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Nuclear lipidomics

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https://www.readbyqxmd.com/read/29765489/gallic-acid-l-leucine-conjugate-protects-mice-against-lps-induced-inflammation-and-sepsis-via-correcting-proinflammatory-lipid-mediator-profiles-and-oxidative-stress
#1
Yuanyuan Cheng, Xuechen Li, Hung-Fat Tse, Jianhui Rong
The pathology of endotoxin LPS-induced sepsis is hallmarked by aberrant production of proinflammatory lipid mediators and nitric oxide (NO). The aim of the present study was to determine whether the new product gallic acid-L-leucine (GAL) conjugate could ameliorate the LPS-induced dysregulation of arachidonic acid metabolism and NO production. We first investigated the effects of GAL conjugate on the expression of proinflammatory enzymes and the production of proinflammatory NO and lipid mediators in mouse macrophage cell line RAW264...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29754800/pcyt1a-regulates-phosphatidylcholine-homeostasis-from-the-inner-nuclear-membrane-in-response-to-membrane-stored-curvature-elastic-stress
#2
Afreen Haider, Yu-Chen Wei, Koini Lim, Antonio D Barbosa, Che-Hsiung Liu, Ursula Weber, Marek Mlodzik, Kadri Oras, Simon Collier, M Mahmood Hussain, Liang Dong, Satish Patel, Anna Alvarez-Guaita, Vladimir Saudek, Benjamin J Jenkins, Albert Koulman, Marcus K Dymond, Roger C Hardie, Symeon Siniossoglou, David B Savage
Cell and organelle membranes consist of a complex mixture of phospholipids (PLs) that determine their size, shape, and function. Phosphatidylcholine (PC) is the most abundant phospholipid in eukaryotic membranes, yet how cells sense and regulate its levels in vivo remains unclear. Here we show that PCYT1A, the rate-limiting enzyme of PC synthesis, is intranuclear and re-locates to the nuclear membrane in response to the need for membrane PL synthesis in yeast, fly, and mammalian cells. By aligning imaging with lipidomic analysis and data-driven modeling, we demonstrate that yeast PCYT1A membrane association correlates with membrane stored curvature elastic stress estimates...
May 7, 2018: Developmental Cell
https://www.readbyqxmd.com/read/29728575/dual-extraction-of-mrna-and-lipids-from-a-single-biological-sample
#3
Normand Podechard, Simon Ducheix, Arnaud Polizzi, Frédéric Lasserre, Alexandra Montagner, Vincent Legagneux, Edwin Fouché, Fabrice Saez, Jean-Marc Lobaccaro, Laila Lakhal, Sandrine Ellero-Simatos, Pascal G Martin, Nicolas Loiseau, Justine Bertrand-Michel, Hervé Guillou
The extraction of RNA and lipids from a large number of biological samples is time-consuming and costly with steps required for both transcriptomic and lipidomic approaches. Most protocols rely on independent extraction of nucleic acids and lipids from a single sample, thereby increasing the need for biological material and inducing variability in data analysis. We investigated whether it is possible to use a standard RNA extraction procedure to analyze not only RNA levels, but also lipids in a single liver sample...
May 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29707950/deciphering-the-underlying-metabolomic-and-lipidomic-patterns-linked-to-thermal-acclimation-in-saccharomyces-cerevisiae
#4
Francesc Puig-Castellvi, Carmen Bedia, Ignacio Alfonso, Benjamin Pina, Romà Tauler
Temperature is one of the most critical parameters for yeast growth, and it has deep consequences in many industrial processes where yeast is involved. Nevertheless, the metabolic changes required to accommodate yeast cells at high or low temperatures are still poorly understood. In this work, the ultimate responses of these induced transcriptomic effects have been examined using metabolomics-derived strategies. The yeast metabolome and lipidome have been characterized by one-dimensional proton nuclear magnetic resonance spectroscopy and ultra-high-performance liquid chromatography-mass spectrometry at four temperatures, corresponding to low, optimal, high, and extreme thermal conditions...
