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Comportamento dos marcadores inflamatórios e de injúria miocárdica na cirurgia cardíaca : correlação laboratorial com quadro clínico de síndrome pós-pericardiotomia; Behavior of inflammatory markers of myocardial injury in cardiac surgery : laboratory correlation with the clinical picture of potpericardiotomy syndrome

Kohler, Ilmar; Saraiva, Paulo Jaconi; Wender, Orlando Carlos Belmonte; Zago, Alcides José
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: application/pdf
POR
Relevância na Pesquisa
46.28%
Objective- To verify the association of serum markers of myocardial injury, such as troponin I, creatinine kinase, and creatinine kinase isoenzyme MB, and inflammatory markers, such as tumor necrosis factor alpha (TNF-alpha), C-reactive protein, and the erythrocyte sedimentation rate in the perioperative period of cardiac surgery, with the occurrence of possible postpericardiotomy syndrome. Methods- This was a cohort study with 96 patients undergoing cardiac surgery assessed at the following 4 different time periods: the day before surgery (D0); the 3rd postoperative day (D3); between the 7th and 10th postoperative days (D7-10); and the 30th postoperative day (D30). During each period, we evaluated demo- graphic variables (sex and age), surgical variables (type and duration , extracorporeal circulation), and serum dosages of the markers of myocardial injury and inflam- matory response. Results - Of all patients, 12 (12.5%) met the clinical criteria for a diagnosis of postpericardiotomy syndrome, and their mean age was 10.3 years lower than the age of the others (P=0.02). The results of the serum markers for tissue injury and inflammatory response were not signifi- cantly different between the 2 assessed groups. No signifi- cant difference existed regarding either surgery duration or extracorporeal circulation. Conclusio- The patients who met the clinical criteria for postpericardiotomy syndrome were significan- tly younger than the others were. Serum markers for tissue injury and inflammatory response were not different in the clinically affected group...

Nutritional parameters are associated with mortality in acute kidney injury

Berbel, Marina Nogueira; Goes, Cassiana Regina de; Balbi, Andre Luis; Ponce, Daniela
Fonte: Hospital Clinicas, Univ Sao Paulo Publicador: Hospital Clinicas, Univ Sao Paulo
Tipo: Artigo de Revista Científica Formato: 476-482
ENG
Relevância na Pesquisa
36.16%
OBJECTIVE: The objective of this study was to perform a nutritional assessment of acute kidney injury patients and to identify the relationship between nutritional markers and outcomes.METHOD: This was a prospective and observational study. Patients who were hospitalized at the Hospital of Botucatu School of Medicine were evaluated between January 2009 and December 2011. We evaluated a total of 133 patients with a clinical diagnosis of acute kidney injury and a clinical presentation suggestive of acute tubular necrosis. We explored the associations between clinical, laboratory and nutritional markers and in hospital mortality. Multivariable logistic regression was used to adjust for confounding and selection bias.RESULTS: Non-survivor patients were older (67 +/- 14 vs. 59 +/- 16 years) and exhibited a higher prevalence of sepsis (57.1 vs. 21.4%) and higher Acute Tubular Necrosis-Individual Severity Scores (0.60 +/- 0.22 vs. 0.41 +/- 0.21) than did survivor patients. Based on the multivariable analysis, laboratorial parameters such as blood urea nitrogen and C-reactive protein were associated with a higher risk of death (OR: 1.013, p = 0.0052; OR: 1.050, p = 0.01, respectively), and nutritional parameters such as low calorie intake...

