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Epigenetics atherosclerosis

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https://www.readbyqxmd.com/read/28193703/methylation-in-the-matrix-metalloproteinase-2-gene-is-associated-with-cerebral-ischemic-stroke
#1
Hsiu-Fen Lin, Edward Hsi, Ling-Chun Huang, Yi-Chu Liao, Suh-Hang H Juo, Ruey-Tay Lin
Matrix metalloproteinase-2 (MMP-2) is involved in the pathophysiology of stroke. Previous studies have shown that MMP-2 activity is increased in stroke; however, evidence of epigenetic regulation of the MMP-2 in stroke is still limited. We examined methylation of the MMP-2 promoter in patients with ischemic stroke. This study included 298 patients with ischemic stroke and 258 age-matched and sex-matched controls. MMP-2 promoter methylation levels were measured by pyrosequencing at eight potential cytosine-guanine (CpG) sites...
February 13, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28189002/abdominal-aortic-aneurysm-an-independent-disease-to-atherosclerosis
#2
REVIEW
Bradley J Toghill, Athanasios Saratzis, Matthew J Bown
Atherosclerosis and abdominal aortic aneurysms (AAAs) are multifactorial and polygenic diseases with known environmental and genetic risk factors that contribute toward disease development. Atherosclerosis represents an important independent risk factor for AAA, as people with AAA often have atherosclerosis. Studies have shown that comorbidity is usually between ~25% and 55%, but it is still not fully known whether this association is causal or a result of common shared risk profiles. Most recent epidemiological, clinical, and biological evidence suggests that the two pathologies are more distinct than traditionally thought...
January 29, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28188730/involvement-of-histone-methylation-in-macrophage-apoptosis-and-unstable-plaque-formation-in-methionine-induced-hyperhomocysteinemic-apoe-mice
#3
Guangzhi Cong, Ru Yan, Hui Huang, Kai Wang, Ning Yan, Ping Jin, Na Zhang, Jianjun Hou, Dapeng Chen, Shaobin Jia
AIMS: Hyperhomocysteinemia (Hhcy) is an independent risk factor of atherosclerosis and promotes unstable plaque formation. Epigenetic mechanisms play an important role in the pathogenesis of atherosclerosis induced by Hhcy. However, the exact mechanism is still undefined. Lesional apoptotic cells and necrotic core formation contribute greatly to the progression of plaque. The present study sought to determine whether modification of histone methylation is involved in macrophage apoptosis and unstable plaque formation in the condition of Hhcy...
February 7, 2017: Life Sciences
https://www.readbyqxmd.com/read/28183874/novel-insights-into-dna-methylation-and-its-critical-implications-in-diabetic-vascular-complications
#4
Jia Zheng, Jing Cheng, Qian Zhang, Xinhua Xiao
Recent epidemiological and clinical studies have shown that type 2 diabetic patients can develop diabetic vascular complications even after intensive glycemic control. It has been suggested that this phenomenon could be explained by the hypothesis of "metabolic memory". The underlying mechanisms between these enduring effects and the prior hyperglycemic state are still not well understood. Preliminary studies demonstrate that hyperglycemia can regulate gene expression by epigenetic modifications, such as DNA methylation, which can persistently exist even after glucose normalization...
February 9, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28125025/inhaled-pollutants-the-molecular-scene-behind-respiratory-and-systemic-diseases-associated-with-ultrafine-particulate-matter
#5
REVIEW
Hussein Traboulsi, Necola Guerrina, Matthew Iu, Dusica Maysinger, Parisa Ariya, Carolyn J Baglole
Air pollution of anthropogenic origin is largely from the combustion of biomass (e.g., wood), fossil fuels (e.g., cars and trucks), incinerators, landfills, agricultural activities and tobacco smoke. Air pollution is a complex mixture that varies in space and time, and contains hundreds of compounds including volatile organic compounds (e.g., benzene), metals, sulphur and nitrogen oxides, ozone and particulate matter (PM). PM0.1 (ultrafine particles (UFP)), those particles with a diameter less than 100 nm (includes nanoparticles (NP)) are considered especially dangerous to human health and may contribute significantly to the development of numerous respiratory and cardiovascular diseases such as chronic obstructive pulmonary disease (COPD) and atherosclerosis...
