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Lipidomics

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https://www.readbyqxmd.com/read/29352432/effect-of-membrane-composition-on-receptor-association-implications-of-cancer-lipidomics-on-erbb-receptors
#1
REVIEW
Aiswarya B Pawar, Durba Sengupta
The association of single transmembrane receptors, such as the ErbB receptors is a key event in initiating cell signaling networks. The interactions between these receptors have been well characterized for both ligand-driven and pre-formed dimers. However, the role of the membrane in modulating association is less well understood and assumes greater importance in light of altered membrane composition in diseased states. Here, we discuss how membrane composition has been observed to induce both structural and dynamic differences in receptor association...
January 19, 2018: Journal of Membrane Biology
https://www.readbyqxmd.com/read/29350075/characterization-of-the-proteome-and-lipidome-profiles-of-human-lung-cells-after-low-dose-and-chronic-exposure-to-multiwalled-carbon-nanotubes
#2
Santosh Phuyal, Mayes Kasem, Oskar Knittelfelder, Animesh Sharma, Davi de Miranda Fonseca, Vaineta Vebraite, Sergey Shaposhnikov, Geir Slupphaug, Vidar Skaug, Shanbeh Zienolddiny
The effects of long-term chronic exposure of human lung cells to multi-walled carbon nanotubes (MWCNT) and their impact upon cellular proteins and lipids were investigated. Since the lung is the major target organ, an in vitro normal bronchial epithelial cell line model was used. Additionally, to better mimic exposure to manufactured nanomaterials at occupational settings, cells were continuously exposed to two non-toxic and low doses of a MWCNT for 13-weeks. MWCNT-treatment increased ROS levels in cells without increasing oxidative DNA damage and resulted in differential expression of multiple anti- and pro-apoptotic proteins...
January 19, 2018: Nanotoxicology
https://www.readbyqxmd.com/read/29342349/membrane-allostery-and-unique-hydrophobic-sites-promote-enzyme-substrate-specificity
#3
Varnavas D Mouchlis, Yuan Chen, J Andrew McCammon, Edward A Dennis
We demonstrate that lipidomics coupled with molecular dynamics reveals unique phospholipase A2 specificity toward membrane phospholipid substrates. We discovered unexpected head-group and acyl-chain specificity for three-major human phospholipases A2. These differences between each enzyme's specificity coupled with molecular dynamicsbased structural and binding studies revealed unique active site and interfacial surface binding moieties for each enzyme that explains the observed specificity at a hitherto inaccessible structural level...
January 17, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29342096/high-resolution-lipidomics-of-the-early-life-stages-of-the-red-seaweed-porphyra-dioica
#4
Elisabete da Costa, Vitor Azevedo, Tânia Melo, Andreia M Rego, Dmitry V Evtuguin, Pedro Domingues, Ricardo Calado, Rui Pereira, Maria H Abreu, Maria R Domingues
Porphyra dioica is a commercial seaweed consumed all over the world, mostly in the shape of nori sheets used for "sushi" preparation. It is a well-known part of the Asian diet with health benefits, which have been associated, among others, to the high levels of n-3 and n-6 fatty acids in this red alga. However, other highly valued lipids of Porphyra are polar lipids that remain largely undescribed and can have both nutritional value and bioactivity, thus could contribute to the valorization of this seaweed...
January 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29341601/determining-double-bond-position-in-lipids-using-online-ozonolysis-coupled-to-liquid-chromatography-and-ion-mobility-mass-spectrometry
#5
Rachel A Harris, Jody C May, Craig A Stinson, Yu Xia, John A McLean
The increasing focus on lipid metabolism has revealed a need for analytical techniques capable of structurally characterizing lipids with a high degree of specificity. Lipids can exist as any one of a large number of double bond positional isomers, which are indistinguishable by single-stage mass spectrometry alone. Ozonolysis reactions coupled to mass spectrometry have previously been demonstrated as a means for localizing double bonds in unsaturated lipids. Here we describe an online, solution-phase reactor using ozone produced via a low-pressure mercury lamp, which generates aldehyde products diagnostic of cleavage at a particular double bond position...
January 17, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29341265/cicatricial-alopecia-research-foundation-meeting-may-2016-progress-towards-the-diagnosis-treatment-and-cure-of-primary-cicatricial-alopecias
#6
John P Sundberg, Maria K Hordinsky, Wilma Bergfeld, Yolanda M Lenzy, Amy J McMichael, Angela M Christiano, Tracy McGregor, Kurt S Stenn, Raja K Sivamani, C Herbert Pratt, Lloyd E King
Primary Cicatricial Alopecias (PCAs) are a group of skin diseases in which there is progressive and permanent destruction of hair follicles followed by replacement with fibrous tissue. Unfortunately, by the time patients seek clinical evaluation of their hair loss, the skin is already inflamed and/or scarred, so there is little hope for a return to their normal hair growth pattern. Clinical and basic science investigations are now focusing on three forms of human PCA, lichen planopilaris (LPP), frontal fibrosing alopecia (FFA), and central centrifugal cicatricial alopecia (CCCA)...
