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https://www.readbyqxmd.com/read/29906693/proteomic-response-of-gill-microsomes-of-crassostrea-brasiliana-exposed-to-diesel-fuel-water-accommodated-fraction
#1
Gabrielle do Amaral E Silva Müller, Karim Hahn Lüchmann, Guilherme Razzera, Guilherme Toledo-Silva, Maria João Bebianno, Maria Risoleta Freire Marques, Afonso Celso Dias Bainy
Diesel fuel water-accommodated fraction (diesel-WAF) is a complex mixture of organic compounds that may cause harmful effects to marine invertebrates. Expression of microsomal proteins can be changed by oil exposure, causing functional alterations in endoplasmic reticulum (ER). The aim of this study was to investigate changes in protein expression signatures in microsomes of oysterl Crassostrea brasiliana (=C.gasar) gill after exposure to 10% diesel-WAF for 24 and 72 h. Protein expression signatures of gills of oysters exposed to diesel-WAF were compared to those of unexposed oysters using two-dimensional electrophoresis (2-DE) to identify differentially expressed proteins...
June 6, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29883377/circulating-phospholipid-patterns-in-nafld-patients-associated-with-a-combination-of-metabolic-risk-factors
#2
Shilpa Tiwari-Heckler, Hongying Gan-Schreier, Wolfgang Stremmel, Walee Chamulitrat, Anita Pathil
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is associated with inefficient macro- and micronutrient metabolism, and alteration of circulating phospholipid compositions defines the signature of NAFLD. This current study aimed to assess the pattern of serum phospholipids in the spectrum of NAFLD, and its related comorbidities and genetic modifications. METHODS: 97 patients with diagnosed NAFLD were recruited at a single center during 2013⁻2016. Based on histological and transient elastography assessment, 69 patients were divided into non-alcoholic steatohepatitis (NASH) and non-alcoholic fatty liver (NAFL) subgroups...
May 21, 2018: Nutrients
https://www.readbyqxmd.com/read/29866392/lpcat3-deficiency-in-hematopoietic-cells-alters-cholesterol-and-phospholipid-homeostasis-and-promotes-atherosclerosis
#3
Charles Thomas, Antoine Jalil, Charlène Magnani, Minako Ishibashi, Ronan Queré, Thibaut Bourgeois, Victoria Bergas, Louise Ménégaut, Danish Patoli, Naig Le Guern, Jérôme Labbé, Thomas Gautier, Jean Paul Pais de Barros, Laurent Lagrost, David Masson
BACKGROUND AND AIMS: LPCAT3 plays a major role in phospholipid metabolism in the liver and intestine. However, the impact of LPCAT3 on hematopoietic cell and macrophage functions has yet to be described. Our aim was to understand the functions of LPCAT3 in macrophages and to investigate whether LPCAT3 deficiency in hematopoietic cells may affect atherosclerosis development. METHODS: Mice with constitutive Lpcat3 deficiency (Lpcat3-/- ) were generated. We used fetal hematopoietic liver cells to generate WT and Lpcat3-/- macrophages in vitro and to perform hematopoietic cell transplantation in recipient Ldlr-/- mice...
May 18, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29858391/cytochrome-c-takes-on-plasmalogen-catabolism
#4
Howard Goldfine
Plasmalogens-phospholipids containing a characteristic vinyl ether group-are precursors of lipids important for cellular signaling such as arachidonic acid. Plasmalogen catabolism involves cleavage of the vinyl ether bond, but the identity of the corresponding enzyme that cleaves the sn -1 vinyl ether bond was unknown. New research shows that cytochrome c , with some help from another lipid, catalyzes the oxidative cleavage of this bond. This discovery, and the subsequent mechanistic dissection, provides exciting new directions for lipid signaling research...
June 1, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29774334/a-comparative-study-of-epa-enriched-ethanolamine-plasmalogen-and-epa-enriched-phosphatidylethanolamine-on-a%C3%AE-42-induced-cognitive-deficiency-in-a-rat-model-of-alzheimer-s-disease
#5
Hongxia Che, Qian Li, Tiantian Zhang, Lin Ding, Lingyu Zhang, Haohao Shi, Teruyoshi Yanagita, Changhu Xue, Yaoguang Chang, Yuming Wang
Ethanolamine plasmalogen (pPE), a major phospholipid in neuronal membranes, is specifically reduced in postmortem brains from patients with Alzheimer's disease (AD). The purpose of the present study was to compare the effects of EPA-enriched ethanolamine plasmalogen (EPA-pPE) and EPA-enriched phosphatidylethanolamine (EPA-PE) on cognitive deficiency and illustrate the possible underlying mechanisms. SD rats were divided into four groups including the sham group injected with 0.9% saline and three amyloid-β (Aβ) infusion groups, Aβ42 group, EPA-pPE group and EPA-PE group...
