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Lipid emulsion

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https://www.readbyqxmd.com/read/29220188/instability-mechanisms-of-water-in-oil-nanoemulsions-with-phospholipids-temporal-and-morphological-structures
#1
Jan-Hendrik Sommerling, Maria Betania Carreira de Matos, Ellen Hildebrandt, Alberto Dessy, Robbert J Kok, Hermann Nirschl, Gero Leneweit
Many food preparations, pharmaceuticals, and cosmetics use water in oil (W/O) emulsions stabilized by phospholipids. Moreover, recent technological developments try to produce liposomes or lipid coated capsules from W/O emulsions, but are faced with colloidal instabilities. To explore these instability mechanisms, emulsification by sonication was applied in three cycles and the sample stability was studied for 3 hours after each cycle. Clearly identifiable temporal structures of instability provide evidence about the emulsion morphology: an initial regime of about 10 minutes is shown to be governed by coalescence after which Ostwald ripening dominates...
December 8, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29217176/a-strong-adjuvant-based-on-glycol-chitosan-coated-lipid-polymer-hybrid-nanoparticles-potentiates-mucosal-immune-responses-against-the-recombinant-chlamydia-trachomatis-fusion-antigen-cth522
#2
Fabrice Rose, Jeanette Erbo Wern, Francesca Gavins, Peter Andersen, Frank Follmann, Camilla Foged
Induction of mucosal immunity with vaccines is attractive for the immunological protection against pathogen entrance directly at the site of infection. An example is infection with Chlamydia trachomatis (Ct), which is the most common sexually transmitted infection in the world, and there is an unmet medical need for an effective vaccine. A vaccine against Ct should elicit protective humoral and cell-mediated immune (CMI) responses in the genital tract mucosa. We previously designed an antibody- and CMI-inducing adjuvant based on poly(dl-lactic-co-glycolic acid) (PLGA) nanoparticles modified with the cationic surfactant dimethyldioctadecylammonium bromide and the immunopotentiator trehalose-6,6'-dibehenate...
December 4, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29206479/microencapsulation-of-esterified-krill-oil-using-complex-coacervation
#3
Selim Kermasha, Sarya Aziz, Jagpreet Gill, Ronald Neufeld
The microencapsulation of the esterified krill oil (EKO), obtained from the transesterification of krill oil (KO) with 3,4-dihydroxyphenylacetic acid (DHPA), via complex coacervation, was investigated. The experimental findings showed that the DHPA and phenolic lipids (PLs) in the EKO affected the stability of the gelatin (GE)-EKO emulsion. To improve its stability, the effects of varying the pH of GE and the use of two emulsification devices, including the homogenizer and ultrasonic liquid processor were investigated, where the ultrasonic liquid processor was found to be a relatively more appropriate emulsification device...
December 5, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/29203343/wide-variation-in-organisation-and-clinical-practice-of-paediatric-intestinal-failure-teams-an-international-survey
#4
Esther Neelis, Barbara de Koning, Myriam van Winckel, Merit Tabbers, Susan Hill, Jessie Hulst
BACKGROUND & AIMS: We aimed to assess the current organisation and clinical practice of teams treating children with intestinal failure (IF) across Europe and compare the results with the current guideline. METHODS: A two-part online survey was sent to all the major European specialist IF services. The first part concerned general information about the team and patients monitored. The second part concerned important care topics such as vascular access and monitoring of complications...
November 22, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29198120/in-situ-interfacial-conjugation-of-chitosan-with-cinnamaldehyde-during-homogenization-improves-the-formation-and-stability-of-chitosan-stabilized-emulsions
#5
Huanle Chen, David Julian McClements, Enmin Chen, Shilin Liu, Bin Li, Yan Li
The emulsifying properties of a natural cationic polysaccharide (chitosan) were improved by in situ conjugation with a natural essential oil (cinnamaldehyde, CA) during homogenization. In the absence of CA, chitosan-coated medium chain triglyceride (MCT) droplets were highly susceptible to creaming and coalescence at pH values ranging from 1 to 6.5. However, incorporation of relatively low levels of CA in the oil phase greatly improved the formation and stability of the oil-in-water emulsions. These effects were attributed to two main factors: (i) covalent binding of lipophilic CA moieties to hydrophilic chitosan chains leading to conjugates with good surface-activity; (ii) interfacial cross-linking of adsorbed chitosan layers by CA leading to the formation of a rigid polymeric coating around the lipid droplets that improved their stability against coalescence...
