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‣ Disease progression after R-CHOP treatment associated with the loss of CD20 antigen expression

BELLESSO, Marcelo; XAVIER, Flavia Dias; COSTA, Renata Oliveira; PEREIRA, Juliana; SIQUEIRA, Sheila Aparecida Coelho; CHAMONE, Dalton Alencar Fischer
Fonte: Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea Publicador: Associação Brasileira de Hematologia e Hemoterapia e daSociedade Brasileira de Transplante de Medula Óssea
Tipo: Relatório
Português
Relevância na Pesquisa
56.6429%
A case of a follicular lymphoma transformed into a CD20+ is described which progressed with the loss of CD20 expression after 8 cycles of R-CHOP. This phenomenon is not a rare event and has shown poor prognosis. Our purposes are to describe this event and suggest biopsy in relapsed or progressive disease.

‣ Ploidia de DNA, grau nuclear e alterações arquiteturais no carcinoma in situ e no carcinoma ductal invasivo da mama feminina: uma contribuição para o estudo do modelo de progressão de doença; DNA ploidy, nuclear grade and architectural changes in ductal carcinoma in situ and in invasive female breast cancer: a contributory study for the model of disease progression

Moraes, Francisco Ribeiro de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 18/04/2005 Português
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Carcinogênese é um fenômeno de múltiplas fases. A literatura recente aceita, baseada em evidências epidemiológicas, que a progressão neoplásica em direção ao carcinoma invasor da mama inicia-se em estados hiperplásicos do epitélio ductal, passando pelo carcinoma in situ. Questões abertas na literatura no que concerne à relação existente entre o carcinoma intraductal e o carcinoma ductal invasivo referem-se aos fatores envolvidos nos processos que levam à invasão tumoral. Quatro modelos de progressão de doença foram propostos baseados na morfologia dessas lesões. Três deles descreveriam diferentes vias de progressão direta do carcinoma intraductal para o carcinoma invasor. O quarto modelo propõe que a evolução do carcinoma intraductal e do carcinoma invasor se faz independentemente, "em paralelo", a partir de uma terceira lesão precursora comum que, na verdade, gera um tumor de colisão in situ e invasor. O presente trabalho estudou retrospectivamente o tecido tumoral da mama de 46 pacientes do sexo feminino que continham carcinoma intraductal associado ao componente invasor na mesma lesão. Foram determinados o conteúdo de DNA nuclear por citometria estática e o grau nuclear de ambas as lesões, assim como o padrão arquitetural do componente intraductal e o índice de formação de túbulos do componente invasor. Os resultados mostraram relação estatisticamente significante (kappa=0...

‣ Análise dos fatores de risco para doença cardiovascular na progressão da doença renal crônica; Analysis of cardiovascular disease risk factors in the chronic kidney disease progression

Silva, Luciana Cristina Pereira da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 27/07/2007 Português
Relevância na Pesquisa
57.106504%
INTRODUÇÃO: O elevado número de fatores de risco para doença cardiovascular (DCV) é evidente em portadores de doença renal crônica (DRC). Parece que estes fatores de risco estão intrinsicamente ligados à progressão da DRC. O objetivo deste estudo foi determinar os fatores de risco para DCV independentemente associados à progressão da DRC. MÉTODOS: Através da análise prospectiva, avaliamos os fatores de risco tradicionais, não-tradicionais e os relacionados à DRC em 112 pacientes consecutivos portadores de DRC (clearance de creatinina entre 15 - 89 ml/min),. A progressão da DRC foi avaliada pela variação do clearance de creatinina (DClCr) durante o seguimento, sendo os pacientes estratificados em dois grupos: não-progressores e progressores. RESULTADOS: A frequência dos fatores de risco para DCV foi muito alta e a mediana do DClCr foi de 2,445 ml/min/ano, durante o seguimento. No início do seguimento, não havia diferença significante entre os grupos, quanto ao sexo, raça, clearance de creatinina, IMC, pressão arterial sistólica (PAS) e diastólica (PAD), índice cintura-quadril (ICQ), colesterol total, HDL-colesterol, triglicérides, marcadores inflamatórios, hemoglobina, hematócrito, paratormônio (PTHi)...