May 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29760920/serum-lipidomics-of-bovine-paratuberculosis-disruption-of-choline-containing-glycerophospholipids-and-sphingolipids
#6
Paul L Wood, Erdal Erol, Glen F Hoffsis, Margaret Steinman, Jeroen DeBuck
Objectives: Bovine paratuberculosis is a devastating infection with Mycobacterium avium subspecies paratuberculosis that ultimately results in death from malnutrition. While the infection is characterized by a long (2-4 years) subclinical phase with immune activation, ultimately host defense mechanisms fail and the bacteria spread from the small intestine to other organs. Since both the gastrointestinal tract and liver are essential for the biosynthesis of structural glycerophospholipids, we investigated the circulating levels of these lipids in field infections and experimentally infected cattle...
2018: SAGE Open Medicine
https://www.readbyqxmd.com/read/29754010/influence-of-brain-plasmalogen-changes-on-gonadotropin-secretion-from-the-cultured-bovine-anterior-pituitary-cells
#7
O Kereilwe, K Pandey, H Kadokawa
We recently discovered that the orphan G-protein-coupled receptor (GPR) 61 colocalized with GnRH receptors (GnRHRs) on the surface of most of bovine gonadotrophs. A recent study suggested that ethanolamine plasmalogen (PI) is a ligand for GPR61 in mouse neuroblastoma. Therefore, this study evaluated the hypothesis that PI alters LH and FSH secretion from cultured bovine anterior pituitary (AP) cells. We prepared bovine AP cells from postpubertal heifers (26 mo old) and cultured the cells for 3.5 d. We treated the cells with increasing concentrations (0, 5, 50, 500, 5,000, 50,000, or 500,000 pg/mL) of phosphoethanolamine PI (PEPI) extracted from the bovine brain, or l-α-lysophosphatidylethanolamine PI (LEPI) extracted from the bovine brain, for 5 min before either no treatment or GnRH stimulation...
April 10, 2018: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/29739865/2-chlorofatty-acids-lipid-mediators-of-neutrophil-extracellular-trap-formation
#8
Elisa N D Palladino, Lalage A Katunga, Grant R Kolar, David A Ford
Neutrophils form neutrophil extracellular traps (NETs), which have been implicated in microcirculatory plugging. NET formation (NETosis) involves the fusion of granule and nuclear contents, which are then released in the extracellular space. Myeloperoxidase (MPO) plays a major role in NETosis leading to the dissociation of DNA from histones. During neutrophil activation, MPO is released and activated to convert hydrogen peroxide and chloride to hypochlorous acid (HOCl). HOCl targets plasmalogens leading to the production of the chlorinated lipids, 2-chlorofatty aldehyde (2-ClFALD) and 2-chlorofatty acid (2-ClFA)...
May 8, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29709709/tissue-selective-alteration-of-ethanolamine-plasmalogen-metabolism-in-dedifferentiated-colon-mucosa
#9
Daniel H Lopez, Joan Bestard-Escalas, Jone Garate, Albert Maimó-Barceló, Roberto Fernández, Rebeca Reigada, Sam Khorrami, Daniel Ginard, Toshiro Okazaki, José A Fernández, Gwendolyn Barceló-Coblijn
Human colon lipid analysis by imaging mass spectrometry (IMS) demonstrates that the lipid fingerprint is highly sensitive to a cell's pathophysiological state. Along the colon crypt axis, and concomitant to the differentiation process, certain lipid species tightly linked to signaling (phosphatidylinositols and arachidonic acid (AA)-containing diacylglycerophospholipids), change following a rather simple mathematical expression. We extend here our observations to ethanolamine plasmalogens (PlsEtn), a unique type of glycerophospholipid presenting a vinyl ether linkage at sn-1 position...
April 27, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29709080/lipidomic-study-of-precursors-of-endocannabinoids-in-freshwater-bryozoan-pectinatella-magnifica
#10
Tomáš Řezanka, Milada Vítová, Jaromír Lukavský, Karel Sigler
Freshwater bryozoan Pectinatella magnifica was collected from a sand pit (South Bohemia). The total lipids after extraction from lyophilized bryozoans were analyzed using high-performance liquid chromatography/high-resolution negative tandem electrospray mass spectrometry. A total of 19 lipid classes were identified, including N-acyl-substituted phospholipids, that is, N-acylphosphatidylethanolamine and N-acylphosphatidylserine in their plasmenyl forms. Based on gas chromatography/mass spectrometry of 3-pyridylcarbonyl (picolinyl) esters, a very unusual fatty acid was identified, namely 24:7n-3 (all-cis-3,6,9,12,15,18,21-tetracosaheptaenoic acid)...
