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Ldl-receptor-related protein

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https://www.readbyqxmd.com/read/28936395/antioxidative-activity-of-high-density-lipoprotein-hdl-mechanistic-insights-into-potential-clinical-benefit
#1
REVIEW
Fernando Brites, Maximiliano Martin, Isabelle Guillas, Anatol Kontush
Uptake of low-density lipoprotein (LDL) particles by macrophages represents a key step in the development of atherosclerotic plaques, leading to the foam cell formation. Chemical modification of LDL is however necessary to induce this process. Proatherogenic LDL modifications include aggregation, enzymatic digestion and oxidation. LDL oxidation by one-electron (free radicals) and two-electron oxidants dramatically increases LDL affinity to macrophage scavenger receptors, leading to rapid LDL uptake and fatty streak formation...
December 2017: BBA Clinical
https://www.readbyqxmd.com/read/28878222/angiotensin-ii-induces-cholesterol-accumulation-and-injury-in-podocytes
#2
Yingjie Yang, Qian Yang, Jian Yang, Yiqiong Ma, Guohua Ding
Angiotensin II (Ang II) is a risk factor for the initiation and progression of chronic kidney disease (CKD), as elevated Ang II levels can lead to podocyte injury. However, there have been no studies on the role of Ang II in lipid metabolism or on podocyte injury caused by lipid dysfunction. Our study showed that Ang II induced lipid droplet (LD) accumulation and expression of the LD marker adipose differentiation-related protein (ADRP) in podocytes, and the extent of lipid deposition could be alleviated by losartan...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28828729/dr1-activation-reduces-the-proliferation-of-vascular-smooth-muscle-cells-by-jnk-c-jun-dependent-increasing-of-prx3
#3
Junting Chen, Sa Shi, Xiaona Cai, Hongzhu Li, Lina Wang, Hong Li, Changqing Xu
Vascular smooth muscle cells (VSMCs) proliferation is a key process in atherosclerosis. However, little is known about the underlying mechanisms, leading to a lack of effective therapy. This study was to investigate whether dopamine receptor 1 (DR1) is involved in the VSMCs proliferation and related mechanisms. A7r5 cells were treated with oxidized low-density lipoprotein (ox-LDL, 10, 20, 50, 100, 200 µg/mL) in the presence or absence of the SKF38393 (DR1agonist), SCH23390 (DR1antiagonist), SP600125 (JNK inhibitor), PD98059(ERK1/2 inhibitor) or NAC (ROS inhibitor)...
August 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28821575/ldl-switches-the-lrp6-internalization-route-from-flotillin-dependent-to-clathrin-dependent-in-hepatic-cells
#4
Hideki Yamamoto, Daisuke Umeda, Shinji Matsumoto, Akira Kikuchi
Low-density lipoprotein (LDL) receptor-related protein 6 (LRP6) was originally identified as a coreceptor of the Wnt signaling pathway and has been shown to be involved in LDL transport. In polarized hepatocytes, many apical proteins are sorted to the basolateral membrane and then internalized and transported to the apical bile canalicular membrane-a process known as transcytosis. Herein, we show that LRP6 is transcytosed to the apical membrane of polarized hepatic HepG2 cells via a flotillin-dependent manner in the absence of LDL...
August 18, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28810520/studies-on-the-regulation-of-lipid-metabolism-and-the-mechanism-of-the-aqueous-and-ethanol-extracts-of-usnea
#5
Jiali Zhu, Xuemei Zhang, Xiu Chen, Yong Sun, Yaolan Dai, Chang Chen, Tiane Zhang, Zhiyong Yan
OBJECTIVES: Usnea is a lichen of Usnea diffracta Vain and Usnea longissima Ach, which belongs to the genus Usnea Adans of Usneaceae. Usnea exerts numerous pharmacological activities, while its lipid regulatory activities remain unreported. This study aims to evaluate the effects of aqueous and ethanol extracts of Usnea on the regulation of lipid metabolism and to explore the possible mechanism. METHODS: Hyperlipidemia rat model was established by feeding with high-fat diet for 45days...
