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Lipid infusion

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https://www.readbyqxmd.com/read/28720595/transcription-controls-growth-cell-kinetics-and-cholesterol-supply-to-sustain-acth-responses
#1
Robert I Menzies, Xin Zhao, Linda J Mullins, John J Mullins, Carolynn Cairns, Nicola Wrobel, Donald R Dunbar, Matthew A Bailey, Chris J Kenyon
Chronic ACTH exposure (eg Cushings) is associated with adrenal hypertrophy and steroidogenesis. The underlying molecular processes in mice have been analysed by microarray, histological and immunohistochemical techniques. Synacthen infused for 2weeks markedly increased adrenal mass and plasma corticosterone levels. Microarray analysis found greater than 2-fold changes in expression of 928 genes (P<0.001; 397 up, 531 down). These clustered in pathways involved in signalling, sterol/lipid metabolism, cell proliferation/hypertrophy and apoptosis...
July 18, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28713581/short-term-elevation-in-dietary-protein-intake-does-not-worsen-insulin-resistance-or-lipids-in-older-adults-with-metabolic-syndrome-a-randomized-controlled-trial
#2
Il-Young Kim, Scott E Schutzler, Gohar Azhar, Robert R Wolfe, Arny A Ferrando, Robert H Coker
BACKGROUND: There is a great deal of controversy as to whether higher protein intake improves or worsens insulin sensitivity in humans. The purpose of the study was to determine the influence of a short-term elevation in dietary protein on hepatic and peripheral insulin sensitivity in twelve older subjects (51-70 yrs) with metabolic syndrome. METHODS: Individuals were randomly assigned to one of the dietary groups: recommended protein intake (RPI, 10% of daily calorie intake) or elevated protein intake (EPI, 20% of daily calorie intake) for 4 weeks...
2017: BMC Nutrition
https://www.readbyqxmd.com/read/28709467/amitriptyline-induced-ventricular-tachycardia-a-case-report
#3
Khandker Mohammad Nurus Sabah, Abdul Wadud Chowdhury, Mohammad Shahidul Islam, Bishnu Pada Saha, Syed Rezwan Kabir, Shamima Kawser
BACKGROUND: In Bangladesh, each emergency physician faces amitriptyline overdose nearly a day. An acute cardiovascular complication, one of the worst complications is mainly responsible for the mortality in tricyclic overdose. Recently, we managed ventricular tachycardia in a young female presented with an impaired consciousness 10 h after intentionally ingesting 2500 mg amitriptyline. Here, we report it, discuss how the electrocardiography is vital to acknowledge and predict it and its' complications and also the recent update of the management of it...
July 14, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28708380/a-novel-strategy-for-quantitative-analysis-of-isomeric-bis-monoacylglycero-phosphate-and-phosphatidylglycerol-species-by-shotgun-lipidomics-after-one-step-methylation
#4
Miao Wang, Juan Pablo Palavicini, Adam Cseresznye, Xianlin Han
Understanding the cellular function and metabolism of bis(monoacylglycero)phosphate (BMP), an important but low abundance class of phospholipids, has been hindered due to its difficulties to be resolved from its structural isomer (i.e., phosphatidylglycerol, PG, another low abundance class of phospholipids). A novel strategy for quantitative analysis of BMP and PG species was developed after one-step methylation of lipid extracts in combination with high mass accuracy/resolution mass spectrometry after direct infusion (i...
July 14, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28706885/omega-3-fatty-acids-inhibit-oxidative-stress-in-a-rat-model-of-liver-regeneration
#5
Ozgur Firat, Ozer Makay, Levent Yeniay, Goksel Gokce, Cigdem Yenisey, Ahmet Coker
PURPOSE: Lipid peroxidation and consequent reactive oxygen species in the setting of oxidative stress have crucial roles in liver regeneration, which may adversely affect the regeneration itself and lead to liver failure. The aim of the current study is to investigate whether omega-3 fatty acid supplementation inhibits oxidative stress in an experimental model of liver regeneration. METHODS: Forty rats were allocated to four groups. Rats in group A received a sham operation...