April 30, 2018: Journal of Proteome Research
https://www.readbyqxmd.com/read/29549163/nrf2-mediated-antioxidant-defense-and-peroxiredoxin-6-are-linked-to-biosynthesis-of-palmitic-acid-ester-of-9-hydroxystearic-acid
#5
Ondrej Kuda, Marie Brezinova, Jan Silhavy, Vladimir Landa, Vaclav Zidek, Chandra Dodia, Franziska Kreuchwig, Marek Vrbacky, Laurence Balas, Thierry Durand, Norbert Hübner, Aron B Fisher, Jan Kopecky, Michal Pravenec
Fatty acid esters of hydroxy fatty acids (FAHFAs) are lipid mediators with promising anti-diabetic and anti-inflammatory properties that are formed in white adipose tissue (WAT) via de novo lipogenesis, but their biosynthetic enzymes are unknown. Using a combination of lipidomics in WAT, QTL mapping and correlation analyses in rat BXH/HXB recombinant inbred strains, and response to oxidative stress in murine models, we elucidated the potential pathway of biosynthesis of several FAHFAs.Comprehensive analysis of WAT samples identified ∼160 regioisomers documenting the complexity of this lipid class...
March 16, 2018: Diabetes
https://www.readbyqxmd.com/read/29515023/lrh-1-regulates-hepatic-lipid-homeostasis-and-maintains-arachidonoyl-phospholipid-pools-critical-for-phospholipid-diversity
#6
Diego A Miranda, William C Krause, Amaury Cazenave-Gassiot, Miyuki Suzawa, Hazel Escusa, Juat Chin Foo, Diyala S Shihadih, Andreas Stahl, Mark Fitch, Edna Nyangau, Marc Hellerstein, Markus R Wenk, David L Silver, Holly A Ingraham
Excess lipid accumulation is an early signature of nonalcoholic fatty liver disease (NAFLD). Although liver receptor homolog 1 (LRH-1) (encoded by NR5A2) is suppressed in human NAFLD, evidence linking this phospholipid-bound nuclear receptor to hepatic lipid metabolism is lacking. Here, we report an essential role for LRH-1 in hepatic lipid storage and phospholipid composition based on an acute hepatic KO of LRH-1 in adult mice (LRH-1AAV8-Cre mice). Indeed, LRH-1-deficient hepatocytes exhibited large cytosolic lipid droplets and increased triglycerides (TGs)...
March 8, 2018: JCI Insight
https://www.readbyqxmd.com/read/29474492/docosahexaenoic-acid-antagonizes-the-boosting-effect-of-palmitic-acid-on-lps-inflammatory-signaling-by-inhibiting-gene-transcription-and-ceramide-synthesis
#7
Junfei Jin, Zhongyang Lu, Yanchun Li, L Ashley Cowart, Maria F Lopes-Virella, Yan Huang
It is well known that saturated fatty acids (SFAs) and unsaturated fatty acid, in particular omega-3 polyunsaturated fatty acids (n-3 PUFAs), have different effects on inflammatory signaling: SFAs are pro-inflammatory but n-3 PUFAs have strong anti-inflammatory properties. We have reported that palmitic acid (PA), a saturated fatty acid, robustly amplifies lipopolysaccharide (LPS) signaling to upregulate proinflammatory gene expression in macrophages. We also reported that the increased production of ceramide (CER) via sphingomyelin (SM) hydrolysis and CER de novo synthesis plays a key role in the synergistic effect of LPS and PA on proinflammatory gene expression...
