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https://www.readbyqxmd.com/read/29339076/inhibition-of-mir-361-5p-suppressed-pulmonary-artery-smooth-muscle-cell-survival-and-migration-by-targeting-abca1-and-inhibiting-the-jak2-stat3-pathway
#1
Xiaoping Zhang, Runxia Shao, Weiwei Gao, Guanghao Sun, Ying Liu, Xian'en Fa
MicroRNAs play a crucial role in the progression of pulmonary arterial hypertension (PAH). The aim of this study was to investigate the effect of miR-361-5p on the proliferation, migration and apoptosis of pulmonary artery smooth muscle cells (PASMCs) that under the treatment of hypoxia and explore the underlying mechanisms. The results proved that hypoxia noticeably up-regulated the expression of miR-361-5p in PASMCs in comparison to the normoxia-treated cells, while TNF-α and IL-6 stimulation had no obvious effects on miR-361-5p level...
January 12, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29325849/coagonist-of-glp-1-and-glucagon-decreases-liver-inflammation-and-atherosclerosis-in-dyslipidemic-condition
#2
Vishal Patel, Amit Joharapurkar, Samadhan Kshirsagar, Brijesh Sutariya, Maulik Patel, Dhreerendra Pandey, Hiren Patel, Ramchandra Ranvir, Shekhar Kadam, Dipam Patel, Rajesh Bahekar, Mukul Jain
Dyslipidemia enhances progression of atherosclerosis. Coagonist of GLP-1 and glucagon are under clinical investigation for the treatment of obesity and diabetes. Earlier, we have observed that coagonist reduced circulating and hepatic lipids, independent of its anorexic effects. Here, we investigated the role of coagonist of GLP-1 and glucagon receptors in complications of diet-induced dyslipidemia in hamsters and humanized double transgenic mice. Hamsters fed on high fat high cholesterol diet were treated for 8 weeks with coagonist of GLP-1 and glucagon receptors (75 and 150 μg/kg)...
January 8, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29323721/brain-derived-neurotrophic-factor-modulates-cholesterol-homeostasis-and-apolipoprotein-e-synthesis-in-human-cell-models-of-astrocytes-and-neurons
#3
Maria Stefania Spagnuolo, Aldo Donizetti, Lucia Iannotta, Vincenza Aliperti, Chiara Cupidi, Amalia Cecilia Bruni, Luisa Cigliano
In the central nervous system, cholesterol is critical to maintain membrane plasticity, cellular function, and synaptic integrity. In recent years, much attention was focused on the role of cholesterol in brain since a breakdown of cholesterol metabolism has been associated with different diseases. Brain-derived neurotrophic factor (BDNF) was previously reported to elicit cholesterol biosynthesis and promote the accumulation of presynaptic proteins in cholesterol-rich lipid rafts, but no data are available on its ability to modulate physiological mechanisms involved in cholesterol homeostasis...
January 11, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29321244/silencing-carboxylesterase-1-in-human-thp-1-macrophages-perturbs-genes-regulated-by-pparg-rxr-and-rar-rxr-downregulation-of-cyp27a1-lxr%C3%AE-signaling
#4
Lee C Mangum, Xiang Hou, Abdolsamad Borazjani, Jung Hwa Lee, Matthew K Ross, J Allen Crow
Macrophage foam cells store excess cholesterol as cholesteryl esters, which need to be hydrolyzed for cholesterol efflux. We recently reported that silencing expression of carboxylesterase 1 (CES1) in human THP-1 macrophages (CES1KD macrophages) reduced cholesterol uptake and decreased expression of CD36 and scavenger receptor-A in cells loaded with acetylated low-density lipoprotein (acLDL). Here, we report that CES1KD macrophages exhibit reduced transcription of cytochrome P450 27A1 ( CYP27A1 ) in non-loaded and acLDL-loaded cells...
January 10, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29313544/dietary-supplementation-of-defatted-kenaf-hibiscus-cannabinus-l-seed-meal-and-its-phenolics-saponins-rich-extract-effectively-attenuates-diet-induced-hypercholesterolemia-in-rats
#5
Kim Wei Chan, Maznah Ismail, Norhaizan Mohd Esa, Mustapha Umar Imam, Der Jiun Ooi, Nicholas M H Khong
Kenaf is one of the important commercial fiber crops worldwide and defatted kenaf seed meal (DKSM) is a secondary by-product from the kenaf industry. Thus, efforts to turn this low-cost agricultural waste into value-added functional food ingredients will definitely bring advantageous impacts to the community health, environment and economy. The present study was aimed to investigate the cardioprotective properties of DKSM and its phenolics-saponins rich extract (PSRE) in diet-induced hypercholesterolemic rat model...