A role for atorvastatin and insulin combination in protecting from liver injury in a model of type 2 diabetes with hyperlipidemia

Matafome, P; Nunes, E; Louro, T; Amaral, C; Crisóstomo, J; Rodrigues, L; Moedas, AR; Monteiro, P; Cipriano, MA; Seiça, R
Fonte: Centro Hospitalar e Universitário de Coimbra Publicador: Centro Hospitalar e Universitário de Coimbra
Tipo: Artigo de Revista Científica
Publicado em //2008 ENG
Relevância na Pesquisa
36.07%
Non-alcoholic fatty liver disease (NAFLD) is a major complication linked with the metabolic syndrome associated with dyslipidemia, inflammation, and oxidative stress. Impact of type 2 diabetes with hyperlipidemia in NAFLD has to be established, as well as the utility of commonly prescribed anti-diabetic and lipid-lowering agents in improving liver injury markers. Genetic type 2 diabetic Goto-Kakizaki rats were fed with a high-fat diet to test hepatic effects of type 2 diabetes with hyperlipidemia and the effect of atorvastatin and insulin, individually and in combination, in systemic and hepatic inflammatory and oxidative stress markers. High-fat diet aggravated fasting glycemia, systemic and liver lipids, and inflammatory and oxidative stress markers. Individual treatments improved glycemic and lipid profiles, but failed to improve inflammatory markers, whereas insulin was able to reduce liver oxidative stress parameters. Combination of insulin and atorvastatin further improved glycemic and lipid profiles and decreased circulating C-reactive protein levels and liver inflammatory and oxidative stress markers. Insulin and atorvastatin combination leads to better glycaemic and lipid profiles and to better protection against liver inflammation and oxidative stress...

Behavior of inflammatory markers of myocardial injury in cardiac surgery: laboratory correlation with the clinical picture of postpericardiotomy syndrome

Köhler,Ilmar; Saraiva,Paulo J.; Wender,Orlando B.; Zago,Alcides J.
Fonte: Sociedade Brasileira de Cardiologia - SBC Publicador: Sociedade Brasileira de Cardiologia - SBC
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2003 EN
Relevância na Pesquisa
46.28%
OBJECTIVE: To verify the association of serum markers of myocardial injury, such as troponin I, creatinine kinase, and creatinine kinase isoenzyme MB, and inflammatory markers, such as tumor necrosis factor alpha (TNF-alpha), C-reactive protein, and the erythrocyte sedimentation rate in the perioperative period of cardiac surgery, with the occurrence of possible postpericardiotomy syndrome. METHODS: This was a cohort study with 96 patients undergoing cardiac surgery assessed at the following 4 different time periods: the day before surgery (D0); the 3rd postoperative day (D3); between the 7th and 10th postoperative days (D7-10); and the 30th postoperative day (D30). During each period, we evaluated demographic variables (sex and age), surgical variables (type and duration , extracorporeal circulation), and serum dosages of the markers of myocardial injury and inflammatory response. RESULTS: Of all patients, 12 (12.5%) met the clinical criteria for a diagnosis of postpericardiotomy syndrome, and their mean age was 10.3 years lower than the age of the others (P=0.02). The results of the serum markers for tissue injury and inflammatory response were not significantly different between the 2 assessed groups. No significant difference existed regarding either surgery duration or extracorporeal circulation. CONCLUSION: The patients who met the clinical criteria for postpericardiotomy syndrome were significantly younger than the others were. Serum markers for tissue injury and inflammatory response were not different in the clinically affected group...

Nutritional parameters are associated with mortality in acute kidney injury

Berbel,Marina Nogueira; de Góes,Cassiana Regina; Balbi,André Luis; Ponce,Daniela
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2014 EN
Relevância na Pesquisa
36.16%
OBJECTIVE: The objective of this study was to perform a nutritional assessment of acute kidney injury patients and to identify the relationship between nutritional markers and outcomes. METHOD: This was a prospective and observational study. Patients who were hospitalized at the Hospital of Botucatu School of Medicine were evaluated between January 2009 and December 2011. We evaluated a total of 133 patients with a clinical diagnosis of acute kidney injury and a clinical presentation suggestive of acute tubular necrosis. We explored the associations between clinical, laboratory and nutritional markers and in-hospital mortality. Multivariable logistic regression was used to adjust for confounding and selection bias. RESULTS: Non-survivor patients were older (67±14 vs. 59±16 years) and exhibited a higher prevalence of sepsis (57.1 vs. 21.4%) and higher Acute Tubular Necrosis-Individual Severity Scores (0.60±0.22 vs. 0.41±0.21) than did survivor patients. Based on the multivariable analysis, laboratorial parameters such as blood urea nitrogen and C-reactive protein were associated with a higher risk of death (OR: 1.013, p = 0.0052; OR: 1.050, p = 0.01, respectively), and nutritional parameters such as low calorie intake...