2018: PloS One
https://www.readbyqxmd.com/read/29380328/qualitative-and-quantitative-nmr-approaches-in-blood-serum-lipidomics
#8
Banny Silva Barbosa, Lucas Gelain Martins, Tássia B B C Costa, Guilherme Cruz, Ljubica Tasic
Nuclear magnetic resonance (NMR) spectroscopy in combination with chemometrics can be applied in the analysis of complex biological samples in many ways. For example, we can analyze lipids, elucidate their structures, determine their nutritional values, and determine their distribution in blood serum. As lipids are not soluble in water, they are transported in blood as lipid-rich self-assembled particles, divided into different density assemblies from high- to very-low-density lipoproteins (HDL to VLDL), or by combining with serum proteins, such as albumins (human serum albumins (HSA))...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29284607/weight-loss-and-exercise-alter-the-high-density-lipoprotein-lipidome-and-improve-high-density-lipoprotein-functionality-in-metabolic-syndrome
#9
Anmar A Khan, Piyushkumar A Mundra, Nora E Straznicky, Paul J Nestel, Gerard Wong, Ricardo Tan, Kevin Huynh, Theodore W Ng, Natalie A Mellett, Jacquelyn M Weir, Christopher K Barlow, Zahir H Alshehry, Gavin W Lambert, Bronwyn A Kingwell, Peter J Meikle
OBJECTIVE: High-density lipoprotein (HDL) lipid composition and function may better reflect cardiovascular risk than HDL cholesterol concentration. This study characterized the relationships between HDL composition, metabolism, and function in metabolic syndrome (MetS) patients and how changes in composition after weight loss (WL) and exercise treatments are related to function. APPROACH AND RESULTS: Plasma samples from MetS patients (n=95) and healthy individuals (n=40) were used in this study...
February 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29259801/treatment-with-liraglutide-may-improve-markers-of-cvd-reflected-by-reduced-levels-of-apob
#10
L Engelbrechtsen, J Lundgren, N J Wewer Albrechtsen, Y Mahendran, E W Iepsen, P Finocchietto, A E Jonsson, S Madsbad, J J Holst, H Vestergaard, T Hansen, S S Torekov
Background: Dislipidaemia and increased levels of apolipoprotein B (apoB) in individuals with obesity are risk factors for development of cardiovascular disease (CVD). The aim of this study was to investigate the effect of weight loss and weight maintenance with and without liraglutide treatment on plasma lipid profiles and apoB. Methods: Fifty-eight individuals with obesity (body mass index 34.5 ± 3.0 kg/m2 [mean ± SD]) were included in this study. After 8 weeks on a very low-calorie diet (800 kcal/day), participants were randomized to weight maintenance with meal replacements with or without liraglutide (1...
December 2017: Obesity Science & Practice
https://www.readbyqxmd.com/read/29136239/changes-in-membrane-lipid-composition-and-function-accompanying-chilling-injury-in-bell-peppers
#11
Ximan Kong, Baodong Wei, Zhu Gao, Ying Zhou, Fei Shi, Xin Zhou, Qian Zhou, Shujuan Ji
Bell peppers are vulnerable to low temperature (<7°C) and subject to chilling injury (CI). To elucidate the relationship between cell membrane lipid composition and CI, a membrane lipidomic approach was taken. In addition, we performed microstructural analysis and low-field nuclear magnetic resonance to better understand CI. We also monitored primary physiological metabolism parameters to explain lipidomics. Our study indicated that cellular structure damage was more serious at 4°C, mostly represented by damage to the plasmalemma and plastid degradation...
January 1, 2018: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29068532/alteration-of-liver-peroxisomal-and-mitochondrial-functionality-in-the-nzo-mouse-model-of-metabolic-syndrome
#12
Birgit Knebel, Simon Göddeke, Sonja Hartwig, Tina Hörbelt, Pia Fahlbusch, Hadi Al-Hasani, Sylvia Jacob, Cornelia Koellmer, Ulrike Nitzgen, Martina Schiller, Stefan Lehr, Jorg Kotzka
PURPOSE: Metabolic syndrome (MetS) consists of five risk factors: elevated blood pressure and fasting glucose, visceral obesity, dyslipidemia, and hypercholesterinemia. The physiological impact of lipid metabolism indicated as visceral obesity and hepatic lipid accumulation on MetS is still under debate. One major cause of disturbed lipid metabolism might be dysfunction of cellular organelles controlling energy homeostasis, i.e., mitochondria and peroxisomes. EXPERIMENTAL DESIGN: The New Zealand Obese (NZO) mouse model exhibits a polygenic syndrome of obesity, insulin resistance, triglyceridemia, and hypercholesterolemia that resembles human metabolic syndrome...