January 9, 2018: Food & Function
https://www.readbyqxmd.com/read/29306077/the-e3-ubiquitin-ligase-hectd1-is-involved-in-abca1-mediated-cholesterol-export-from-macrophages
#6
Shereen M Aleidi, Alryel Yang, Laura J Sharpe, Geetha Rao, Blake J Cochran, Kerry-Anne Rye, Maaike Kockx, Andrew J Brown, Ingrid C Gelissen
The ABC lipid transporters, ABCA1 and ABCG1, are essential for maintaining lipid homeostasis in cells such as macrophages by exporting excess cholesterol to extracellular acceptors. These transporters are highly regulated at the post-translational level, including protein ubiquitination. Our aim was to investigate the role of the E3 ubiquitin ligase HECTD1, recently identified as associated with ABCG1, on ABCG1 and ABCA1 protein levels and cholesterol export function. Here, we show that HECTD1 protein is widely expressed in a range of human and murine primary cells and cell lines, including macrophages, neuronal cells and insulin secreting β-cells...
January 3, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29305383/is-abca1-a-lipid-transfer-protein
#7
Michael C Phillips
ATP-binding cassette transporter A1 (ABCA1) functions as a lipid transporter because it mediates the transfer of cellular phospholipid (PL) and free (unesterified) cholesterol (FC) to apolipoprotein (apo) A-I and related proteins present in the extracellular medium. ABCA1 is a membrane PL translocase and its enzymatic activity leads to transfer of PL molecules from the cytoplasmic leaflet to the exofacial leaflet of a cell plasma membrane. The presence of active ABCA1 in the plasma membrane promotes binding of apoA-I to the cell surface...
January 5, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29300488/atp-binding-cassette-transporter-a-subfamily-8-is-a-sinusoidal-efflux-transporter-for-cholesterol-and-taurocholate-in-mouse-and-human-liver
#8
Kazunari Sasaki, Masanori Tachikawa, Yasuo Uchida, Satoshi Hirano, Fumito Kadowaki, Michitoshi Watanabe, Sumio Ohtsuki, Tetsuya Terasaki
The ATP-binding cassette (ABC) transporter A subfamily 8 (ABCA8) belongs to the ABCA6-like transporters subgroup, which is distinct from the ABCA1-like subgroup in the ABCA family. The expression and function of the short-size human ABCA8 lacking one of the two ATP-binding domains for ATP hydrolysis, which are regularly present in the other ABCA transporters, have been reported. However, the functional differences between the short-size human ABCA8 and full-size human ABCA8 which has the two ATP-binding domains, remain unknown...
January 4, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29298513/andrographolide-inhibits-oxidized-ldl-induced-cholesterol-accumulation-and-foam-cell-formation-in-macrophages
#9
Hung-Chih Lin, Chong-Kuei Lii, Hui-Chun Chen, Ai-Hsuan Lin, Ya-Chen Yang, Haw-Wen Chen
oxLDL is involved in the pathogenesis of atherosclerotic lesions through cholesterol accumulation in macrophage foam cells. Andrographolide, the bioactive component of Andrographis paniculata, possesses several biological activities such as anti-inflammatory, anti-oxidant, and anticancer functions. Scavenger receptors (SRs), including class A SR (SR-A) and CD36, are responsible for the internalization of oxLDL. In contrast, receptors for reverse cholesterol transport, including ABCA1 and ABCG1, mediate the efflux of cholesterol from macrophage foam cells...
January 3, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29297151/liver-x-receptor-agonist-gw3965-regulates-synaptic-function-upon-amyloid-beta-exposure-in-hippocampal-neurons
#10
C Báez-Becerra, F Filipello, A Sandoval-Hernández, H Arboleda, G Arboleda
Alzheimer's disease (AD) is a devastating neurodegenerative disease characterized by beta-amyloid (Aβ) accumulation and neurofibrillary tangles formation in the brain which are associated to synaptic deficits and dementia. Liver X receptor (LXR) agonists have been demonstrated to revert of pathologic and cognitive defects in murine models of AD through the regulation of Apolipoprotein E, ATP-Binding Cassette A1 (ABCA1), by dampening neuroinflammation and also by reducing the levels of amyloid-β (Aβ) accumulation in the brain...