July 2017: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/28705993/effects-of-%C3%AE-hydroxy-%C3%AE-methylbutyrate-hmb-on-skeletal-muscle-mitochondrial-content-and-dynamics-and-lipids-after-10-days-of-bed-rest-in-older-adults
#6
Robert A Standley, Giovanna Distefano, Suzette L Pereira, Min Tian, Owen J Kelly, Paul M Coen, Nicolaas E P Deutz, Robert R Wolfe, Bret H Goodpaster
Loss of muscle mass during periods of disuse likely has negative health consequences for older adults. We have previously shown that β-hydroxy-β-methylbutyrate (HMB) supplementation during 10 days of strict bed rest (BR) attenuates the loss of lean mass in older adults. To elucidate potential molecular mechanisms of HMB effects on muscle during bed rest and resistance training rehabilitation (RT), we examined mediators of skeletal muscle mitochondrial dynamics, autophagy and atrophy, and intramyocellular lipids...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28701300/duodenal-and-ileal-glucose-infusions-differentially-alter-gastrointestinal-peptides-appetite-response-and-food-intake-a-tube-feeding-study
#7
Sally D Poppitt, Hyun Sang Shin, Anne-Thea McGill, Stephanie C Budgett, Kim Lo, Malcolm Pahl, Janice Duxfield, Mark Lane, John R Ingram
Background: Activation of the ileal brake through the delivery of nutrients into the distal small intestine to promote satiety and suppress food intake provides a new target for weight loss. Evidence is limited, with support from naso-ileal lipid infusion studies.Objective: The objective of the study was to investigate whether glucose infused into the duodenum and ileum differentially alters appetite response, food intake, and secretion of satiety-related gastrointestinal peptides.Design: Fourteen healthy male participants were randomly assigned to a blinded 4-treatment crossover, with each treatment of single-day duration...
July 12, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28694329/feminization-of-male-mouse-liver-by-persistent-growth-hormone-stimulation-activation-of-sex-biased-transcriptional-networks-and-dynamic-changes-in-chromatin-states
#8
Dana Lau-Corona, Alexander Suvorov, David J Waxman
Sex-dependent pituitary GH secretory profiles--pulsatile in males and persistent in females--regulate sex-biased, STAT5-dependent expression of hundreds of genes in mouse liver, imparting sex differences in hepatic drug/lipid metabolism and disease risk. Here we examine transcriptional and epigenetic changes induced by continuous-GH infusion (cGH) in male mice, which rapidly feminizes the temporal profile of liver STAT5 activity. cGH repressed 86% of male-biased genes and induced 68% of female-biased genes within 4-days; however, several highly female-specific genes showed weak or no feminization, even after 14-days cGH...
July 10, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28693962/the-impact-of-triglycerides-on-glucose-tolerance-lipotoxicity-revisited
#9
REVIEW
M Seghieri, D Tricò, A Natali
Elevated plasma triglycerides (TGs) are early key features of conditions associated with a dysregulation in glucose metabolism and may predict the development of type 2 diabetes (T2D) over time. Although the acute ingestion of lipid, either mixed with or shortly before the meal, is neutral or slightly beneficial on glucose tolerance, a short-term increase in plasma TGs induced by either an i.v. lipid infusion or a high-fat diet produces a deterioration of glucose control. Accordingly, chronic lowering of plasma TGs by fibrates improves glucose homeostasis and may also prevent T2D...
July 7, 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/28693421/lipidmatch-an-automated-workflow-for-rule-based-lipid-identification-using-untargeted-high-resolution-tandem-mass-spectrometry-data
#10
Jeremy P Koelmel, Nicholas M Kroeger, Candice Z Ulmer, John A Bowden, Rainey E Patterson, Jason A Cochran, Christopher W W Beecher, Timothy J Garrett, Richard A Yost
BACKGROUND: Lipids are ubiquitous and serve numerous biological functions; thus lipids have been shown to have great potential as candidates for elucidating biomarkers and pathway perturbations associated with disease. Methods expanding coverage of the lipidome increase the likelihood of biomarker discovery and could lead to more comprehensive understanding of disease etiology. RESULTS: We introduce LipidMatch, an R-based tool for lipid identification for liquid chromatography tandem mass spectrometry workflows...