October 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28804438/green-tea-extract-induces-genes-related-to-browning-of-white-adipose-tissue-and-limits-weight-gain-in-high-energy-diet-fed-rat
#6
Li-Han Chen, Yi-Wen Chien, Chung-Tiang Liang, Ching-Hung Chan, Meng-Han Fan, Hui-Yu Huang
Background: A wealth of research has reported on the anti-obesity effects of green tea extract (GTE). Although browning of white adipose tissue (WAT) has been reported to attenuate obesity, no study has disclosed the effects of GTE on browning in Sprague Dawley rats. Objectives: The aims of the study were to investigate the effects of GTE on anti-obesity and browning, and their underlying mechanisms. Methods: Four groups of rats (n=10/group) were used including a normal diet with vehicle treatment, and a high-energy diet (HED) with vehicle or GTE by oral gavage at 77...
2017: Food & Nutrition Research
https://www.readbyqxmd.com/read/28769070/il6r-haplotype-rs4845625-t-rs4537545-c-is-a-risk-factor-for-simultaneously-high-crp-ldl-and-apob-levels
#7
A A Arguinano, E Naderi, N C Ndiaye, M Stathopoulou, S Dadé, B Alizadeh, S Visvikis-Siest
Interleukin 6 receptor (IL-6R), mediating IL-6's biological functions, plays an important role in different diseases such as diabetes, obesity and cardio-vascular diseases. In this study, we investigated the effects of two single nucleotide polymorphisms (SNPs), within the IL-6R loci, previously associated with C-reactive protein (CRP) and coronary heart diseases risk, and with controversial effects on lipids traits: SNP rs4845625 and SNP rs4537545. The results showed that both investigated SNPs were antagonistically related with CRP levels; the minor rs4845625*T allele was associated with increased CRP levels (P-value=0...
August 3, 2017: Genes and Immunity
https://www.readbyqxmd.com/read/28765047/lysophosphatidic-acid-directly-induces-macrophage-derived-foam-cell-formation-by-blocking-the-expression-of-srbi
#8
Linmu Chen, Jun Zhang, Xiao Deng, Yan Liu, Xi Yang, Qiong Wu, Chao Yu
The leading cause of morbidity and mortality is the result of cardiovascular disease, mainly atherosclerosis. The formation of macrophage foam cells by ingesting ox-LDL and focal retention in the subendothelial space are the hallmarks of the early atherosclerotic lesion. Lysophosphatidic acid (LPA), which is a low-molecular weight lysophospholipid enriched in oxidized LDL, exerts a range of effects on the cardiovascular system. Previous reports show that LPA increases the uptake of ox-LDL to promote the formation of foam cells...
September 23, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28764799/metabolomics-study-of-the-therapeutic-mechanism-of-schisandra-chinensis-lignans-in-diet-induced-hyperlipidemia-mice
#9
Jing-Hui Sun, Xu Liu, Li-Xin Cong, He Li, Cheng-Yi Zhang, Jian-Guang Chen, Chun-Mei Wang
BACKGROUND: Schisandra, a globally distributed plant, has been widely applied for the treatment of diseases such as hyperlipidemia, fatty liver and obesity in China. In the present work, a rapid resolution liquid chromatography coupled with quadruple-time-of-flight mass spectrometry (RRLC-Q-TOF-MS)-based metabolomics was conducted to investigate the intervention effect of Schisandra chinensis lignans (SCL) on hyperlipidemia mice induced by high-fat diet (HFD). METHODS: Hyperlipidemia mice were orally administered with SCL (100 mg/kg) once a day for 4 weeks...
August 1, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28761986/smoking-cessation-reduces-the-lectin-like-low-density-lipoprotein-receptor-index-an-independent-cardiovascular-risk-marker-of-vascular-inflammation
#10
Maki Komiyama, Hiromichi Wada, Koh Ono, Hajime Yamakage, Noriko Satoh-Asahara, Sayaka Shimada, Masaharu Akao, Tatsuya Morimoto, Akira Shimatsu, Yuko Takahashi, Tatsuya Sawamura, Koji Hasegawa
Vessel wall inflammation promotes the destabilization of atherosclerotic plaques. The lectin-like oxidized low-density lipoprotein (LDL) receptor-1 (LOX-1) expressed by vascular cells and monocytes. LOX index is calculated by multiplying LOX-1 ligand containing apolipoprotein B level with the soluble LOX-1. A high LOX index reflects an increased risk for stroke and myocardial infarction. However, the change in LOX index after smoking cessation and the relationship between smoking-related variables and LOX index are unknown...
