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Adipose triglyceride lipase

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https://www.readbyqxmd.com/read/29900686/optical-monitoring-of-adipose-tissue-destruction-under-encapsulated-lipase-action
#1
Irina Yu Yanina, Yulia I Svenskaya, Ekaterina S Prikhozhdenko, Daniil N Bratashov, Maria V Lomova, Dmitry A Gorin, Gleb B Sukhorukov, Valery V Tuchin
Enzymatic destruction of adipose tissue has been achieved by encapsulation of lipase into the polymeric microcapsules. Adipose tissue destruction was delayed while lipase is encapsulated comparing to the direct lipase action as demonstrated by optical microscopy and optical coherence tomographyin in vitro studies. Raman spectroscopy confirms that triglycerides in fat tissue were cleaved into free fatty acids, glycerol and possible di- and monoglyceride residues. The results underpin the concept of local and controlled treatment of tissues via encapsulation...
June 13, 2018: Journal of Biophotonics
https://www.readbyqxmd.com/read/29899429/dietary-intake-of-curcumin-improves-eif2-signaling-and-reduces-lipid-levels-in-the-white-adipose-tissue-of-obese-mice
#2
Masuko Kobori, Yumiko Takahashi, Hiroaki Takeda, Masatomo Takahashi, Yoshihiro Izumi, Yukari Akimoto, Mutsumi Sakurai, Hideaki Oike, Toshiyuki Nakagawa, Masanori Itoh, Takeshi Bamba, Toshiyuki Kimura
White adipose tissue (eWAT) plays a crucial role in preventing metabolic syndrome. We aimed to investigate WAT distribution and gene expression and lipidomic profiles in epididymal WAT (eWAT) in diet-induced obese mice, reflecting a Western-style diet of humans to elucidate the bioactive properties of the dietary antioxidant curcumin in preventing lifestyle-related diseases. For 16 weeks, we fed C57BL/6J mice with a control diet, a high-fat, high-sucrose and high-cholesterol Western diet or Western diet supplemented with 0...
June 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29896513/lipidomic-data-on-lipid-droplet-triglyceride-remodelling-associated-with-protection-of-breast-cancer-cells-from-lipotoxic-stress
#3
Eva Jarc, Thomas O Eichmann, Robert Zimmermann, Toni Petan
The data presented here is related to the research article entitled "Lipid droplets induced by secreted phospholipase A2 and unsaturated fatty acids protect breast cancer cells from nutrient and lipotoxic stress" by E. Jarc et al., Biochim. Biophys. Acta 1863 (2018) 247-265. Elevated uptake of unsaturated fatty acids and lipid droplet accumulation are characteristic of aggressive cancer cells and have been associated with the cellular stress response. The present study provides lipidomic data on the triacylglycerol (TAG) and phosphatidylcholine (PC) composition of MDA-MB-231 breast cancer cells exposed to docosahexaenoic acid (DHA; 22:6, ω-3)...
June 2018: Data in Brief
https://www.readbyqxmd.com/read/29866598/pigment-epithelium-derived-factor-in-lipid-metabolic-disorders
#4
Kuang-Tzu Huang, Chih-Che Lin, Ming-Chao Tsai, Kuang-Den Chen, King-Wah Chiu
Pigment epithelium-derived factor (PEDF) is a secreted glycoprotein that has anti-angiogenic, anti-proliferative, neurotrophic and immunomodulatory properties. PEDF has recently emerged as a critical metabolic regulatory protein since the discovery of its modulatory activities in the lipolytic pathway by binding to adipose triglyceride lipase (ATGL). Despite being beneficial in maintaining the homeostasis of hepatic lipid accumulation, PEDF has been uncovered an unfavorable role associated with insulin resistance...