July 10, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28692411/evaluation-of-the-health-benefits-of-a-multivitamin-multimineral-herbal-essential-oil-infused-supplement-a-pilot-trial
#11
Xuesheng Han, Dennis L Eggett, Tory L Parker
This study was designed to quantitatively evaluate the health benefits of a multivitamin, multimineral, herbal, essential oil-infused supplement using serum biomarkers. We also qualitatively evaluated the health effects of this supplement using a survey. Sixteen participants were recruited to take the supplement as directed for two months. The levels of the following serum components were measured in the participants: total cholesterol, high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, triglycerides, lipoprotein(a), LDL/HDL cholesterol ratio, total/HDL cholesterol ratio, ferritin, fibrinogen, C-reactive protein, insulin, testosterone, sex hormone binding globulin, free androgen index, red blood cell magnesium, homocysteine, coenzyme Q10, lipid peroxides, alpha-tocopherol, gamma-tocopherol, cardiovascular index, eicosapentaenoic acid (EPA), arachidonic acid (AA), and the AA/EPA ratio...
July 10, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28689298/short-infusion-of-paclitaxel-imbalances-plasmatic-lipid-metabolism-and-correlates-with-cardiac-markers-of-acute-damage-in-patients-with-breast-cancer
#12
C Panis, R Binato, S Correa, V J Victorino, V Dias-Alves, A C S A Herrera, R Cecchini, A N C Simão, D S Barbosa, L Pizzatti, E Abdelhay
PURPOSE: Although paclitaxel-based chemotherapy is widely used for treating breast cancer, paclitaxel therapy has been associated with several adverse effects. Such adverse effects have primarily been associated with long-term regimens, but some acute effects are being increasingly reported in the literature. In this context, the present study analyzed the systemic proteomic profiles of women diagnosed with breast cancer at the first cycle of short paclitaxel infusion (n = 30). Proteomic profiles thus obtained were compared with those of breast cancer patients without chemotherapy (n = 50), as well as with those of healthy controls (n = 40)...
July 8, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28688059/a-case-of-severe-refractory-hypotension-after-amlodipine-overdose
#13
Melissa Chudow, Kevin Ferguson
Calcium channel blockers (CCBs) are responsible for a substantial portion of the mortality associated with cardiovascular medication overdose cases. Amlodipine, a dihydropyridine CCB, can cause prolonged hypotension in overdose. This report describes a severe amlodipine overdose case that was refractory to multiple therapeutic approaches. A 53-year-old male presented after ingesting eighty 10 mg amlodipine tablets in a suicide attempt. The patient was initially managed with calcium boluses, glucagon, multiple vasoactive agents, lipid emulsion infusions and hyperinsulinemic euglycemic therapy...
July 7, 2017: Cardiovascular Toxicology
https://www.readbyqxmd.com/read/28667118/the-gluco-and-liporegulatory-and-the-vasodilatory-effects-of-glucose-dependent-insulinotropic-polypeptide-gip-are-abolished-by-an-antagonist-of-the-human-gip-receptor
#14
Meena Asmar, Ali Asmar, Lene Simonsen, Lærke Smidt Gasbjerg, Alexander Hovard Sparre-Ulrich, Mette Rosenkilde, Bolette Hartmann, Flemming Dela, Jens Juul Holst, Jens Bülow
A truncated form of human GIP, GIP(3-30)NH2, was recently identified as an antagonist of the human GIP receptor. This study examined the ability of GIP(3-30)NH2 to antagonize the physiological actions of GIP in glucose metabolism, subcutaneous abdominal adipose tissue blood flow (ATBF) and lipid metabolism in humans.Eight lean subjects were studied by measuring arterio-venous concentrations of metabolites and ATBF on three different occasions during hyperglycemic-hyperinsulinemic clamps with concomitant infusions of either GIP, GIP(3-30)NH2 or both GIP and GIP(3-30)NH2During GIP(3-30)NH2 alone and in combination with GIP, insulin levels and the total glucose amount infused to maintain the clamp were lower than during GIP alone...
