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https://www.readbyqxmd.com/read/28208754/gypenoside-xvii-prevents-atherosclerosis-by-attenuating-endothelial-apoptosis-and-oxidative-stress-insight-into-the-er%C3%AE-mediated-pi3k-akt-pathway
#1
Ke Yang, Haijing Zhang, Yun Luo, Jingyi Zhang, Min Wang, Ping Liao, Li Cao, Peng Guo, Guibo Sun, Xiaobo Sun
Phytoestrogens are estrogen-like compounds of plant origin. The pharmacological activities of phytoestrogens are predominantly due to their antioxidant, anti-inflammatory and lipid-lowering properties, which are mediated via the estrogen receptors (ERs): estrogen receptor alpha (ERα) and estrogen receptor beta (ERβ) and possibly G protein-coupled estrogen receptor 1 (GPER). Gypenoside XVII (GP-17) is a phytoestrogen that is widely used to prevent cardiovascular disease, including atherosclerosis, but the mechanism underlying these therapeutic effects is largely unclear...
February 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208647/soy-leaf-extract-exerts-atheroprotective-effects-via-modulation-of-kr%C3%A3-ppel-like-factor-2-and-adhesion-molecules
#2
Jong-Min Han, Hua Li, Moon-Hee Cho, Seung-Hwa Baek, Chul-Ho Lee, Ho-Yong Park, Tae-Sook Jeong
Soy-leaf extracts exert their cardioprotective effects by inducing endothelium-dependent vasodilation in the arteries, and they favorably modulate the serum lipid profile. In this study, we investigated the atheroprotective effects of an ethanol extract of soy leaf (ESL) in human umbilical vein endothelial cells (HUVECs) and high-cholesterol diet (HCD)-fed low-density lipoprotein receptor deficient (LDLR-/-) mice. ESL induced the expression of Krüppel-like factor 2 (KLF2), an endothelial transcription factor, and endothelial nitric oxide synthase (eNOS), and suppressed the expression of vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) through moderate inflammatory signal activation, not only in tumor necrosis factor-α (TNF-α)-stimulated HUVECs but also in 7-ketocholesterol (7-KC)-stimulated HUVECs...
February 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28207162/plasma-oxidative-stress-and-inflammatory-biomarkers-are-associated-with-the-sizes-of-the-left-atrium-and-pulmonary-vein-in-atrial-fibrillation-patients
#3
Jin-Yi Li, Yan He, Hong-Hong Ke, Yu Jin, Zhi-Yuan Jiang, Guo-Qiang Zhong
BACKGROUND: Oxidative stress and inflammatory processes are responsible for the pathogenesis of AF, but their relationship with the sizes of the LA and PVs in AF patients remains unclear. HYPOTHESIS: Oxidative stress and inflammatory processes are associated with the sizes of the LA and PVs in AF patients. METHODS: 82 AF patients were compared to 30 control patients by using a case-control study design. Oxidative stress, inflammatory biomarkers and the sizes of the LA and PVs were detected...
February 16, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28202546/identification-of-a-novel-series-of-anti-inflammatory-and-anti-oxidative-phospholipid-oxidation-products-containing-cyclopentenone-moiety-in-vitro-and-in-vivo-implication-in-atherosclerosis
#4
Jianhong Lu, Shuyuan Guo, Xinli Xue, Qun Chen, Jing Ge, Yujuan Zhuo, Huiqin Zhong, Buxing Chen, Mingming Zhao, Wei Han, Takashi Suzuki, Mingjiang Zhu, Lin Xia, Claus Schneider, Timothy S Blackwell, Ned A Porter, Lemin Zheng, Sotirios Tsimikas, Huiyong Yin
Oxidative stress and inflammation are two major contributing factors to atherosclerosis, a leading cause for cardiovascular diseases (CVDs). Oxidation of phospholipids on the surface of low density lipoprotein (LDL) particles generated under oxidative stress has been associated with the progression of atherosclerosis but the underlying molecular mechanisms remain poorly defined. We identified a novel series of oxidation products containing cyclopentenone moiety, termed deoxy-A2/J2-isoprostanes-phosphocholine (deoxy-A2/J2-IsoP-PC), from 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (PAPC) in vivo using mass spectrometry and by comparison to a chemically synthesized standard...