‣ Oxidative stress and interleukin-6 secretion during the progression of type 1 diabetes

Reis,Janice Sepúlveda; Amaral,Clara Araújo Veloso; Volpe,Caroline Maria Oliveira; Fernandes,Jamille Silveira; Borges,Erica Abreu; Isoni,Camila Armond; Anjos,Paula Martins Ferreira dos; Machado,José Augusto Nogueira
Fonte: Sociedade Brasileira de Endocrinologia e Metabologia Publicador: Sociedade Brasileira de Endocrinologia e Metabologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2012 Português
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OBJECTIVE: To evaluate inflammatory, oxidizing, and reducing responses during the progression of type 1 diabetes mellitus (T1DM) in patients without chronic complications. SUBJECTS AND METHODS: Plasma antioxidant status, reactive oxygen species (ROS), and interleukin-6 (IL-6) were measured in 42 patients with T1DM and in 24 healthy subjects. RESULTS: Significant increases were detected in the median values of ROS and IL-6 in patients with T1DM compared with healthy subjects (ROS ~ 4,836 vs. 2,036 RLU/min, respectively; P < .05: IL-6 ~ 14.2 vs. 9.7 pg/mL, respectively; P = .002). No significant between-group differences (P > 0.05) were observed in oxidizing responses or in IL-6 concentrations when diabetic patients were grouped according to time after diagnosis (0 - 10, 10 - 20 and > 20 years). Plasma antioxidant responses were similar in patients with T1DM and in healthy subjects. CONCLUSIONS: Our results demonstrate that oxidizing and inflammatory responses are increased at the onset of T1DM, but remain unchanged during disease progression. These findings suggest that functional changes involved in diabetic complications may commence in the first years after diagnosis.

‣ Medical decision, persistence of initial treatment, and glaucoma progression in a Brazilian reference hospital

Paula,Jayter Silva; Ramos Filho,José Afonso; Cecchetti,Daniel Felipe Alves; Nagatsuyu,Daniela Tiemi; Rodrigues,Maria de Lourdes Veronese; Rocha,Eduardo Melani
Fonte: Conselho Brasileiro de Oftalmologia Publicador: Conselho Brasileiro de Oftalmologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2010 Português
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PURPOSE: To evaluate the initial medical decision regarding primary open-angle glaucoma (POAG) treatment in a referral center, and to assess the relationship between the persistence of treatment and the disease progression in cases managed exclusively with medication. METHODS: A retrospective chart review was performed for 65 patients with primary open-angle glaucoma referred to a tertiary hospital. The following clinical data were analyzed: initial medication, persistence of treatment, best corrected visual acuity, visual field mean deviation index, cup/disc ratio, and intraocular pressure. Patients were classified into four categories in order to verify the clinical evolution. RESULTS: The mean number of visits/ year was 4.4 ± 3.5, and the follow-up period was 40.7 ± 22.8 months. Mean persistence time was 12.9 ± 13.9 months. By six and twelve months, respectively, 39.1% and 62.5% of patients had discontinued the initially prescribed regimen, mainly by adding to (42%) or changing (26%) the course of treatment. Thirteen patients (21%) were reclassified to a worse category of primary open-angle glaucoma, however, despite this trend, no significant correlation was found between shorter persistence and primary open-angle glaucoma worsening. CONCLUSIONS: Persistence rates with initial therapy schemes were low...

