571 research outputs found

    TIMI frame count and adverse events in women with no obstructive coronary disease: A pilot study from the NHLBI-sponsored Women's Ischemia Syndrome Evaluation (WISE)

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    Background: TIMI frame count (TFC) predicts outcomes in patients with obstructive coronary artery disease (CAD); it remains unclear whether TFC predicts outcomes in patients without obstructive CAD. Methods: TFC was determined in a sample of women with no obstructive CAD enrolled in the Women's Ischemia Syndrome Evaluation (WISE) study. Because TFC is known to be higher in the left anterior descending artery (LAD), TFC determined in the LAD was divided by 1.7 to provide a corrected TFC (cTFC). Results: A total of 298 women, with angiograms suitable for TFC analysis and long-term (6-10 year) follow up data, were included in this sub-study. Their age was 55±11 years, most were white (86%), half had a history of smoking, and half had a history of hypertension. Higher resting cTFC was associated with a higher rate of hospitalization for angina (34% in women with a cTFC >35, 15% in women with a cTFC ≤35, P<0.001). cTFC provided independent prediction of hospitalization for angina after adjusting for many baseline characteristics. In this cohort, resting cTFC was not predictive of major events (myocardial infarction, heart failure, stroke, or all-cause death), cardiovascular events, all-cause mortality, or cardiovascular mortality. Conclusions: In women with signs and symptoms of ischemia but no obstructive CAD, resting cTFC provides independent prediction of hospitalization for angina. Larger studies are required to determine if resting TFC is predictive of major events in patients without obstructive coronary artery disease. © 2014 Petersen et al

    Identification of bioactive compounds with anti-inflammatory potential in the methanolic fruit extract of Areca catechu L. (Palmaceae)

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    The present study was aimed to investigate the anti-inflammatory effect of methanolic fruit extract of Areca catechu L. (Arecanut) on lipopolysaccharide (LPS) stimulated RAW 264.7 cells and identification of bioactive components by liquid chromatography-mass spectrometry (LC-MS) analysis. The Arecanut extract showed maximum scavenging potential against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical with half maximal scavenging concentration value of 0.264 ± 0.073 μg/mL compared to BHA with 0.553 ± 0.082 μg/mL. The anti-inflammatory effect was investigated based on interleukin 6 (IL-6) production in LPS stimulated RAW 264.7 cells. The methanol extract of Arecanut showed a significantly higher inhibitory effect on IL-6 production, and it was further analyzed for the characterization of active compounds by LC-MS. LC-MS revealed the presence of 10 active phytoconstituents, including alkaloids, flavonoids, terpenoids, and glycoside. From the results, it is evident that methanol extract of Arecanut has an anti-inflammatory property and contains various phytochemicals and is recommended as a fruit of pharmaceutical importance

    Identification of bioactive compounds with anti-inflammatory potential in the methanolic fruit extract of Areca catechu L. (Palmaceae)

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    464-471The present study was aimed to investigate the anti-inflammatory effect of methanolic fruit extract of Areca catechu L. (Arecanut) on lipopolysaccharide (LPS) stimulated RAW 264.7 cells and identification of bioactive components by liquid chromatography-mass spectrometry (LC-MS) analysis. The Arecanut extract showed maximum scavenging potential against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical with half maximal scavenging concentration value of 0.264 ± 0.073 μg/mL compared to BHA with 0.553 ± 0.082 μg/mL. The anti-inflammatory effect was investigated based on interleukin 6 (IL-6) production in LPS stimulated RAW 264.7 cells. The methanol extract of Arecanut showed a significantly higher inhibitory effect on IL-6 production, and it was further analyzed for the characterization of active compounds by LC-MS. LC-MS revealed the presence of 10 active phytoconstituents, including alkaloids, flavonoids, terpenoids, and glycoside. From the results, it is evident that methanol extract of Arecanut has an anti-inflammatory property and contains various phytochemicals and is recommended as a fruit of pharmaceutical importance

    Measuring Impact of Air and Agricultural Soil Pollution on Social Development in Saudi Arabia

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    This research aimed to measure the impact of air and agricultural soil pollution on social development in Saudi Arabia from the period 1995–2019 by using social development indicators, concentrating on the percentages of expenditure on education and health, and the Human Development Index. In addition, this study uses multiple regressions in estimating the model to study the impact of air pollution and agricultural soil on social development. Results of the study showed that a 10% change in the number of chemical fertilizers and pesticides used in Saudi agriculture leads to a change in the total number of inpatients by 0.7% and 0.5%, respectively. It was also found that an increased percentage of health expenditure to total government spending by 10% leads to a decrease in the total number of patients in the hospital by 1.8%. An increase in air pollution, expressed as a 10% increase in CO2 emissions, increases the total number of hospitalized patients by 11.1%.  The increasing total number of patients by 10% leads to a decrease in the total productivity of the worker, as an indicator of 1.8%. Furthermore, a change of 10% in the ratio of education expenditure to total government expenditure leads to a change in the same direction of the Human Development Index by 9.6%. In light of these results, it can be recommended that the country need to reduce air pollution by expanding the use of natural gas in the industrial and transportation sectors, in addition to reducing the use of nitrogenous fertilizers and pesticides in Saudi agriculture through the expansion of clean farming and good agricultural practices