June 30, 2017: Diabetes
https://www.readbyqxmd.com/read/28666268/myeloid-specific-genetic-ablation-of-atp-binding-cassette-transporter-abca1-is-protective-against-cancer
#15
Maryam Zamanian-Daryoush, Daniel J Lindner, Joseph A DiDonato, Matthew Wagner, Jennifer Buffa, Patricia Rayman, John S Parks, Marit Westerterp, Alan R Tall, Stanley L Hazen
Increased circulating levels of apolipoprotein A-I (apoA-I), the major protein of high-density lipoprotein (HDL), by genetic manipulation or infusion, protects against melanoma growth and metastasis. Herein, we explored potential roles in melanoma tumorigenesis for host scavenger receptor class B, type 1 (SR-B1), and ATP-binding cassette transporters A1 (ABCA1) and G1 (ABCG1), all mediators of apoA-I and HDL sterol and lipid transport function. In a syngeneic murine melanoma tumor model, B16F10, mice with global deletion of SR-B1 expression exhibited increased plasma HDL cholesterol (HDLc) levels and decreased tumor volume, indicating host SR-B1 does not directly contribute to HDL-associated anti-tumor activity...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28660580/bioinformatics-pertinent-to-lipid-analysis-in-biological-samples
#16
Justin Ma, Ulises Arbelo, Yenifer Guerra, Katyayini Aribindi, Sanjoy K Bhattacharya, Daniel Pelaez
Electrospray ionization mass spectrometry has revolutionized the way lipids are studied. In this work, we present a tutorial for analyzing class-specific lipid spectra obtained from a triple quadrupole mass spectrometer. The open-source software MZmine 2.21 is used, coupled with LIPID MAPS databases. Here, we describe the steps for lipid identification, ratiometric quantification, and briefly address the differences to the analyses when using direct infusion versus tandem liquid chromatography-mass spectrometry (LC-MS)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28660568/lipid-sample-preparation-for-biomedical-research
#17
Ravin Sajnani, Katyayini Aribindi
We describe here a step-by-step protocol for extraction of lipids from tissue/cell samples for biomedical research. The protocol described here works well for biological samples that contain lipids, which are less than 2% of weight compared to total wet weight of tissue or cells. The protocols described here are suitable and incremental modification of previously published protocols. These protocols have been developed based on our experience with different tissues and cells, and yield estimates determined using class-specific mass spectrometry either using direct infusion or after chromatographic separation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28650171/comprehensive-lipoprotein-characterization-using-lipidomics-analysis-of-human-plasma
#18
Nicolas Christinat, Mojgan Masoodi
Lipoproteins are responsible for the transport of lipids and other nutrients in the circulation and therefore play an important role in lipid metabolism and dyslipidemia. They have also been linked to multiple metabolic disorders including cardiovascular disease, thus understanding their lipid composition is of crucial importance. Characterization of lipoproteins is a challenging task due to their heterogeneity. In particular, their fractionation is often laborious and time-consuming, making large sets of clinical samples difficult to analyze...
June 26, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28630872/effect-of-regular-aerobic-activity-in-young-healthy-athletes-on-profile-of-endothelial-function-and-platelet-activity
#19
Katarzyna Podgórska, Arkadiusz Derkacz, Ewa Szahidewicz-Krupska, Jakub Jasiczek, Piotr Dobrowolski, Aneta Radziwon-Balicka, Robert Skomro, Andrzej Szuba, Grzegorz Mazur, Adrian Doroszko
The aim of the study was to assess the impact of regular professional sports activity on the endothelial and platelet function in young men. The studied group were 79 young men (18-40 y, 25 athletes and 54 without any regular physical activity). The nitric oxide (NO) metabolic pathway intermediates, oxidative stress markers, mediators of inflammation, and platelet aggregation were measured. Flow mediated dilation (FMD) was studied before and after intravenous 16,0 g L-arginine infusion, which was repeated after oral administration of acetylsalicylic acid (ASA-75 mg/day) for 4 days...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28629388/the-albumin-exendin-4-recombinant-protein-e2hsa-improves-glycemic-control-and-%C3%AE-cell-function-in-spontaneous-diabetic-kkay-mice
#20
Caina Li, Shaocong Hou, Shuainan Liu, Yi Huan, Sujuan Sun, Quan Liu, Zhufang Shen
BACKGROUND: E2HSA is a genetic fusion protein that consists of two tandem exendin-4 molecules that are covalently bonded to recombinant human serum albumin via a peptide linker. Previous studies have demonstrated that E2HSA significantly decreased blood glucose levels, improved β-cell function and promoted β-cell proliferation in diabetic db/dB mice. This study aimed to evaluate the benefits of E2HSA on glucose and lipid metabolism in a spontaneous diabetes animal model, KKAy mice. METHODS: E2HSA was acutely administered at doses of 1, 3 and 9 mg/kg by subcutaneous injection in diabetic KKAy mice with exendin-4 (2 μg/kg) as a positive reference, and then the non-fasting blood glucose and food intake levels were dynamically monitored...
June 19, 2017: BMC Pharmacology & Toxicology
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