Caffeine Supplementation and muscle damage in soccer players

Machado,Marco; Breder,Anselmo Carvalho; Ximenes,Marcio Carvalho; Simões,Jarbas Rodrigues; Vigo,José Fábio Florentino
Fonte: Universidade de São Paulo, Faculdade de Ciências Farmacêuticas Publicador: Universidade de São Paulo, Faculdade de Ciências Farmacêuticas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2009 EN
Relevância na Pesquisa
46.07%
The aim of this work was to evaluate the effect of caffeine supplementation and intermittent exercise on the muscle injury markers in soccer players. 15 male professional soccer players completed a placebo controlled double blind test protocol. 45 minutes before exercise, participants ingested 5.5 mg.kg-1 body mass of caffeine (EXP, n=8) or placebo (CONT, n=7). The exercise was 12 sets of 10 sprints (20 m each) with 10 sec recovery time between sprints and 2 min between sets. Blood samples were collected before (PRE) and 48h after exercise (POST). Serum activity of CK, LDH, AST, and ALT were quantified. Serum enzyme activity was enhanced by exercise in both groups, without a synergistic effect of caffeine. The findings suggest muscle injury markers concentration increases after physical activities, but caffeine supplementation (as used in this study) has no influence upon muscle cellular integrity.

Evaluation of Inflammatory and Renal-Injury Markers in Women Treated with Antibiotics for Acute Pyelonephritis Caused by Escherichia coli

Horcajada, Juan P.; Velasco, María; Filella, Xavier; Alvarez, Luisa; De Làzzari, Elisa; Marín, Jose Luis; Collvinent, Blanca; Smithson, Alex; Martínez, Jose Antonio; Noguero, Mariana; Vila, Jordi; Mensa, Josep
Fonte: American Society for Microbiology Publicador: American Society for Microbiology
Tipo: Artigo de Revista Científica
Publicado em /01/2004 EN
Relevância na Pesquisa
46.2%
The evolution and the relationship between inflammatory and renal-injury markers in women with acute uncomplicated pyelonephritis under antimicrobial therapy were investigated in a prospective study. Markers were measured before and 6 and 24 h after the intravenous administration of 1 g of ceftriaxone. Before treatment, the median levels of all markers except the serum creatinine levels were high. Twenty-four hours after the onset of antibiotic treatment, the C-reactive protein (CRP) level continued to be high, while the serum interleukin-6 (IL-6) levels and the urine IL-6, IL-8, albumin, and immunoglobulin G (IgG) levels decreased significantly. In contrast, serum creatinine and tumor necrosis factor alpha levels and urine N-acetyl-β-glucosaminidase, α1-microglobulin, and β2-microglobulin levels did not change over time. There was a significant correlation between IL-6 and IL-8 levels and urine albumin and IgG levels (urine albumin and IgG levels are glomerular and urinary tract-injury markers) as well as between serum CRP levels and the levels of the tubular-injury markers. In women with acute pyelonephritis, appropriate antibiotic treatment rapidly decreases serum IL-6 levels and urine IL-6 and IL-8 levels, which correlate well with urine albumin and IgG levels.