January 16, 2018: Experimental Dermatology
https://www.readbyqxmd.com/read/29335545/an-aberrant-srebp-dependent-lipogenic-program-promotes-metastatic-prostate-cancer
#7
Ming Chen, Jiangwen Zhang, Katia Sampieri, John G Clohessy, Lourdes Mendez, Enrique Gonzalez-Billalabeitia, Xue-Song Liu, Yu-Ru Lee, Jacqueline Fung, Jesse M Katon, Archita Venugopal Menon, Kaitlyn A Webster, Christopher Ng, Maria Dilia Palumbieri, Moussa S Diolombi, Susanne B Breitkopf, Julie Teruya-Feldstein, Sabina Signoretti, Roderick T Bronson, John M Asara, Mireia Castillo-Martin, Carlos Cordon-Cardo, Pier Paolo Pandolfi
Lipids, either endogenously synthesized or exogenous, have been linked to human cancer. Here we found that PML is frequently co-deleted with PTEN in metastatic human prostate cancer (CaP). We demonstrated that conditional inactivation of Pml in the mouse prostate morphs indolent Pten-null tumors into lethal metastatic disease. We identified MAPK reactivation, subsequent hyperactivation of an aberrant SREBP prometastatic lipogenic program, and a distinctive lipidomic profile as key characteristic features of metastatic Pml and Pten double-null CaP...
January 15, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29330355/fatty-acids-and-related-lipid-mediators-in-the-regulation-of-cutaneous-inflammation
#8
REVIEW
Magdalena Kiezel-Tsugunova, Alexandra C Kendall, Anna Nicolaou
Human skin has a distinct profile of fatty acids and related bioactive lipid mediators that regulate many aspects of epidermal and dermal homeostasis, including immune and inflammatory reactions. Sebum lipids act as effective antimicrobial agents, shape immune cell communications and contribute to the epidermal lipidome. The essential fatty acid linoleic acid is crucial for the structure of the epidermal barrier, while polyunsaturated fatty acids act as precursors to eicosanoids, octadecanoids and docosanoids through cyclooxygenase, lipoxygenase and cytochrome P450 monooxygenase-mediated reactions, and endocannabinoids and N-acyl ethanolamines...
January 12, 2018: Biochemical Society Transactions
https://www.readbyqxmd.com/read/29324762/obesogenic-diets-alter-metabolism-in-mice
#9
Megan R Showalter, Eric B Nonnecke, A L Linderholm, Tomas Cajka, Michael R Sa, Bo Lönnerdal, Nicholas J Kenyon, Oliver Fiehn
Obesity and accompanying metabolic disease is negatively correlated with lung health yet the exact mechanisms by which obesity affects the lung are not well characterized. Since obesity is associated with lung diseases as chronic bronchitis and asthma, we designed a series of experiments to measure changes in lung metabolism in mice fed obesogenic diets. Mice were fed either control or high fat/sugar diet (45%kcal fat/17%kcal sucrose), or very high fat diet (60%kcal fat/7% sucrose) for 150 days. We performed untargeted metabolomics by GC-TOFMS and HILIC-QTOFMS and lipidomics by RPLC-QTOFMS to reveal global changes in lung metabolism resulting from obesity and diet composition...
2018: PloS One
https://www.readbyqxmd.com/read/29320510/adipose-tissue-atgl-modifies-the-cardiac-lipidome-in-pressure-overload-induced-left-ventricular-failure
#10
Janek Salatzki, Anna Foryst-Ludwig, Kajetan Bentele, Annelie Blumrich, Elia Smeir, Zsofia Ban, Sarah Brix, Jana Grune, Niklas Beyhoff, Robert Klopfleisch, Sebastian Dunst, Michal A Surma, Christian Klose, Michael Rothe, Frank R Heinzel, Alexander Krannich, Erin E Kershaw, Dieter Beule, P Christian Schulze, Nikolaus Marx, Ulrich Kintscher
Adipose tissue lipolysis occurs during the development of heart failure as a consequence of chronic adrenergic stimulation. However, the impact of enhanced adipose triacylglycerol hydrolysis mediated by adipose triglyceride lipase (ATGL) on cardiac function is unclear. To investigate the role of adipose tissue lipolysis during heart failure, we generated mice with tissue-specific deletion of ATGL (atATGL-KO). atATGL-KO mice were subjected to transverse aortic constriction (TAC) to induce pressure-mediated cardiac failure...
