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Ldl-receptor-related protein

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https://www.readbyqxmd.com/read/28623937/the-association-of-lipid-metabolism-relative-gene-polymorphisms-and-ischemic-stroke-in-han-and-uighur-population-of-xinjiang
#1
Yun-Hua Yue, Ling-Yun Liu, Liang Hu, You-Mei Li, Jie-Ping Mao, Xiao-Ying Yang, Na-Mu Dila
BACKGROUND: The present study is aimed to evaluate difference of lipid metabolism related gene single nucleotide polymorphisms (SNPs) with ischemic stroke (IS) in Han and Uighur population of Xinjiang, China. METHODS: Four hundred eight patients with ischemic stroke and 347 unrelated healthy individuals of age and sex matched were genotyped for Apolipoprotein A5 (ApoA5), lipoprotein lipase (LPL), Cholesteryl ester transfer protein (CETP) and low-density lipoprotein receptor (LDL-R) genes...
June 17, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28621732/lipid-accumulation-in-hepg2-cells-is-attenuated-by-strawberry-extract-through-ampk-activation
#2
Tamara Y Forbes-Hernández, Francesca Giampieri, Massimiliano Gasparrini, Sadia Afrin, Luca Mazzoni, Mario D Cordero, Bruno Mezzetti, José L Quiles, Maurizio Battino
Regulation of lipid metabolism is essential for treatment and prevention of several chronic diseases such as obesity, diabetes, and cardiovascular diseases, which are responsible for most deaths worldwide. It has been demonstrated that the AMP-activated protein kinase (AMPK) has a direct impact on lipid metabolism by modulating several downstream-signaling components. The main objective of the present work was to evaluate the in vitro effect of a methanolic strawberry extract on AMPK and its possible repercussion on lipid metabolism in human hepatocellular carcinoma cells (HepG2)...
June 16, 2017: Nutrients
https://www.readbyqxmd.com/read/28615463/low-density-lipoprotein-receptor-related-proteins-in-skeletal-development-and-disease
#3
REVIEW
Tao Yang, Bart O Williams
The identification of the low-density lipoprotein receptor (LDLR) provided a foundation for subsequent studies in lipoprotein metabolism, receptor-mediated endocytosis, and many other fundamental biological functions. The importance of the LDLR led to numerous studies that identified homologous molecules and ultimately resulted in the description of the LDL-receptor superfamily, a group of proteins that contain domains also found in the LDLR. Subsequent studies have revealed that members of the LDLR-related protein family play roles in regulating many aspects of signal transduction...
July 1, 2017: Physiological Reviews
https://www.readbyqxmd.com/read/28595908/association-of-angiotensin-ii-receptor-1-and-lectin-like-oxidized-low-density-lipoprotein-receptor-1-mediates-the-cardiac-hypertrophy%C3%A2-induced-by-oxidized-low-density-lipoprotein
#4
Yunzi Zhao, Yuqiu Li, Xiaohui Ning, Keping Chen, Shu Zhang
To date the molecular mechanism of cardiac hypertrophy has not been completely elucidated. Since oxidized low-density lipoprotein (ox-LDL) is considered a risk marker for early ventricular remodeling, we speculated that ox-LDL may be related to cardiac hypertrophy. We observed the significantly upregulation of plasma ox-LDL and hypertrophic responses, such as cardiomyocyte size and specific gene expressions in Apo E(-/-) mice fed with high fat diet, accompanied by the upregulation of AT1-R and lectin-like oxidized low-density protein receptor 1 (LOX-1)...
June 5, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28587104/c1q-tnf-related-protein-9-ameliorates-ox-ldl-induced-endothelial-dysfunction-via-pgc-1%C3%AE-ampk-mediated-antioxidant-enzyme-induction
#5
Haijian Sun, Xuexue Zhu, Yuetao Zhou, Weiwei Cai, Liying Qiu
Oxidized low-density lipoprotein (ox-LDL) accumulation is one of the critical determinants in endothelial dysfunction in many cardiovascular diseases such as atherosclerosis. C1q/TNF-related protein 9 (CTRP9) is identified to be an adipocytokine with cardioprotective properties. However, the potential roles of CTRP9 in endothelial function remain largely elusive. In the present study, the effects of CTRP9 on the proliferation, apoptosis, migration, angiogenesis, nitric oxide (NO) production and oxidative stress in human umbilical vein endothelial cells (HUVECs) exposed to ox-LDL were investigated...