Reduced Production of Creatinine Limits Its Use as Marker of Kidney Injury in Sepsis

Doi, Kent; Yuen, Peter S.T.; Eisner, Christoph; Hu, Xuzhen; Leelahavanichkul, Asada; Schnermann, Jürgen; Star, Robert A.
Fonte: American Society of Nephrology Publicador: American Society of Nephrology
Tipo: Artigo de Revista Científica
Publicado em /06/2009 EN
Relevância na Pesquisa
36.12%
Although diagnosis and staging of acute kidney injury uses serum creatinine, acute changes in creatinine lag behind both renal injury and recovery. The risk for mortality increases when acute kidney injury accompanies sepsis; therefore, we sought to explore the limitations of serum creatinine in this setting. In mice, induction of sepsis by cecal ligation and puncture in bilaterally nephrectomized mice increased markers of nonrenal organ injury and serum TNF-α. Serum creatinine, however, was significantly lower in septic animals than in animals subjected to bilateral nephrectomy and sham cecal ligation and puncture. Under these conditions treatment with chloroquine decreased nonrenal organ injury markers but paradoxically increased serum creatinine. Sepsis dramatically decreased production of creatinine in nephrectomized mice, without changes in body weight, hematocrit, or extracellular fluid volume. In conclusion, sepsis reduces production of creatinine, which blunts the increase in serum creatinine after sepsis, potentially limiting the early detection of acute kidney injury. This may partially explain why small absolute increases in serum creatinine levels are associated with poor clinical outcomes. These data support the need for new biomarkers that provide better measures of renal injury...

Biomarkers for the Diagnosis of Acute Kidney Injury

Waikar, Sushrut S.; Bonventre, Joseph V.
Fonte: S. Karger AG Publicador: S. Karger AG
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.2%
The identification of acute kidney injury relies on tests like blood urea nitrogen and serum creatinine that were identified and incorporated into clinical practice several decades ago. This review summarizes clinical studies of newer biomarkers that may permit earlier and more accurate identification of acute kidney injury. The urine may contain sensitive and specific markers of kidney injury that are present due to either impaired tubular reabsorption and catabolism of filtered molecules or release of tubular cell proteins in response to ischemic or nephrotoxic injury. Many potential markers have been studied. Promising injury markers in the urine include N-acetyl-β-D-glucosaminidase, neutrophil gelatinase-associated lipocalin, kidney injury molecule-1, and interleukin-18. New biomarkers of kidney injury hold the promise of substantially improving the diagnostic approach to acute kidney injury. Adequately powered clinical studies of multiple biomarkers are needed to qualify the biomarkers before they can be fully adopted in clinical practice. Once adopted, more sensitive biomarkers of acute kidney injury hold the potential to transform the care of patients with renal disease.

Superior sensitivity of novel molecular imaging probe: simultaneously targeting two types of endothelial injury markers

Sun, Dawei; Nakao, Shintaro; Xie, Fang; Zandi, Souska; Schering, Alexander; Hafezi-Moghadam, Ali
Fonte: The Federation of American Societies for Experimental Biology Publicador: The Federation of American Societies for Experimental Biology
Tipo: Artigo de Revista Científica
Publicado em /05/2010 EN
Relevância na Pesquisa
46.07%
The need remains great for early diagnosis of diseases. The special structure of the eye provides a unique opportunity for noninvasive light-based imaging of fundus vasculature. To detect endothelial injury at the early and reversible stage of adhesion molecule up-regulation, we generated novel imaging agents that target two distinct types of endothelial molecules, a mediator of rolling, P-selectin, and one that mediates firm adhesion, ICAM-1. Interactions of these double-conjugated fluorescent microspheres (MSs) in retinal or choroidal microvasculature were visualized in live animals by scanning laser ophthalmoscopy. The new imaging agents showed significantly higher sensitivity for detection of endothelial injury than singly conjugated MSs (rPSGL-1- or α-ICAM-1-conjugated), both in terms of rolling (P<0.01) and firm adhesion (P<0.01). The rolling flux of α-ICAM-1-conjugated MSs did not differ in EIU animals, whereas double-conjugated MSs showed significantly higher rolling flux (P<0.01), revealing that ICAM-1 in vivo supports rolling, once MS interaction with the endothelium is initiated. Double-conjugated MSs specifically detected firmly adhering leukocytes (P<0.01), allowing in vivo quantification of immune response. Antiinflammatory treatment with dexamethasone led to reduced leukocyte accumulation (P<0.01) as well as MS interaction (P<0.01)...