January 10, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29317027/identification-of-potential-sphingomyelin-markers-for-the-estimation-of-hematocrit-in-dried-blood-spots-via-a-lipidomic-strategy
#11
Hsiao-Wei Liao, Shu-Wen Lin, Ya-Ting Lin, Ching-Hua Lee, Ching-Hua Kuo
The dried blood spot (DBS) strategy is a convenient and minimally invasive approach to blood sampling. Due to its various advantages, this sampling technique has drawn significant attention in recent years. Hematocrit (HCT)-associated bias is one of the main obstacles that hinder wider DBS application in clinical practice. An accurate HCT estimation method could help calibrate HCT-associated bias and improve the quantification accuracy. This study used a lipidomics profiling strategy to identify HCT estimation markers using liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS), which provided advantages including the potential for the simultaneous measurements of target drug and HCT values...
March 20, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29316682/effect-of-omega-3-fatty-acid-supplementation-on-oxylipins-in-a-routine-clinical-setting
#12
Christoph Schmöcker, Ingrid W Zhang, Stefanie Kiesler, Ursula Kassner, Annika I Ostermann, Elisabeth Steinhagen-Thiessen, Nils H Schebb, Karsten-H Weylandt
Omega-6 polyunsaturated fatty acid (n-6 PUFA) is the predominant polyunsaturated fatty acid (PUFA), especially in Western diet. A high omega-6/omega-3 ratio in Western diets is implicated in the development of cardiovascular diseases and inflammatory processes. Studies in animal models and in humans have demonstrated beneficial effects of omega-3 PUFA (n-3 PUFA) in a variety of diseases, including cardiac arrhythmias and inflammatory diseases, as well as breast and colon cancer. The molecular mechanisms underlying the effects of n-3 PUFA are still not well understood...
January 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29306452/plasma-lipidome-patterns-associated-with-cardiovascular-risk-in-the-predimed-trial-a-case-cohort-study
#13
Cristina Razquin, Liming Liang, Estefanía Toledo, Clary B Clish, Miguel Ruiz-Canela, Yan Zheng, Dong D Wang, Dolores Corella, Olga Castaner, Emilio Ros, Fernando Aros, Enrique Gomez-Gracia, Miquel Fiol, José Manuel Santos-Lozano, Marta Guasch-Ferre, Lluis Serra-Majem, Aleix Sala-Vila, Pilar Buil-Cosiales, Monica Bullo, Montserrat Fito, Olga Portoles, Ramon Estruch, Jordi Salas-Salvado, Frank B Hu, Miguel A Martinez-Gonzalez
BACKGROUND: The study of the plasma lipidome may help to better characterize molecular mechanisms underlying cardiovascular disease. The identification of new lipid biomarkers could provide future targets for prevention and innovative therapeutic approaches. In the frame of the PREDIMED trial, our aim was to examine the associations of baseline lipidome patterns or their changes with the risk of clinical CVD events. METHODS: We included 983 participants in our case-cohort study...
February 15, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29305840/a-rapid-method-for-identification-and-quantification-of-prostaglandins-in-cerebral-tissues-by-hplc-esi-ms-ms-for-the-lipidomic-in-vivo-studies
#14
Luciana Assis Gobo, Leandro Machado de Carvalho, Fernanda Temp, Carine Viana, Carlos Fernando Mello
An analytical method utilizing liquid chromatography coupled to mass spectrometry with electrospray ionization has been developed for the identification of prostaglandins (PGs) in cerebral tissues. The five compounds identified (thromboxane B2, prostaglandin E2, prostaglandin D2, 6-keto-prostaglandin F1 alpha and prostaglandin F2 alpha) are cellular mediators of inflammation and are involved in a variety of physiological and pathological processes by acting on membrane receptors on the surfaces of target cells...
January 3, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29305510/lipidomics-of-thalassiosira-pseudonana-under-phosphorus-stress-reveal-underlying-phospholipid-substitution-dynamics-and-novel-diglycosylceramide-substitutes
#15
Jonathan E Hunter, Joost Brandsma, Marcus K Dymond, Grielof Koster, C Mark Moore, Anthony D Postle, Rachel A Mills, George S Attard
Phytoplankton substitute phosphorus (P) containing lipids with non-P analogues boosting growth in P-limited oceans. In the model diatom Thalassiosira pseudonana, lipid headgroup substitution dynamics are well described, but those of the individual lipids, varying in fatty acids, are unknown. Moreover, the behaviour of lipids outside of the common headgroup classes, and the relationship between lipid substitution and cellular particulate organic P (POP) are yet to be reported. We investigated these through the mass spectrometric lipidomics of P replete (P+) and depleted (P-) T...