April 2018: Biomedical Journal
https://www.readbyqxmd.com/read/29792311/pedf-regulates-plasticity-of-a-novel-lipid-mtoc-axis-in-prostate-cancer-associated-fibroblasts
#5
Francesca Nardi, Philip Fitchev, Omar E Franco, Jelena Ivanisevic, Adrian Scheibler, Simon W Hayward, Charles B Brendler, Michael A Welte, Susan E Crawford
Prostate tumors make metabolic adaptations to ensure adequate energy and amplify cell cycle regulators such as centrosomes to sustain their proliferative capacity. It is not known whether cancer associated fibroblasts (CAFs) undergo metabolic re-programming. We postulated that CAFs augment lipid storage and amplify centrosomal or non-centrosomal microtubule organizing centers (MTOCs) through a pigment epithelium-derived factor (PEDF)-dependent lipid-MTOC signaling axis. Primary normal human prostate fibroblasts (NFs) and CAFs were evaluated for lipid content, triacylglycerol-regulating proteins, MTOC number and distribution...
May 23, 2018: Journal of Cell Science
https://www.readbyqxmd.com/read/29764424/long-non-coding-rna-neat1-modulated-abnormal-lipolysis-via-atgl-drives-hepatocellular-carcinoma-proliferation
#6
Xirui Liu, Yingjian Liang, Ruipeng Song, Guangchao Yang, Jihua Han, Yaliang Lan, Shangha Pan, Mingxi Zhu, Yao Liu, Yan Wang, Fanzheng Meng, Yifeng Cui, Jiabei Wang, Bo Zhang, Xuan Song, Zhaoyang Lu, Tongsen Zheng, Lianxin Liu
BACKGROUND: Abnormal metabolism, including abnormal lipid metabolism, is a hallmark of cancer cells. Some studies have demonstrated that the lipogenic pathway might promote the development of hepatocellular carcinoma (HCC). However, the role of the lipolytic pathway in HCC has not been elucidated. METHODS: We compared levels of adipose triglyceride lipase (ATGL) in human HCC and healthy liver tissues by real time PCR, western blot and immunohistochemistry. We measured diacylglycerol(DAG) and free fatty acid (FFA) levels in HCC cells driven by the NEAT1-ATGL axis and in HCC tissues...
May 15, 2018: Molecular Cancer
https://www.readbyqxmd.com/read/29758402/lactation-related-changes-in-tissue-expression-of-pedf-in-dairy-cows
#7
H Sadri, B Saremi, S Dänicke, J Rehage, M Mielenz, A Hosseini, H Sauerwein
Pigment epithelium-derived factor (PEDF) is evolving as metabolic regulatory protein. Albeit mostly considered in only pathological conditions related to excess energy intake resulting in obesity and insulin resistance, PEDF is likely to be involved in other physiological processes such as the homeorhetic adaptation of metabolism to lactation. We aimed to characterize the expression of PEDF and its association to the concomitant mobilization of body reserves during lactation in nonobese subjects. This mobilization is particularly distinct in dairy cows, and we therefore assessed the mRNA expression of PEDF and its putative receptors in different tissues in 2 trials with dairy cows fed with or without conjugated linoleic acids (CLAs)...
April 17, 2018: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/29750414/glucose-dependent-insulinotropic-polypeptide-increases-blood-flow-in-adipose-tissue-of-humans-by-recruiting-capillaries
#8
Meena Asmar, Ali Asmar, Lene Simonsen, Jens Juul Holst, Jens Bülow
Context and objektive: Glucose-dependent insulinotropic polypeptide (GIP) in combination with hyperinsulinemia increase blood flow and triglyceride clearance in subcutaneous abdominal adipose tissue in lean humans. The present experiments were performed to determine whether the increase may involve capillary recruitment. Design: Eight lean healthy volunteers were studied before and after 1-h infusion of GIP or saline during a hyperglycemic-hyperinsulinemic clamp, raising plasma glucose and insulin to postprandial levels...
