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https://www.readbyqxmd.com/read/28796777/surface-active-properties-of-lipid-nanocapsules
#1
Celia R A Mouzouvi, Anita Umerska, André K Bigot, Patrick Saulnier
Lipid nanocapsules (LNCs) are biomimetic nanocarriers used for the encapsulation of a broad variety of active ingredients. Similar to surface active compounds, LNCs contain both hydrophilic and hydrophobic parts in their structure. Moreover, the components of LNCs, macrogol 15 hydroxystearate (MHS) and lecithin, are known for their surface active properties. Therefore, the aim of this paper was to investigate the capability of the LNCs to decrease surface tension using two techniques: drop tensiometry and the Wilhelmy plate method...
2017: PloS One
https://www.readbyqxmd.com/read/28795592/semi-synthetic-thymoquinone-analogs-new-prototypes-as-potential-antihyperlipidemics-in-irradiated-rats
#2
Nashwa H Zaher, Engy R Rashed, Mona A El-Ghazaly
AIM: Thymoquinone (TQ), has been reported to possess strong antihyperlipidemic properties. However, a variety of serious side effects has been reported for TQ. The present study aimed to evaluate the potential antihyperlipidemic activity of newly synthesized TQ analogs. METHODS & RESULTS: first, novel TQ derivatives were studied against radiation-induced dyslipidemia in male rats. Second, the most promising sulfur derivatives (4-7), were further tested to elucidate their possible mechanism(s) of actions...
August 10, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/28794316/highly-viscoelastic-reverse-wormlike-micellar-systems-from-a-mixture-of-lecithin-polyglycerol-fatty-acid-monoesters-and-an-oil
#3
Kaname Hashizaki, Miko Imai, Shuhei Yako, Hitomi Tsusaka, Yuichi Sakanishi, Yoshihiro Saito, Makiko Fujii
We report new lecithin reverse wormlike micelles with high viscoelasticity formed using lecithin/polyglycerol fatty acid monoester (PGLFA)/oil systems. In this study, the influence of the amphiphilicity (i.e., hydrophile-lipophile balance, HLB) of PGLFA on the phase behavior and rheological properties of reverse wormlike micelles was investigated in detail. PGLFAs with degrees of polymerization of polyglycerol varying between 6-40 and constituent fatty acids with chains between 6-18 carbon atoms long were used...
August 8, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28794309/enteral-formula-containing-egg-yolk-lecithin-improves-diarrhea
#4
Tetsuro Akashi, Ayano Muto, Yayoi Takahashi, Hiroshi Nishiyama
Diarrhea often occurs during enteral nutrition. Recently, several reports showed that diarrhea improves by adding egg yolk lecithin, an emulsifier, in an enteral formula. Therefore, we evaluated if this combination could improve diarrhea outcomes. We retrospectively investigated the inhibitory effects on watery stools by replacing a polymeric fomula with that containing egg yolk lecithin. Then, we investigated the emulsion stability in vitro. Next, we examined the lipid absorption using different emulsifiers among bile duct-ligated rats and assessed whether egg yolk lecithin, medium-chain triglyceride, and dietary fiber can improve diarrhea outcomes in a rat model of short bowel syndrome...
August 8, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28770536/preparation-and-in-vivo-evaluation-of-lecithin-based-microparticles-for-topical-delivery-of-minoxidil
#5
Hyo-Jung Lee, Dong-Won Oh, Min-Ju Na, Dong-Wook Kim, Dong-Yeon Yuk, Hyoung-Chul Choi, Yong-Beom Lee, Kun Han, Chun-Woong Park
Minoxidil is widely used for treatment of androgenic alopecia. Commercial products containing minoxidil are usually in solution form. Repeated applications of minoxidil solution can lead to adverse effects such as skin irritation and horniness. The aims of this study were to prepare lecithin-based microparticle in minoxidil solution for enhancement of minoxidil topical delivery and skin protection and evaluate the ability of lecithin on in vitro delivery, in vivo hair growth, and skin trouble improvement compared to commercial minoxidil solution...
August 2, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28766509/high-density-lipoprotein-metabolism-and-reverse-cholesterol-transport-strategies-for-raising-hdl-cholesterol
#6
Katerina Tosheska Trajkovska, Sonja Topuzovska
A key to effective treatment of cardiovascular disease is to understand the body's complex lipoprotein transport system. Reverse cholesterol transport (RCT) is the process of cholesterol movement from the extrahepatic tissues back to the liver. Lipoproteins containing apoA-I [highdensity lipoprotein (HDL)] are key mediators in RCT, whereas non-high-density lipoproteins (non-HDL, lipoproteins containing apoB) are involved in the lipid delivery pathway. HDL particles are heterogeneous; they differ in proportion of proteins and lipids, size, shape, and charge...
