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https://www.readbyqxmd.com/read/28726269/previous-physical-exercise-alters-hepatic-profile-of-oxidative-inflammatory-status-and-limits-the-secondary-brain-damage-induced-by-severe-tbi-in-rats
#1
Mauro Robson Torres de Castro, Ana Paula de Oliveira Ferreira, Guilherme Lago Busanello, Luís Roberto Hart da Silva, Mauro Eduardo Porto da Silveira Junior, Fernando Fiorin, Gabriela Arrifano, Maria Elena Crespo López, Rômulo Pillon Barcelos, María J Cuevas, Guilherme Bresciani, Javier González-Gallego, Michele Rechia Fighera, Luiz Fernando Freire Royes
Although systemic responses have been described after traumatic brain injury (TBI), little is known regarding potential interactions between brain and peripheral organs after neuronal injury. In this sense, we decided to investigate whether peripheral oxidative/inflammatory response contributes to the neuronal dysfunction after TBI as well as prophylactic role of exercise training. Animals were submitted to fluid percussion injury (FPI) after 6 weeks of swimming training. Previous exercise training increased mRNA expression of X receptor alpha (LXR-α), ATP-binding cassette transporter (ABCA1), and decreased inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor alpha (TNF-α) and interleukin (IL)-6 expression per se in liver...
July 20, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28725889/cholesterol-lowering-by-pediococcus-acidilactici-lab4-and-lactobacillus-plantarum-lab12-in-adult-zebrafish-is-associated-with-improved-memory-and-involves-an-interplay-between-npc1l1-and-abca1
#2
Fei Tieng Lim, Siong Meng Lim, Kalavathy Ramasamy
This study assessed the cholesterol lowering effect of Pediococcus acidilactici LAB4 and Lactobacillus plantarum LAB12 using adult zebrafish. Animals were fed with a high cholesterol diet (HCD) with/without LAB for seven weeks. Serum and liver cholesterol was quantified using colorimetric and dye staining methods. Expressions of npc1l1 and abca1 in the liver and intestine and appa in the brain were quantified using RT-PCR. Serum and liver cholesterol was significantly lowered in LAB4- and LAB12-fed zebrafish (≤64% and ≤71%, respectively), with reduced liver cholesterol deposition...
July 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28710789/atr-101-inhibits-cholesterol-efflux-and-cortisol-secretion-by-abc-transporters-causing-cytotoxic-cholesterol-accumulation-in-adrenocortical-carcinoma-cells
#3
Veronica Elizabeth Burns, Tom Klaus Kerppola
BACKGROUND AND PURPOSE: To further the development of new agents for the treatment of adrenocortical carcinoma (ACC), we characterized the molecular and cellular mechanisms of cytotoxicity by the adrenalytic compound ATR-101 (PD132301-02). EXPERIMENTAL APPROACH: We compared the effects of ATR-101, PD129337, and ABC transporter inhibitors, on cholesterol accumulation and efflux, on cortisol secretion, on ATP levels, and on caspase activation in ACC-derived cell lines...
July 14, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28706492/lower-expression-of-slc27a1-enhances-intramuscular-fat-deposition-in-chicken-via-down-regulated-fatty-acid-oxidation-mediated-by-cpt1a
#4
Fengfang Qiu, Liang Xie, Jing-E Ma, Wen Luo, Li Zhang, Zhe Chao, Shaohao Chen, Qinghua Nie, Zhemin Lin, Xiquan Zhang
Intramuscular fat (IMF) is recognized as the predominant factor affecting meat quality due to its positive correlation with tenderness, juiciness, and flavor. Chicken IMF deposition depends on the balance among lipid synthesis, transport, uptake, and subsequent metabolism, involving a lot of genes and pathways, however, its precise molecular mechanisms remain poorly understood. In the present study, the breast muscle tissue of female Wenchang chickens (WC) (higher IMF content, 1.24 in D120 and 1.62 in D180) and female White Recessive Rock chickens (WRR; lower IMF content, 0...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28704619/advanced-glycation-end-products-affect-cholesterol-homeostasis-by-impairing-abca1-expression-on-macrophages
#5
Olivier Kamtchueng Simo, Souade Ikhlef, Hicham Berrougui, Abdelouahed Khalil
Reverse cholesterol transport (RCT), which is intimately linked to high-density lipoproteins (HDLs), plays a key role in cholesterol homeostasis and the prevention of atherosclerosis. The goal of the present study was to investigate the effect of aging and advanced glycation end products (AGEs) on RCT as well as on other factors that may affect this anti-atherogenic property of HDLs. The transfer of macrophage-derived cholesterol to the plasma and liver and then to the feces for elimination was significantly lower in aged mice than in young mice...