January 3, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29295819/the-abc-transporter-eato-promotes-cell-clearance-in-the-drosophila-melanogaster-ovary
#11
Clarissa S Santoso, Tracy L Meehan, Jeanne S Peterson, Tiara M Cedano, Christopher V Turlo, Kimberly McCall
The clearance of dead cells is a fundamental process in maintaining tissue homeostasis. Genetic studies in Drosophila melanogaster, Caenorhabditis elegans, and mammals have identified two evolutionarily conserved signaling pathways that act redundantly to regulate this engulfment process: the ced-1/-6/-7 and ced-2/-5/-12 pathways. Of these engulfment genes, only the ced-7/ABCA1 ortholog remains to be identified in D. melanogaster Homology searches revealed a family of putative ced-7/ABCA1 homologs encoding ABC transporters in D...
January 2, 2018: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29290792/therapeutic-effects-of-targeted-ppar%C3%A9-activation-on-inflamed-high-risk-plaques-assessed-by-serial-optical-imaging-in-vivo
#12
Jah Yeon Choi, Jiheun Ryu, Hyun Jung Kim, Joon Woo Song, Joo Hee Jeon, Dae-Hee Lee, Dong Joo Oh, Dae-Gab Gweon, Wang-Yuhl Oh, Hongki Yoo, Kyeongsoon Park, Jin Won Kim
Rationale: Atherosclerotic plaque is a chronic inflammatory disorder involving lipid accumulation within arterial walls. In particular, macrophages mediate plaque progression and rupture. While PPARγ agonist is known to have favorable pleiotropic effects on atherogenesis, its clinical application has been very limited due to undesirable systemic effects. We hypothesized that the specific delivery of a PPARγ agonist to inflamed plaques could reduce plaque burden and inflammation without systemic adverse effects...
2018: Theranostics
https://www.readbyqxmd.com/read/29289296/identification-of-differentially-expressed-genes-response-to-tcdd-in-rat-brain-after-long-term-low-dose-exposure
#13
Yangsheng Chen, Li Xu, Heidi Q H Xie, Tuan Xu, Hualing Fu, Songyan Zhang, Rui Sha, Yingjie Xia, Bin Zhao
Several cohort studies have reported that dioxin and dioxin-like polychlorinated biphenyls might impair the nervous system and lead to neurological or neurodegenerative diseases in the elder people, but there is limited research on the involved mechanism. By using microarray analysis, we figured out the differentially expressed genes between brain samples from SD rats after low-dose (0.1μg/(kg▪bw)) dioxin exposure for six months and controls. To investigate the function changes in the course of dioxin exposure, Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed on the differentially expressed genes...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29287777/tanshindiol-c-inhibits-oxidized-low-density-lipoprotein-induced-macrophage-foam-cell-formation-via-peroxiredoxin-1-dependent-pathway
#14
Yuyu Yang, Xueyan Li, Liying Peng, Lin An, Ningyuan Sun, Xuewen Hu, Ping Zhou, Yong Xu, Ping Li, Jun Chen
NF-E2-related factor 2 (Nrf2) has been shown to be protective in atherosclerosis. The loss of Nrf2 in macrophages enhances foam cell formation and promotes early atherogenesis. Tanshindiol C (Tan C) is isolated from the root of Salvia miltiorrhiza Bge., a traditional Chinese medicine that has been used for the treatment of several cardiovascular diseases for many years. This study was aimed to test the potential role of Tan C against macrophage foam cell formation and to explore the underlying mechanism. Firstly, we observed that Tan C markedly suppressed oxidized low-density lipoprotein (oxLDL) induced macrophage foam cell formation...
December 26, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29286833/liver-x-receptors-activation-attenuates-ischemia-reperfusion-injury-of-liver-graft-in-rats
#15
Ming-Xiang Cheng, Ping Huang, Qiang He, Yong Chen, Jin-Zheng Li
PURPOSE: Suppression of the Toll like receptor 4 (TLR4)-nuclear factor-κB (NF-κB) signaling was critical in protection against liver IRI. Previous studies revealed that Liver X receptors (LXRs) activation could antagonize TLR4-NF-κB signaling. The purpose of this study is to determine whether LXRs agonist GW3965 can suppress the TLR4-NF-κB signaling during liver transplantation and protect ischemia-reperfusion injury (IRI). MATERIALS AND METHODS: Sprague Dawley (SD) rats were used to perform orthotropic liver transplantation...
