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Lipid infusion

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https://www.readbyqxmd.com/read/28106559/abca1-deficiency-affects-basal-cognitive-deficits-and-dendritic-density-in-mice
#1
Nicholas F Fitz, Alexis Y Carter, Victor Tapias, Emilie L Castranio, Ravindra Kodali, Iliya Lefterov, Radosveta Koldamova
ATP-binding cassette transporter A1 (ABCA1) mediates cholesterol efflux to lipid-free apolipoproteins and regulates the generation of high density lipoproteins. Previously, we have shown that lack of Abca1 significantly increases amyloid deposition and cognitive deficits in Alzheimer's disease model mice expressing human amyloid-β protein precursor (APP). The goal of this study was to determine if ABCA1 plays a role in memory deficits caused by amyloid-β (Aβ) oligomers and examine neurite architecture of pyramidal hippocampal neurons...
January 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28102538/comparing-early-liver-graft-function-from-heart-beating-and-living-donors-a-pilot-study-aiming-to-identify-new-biomarkers-of-liver-injury
#2
Qi Joy Yang, Michael Kluger, Krzysztof Goryński, Janusz Pawliszyn, Barbara Bojko, Ai-Ming Yu, Keumhan Noh, Markus Selzner, Angela Jerath, Stuart McCluskey, K Sandy Pang, Marcin Wąsowicz
: Liver and kidney functions among recipients of liver transplantation (LT) surgery with heart beating (HBD, n = 13) or living donors (LD, n = 9) with different cold ischemic times were examined during the neohepatic phase for clearing rocuronium bromide (ROC, cleared by liver and kidney) and tranexamic acid (TXA, cleared by kidney). Solid phase micro-extraction and LC-MS/MS was applied to determine the plasma concentrations of ROC and TXA, and creatinine was determined by standard laboratory methods...
January 19, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28097705/non-polar-lipids-accumulate-during-storage-of-transfusion-products-and-do-not-contribute-to-the-onset-of-transfusion-related-acute-lung-injury
#3
A L Peters, M A T Vervaart, R van Bruggen, D de Korte, R Nieuwland, W Kulik, A P J Vlaar
BACKGROUND AND OBJECTIVES: The accumulation of non-polar lipids arachidonic acid, 5-hydroxyeicosatetraenoic acid (HETE), 12-HETE and 15-HETE during storage of transfusion products may play a role in the onset of transfusion-related acute lung injury (TRALI), a syndrome of respiratory distress after transfusion. MATERIALS AND METHODS: We investigated non-polar lipid accumulation in red blood cells (RBCs) stored for 42 days, plasma stored for 7 days at either 4 or 20°C and platelet (PLT) transfusion products stored for 7 days...
January 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28095749/obese-adolescents-with-polycystic-ovarian-syndrome-have-elevated-cardiovascular-disease-risk-markers
#4
Sonali S Patel, Uyen Truong, Martina King, Annie Ferland, Kerrie L Moreau, Jennifer Dorosz, John E Hokanson, Hong Wang, Gregory L Kinney, David M Maahs, Robert H Eckel, Kristen J Nadeau, Melanie Cree-Green
Women with polycystic ovarian syndrome (PCOS) have evidence of subclinical cardiovascular disease (CVD). However, insulin resistance, an important factor in the development of CVD in adults, is common in adolescents with PCOS, yet data in adolescents are limited. Therefore, we sought to measure insulin resistance and CVD markers in obese youth with and without PCOS. Thirty-six PCOS and 17 non-PCOS adolescent girls who were obese, sedentary, and non-hypertensive were recruited from clinics located within the Children's Hospital Colorado...
January 1, 2017: Vascular Medicine
https://www.readbyqxmd.com/read/28079878/a-complete-workflow-for-high-resolution-spectral-stitching-nanoelectrospray-direct-infusion-mass-spectrometry-based-metabolomics-and-lipidomics
#5
Andrew D Southam, Ralf J M Weber, Jasper Engel, Martin R Jones, Mark R Viant
Metabolomic and lipidomic studies measure and discover metabolic and lipid profiles in biological samples, enabling a better understanding of the metabolism of specific biological phenotypes. Accurate biological interpretations require high analytical reproducibility and sensitivity, and standardized and transparent data processing. Here we describe a complete workflow for nanoelectrospray ionization (nESI) direct-infusion mass spectrometry (DIMS) metabolomics and lipidomics. After metabolite and lipid extraction from tissues and biofluids, samples are directly infused into a high-resolution mass spectrometer (e...