February 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28202387/varenicline-enhances-oxidized-ldl-uptake-by-increasing-expression-of-lox-1-and-cd36-scavenger-receptors-through-%C3%AE-7-nachr-in-macrophages
#5
Yuki Kanaoka, Mitsuhisa Koga, Keita Sugiyama, Kaoru Ohishi, Yasufumi Kataoka, Atsushi Yamauchi
Varenicline is a widely used and effective drug for smoking cessation. It is a partial agonist of the α4β2 nicotinic acetylcholine receptor (nAChR) and full agonist of α7 nAChR. We have reported that varenicline aggravates formation of atherosclerotic plaques through α7 nAChR in apolipoprotein E knockout mice. However, little is known about its effects on macrophages in atherosclerotic plaques. Here, we ascertained whether varenicline promotes oxidized low-density lipoprotein (oxLDL) uptake in mouse peritoneal macrophages in vitro and clarified its mechanism...
February 12, 2017: Toxicology
https://www.readbyqxmd.com/read/28202270/acute-metabolic-and-endocrine-responses-induced-by-glucose-and-fructose-in-healthy-young-subjects-a-double-blinded-randomized-crossover-trial
#6
Wenwen Cai, Jie Li, Jiahui Shi, Bo Yang, Jun Tang, Helen Truby, Duo Li
BACKGROUND AND OBJECTIVE: A rise in fructose consumption has been implicated in the etiology of obesity, diabetes and cardiovascular disease. Serum uric acid (UA) elevates after fructose ingestion, increasing the risk of cardiovascular disease. However, the impact of fructose ingestion on nitric oxide (NO) has not yet been confirmed. The aim of this study was to investigate the postprandial metabolic and endocrine responses following an acute ingestion of fructose and glucose in healthy subjects...
February 3, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28198160/oxidative-stress-gene-polymorphisms-may-have-impact-in-the-development-of-ischemic-stroke
#7
Bensu Karahalil, Aylin Elkama, Gürdal Orhan
INTRODUCTION: Antioxidants are responsible for detoxification of harmful effects of ROS. Genetic factors may influence antioxidant activity due to polymorphisms on antioxidant enzymes. These polymorphisms can be risk in ischemic stroke (IS) risk. IS is a disorder with genetic and environmental factors contributing to overall risk. Although there have been a few studies there have been no reports on Catalase; CAT C262T, manganese superoxide dismutase; MnSOD Ala16Val, glutathione peroxidase 1; GPX1 Pro198Leu gene polymorphisms and the risk of IS...
February 15, 2017: Journal of Gene Medicine
https://www.readbyqxmd.com/read/28198114/immunoaffinity-knockout-of-saponin-glycosides-from-asparagus-racemosus-to-assess-anti-lipid-peroxidation
#8
Churanya Onlom, Watoo Phrompittayarat, Waraporn Putalun, Neti Waranuch, Kornkanok Ingkaninan
INTRODUCTION: Asparagus racemosus Willd (Asparagaceae family), known as Shatavari, is important in Ayurveda and traditional Thai medicines. The saponin glycosides, shatavarin I and IV are major constituents in its roots and may be responsible for their actions including protection against lipid peroxidation and carcinogenesis. OBJECTIVE: To develop an immunoaffinity column for isolating compounds with structures related to shatavarin IV from crude extracts of A...
February 15, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/28197300/long-term-treatment-of-native-ldl-induces-senescence-of-cultured-human-endothelial-cells
#9
Sung-Tack Oh, Hoon Park, Hyun Joong Yoon, Sung Yeul Yang
The study aimed to evaluate whether the treatment of primary cultured human endothelial cells with native low-density lipoprotein (nLDL) could induce their senescence and to uncover some of the putative mechanisms involved. For this purpose, human umbilical vein endothelial cells (HUVECs) were subcultured and/or continuously cultured with nLDL (0, 2, 5, and 10 μg protein/mL), for up to 9 days. The results indicated that nLDL inhibited the proliferation of HUVECs by arresting the cell cycle at G1 phase. The G1-arrested cells showed increase in cytosolic senescence-associated-β-galactosidase (SA-β-Gal) activity, a biomarker of cellular senescence...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28193797/mediterranean-diet-improves-high-density-lipoprotein-function-in-high-cardiovascular-risk-individuals-a-randomized-controlled-trial
#10
Álvaro Hernáez, Olga Castañer, Roberto Elosua, Xavier Pintó, Ramón Estruch, Jordi Salas-Salvadó, Dolores Corella, Fernando Arós, Lluis Serra-Majem, Miquel Fiol, Manuel Ortega-Calvo, Emilio Ros, Miguel Ángel Martínez-González, Rafael de la Torre, M Carmen López-Sabater, Montserrat Fitó
BACKGROUND: The biological functions of high-density lipoproteins (HDLs) contribute to explaining the cardioprotective role of the lipoprotein beyond quantitative HDL cholesterol levels. A few small-scale interventions with a single antioxidant have improved some HDL functions. However, to date, no long-term, large-scale, randomized controlled trial has been conducted to assess the effects of an antioxidant-rich dietary pattern (such as a traditional Mediterranean diet [TMD]) on HDL function in humans...