‣ Markers, Cofactors and Staging Systems in the Study of HIV Disease Progression: A Review

Fonte: Instituto Oswaldo Cruz, Ministério da Saúde Publicador: Instituto Oswaldo Cruz, Ministério da Saúde
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/1997 Português
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This paper is aimed at providing a comprehensive review of markers, cofactors and staging systems used for HIV disease, focusing on some aspects that nowadays could even be considered historical, and advancing in current issues such as the prognostic value of viral load measurements, viral genotypic and phenotypic characterization, and new HIV disease treatment protocols. CD4+ cell values, combined with the new viral markers mentioned are promising as a parsimonious predictor set for defining both severity and progression. An adequate predictor of patient resource use for planning purposes still needs to be defined

‣ alpha-Smooth muscle actin and proliferating cell nuclear antigen expression in focal segmental glomerulosclerosis: functional and structural parameters of renal disease progression

Geleilete,T.J.M.; Costa,R.S.; Dantas,M.; Coimbra,T.M.
Fonte: Associação Brasileira de Divulgação Científica Publicador: Associação Brasileira de Divulgação Científica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2001 Português
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The aim of the present study was to investigate the expression of alpha-smooth muscle actin (alpha-SM-actin) and proliferating cell nuclear antigen (PCNA) in renal cortex from patients with focal segmental glomerulosclerosis (FSGS) and their correlations with parameters of renal disease progression. We analyzed renal biopsies from 41 patients with idiopathic FSGS and from 14 control individuals. The alpha-SM-actin immunoreaction was evaluated using a score that reflected the changes in the extent and intensity of staining in the glomerular or cortical area. The PCNA reaction was quantified by counting the labeled cells of the glomeruli or renal cortex. The results, reported as median ± percentile (25th; 75th), showed that the alpha-SM-actin scores in the glomeruli and tubulointerstitium from the renal cortex were 2.0 (2.0; 4.0) and 3.0 (3.0; 4.0), respectively, in patients with FSGS, and 0.5 (0.0; 1.0) and 0.0 (0.0; 0.5) in the controls. The number of PCNA-positive cells per glomerulus and graded field of tubulointerstitium from the renal cortex was 0.2 (0.0; 0.4) and 1.1 (0.3; 2.2), respectively, for patients with FSGS, and 0.0 (0.0; 0.5) and 0.0 (0.0; 0.0) for controls. The present data showed an increase of alpha-SM-actin and PCNA expression in glomeruli and renal cortex from FSGS patients. The extent of immunoreaction for alpha-SM-actin in the tubulointerstitial area was correlated with the intensity of proteinuria. However...

‣ CCR5 genotypes and progression to HIV disease in perinatally infected children

Angelis,Daniela Souza Araújo de; Freire,Wilton Santos; Pannuti,Cláudio Sergio; Succi,Regina Célia de Menezes; Machado,Daisy Maria
Fonte: Brazilian Society of Infectious Diseases Publicador: Brazilian Society of Infectious Diseases
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2007 Português
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The CCR5 molecule, a chemokine receptor, is the most important co-receptor for macrophage-tropic HIV-1. A 32-bp deletion in the gene encoding CCR5 (CCR5-del32) confers nearly complete resistance to HIV-1 infection in homozygotes, and slows the rate of progression to AIDS in heterozygous adults. The aim of this study was to describe the CCR5 genotypes and the characteristics of HIV disease progression in perinatally infected children. From a total of 51 children analyzed for the CCR5-del32 mutation, 18 (35%) were considered to be rapid progressors, 28 (55%) were moderate progressors and 5 (10%) were slow progressors. A portion of the CCR5 gene was amplified by PCR from genomic DNA followed by agarose gel electrophoresis. Forty-nine children (96%) carried the homozygous wild type genotype for CCR5 while 2 (4%) carried the heterozygous wt/del32 genotype. In the population studied, the CCR5 genotype was unable to account for the differences in pattern of the disease progression among the three groups (rapid, moderate and slow progressors), and the allele frequency of CCR5-del32 was too low to allow statistical comparisons with adequate resolving power. Studies on larger populations may help to further elucidate the role of this allele and other host factors in the regulation of HIV-1 pathogenesis in children.