January 2018: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/29051579/myocardial-metabolic-alterations-in-mice-with-diet-induced-atherosclerosis-linking-sulfur-amino-acid-and-lipid-metabolism
#13
Jueun Lee, Sunhee Jung, Nami Kim, Min-Jeong Shin, Do Hyun Ryu, Geum-Sook Hwang
Atherosclerosis is a leading cause of cardiovascular disease (CVD), but the effect of diet on the atherosclerotic heart's metabolism is unclear. We used an integrated metabolomics and lipidomics approach to evaluate metabolic perturbations in heart and serum from mice fed an atherogenic diet (AD) for 8, 16, and 25 weeks. Nuclear magnetic resonance (NMR)-based metabolomics revealed significant changes in sulfur amino acid (SAA) and lipid metabolism in heart from AD mice compared with heart from normal diet mice...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28911967/applications-of-nuclear-magnetic-resonance-in-lipid-analyses-an-emerging-powerful-tool-for-lipidomics-studies
#14
REVIEW
Jingbo Li, Thomas Vosegaard, Zheng Guo
The role of lipids in cell, tissue, and organ physiology is crucial; as many diseases, including cancer, diabetes, neurodegenerative, and infectious diseases, are closely related to absorption and metabolism of lipids. Mass spectrometry (MS) based methods are the most developed powerful tools to study the synthetic pathways and metabolic networks of cellular lipids in biological systems; leading to the birth of an emerging subject lipidomics, which has been extensively reviewed. Nuclear magnetic resonance (NMR), another powerful analytical tool, which allows the visualization of single atoms and molecules, is receiving increasing attention in lipidomics analyses...
October 2017: Progress in Lipid Research
https://www.readbyqxmd.com/read/28877455/global-analysis-of-plasma-lipids-identifies-liver-derived-acylcarnitines-as-a-fuel-source-for-brown-fat-thermogenesis
#15
Judith Simcox, Gisela Geoghegan, John Alan Maschek, Claire L Bensard, Marzia Pasquali, Ren Miao, Sanghoon Lee, Lei Jiang, Ian Huck, Erin E Kershaw, Anthony J Donato, Udayan Apte, Nicola Longo, Jared Rutter, Renate Schreiber, Rudolf Zechner, James Cox, Claudio J Villanueva
Cold-induced thermogenesis is an energy-demanding process that protects endotherms against a reduction in ambient temperature. Using non-targeted liquid chromatography-mass spectrometry-based lipidomics, we identified elevated levels of plasma acylcarnitines in response to the cold. We found that the liver undergoes a metabolic switch to provide fuel for brown fat thermogenesis by producing acylcarnitines. Cold stimulates white adipocytes to release free fatty acids that activate the nuclear receptor HNF4α, which is required for acylcarnitine production in the liver and adaptive thermogenesis...
September 5, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28774777/insights-into-the-role-of-hepatocyte-ppar%C3%AE-activity-in-response-to-fasting
#16
REVIEW
Marion Régnier, Arnaud Polizzi, Yannick Lippi, Edwin Fouché, Géraldine Michel, Céline Lukowicz, Sarra Smati, Alain Marrot, Frédéric Lasserre, Claire Naylies, Aurélie Batut, Fanny Viars, Justine Bertrand-Michel, Catherine Postic, Nicolas Loiseau, Walter Wahli, Hervé Guillou, Alexandra Montagner
The liver plays a central role in the regulation of fatty acid metabolism. Hepatocytes are highly sensitive to nutrients and hormones that drive extensive transcriptional responses. Nuclear hormone receptors are key transcription factors involved in this process. Among these factors, PPARα is a critical regulator of hepatic lipid catabolism during fasting. This study aimed to analyse the wide array of hepatic PPARα-dependent transcriptional responses during fasting. We compared gene expression in male mice with a hepatocyte specific deletion of PPARα and their wild-type littermates in the fed (ad libitum) and 24-h fasted states...
