Shear stress regulates cystathionine γ lyase expression to preserve endothelial redox balance and reduce membrane lipid peroxidation

Publication date: Available online 13 November 2019Source: Redox BiologyAuthor(s): Sofia-Iris Bibli, Jiong Hu, Matthias S. Leisegang, Janina Wittig, Sven Zukunft, Andrea Kapasakalidi, Beate Fisstlhaller, Diamantis Tsilimigras, Georgios Zografos, Konstantinos Filis, Ralf P. Brandes, Andreas Papapetropoulos, Fragiska Sigala, Ingrid FlemingAbstractCystathionine γ lyase (CSE) is the major source of hydrogen sulfide-derived species (H2Sn) in endothelial cells and plays an important role in protecting against atherosclerosis. Here we investigated the molecular mechanisms underlying the regulation of CSE expression in endothelial cells by fluid shear stress/flow. Fluid shear stress decreased CSE expression in human and murine endothelial cells and was negatively correlated with the transcription factor Krüppel-like factor (KLF) 2. CSE was identified as a direct target of the KLF2-regulated microRNA, miR-27b and high expression of CSE in native human plaque-derived endothelial cells, was also inversely correlated with KLF2 and miR-27b levels. One consequence of decreased CSE expression was the loss of Prx6 sulfhydration (on Cys47), which resulted in Prx6 hyperoxidation, decamerization and inhibition, as well as a concomitant increase in endothelial cell reactive oxygen species and lipid membrane peroxidation. H2Sn supplementation in vitro was able to reverse the redox state of Prx6. Statin therapy, which is known to activate KLF2, also decreased CSE expression but increase...
Source: Redox Biology - Category: Biology Source Type: research

Related Links:

CONCLUSIONS: The presence of one or more prognostic factors as well as the various risk prediction models can guide selection of ACS patient subgroups for which a prophylactic CEA should or should not be offered. Decisions to offer prophylactic CEA should weigh in factors like surgeon's experience and hospital expertise/volume. Asymptomatic patients not expected to live long enough to benefit from the procedure should not be considered for CEA, but should be offered best medical treatment. PMID: 31814375 [PubMed - as supplied by publisher]
Source: International Angiology - Category: Cardiology Tags: Int Angiol Source Type: research
ConclusionCompared with placebo or any other comparator, PCSK9-mAb treatment was not associated with the adverse event of diabetes. However, evolocumab and alirocumab show high risk of incident diabetes when there is no interference from unbalanced use of statins. The imbalance in background lipid modifying therapy or different comparators used in the control arms of the studies might have masked the effect of PCSK9-mAb therapy on diabetes.
Source: American Journal of Cardiovascular Drugs - Category: Cardiology Source Type: research
Have rates of statin use for secondary prevention improved over the last decade? Do disparities still exist by gender or racial/ethnic groups?Journal of the American Board of Family Medicine
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Family Medicine/Primary Care Journal Article Source Type: news
MHRA aware of issue and advises patients to continue to taking their diabetes medicine Related items fromOnMedica People on statins at greater risk of skin infections and diabetes Raised risk of MI and mortality when starting sulfonylurea Use of DPP-4 inhibitors associated with increased risk of IBD Vitamin D does not reduce kidney damage in type 2 diabetes Use pioglitazone only in selected patients, says EMA guidance
Source: OnMedica Latest News - Category: UK Health Source Type: news
In this study, we explored the anti-tumour mechanisms of a lipophilic statin, lovastatin, in MCF-7 breast cancer cells. Lovastatin inhibited cell proliferation and induced cell apoptosis. Lovastatin caused p21 elevation while reduced cyclin D1 and survivin levels. Lovastatin also increased p53 phosphorylation, acetylation and its reporter activities. Results from chromatin immunoprecipitation analysis showed that p53 binding to the survivin promoter region was increased, while Sp1 binding to the region was decreased, in MCF-7 cells after lovastatin exposure. These actions were associated with liver kinase B1 (LKB1), AMP-ac...
Source: J Cell Mol Med - Category: Molecular Biology Authors: Tags: J Cell Mol Med Source Type: research
This study suggests that for most, managing CAD with medications alone (the conservative approach) is as safe and effective as the more invasive strategy of cardiac catheterization and opening of the blocked artery. Findings of the ISCHEMIA trial ISCHEMIA followed over 5,000 patients with significant narrowing in one or more coronary arteries. Half of the patients were randomly selected to receive conservative treatment with optimal medical therapy (OMT) and lifestyle changes to treat risk factors such as high blood pressure and high cholesterol. The other half were given OMT and also sent for cardiac catheterization (thre...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Health Source Type: blogs
(Oxford University Press USA) A new paper in Family Practice, published by Oxford University Press, found that the widespread use of statins and cancer screening technology may have altered the benefits of aspirin use. Researchers concluded that aspirin no longer provides a net benefit as primary prevention for cardiovascular disease and cancer.
Source: EurekAlert! - Medicine and Health - Category: International Medicine & Public Health Source Type: news
The impact of body mass index (BMI) on cardiovascular outcomes among patients receiving intensive low-density lipoprotein cholesterol (LDL-C) lowering therapy is uncertain. We performed meta-analysis of 29 randomized controlled trials using PubMed, Embase and CENTRAL through April 2019. Therapies were grouped as more intensive LDL-C lowering therapy (statins, ezetimibe  + statin or PCSK9 inhibitors) and less intensive LDL-C lowering therapy (less potent active control or placebo). Random effects meta-regressions and meta-analyses were performed to evaluate association of BMI with cardiovascular endpoints.
Source: The American Journal of Cardiology - Category: Cardiology Authors: Source Type: research
The objective of the work was to develop the marine-derived polysaccharides attenuating 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR), and as prospective natural anti-dyslipidemic leads. Physical and chromatographic purification methods were used to isolate the polygalactofucan from the marine macroalgaSargassum wightii andβ-(2-deoxy)-amino-substituted glucopyrananan from a marine crustacean. Glycosidic linkage analysis by the process of methylation was used for structural elucidation of the polygalactofucan, and the methylated and partially methylated alditol acetates were characterized using extensive spectroscop...
Source: Medicinal Chemistry Research - Category: Chemistry Source Type: research
Publication date: Available online 7 December 2019Source: Revista Española de Cardiología (English Edition)Author(s): Carlos Escobar, Manuel Anguita, Vicente Arrarte, Vivencio Barrios, Ángel Cequier, Juan Cosín-Sales, Isabel Egocheaga, Esteban López de Sa, Luis Masana, Vicente Pallarés, Leopoldo Pérez de Isla, Xavier Pintó, José Ramón González Juanatey, José Luis ZamoranoAbstractThe current control of low-density lipoprotein cholesterol among patients with atherosclerotic cardiovascular disease is very low and this is associated with an inc...
Source: Revista Espanola de Cardiologia - Category: Cardiology Source Type: research
More News: Biology | Cholesterol | Molecular Biology | Statin Therapy