‣ Association of X4 tropism with disease progression in antiretroviral-treated children and adolescents living with HIV/AIDS in São Paulo, Brazil

Almeida,Flávia Jacqueline; Zaparoli,Mayra Simioni; Moreira,Denise Helena; Cavalcanti,Jaqueline de Souza; Rodrigues,Rosangela; Berezin,Eitan Naaman; Ferreira,João Leandro de Paula; Sáfadi,Marco Aurélio Palazzi; Brígido,Luis Fernando de Macedo
Fonte: Brazilian Society of Infectious Diseases Publicador: Brazilian Society of Infectious Diseases
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2014 Português
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Management of children with HIV/AIDS is specially challenging. Age-related issues do not allow for direct transposition of adult observations to this population. CXCR4 tropism has been associated with disease progression in adults. The geno2pheno web-base is a friendly tool to predict viral tropism on envelope V3 sequences, generating a false positive rate for a CXCR4 prediction. We evaluated the association of HIV-1 tropism prediction with clinical and laboratory outcome of 73 children with HIV/AIDS in São Paulo, Brazil. The CXCR4 tropism was strongly associated with a lower (nadir) CD4 documented during follow-up (p < 0.0001) and with disease severity (clinical event and/or CD4 below 200 cells/mm3) at the last observation, using commonly applied clinical cutoffs, such as10%FPRclonal (p = 0.001). When variables obtained during follow-up are included, both treatment adherence and viral tropism show a significant association with disease severity. As for viremia suppression, 30% (22/73) were undetectable at the last observation, with only adherence strongly associated with suppression after adjustment. The study brings further support to the notion that antiretroviral treatment adherence is pivotal to management of HIV disease...

‣ Disease progression after R-CHOP treatment associated with the loss of CD20 antigen expression

Bellesso,Marcelo; Xavier,Flavia Dias; Costa,Renata Oliveira; Pereira,Juliana; Siqueira,Sheila Aparecida Coelho; Chamone,Dalton Alencar Fischer
Fonte: Associação Brasileira de Hematologia e Hemoterapia e Terapia Celular Publicador: Associação Brasileira de Hematologia e Hemoterapia e Terapia Celular
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2011 Português
Relevância na Pesquisa
56.6429%
A case of a follicular lymphoma transformed into a CD20+ is described which progressed with the loss of CD20 expression after 8 cycles of R-CHOP. This phenomenon is not a rare event and has shown poor prognosis. Our purposes are to describe this event and suggest biopsy in relapsed or progressive disease.

‣ Laboratory and Clinical Predictors of Disease Progression following Initiation of Combination Therapy in HIV-Infected Adults in Thailand

Duong, Trinh; Jourdain, Gonzague Joseph Albert; Ngo-Giang-Huong, Nicole; Le Cœur, Sophie; Kantipong, Pacharee; Buranabanjasatean, Sudanee; Leenasirimakul, Prattana; Ariyadej, Sriprapar; Tansuphasawasdikul, Somboon; Thongpaen, Suchart; Lallemant, Marc Jea
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Português
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56.6429%
Background: Data on determinants of long-term disease progression in HIV-infected patients on antiretroviral therapy (ART) are limited in low and middle-income settings. Methods: Effects of current CD4 count, viral load and haemoglobin and diagnosis of AIDS-defining events (ADEs) after start of combination ART (cART) on death and new ADEs were assessed using Poisson regression, in patient aged ≥18 years within a multi-centre cohort in Thailand. Results: Among 1,572 patients, median follow-up from cART initiation was 4.4 (IQR 3.6–6.3) years. The analysis of death was based on 60 events during 6,573 person-years; 30/50 (60%) deaths with underlying cause ascertained were attributable to infections. Analysis of new ADE included 192 events during 5,865 person-years; TB and Pneumocystis jiroveci pneumonia were the most commonly presented first new ADE (35% and 20% of cases, respectively). In multivariable analyses, low current CD4 count after starting cART was the strongest predictor of death and of new ADE. Even at CD4 above 200 cells/mm3, survival improved steadily with CD4, with mortality rare at ≥500 cells/mm3 (rate 1.1 per 1,000 person-years). Haemoglobin had a strong independent effect, while viral load was weakly predictive with poorer prognosis only observed at ≥100...