May 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29746655/downregulated-angiopoietin-like-peptide-8-production-at-calving-related-to-changes-in-lipid-metabolism-in-dairy-cows
#9
Misato Nakano, Yutaka Suzuki, Satoshi Haga, Eri Yamauchi, Dahye Kim, Koki Nishihara, K Nakajima, Takafumi Gotoh, Seungju Park, Myunggi Baik, Kazuo Katoh, Sanggun Roh
Acute physiological adaptation of lipid metabolism during the postpartum transition period of cows facilitates peripheral metabolic regulation. Hepatokines, which are hormones secreted from hepatocytes, are presumed to play a critical role in systemic metabolic regulation. Angiopoietin-like protein 8 (ANGPTL8) has been identified as a novel hepatokine associated with circulating triglyceride concentrations in mice and humans. However, regulation of ANGPTL8 and its physiological effects are still unknown in cattle...
May 9, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29742122/time-controlled-fasting-prevents-aging-like-mitochondrial-changes-induced-by-persistent-dietary-fat-overload-in-skeletal-muscle
#10
Daniele Lettieri-Barbato, Stefano Maria Cannata, Viviana Casagrande, Maria Rosa Ciriolo, Katia Aquilano
A large body of evidence suggests that persistent dietary fat overload causes mitochondrial dysfunction and systemic metabolic gridlock. Mitochondrial and lipid metabolism in skeletal muscle (SkM) are severely affected upon persistent high fat diet (HFD) leading to premature tissue aging. Here, we designed weekly cycles of fasting (called as time-controlled fasting, TCF) and showed that they were effective in limiting mitochondrial damage and metabolic disturbances induced by HFD. Specifically, TCF was able to prevent the decline of adipose triglyceride lipase (Atgl), maintain efficient mitochondrial respiration in SkM as well as improve blood glucose and lipid profile...
2018: PloS One
https://www.readbyqxmd.com/read/29739862/novel-gpihbp1-independent-pathway-for-clearance-of-plasma-tgs-in-angptl4-gpihbp1-mice
#11
Emily M Cushing, Kelli L Sylvers, Xun Chi, Shwetha K Shetty, Brandon Sj Davies
Mice lacking glycosylphosphatidylinositol-anchored high-density lipoprotein binding protein 1 (GPIHBP1) are unable to traffic LPL to the vascular lumen. Thus, TG clearance is severely blunted, and mice are extremely hypertriglyceridemic. Paradoxically, mice lacking both GPIHBP1 and the LPL regulator angiopoietin-like 4 (ANGPTL4) are far less hypertriglyceridemic. We sought to determine the mechanism by which Angptl4 -/- Gpihbp1 -/- double knockout mice clear plasma triglycerides. We confirmed that, on a normal chow diet, plasma TG levels were lower in Angptl4 -/- Gpihbp1 -/- mice than in Gpihbp1 -/- mice; however, the difference disappeared with administration of a high-fat diet...
May 8, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29729371/involvement-of-glucocorticoid-prereceptor-metabolism-and-signaling-in-rat-visceral-adipose-tissue-lipid-metabolism-after-chronic-stress-combined-with-high-fructose-diet
#12
Biljana Bursać, Ana Djordjevic, Nataša Veličković, Danijela Vojnović Milutinović, Snježana Petrović, Ana Teofilović, Ljupka Gligorovska, Frederic Preitner, Luc Tappy, Gordana Matić
Both fructose overconsumption and increased glucocorticoids secondary to chronic stress may contribute to overall dyslipidemia. In this study we specifically assessed the effects and interactions of dietary fructose and chronic stress on lipid metabolism in the visceral adipose tissue (VAT) of male Wistar rats. We analyzed the effects of 9-week 20% high fructose diet and 4-week chronic unpredictable stress, separately and in combination, on VAT histology, glucocorticoid prereceptor metabolism, glucocorticoid receptor subcellular redistribution and expression of major metabolic genes...