February 14, 2017: Circulation
https://www.readbyqxmd.com/read/28193083/comparison-of-pure-palm-olein-oil-hydrogenated-oil-containing-palm-and-canola-on-serum-lipids-and-lipid-oxidation-rate-in-rats-fed-with-these-oils
#11
Seyed-Asadollah Amini, Keihan Ghatreh-Samani, Arash Habibi-Kohi, Laleh Jafari
BACKGROUND: Due to increased consumption of canola oil and hydrogenated oil containing palm and palm olein, and their possible effects on serum lipoproteins, the present study was conducted to determine the effects of these oils on lipids and lipid oxidation level. METHODS: In this experimental study, 88 Wistar rats were randomly assigned to four groups. Control group (A) was on a normal diet. Groups B, C, and D, in addition to normal diet, were fed with hydrogenated oil-contained palm oil, pure palm olein oil, and canola oil, respectively for 4 weeks...
February 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28192229/hne-as-an-inducer-of-cox-2
#12
REVIEW
Koji Uchida
Cyclooxygenase-2 (COX-2), an inducible isoform responsible for high levels of prostaglandin (PG) production during inflammation and immune responses, mediate a variety of biological actions involved in vascular pathophysiology. COX-2 is induced by various stimuli, including proinflammatory cytokines, to result in PG synthesis associated with inflammation and carcinogenesis. 4-Hydroxy-2-nonenal (HNE) is one of a group of small molecules that can induce COX-2 expression. The mechanistic studies have revealed that the HNE-induced COX-2 expression results from the stabilization of COX-2 mRNA mediated by the p38 mitogen-activated protein kinase signaling pathway and uniquely requires a serum component, which is eventually identified to be modified low-density lipoproteins (LDLs), such as the oxidized form of LDLs...
February 9, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28191769/suppression-of-transforming-growth-factor-%C3%AE-signaling-delays-cellular-senescence-and-preserves-the-function-of-endothelial-cells-derived-from-human-pluripotent-stem-cells
#13
Hao Bai, Yongxing Gao, Dixie L Hoyle, Tao Cheng, Zack Z Wang
Transplantation of vascular cells derived from human pluripotent stem cells (hPSCs) offers an attractive noninvasive method for repairing the ischemic tissues and for preventing the progression of vascular diseases. Here, we found that in a serum-free condition, the proliferation rate of hPSC-derived endothelial cells is quickly decreased, accompanied with an increased cellular senescence, resulting in impaired gene expression of endothelial nitric oxide synthase (eNOS) and impaired vessel forming capability in vitro and in vivo...
February 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28191513/dietary-cholesterol-and-egg-yolk-should-be-avoided-by-patients-at-risk-of-vascular-disease
#14
REVIEW
J David Spence
Recent recommendations that limits to dietary cholesterol be dropped were probably heavily influenced by propaganda from the egg industry. After conviction for false advertising, the industry has spent hundreds of millions of dollars to convince the public, physicians, and policy makers that dietary cholesterol and egg yolk are harmless. However, there are good reasons for longstanding recommendations that dietary cholesterol be limited to <200 mg/ day in persons at risk of vascular disease. It is seldom understood that this essentially means all people in developed countries who expect to attain an advanced age...