‣ The Axis of Progression of Disease

Tartakoff, Alan M; Wu, Di
Fonte: Libertas Academica Publicador: Libertas Academica
Tipo: Artigo de Revista Científica
Português
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Starting with genetic or environmental perturbations, disease progression can involve a linear sequence of changes within individual cells. More often, however, a labyrinth of branching consequences emanates from the initial events. How can one repair an entity so fine and so complex that its organization and functions are only partially known? How, given the many redundancies of metabolic pathways, can interventions be effective before the last redundant element has been irreversibly damaged? Since progression ultimately proceeds beyond a point of no return, therapeutic goals must target earlier events. A key goal is therefore to identify early changes of functional importance. Moreover, when several distinct genetic or environmental causes converge on a terminal phenotype, therapeutic strategies that focus on the shared features seem unlikely to be useful – precisely because the shared events lie relatively downstream along the axis of progression. We therefore describe experimental strategies that could lead to identification of early events, both for cancer and for other diseases.

‣ Are long-lasting insecticide-treated bednets and water filters cost-effective tools for delaying HIV disease progression in Kenya?

Verguet, Stéphane; Kahn, James G.; Marseille, Elliot; Jiwani, Aliya; Kern, Eli; Walson, Judd L.
Fonte: Co-Action Publishing Publicador: Co-Action Publishing
Tipo: Artigo de Revista Científica
Português
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Background: Co-infection with malaria and other infectious diseases has been shown to increase viral load and accelerate HIV disease progression. A recent study in Kenya demonstrated that providing long-lasting insecticide-treated bednets (LLIN) and water filters (WF) to HIV-positive adults with CD4 >350 cells/mm3 significantly reduced HIV progression. Design: We conducted a cost analysis to estimate the potential net financial savings gained by delaying HIV progression and increasing the time to antiretroviral therapy (ART) eligibility through delivering LLIN and WF to 10% of HIV-positive adults with CD4 >350 cells/mm3 in Kenya. Results: Given a 3-year duration of intervention benefit, intervention unit cost of US$32 and patient-year ART cost of US$757 (2011 US$), over the lifetime of ART patients, in Kenya, we estimated the intervention could yield a return on investment (ROI) of 11 (95% uncertainty range [UR]: 5–23), based on a cost of about US$2 million and savings in ART costs of about US$26 million (95% UR: 8–50) (discounted at 3%). Our findings were subjected to a number of sensitivity analyses. Of note, deferral of time to ART eligibility could potentially result in 3,000 new HIV infections not averted by ART and thus decrease ART cost savings to US$14 million...

‣ Overweight/Obesity and HIV Disease Progression in HIV+ Adults in Botswana

Martinez, Sabrina Sales
Fonte: FIU Digital Commons Publicador: FIU Digital Commons
Tipo: Artigo de Revista Científica Formato: application/pdf
Português
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Studies indicate that overweight and obesity protect against HIV-disease progression in antiretroviral therapy (ART)-naïve patients. We examined retrospectively the relationship of overweight/obesity with HIV-disease progression in ART-naïve HIV+ adults in Botswana in a case-control study with 18-month follow-up, which included 217 participants, 139 with BMI 18.0-24.9 kg/m2 and 78 with BMI ≥25 kg/m2. Archived plasma samples were used to determine inflammatory markers: leptin and bacterial endotoxin lipopolysaccharide (LPS), and genotype single nucleotide polymorphisms (SNPs) of the Fat Mass and Obesity Associated Gene (FTO). At baseline, BMI was inversely associated with risk for AIDS-defining conditions (HR=0.218; 95%CI=0.068, 0.701, P=0.011), and higher fat mass was associated with reduced risk of the combined outcome of CD4+cell count ≤250/µL and AIDS-defining conditions, whichever occurred earlier (HR=0.918; 95%CI=0.847, 0.994, P=0.036) over 18 months, adjusting for age, gender, marriage, children, and baseline CD4+cell count and HIV-viral load. FTO-SNP rs17817449 was associated with BMI (OR=1.082; 95%CI=1.001, 1.169; P=0.047). Fat mass was associated with the risk alleles of rs1121980 (OR=1.065; 95%CI=1.009, 1.125, P=0.021)...

