1 receptor has been associated with the development of insulin resistance. From a molecular outlook, the AT1 receptor signaling pathway can activate the JNK kinase. Once activated, this kinase can block the insulin signaling pathway, favoring the resistance to this hormone. In accordance with the previously mentioned mechanisms, the negative regulation of the AT1receptor could have beneficial effects in treating metabolic syndrome and type 2diabetes mellitus. This review explains the clinical correlation of the metabolic response that diabetic patients present when receiving negatively regulatory drugs of the AT1 receptor. 展开更多
关键词 type 2 diabetes mellitus High blood pressure Insulin receptor Insulin signaling pathway AT1 receptor angiotensin II signaling pathway
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丹参酮Ⅱ_A对AngⅡ诱导的心肌成纤维细胞增殖及Ⅰ型胶原合成的影响 被引量:21
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作者 张冬梅 秦英 +3 位作者 牛福玲 朱陵群 王硕仁 姜良铎 《辽宁中医杂志》 CAS 北大核心 2008年第12期1934-1936,共3页
目的:通过观察丹参酮ⅡA(TSN)对AngⅡ诱导的心肌成纤维细胞(CFs)增殖及Ⅰ型胶原合成的影响,探讨其抗心肌纤维化的作用机制。方法:差速贴壁法提取原代CFs,采用四氮唑盐(MTT)比色法测定细胞数目,ELISA法检测Ⅰ型胶原合成,RT-PCR法半定量... 目的:通过观察丹参酮ⅡA(TSN)对AngⅡ诱导的心肌成纤维细胞(CFs)增殖及Ⅰ型胶原合成的影响,探讨其抗心肌纤维化的作用机制。方法:差速贴壁法提取原代CFs,采用四氮唑盐(MTT)比色法测定细胞数目,ELISA法检测Ⅰ型胶原合成,RT-PCR法半定量检测Ⅰ胶原mRNA表达。结果:①AngⅡ组OD值高于空白对照组,两者比较有显著性差异(P<0.01);AngⅡ+TSN组OD值低于AngⅡ组,两者比较有显著性差异(P<0.01)。②AngⅡ组有促进心肌成纤维细胞分泌Ⅰ型胶原的作用,与空白对照组比较,有显著性差异(P<0.01);AngⅡ+TSN组Ⅰ型胶原含量低于AngⅡ组,两者比较,有显著性差异(P<0.01)。③AngⅡ组Ⅰ型胶原mRNA表达高于空白对照组,两者比较有显著性差异(P<0.05);AngⅡ+TSN组Ⅰ型胶原mRNA表达低于AngⅡ组,两者比较有显著性差异(P<0.05)。结论:AngⅡ可直接诱导CFs的增殖,促进其分泌Ⅰ型胶原,并能显著增加Ⅰ型胶原mRNA的表达;TSN对AngⅡ诱导的CFs增殖及Ⅰ型胶原分泌增加,及Ⅰ型胶原mRNA表达增强均有抑制作用。提示:TSN抗心肌纤维化作用的产生可能与丹参酮ⅡA抑制心脏局部的RAS系统有关。 展开更多
关键词 丹参酮ⅡA 心肌成纤维细胞 胶原 AngⅡ
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新型AT_1受体拮抗剂Ⅰb对L-甲状腺素诱发大鼠心肌肥厚的作用 被引量:7