April 30, 2018: Lipids
https://www.readbyqxmd.com/read/29695975/characterizing-the-key-metabolic-pathways-of-the-neonatal-mouse-heart-using-a-quantitative-combinatorial-omics-approach
#11
Maciej M Lalowski, Susann Björk, Piet Finckenberg, Rabah Soliymani, Miikka Tarkia, Giulio Calza, Daria Blokhina, Sari Tulokas, Matti Kankainen, Päivi Lakkisto, Marc Baumann, Esko Kankuri, Eero Mervaala
The heart of a newborn mouse has an exceptional capacity to regenerate from myocardial injury that is lost within the first week of its life. In order to elucidate the molecular mechanisms taking place in the mouse heart during this critical period we applied an untargeted combinatory multiomics approach using large-scale mass spectrometry-based quantitative proteomics, metabolomics and mRNA sequencing on hearts from 1-day-old and 7-day-old mice. As a result, we quantified 1.937 proteins (366 differentially expressed), 612 metabolites (263 differentially regulated) and revealed 2...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29628048/comprehensive-study-of-rodent-olfactory-tissue-lipid-composition
#12
Anne Marie Le Bon, Nicolas Deprêtre, Estelle Sibille, Stéphanie Cabaret, Stéphane Grégoire, Vanessa Soubeyre, Elodie Masson, Niyazi Acar, Lionel Bretillon, Xavier Grosmaitre, Olivier Berdeaux
The peripheral olfactory tissue (OT) plays a primordial role in the detection and transduction of olfactory information. Recent proteomic and transcriptomic studies have provided valuable insight into proteins and RNAs expressed in this tissue. Paradoxically, there is little information regarding the lipid composition of mammalian OT. To delve further into this issue, using a set of complementary state-of-the-art techniques, we carried out a comprehensive analysis of OT lipid composition in rats and mice fed with standard diets...
April 2018: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29627763/-lipid-raft-aging-in-the-human-frontal-cortex-during-nonpathological-aging-gender-influences-and-potential-implications-in-alzheimer-s-disease
#13
Mario Díaz, Noemí Fabelo, Isidre Ferrer, Raquel Marín
Lipid rafts are highly dynamic membrane domains featured by distinctive biochemical composition and physicochemical properties compared with the surrounding plasma membrane. These microstructures are associated not only with cellular signaling and communication in normal nerve cells but also with pathological processing of amyloid precursor protein in Alzheimer's disease. Using lipid rafts isolated from human frontal cortex in nondemented subjects aging 24 to 85 years, we demonstrate here that lipid structure of lipid rafts undergo significant alterations of specific lipid classes and phospholipid-bound fatty acids as brain cortex correlating with aging...
July 2018: Neurobiology of Aging
https://www.readbyqxmd.com/read/29557170/substantial-decrease-in-plasmalogen-in-the-heart-associated-with-tafazzin-deficiency
#14
Tomohiro Kimura, Atsuko K Kimura, Mindong Ren, Bob Berno, Yang Xu, Michael Schlame, Richard M Epand
Tafazzin is the mitochondrial enzyme that catalyzes transacylation between a phospholipid and a lysophospholipid in remodeling. Mutations in tafazzin cause Barth syndrome, a potentially life-threatening disease with the major symptom being cardiomyopathy. In the tafazzin-deficient heart, cardiolipin (CL) acyl chains become abnormally heterogeneous unlike those in the normal heart with a single dominant linoleoyl species, tetralinoleoyl CL. In addition, the amount of CL decreases and monolysocardiolipin (MLCL) accumulates...
April 10, 2018: Biochemistry
https://www.readbyqxmd.com/read/29540574/quantitative-structural-multiclass-lipidomics-using-differential-mobility-electron-impact-excitation-of-ions-from-organics-eieio-mass-spectrometry
#15
Takashi Baba, J Larry Campbell, J C Yves Le Blanc, Paul R S Baker, Kazutaka Ikeda
We report a method for comprehensive structural characterization of lipids in animal tissues using a combination of differential ion mobility spectrometry (DMS) with electron-impact excitation of ions from organics (EIEIO) mass spectrometry. Singly charged lipid ions in protonated or sodiated forms were dissociated by an electron beam having a kinetic energy of 10 eV in a branched radio-frequency ion trap. We established a comprehensive set of diagnostics to characterize the structures of glycerophospholipids, sphingolipids, and acylglycerols, including glycosylated, plasmalogen, and ester forms...