February 2016: Nature Protocols
https://www.readbyqxmd.com/read/28078602/sulfatides-primarily-exist-in-the-substantia-nigra-region-of-mouse-brain-tissue
#6
Kab-Tae Park, Jong Cheol Shon, Ji-Eun Kim, Gyu Hwan Park, Hyun Jin Choi, Kwang-Hyeon Liu
Lipid distribution in the brain is important for many biological functions and has been associated with some brain diseases. The aim of this study was to investigate lipid distribution in different regions of brain tissue in mice. To this end, substantia nigra (SN), caudate putamen (CPu), hippocampus (Hip), hypothalamus (Hyp), and cortex (Cx) tissues of mice were analyzed using direct infusion nanoelectrospray-ion trap mass spectrometry and multivariate analyses. The SN, CPu, Hip, Hyp, and Cx groups showed clear differences in lipid distribution using principal component analysis and a partial least-squares discriminant analysis score plot, and lipid levels were significantly different in different brain regions...
January 11, 2017: Lipids
https://www.readbyqxmd.com/read/28078385/glucose-and-fatty-acids-synergistically-and-reversibly-promote-beta-cell-proliferation-in-rats
#7
Valentine S Moullé, Kevin Vivot, Caroline Tremblay, Bader Zarrouki, Julien Ghislain, Vincent Poitout
AIMS/HYPOTHESIS: The mechanisms underlying pancreatic islet mass expansion have attracted considerable interest as potential therapeutic targets to prevent or delay the onset of type 2 diabetes. While several factors promoting beta cell proliferation have been identified, in the context of nutrient excess the roles of glucose or NEFA in relation to insulin resistance remain unclear. Here we tested the hypothesis that glucose and NEFA synergistically and reversibly promote beta cell proliferation in the context of nutrient-induced insulin resistance...
January 11, 2017: Diabetologia
https://www.readbyqxmd.com/read/28077357/triglyceride-rich-lipoprotein-lipolysis-products-increase-blood-brain-barrier-transfer-coefficient-and-induce-astrocyte-lipid-droplets-and-cell-stress
#8
Linda L Lee, Hnin Hnin Aung, Dennis W Wilson, Steven E Anderson, John C Rutledge, Jennifer M Rutkowsky
Elevation of blood triglycerides, primarily as triglyceride-rich lipoproteins (TGRL), has been linked to cerebrovascular inflammation, vascular dementia, and Alzheimer's disease (AD). Brain microvascular endothelial cells and astrocytes, two cell components of the neurovascular unit, participate in controlling blood-brain barrier (BBB) permeability and regulating neurovascular unit homeostasis. Our studies showed that infusion of high physiological concentrations of TGRL lipolysis products (TGRL + lipoprotein lipase) activate and injure brain endothelial cells and transiently increases the BBB transfer coefficient (Ki=permeability x surface area/volume) in vivo...
January 11, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28075214/intralipid-vehicle-does-not-interfere-with-the-efficacy-of-progesterone-in-attenuating-edema-following-tbi
#9
Bushra Wali, Donald Stein, Iqbal Sayeed
The recent disappointing results of Phase 3 trials for progesterone (PROG) in traumatic brain injury (TBI) have triggered speculation about reasons for the negative outcomes. One confounding factor may have been the vehicle used to administer PROG. Virtually all of the many preclinical experiments informing the clinical trials and reporting beneficial PROG effects used more soluble 2-hydroxypropyl-b-cyclodextrin (HBC) as a vehicle given intraperitoneally or subcutaneously rather than a lipid formulation given intravenously (i...
January 11, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28073779/glucose-dependent-insulinotropic-polypeptide-promotes-lipid-deposition-in-subcutaneous-adipocytes-in-obese-type-2-diabetes-patients-a-maladaptive-response
#10
Sravan K Thondam, Christina Daousi, John P H Wilding, Jens J Holst, Gulizar I Ameen, Chenjing Yang, Catherine Whitmore, Silvia Mora, Daniel J Cuthbertson
: Glucose-dependent insulinotropic polypeptide (GIP) beyond its insulinotropic effects may regulate post-prandial lipid metabolism. While the insulinotropic action of GIP is known to be impaired in type 2 diabetes mellitus (T2DM), its adipogenic effect is unknown. We hypothesised GIP is anabolic in human subcutaneous adipose tissue (SAT) promoting triacylglycerol (TAG) deposition through re-esterification of non-esterified fatty acids (NEFA) and this effect may differ according to obesity status or glucose tolerance...
