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Registros recuperados: 7
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Thyrotropin and free thyroxine levels and coronary artery disease: cross-sectional analysis of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) BJMBR
de Miranda,E.J.F. Peixoto; Bittencourt,M.S.; Staniak,H.L.; Sharovsky,R.; Pereira,A.C.; Foppa,M.; Santos,I.S.; Lotufo,P.A.; Benseñor,I.M..
Data on the association between subclinical thyroid dysfunction and coronary artery disease (CAD) is scarce. We aimed to analyze the association between thyroid function and CAD using baseline data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). We included subjects with normal thyroid function (0.4-4.0 mIU/L, and normal free thyroxine, FT4, or 0.8 to 1.9 ng/dL), subclinical hypothyroidism (SCHypo; TSH>4.0 mIU/L and normal FT4), and subclinical hyperthyroidism (SCHyper; TSH<0.4 mIU/L and normal FT4) evaluated by coronary computed tomography angiography. We excluded individuals using medications that interfere in thyroid function or with past medical history of cardiovascular disease. Logistic regression models evaluated the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thyroid disorders; Thyrotropin levels; Coronary artery disease; Coronary computed tomography angiography; Subclinical atherosclerosis; Cardiovascular disease.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000500609
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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
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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
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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
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Nitric oxide synthesis and biological functions of nitric oxide released from ruthenium compounds BJMBR
Pereira,A.C.; Paulo,M.; Araújo,A.V.; Rodrigues,G.J.; Bendhack,L.M..
During three decades, an enormous number of studies have demonstrated the critical role of nitric oxide (NO) as a second messenger engaged in the activation of many systems including vascular smooth muscle relaxation. The underlying cellular mechanisms involved in vasodilatation are essentially due to soluble guanylyl-cyclase (sGC) modulation in the cytoplasm of vascular smooth cells. sGC activation culminates in cyclic GMP (cGMP) production, which in turn leads to protein kinase G (PKG) activation. NO binds to the sGC heme moiety, thereby activating this enzyme. Activation of the NO-sGC-cGMP-PKG pathway entails Ca2+ signaling reduction and vasodilatation. Endothelium dysfunction leads to decreased production or bioavailability of endogenous NO that could...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitric oxide; Vasodilatation; Ruthenium complex; NO-synthase; Resistance artery; Conduit vessel.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000900017
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Variants of transcription factor 7-like 2 (TCF7L2) gene and incident glucose intolerance in Japanese-Brazilians BJMBR
Franco,L.F.; Crispim,F.; Pereira,A.C.; Moisés,R.S..
Common variants of the transcription factor 7-like 2 (TCF7L2) gene have been found to be associated with type 2 diabetes in different ethnic groups. The Japanese-Brazilian population has one of the highest prevalence rates of diabetes. Therefore, the aim of the present study was to assess whether two single-nucleotide polymorphisms (SNPs) of TCF7L2, rs7903146 and rs12255372, could predict the development of glucose intolerance in Japanese-Brazilians. In a population-based 7-year prospective study, we genotyped 222 individuals (72 males and 150 females, aged 56.2 ± 10.5 years) with normal glucose tolerance at baseline. In the study population, we found that the minor allele frequency was 0.05 for SNP rs7903146 and 0.03 for SNP rs12255372. No significant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: TCF7L2; Glucose intolerance; Japanese-Brazilians.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000300011
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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
Registros recuperados: 7
Primeira ... 1 ... Última
 

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