December 4, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29196009/stability-of-curcumin-encapsulated-in-solid-lipid-microparticles-incorporated-in-cold-set-emulsion-filled-gels-of-soy-protein-isolate-and-xanthan-gum
#6
Thais C Brito-Oliveira, Marina Bispo, Izabel C F Moraes, Osvaldo H Campanella, Samantha C Pinho
The objective of this study was to investigate the feasibility of producing cold-set emulsion filled gels (EFG), using soy protein isolate (SPI) and xanthan gum (XG) and incorporating curcumin-loaded solid lipid microparticles (SLM). For this purpose, the formulation GXG (15%, w/v SPI, 0.1%, w/v XG and 5mM CaCl2) was selected for the production of EFG. A comparative study on the rheological and microstructural properties of non-filled gels and EFG revealed that SLM stabilized with Tween 80-Span 80 behaved as active fillers in the gel matrix, increasing the Young's modulus from 1...
December 2017: Food Research International
https://www.readbyqxmd.com/read/29188234/radiolabeled-cholesteryl-ethers-a-need-to-analyze-for-biological-stability-before-use
#7
Denny Joseph Manual Kollareth, Chuchun L Chang, Inge H Hansen, Richard J Deckelbaum
Radiolabeled cholesteryl ethers are widely used as non-metabolizable tracers for lipoproteins and lipid emulsions in a variety of in vitro and in vivo experiments. Since cholesteryl ethers do not leave cells after uptake and are not hydrolyzed by mammalian cellular enzymes, these compounds can act as markers for cumulative cell uptakes of labeled particles. We have employed [3H]cholesteryl oleoyl ether to study the uptake and distribution of triglyceride-rich emulsion particles on animal models. However, questionable unexpected results compelled us to analyze the stability of these ethers...
March 2018: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/29187121/lipid-injectable-emulsions-infusion-confusion
#8
Phil Ayers, Joseph I Boullata, Peggi Guenter, Beverly Holcombe
The commentary addresses discussion regarding the duration of infusion for lipid injectable emulsions (ILEs; previously known as intravenous fat emulsion) when administered separately from amino acids and dextrose (2:1) admixtures. The article by Mundi et al describes the administration time of ILEs administered separately as up to 24 hours, while previous American Society for Parenteral and Enteral Nutrition documents have outlined the infusion time not to exceed 12 hours.
February 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29182682/inferior-immunogenicity-and-efficacy-of-respiratory-syncytial-virus-fusion-protein-based-subunit-vaccine-candidates-in-aged-versus-young-mice
#9
Corinne Cayatte, Angie Snell Bennett, Gaurav Manohar Rajani, Leigh Hostetler, Sean K Maynard, Michelle Lazzaro, Patrick McTamney, Kuishu Ren, Terrence O'Day, Michael P McCarthy, Kirsten Schneider-Ohrum
Respiratory syncytial virus (RSV) is recognized as an important cause of lower and upper respiratory tract infections in older adults, and a successful vaccine would substantially lower morbidity and mortality in this age group. Recently, two vaccine candidates based on soluble purified glycoprotein F (RSV F), either alone or adjuvanted with glucopyranosyl lipid A formulated in a stable emulsion (GLA-SE), failed to reach their primary endpoints in clinical efficacy studies, despite demonstrating the desired immunogenicity profile and efficacy in young rodent models...
2017: PloS One
https://www.readbyqxmd.com/read/29175798/report-potential-of-nano-emulsions-as-phytochemical-delivery-system-for-food-preservation
#10
Zaffar Mahmood, Muhammad Jahangir, Muhammad Liaquat, Syed Wasim Ahmad Shah, Muhammad Mumtaz Khan, Roger Stanley, Bruce D'Arcy
Nature is a rich source of bioactive phytochemicals. These plant based compounds have rich scope as antioxidants, antimicrobial compounds and food preservatives and so for long time to be used in meat, fruits, vegetables and processed food items, either as added preservative or as coating material in various food applications, but the major limitation is their limited solubility in a food grade medium. Nano-emulsion is a best choice as a medium having vast area of application. The major advantage of nano-emulsion would be the solubility of a vast group of compounds, due to the presence of water and lipid phases...