January 10, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28069899/lps-infusion-suppresses-serum-fgf21-levels-in-healthy-adult-volunteers
#11
Esben Stistrup Lauritzen, Nikolaj Rittig, Ermina Bach, Niels Moller, Mette Bjerre
CONTEXT: During the inflammatory acute phase response plasma glucose and serum triglycerides are increased in humans. Fibroblast growth factor (FGF) 21 has plasma glucose and lipid reducing actions, but its role in the acute inflammatory response in human is unknown. OBJECTIVE: To investigate circulating levels of FGF21 after lipopolysaccharide (LPS) infusion. DESIGN: Two randomized, single blinded, placebo-controlled crossover trials were used...
January 9, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28069582/human-apolipoprotein-a-i-exerts-a-prophylactic-effect-on-high-fat-diet-induced-atherosclerosis-via-inflammation-inhibition-in-a-rabbit-model
#12
Jiyang Li, Weina Wang, Lei Han, Meiqing Feng, Hui Lu, Li Yang, Xiangxiang Hu, Si Shi, Shanshan Jiang, Qian Wang, Li Ye
Apolipoprotein A-I (apoA-I) is the major functional protein fraction of high-density lipoprotein. The prophylactic effect and mechanism of human apoA-I on atherosclerosis (AS) were investigated in a high-fat diet-induced AS rabbit model. The rabbits were injected with apoA-I once a week while fed high-fat diet for 20 weeks. Our results showed that apoA-I could raise the serum level of high-density lipoprotein-cholesterol and reduce those of lipid total cholesterol, triglyceride, and low-density lipoprotein-cholesterol in AS rabbits...
January 8, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28064014/gpr55-agonist-lysophosphatidylinositol-and-lysophosphatidylcholine-inhibit-endothelial-cell-hyperpolarization-via-gpr-independent-suppression-of-na-ca-2-exchanger-and-endoplasmic-reticulum-ca-2-refilling
#13
Alexander I Bondarenko, Fabrizio Montecucco, Olga Panasiuk, Vadim Sagach, Nataliya Sidoryak, Karim J Brandt, François Mach
Lysophosphatidylinositol (LPI) and lysophosphatidylcholine (LPC) are lipid signaling molecules that induce endothelium-dependent vasodilation. In addition, LPC suppresses acetylcholine (Ach)-induced responses. We aimed to determine the influence of LPC and LPI on hyperpolarizing responses in vitro and in situ endothelial cells (EC) and identify the underlying mechanisms. Using patch-clamp method, we show that LPI and LPC inhibit EC hyperpolarization to histamine and suppress Na(+)/Ca(2+) exchanged (NCX) currents in a concentration-dependent manner...
January 4, 2017: Vascular Pharmacology
https://www.readbyqxmd.com/read/28063367/effects-of-high-fructose-intake-on-the-development-of-hypertension-in-the-spontaneously-hypertensive-rats-the-role-of-at1r-gp91-phox-signaling-in-the-rostral-ventrolateral-medulla
#14
Kay L H Wu, Chih-Wei Wu, You-Lin Tain, Yung-Mei Chao, Chun-Ying Hung, Pei-Chia Tsai, Wei-Sing Wang, Cheng-Dean Shih
Both genetic and dietary factors determine the development of hypertension. Whether dietary factor impacts the development of hereditary hypertension is unknown. Here, we evaluated the effect of daily high-fructose diet (HFD) on the development of hypertension in adolescent spontaneously hypertensive rats (SHR). Six-week-old SHR were randomly divided into two groups to receive HFD or normal diet (ND) for 3 weeks. The temporal profile of systolic blood pressure, alongside the sympathetic vasomotor activity, in the SHR-HFD showed significantly greater increases at 9-12 weeks of age compared with the age-matched SHR-ND group...
December 5, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28050958/non-invasive-prediction-of-blastocyst-implantation-ongoing-pregnancy-and-live-birth-by-mass-spectrometry-lipid-fingerprinting
#15
Edson Borges, Daniela P A F Braga, Amanda Souza Setti, Daniela A Montanni, Elaine Cristina Cabral, Marcos N Eberlin, Edson G Lo Turco, Assumpto Iaconelli
OBJECTIVE: To identify lipid markers of blastocyst implantation and ongoing pregnancy by day three culture medium mass spectrometry (MS) fingerprinting. METHODS: For this study, 33 culture media samples were harvested on day three, from 22 patients undergoing day five embryo transfers. All embryos achieved the blastocyst stage and were split into groups based on their implantation (Negative Implantation, n= 14 and Positive Implantation, n= 19). The positive implantation cycles resulted in successful ongoing pregnancies...