Systemic Inflammatory Responses and Lung Injury following Hip Fracture Surgery Increases Susceptibility to Infection in Aged Rats

Zhang, Hao; Sun, Tiansheng; Liu, Zhi; Zhang, Jianzheng; Wang, Xiaowei; Liu, Jia
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.11%
Pulmonary infections frequently occur following hip fracture surgery in aged patients. However, the underlying reasons are not fully understood. The present study investigates the systemic inflammatory response and pulmonary conditions following hip fracture surgery as a means of identifying risk factors for lung infections using an aged rodent model. Aged, male Sprague-Dawley rats (8 animals per group) underwent a sham procedure or hip fracture plus femoral intramedullary pinning. Animals were sacrificed 1, 3, and 7 days after the injury. Markers of systemic inflammation and pulmonary injury were analyzed. Both sham-operated and injured/surgical group animals underwent intratracheal inoculation with Pseudomonas aeruginosa 1, 3, and 7 days after surgery. P. aeruginosa counts in blood and bronchoalveolar lavage (BAL) fluid and survival rates were recorded. Serum TNF-α, IL-6, IL-1β, and IL-10 levels and markers of pulmonary injury were significantly increased at 1 and 3 days following hip fracture and surgery. Animals challenged with P. aeruginosa at 1 and 3 days after injury had a significantly decreased survival rate and more P. aeruginosa recovered from blood and BAL fluid. This study shows that hip fracture and surgery in aged rats induced a systemic inflammatory response and lung injury associated with increased susceptibility to infection during the acute phase after injury and surgery.

Mechanistic biomarkers provide early and sensitive detection of acetaminophen-induced acute liver injury at first presentation to hospital

Antoine, Daniel J; Dear, James W; Lewis, Philip Starkey; Platt, Vivien; Coyle, Judy; Masson, Moyra; Thanacoody, Ruben H; Gray, Alasdair J; Webb, David J; Moggs, Jonathan G; Bateman, D Nicholas; Goldring, Christopher E; Park, B Kevin
Fonte: WILEY-VCH Verlag Publicador: WILEY-VCH Verlag
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.07%
Acetaminophen overdose is a common reason for hospital admission and the most frequent cause of hepatotoxicity in the Western world. Early identification would facilitate patient-individualized treatment strategies. We investigated the potential of a panel of novel biomarkers (with enhanced liver expression or linked to the mechanisms of toxicity) to identify patients with acetaminophen-induced acute liver injury (ALI) at first presentation to the hospital when currently used markers are within the normal range. In the first hospital presentation plasma sample from patients (n = 129), we measured microRNA-122 (miR-122; high liver specificity), high mobility group box-1 (HMGB1; marker of necrosis), full-length and caspase-cleaved keratin-18 (K18; markers of necrosis and apoptosis), and glutamate dehydrogenase (GLDH; marker of mitochondrial dysfunction). Receiver operator characteristic curve analysis and positive/negative predictive values were used to compare sensitivity to report liver injury versus alanine transaminase (ALT) and International Normalized Ratio (INR). In all patients, biomarkers at first presentation significantly correlated with peak ALT or INR. In patients presenting with normal ALT or INR, miR-122, HMGB1, and necrosis K18 identified the development of liver injury (n = 15) or not (n = 84) with a high degree of accuracy and significantly outperformed ALT...

Myocardial apoptosis and injury of donor hearts kept in completely beating status with normothermic blood perfusion for transplants

