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ampk regulation of fatty acids

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https://www.readbyqxmd.com/read/28088385/flavonoid-derivative-fla-cn-inhibited-adipocyte-differentiation-via-activating-ampk-and-up-regulating-microrna-27-in-3t3-l1-cells
#1
Chun-Chun Gan, Tian-Wen Ni, Yang Yu, Nan Qin, Ying Chen, Mei-Na Jin, Hong-Quan Duan
Fla-CN (3-O-[(E)-4-(4-cyanophenyl)-2-oxobut-3-en-1-yl] kaempferol) is a semi-synthesized flavonoid derivative of tiliroside which exhibited anti-diabetic effect in vivo. Our previous study revealed the role of Fla-CN in anti-obesity and anti-diabetes in vivo, but the underlying mechanism remained to be addressed. The present study aimed to investigate the mechanism of anti-adipogenesis in vitro. Fla-CN markedly inhibited intracellular lipid accumulation in a dose-dependent manner, and the inhibitory effect was mainly limited to the early stage of adipocyte differentiation in vitro...
January 11, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28076367/a-chemogenomic-screen-reveals-novel-snf1p-ampk-independent-regulators-of-acetyl-coa-carboxylase
#2
Bruno L Bozaquel-Morais, Juliana B Madeira, Thiago M Venâncio, Thiago Pacheco-Rosa, Claudio A Masuda, Monica Montero-Lomeli
Acetyl-CoA carboxylase (Acc1p) is a key enzyme in fatty acid biosynthesis and is essential for cell viability. To discover new regulators of its activity, we screened a Saccharomyces cerevisiae deletion library for increased sensitivity to soraphen A, a potent Acc1p inhibitor. The hits identified in the screen (118 hits) were filtered using a chemical-phenotype map to exclude those associated with pleiotropic drug resistance. This enabled the identification of 82 ORFs that are genetic interactors of Acc1p. The main functional clusters represented by these hits were "transcriptional regulation", "protein post-translational modifications" and "lipid metabolism"...
2017: PloS One
https://www.readbyqxmd.com/read/28074608/aged-garlic-extract-suppresses-the-increase-of-plasma-glycated-albumin-level-and-enhances-the-amp-activated-protein-kinase-in-adipose-tissue-in-tsod-mice
#3
Satomi Miki, Ken-Ichi Inokuma, Miyuki Takashima, Mitsuho Nishida, Yoko Sasaki, Mitsuyasu Ushijima, Jun-Ichiro Suzuki, Naoaki Morihara
SCOPE: In this study, we investigated the effect of aged garlic extract (AGE) on the high level of blood glucose in Tsumura Suzuki Obese-Diabetes (TSOD) mice. METHODS AND RESULTS: TSOD mice were fed standard diet with or without 2% AGE for 19 weeks. AGE treatment lowered the blood glucose level and significantly reduced the plasma level of glycated albumin in TSOD mice as compared with those without AGE treatment. In addition, AGE treatment increased the level of phosphorylated AMP-activated protein kinase (AMPK) in the adipose tissue, liver and muscle that played an important role in the maintenance of insulin sensitivity...
January 11, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28069379/ndrg2-overexpression-suppresses-hepatoma-cells-survival-during-metabolic-stress-through-disturbing-the-activation-of-fatty-acid-oxidation
#4
Tao Pan, Mei Zhang, Fang Zhang, Guang Yan, Yi Ru, Qinhao Wang, Yao Zhang, Xuehui Wei, Xinyuan Xu, Lan Shen, Jian Zhang, Kaichun Wu, Libo Yao, Xia Li
Because of the high nutrient consumption and inadequate vascularization, solid tumor constantly undergoes metabolic stress during tumor development. Oncogenes and tumor suppressor genes participated in cancer cells' metabolic reprogramming. N-Myc downstream regulated gene 2 (NDRG2) is a recently identified tumor suppressor gene, but its function in cancer metabolism, particularly during metabolic stress, remains unclear. In this study, we found that NDRG2 overexpression significantly reduced hepatoma cell proliferation and enhanced cell apoptosis under glucose limitation...