May 2, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29705966/molecular-cloning-of-adipose-triglyceride-lipase-atgl-gene-from-blunt-snout-bream-and-its-expression-after-lps-induced-tnf-%C3%AE-factor
#13
Yong-Jun Dai, Wen-Bin Liu, Xiang-Fei Li, Man Zhou, Chao Xu, Yu Qian, Guang-Zhen Jiang
The aims of the present study were to clone the full-length cDNA of adipose triglyceridelipase (ATGL) and to analyze its expression after lipopolysaccharide (LPS)-induced tumor necrosis factor alpha (TNF-α). The cDNA obtained covered 1801 bp with an open reading frame of 1500 bp encoding 499 amino acids. Sequence alignment and phylogenetic analysis show the best identity with Cyprinus carpio (86%). The ATGL protein shared a highly conserved 169-amino acid patatin domain, containing a glycine-rich motif, an active serine hydrolase motif, and an aspartic active site...
April 29, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29705134/increase-in-liver-cytosolic-lipases-activities-and-vldl-tag-secretion-rate-do-not-prevent-the-non-alcoholic-fatty-liver-disease-in-cafeteria-diet-fed-rats
#14
Anderson Fernandes de Melo, Carolina Campos Lima Moreira, Camila Ferreira Sales, Thiago Rentz, Helena Fonseca Raposo, Maria Antonieta Rissato Garófalo, Leida Maria Botion, Isis do Carmo Kettelhut, Helena Coutinho Franco de Oliveira, Valéria Ernestânia Chaves
We have previously shown that the cafeteria diet increases body fat mass, plasma triacylglycerol (TAG) and insulin levels, glucose uptake by white and brown adipose tissues, as well as the sympathetic activity to both adipose tissues in Wistar rats. The metabolic pathways responsible for the development of non-alcoholic fatty liver disease (NAFLD) were examined in cafeteria diet-fed rats. After 3 weeks offering cafeteria diet, we evaluated: (i) activity of the sympathetic nervous system by norepinephrine turnover rates; (ii) de novo fatty acid synthesis in vivo using 3 H2 O; (iii) secretion of very low density lipoprotein (VLDL)-TAG secretion measuring serum TAG levels after administration of lipase lipoprotein inhibitor, (iv) liver cytosolic lipases activities and (v) liver mRNA expression of enzymes involved in lipids secretion and oxidation by RT-PCR...
July 2018: Biochimie
https://www.readbyqxmd.com/read/29701782/grape-seed-procyanidin-extract-inhibits-adipogenesis-and-stimulates-lipolysis-of-porcine-adipocytes-in-vitro
#15
S Wei, Y Zheng, M Zhang, H Zheng, P Yan
The objective of this paper was to evaluate in vitro effect of grape seed procyanidin extract (GSPE) on differentiation, proliferation, and lipolysis of porcine adipocytes, providing a molecular basis for the use of GSPE in pig fat regulation. Primary preadipocytes isolated from subcutaneous adipose tissue of pigs were used as the in vitro cell model. Treatment of GSPE repressed preadipocyte differentiation, as evidenced by reduced lipid accumulation, decreased mRNA expressions of peroxisome proliferator-activated receptor gamma (PPARγ) and fatty acid binding protein 4 (FABP4) , as well as enhanced expressions of preadipocyte factor-1 (Pref-1)...
April 26, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29627983/fish-oil-supplementation-alleviates-the-altered-lipid-homeostasis-in-blood-liver-and-adipose-tissues-in-high-fat-diet-fed-rats
#16
Chen-Yuan Chiu, Lou-Pin Wang, Shing-Hwa Liu, Meng-Tsan Chiang
This study investigated the effects of dietary supplementation of fish oil on the signals of lipid metabolism involved in hepatic cholesterol and triglyceride influx and excretion in high-fat diet (HFD)-fed rats. Fish oil (FO) repressed body (HFD, 533 ± 18.2 g; HFD+FO, 488 ± 28.0 g, p < 0.05) and liver weights (HFD, 5.7 ± 0.6 g/100 g of body weight; HFD+FO, 4.8 ± 0.4 g/100 g of body weight, p < 0.05) in HFD-fed rats. Fish oil could also improve HFD-induced imbalance of lipid metabolism in blood, liver, and adipose tissues including the significant decreases in plasma and liver total cholesterol (TC) (plasma-HFD, 113 ± 33...