Kuang, Jun; Sun, Yanpeng; Wang, Wei; Ke, Han; Ye, Hong
Fonte: e-Century Publishing Corporation Publicador: e-Century Publishing Corporation
Tipo: Artigo de Revista Científica
Publicado em 15/04/2015 EN
Relevância na Pesquisa
36.11%
Objective: Normothermic blood perfusion is the developing trend of donor heart preservation. Theoretically, donor hearts preserved in a beating status may be the perfect method to reduce time-dependent ischemic injury, resuscitate marginal hearts expanding the donor pool and potentially improve the function of isolated hearts. In this study, to investigate the protective effect of normothermic blood perfusion, we maintained the donor hearts in a beating status and compared the changes of myocardial apoptosis and injury with standard hypothermic and static storage. Methods: Thirty rat hearts were preserved in static cold storage (Group A, n=10, stored in 4°C histidine-tryptophan-ketoglutarate solution), or in static normothermic blood perfusion (Group B, n=10, perfused with normothermic blood) or in beating status (Group C, n=10, perfused continuously with normothermic blood) for 9 hours. Myocardial injury markers including creatine kinase-MB (CK-MB) and cardiac troponin I (cTnI), myocardial metabolic rate related indicators including Methane Dicarboxylic Aldehyde (MDA) and Adenosine Triphosphate (ATP) were investigated before and after preservation. And also TUNEL staining and mRNA and protein expression of apoptosis markers such as Bax...

Warm Ischemic Injury Is Reflected in the Release of Injury Markers during Cold Preservation of the Human Liver

Bruinsma, Bote G.; Wu, Wilson; Ozer, Sinan; Farmer, Adam; Markmann, James F.; Yeh, Heidi; Uygun, Korkut
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
46.23%
Background: Liver transplantation plays a pivotal role in the treatment of patients with end-stage liver disease. Despite excellent outcomes, the field is strained by a severe shortage of viable liver grafts. To meet high demands, attempts are made to increase the use of suboptimal livers by both pretransplant recovery and assessment of donor livers. Here we aim to assess hepatic injury in the measurement of routine markers in the post-ischemic flush effluent of discarded human liver with a wide warm ischemic range. Methods: Six human livers discarded for transplantation with variable warm and cold ischemia times were flushed at the end of preservation. The liver grafts were flushed with NaCl or Lactated Ringer’s, 2 L through the portal vein and 1 L through the hepatic artery. The vena caval effluent was sampled and analyzed for biochemical markers of injury; lactate dehydrogenase (LDH), alanine transaminase (ALT), and alkaline phosphatase (ALP). Liver tissue biopsies were analyzed for ATP content and histologically (H&E) examined. Results: The duration of warm ischemia in the six livers correlated significantly to the concentration of LDH, ALT, and ALP in the effluent from the portal vein flush. No correlation was found with cold ischemia time. Tissue ATP content at the end of preservation correlated very strongly with the concentration of ALP in the arterial effluent (P<0.0007...

Nanoparticle Detection of Urinary Markers for Point-of-Care Diagnosis of Kidney Injury

Chung, Hyun Jung; Pellegrini, Kathryn L.; Chung, Jaehoon; Wanigasuriya, Kamani; Jayawardene, Innocent; Lee, Kyungheon; Lee, Hakho; Vaidya, Vishal S.; Weissleder, Ralph
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
36.18%
The high incidence of acute and chronic kidney injury due to various environmental factors such as heavy metals or chemicals has been a major problem in developing countries. However, the diagnosis of kidney injury in these areas can be more challenging due to the lack of highly sensitive and specific techniques that can be applied in point-of-care settings. To address this, we have developed a technique called ‘micro-urine nanoparticle detection (μUNPD)’, that allows the detection of trace amounts of molecular markers in urine. Specifically, this technique utilizes an automated on-chip assay followed by detection with a hand-held device for the read-out. Using the μUNPD technology, the kidney injury markers KIM-1 and Cystatin C were detected down to concentrations of 0.1 ng/ml and 20 ng/ml respectively, which meets the cut-off range required to identify patients with acute or chronic kidney injury. Thus, we show that the μUNPD technology enables point of care and non-invasive detection of kidney injury, and has potential for applications in diagnosing kidney injury with high sensitivity in resource-limited settings.