July 13, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28701354/pleiotropic-effects-of-apolipoprotein-c3-on-hdl-functionality-and-adipose-tissue-metabolic-activity
#6
Evangelia Zvintzou, Marie Lhomme, Stella Chasapi, Serafoula Filou, Vassilis Theodoropoulos, Eva Xepapadaki, Anatol Kontush, George Spyroulias, Constantinos C Tellis, Alexandros D Tselepis, Caterina Constantinou, Kyriakos E Kypreos
Apolipoprotein C3 (APOC3) is produced mainly by the liver and intestine and approximately half of plasma APOC3 associates with HDL. Though it was believed that APOC3 associates with HDL by simple binding to pre-existing particles, recent data support that biogenesis of APOC3-containing HDL (APOC3-HDL) requires Abca1. Moreover, APOC3-HDL contributes to plasma triglyceride homeostasis, by preventing APOC3 association with triglyceride-rich lipoproteins. Interestingly, APOC3-HDL also shows positive correlation with the morbidly obese phenotype...
July 12, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28700834/petroleum-ether-extract-of-njavara-rice-bran-upregulates-jak2-stat3-mediated-anti-inflammatory-profile-in-macrophages-and-aortic-endothelial-cells-promoting-regression-of-atherosclerosis
#7
Chithra K Pushpan, Jayalekshmy Ananthasankaran, Helen Antony
"Njavara"(Oryza sativa Linn) is a unique rice variety grown in Kerala that is reported to have significantly higher antioxidant, anti-inflammatory, chemical indices, and bioactive components compared with staple rice varieties. However, the role of NBE in reversing the atherosclerosis development remains unclear. The present study aimed to elucidate the role of Njavara rice bran petroleum ether extract (NBE) in promoting atherosclerotic regression. Male New Zealand white breed rabbits were divided into three groups...
July 12, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28695802/effect-of-ganoderma-lucidum-preparation-on-the-behavior-biochemistry-and-autoimmune-parameters-of-mouse-models-of-app-ps1-double-transgenic-alzheimer-s-disease
#8
Chuan Qin, Shanqiu Wu, Baosheng Chen, Xiaoxian Wu, Kunyao Qu, Junmin Liu, Guifang Zhang, Yanfeng Xu, Shunli Shu, Lihua Sun, Yanhong Li, Hua Zhu, Lan Huang, Chunmei Ma, Yuhuan Xu, Yunlin Han, Yaozeng Lu
Objective To evaluate the efficacy of Ganoderma lucidum preparation on the behaviors,biochemistry,and autoimmunity parameters of mouse models of APP/PS-1 double transgenic Alzheimer's disease(AD).Methods A total of 44 4-month-old APP/PS-1 double transgenic AD mice were randomly divided into AD model group,Aricept group,Ganoderma lucidum middle-dose(LZ-M)group,and Ganoderma lucidum high-dose(LZ-H)group,with 11 mice in each group.In addition,10 4-month-old C57BL/6 mice were used as the control group.Water maze test was conducted to observe the behavior changes,and the protein expressions in brain tissues were detected by Western blot analysis...
June 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28694219/hepatic-abca1-deficiency-is-associated-with-delayed-apolipoprotein-b-secretory-trafficking-and-augmented-vldl-triglyceride-secretion
#9
Mingxia Liu, Soonkyu Chung, Gregory S Shelness, John S Parks
ATP binding cassette transporter A1 (ABCA1) is a membrane transporter that facilitates nascent HDL formation. Tangier disease subjects with complete ABCA1 deficiency have <5% of normal levels of plasma HDL, elevated triglycerides (TGs), and defective vesicular trafficking in fibroblasts and macrophages. Hepatocyte-specific ABCA1 knockout mice (HSKO) have a similar lipid phenotype with 20% of normal plasma HDL levels and a two-fold elevation of plasma TGs due to hepatic overproduction of large, triglyceride-enriched VLDL...