May 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28584820/the-ldl-receptor-related-protein-1-at-the-crossroads-of-lipoprotein-metabolism-and-insulin-signaling
#6
REVIEW
Dianaly T Au, Dudley K Strickland, Selen C Muratoglu
The metabolic syndrome is an escalating worldwide public health concern. Defined by a combination of physiological, metabolic, and biochemical factors, the metabolic syndrome is used as a clinical guideline to identify individuals with a higher risk for type 2 diabetes and cardiovascular disease. Although risk factors for type 2 diabetes and cardiovascular disease have been known for decades, the molecular mechanisms involved in the pathophysiology of these diseases and their interrelationship remain unclear...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28577571/genetic-determinants-of-inherited-susceptibility-to-hypercholesterolemia-a-comprehensive-literature-review
#7
REVIEW
C S Paththinige, N D Sirisena, Vhw Dissanayake
Hypercholesterolemia is a strong determinant of mortality and morbidity associated with cardiovascular diseases and a major contributor to the global disease burden. Mutations in four genes (LDLR, APOB, PCSK9 and LDLRAP1) account for the majority of cases with familial hypercholesterolemia. However, a substantial proportion of adults with hypercholesterolemia do not have a mutation in any of these four genes. This indicates the probability of having other genes with a causative or contributory role in the pathogenesis of hypercholesterolemia and suggests a polygenic inheritance of this condition...
June 2, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28495363/app-aplp2-and-lrp1-interact-with-pcsk9-but-are-not-required-for-pcsk9-mediated-degradation-of-the-ldlr-in-vivo
#8
Ting Fu, YangYang Guan, Junjie Xu, Yan Wang
Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a secreted protein that post-transcriptionally regulates the levels of hepatic low-density lipoprotein receptors (LDLRs). PCSK9 binds to the extracellular domain of the LDLR, and the PCSK9-LDLR complex is internalized through canonical clathrin-dependent endocytosis and then delivered to lysosomes for degradation. The mechanism by which PCSK9 blocks recycling of the LDLR has not been fully defined. Previous reports showed that amyloid precursor-like protein 2 (APLP2) interacts with PCSK9, but its role in PCSK9-mediated LDLR degradation remains controversial...
May 9, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28450903/pcsk9-as-a-therapeutic-target-for-cardiovascular-disease
#9
Pei-Ying Zhang
It is well recognized that the elevated plasma level of low-density lipoprotein-cholesterol (LDL-C) is a major risk factor for atherosclerosis and cardiovascular disease (CVD). Deposition of pro-atherogenic LDL-C, on the intima of arterial wall, contributes to plaque formation and atherosclerosis, which further leads to lowered blood flow to vital organs and increased risk of CVD. The most commonly used statin therapy is effective in reducing dyslipidemia and preventing cardiovascular events only in about half of the patient population...
March 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28446629/vitamin-d-receptor-and-megalin-gene-polymorphisms-are-associated-with-longitudinal-cognitive-change-among-african-american-urban-adults
#10
May A Beydoun, Salman M Tajuddin, Greg A Dore, Jose-Atilio Canas, Hind A Beydoun, Michele K Evans, Alan B Zonderman
Background: The link between longitudinal cognitive change and polymorphisms in the vitamin D receptor (VDR) and MEGALIN [or LDL receptor-related protein 2 (LRP2)] genes remains unclear, particularly among African-American (AA) adults.Objectives: We aimed to evaluate associations of single nucleotide polymorphisms (SNPs) for VDR [rs11568820 (Cdx-2:T/C), rs1544410 (BsmI:G/A), rs7975232 (ApaI:A/C), rs731236 (TaqI:G/A)] and LRP2 [rs3755166:G/A,rs2075252:C/T, rs2228171:C/T] genes with longitudinal cognitive performance change in various domains of cognition...