‣ Dual roles of PARP-1 promote cancer growth and progression

Schiewer, M.; Goodwin, J.; Han, S.; Brenner, J.; Augello, M.; Dean, J.; Liu, F.; Planck, J.; Ravindranathan, P.; Chinnaiyan, A.; McCue, P.; Gomella, L.; Raj, G.; Dicker, A.; Brody, J.; Pascal, J.; Centenera, M.; Butler, L.; Tilley, W.; Feng, F.; et al.
Fonte: American Association for Cancer Research Publicador: American Association for Cancer Research
Tipo: Artigo de Revista Científica
Publicado em //2012 Português
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UNLABELLED: PARP-1 is an abundant nuclear enzyme that modifies substrates by poly(ADP-ribose)-ylation. PARP-1 has well-described functions in DNA damage repair and also functions as a context-specific regulator of transcription factors. With multiple models, data show that PARP-1 elicits protumorigenic effects in androgen receptor (AR)-positive prostate cancer cells, in both the presence and absence of genotoxic insult. Mechanistically, PARP-1 is recruited to sites of AR function, therein promoting AR occupancy and AR function. It was further confirmed in genetically defined systems that PARP-1 supports AR transcriptional function, and that in models of advanced prostate cancer, PARP-1 enzymatic activity is enhanced, further linking PARP-1 to AR activity and disease progression. In vivo analyses show that PARP-1 activity is required for AR function in xenograft tumors, as well as tumor cell growth in vivo and generation and maintenance of castration resistance. Finally, in a novel explant system of primary human tumors, targeting PARP-1 potently suppresses tumor cell proliferation. Collectively, these studies identify novel functions of PARP-1 in promoting disease progression, and ultimately suggest that the dual functions of PARP-1 can be targeted in human prostate cancer to suppress tumor growth and progression to castration resistance. SIGNIFICANCE: These studies introduce a paradigm shift with regard to PARP-1 function in human malignancy...

‣ Effect of aliskiren on progression of coronary disease in patients with prehypertension: The AQUARIUS randomized clinical trial

Nicholls, S.; Bakris, G.; Kastelein, J.; Menon, V.; Williams, B.; Armbercht, J.; Brunel, P.; Nicolaides, M.; Hsu, A.; Hu, B.; Fang, H.; Puri, R.; Uno, K.; Kataoka, Y.; Bash, D.; Nissen, S.
Fonte: American Medical Association Publicador: American Medical Association
Tipo: Artigo de Revista Científica
Publicado em //2013 Português
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IMPORTANCE Blood pressure reduction and renin-angiotensin-aldosterone system inhibition are targets for treatment of atherosclerosis. The effect of renin inhibition on coronary disease progression has not been investigated. OBJECTIVE To determine the effects of renin inhibition with aliskiren on progression of coronary atherosclerosis. DESIGN, SETTING, AND PARTICIPANTS A double-blind, randomized, multicenter trial (Aliskiren Quantitative Atherosclerosis Regression Intravascular Ultrasound Study) comparing aliskiren with placebo in 613 participants with coronary artery disease, systolic blood pressure between 125 and 139 mm Hg (prehypertension range), and 2 additional cardiovascular risk factors conducted at 103 academic and community hospitals in Europe, Australia, and North and South America (enrollment from March 2009 to February 2011; end of follow-up: January 31, 2013). INTERVENTIONS Participants underwent coronary intravascular ultrasound (IVUS) imaging and were randomized to receive 300 mg of aliskiren (n = 305) or placebo (n = 308) taken orally daily for 104 weeks. Disease progression was measured by repeat IVUS examination after at least 72 weeks of treatment. MAIN OUTCOMES AND MEASURES The primary efficacy parameter was the change in percent atheroma volume (PAV) from baseline to study completion. Secondary efficacy parameters included the change in normalized total atheroma volume (TAV) and the percentage of participants with atheroma regression. Safety and tolerability were also assessed. RESULTS Evaluable imaging data were available at baseline and follow-up for 458 participants (74.7%). The primary IVUS efficacy parameter...