July 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28690119/cholesterol-lowering-effect-of-aralia-elata-miq-seem-via-the-activation-of-srebp-2-and-the-ldl-receptor
#10
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/28673011/tribbles-homolog-1-enhances-cholesterol-efflux-from-oxidized-low-density-lipoprotein-loaded-thp-1-macrophages
#11
Yanhua Fu, Yang Zhao, Bin Huang
Macrophage foam cell formation plays a pivotal role in the pathogenesis of atherosclerosis. The protein Tribbles homolog 1 (Trib1), a member of the Tribbles protein family, functions as an adaptor or scaffold protein. Recent studies have indicated its implication in lipoprotein metabolism. In the present study, the role of Trib1 in macrophage foam cell formation was investigated. Oil red O staining was used to analyze intracellular lipid deposition, while the effects of Trib1 overexpression on cholesterol efflux were also examined...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28666268/myeloid-specific-genetic-ablation-of-atp-binding-cassette-transporter-abca1-is-protective-against-cancer
#12
Maryam Zamanian-Daryoush, Daniel J Lindner, Joseph A DiDonato, Matthew Wagner, Jennifer Buffa, Patricia Rayman, John S Parks, Marit Westerterp, Alan R Tall, Stanley L Hazen
Increased circulating levels of apolipoprotein A-I (apoA-I), the major protein of high-density lipoprotein (HDL), by genetic manipulation or infusion, protects against melanoma growth and metastasis. Herein, we explored potential roles in melanoma tumorigenesis for host scavenger receptor class B, type 1 (SR-B1), and ATP-binding cassette transporters A1 (ABCA1) and G1 (ABCG1), all mediators of apoA-I and HDL sterol and lipid transport function. In a syngeneic murine melanoma tumor model, B16F10, mice with global deletion of SR-B1 expression exhibited increased plasma HDL cholesterol (HDLc) levels and decreased tumor volume, indicating host SR-B1 does not directly contribute to HDL-associated anti-tumor activity...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28660384/increased-hepatic-abca1-transporter-is-associated-with-hypercholesterolemia-in-a-cholestatic-rat-model-and-primary-biliary-cholangitis-patients
#13
Yasuaki Takeyama, Yuko Uehara, Akira Anan, Daisuke Morihara, Keiji Yokoyama, Kazuhide Takata, Takashi Tanaka, Makoto Irie, Kaoru Iwata, Satoshi Shakado, Tetsuro Sohda, Shotaro Sakisaka
Hepatic ATP-binding cassette A1 (ABCA1) transporter is the modulator of intrahepatic cholesterol levels via the efflux of cholesterol into plasma. This study aimed to determine the expression of hepatic ABCA1 levels in a cholestatic rat model and patients with primary biliary cholangitis (PBC). A cholesterol efflux study was conducted with Abca1 knock down using siRNA in WIF9 cells. Cholesterol levels in the ABCA1 siRNA cells in the medium were significantly decreased compared with those in controls (P < 0...
June 28, 2017: Medical Molecular Morphology
https://www.readbyqxmd.com/read/28659806/erythrodiol-an-olive-oil-constituent-increases-the-half-life-of-abca1-and-enhances-cholesterol-efflux-from-thp-1-derived-macrophages
#14
Limei Wang, Sarah Wesemann, Liselotte Krenn, Angela Ladurner, Elke H Heiss, Verena M Dirsch, Atanas G Atanasov
Cholesterol efflux (ChE) from macrophages is an initial step of reverse cholesterol transport (RCT). The ATP-binding cassette transporter A1 (ABCA1) is a key transporter for ChE and its increased expression is regarded to attenuate atherosclerosis. Thus, the identification and characterization of molecules raising ABCA1 and thereby stimulating ChE is of pharmacological relevance. In this study, we tested dietary compounds from olive oil for their capacity of enhancing cellular ABCA1 protein level. We identified erythrodiol (Olean-12-ene-3β,28-diol) as an ABCA1 stabilizer and revealed its positive influence on ChE in THP-1-derived human macrophages...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28656081/effect-of-rosiglitazone-on-amyloid-precursor-protein-processing-and-a%C3%AE-clearance-in-streptozotocin-induced-rat-model-of-alzheimer-s-disease
#15
Li Wang, Wei Liu, Ying Fan, Tingting Liu, Chunjiang Yu
OBJECTIVES: Increasing evidence suggests that Alzheimer's disease (AD) is associated with diabetes. Rosiglitazone, a peroxisome proliferator-activated receptor γ (PPAR-γ) agonist and anti-diabetic agent, may improve symptoms of AD. However, the underlying therapeutic potential of it has not been fully elucidated. MATERIALS AND METHODS: Rats were divided into four groups: control group, sham operated group, Streptozotocin (STZ) group, rosiglitazone (RGZ) group...