January 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28116311/genetic-and-epigenetic-regulation-of-aortic-aneurysms
#6
REVIEW
Ha Won Kim, Brian K Stansfield
Aneurysms are characterized by structural deterioration of the vascular wall leading to progressive dilatation and, potentially, rupture of the aorta. While aortic aneurysms often remain clinically silent, the morbidity and mortality associated with aneurysm expansion and rupture are considerable. Over 13,000 deaths annually in the United States are attributable to aortic aneurysm rupture with less than 1 in 3 persons with aortic aneurysm rupture surviving to surgical intervention. Environmental and epidemiologic risk factors including smoking, male gender, hypertension, older age, dyslipidemia, atherosclerosis, and family history are highly associated with abdominal aortic aneurysms, while heritable genetic mutations are commonly associated with aneurysms of the thoracic aorta...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28111052/activated-p300-acetyltransferase-activity-modulates-aortic-valvular-calcification-with-osteogenic-transdifferentiation-and-downregulation-of-klotho
#7
Shao-Jung Li, Yu-Hsun Kao, Cheng-Chih Chung, Wei-Yu Chen, Wan-Li Cheng, Yi-Jen Chen
BACKGROUND: The calcific aortic valve (AV) disease is a common disease with the unclear mechanism, and optimal pharmacological treatment remains unavailable. Epigenetic modulation by histone acetyltransferase (HAT) plays a critical role in osteogenic transdifferentiation and atherosclerosis. The purposes of this study were to investigate whether HAT contributes to the pathophysiology of AV calcification and assess the therapeutic potential of HAT inhibition. METHODS: Porcine valvular interstitial cells (VICs) were treated with osteogenic medium (10ng/mL of tumor necrosis factor-α and 4mmol/L of high phosphate) for 7days...
January 5, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28104796/clonal-hematopoiesis-associated-with-tet2-deficiency-accelerates-atherosclerosis-development-in-mice
#8
José J Fuster, Susan MacLauchlan, María A Zuriaga, Maya N Polackal, Allison C Ostriker, Raja Chakraborty, Chia-Ling Wu, Soichi Sano, Sujatha Muralidharan, Cristina Rius, Jacqueline Vuong, Sophia Jacob, Varsha Muralidhar, Avril A B Robertson, Matthew A Cooper, Vicente Andrés, Karen K Hirschi, Kathleen A Martin, Kenneth Walsh
Human aging is associated with an increased frequency of somatic mutations in hematopoietic cells. Several of these recurrent mutations, including those in the gene encoding the epigenetic modifier enzyme TET2, promote expansion of the mutant blood cells. This "clonal hematopoiesis" correlates with an increased risk of atherosclerotic cardiovascular disease. Here we studied the effects of the expansion of Tet2-mutant cells in atherosclerosis-prone, low-density lipoprotein receptor-deficient (Ldlr-/-) mice. We found that partial bone marrow reconstitution with Tet2-deficient cells was sufficient for their clonal expansion and led to a marked increase in atherosclerotic plaque size...
January 19, 2017: Science
https://www.readbyqxmd.com/read/28062506/wnt-signaling-pathway-inhibitor-sclerostin-inhibits-angiotensin-ii-induced-aortic-aneurysm-and-atherosclerosis
#9
Smriti Murali Krishna, Sai-Wang Seto, Roby J Jose, Jiaze Li, Susan K Morton, Erik Biros, Yutang Wang, Vianne Nsengiyumva, Jan H N Lindeman, Gabriela G Loots, Catherine M Rush, Jeffrey M Craig, Jonathan Golledge
OBJECTIVE: Sclerostin (SOST) has been identified as an important regulator of bone formation; however, it has not been previously implicated in arterial disease. The aim of this study was to assess the role of SOST in aortic aneurysm (AA) and atherosclerosis using human samples, a mouse model, and in vitro investigations. APPROACH AND RESULTS: SOST protein was downregulated in human and mouse AA samples compared with controls. Transgenic introduction of human SOST in apolipoprotein E-deficient (ApoE(-/-)) mice (SOST(Tg)...
December 22, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28030845/withdrawn-could-some-epigenetic-modifications-hold-the-key-to-opposing-the-metabolic-syndrome
#10
REVIEW
Giovanni Tarantino, Matteo Nicola Di Minno, Carmine Finelli
Ahead of Print article withdrawn by publisher.