December 1, 2016: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28046380/we-fg-202-06-the-use-of-hybrid-pet-mri-for-identifying-the-presence-of-cardiac-inflammation-following-external-beam-irradiation
#16
O El-Sherif, I Xhaferllari, J Sykes, J Butler, J Battista, G Wisenberg, F Prato, S Gaede
PURPOSE: To monitor the evolution of radiation-induced cardiac inflammation in a canine model using hybrid positron emission tomography (PET/magnetic resonance imaging (MRI). METHODS: Research ethics approval was obtained for a longitudinal imaging study of 5 canines after cardiac irradiation. Animals were imaged at baseline, 3 months, 6 months, and 12 months post cardiac irradiation using a hybrid PET-MRI system (Biograph mMR, Siemens Healthcare). The imaging protocol was designed to assess changes in cardiac inflammation using (18) F-fluorodeoxyglucose ((18) F-FDG) PET tracer...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28032304/l-carnitine-reduces-susceptibility-to-bupivacaine-induced-cardiotoxicity-an-experimental-study-in-rats
#17
Gail K Wong, Carolyne Pehora, Mark W Crawford
BACKGROUND: The primary aim of this study was to evaluate the effect of acute administration of L-carnitine 100 mg·kg(-1) iv on susceptibility to bupivacaine-induced cardiotoxicity in rats. METHODS: In the first of two experiments, L-carnitine 100 mg·kg(-1) iv (n = 10) or saline iv (n = 10) was administered to anesthetized and mechanically ventilated Sprague-Dawley rats following which an infusion of bupivacaine 2.0 mg·kg(-1)·min(-1) iv was given until asystole occurred...
December 28, 2016: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28029212/a-new-model-to-estimate-insulin-resistance-via-clinical-parameters-in-adults-with-type-1-diabetes
#18
Xueying Zheng, Bin Huang, Sihui Luo, Daizhi Yang, Wei Bao, Jin Li, Bin Yao, Jianping Weng, Jinhua Yan
AIMS/HYPOTHESIS: Insulin resistance (IR) is a risk factor to assess the development of micro- and macro-vascular complications in type 1 diabetes (T1D). However, diabetes management in adults with T1D is limited by the difficulty of lacking simple and reliable method to estimate IR. The aim of this study was to develop a new model to estimate IR via clinical parameters in adults with T1D. METHODS: A total of 36 adults with adulthood onset T1D (n = 20) or childhood onset T1D (n = 16) were recruited by quota sampling...
December 28, 2016: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28017168/comparisons-of-the-effects-of-the-sevoflurane-and-propofol-on-acute-ischemia-reperfusion-and-dna-damages-in-rabbits
#19
Sema Oncul, Lale Karabiyik, Erdem Coskun, Ela Kadioglu, Ozlem Gulbahar
BACKGROUND AND OBJECTIVES: The aim of this study was to compare the effects of sevoflurane and propofol anesthesia on oxidative DNA damage that occurs in low-extremity ischemia and is caused by tourniquet application. METHODS: Fourteen New Zealand rabbits were randomly allocated into two equal groups. Group S (n=7) received sevoflurane (2.5-4 percent) inhalation and Group P (n=7) received a propofol infusion (1-2mg·kg(-1)·min(-1)), after which a pneumatic tourniquet was placed on the right lower extremity...
January 2017: Brazilian Journal of Anesthesiology
https://www.readbyqxmd.com/read/28002666/transient-supersaturation-supports-drug-absorption-from-lipid-based-formulations-for-short-periods-of-time-but-ongoing-solubilisation-is-required-for-longer-absorption-periods
#20
Matthew F Crum, Natalie L Trevaskis, Colin W Pouton, Christopher J H Porter
The current studies sought to explore the impact of drug supersaturation and precipitation during the dispersion and digestion of lipid-based formulations (LBF), on in vivo absorption using a coupled in vitro digestion - in vivo perfusion absorption model. Fenofibrate absorption was evaluated from a number of LBFs with different solubilisation and supersaturation capacities, and conditions at the absorptive membrane manipulated by changing perfusion conditions, intestine segment lengths and by the conduct of experiments in the presence or absence of suspended/precipitated drug...
December 21, 2016: Molecular Pharmaceutics
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