January 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28067405/lkb1-regulation-of-skeletal-muscle-development-metabolism-and-muscle-progenitor-cell-homeostasis
#5
REVIEW
Tizhong Shan, Ziye Xu, Jiaqi Liu, Weiche Wu, Yizhen Wang
Liver kinase B1 (Lkb1), also named as Serine/Threonine protein kinase 11 (STK11), is a serine/threonine kinase that plays crucial roles in various cellular processes including cell survival, cell division, cellular polarity, cell growth, cell differentiation, and cell metabolism. In metabolic tissues, Lkb1 regulates glucose homeostasis and energy metabolism through phosphorylating and activating the AMPK subfamily proteins. In skeletal muscle, Lkb1 affects muscle development and postnatal growth, lipid and fatty acid oxidation, glucose metabolism and insulin sensitivity...
January 9, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28038998/activation-of-ampk-by-berberine-induces-hepatic-lipid-accumulation-by-upregulation-of-fatty-acid-translocase-cd36-in-mice
#6
You-Jin Choi, Kang-Yo Lee, Seung-Hwan Jung, Hyung Sik Kim, Gayong Shim, Mi-Gyeong Kim, Yu-Kyoung Oh, Seon-Hee Oh, Dae Won Jun, Byung-Hoon Lee
Emerging evidence has shown that berberine has a protective effect against metabolic syndrome such as obesity and type II diabetes mellitus by activating AMP-activated protein kinase (AMPK). AMPK induces CD36 trafficking to the sarcolemma for fatty acid uptake and oxidation in contracting muscle. However, little is known about the effects of AMPK on CD36 regulation in the liver. We investigated whether AMPK activation by berberine affects CD36 expression and fatty acid uptake in hepatocytes and whether it is linked to hepatic lipid accumulation...
December 28, 2016: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28034771/lkb1-promotes-metabolic-flexibility-in-response-to-energy-stress
#7
Seth J Parker, Robert U Svensson, Ajit S Divakaruni, Austin E Lefebvre, Anne N Murphy, Reuben J Shaw, Christian M Metallo
The Liver Kinase B1 (LKB1) tumor suppressor acts as a metabolic energy sensor to regulate AMP-activated protein kinase (AMPK) signaling and is commonly mutated in various cancers, including non-small cell lung cancer (NSCLC). Tumor cells deficient in LKB1 may be uniquely sensitized to metabolic stresses, which may offer a therapeutic window in oncology. To address this question we have explored how functional LKB1 impacts the metabolism of NSCLC cells using (13)C metabolic flux analysis. Isogenic NSCLC cells expressing functional LKB1 exhibited higher flux through oxidative mitochondrial pathways compared to those deficient in LKB1...
December 26, 2016: Metabolic Engineering
https://www.readbyqxmd.com/read/28012395/regulatory-mechanism-of-mineral-balanced-deep-sea-water-on-hypocholesterolemic-effects-in-hepg2-hepatic-cells
#8
Kyu-Shik Lee, Yun-Suk Kwon, Soyoung Kim, Deok-Soo Moon, Hyeon Ju Kim, Kyung-Soo Nam
Several previous studies have shown the benefits of deep sea water (DSW) in lipid metabolism. However, the effects of DSW on cellular cholesterol accumulation and synthesis induced by high glucose or free fatty acid plus high glucose [4.5g/L] (FFA/glucose) have not been fully elucidated to date. Herein, we showed the effects of mineral-balanced DSW [magnesium (Mg):calcium (Ca)=3:1] (MB-DSW) on cholesterol metabolism induced by high glucose or FFA/glucose in HepG2 hepatic cells. Moreover, the effects of high ratio Mg DSW [Mg:Ca=40:1] (Mg40) were also investigated...