Comportamento da homocisteína e de marcadores de inflamação e de lesão miocárdica em crianças portadoras de cardiopatia congênita submetidas à cirurgia cardíaca

Ribeiro, Alessandra Carla de Almeida
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Tese de Doutorado
POR
Relevância na Pesquisa
36.27%
A cirurgia cardíaca com circulação extracorpórea (CEC) é considerada importante causa de resposta inflamatória sistêmica, com sérias implicações clínicas. O grau de inflamação e lesão miocárdica pode modificar o prognóstico dos pacientes. A homocisteinemia tem sido relacionada com a fisiopatologia de doenças cardiovasculares, podendo estar envolvida nos mecanismos do estresse oxidativo. O objetivo deste estudo foi determinar a concentração de homocisteína e outros marcadores de inflamação e lesão miocárdica em pacientes pediátricos portadores de cardiopatia congênita submetidos à cirurgia cardíaca e analisar a associação entre a homocisteína e variáveis clínicas e cirúrgicas neste grupo de pacientes. Foram estudados prospectivamente 29 pacientes. Os níveis séricos de homocisteína e marcadores de inflamação (números absolutos de leucócitos e bastonetes e proteína C reativa) e lesão miocárdica (creatinoquinases e troponina T) foram avaliados em três tempos de coleta: D0 - pré-operatório (controle), D1 - pós-operatório imediato (admissão UTI-PED) e D2 - 3º dia de pós-operatório. As médias de homocisteína encontradas foram, respectivamente, 7,530,51 M em D0, 9,430,66 M em D1 e 8...

Microparticles mediate hepatic ischemia-reperfusion injury and are the targets of Diannexin (ASP8597)

Teoh, Narci; Ajamieh, Hussam; Wong, Heng Jian; Croft, Kevin; Mori, Trevor; Allison, Anthony; Farrell, Geoffrey Charles
Fonte: PLOS ONE Publicador: PLOS ONE
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
36.14%
BACKGROUND & AIMS: Ischemia-reperfusion injury (IRI) can cause hepatic failure after liver surgery or transplantation. IRI causes oxidative stress, which injures sinusoidal endothelial cells (SECs), leading to recruitment and activation of Kupffer cells and platelets (by unknown processes) and microcirculatory impairment. We investigated whether injured SECs release microparticles (small fragments shed from outer leaf of the plasma membrane) with inflammatory effects that contribute to IRI pathogenesis. METHODS: C57BL6 mice underwent 60min of partial hepatic ischemia followed by 15min-24hrs of reperfusion. We collected blood and liver samples, isolated and measured circulating microparticles, and determined protein and lipid content. In mouse primary hepatocytes, we investigated features of microparticles and mechanisms of production. We analyzed the effects of an annexin V-homodimer (diannexin or ASP8597) on post-ischemia microparticle production and function. RESULTS: Circulating microparticles released 15-30min after ischemic reperfusion contained markers of SECs, platelets, natural killer T cells, and CD8+ cells; 4 hrs later, they contained markers of macrophages. Microparticles also contained F2- isoprostanes, markers of oxidative damage to membrane lipids. Injection of mice with TNF-alfa increased formation of microparticles...

Alterações cardiovasculares após maratona: marcadores de injúria e fadiga cardíaca; Cardiovascular changes after marathon: injury markers and cardiac fatigue

Sierra, Ana Paula Rennó
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 30/01/2015 PT
Relevância na Pesquisa
46.18%
O objetivo desse estudo foi verificar as repercussões clínicas e na capacidade cardiopulmonar, resultantes das alterações agudas morfofuncionais cardíacas e dos marcadores de injúria miocárdica após a realização de uma maratona, assim como a influência dos polimorfismos da ECA e BNP. Para tanto, 74 maratonistas, que participariam da XIX Maratona Internacional de São Paulo 2013 foram submetidos aos seguintes procedimentos: anamnese, exame físico, avaliação física, ecocardiograma, eletrocardiograma, bem como um teste cardiopulmonar. 24 horas antes da maratona, foi realizada uma coleta de sangue, em jejum. No terceiro momento, imediatamente antes da maratona, os atletas foram submetidos a medida de peso e bioimpedância elétrica a fim de caracterizar a quantidade de água corporal. Imediatamente após a maratona, os atletas foram submetidos a medida de peso, bioimpedância elétrica, coleta de sangue e ecocardiograma. 24 e 72 horas após a maratona, os atletas foram submetidos a coleta de sangue. No sétimo e último momento, entre três e quinze dias apos a maratona, novamente um teste cardiopulmonar. Os principais resultados foram: a) Houveram alterações estatisticamente significativas em todos os marcadores de injúria miocárdica no período após a maratona...