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作者 张静 王秋娟 +1 位作者 徐进宜 吴晓明 《中国药科大学学报》 CAS CSCD 北大核心 2006年第2期157-160,共4页
目的:观察AT1受体拮抗剂Ⅰb对L-甲状腺素诱发大鼠心肌肥厚的作用。方法:大鼠连续腹腔注射(ip)L-甲状腺素0.4 mg/kg×10 d,造成心肌肥厚模型。观察心脏重量系数,心肌组织ATP酶活力,血清CK和LDH活力以及电镜组织学变化。结果:3 mg/kg... 目的:观察AT1受体拮抗剂Ⅰb对L-甲状腺素诱发大鼠心肌肥厚的作用。方法:大鼠连续腹腔注射(ip)L-甲状腺素0.4 mg/kg×10 d,造成心肌肥厚模型。观察心脏重量系数,心肌组织ATP酶活力,血清CK和LDH活力以及电镜组织学变化。结果:3 mg/kg组化合物Ⅰb可以逆转L-甲状腺素所致大鼠的心肌肥厚,心脏重量系数明显改善,心肌组织ATP酶活力降低,血清CK和LDH活力下降。电镜结果显示心肌组织线粒体、肌纤维结构改善。结论:化合物Ⅰb可以抑制L-甲状腺素引起的大鼠心肌肥厚,明显改善心肌肥厚的各种指征。 展开更多
关键词 b L-甲状腺素 心肌肥厚 AT1受体拮抗剂
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IL-1的Ⅰ型受体在大鼠颈动脉体中的超微定位 被引量:5
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作者 王曦 王百忍 +5 位作者 贾轶 卢春荣 刘莹莹 焦西英 林爱华 鞠躬 《解剖学报》 CAS CSCD 北大核心 2004年第1期9-12,共4页
目的 研究IL 1的Ⅰ型受体 (IL 1RⅠ )在大鼠颈动脉体内的表达和亚细胞定位。 方法 灌流固定的正常大鼠颈动脉体组织 ,用冰冻置换法包埋 ,超薄切片 ,胶体金免疫组织化学染色 ,电镜下观察。 结果 IL 1RⅠ样免疫反应阳性产物主要存在... 目的 研究IL 1的Ⅰ型受体 (IL 1RⅠ )在大鼠颈动脉体内的表达和亚细胞定位。 方法 灌流固定的正常大鼠颈动脉体组织 ,用冰冻置换法包埋 ,超薄切片 ,胶体金免疫组织化学染色 ,电镜下观察。 结果 IL 1RⅠ样免疫反应阳性产物主要存在于主细胞 ,胶体金颗粒分布在胞膜、胞浆和胞浆中的细胞器及细胞核。支持细胞和毛细血管内皮细胞的胞浆中也可见少量免疫胶体金颗粒。 结论 IL 1RⅠ在大鼠颈动脉体特别是主细胞中有较强表达 ,此结果为进一步研究颈动脉体作为细胞因子化学感受器的可能性提供形态学基础。 展开更多
关键词 IL-1 型受体 大鼠 颈动脉体 超微定位 免疫电镜
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黄芪甲苷对心肌成纤维细胞Ⅰ型胶原合成的影响 被引量:4
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作者 张冬梅 秦英 +2 位作者 牛福玲 朱陵群 王硕仁 《中华中医药学刊》 CAS 2009年第5期967-969,共3页
目的:通过观察黄芪甲苷对AngⅡ诱导的心肌成纤维细胞(CFB)Ⅰ型胶原合成的影响,探讨其抗心肌纤维化的作用机制。方法:差速贴壁法提取原代CFB,采用ELISA法检测Ⅰ型胶原合成,RT-PCR法半定量检测Ⅰ胶原mRNA表达。结果:AngⅡ10-7mol/L有促进... 目的:通过观察黄芪甲苷对AngⅡ诱导的心肌成纤维细胞(CFB)Ⅰ型胶原合成的影响,探讨其抗心肌纤维化的作用机制。方法:差速贴壁法提取原代CFB,采用ELISA法检测Ⅰ型胶原合成,RT-PCR法半定量检测Ⅰ胶原mRNA表达。结果:AngⅡ10-7mol/L有促进Ⅰ型胶原mRNA表达及心肌成纤维细胞分泌Ⅰ型胶原的作用,与空白对照组比较,有显著性差异;Losartan10-6mol/L可降低AngⅡ引起的Ⅰ型胶原mRNA表达及分泌增加,两者比较有显著性差异;黄芪甲苷100μg/mL有降低AngⅡ引起Ⅰ型胶原mRNA表达及分泌增加的趋势,但无统计学意义,P>0.05。结论:AngⅡ可直接促进CFB分泌Ⅰ型胶原,并能显著增加Ⅰ型胶原mRNA的表达;黄芪甲苷对AngⅡ诱导的Ⅰ型胶原mRNA表达及分泌增加未见明显抑制作用。提示,黄芪甲苷抗心肌纤维化作用的产生可能不是通过直接抑制AngⅡ诱导的Ⅰ型胶原的合成增加来实现的。 展开更多