January 5, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29301865/analysis-of-hydroxyeicosatetraenoic-acids-hetes-in-human-whole-blood-by-chiral-ultrahigh-performance-liquid-chromatgraphy-uhplc-electron-capture-atmospheric-pressure-chemical-ionization-high-resolution-mass-spectrometry-ecapci-hrms
#16
Liudmila L Mazaleuskaya, Ashkan Salamatipour, Dimitra Sarantopoulou, Liwei Weng, Garret A FitzGerald, Ian A Blair, Clementina Mesaros
The biosynthesis of eicosanoids occurs enzymatically via lipoxygenases (LOXs), cyclooxygenases (COXs), and cytochrome P450, or through non-enzymatic free radical reactions. The enzymatic routes are highly enantiospecific. Chiral separation and high sensitivity detection methods are required to differentiate and quantify enantioselective HETEs (hydroxy-(5Z,8Z,11Z,13E)-eicosatetraenoic acids) in complex biological fluids. We report here a targeted chiral lipidomics analysis of human blood using ultrahigh performance liquid chromatgraphy (UHPLC)-electron capture atmospheric pressure chemical ionization/high resolution mass spectrometry (ECAPCI/HRMS)...
January 4, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29301511/a-quantitative-multimodal-metabolomic-assay-for-colorectal-cancer
#17
Farshad Farshidfar, Karen A Kopciuk, Robert Hilsden, S Elizabeth McGregor, Vera C Mazurak, W Donald Buie, Anthony MacLean, Hans J Vogel, Oliver F Bathe
BACKGROUND: Early diagnosis of colorectal cancer (CRC) simplifies treatment and improves treatment outcomes. We previously described a diagnostic metabolomic biomarker derived from semi-quantitative gas chromatography-mass spectrometry. Our objective was to determine whether a quantitative assay of additional metabolomic features, including parts of the lipidome could enhance diagnostic power; and whether there was an advantage to deriving a combined diagnostic signature with a broader metabolomic representation...
January 4, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29299119/identifying-mitotane-induced-mitochondria-associated-membranes-dysfunctions-metabolomic-and-lipidomic-approaches
#18
Ségolène Hescot, Larbi Amazit, Marie Lhomme, Simon Travers, Anais DuBow, Stephanie Battini, Geoffrey Boulate, Izzie Jacques Namer, Anne Lombes, Anatol Kontush, Alessio Imperiale, Eric Baudin, Marc Lombes
Mitotane (o,p'DDD), the most effective drug in adrenocortical carcinoma, concentrates into the mitochondria and impacts mitochondrial functions. To address the molecular mechanisms of mitotane action and to identify its potential target, metabolomic and lipidomic approaches as well as imaging analyses were employed in human adrenocortical H295R cells allowing identification of Mitochondria-Associated Membranes dysfunction as a critical impact of mitotane. Study of intracellular energetic metabolites by NMR spectroscopy showed that mitotane significantly decreased aspartate while concomitantly increased glutamate content in a time- and concentration-dependent manner...
December 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/29297991/application-of-lipidomics-to-reveal-differences-in-facial-skin-surface-lipids-between-males-and-females
#19
Le Cui, Cong-Fen He, Lin-Na Fan, Yan Jia
PURPOSE: To analyze and compare differences in facial skin surface lipids (SSL) between 18- to 25-year-old males and females. METHODS: Ultra-performance liquid chromatography quadrupole time of flight mass spectrometry (UPLC-Q-TOF-MS) technology was used to measure the facial SSL composition of 18- to 25-year-old males and females. Measurement results were combined with the orthogonal projections to latent structures discriminant analysis (OPLS-DA) model for analysis and comparisons, and differences in lipids with significance were selected...
January 3, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29296211/global-lipidomics-identified-plasma-lipids-as-novel-biomarkers-for-early-detection-of-lung-cancer
#20
Zongtao Yu, Hankui Chen, Junmei Ai, Yong Zhu, Yan Li, Jeffrey A Borgia, Jin-Song Yang, Jicai Zhang, Bin Jiang, Wei Gu, Youping Deng
Purpose: Lipids play roles in membrane structure, energy storage, and signal transduction as well as in human cancers. Here we adopt lipidomics to identify plasma lipid markers for early screening and detection of lung cancer. Experimental Design: Using mass spectrometry, we profiled 390 individual lipids using training and validation strategy in a total of 346 plasma samples from 199 early NSCLC patients, including 113 adenocacinoma and 86 squamous cell cancers (SqCC), and from 147 healthy controls...
December 8, 2017: Oncotarget
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