July 31, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28760743/hypoxia-inducible-protein-2-hig2-hilpda-mediates-neutral-lipid-accumulation-in-macrophages-and-contributes-to-atherosclerosis-in-apolipoprotein-e-deficient-mice
#11
Anja Maier, Hao Wu, Nada Cordasic, Peter Oefner, Barbara Dietel, Christoph Thiele, Alexander Weidemann, Kai-Uwe Eckardt, Christina Warnecke
Recently we identified hypoxia-inducible protein 2 (HIG2)/hypoxia-inducible lipid droplet associated (HILPDA) as lipid droplet (LD) protein. Because HILPDA is highly expressed in atherosclerotic plaques, we examined its regulation and function in murine macrophages, compared it to the LD adipose differentiation-related protein (Adrp)/perilipin 2 (Plin2), and investigated its effects on atherogenesis in apolipoprotein E-deficient (ApoE(-/-)) mice. Tie2-Cre-driven Hilpda knockout (cKO) did not affect viability, proliferation, and ATP levels in macrophages...
July 31, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28758580/chromosomal-micro-aberration-in-a-saudi-family-with-juvenile-myoclonic-epilepsy
#12
Muhammad Imran Naseer, Adeel G Chaudhary, Sameera Sogaty, Mahmood Rasool, Sajjad Karim, Hans-Juergen Schulten, Fehmida Bibi, Peter Natesan Pushparaj, Hussein A Algahtani, Mohammad H Al-Qahtani
Epilepsy is genetically complex neurological disorder affecting millions of people of the world. Juvenile myoclonic epilepsy (JME) is a most common epilepsy syndromes that starts in the teen age group commonly between ages 12 and 18, and lasts into adulthood. Out of 14 people with epilepsy one suffer with JME. Myoclonic seizures and muscle twitching or uncontrolled jerking are the most common type of seizure in the people suffering with JME. To observe the novel CNVs involved in JME we investigated a Saudi family with nine siblings with one male and one female affected members...
July 31, 2017: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/28733963/peroxisome-proliferator-activated-receptor-gamma-expression-in-peripheral-blood-mononuclear-cells-and-angiopoietin-like-protein-4-levels-in-obese-children-and-adolescents
#13
Z A Sadeghabadi, M Nourbakhsh, M Alaee, B Larijani, M Razzaghy-Azar
PURPOSE: The peroxisome proliferator-activated receptor γ (PPARγ) is highly expressed in adipose tissue and functions as transcriptional regulator of metabolism and adipocyte differentiation. Angiopoietin-like protein 4 (ANGPTL4), a central player in various aspects of energy homoeostasis, is induced by PPARγ. The aim of this study was to evaluate ANGPTL4 plasma levels and PPARγ gene expression in peripheral blood mononuclear cells (PBMCs) of children and adolescents with obesity and their association with metabolic parameters...
July 21, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28729214/milk-fat-globule-membrane-supplementation-with-voluntary-running-exercise-attenuates-age-related-motor-dysfunction-by-suppressing-neuromuscular-junction-abnormalities-in-mice
#14
Michiko Yano, Yoshihiko Minegishi, Satoshi Sugita, Noriyasu Ota
Age-related loss of skeletal muscle mass and function attenuates physical performance, and maintaining fine muscle innervation is known to play an important role in its prevention. We had previously shown that consumption of milk fat globule membrane (MFGM) with habitual exercise improves the muscle mass and motor function in humans and mice. Improvement of neuromuscular junction (NMJ) was suggested as one of the mechanisms underlying these effects. In this study, we evaluated the effect of MFGM intake combined with voluntary running (MFGM-VR) on morphological changes of NMJ and motor function in aging mice...
July 18, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28690119/cholesterol-lowering-effect-of-aralia-elata-miq-seem-via-the-activation-of-srebp-2-and-the-ldl-receptor
#15
Kyung-A Hwang, Yu-Jin Hwang, Jin Song
BACKGROUND: Hyperlipidemia causes arteriosclerosis, a risk factor for coronary heart disease. Prevention of hyperlipidemia by improving dietary habits has recently attracted attention. In this regard, we investigated whether Aralia elata (Miq.) Seem (AE) extract inhibits hepatic cholesterol accumulation and modulate the cellular signaling pathway. METHODS: To determine AE's cholesterol regulating mechanism, we measured cholesterol level, 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase activity and cholesterol regulating-related gene expression in HepG2 cells and in high-fat diet (HFD)-induced mice using ELISA and RT-PCR assay...