关键词 黄芪甲苷 心肌成纤维细胞 胶原 AngⅡ
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胰岛素样生长因子Ⅰ及其受体在子宫内膜异位症中的表达 被引量:5
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作者 苑春莉 王医术 +4 位作者 盛辉 李荷莲 马宁 王筱璐 曾晓娟 《吉林大学学报(医学版)》 CAS CSCD 北大核心 2007年第3期567-569,共3页
目的:探讨胰岛素样生长因子Ⅰ(IGF-Ⅰ)及其受体与子宫内膜异位症的关系。方法:应用免疫组织化学法(常规S-P法)对子宫内膜异位症患者的在位子宫内膜(17例)、异位子宫内膜(30例)进行IGF-Ⅰ及其受体的检测,取25例正常子宫内膜组织作为对照... 目的:探讨胰岛素样生长因子Ⅰ(IGF-Ⅰ)及其受体与子宫内膜异位症的关系。方法:应用免疫组织化学法(常规S-P法)对子宫内膜异位症患者的在位子宫内膜(17例)、异位子宫内膜(30例)进行IGF-Ⅰ及其受体的检测,取25例正常子宫内膜组织作为对照。结果:IGF-Ⅰ及其受体在3组子宫内膜的腺细胞强表达,IGF-Ⅰ在3组子宫内膜间质弱表达,IGF-Ⅰ受体在子宫内膜间质不表达。IGF-Ⅰ在子宫内膜异位症患者的在位子宫内膜、异位子宫内膜的表达均强于对照组正常子宫内膜(P<0.01)。IGF-Ⅰ受体在子宫内膜异位症患者的异位子宫内膜的表达强于其在位子宫内膜和对照组正常子宫内膜(P<0.01)。结论:IGF-Ⅰ在子宫内膜异位症的发生、发展中起促进作用。 展开更多
关键词 子宫内膜异位症 胰岛素样生长因子 受体 IGF1型
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血管紧张素Ⅱ对大鼠骨髓间充质干细胞棕色脂肪变的抑制作用
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作者 刘晨洋 王瑾 +4 位作者 张文婷 王丽清 尹晓晓 赵俊楠 焦向英 《中国组织工程研究》 CAS 北大核心 2025年第23期4859-4867,共9页
背景:骨髓间充质干细胞是脂肪细胞的来源之一,且表达所有肾素血管紧张素系统成分,但血清血管紧张素Ⅱ对骨髓间充质干细胞向棕色脂肪组织分化的影响尚不清楚。目的:观察血管紧张素Ⅱ对骨髓间充质干细胞向棕色脂肪细胞分化的影响,并探究... 背景:骨髓间充质干细胞是脂肪细胞的来源之一,且表达所有肾素血管紧张素系统成分,但血清血管紧张素Ⅱ对骨髓间充质干细胞向棕色脂肪组织分化的影响尚不清楚。目的:观察血管紧张素Ⅱ对骨髓间充质干细胞向棕色脂肪细胞分化的影响,并探究血管紧张素1a型受体敲除对血管紧张素Ⅱ影响骨髓间充质干细胞向棕色脂肪细胞分化的作用及可能机制。方法:分离培养野生型SD大鼠及血管紧张素1a型受体敲除SD大鼠的骨髓间充质干细胞,将其培养至第3代,随机分为4组:野生组,基因敲除组,野生+血管紧张素Ⅱ组,基因敲除+血管紧张素Ⅱ组,在棕色脂肪诱导分化培养基中诱导分化14 d,后2组在每次更换分化培养基的同时加入100 nmol/L血管紧张素Ⅱ进行干预。采用Western blot、qRT-PCR、免疫荧光等方法检测棕色脂肪诱导分化、脂肪分解、β氧化和线粒体生物发生等相关标记物的表达。结果与结论:血管紧张素Ⅱ可抑制骨髓间充质干细胞向棕色脂肪细胞分化,敲除血管紧张素1a型受体基因能够通过促进脂肪分解、增强脂肪酸β氧化、促进线粒体生物发生、增强线粒体功能来改善血管紧张素Ⅱ对骨髓间充质干细胞向棕色脂肪细胞分化的抑制作用。这些发现为肥胖治疗提供了新的研究方向和潜在治疗靶点,揭示了肾素血管紧张素系统在脂肪代谢中的重要作用及其作为治疗目标的潜力。 展开更多
关键词 血管紧张素Ⅱ 骨髓间充质干细胞 棕色脂肪变 线粒体 β氧化 血管紧张素Ⅱ1a受体
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