July 31, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28542405/exchange-of-polar-lipids-from-adults-to-neonates-in-daphnia-magna-perturbations-in-sphingomyelin-allocation-by-dietary-lipids-and-environmental-toxicants
#17
Namrata Sengupta, Delaney C Reardon, Patrick D Gerard, William S Baldwin
Because xenosensing nuclear receptors are also lipid sensors that regulate lipid allocation, we hypothesized that toxicant-induced modulation of HR96 activity would alter lipid profiles and the balance between adult survival and neonate production following exposure in Daphnia magna. Adult daphnids were exposed to unsaturated fatty acid- and toxicant- activators or inhibitors of HR96 and later starved to test whether chemical exposure altered allocation toward survival or reproduction. The HR96 activators, linoleic acid and atrazine, decreased reproduction as expected with concomitant changes in the expression of HR96 regulated genes such as magro...
2017: PloS One
https://www.readbyqxmd.com/read/28475424/metabolic-dysregulation-after-neutron-exposures-expected-from-an-improvised-nuclear-device
#18
COMPARATIVE STUDY
Evagelia C Laiakis, Yi-Wen Wang, Erik F Young, Andrew D Harken, Yanping Xu, Lubomir Smilenov, Guy Y Garty, David J Brenner, Albert J Fornace
The increased threat of terrorism across the globe has raised fears that certain groups will acquire and use radioactive materials to inflict maximum damage. In the event that an improvised nuclear device (IND) is detonated, a potentially large population of victims will require assessment for radiation exposure. While photons will contribute to a major portion of the dose, neutrons may be responsible for the severity of the biologic effects and cellular responses. We investigated differences in response between these two radiation types by using metabolomics and lipidomics to identify biomarkers in urine and blood of wild-type C57BL/6 male mice...
July 2017: Radiation Research
https://www.readbyqxmd.com/read/28392013/characterizing-the-lipid-and-metabolite-changes-associated-with-placental-function-and-pregnancy-complications-using-ion-mobility-spectrometry-mass-spectrometry-and-mass-spectrometry-imaging
#19
Kristin E Burnum-Johnson, Erin S Baker, Thomas O Metz
Successful pregnancy is dependent upon discrete biological events, which include embryo implantation, decidualization, and placentation. Problems associated with each of these events can cause infertility or conditions such as preeclampsia. A greater understanding of the molecular changes associated with these complex processes is necessary to aid in identifying treatments for each condition. Previous nuclear magnetic resonance spectroscopy and mass spectrometry studies have been used to identify metabolites and lipids associated with pregnancy-related complications...
December 2017: Placenta
https://www.readbyqxmd.com/read/28340309/analytical-techniques-in-lipidomics-state-of-the-art
#20
REVIEW
Kamil Jurowski, Kamila Kochan, Justyna Walczak, Małgorzata Barańska, Wojciech Piekoszewski, Bogusław Buszewski
Current studies related to lipid identification and determination, or lipidomics in biological samples, are one of the most important issues in modern bioanalytical chemistry. There are many articles dedicated to specific analytical strategies used in lipidomics in various kinds of biological samples. However, in such literature, there is a lack of articles dedicated to a comprehensive review of the actual analytical methodologies used in lipidomics. The aim of this article is to characterize the lipidomics methods used in modern bioanalysis according to the methodological point of view: (1) chromatography/separation methods, (2) spectroscopic methods and (3) mass spectrometry and also hyphenated methods...
September 3, 2017: Critical Reviews in Analytical Chemistry
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