December 29, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/29285103/effects-of-sepsis-on-the-metabolism-of-sphingomyelin-and-cholesterol-in-mice-with-liver-dysfunction
#16
Jiaqi Li, Kun Xia, Mingdi Xiong, Xi Wang, Nianlong Yan
Sepsis is characterized by a severe inflammatory response to infection. With the spread of sepsis, various tissues, including the lungs, liver and kidney, may be damaged. This may finally develop into multiple organ dysfunction syndrome. Sphingomyelin and cholesterol are two main lipids involved in sepsis. The metabolism of sphingomyelin and cholesterol in the livers of mice with sepsis needs to be clarified. To achieve this, the present study intraperitoneally injected mice with PBS, lipopolysaccharide (LPS; 10 mg/kg) and LPS + pyrrolidine dithiocarbamate (PDTC; 30 mg/kg)...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29284608/melanocortin-1-receptor-deficiency-promotes-atherosclerosis-in-apolipoprotein-e-mice
#17
Petteri Rinne, James J Kadiri, Mauricio Velasco-Delgado, Salla Nuutinen, Miro Viitala, Maija Hollmén, Martina Rami, Eriika Savontaus, Sabine Steffens
OBJECTIVE: The MC1-R (melanocortin 1 receptor) is expressed by monocytes and macrophages where it mediates anti-inflammatory actions. MC1-R also protects against macrophage foam cell formation primarily by promoting cholesterol efflux through the ABCA1 (ATP-binding cassette transporter subfamily A member 1) and ABCG1 (ATP-binding cassette transporter subfamily G member 1). In this study, we aimed to investigate whether global deficiency in MC1-R signaling affects the development of atherosclerosis...
December 28, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29281244/high-density-lipoprotein-nanobiologics-for-precision-medicine
#18
Willem J M Mulder, Mandy M T van Leent, Marnix Lameijer, Edward A Fisher, Zahi A Fayad, Carlos Pérez-Medina
Nature is an inspirational source for biomedical engineering developments. Particularly, numerous nanotechnological approaches have been derived from biological concepts. For example, among many different biological nanosized materials, viruses have been extensively studied and utilized, while exosome research has gained much traction in the 21st century. In our body, fat is transported by lipoproteins, intriguing supramolecular nanostructures that have important roles in cell function, lipid metabolism, and disease...
December 27, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29275178/central-administration-of-coagonist-of-glp-1-and-glucagon-receptors-improves-dyslipidemia
#19
Vishal Patel, Amit Joharapurkar, Samadhan Kshirsagar, Brijesh Sutariya, Maulik Patel, Hiren Patel, Dheerendra Pandey, Dipam Patel, Rajesh Bahekar, Mukul Jain
Coagonists of Glucagon-like peptide-1 (GLP-1) and glucagon receptors are under clinical investigation for treatment of obesity associated with diabetes. In addition to their role in glucose homeostasis, GLP-1 and glucagon modulate lipid metabolism. In this study, we have investigated the role of central GLP-1 receptor (GLP-1R) and glucagon receptor (GCGR) activation in regulation of lipid metabolism in cholesterol-fed hamsters. Hamsters were treated with coagonist alone (0.3 μg) or in combination with either GLP-1R antagonist (0...
December 21, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29259301/global-inactivation-of-carboxylesterase-1-ces1-ces1g-protects-against-atherosclerosis-in-ldlr-mice
#20
Jiesi Xu, Yang Xu, Yanyong Xu, Liya Yin, Yanqiao Zhang
Atherosclerotic cardiovascular disease is a leading cause of death in the western world. Increased plasma triglyceride and cholesterol levels are major risk factors for this disease. Carboxylesterase 1 (Ces1/Ces1g) has been shown to play a role in metabolic control. So far, the role of mouse Ces1/Ces1g deficiency in atherosclerosis is not elucidated. We generated Ces1/Ces1g -/- mice. Compared to wild-type mice, Ces1/Ces1g -/- mice had reduced plasma cholesterol levels. We then generated Ces1g -/- Ldlr -/- double knockout (DKO) mice, which were fed a Western diet for 16 weeks...
December 19, 2017: Scientific Reports
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