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	Provedor de dados BJMBR (16) Autor Krieger,J.E. (16) Oliveira,E.M. (4) Pereira,A.C. (4) Junqueira,M.L. (2) Mady,C. (2) Miyakawa,A.A. (2) Ramires,F.J.A. (2) Alves,M.F. (1) Aneas,I.M.S. (1) Araujo,A.Q. (1) Araujo,M.C. (1) Arteaga,E. (1) Atala,M.M. (1) Barreto-Chaves,M.L.M. (1) Benseñor,I. (1) Benvenuti,L.A. (1) Benício,A.M.D. (1) Brum,P.C. (1) Buck,P.C. (1) Cardoso,L. (1) Mais... Palavra-chave Angiotensin-converting enzyme (3) Hypertension (3) ACE activity (2) 22q11.2 (1) ACE (1) ACE polymorphism (1) APOE (1) Agonist-induced receptor internalization (1) Alcohol (1) Angiotensin II (1) Angiotensin converting enzyme (1) Angiotensin-I converting enzyme (1) Angiotensin-converting enzyme activity (1) Angiotensinogen (1) Association study (1) Autoregressive model (1) Broodstock (1) CAMP (1) Cardiac hypertrophy (1) Cardiac myocytes (1) Mais... Tipo do documento Info:eu-repo/semantics/article (14) Info:eu-repo/semantics/other (2) Ano 2009 (2) 2008 (1) 2006 (1) 2005 (1) 2004 (2) 2003 (3) 2001 (3) 2000 (2) 1999 (1) Mais... País Brazil (16) Idioma Inglês (16)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 16 Primeira ... 1 ... Última A continuous fluorescent assay for the determination of plasma and tissue angiotensin I-converting enzyme activity BJMBR Alves,M.F.; Araujo,M.C.; Juliano,M.A.; Oliveira,E.M.; Krieger,J.E.; Casarini,D.E.; Juliano,L.; Carmona,A.K.. A continuous assay using internally quenched fluorescent peptides with the general sequence Abz-peptidyl-(Dnp)P-OH (Abz = ortho-aminobenzoic acid; Dnp = 2,4-dinitrophenyl) was optimized for the measurement of angiotensin I-converting enzyme (ACE) in human plasma and rat tissues. Abz-FRK(Dnp)P-OH, which was cleaved at the Arg-Lys bond by ACE, was used for the enzyme evaluation in human plasma. Enzymatic activity was monitored by continuous recording of the fluorescence (lambdaex = 320 nm and lambdaem = 420 nm) at 37ºC, in 0.1 M Tris-HCl buffer, pH 7.0, with 50 mM NaCl and 10 µM ZnCl2. The assays can be performed directly in the cuvette of the fluorimeter and the hydrolysis followed for 5 to 10 min. ACE measurements in the plasma of 80 healthy patients with... Tipo: Info:eu-repo/semantics/article Palavras-chave: Angiotensin-converting enzyme activity; Fluorometric assay; Rat tissue angiotensin- converting enzyme; Human plasma angiotensin-converting enzyme. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000600007 Association of angiotensin-converting enzyme activity and polymorphism with echocardiographic measures in familial and nonfamilial hypertrophic cardiomyopathy BJMBR Buck,P.C.; Fernandes,F.; Arteaga,E.; Matsumoto,A.Y.; Araujo,A.Q.; Oliveira,E.M.; Ianni,B.M.; Ramires,F.J.A.; Krieger,J.E.; Mady,C.. Angiotensin-converting enzyme (ACE) activity and polymorphism contribute significantly to the prognosis of patients with cardiomyopathy. The aim of this study was to determine the activity and type of ACE polymorphism in patients with familial and nonfamilial hypertrophic cardiomyopathy (HCM) and to correlate these with echocardiographic measurements (echo-Doppler). We studied 136 patients (76 males) with HCM (69 familial and 67 nonfamilial cases). Mean age was 41 ± 17 years. DNA was extracted from blood samples for the polymerase chain reaction and the determination of plasma ACE levels. Left ventricular mass, interventricular septum, and wall thickness were measured. Mean left ventricular mass index, interventricular septum and wall thickness in familial... Tipo: Info:eu-repo/semantics/article Palavras-chave: Echocardiography; ACE activity; ACE polymorphism; Hypertrophic cardiomyopathy; Left ventricular mass index. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000800005 Characterization of six rat strains (Rattus norvegicus) by mitochondrial DNA restriction fragment length polymorphism BJMBR Hilsdorf,A.W.; Krieger,J.E.. Restriction fragment length polymorphism (RFLP) was used to examine the extent of mtDNA polymorphism among six strains of rats (Rattus norvegicus) - Wistar, Wistar Munich, Brown Norway, Wistar Kyoto, SHR and SHR-SP. A survey of 26 restriction enzymes has revealed a low level of genetic divergence among strains. The sites of cleavage by EcoRI, NcoI and XmnI were shown to be polymorphic. The use of these three enzymes allows the 6 strains to be classified into 4 haplotypes and identifies specific markers for each one. The percentage of sequence divergence among all pairs of haplotypes ranged from 0.035 to 0.33%, which is the result of a severe population constriction undergone by the strains. These haplotypes are easily demonstrable and therefore RFLP... Tipo: Info:eu-repo/semantics/article Palavras-chave: Restriction fragment length polymorphism (RFLP); Rattus norvegicus; MtDNA; Laboratory rats; Genetic monitoring. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000300003 Collagen content, but not the ratios of collagen type III/I mRNAs, differs among hypertensive, alcoholic, and idiopathic dilated cardiomyopathy BJMBR Soufen,H.N.; Salemi,V.M.C.; Aneas,I.M.S.; Ramires,F.J.A.; Benício,A.M.D.; Benvenuti,L.A.; Krieger,J.E.; Mady,C.. Cardiac interstitial fibrosis may contribute to ventricular dysfunction and the prognosis of patients with dilated cardiomyopathy. The objective of the present study was to determine if total myocardial collagen content and collagen type III/I (III/I ratio) mRNAs differ in hypertensive, alcoholic, and idiopathic dilated cardiomyopathy subjects. Echocardiography and exercise cardiopulmonary testing were performed in patients with idiopathic (N = 22), hypertensive (N = 12), and alcoholic (N = 11) dilated cardiomyopathy. Morphometric analysis of collagen was performed in fragments obtained by endomyocardial biopsy with picrosirius red staining. The collagen III/I ratio was determined by reverse transcription polymerase chain reaction. Samples of controls (N =... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alcohol; Heart failure; Hypertension; Dilated cardiomyopathy; Collagen. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008001200009 Control of the rat angiotensin I converting enzyme gene by CRE-like sequences BJMBR Xavier-Neto,J.; Pereira,A.C.; Oliveira,E.M.; Miyakawa,A.A.; Junqueira,M.L.; Krieger,J.E.. We characterized the role of potential cAMP-responsive elements (CRE) in basal and in induced angiotensin converting enzyme (ACE) gene promoter activity in order to shed light on the regulation of somatic ACE expression. We identified stimulators and repressors of basal expression between 122 and 288 bp and between 415 and 1303 bp upstream from the transcription start site, respectively, using a rabbit endothelial cell (REC) line. These regions also contained elements associated with the response to 8BrcAMP. When screening for CRE motifs we found pCRE, a proximal sequence between 209 and 222 bp. dCRE, a distal tandem of two CRE-like sequences conserved between rats, mice and humans, was detected between 834 and 846 bp. Gel retardation analysis of nuclear... Tipo: Info:eu-repo/semantics/article Palavras-chave: Angiotensin converting enzyme; Endothelium; CAMP; Cyclic AMP responsive element. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001000002 Critical analysis of autoregressive and fast Fourier transform markers of cardiovascular variability in rats and humans BJMBR Silva,G.J.J.; Ushizima,M.R.; Lessa,P.S.; Cardoso,L.; Drager,L.F.; Atala,M.M.; Consolim-Colombo,F.M.; Lopes,H.F.; Cestari,I.A.; Krieger,J.E.; Krieger,E.M.. The autonomic nervous system plays an important role in physiological and pathological conditions, and has been extensively evaluated by parametric and non-parametric spectral analysis. To compare the results obtained with fast Fourier transform (FFT) and the autoregressive (AR) method, we performed a comprehensive comparative study using data from humans and rats during pharmacological blockade (in rats), a postural test (in humans), and in the hypertensive state (in both humans and rats). Although postural hypotension in humans induced an increase in normalized low-frequency (LFnu) of systolic blood pressure, the increase in the ratio was detected only by AR. In rats, AR and FFT analysis did not agree for LFnu and high frequency (HFnu) under basal... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fast Fourier transform; Autoregressive model; Hypertension; SHR; Pharmacological blockade; Tilt test. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000400012 Duration-controlled swimming exercise training induces cardiac hypertrophy in mice BJMBR Evangelista,F.S.; Brum,P.C.; Krieger,J.E.. Exercise training associated with robust conditioning can be useful for the study of molecular mechanisms underlying exercise-induced cardiac hypertrophy. A swimming apparatus is described to control training regimens in terms of duration, load, and frequency of exercise. Mice were submitted to 60- vs 90-min session/day, once vs twice a day, with 2 or 4% of the weight of the mouse or no workload attached to the tail, for 4 vs 6 weeks of exercise training. Blood pressure was unchanged in all groups while resting heart rate decreased in the trained groups (8-18%). Skeletal muscle citrate synthase activity, measured spectrophotometrically, increased (45-58%) only as a result of duration and frequency-controlled exercise training, indicating that endurance... Tipo: Info:eu-repo/semantics/article Palavras-chave: Exercise training; Swimming; Cardiac hypertrophy; Mice; Myocardium. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001200018 Effect of polymorphisms of the MTHFR and APOE genes on susceptibility to diabetes and severity of diabetic retinopathy in Brazilian patients BJMBR Errera,F.I.V.; Silva,M.E.R.; Yeh,E.; Maranduba,C.M.C.; Folco,B.; Takahashi,W.; Pereira,A.C.; Krieger,J.E.; Passos-Bueno,M.R.. Diabetes mellitus (DM) is a highly prevalent complex genetic disorder. There has been a worldwide effort in the identification of susceptibility genes for DM and its complications, and the 5-10-methylenetetrahydrofolate reductase (MTHFR) and apolipoprotein-E (APOE) genes have been considered good candidate susceptibility genes to this condition. The objectives of the present study were to determine if the 677T MTHFR and epsilon2/epsilon3/epsilon4 APOE alleles are risk factors for DM and for severity of diabetic retinopathy (DR). A total of 248 individuals were studied: 107 healthy individuals and 141 diabetic patients (46 with type 1 diabetes and 95 with type 2 diabetes), who also had DR (81 with non-proliferative DR and 60 with proliferative DR). The... Tipo: Info:eu-repo/semantics/article Palavras-chave: APOE; MTHFR; Polymorphisms; Diabetes; Diabetic retinopathy. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000700005 Effect of race, genetic population structure, and genetic models in two-locus association studies: clustering of functional renin-angiotensin system gene variants in hypertension association studies BJMBR Pereira,A.C.; Mota,G.A.; Benseñor,I.; Lotufo,P.A.; Krieger,J.E.. Previous genetic association studies have overlooked the potential for biased results when analyzing different population structures in ethnically diverse populations. The purpose of the present study was to quantify this bias in two-locus association studies conducted on an admixtured urban population. We studied the genetic structure distribution of angiotensin-converting enzyme insertion/deletion (ACE I/D) and angiotensinogen methionine/threonine (M/T) polymorphisms in 382 subjects from three subgroups in a highly admixtured urban population. Group I included 150 white subjects; group II, 142 mulatto subjects, and group III, 90 black subjects. We conducted sample size simulation studies using these data in different genetic models of gene action and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypertension; Association study; Genetics; Angiotensin-converting enzyme; ACE; Angiotensinogen. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001001100008 High specificity PCR screening for 22q11.2 microdeletion in three different ethnic groups BJMBR Pereira,A.C.; Corrêa,R.F.R.; Mota,G.F.; Kim,C.A.; Mesquita,S.F.; Krieger,J.E.. Congenital heart defects are the most common of all human birth defects. Numerous studies have shown that a deletion within chromosome 22q11 is associated with DiGeorge syndrome and certain forms of sporadic congenital cardiovascular disease. We have determined the value of a PCR assay using markers D22S941, D22S944 and D22S264 designed for the screening of 22q11.2 deletion through consecutive homozygosity in an ethnically admixed urban population. The study population comprised 149 unrelated men and women from three different ethnic groups (white, mulatto and black). Test specificity for the overall population was estimated at 98.3%. We found no significant difference when comparing heterozygosity indices and ethnicity (P value = 0.43 (D22S944), 0.22... Tipo: Info:eu-repo/semantics/article Palavras-chave: DiGeorge syndrome; PCR screening; 22q11.2. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001000012 Ligand-induced endocytosis and nuclear localization of angiotensin II receptors expressed in CHO cells BJMBR Merjan,A.J.; Kanashiro,C.A.; Krieger,J.E.; Han,S.W.; Paiva,A.C.M.. A construct (AT1R-NF) containing a "Flag" sequence added to the N-terminus of the rat AT1 receptor was stably expressed in Chinese hamster ovary cells and quantified in the cell membrane by confocal microscopy after reaction with a fluorescein-labeled anti-Flag monoclonal antibody. Angiotensin II bound to AT1R-NF and induced endocytosis with a half-time of 2 min. After 60-90 min, fluorescence accumulated around the cell nucleus, suggesting migration of the ligand-receptor complex to the nuclear membrane. Angiotensin antagonists also induced endocytosis, suggesting that a common step in the transduction signal mechanism occurring after ligand binding may be responsible for the ligand-receptor complex internalization. Tipo: Info:eu-repo/semantics/article Palavras-chave: Angiotensin II; Agonist-induced receptor internalization; Endocytosis; Fluorescence-tagged receptor; Nuclear angiotensin receptors; Renin-angiotensin system. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000900011 Nitric oxide regulates angiotensin-I converting enzyme under static conditions but not under shear stress BJMBR Pertrini,C.M.; Miyakawa,A.A.; Laurindo,F.R.M.; Krieger,J.E.. Mechanical forces including pressure and shear stress play an important role in vascular homeostasis via the control of the production and release of a variety of vasoactive factors. An increase in vascular shear stress is accompanied by nitric oxide (NO) release and NO synthase activation. Previously, we have demonstrated that shear stress induces angiotensin-I converting enzyme (ACE) down-regulation in vivo and in vitro. In the present study, we determined whether NO participates in the shear stress-induced ACE suppression response. Rabbit aortic endothelial cells were evaluated using the NO synthase inhibitor L-NAME, and two NO donors, diethylamine NONOate (DEA/NO) and sodium nitroprusside (SNP). Under static conditions, incubation of endothelial cells... Tipo: Info:eu-repo/semantics/other Palavras-chave: Shear stress; Angiotensin-I converting enzyme; Nitric oxide; Endothelial cells. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000900005 Restriction site heteroplasmy in the mitochondrial DNA of Brycon opalinus (Cuvier, 1819) (Characiformes, Characidae, Bryconiae) BJMBR Hilsdorf,A.W.S.; Krieger,J.E.. Homoplasmy is a feature usually found in the mtDNA of higher animal taxa. On the other hand, the presence of two classes of mtDNA in the same cell or organism is rare and may appear in length or site variation. Data from mtDNA RFLP analysis of Brycon opalinus populations (Cuvier, 1819; Characiformes, Characidae, Bryconinae) revealed site heteroplasmy from endonuclease NheI digestion. Southern blotting hybridization was used to survey a total of 257 specimens with 24 restriction enzymes. Three different restriction fragment patterns of mtDNA were obtained from NheI digestion. Two individuals from hatchery broodstock were found to have two of them. NheI digests of heteroplasmic individuals yielded two fragments of approximately 1180 and 1260 bp. Despite the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Restriction enzymes; Broodstock; Fish. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300003 Standardization of a fluorimetric assay for the determination of tissue angiotensin-converting enzyme activity in rats BJMBR Oliveira,E.M.; Santos,R.A.S.; Krieger,J.E.. The tripeptide Hip-His-Leu was used to standardize a fluorimetric method to measure tissue angiotensin-converting enzyme (ACE) activity in rats. The fluorescence of the o-phthaldialdehyde-His-Leu adduct was compared in the presence and absence of the homogenate (25 µl) to determine whether the homogenate from different tissues interfered with the fluorimetric determination of the His-Leu product. Only homogenates from lung and renal medulla and cortex showed significantly altered fluorescence intensity. To overcome this problem, the homogenate from these tissues were diluted 10 times with assay buffer. The specificity of the assay was demonstrated by the inhibition of ACE activity with 3 µM enalaprilat (MK-422). There was a linear relationship between... Tipo: Info:eu-repo/semantics/article Palavras-chave: Angiotensin-converting enzyme; ACE activity; Fluorimetric assay; Rat tissues. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000700005 Stimulatory effect of dexamethasone on angiotensin-converting enzyme in neonatal rat cardiac myocytes BJMBR Barreto-Chaves,M.L.M.; Heimann,A.; Krieger,J.E.. Angiotensin-converting enzyme (ACE) plays a central role in cardiac remodeling associated with pathological conditions such as myocardial infarction. The existence of different cell types in the heart expressing components of the renin-angiotensin system makes it difficult to evaluate their relative role under physiological and pathological conditions. Since myocytes are the predominant cellular constituent of the heart by mass, in the present study we studied the effects of glucocorticoids on ACE activity using well-defined cultures of neonatal rat cardiac myocytes. Under steady-state conditions, ACE activity was present at very low levels, but after dexamethasone treatment ACE activity increased significantly (100 nmol/l after 24 h) in a time-dependent... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dexamethasone; Cardiac myocytes; Angiotensin-converting enzyme. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000600007 The Agamma-195 (C->G) mutation in hereditary persistence of fetal hemoglobin is not associated with activation of a reporter gene in vitro BJMBR Schreiber,R.; Gonçalves,M.S.; Junqueira,M.L.; Saad,S.T.O.; Krieger,J.E.; Costa,F.F.. Hereditary persistence of fetal hemoglobin is an uncommon, benign disorder in which the expression of gamma-globin genes persists into adult life. Several point mutations have been associated with the increased gamma-globin gene promoter activity. We evaluated the -195 (C->G) mutation by a functional in vitro assay based on the luciferase reporter gene system. The results indicated that the increased promoter activity observed in vivo could not be reproduced in vitro under the conditions employed, suggesting that other factors may be involved in the overexpression of the gamma-globin gene containing the -195 (C->G) mutation. Furthermore, this is the first time that the -195 (C->G) mutation of the Agamma-globin gene has been evaluated by in vitro... Tipo: Info:eu-repo/semantics/other Palavras-chave: Fetal hemoglobin; Hereditary persistence of fetal hemoglobin; HPFH; Transient expression. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000400008 Registros recuperados: 16 Primeira ... 1 ... Última

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