May 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29540573/a-novel-assay-for-the-introduction-of-the-vinyl-ether-double-bond-into-plasmalogens-using-pyrene-labeled-substrates
#16
Ernst R Werner, Markus A Keller, Sabrina Sailer, Daniele Seppi, Georg Golderer, Gabriele Werner-Felmayer, Raphael A Zoeller, Katrin Watschinger
Plasmanylethanolamine desaturase (PEDS) (EC 1.14.99.19) introduces the 1-prime double bond into plasmalogens, one of the most abundant phospholipids in the human body. This labile membrane enzyme has not been purified and its coding sequence is unknown. Previous assays for this enzyme used radiolabeled substrates followed by multistep processing. We describe here a straight-forward method for the quantification of PEDS in enzyme incubation mixtures using pyrene-labeled substrates and reversed-phase HPLC with fluorescence detection...
May 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29530984/cytochrome-c-is-an-oxidative-stress-activated-plasmalogenase-that-cleaves-plasmenylcholine-and-plasmenylethanolamine-at-the-sn-1-vinyl-ether-linkage
#17
Christopher M Jenkins, Kui Yang, Gaoyuan Liu, Sung Ho Moon, Beverly G Dilthey, Richard W Gross
Plasmalogens are phospholipids critical for cell function and signaling that contain a vinyl-ether linkage at the   sn -1 position and are highly enriched in arachidonic acid (AA) at the sn -2 position. However, the enzyme(s) responsible for the cleavage of the vinyl ether linkage in plasmalogens has remained elusive.  Herein, we report that cytochrome c , in the presence of either cardiolipin (CL), O2 and H2 O2 , or oxidized CL and O2 , catalyzes the oxidation of the plasmalogen vinyl ether linkage, promoting its hydrolytic cleavage and resultant production of 2-AA-lysolipids and highly reactive α-hydroxy fatty aldehydes...
March 12, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29523943/characterization-of-potential-plasma-biomarkers-related-to-cognitive-impairment-by-untargeted-profiling-of-phospholipids-using-the-hilic-esi-it-tof-ms-system
#18
Shuang Song, Ling-Zhi Cheong, Qing-Qing Man, Shao-Jie Pang, Yue-Qi Li, Biao Ren, Jian Zhang
Early diagnosis of neural changes causing cognitive impairment is critical for development of preventive therapies for dementia. Biomarkers currently characterized cannot be extensively applied due to the invasive sampling of cerebrospinal fluid. The other imaging approaches are either expensive or require a high technique. Phospholipids (PLs), which are basic constituents of neurons, might be a key variable in the pathogenesis of cognitive impairment. Changes in plasma PL provide the possibility for development of novel biomarkers with minimal invasion and high patient acceptance...
May 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29514688/plasmalogen-lipids-functional-mechanism-and-their-involvement-in-gastrointestinal-cancer
#19
REVIEW
Márcia Cristina Fernandes Messias, Giovana Colozza Mecatti, Denise Gonçalves Priolli, Patrícia de Oliveira Carvalho
The plasmalogens are a class of glycerophospholipids which contain a vinyl-ether and an ester bond at the sn-1 and sn-2 positions, respectively, in the glycerol backbone. They constitute 10 mol% of the total mass of phospholipids in humans, mainly as membrane structure components. Plasmalogens are important for the organization and stability of lipid raft microdomains and cholesterol-rich membrane regions involved in cellular signaling. In addition to their structural roles, a subset of ether lipids are thought to function as endogenous antioxidants and emerging studies suggest that they are involved in cell differentiation and signaling pathways...
March 7, 2018: Lipids in Health and Disease
https://www.readbyqxmd.com/read/29500230/ethanolamine-phosphotransferase-1-selenoprotein-i-is-critical-for-the-neural-development-and-maintenance-of-plasmalogen-in-human
#20
Yasuhiro Horibata, Orly Elpeleg, Ayelet Eran, Yoshio Hirabayashi, David Savitzki, Galit Tal, Hanna Mandel, Hiroyuki Sugimoto
Ethanolamine phosphotransferase 1 (EPT1), also known as selenoprotein 1 (SELENOI), is an enzyme that transfers phosphoethanolamine from cytidine diphosphate (CDP)-ethanolamine to lipid acceptors to produce ethanolamine glycerophospholipids such as diacyl-linked phosphatidylethanolamine (PE) and ether-linked plasmalogen (plasmenyl-PE). However, to date there has been no analysis of the metabolomic consequence of the mutation of EPT1 on the concentration of ethanolamine glycerophospholipids in mammalian cells...
March 2, 2018: Journal of Lipid Research
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