December 21, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28012135/eicosapentaenoic-acid-enriched-phosphatidylcholine-attenuated-hepatic-steatosis-through-regulation-of-cholesterol-metabolism-in-rats-with-nonalcoholic-fatty-liver-disease
#9
Yanjun Liu, Di Shi, Yingying Tian, Yuntao Liu, Qiping Zhan, Jie Xu, Jingfeng Wang, Changhu Xue
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in the world. Disturbed cholesterol metabolism plays a crucial role in the development of NAFLD. The present study was conducted to evaluate the effects of EPA-PC extracted from sea cucumber on liver steatosis and cholesterol metabolism in NAFLD. Male Wistar rats were randomly divided into seven groups (normal control group, model group, lovastatin group, low- and high-dose EPA groups, and low- and high-dose EPA-PC groups). Model rats were established by administering a diet containing 1% orotic acid...
December 24, 2016: Lipids
https://www.readbyqxmd.com/read/27997977/regulation-of-hepatocellular-fatty-acid-uptake-in-mouse-models-of-fatty-liver-disease-with-and-without-functional-leptin-signaling-roles-of-nfkb-and-srebp-1c-and-the-effects-of-spexin
#10
Jasmine F Ge, J L Walewski, D Anglade, P D Berk
The processes causing increased hepatic triglycerides (TGs) in mouse models of hepatic steatosis (HS) due to high fat diet (HFD)-induced obesity (DIO), EtOH consumption, or obesity mutations (ob/ob, db/db) are uncertain. This report summarizes two studies. Study 1 focused on regulation by five transcription factors (TFs) (NfKb, Srebp-lc, AMPK, PPARα, PPARγ) of seven, much-studied hepatic long-chain fatty acid (LCFA) transporters (FABPpm, CD36, FATPl, FATP2, FATP4, FATP5, & Caveolin-1 [CAV-1]), and expression of genes for enzymes of LCFA synthesis (SCD-1, FASN) in mice with HS from various causes...
September 2016: Seminars in Liver Disease
https://www.readbyqxmd.com/read/27981809/chicoric-acid-attenuate-a-nonalcoholic-steatohepatitis-by-inhibiting-key-regulators-of-lipid-metabolism-fibrosis-oxidation-and-inflammation-in-mice-with-methionine-and-choline-deficiency
#11
Myungsuk Kim, GyHye Yoo, Ahmad Randy, Hyoung Seok Kim, Chu Won Nho
SCOPE: Nonalcoholic fatty liver diseases (NAFLD) range histopathologically from hepatic steatosis to steatohepatitis. Chicoric acid has beneficial effects on obesity and liver injury, but its effects on nonalcoholic steatohepatitis (NASH) have not yet been determined. This study examined the effects of Crepidiastrum denticulatum extract (CDE) and its active compound chicoric acid in a mouse model of NASH and fibrosis. METHODS: CDE and chicoric acid were orally administrated to mice fed a methionine- and choline-deficient (MCD) diet...
December 16, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/27932556/orally-administered-berberine-modulates-hepatic-lipid-metabolism-by-altering-microbial-bile-acid-metabolism-and-the-intestinal-fxr-signaling-pathway
#12
Runbin Sun, Na Yang, Bo Kong, Bei Cao, Dong Feng, Xiaoyi Yu, Chun Ge, Jingqiu Huang, Jianliang Shen, Pei Wang, Siqi Feng, Fei Fei, Jiahua Guo, Jun He, Nan Aa, Qiang Chen, Yang Pan, Justin D Schumacher, Chung S Yang, Grace L Guo, Jiye Aa, Guangji Wang
Previous studies suggest that the lipid-lowering effect of BBR involves actions on the LDL receptor and the AMPK signaling pathways. However, the implication of these mechanisms is unclear because of the low bioavailability of BBR. Because the main action site of BBR is the gut and intestinal FXR plays a pivotal role in the regulation of lipid metabolism, we hypothesized that the effects of BBR on intestinal FXR signaling pathway might account for its pharmacological effectiveness. Using wild type (WT) and intestine-specific FXR knockout (FXRint-/-) mice, we found that BBR prevented the development of high-fat-diet induced obesity and ameliorated triglyceride accumulation in livers of WT, but not FXRint-/- mice...