April 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28191471/lipids-a-suitable-therapeutic-target-in-diabetic-neuropathy
#15
REVIEW
M C Perez-Matos, M C Morales-Alvarez, C O Mendivil
Diabetic polyneuropathy (DPN) encompasses multiple syndromes with a common pathogenesis. Glycemic control shows a limited correlation with DPN, arguing in favor of major involvement of other factors, one of which is alterations of lipid and lipoprotein metabolism. Consistent associations have been found between plasma triglycerides/remnant lipoproteins and the risk of DPN. Studies in cultured nerve tissue or in murine models of diabetes have unveiled mechanisms linking lipid metabolism to DPN. Deficient insulin action increases fatty acids flux to nerve cells, inducing mitochondrial dysfunction, anomalous protein kinase C signaling, and perturbations in the physicochemical properties of the plasma membrane...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28190386/high-density-lipoprotein-and-low-density-lipoprotein-therapeutic-approaches-in-acute-coronary-syndromes
#16
Emmanuel Androulakis, Effimia Zacharia, Nikolaos Papageorgiou, Eirini Lioudaki, Dimitris Bertsias, Marietta Charakida, Gerasimos Siasos, Dimitris Tousoulis
Low-density lipoprotein cholesterol (LDL), and especially its oxidized form, renders the atherosclerotic plaque vulnerable to rupture in acute coronary syndromes (ACS). On the other hand, high-density lipoprotein (HDL) is considered an anti-atherogenic molecule. The more recent HDL-targeted drugs may prove to be superior to those used before. Indeed, delipidated HDL and HDL mimetics are efficient in increasing HDL levels, while the apoA-I upregulation with RVX-208 appears to offer a clinical benefit which is beyond the HDL related effects...
February 9, 2017: Current Cardiology Reviews
https://www.readbyqxmd.com/read/28188431/lipoprotein-a-and-its-role-in-inflammation-atherosclerosis-and-malignancies
#17
Evelyn Orsó, Gerd Schmitz
Lipoprotein (a) (Lp(a)) is a modified low-density lipoprotein (LDL) particle with an additional specific apolipoprotein (a), covalently attached to apolipoprotein B‑100 of LDL by a single thioester bond. Increased plasma Lp(a) level is a genetically determined, independent, causal risk factor for cardiovascular disease.The precise quantification of Lp(a) in plasma is still hampered by mass-sensitive assays, large particle variation, poor standardization and lack of assay comparability.The physiological functions of Lp(a) include wound healing, promoting tissue repair and vascular remodeling...
February 10, 2017: Clinical Research in Cardiology Supplements
https://www.readbyqxmd.com/read/28181912/the-role-of-oxidative-stress-and-nadph-oxidase-in-the-pathogenesis-of-atherosclerosis
#18
Dorota Bryk, Wioletta Olejarz, Danuta Zapolska-Downar
Reactive oxygen species (ROS) play a key role in the pathogenesis of atherosclerosis. The main mechanisms which are involved are low-density lipoprotein oxidative modification, inactivation of nitric oxide and modulation of redox-sensitive signaling pathways. ROS contribute to several aspects of atherosclerosis including endothelial cell dysfunction, monocyte/macrophage recruitment and activation, stimulation of inflammation, and inducing smooth muscle cell migration and proliferation. NADPH oxidase is the main source of ROS in the vasculature...
January 28, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28181168/apoa-i-sr-bi-modulates-s1p-s1pr2-mediated-inflammation-through-the-pi3k-akt-signaling-pathway-in-huvecs
#19
Kun Ren, Yan-Ju Lu, Zhong-Cheng Mo, Xing -Liu, Zhen-Li Tang, Yue Jiang, Xiao-Shan Peng, Li Li, Qing-Hai Zhang, Guang-Hui Yi
Endothelial dysfunction plays a vital role during the initial stage of atherosclerosis. Oxidized low-density lipoprotein (ox-LDL) induces vascular endothelial injury and vessel wall inflammation. Sphingosine-1-phosphate (S1P) exerts numerous vasoprotective effects by binding to diverse S1P receptors (S1PRs; S1PR1-5). A number of studies have shown that in endothelial cells (ECs), S1PR2 acts as a pro-atherosclerotic mediator by stimulating vessel wall inflammation through the phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway...
February 8, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28177697/dysfunction-of-endothelial-progenitor-cells-in-hyperlipidemic-rats-involves-the-increase-of-nadph-oxidase-derived-reactive-oxygen-species-production
#20
Ting-Bo Li, Jie-Jie Zhang, Bin Liu, Xiu-Ju Luo, Qi-Lin Ma, Jun Peng
NADPH oxidase (NOX) is a major source of reactive oxygen species (ROS) in the body and it plays a key role in mediation of oxidative injury in cardiovascular system. The purposes of this study are to evaluate the status of NOX in EPCs of hyperlipidemic rats and to determine whether NOX- derived ROS promotes the dysfunction of endothelial progenitor cells (EPCs). The rats were fed on high-fat diet for 8 weeks to establish a hyperlipidemic rat model, which showed the increased plasma lipids and the impaired functions of circulating EPCs (including the reduced abilities in migration and adhesion), accompanied by an increase in NOX activity and ROS production...
October 20, 2016: Canadian Journal of Physiology and Pharmacology
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