November 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29170486/effects-of-lipid-emulsion-particle-size-on-satiety-and-energy-intake-a-randomised-cross-over-trial
#11
Sally D Poppitt, Stephanie C Budgett, Alastair K MacGibbon, Siew-Young Quek, Sophie Kindleysides, Katy R Wiessing
BACKGROUND/OBJECTIVES: Emulsified lipids, with central lipid core surrounded by polar lipid 'protective coat', have been proposed to stimulate the ileal brake, alter appetite, food intake and aid weight control. In addition to lipid composition, emulsion particle size may contribute to efficacy with small droplets providing a larger surface area for gastrointestinal (GI) lipase action and larger droplets prolonging and delaying digestion in the GI tract. Tube feeding studies delivering emulsions directly into the small intestine show clear effects of smaller particle size on appetite and food intake, but evidence from oral feeding studies is sparse...
November 24, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29165817/development-of-mayonnaise-with-substitution-of-oil-or-egg-yolk-by-the-addition-of-chia-salvia-hisp%C3%A3-nica-l-mucilage
#12
Sibele Santos Fernandes, Myriam de Las Mercedes Salas Mellado
Chia mucilage is formed by the hydration of chia seeds and presents characteristics that potentiate its application as substitute of fat in several foods. In this study, mayonnaises were prepared with different levels of freeze-dried chia mucilage instead of oil or egg yolk. The substitution of oil in mayonnaise promoted increased stability and texture parameters, and the mayonnaise substituted by egg yolk presented similar stability and texture parameters as the control mayonnaise. The substitution of oil in mayonnaise was about 50% with 45% oil substitution, whereas for the mayonnaise with 35% of egg yolk replacement it was about 0...
November 22, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29161210/index-use-of-smoflipid-in-a-tertiary-intestinal-rehabilitation-and-transplantation-program
#13
Kwai Lam, Thomas Schiano, Maria Isabel Fiel, Kishore Iyer
Long-term parenteral nutrition (PN) may be complicated by PN-associated liver disease (PNALD), and some studies suggest an association between the use of soy-based fat emulsions and PNALD development. Patients' liver function typically improves and PNALD resolves after reducing or stopping a soy-based fat emulsion, and thus lipid minimization has been the primary strategy for managing PNALD in many intestinal rehabilitation programs. However, fat emulsions often cannot be stopped entirely, leading some patients to develop PNALD even after lipid reduction strategies have been implemented...
November 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29161207/composite-intravenous-fat-emulsion-in-a-postsurgical-critically-ill-patient-a-case-study
#14
Gregory J Roberti, Cameron G Cangelose, Robert G Martindale
Parenteral nutrition (PN), including lipids, in high-risk or poorly nourished critically ill patients is indicated when enteral nutrition is contraindicated; however, soybean oil-based PN can stimulate proinflammatory processes. Fish oil (FO) is generally less inflammatory and has recently been shown to be active in the resolution of inflammatory processes. In this study, we look at whether the use of a blended intravenous fat emulsion that includes soybean, medium-chain triglycerides, olive oil, and FO confers clinical benefits in critically ill patients...
November 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29160733/potential-impact-of-inorganic-nanoparticles-on-macronutrient-digestion-titanium-dioxide-nanoparticles-slightly-reduce-lipid-digestion-under-simulated-gastrointestinal-conditions
#15
Qian Li, Ti Li, Chengmei Liu, Glen DeLoid, Georgios Pyrgiotakis, Philip Demokritou, Ruojie Zhang, Hang Xiao, David Julian McClements
Titanium dioxide (TiO2) particles are used in some food products to alter their optical properties, such as whiteness or brightness. These additives typically contain a population of TiO2 nanoparticles (d < 100 nm), which has led to concern about their potential toxicity. The objective of this study was to examine the impact of TiO2 particles on the gastrointestinal fate of oil-in-water emulsions using a simulated gastrointestinal tract (GIT) that includes mouth, stomach, and small intestine phases...