December 8, 2016: Molecular Pharmacology
https://www.readbyqxmd.com/read/27902927/antidiabetic-activity-of-ganoderma-lucidum-polysaccharides-f31-down-regulated-hepatic-glucose-regulatory-enzymes-in-diabetic-mice
#13
Chun Xiao, Qingping Wu, Jumei Zhang, Yizhen Xie, Wen Cai, Jianbin Tan
ETHNOPHARMACOLOGICAL RELEVANCE: Ganoderma lucidum (Lin Zhi) has been used to treat diabetes in Chinese folk for centuries. Our laboratory previously demonstrated that Ganoderma lucidum polysaccharides (GLPs) had hypoglycemic effects in diabetic mice. Our aim was to identify the main bioactives in GLPs and corresponding mechanism of action. MATERIALS AND METHODS: Four polysaccharide-enriched fraction were isolated from GLPs and the antidiabetic activities were evaluated by type 2 diabetic mice...
January 20, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27893782/beneficial-effects-of-metformin-and-or-salicylate-on-palmitate-or-tnf%C3%AE-induced-neuroinflammatory-marker-and-neuropeptide-gene-regulation-in-immortalized-npy-agrp-neurons
#14
Wenqing Ye, Ernesto H Ramos, Brian C Wong, Denise D Belsham
Neuropeptide Y (NPY)/Agouti-related peptide (AgRP)-expressing neurons in the hypothalamus induce feeding and decrease energy expenditure. With consumption of a diet high in fat, there is an increase in circulating saturated free fatty acids, including palmitate, leading to the development of neuroinflammation and secretion of cytokines, such as TNFα, and in turn activation of the canonical IKKβ/NFκB cascade. We describe a model of palmitate- and TNFα-induced neuroinflammation in a functionally characterized, immortalized NPY/AgRP-expressing cell model, mHypoE-46, to study whether the anti-diabetic metformin alone or in combination with the anti-inflammatory agent salicylate can ameliorate these detrimental effects...
2016: PloS One
https://www.readbyqxmd.com/read/27889747/alisol-a-24-acetate-prevents-hepatic-steatosis-and-metabolic-disorders-in-hepg2-cells
#15
Lu Zeng, WaiJiao Tang, JinJin Yin, LiJuan Feng, Yabing Li, Xiaorui Yao, BenJie Zhou
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is closely associated with metabolic disorders including hepatic lipid accumulation and inflammation. Alisol A 24-acetate, a triterpene from Alismatis rhizome, has multiple biologic activities such as hypolipidemic, anti-inflammatory and anti-diabetic. Thus we hypothesized that Alisol A 24 -acetate would have effect on NAFLD. The present study was conducted to investigate the therapeutic effects and potential mechanisms of Alisol A 24-acetate against hepatic steatosis in a free fatty acids (FFAs) induced NAFLD cell model...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27882945/adiponectin-reduces-er-stress-induced-apoptosis-through-ppar%C3%AE-transcriptional-regulation-of-atf2-in-mouse-adipose
#16
Zhenjiang Liu, Lu Gan, Tianjiao Wu, Fei Feng, Dan Luo, Huihui Gu, Shimin Liu, Chao Sun
Adiponectin is a cytokine produced predominantly by adipose tissue and correlates with glucose and lipid homeostasis. However, the effects of adiponectin on endoplasmic reticulum (ER) stress and apoptosis of adipose tissue remain elusive. In this study, we found that tunicamycin-induced ER stress increased serum free fatty acid (FFA) and impaired glucose tolerance, elevated the mRNA levels of GRP78, Chop, ATF2 and caspase 3, but reduced adiponectin mRNA level in white adipose tissue. Moreover, ER stress-triggered adipocyte apoptosis by increasing cellular FFA level and Ca(2+) level...