‣ Interactions between inflammatory activation and endothelial dysfunction selectively modulate valve disease progression in patients with bicuspid aortic valve

Ali, O.A.; Chapman, M.; Thanh, H.N.; Chirkov, Y.Y.; Heresztyn, T.; Mundisugih, J.; Horowitz, J.D.
Fonte: BMJ Publishing Group Publicador: BMJ Publishing Group
Tipo: Artigo de Revista Científica
Publicado em //2014 Português
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OBJECTIVES: Bicuspid aortic valve (BAV) is associated with increased risk of valvular degeneration and ascending aortic aneurysm formation and rupture. We sought to evaluate the roles of endothelial dysfunction and inflammatory activation in modulating these processes. METHODS: We performed a case-control study of patients with BAV together with a multivariate analysis within the BAV group to identify factors associated with: development of significant valvular disease; dilatation of the ascending aorta; differential valve relative to aortic disease. Endothelial function of patients and controls was evaluated via flow-mediated dilatation (FMD) and plasma concentrations of asymmetric dimethylarginine (ADMA). Correlations with inflammatory markers and endothelial progenitor cell counts were also examined. Morphological and physiological assessment of the valve and ascending aorta was performed with transthoracic echocardiography and MRI. RESULTS: Patients with BAV (n=43) and controls (n=25) were matched for age and gender. FMD was significantly lower in patients than controls (7.85±3.48% vs 11.58±3.98%, p=0.001), and these differences were age-independent. Within the BAV cohort, multivariate correlates of peak aortic valve velocity were plasma concentrations of ADMA and myeloperoxidase (MPO) (both p<0.01)...

‣ Achieving early molecular response in chronic myeloid leukemia in chronic phase to reduce the risk of progression: clinical relevance of the 3- and 6-month time points

Lapusan, S.; Yong, A.; Savani, B.N.; Mohty, M.
Fonte: Wiley Publicador: Wiley
Tipo: Artigo de Revista Científica
Publicado em //2015 Português
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Patients with chronic myeloid leukemia in chronic phase who achieve early molecular response (EMR; generally defined as BCR-ABL ≤ 10% on the International Scale at 3 or 6 months) have improved outcomes. However, there is no consensus on whether EMR failure at 3 months requires a change in therapy, and the value of the 6-month time point remains under debate. Some patients who do not achieve EMR at 3 months achieve significant decreases in BCR-ABL levels by 6 months, whereas others have progressive disease. For patients who do not achieve EMR at either time point, the risk of disease progression is higher both between 3 and 6 months and over the longer term, underlining the therapeutic relevance of the 3- to 6-month time period. For patients with EMR failure at 3 months, although there is currently no consensus on whether to switch therapy or wait until the 6-month assessment, some patients may benefit from an early change in treatment. This review synthesizes key clinical data demonstrating improved outcomes associated with the achievement of EMR and discusses the relevance of the 3- and 6-month time points on survival and the risk of disease progression. Several potential clinical situations are also presented to explore when a change in therapy may be considered.; Simona Lapusan...