May 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28655204/trak2-a-novel-regulator-of-abca1-expression-cholesterol-efflux-and-hdl-biogenesis
#16
Nicole J Lake, Rachael L Taylor, Hugh Trahair, K N Harikrishnan, Joanne E Curran, Marcio Almeida, Hemant Kulkarni, Nigora Mukhamedova, Anh Hoang, Hann Low, Andrew J Murphy, Matthew P Johnson, Thomas D Dyer, Michael C Mahaney, Harald H H Göring, Eric K Moses, Dmitri Sviridov, John Blangero, Jeremy B M Jowett, Kiymet Bozaoglu
Aims: The recent failures of HDL-raising therapies have underscored our incomplete understanding of HDL biology. Therefore there is an urgent need to comprehensively investigate HDL metabolism to enable the development of effective HDL-centric therapies. To identify novel regulators of HDL metabolism, we performed a joint analysis of human genetic, transcriptomic, and plasma HDL-cholesterol (HDL-C) concentration data and identified a novel association between trafficking protein, kinesin binding 2 (TRAK2) and HDL-C concentration...
June 26, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28648695/the-usefulness-of-advanced-lipid-and-oxidative-stress-testing-for-diagnosis-and-management-of-low-hdl-cholesterol-phenotype-a-case-report
#17
Vladimir Kuburovic, Jelena Vekic, Aleksandra Zeljkovic, Alain Carrie, Jelena Kotur-Stevuljevic, Dragana Bojanin, Jovan Kosutic, Vesna Spasojevic-Kalimanovska, Milica Miljkovic, Nina Kuburovic, Philippe Couvert
OBJECTIVE: Plasma high-density lipoprotein cholesterol (HDL-C) level is a strong inverse predictor of cardiovascular disease (CVD) development. Tangier disease, a consequence of mutations in the ATP binding cassette transporter 1 (ABCA1) gene, is associated with very low HDL-C levels. Still, the relationship between Tangier disease and CVD is not always evident. The study investigates usefulness of lipoprotein subfractions, oxidative stress and paraoxonase 1 (PON1) status assessment for evaluation and management of patient with low HDL-C phenotype...
June 22, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28646516/tofacitinib-restores-the-inhibition-of-reverse-cholesterol-transport-induced-by-inflammation-understanding-the-lipid-paradox-associated-with-rheumatoid-arthritis
#18
S Pérez-Baos, J I Barrasa, P Gratal, A Larrañaga-Vera, I Prieto-Potin, G Herrero-Beaumont, R Largo
BACKGROUND AND PURPOSE: Patients with active rheumatoid arthritis (RA) have increased cardiovascular mortality, paradoxically associated with reduced circulating lipid levels. The Janus kinase (Jak) inhibitor tofacitinib ameliorates systemic and joint inflammation in RA with a concomitant increase in serum lipids. We analyzed the effect of tofacitinib on the lipid profile of hyperlipidemic rabbits with chronic arthritis (CA) and on the regulation of reverse cholesterol transport (RCT) during chronic inflammation...
June 23, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28644829/swapping-the-n-and-c-terminal-domains-of-human-apolipoprotein-e3-and-ai-reveals-insights-into-their-structure-activity-relationship
#19
Mark T Lek, Siobanth Cruz, Nnejiuwa U Ibe, Wendy H J Beck, John K Bielicki, Paul M M Weers, Vasanthy Narayanaswami
Apolipoprotein (apo) E3 and apoAI are exchangeable apolipoproteins that play a dominant role in regulating plasma lipoprotein metabolism. ApoE3 (299 residues) is composed of an N-terminal (NT) domain bearing a 4-helix bundle and a C-terminal (CT) domain bearing a series of amphipathic α-helices. ApoAI (243 residues) also comprises a highly helical NT domain and a less structured CT tail. The objective of this study was to understand their structural and functional role by generating domain swapped chimeras: apoE3-NT/apoAI-CT and apoAI-NT/apoE-CT...
2017: PloS One
https://www.readbyqxmd.com/read/28642575/reactive-astrocytes-function-as-phagocytes-after-brain-ischemia-via-abca1-mediated-pathway
#20
Yosuke M Morizawa, Yuri Hirayama, Noubuhiko Ohno, Shinsuke Shibata, Eiji Shigetomi, Yang Sui, Junichi Nabekura, Koichi Sato, Fumikazu Okajima, Hirohide Takebayashi, Hideyuki Okano, Schuichi Koizumi
Astrocytes become reactive following various brain insults; however, the functions of reactive astrocytes are poorly understood. Here, we show that reactive astrocytes function as phagocytes after transient ischemic injury and appear in a limited spatiotemporal pattern. Following transient brain ischemia, phagocytic astrocytes are observed within the ischemic penumbra region during the later stage of ischemia. However, phagocytic microglia are mainly observed within the ischemic core region during the earlier stage of ischemia...
June 22, 2017: Nature Communications
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