April 25, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29627378/brown-adipose-tissue-derived-angptl4-controls-glucose-and-lipid-metabolism-and-regulates-thermogenesis
#17
Abhishek K Singh, Binod Aryal, Balkrishna Chaube, Noemi Rotllan, Luis Varela, Tamas L Horvath, Yajaira Suárez, Carlos Fernández-Hernando
OBJECTIVES: Brown adipose tissue (BAT) controls triglyceride-rich lipoprotein (TRL) catabolism. This process is mediated by the lipoprotein lipase (LPL), an enzyme that catalyzed the hydrolysis of triglyceride (TAG) in glycerol and fatty acids (FA), which are burned to generate heat. LPL activity is regulated by angiopoietin-like 4 (ANGPTL4), a secretory protein produced in adipose tissues (AT), liver, kidney, and muscle. While the role of ANGPTL4 in regulating lipoprotein metabolism is well established, the specific contribution of BAT derived ANGPTL4 in controlling lipid and glucose homeostasis is not well understood...
May 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29626981/placental-lipoprotein-lipase-activity-is-positively-associated-with-newborn-adiposity
#18
Margaret J R Heerwagen, Diane L Gumina, Teri L Hernandez, Rachael E Van Pelt, Anita W Kramer, Rachel C Janssen, Dalan R Jensen, Theresa L Powell, Jacob E Friedman, Virginia D Winn, Linda A Barbour
INTRODUCTION: Recent data suggest that in addition to glucose, fetal growth is related to maternal triglycerides (TG). To reach the fetus, TG must be hydrolyzed to free fatty acids (FFA) and transported across the placenta, but regulation is uncertain. Placental lipoprotein lipase (pLPL) hydrolyzes TG, both dietary chylomicron TG (CM-TG) and very-low density lipoprotein TG (VLDL-TG), to FFA. This may promote fetal fat accretion by increasing the available FFA pool for placental uptake...
April 2018: Placenta
https://www.readbyqxmd.com/read/29617909/maternal-nicotine-exposure-mne-leads-to-augmented-expression-of-the-anti-oxidant-adipose-tissue-triglyceride-lipase-atgl-long-term-in-the-white-adipose-of-female-rat-offspring
#19
Nicole G Barra, Taylor VanDuzer, Alison C Holloway, Daniel B Hardy
Globally, approximately 10-25% of women smoke during pregnancy. Since nicotine is highly addictive, women may use nicotine containing products like nicotine replacement therapies for smoking cessation, but the long-term consequences of early life exposure to nicotine remain poorly defined. Our laboratory has previously demonstrated that maternal nicotine exposed (MNE) rat offspring exhibit hypertriglyceridemia due to increased hepatic de novo lipogenesis. Hypertriglyceridemia may also be attributed to impaired white adipose tissue (WAT) lipid storage; however, the effects of MNE on WAT are not completely understood...
March 30, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29604498/oxidative-stress-and-mitochondrial-dysfunction-mediated-cd-induced-hepatic-lipid-accumulation-in-zebrafish-danio-rerio
#20
Ya-Xiong Pan, Zhi Luo, Mei-Qing Zhuo, Chuan-Chuan Wei, Guang-Hui Chen, Yu-Feng Song
The present study was performed to determine the effect of waterborne CdCl2 exposure influencing lipid deposition and metabolism, oxidative stress and mitochondrial dysfunction, and explore the underlying molecular mechanism of cadmium (Cd)-induced disorder of hepatic lipid metabolism in fish. To this end, adult zebrafish were exposed to three waterborne CdCl2 concentrations (0(control), 5 and 25 μg Cd/l, respectively) for 30 days. Lipid accumulation, the activities of enzymes related to lipid metabolism and oxidative stress, as well as the expression level of genes involved in lipid metabolism and mitophagy were determined in the liver of zebrafish...
June 2018: Aquatic Toxicology
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