November 21, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/29158673/novel-cationic-lipid-nanoparticles-as-an-ophthalmic-delivery-system-for-multicomponent-drugs-development-characterization-in-vitro-permeation-in-vivo-pharmacokinetic-and-molecular-dynamics-studies
#16
Jialu Wang, Fang Zhao, Rui Liu, Jingjing Chen, Qinghua Zhang, Ruijuan Lao, Ze Wang, Xin Jin, Changxiao Liu
The purpose of this study was to prepare, optimize, and characterize a cationic lipid nanoparticle (CLN) system containing multicomponent drugs using a molecular dynamics model as a novel method of evaluating formulations. Puerarin (PUE) and scutellarin (SCU) were used as model drugs. CLNs were successfully prepared using melt-emulsion ultrasonication and low temperature-solidification technique. The properties of CLNs such as morphology, particle size, zeta potential, entrapment efficiency (EE), drug loading (DL), and drug release behavior were investigated...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29148930/use-of-mixed-oil-fat-emulsion-to-improve-intestinal-failure-associated-liver-disease-in-long-term-home-parenteral-nutrition-a-case-report
#17
Ryan T Hurt, Manpreet S Mundi
Home parenteral nutrition (HPN) is a life-saving therapy for patients who are not able to use their gastrointestinal tract. There are a number of complications associated with HPN, including metabolic bone disease, intestinal failure-associated liver disease (IFALD), and catheter-related bloodstream infections. We present a case of a 32-year-old HPN patient who initially developed biopsy-proven IFALD (total bilirubin, 2.4 mg/dL) while on long-term HPN. His HPN was initiated due to myopathic intestinal dysmotility and pseudo-obstruction when he was 15 years old...
November 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29148781/compound-stability-in-nano-particles-the-effect-of-solid-phase-fraction-on-diffusion-of-degradation-agents-into-nanostructured-lipid-carriers
#18
Daniel D Nelson, Yuanjie Pan, Rohan V Tikekar, Nily R Dan, N Nitin
The stability of active compounds encapsulated in nanoparticles depends on the resistance of the particles to diffusion of environmental degradation agents. In this paper, off-lattice Monte Carlo simulations are used to investigate a suspension of nanostructured lipid carriers (NLC) composed of interspaced liquid and solid lipid domains, immersed in a solution containing molecules representing oxidative or other degradation agents. The simulations examine the diffusion of the degradation agents into the nanoparticles as a function of nanoparticle size, solid domain fraction, and domain size...
November 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29146333/comparative-time-course-of-lipid-and-myofibrillar-protein-oxidation-in-different-biphasic-systems-under-hydroxyl-radical-stress
#19
Jiayi Yang, Youling L Xiong
This study aimed to investigate the relative reaction rate of protein and lipid oxidation in different biphasic model systems (linoleic acid; liposome; emulsion) containing myofibrillar protein (MFP at 1, 8 and 20 mg/mL) under hydroxyl radical stress. Protein oxidation markers exhibited significant changes in 2 h: reduced tryptophan fluorescence intensity, carbonyl formation, and extensive polymerization of myosin. In contrast, no detectable changes (P > .05) in lipid peroxide occurred within 2 h except for samples with 1 mg/mL MFP which showed an early TBARS formation...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29145932/lipid-emulsion-more-than-reversing-bupivacaine-cardiotoxicity-potential-organ-protection
#20
Negar Motayagheni, Sheshanna Phan, Ala Nozari, Anthony Atala
Efforts to develop a treatment for bupivacaine cardiotoxicity led to the discovery that Intralipid, a popular brand of intravenous lipid emulsion, could be used not only as an effective treatment for anesthetic-induced cardiac arrest, but also as a means of reversing many other toxicities. Contradictory data exist regarding the mechanism of action of lipid emulsion, a combination of fatty acids traditionally used in parenteral nutrition. Some researchers attribute the effects to lipophilicity and the individual characteristics of the lipids, while other data demonstrate a direct empowering mechanism through cellular upstream and downstream pathways...
2017: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
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