Temporal relationship of serum markers and tissue damage during acute intestinal ischemia/reperfusion

la Garza,Francisco Javier Guzman-de; Ibarra-Hernandez,Juan Manuel; Cordero-Perez,Paula; Villegas-Quintero,Pablo; Villarreal-Ovalle,Claudia Ivette; Torres-Gonzalez,Liliana; Oliva-Sosa,Norma Edith; Alarcon-Galvan,Gabriela; Fernandez-Garza,Nancy Esthela; Mun
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2013 EN
Relevância na Pesquisa
36.21%
OBJECTIVE: It is essential to identify a serological marker of injury in order to study the pathophysiology of intestinal ischemia reperfusion. In this work, we studied the evolution of several serological markers after intestinal ischemia reperfusion injury in rats. The markers of non-specific cell damage were aspartate aminotransferase, alanine aminotransaminase, and lactic dehydrogenase, the markers of inflammation were tumor necrosis factor alpha, interleukin-6, and interleukin-1 beta, and the markers of intestinal mucosal damage were intestinal fatty acid binding protein and D-lactate. We used Chiús classification to grade the histopathological damage. METHODS: We studied 35 Wistar rats divided into groups according to reperfusion time. The superior mesenteric artery was clamped for 30 minutes, and blood and biopsies were collected at 1, 3, 6, 12, 24, and 48 hours after reperfusion. We plotted the mean ± standard deviation and compared the baseline and maximum values for each marker using Student's t-test. RESULTS: The maximum values of interleukin-1 beta and lactic dehydrogenase were present before the maximal histopathological damage. The maximum tumor necrosis factor alpha and D-lactate expressions coincided with histopathological damage. Alanine aminotransaminase and aspartate aminotransferase had a maximum expression level that increased following the histopathological damage. The maximum expressions of interluken-6 and intestinal fatty acid binding protein were not significantly different from the Sham treated group. CONCLUSION: For the evaluation of injury secondary to acute intestinal ischemia reperfusion with a 30 minute ischemia period...

A role for atorvastatin and insulin combination in protecting from liver injury in a model of type 2 diabetes with hyperlipidemia

Matafome, P.; Nunes, E.; Louro, T.; Amaral, C.; Crisóstomo, J.; Rodrigues, L.; Moedas, A. R.; Monteiro, P.; Cipriano, A.; Seiça, R.
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
ENG
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Non-alcoholic fatty liver disease (NAFLD) is a major complication linked with the metabolic syndrome associated with dyslipidemia, inflammation, and oxidative stress. Impact of type 2 diabetes with hyperlipidemia in NAFLD has to be established, as well as the utility of commonly prescribed anti-diabetic and lipid-lowering agents in improving liver injury markers. Genetic type 2 diabetic Goto–Kakizaki rats were fed with a high-fat diet to test hepatic effects of type 2 diabetes with hyperlipidemia and the effect of atorvastatin and insulin, individually and in combination, in systemic and hepatic inflammatory and oxidative stress markers. High-fat diet aggravated fasting glycemia, systemic and liver lipids, and inflammatory and oxidative stress markers. Individual treatments improved glycemic and lipid profiles, but failed to improve inflammatory markers, whereas insulin was able to reduce liver oxidative stress parameters. Combination of insulin and atorvastatin further improved glycemic and lipid profiles and decreased circulating C-reactive protein levels and liver inflammatory and oxidative stress markers. Insulin and atorvastatin combination leads to better glycaemic and lipid profiles and to better protection against liver inflammation and oxidative stress...