‣ Effect of GSTM1-Polymorphism on Disease Progression and Oxidative Stress in HIV Infection: Modulation by HIV/HCV Co- Infection and Alcohol Consumption

Parsons, Mary; Campa, Adriana; Lai, Shenghan; Li, Yinghui; Diaz Martinez, Janet; Murillo, Jorge; Greer, Pedro; Martinez, Sabrina Sales; Baum, Marianna K.
Fonte: FIU Digital Commons Publicador: FIU Digital Commons
Tipo: Artigo de Revista Científica Formato: application/pdf
Português
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Objective—To examine the effects of GSTM1 null-allele polymorphism on oxidative stress and disease progression in HIV infected and HIV/hepatitis C (HCV) co-infected adults. Methods—HIV-infected and HIV/HCV co-infected participants aged 40–60 years old with CD4 cell count >350 cells/ μl, were recruited. GSTM1 genotype was determined by quantitative PCR. Oxidative stress (mitochondrial 8-oxo-2’-deoxyguanosine [8-oxo-dG], malondialdehyde [MDA], oxidized glutathione and Complexes I and IV), apoptosis and HIV disease (CD4 count and viral load) markers were measured. Gene copies were not quantified, thus the Hardy-Weinberg formula was not applicable. Results—Of the 129 HIV-infected participants, 58 were HIV/HCV co-infected. GSTM1 occurred in 66% (62/94) in those of African descent, and 33% (11/33) of the Caucasians. Those with GSTM1 coding for the functional antioxidant enzyme Glutathione S-transferase (GST), had higher CD4 cell count (β=3.48, p=0.034), lower HIV viral load (β=−0.536, p=0.018), and lower mitochondrial 8-oxo-dG (β=−0.28, p=0.03). ART reduced oxidative stress in the participants with the GSTM1 coding for the functional antioxidant enzyme. HIV/HCV co-infected participants with the GSTM1 coding for the functional antioxidant enzyme also had lower HIV viral load...

‣ FATORES EPIDEMIOLÓGICOS, RELACIONADOS À PROGRESSÃO LENTA DA SÍNDROME DA IMUNODEFICIÊNCIA ADQUIRIDA (AIDS); EPIDEMIOLOGICAL FACTORS RELATED TO SLOW PROGRESSION OF THE ACQUIRED IMMUNE DEFICIENCY SYNDROME (AIDS)

Vasconcelos, Gabriel S.; Machado, Alcyone A.; Covas, Dimas T.; Watanabe, Angélica E.; Kashima, Simone; Orellana, Maristela D.; Silva, Ane R.L.
Fonte: Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto Publicador: Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 30/06/2000 Português
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Com o objetivo de identificação de fatores envolvidos na progressão lenta para aids, realizou-se estudo transversal para avaliação de dados epidemiológicos de indivíduos infectados pelo Vírus da Imunodeficiência Humana tipo 1 (HIV-1), atendidos no Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto-USP. Foram selecionados pacientes, conforme critérios definidos, constituindo duas populações: população 1, composta por lentos progressores (P1), que possuía anticorpos anti-HIV há mais de oito anos e com ocorrência de menos de duas doenças oportunistas no último ano, e a população 2 (P2), pacientes rápidos progressores, com diagnóstico de infecção pelo HIV e doença manifesta a menos de dois anos e com mais de duas doenças oportunistas, diagnosticadas no último ano. Todos os indivíduos foram submetidos a questionário, contendo dados demográficos, profissão, ocorrência de outras doenças sexualmente transmissíveis, forma de contágio, data de diagnóstico e hábitos. O período do estudo foi de março de 1998 a outubro de 1999. Obtivemos na P1: doze homens e quatro mulheres, idade média 30,7 anos, forma de contágio predominantemente sangüínea, tempo de progressão da doença 10,5 anos; P2: 12 homens e 4 mulheres; idade média 34...