    Hemoglobin level is an independent predictor for adverse cardiovascular outcomes in women undergoing evaluation for chest pain Results from the National Heart, Lung, and Blood Institute women's ischemia syndrome evaluation study

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    AbstractObjectivesThis study was designed to investigate the relationship between hemoglobin level (Hgb) and adverse cardiovascular outcomes in women with suspected ischemia.BackgroundLow Hgb levels correlate with increased cardiovascular morbidity and mortality in patients presenting with acute myocardial infarction (MI) or congestive heart failure (CHF). However, the prognostic significance of Hgb in women with suspected ischemia is unclear.MethodsAs part of the National Heart, Lung, and Blood Institute (NHLBI)-sponsored Women's Ischemia Syndrome Evaluation (WISE), we prospectively studied 936 women referred for coronary angiography to evaluate suspected ischemia. We compared Hgb levels with cardiovascular risk factors, core lab interpreted angiograms, inflammatory markers, and adverse cardiovascular outcomes.ResultsOf women enrolled, 864 (mean age 58.4 ±11.6 years) had complete Hgb, angiogram, and follow-up (mean 3.3 ± 1.7 years) data. The mean Hgb was 12.9 g/dl (range 7.7 to 16.4 g/dl) and 184 women (21%) were anemic (Hgb <12 g/dl). Anemic women had higher creatinine and were more likely to be nonwhite and have a history of diabetes, hypertension, and CHF (p < 0.05). However, we found no difference in EF or severity of coronary artery disease. Anemic women had a higher risk of death from any cause (10.3% vs. 5.4%; p = 0.02) and total adverse outcomes (26% vs. 16%, p < 0.01). In a multivariable model, decreasing Hgb was associated with significantly higher risk of adverse outcomes (hazard ratio = 1.20, p = 0.002). Also, anemic women had shorter survival time free of adverse outcome (p < 0.001).ConclusionsOur findings extend previous reports, linking lower hemoglobin levels with higher risk for adverse cardiovascular outcomes, to women evaluated for suspected ischemia in the absence of acute MI or CHF

    Cyclic vomiting syndrome: Pathophysiology, comorbidities, and future research directions

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    Cyclic vomiting syndrome (CVS) is characterized by severe episodic emesis in adults and children. Cannabinoid hyperemesis syndrome is an increasingly recognized CVS‐like illness that has been associated with chronic cannabis use. There are significant gaps in our understanding of the pathophysiology, clinical features, comorbidities, and effective management options of CVS. Recommendations for treating CVS are based on limited clinical data, as no placebo‐controlled, randomized trials have yet been conducted. Diseases associated with CVS, including migraine, mitochondrial disorders, autonomic dysfunction, and psychiatric comorbidities, provide clues about pathophysiologic mechanisms and suggest potential therapies. We review our current understanding of CVS and propose future research directions with the aim of developing effective therapy. Establishing a multicenter, standardized registry of CVS patients could drive research on multiple fronts including developing CVS‐specific outcome measures to broaden our understanding of clinical profiles, to serve as treatment end points in clinical trials, and to provide a platform for patient recruitment for randomized clinical trials. Such a robust database would also facilitate conduct of research that aims to determine the underlying pathophysiological mechanisms and genetic basis for CVS, as well as identifying potential biomarkers for the disorder. Soliciting government and industry support is crucial to establishing the necessary infrastructure and achieving these goals. Patient advocacy groups such as the Cyclic Vomiting Syndrome Association (CVSA), which partner with clinicians and researchers to disseminate new information, to promote ongoing interactions between patients, their families, clinicians, investigators, to support ongoing CVS research and education, must be an integral part of this endeavor.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/149751/1/nmo13607.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/149751/2/nmo13607_am.pd

    A bioreactor for in-cell protein NMR

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    The inside of the cell is a complex environment that is difficult to simulate when studying proteins and other molecules in vitro. We have developed a device and system that provides a controlled environment for Nuclear Magnetic Resonance (NMR) experiments involving living cells. Our device comprises two main parts, an NMR detection region and a circulation system. The flow of medium from the bottom of the device pushes alginate encapsulated cells into the circulation chamber. In the chamber, the exchange of oxygen and nutrients occurs between the media and the encapsulated cells. When the media flow is stopped, the encapsulated cells fall back into the NMR detection region, and spectra can be acquired. We have utilized the bioreactor to study the expression of the natively disordered protein α-synuclein, inside Escherichia coli cells
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