December 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/28029182/nedd4-deficiency-in-vascular-smooth-muscle-promotes-vascular-calcification-by-stabilizing-psmad1
#11
Ji-Hyun Lee, Seon-Ae Jeon, Byung-Gyu Kim, Michiko Takeda, Jae-Jin Cho, Dong-Ik Kim, Hiroshi Kawabe, Je-Yoel Cho
The nonosseous calcification process such as atherosclerosis is one of the major complications in several types of metabolic diseases. In previous study, we uncovered that aberrant activity of TGF-β signaling pathway could contribute the vascular smooth muscle cells (VSMCs) calcification process. Also, we identified NEDD4 E3 ligase as a key suppressor of BMP/Smad pathway via a polyubiquitination dependent selective degradation of C-terminal phosphorylated Smad1 (pSmad1) activated by TGF-β⋅ Here, we further validated and confirmed the role of Nedd4 in in vivo vascular calcification progression...
December 28, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27932351/telomerase-reverse-transcriptase-deficiency-prevents-neointima-formation-through-chromatin-silencing-of-e2f1-target-genes
#12
Elizabeth B Endorf, Hua Qing, Jun Aono, Naoto Terami, Geneviève Doyon, Eric Hyzny, Karrie L Jones, Hannes M Findeisen, Dennis Bruemmer
OBJECTIVE: Aberrant proliferation of smooth muscle cells (SMC) in response to injury induces pathological vascular remodeling during atherosclerosis and neointima formation. Telomerase is rate limiting for tissue renewal and cell replication; however, the physiological role of telomerase in vascular diseases remains to be determined. The goal of the present study was to determine whether telomerase reverse transcriptase (TERT) affects proliferative vascular remodeling and to define the molecular mechanism by which TERT supports SMC proliferation...
December 8, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27904046/cocl2-decreases-ec-sod-expression-through-histone-deacetylation-in-cos7-cells
#13
Shuhei Hattori, Tetsuro Kamiya, Hirokazu Hara, Masayuki Ninomiya, Mamoru Koketsu, Tetsuo Adachi
Extracellular-superoxide dismutase (EC-SOD), one of the SOD isozymes, is negatively regulated under hypoxic conditions, and decreases in its expression may exacerbate vascular diseases. Moreover, epigenetics, such as DNA methylation and histone modifications, are known to play a critical role in the progression of cancer, type 2 diabetes, and atherosclerosis. We previously investigated the involvement of reactive oxygen species (ROS) and p38 mitogen-activated protein kinase (MAPK) in decreases in EC-SOD expression in hypoxic COS7 cells; however, the role of epigenetics in this process currently remains unknown...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27903268/long-term-outdoor-air-pollution-and-dna-methylation-in-circulating-monocytes-results-from-the-multi-ethnic-study-of-atherosclerosis-mesa
#14
Gloria C Chi, Yongmei Liu, James W MacDonald, R Graham Barr, Kathleen M Donohue, Mark D Hensley, Lifang Hou, Charles E McCall, Lindsay M Reynolds, David S Siscovick, Joel D Kaufman
BACKGROUND: DNA methylation may mediate effects of air pollution on cardiovascular disease. The association between long-term air pollution exposure and DNA methylation in monocytes, which are central to atherosclerosis, has not been studied. We investigated the association between long-term ambient air pollution exposure and DNA methylation (candidate sites and global) in monocytes of adults (aged ≥55). METHODS: One-year average ambient fine particulate matter (PM2...
December 1, 2016: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/27869795/cd68-macrosialin-not-just-a-histochemical-marker
#15
Dimitry A Chistiakov, Murry C Killingsworth, Veronika A Myasoedova, Alexander N Orekhov, Yuri V Bobryshev
CD68 is a heavily glycosylated glycoprotein that is highly expressed in macrophages and other mononuclear phagocytes. Traditionally, CD68 is exploited as a valuable cytochemical marker to immunostain monocyte/macrophages in the histochemical analysis of inflamed tissues, tumor tissues, and other immunohistopathological applications. CD68 alone or in combination with other cell markers of tumor-associated macrophages showed a good predictive value as a prognostic marker of survival in cancer patients. Lowression of CD68 was found in the lymphoid cells, non-hematopoietic cells (fibroblasts, endothelial cells, etc), and tumor cells...