June 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28444734/highly-electronegative-low-density-lipoprotein-l5-evokes-microglial-activation-and-creates-a-neuroinflammatory-stress-via-toll-like-receptor-4-signaling
#11
Liang-En Yu, Chiou-Lian Lai, Ching-Tien Lee, Jiz-Yuh Wang
Atherogenic risk factors, such as hypercholesterolemia, are associated with increased risk of neurodegeneration, especially Alzheimer's dementia. Human plasma electronegative low-density lipoprotein [LDL(-)], especially L5, may serve as an important contributing factor. L5 promoting an inflammatory action in atherosclerosis has been extensively studied. However, the role of L5 in inducing neuroinflammation remains unknown. Here, we examined the impact of L5 on immune activation and cell viability in cultured BV-2 microglia...
April 26, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28424622/pravastatin-chronic-treatment-sensitizes-hypercholesterolemic-mice-muscle-to-mitochondrial-permeability-transition-protection-by-creatine-or-coenzyme-q10
#12
Estela N B Busanello, Ana C Marques, Noelia Lander, Diogo N de Oliveira, Rodrigo R Catharino, Helena C F Oliveira, Anibal E Vercesi
Statins are efficient cholesterol-lowering medicines utilized worldwide. However, 10% of patients suffer from adverse effects specially related to skeletal muscle function. Pro- or anti-oxidant effects of statins have been reported. Here we hypothesized that statins induce muscle mitochondrial oxidative stress leading to mitochondrial permeability transition (MPT) which may explain statin muscle toxicity. Thus, our aims were to investigate the effects of statin chronic treatment on muscle mitochondrial respiration rates, MPT and redox state indicators in the context of hypercholesterolemia...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28407763/klotho-ameliorates-oxidized-low-density-lipoprotein-ox-ldl-induced-oxidative-stress-via-regulating-lox-1-and-pi3k-akt-enos-pathways
#13
Yansheng Yao, Yanbing Wang, Yibo Zhang, Chang Liu
BACKGROUND: Atherosclerosis is a common cardiovascular disease that causes myocardial infarction, heart failure, and stroke. Increased oxidized low density lipoprotein (ox-LDL) in the sub-endothelium is the characteristic origin of atherogenesis. Klotho, an anti-aging protein, has been reported to protect against atherosclerosis and ameliorate endothelial dysfunction in vivo. The aim of this study is to investigatethe anti-oxidative activity of Klothoin ox-LDL-treated human umbilical vein endothelial cells (HUVECs)...
April 13, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28387660/pattern-of-lrp6-gene-expression-in-tumoral-tissues-of-colorectal-cancer
#14
Elham Rismani, Mohammad Sadegh Fazeli, Habibollah Mahmoodzadeh, Aghdas Movassagh, Sina Azami, Morteza Karimipoor, Ladan Teimoori-Toolabi
BACKGROUND: Colorectal cancer (CRC) is known as one of the most leading causes of death from cancer in the world. Wnt signaling pathway is the most important signaling pathway activated in this type of cancer. The low-density lipoprotein (LDL) receptor-related protein-6 (LRP6) functions as a co-receptor in order to trigger this signaling pathway. OBJECTIVE: The expression of LRP6 was studied in cell lines, tumoral and normal adjacent tissues from patients affected with colorectal cancer...
March 31, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28341248/abnormal-lipid-lipoprotein-metabolism-and-high-plasma-testosterone-levels-in-male-but-not-female-aromatase-knockout-mice
#15
Akiko Amano, Yoshitaka Kondo, Yoshihiro Noda, Mitsuhiro Ohta, Noriaki Kawanishi, Shuichi Machida, Kazuteru Mitsuhashi, Takafumi Senmaru, Michiaki Fukui, Osamu Takaoka, Taisuke Mori, Jo Kitawaki, Masafumi Ono, Toshiji Saibara, Hiroshi Obayashi, Akihito Ishigami
Sex steroid hormones, such as estrogen and testosterone, are believed to play important roles in lipid metabolism. To elucidate the effects of estrogen depletion on lipid metabolism in male and female mice, we used aromatase-knockout (ArKO) mice, in which Cyp19 gene disruption prevented estrogen synthesis in vivo. These mice were divided into the following 4 groups: male and female ArKO mice and male and female wild-type (WT) mice. These mice were fed a normal-fat diet (13.6% fat) ad libitum. At 159 days after birth, the mice were tested for liver and plasma lipid content and hepatic hormone receptor- and lipid/lipoprotein metabolism-related gene expression...