November 24, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27881420/elongation-of-long-chain-fatty-acid-family-member-6-elovl6-driven-fatty-acid-metabolism-regulates-vascular-smooth-muscle-cell-phenotype-through-amp-activated-protein-kinase-kr%C3%A3-ppel-like-factor-4-ampk-klf4-signaling
#17
Hiroaki Sunaga, Hiroki Matsui, Saki Anjo, Mas Risky A A Syamsunarno, Norimichi Koitabashi, Tatsuya Iso, Takashi Matsuzaka, Hitoshi Shimano, Tomoyuki Yokoyama, Masahiko Kurabayashi
BACKGROUND: Fatty acids constitute the critical components of cell structure and function, and dysregulation of fatty acid composition may exert diverging vascular effects including proliferation, migration, and differentiation of vascular smooth muscle cells (VSMCs). However, direct evidence for this hypothesis has been lacking. We investigated the role of elongation of long-chain fatty acid member 6 (Elovl6), a rate-limiting enzyme catalyzing the elongation of saturated and monounsaturated long-chain fatty acid, in the regulation of phenotypic switching of VSMC...
November 23, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27865350/the-fruit-of-acanthopanax-senticosus-rupr-et-maxim-harms-improves-insulin-resistance-and-hepatic-lipid-accumulation-by-modulation-of-liver-adenosine-monophosphate-activated-protein-kinase-activity-and-lipogenic-gene-expression-in-high-fat-diet-fed-obese-mice
#18
Tetsuo Saito, Miyako Nishida, Masafumi Saito, Akari Tanabe, Takahiro Eitsuka, Shi-Hua Yuan, Nobuo Ikekawa, Hiroshi Nishida
Obesity-associated insulin resistance is a major risk factor for most metabolic diseases, including dyslipidemia and type 2 diabetes. Acanthopanax senticosus (Rupr. et Maxim.) Harms (Goka) root has been used in traditional Chinese medicine for treatment of diabetes and other conditions; however, little is known about the effects of Goka fruit (GF). Goka fruit is rich in anthocyanin, which has beneficial effects on obesity and insulin resistance via activation of adenosine monophosphate-activated protein kinase (AMPK)...
October 2016: Nutrition Research
https://www.readbyqxmd.com/read/27847435/evaluation-of-fish-oil-rich-in-mufas-for-anti-diabetic-and-anti-inflammation-potential-in-experimental-type-2-diabetic-rats
#19
Waranya Keapai, Sopida Apichai, Doungporn Amornlerdpison, Narissara Lailerd
The advantages of monounsaturated fatty acids (MUFAs) on insulin resistance and type 2 diabetes mellitus (T2DM) have been well established. However, the molecular mechanisms of the anti-diabetic action of MUFAs remain unclear. This study examined the anti-hyperglycemic effect and explored the molecular mechanisms involved in the actions of fish oil- rich in MUFAs that had been acquired from hybrid catfish (Pangasius larnaudii×Pangasianodon hypophthalmus) among experimental type 2 diabetic rats. Diabetic rats that were fed with fish oil (500 and 1,000 mg/kg BW) for 12 weeks significantly reduced the fasting plasma glucose levels without increasing the plasma insulin levels...
November 2016: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/27825556/metabolic-pathways-in-t-cell-activation-and-lineage-differentiation
#20
REVIEW
Luís Almeida, Matthias Lochner, Luciana Berod, Tim Sparwasser
Recent advances in the field of immunometabolism support the concept that fundamental processes in T cell biology, such as TCR-mediated activation and T helper lineage differentiation, are closely linked to changes in the cellular metabolic programs. Although the major task of the intermediate metabolism is to provide the cell with a constant supply of energy and molecular precursors for the production of biomolecules, the dynamic regulation of metabolic pathways also plays an active role in shaping T cell responses...
October 2016: Seminars in Immunology
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