November 21, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/27765534/diabetic-nephropathy-and-endothelial-dysfunction-current-and-future-therapies-and-emerging-of-vascular-imaging-for-preclinical-renal-kinetic-study
#16
REVIEW
Wilson Kc Leung, L Gao, Parco M Siu, Christopher Wk Lai
An explosion in global epidemic of type 2 diabetes mellitus poses major rise in cases with vascular endothelial dysfunction ranging from micro- (retinopathy, nephropathy and neuropathy) to macro-vascular (atherosclerosis and cardiomyopathy) conditions. Functional destruction of endothelium is regarded as an early event that lays the groundwork for the development of renal microangiopathy and subsequent clinical manifestation of nephropathic symptoms. Recent research has shed some light on the molecular mechanisms of type 2 diabetes-associated comorbidity of endothelial dysfunction and nephropathy...
December 1, 2016: Life Sciences
https://www.readbyqxmd.com/read/27764724/innate-immune-cell-activation-and-epigenetic-remodeling-in-symptomatic-and-asymptomatic-atherosclerosis-in-humans-in%C3%A2-vivo
#17
Siroon Bekkering, Inge van den Munckhof, Tim Nielen, Evert Lamfers, Charles Dinarello, Joost Rutten, Jacqueline de Graaf, Leo A B Joosten, Mihai G Netea, Marc E R Gomes, Niels P Riksen
BACKGROUND AND AIMS: We have recently reported that monocytes can undergo functional and transcriptional reprogramming towards a long-term pro-inflammatory phenotype after brief in vitro exposure to atherogenic stimuli such as oxidized LDL. This process is termed 'trained immunity', and is mediated by epigenetic remodeling and a metabolic switch towards increased aerobic glycolysis. We hypothesize that trained immunity contributes to atherogenesis. Therefore, we investigated the inflammatory phenotype and epigenetic remodeling of monocytes from patients with and without established atherosclerosis...
October 12, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27755984/mirna-27b-modulates-endothelial-cell-angiogenesis-by-directly-targeting-naa15-in-atherogenesis
#18
Li Qun, Xi Wenda, Sun Weihong, Ma Jianyang, Cai Wei, Lou Fangzhou, Xu Zhenyao, Gao Pingjin
BACKGROUND AND AIMS: The CCL20/CCR6 axis has been shown to play a vital role in the pathogenesis of atherosclerosis (AS). However, the regulatory mechanism remains unclear. Here, we studied the miRNA-mediated epigenetic regulation of the CCL20/CCR6 axis in atherogenesis. METHODS: CCR6(+/+)ApoE-/- and CCR6(-/-)ApoE-/- mice were fed a high-fat diet for 24 weeks. Plaque size was evaluated via ultrasound biomicroscope and hematoxylin and eosin. Protein expression were measured by Western blotting or immunofluorescence/immunohistochemistry or ELISA, and gene mRNA levels were detected by RT-PCR...
October 8, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27754176/sy-15-2-endothelial-epigenetics-and-its-role-in-mediating-biomechanical-stress-of-hypertension
#19
Peter F Davies, Elisabetta Manduchi, Christian J Stoeckert, Yi-Zhou Jiang
Hemodynamics creates a constantly changing physical and chemical environment to which the arterial endothelium is exquisitely sensitive. Biomechanical stresses are intrinsic to blood flow characteristics and blood pressure and therefore are important considerations in hypertension. Near branching anatomical sites in arteries, blood flow separates from the main flow to undergo complex multi-directional characteristics for a part of each cardiac cycle (collectively referred to as disturbed flow). Atherosclerosis and aneurysmal pathology develop preferentially at disturbed flow locations, particularly when an additional cardiovascular risk factor such as hypercholesterolemia or high blood pressure are present...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27726072/genetic-research-and-women-s-heart-disease-a-primer
#20
Maryam Kavousi, Lawrence F Bielak, Patricia A Peyser
PURPOSE OF REVIEW: This review provides a brief synopsis of sexual dimorphism in atherosclerosis with an emphasis on genetic studies aimed to better understand the atherosclerotic process and clinical outcomes in women. Such studies are warranted because development of atherosclerosis, impact of several traditional risk factors, and burden of coronary heart disease (CHD) differ between women and men. RECENT FINDINGS: While most candidate gene studies pool women and men and adjust for sex, some sex-specific studies provide evidence of association between candidate genes and prevalent and incident CHD in women...
November 2016: Current Atherosclerosis Reports
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