July 6, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28686975/overexpression-of-low-density-lipoprotein-receptors-stimulated-by-vascular-endothelial-growth-factor-in-fibroblasts-from-pterygium
#16
Mengliang Wu, Jiajian Wang, Qianwei Zhang, Yan Wang, Liangliang Niu, Tingting Shao
The activation of subconjunctival fibroblasts is believed to be responsible for the pathogenesis of pterygium. Vascular endothelial growth factor (VEGF) appears to be the most potent stimulator of formation and progression of pterygium. Pterygium excision is a common procedure, although the recurrence rates remain high. Various postoperative adjuvant therapies are now attempted to lower the recurrence rate, with severe side effects. To offer a greater therapeutic effect and lower side effects, it's necessary to discover a constant nanoparticle drug delivery targeting to subconjunctival fibroblasts in pterygium (PSFs)...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28684538/tissue-type-plasminogen-activator-regulates-macrophage-activation-and-innate-immunity
#17
Elisabetta Mantuano, Pardis Azmoon, Coralie Brifault, Michael A Banki, Andrew S Gilder, Wendy M Campana, Steven L Gonias
Tissue-type plasminogen activator (tPA) is the major intravascular activator of fibrinolysis and a ligand for receptors involved in cell signaling. In cultured macrophages, tPA inhibits the response to lipopolysaccharide (LPS) by a pathway that apparently requires low-density lipoprotein receptor-related protein-1 (LRP1). Herein, we show that the mechanism by which tPA neutralizes LPS involves rapid reversal of IκBα phosphorylation. tPA independently induced transient IκBα phosphorylation and extracellular signal-regulated kinase 1/2 (ERK1/2) activation in macrophages; however, these events did not trigger inflammatory mediator expression...
September 14, 2017: Blood
https://www.readbyqxmd.com/read/28677864/cd36-expression-in-peripheral-blood-mononuclear-cells-reflects-the-onset-of-atherosclerosis
#18
Burak Yazgan, Erdi Sozen, Betul Karademir, Seyfettin Ustunsoy, Umit Ince, Neven Zarkovic, Nesrin Kartal Ozer
Together with complex genetic and environmental factors, increased serum cholesterol and ox-LDL levels are considered as major triggering factors of atherosclerosis. Mononuclear cell infiltration to the arterial wall and uptake of ox-LDL, which is facilitated by CD36 receptor through an uncontrolled manner, play a key role in foam cell formation followed by atherogenesis development. The aim of this study was to analyze if CD36 expression in peripheral blood mononuclear cells reflect its aortic tissue level in hypercholesterolemia...
July 5, 2017: BioFactors
https://www.readbyqxmd.com/read/28662213/verification-and-characterization-of-an-alternative-low-density-lipoprotein-receptor-related-protein-1-splice-variant
#19
Marlen Kolb, Susanne Kurz, Angelika Schäfer, Klaus Huse, Andreas Dietz, Gunnar Wichmann, Gerd Birkenmeier
BACKGROUND: Low density lipoprotein (LDL) receptor-related protein 1 (LRP1) is a ubiquitously expressed multi-ligand endocytosis receptor implicated in a wide range of signalling, among others in tumour biology. Tumour-associated genomic mutations of the LRP1 gene are described, but nothing is known about cancer-associated expression of LRP1 splice variants Therefore, the focus of this study was on an annotated truncated LRP1 splice variant (BC072015.1; NCBI GenBank), referred to as smLRP1, which was initially identified in prostate and lung carcinoma...
2017: PloS One
https://www.readbyqxmd.com/read/28646711/effect-of-memantine-on-c-reactive-protein-and-lipid-profiles-in-bipolar-disorder
#20
Hui Hua Chang, Po See Chen, Tzu-Yun Wang, Sheng-Yu Lee, Shiou-Lan Chen, San-Yuan Huang, Jau-Shyong Hong, Yen Kuang Yang, Ru-Band Lu
BACKGROUND: Balance in the immune system plays roles in bipolar disorder (BD) and its metabolic co-morbidities. Memantine is an NMDA receptor antagonist with anti-inflammatory effects. However, the effects of memantine adjunct treatment on metabolic status of BD are unclear. METHODS: During the 12 weeks period, a total of 191 BD patients were enrolled and split into valproate (VPA) + placebo and VPA + memantine (5mg/day) arms. The fasting plasma levels of high-sensitivity C-reactive protein (CRP) and metabolic indices were assessed...
October 15, 2017: Journal of Affective Disorders
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