May 15, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28340945/plasma-levels-of-apolipoprotein-e-apoe-genotype-and-risk-of-dementia-and-ischemic-heart-disease-a-review
#16
REVIEW
Katrine Laura Rasmussen
Dementia is one of the major causes of disability in later life, and ischemic heart disease is a leading cause of morbidity and mortality. Apolipoprotein E (apoE) plays a pivotal role in lipoprotein metabolism in the brain and in the periphery, and is implicated in both dementia and ischemic heart disease. Peripherally, liver-derived apoE is the main source of plasma apoE. Approximately half of plasma apoE is associated with triglyceride-rich lipoproteins, where apoE serves as the main ligand for the low density lipoprotein (LDL) receptor and the LDL receptor Related Protein (LRP)...
December 2016: Atherosclerosis
https://www.readbyqxmd.com/read/28337300/mutation-of-mir-21-targets-endogenous-lipoprotein-receptor-related-protein-6-and-nonalcoholic-fatty-liver-disease
#17
Chang-Ping Li, Hong-Jue Li, Jiao Nie, Xia Chen, Xian Zhou
Nonalcoholic fatty liver disease (NAFLD) is a chronic disorder characterized by hepatic fat accumulation and abnormal lipid metabolism. Although miR-21 has been implicated in nonalcoholic fatty liver disease, it is unknown whether miR-21 could function as a therapeutic target. Here, we perform transfection analysis of miR-21 mimic or control mimic to evaluate the effects of miR-21 expression levels on human HepG2 nonalcoholic fatty liver cells. We used siRNA techniques to knock down miR-21 in HepG2 and control 293T cell lines, and then monitored lipid production and the expression levels of genes involved in lipid metabolism...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28316179/-effects-and-related-mechanism-of-angiotensin-1-7-on-toll-like-receptor-4-mediated-oxidative-stress-in-human-umbilical-vein-endothelial-cells
#18
W F Yan, J J Xue, H Y Yang, B Liang, Z M Yang
Objective: To explore the role and related mechanisms of angiotensin-(1-7)(Ang-(1-7)) on Toll-like receptor 4 (TLR4) mediated oxidized low-density lipoprotein(ox-LDL)-induced oxidative stress in human umbilical vein endothelial cells (HUVECs). Methods: HUVECs were cultured in vitro and divided into six groups: the control group (normal medium), the ox-LDL group(treated with 75 mg/L ox-LDL), the ox-LDL+ Ang-(1-7) group (1 μmol/L Ang-(1-7) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ Ang-(1-7)+ A-779 group(1 μmol/L A-779 (Mas receptor) pretreated for 30 minutes, 1 μmol/L Ang-(1-7) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ A-779 group (1 μmol/L A-779 pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL), the ox-LDL+ HTA125 group (10 μg/L HTA125 (TLR4-blocking antibody) pretreated for 30 minutes, then intervened with 75 mg/L ox-LDL )...
March 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28301372/news-on-the-molecular-regulation-and-function-of-hepatic-low-density-lipoprotein-receptor-and-ldlr-related-protein-1
#19
Bart van de Sluis, Melinde Wijers, Joachim Herz
PURPOSE OF REVIEW: Clearing of atherogenic lipoprotein particles by the liver requires hepatic low-density lipoprotein receptor (LDLR) and LDLR-related protein 1 (LRP1). This review highlights recent studies that have expanded our understanding of the molecular regulation and metabolic functions of LDLR and LRP1 in the liver. RECENT FINDINGS: Various proteins orchestrate the intracellular trafficking of LDLR and LRP1. After internalization, the receptors are redirected via recycling endosomes to the cell surface...
June 2017: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/28298885/functional-roles-of-the-interaction-of-app-and-lipoprotein-receptors
#20
REVIEW
Theresa Pohlkamp, Catherine R Wasser, Joachim Herz
The biological fates of the key initiator of Alzheimer's disease (AD), the amyloid precursor protein (APP), and a family of lipoprotein receptors, the low-density lipoprotein (LDL) receptor-related proteins (LRPs) and their molecular roles in the neurodegenerative disease process are inseparably interwoven. Not only does APP bind tightly to the extracellular domains (ECDs) of several members of the LRP group, their intracellular portions are also connected through scaffolds like the one established by FE65 proteins and through interactions with adaptor proteins such as X11/Mint and Dab1...
2017: Frontiers in Molecular Neuroscience
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