August 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28765708/folate-modified-annonaceous-acetogenins-nanosuspensions-and-their-improved-antitumor-efficacy
#7
Jingyi Hong, Zhonghao Sun, Yijing Li, Yifei Guo, Yonghong Liao, Meifeng Liu, Xiangtao Wang
Annonaceous acetogenins (ACGs) are a large family of fatty acid derived natural products that are exclusively isolated from the Annonaceae species. Many members of this diverse family have a broad spectrum of biological activities, the most impressive of which is anticancer activity. However, their poor solubility and severe toxicity restrict their clinical application, and their complicated composition hinders their formulation and drug delivery. In this study, β-cyclodextrin was modified with folic acid (FA) and then combined with soybean lecithin to prepare FA-modified ACGs nanosuspensions (FA-ACGs-NSps)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28763965/structural-characterization-formation-mechanism-and-stability-of-curcumin-in-zein-lecithin-composite-nanoparticles-fabricated-by-antisolvent-co-precipitation
#8
Lei Dai, Cuixia Sun, Ruirui Li, Like Mao, Fuguo Liu, Yanxiang Gao
Curcumin (Cur) exhibits a range of bioactive properties, but its application is restrained due to its poor water solubility and sensitivity to environmental stresses. In this study, zein-lecithin composite nanoparticles were fabricated by antisolvent co-precipitation technique for delivery of Cur. The result showed that the encapsulation efficiency of Cur was significantly enhanced from 42.03% in zein nanoparticles to 99.83% in zein-lecithin composite nanoparticles. The Cur entrapped in the nanoparticles was in an amorphous state confirmed by differential scanning calorimetry and X-ray diffraction...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28763372/xinxuekang-regulates-reverse-cholesterol-transport-by-improving-high-density-lipoprotein-synthesis-maturation-and-catabolism
#9
Guang-Xin Dong, Wen-Wen Li, Ruo-Zhu Wang, Wen-Jun Zou, Zhen-Dong Zhong, Bo-Gang Li
Di'ao Xinxuekang (XXK) is an herbal product in China and the Netherlands that has been clinically shown to attenuate atherosclerosis; however, the underlying antiatherosclerotic mechanism remains unclear. Because of its role in cholesterol homeostasis, reverse cholesterol transport (RCT) is a potential target for these beneficial effects. This study investigated the effects of XXK on RCT and related proteins. After treating ApoE-deficient mice with XXK for 8 weeks, we observed an increase in the expression level of ATP-binding cassette transporter A1 and ATP-binding cassette transporter G1, which in turn stimulated cholesterol efflux and reduced aortic atherosclerotic lesion area...
August 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28758396/impact-of-lca-associated-e14l-lrat-mutation-on-protein-stability-and-retinoid-homeostasis
#10
Sylwia Chelstowska, Made Airanthi K Widjaja-Adhi, Josie A Silvaroli, Marcin Golczak
Vitamin A (all-trans-retinol) is metabolized to the visual chromophore (11-cis-retinal) in the eyes and to all-trans-retinoic acid, a hormone like compound, in most tissues. A key enzyme in retinoid metabolism is lecithin:retinol acyltransferase (LRAT), which catalyzes the esterification of vitamin A. The importance of LRAT is indicated by pathogenic missense and nonsense mutations, which cause devastating blinding diseases. Retinoid-based chromophore replacement therapy has been proposed as treatment for these types of blindness based on studies in LRAT null mice...
August 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/28751001/effect-of-tofacitinib-on-lipid-levels-and-lipid-related-parameters-in-patients-with-moderate-to-severe-psoriasis
#11
Robert Wolk, Ehrin J Armstrong, Peter R Hansen, Bruce Thiers, Shuping Lan, Anna M Tallman, Mandeep Kaur, Svitlana Tatulych
BACKGROUND: Psoriasis is a systemic inflammatory disease associated with increased cardiovascular (CV) risk and altered lipid metabolism. Tofacitinib is an oral Janus kinase inhibitor. OBJECTIVE: The aim of the study was to investigate the effects of tofacitinib on traditional and nontraditional lipid parameters and CV risk markers in patients with psoriasis from a phase III study, OPT Pivotal 1. METHODS: Patients with psoriasis were randomized to tofacitinib 5 or 10 mg twice daily (BID) or placebo BID...
June 24, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28749696/the-influence-of-physiological-gastrointestinal-surfactant-ratio-on-the-equilibrium-solubility-of-bcs-class-ii-drugs-investigated-using-a-four-component-mixture-design
#12
Zhou Zhou, Claire Dunn, Ibrahim Khadra, Clive G Wilson, Gavin W Halbert
The absorption of poorly water-soluble drugs is influenced by the luminal gastrointestinal fluid content and composition which controls solubility. Simulated intestinal fluids have been introduced into dissolution testing including endogenous amphiphiles and digested lipids at physiological levels; however, in vivo individual variation exists in the concentrations of these components, which will alter drug absorption through an effect on solubility. The use of a factorial design of experiment and varying media by introducing different levels of bile, lecithin and digested lipids has been previously reported, but here we investigate the solubility variation of poorly-soluble drugs through more complex biorelevant amphiphile interactions...
July 27, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28744120/inhibitory-effect-of-a-new-orally-active-cedrol-loaded-nanostructured-lipid-carrier-on-compound-48-80-induced-mast-cell-degranulation-and-anaphylactic-shock-in-mice
#13
Shreyasi Chakraborty, Nabanita Kar, Leena Kumari, Asit De, Tanmoy Bera
BACKGROUND: Type I hypersensitivity is an allergic reaction characterized by the overactivity of the immune system provoked by normally harmless substances. Glucocorticoids, anti-histamines, or mast cell stabilizers are the choices of treatment for type I hypersensitivity. Even though these drugs have the anti-allergic effect, they can have several side effects in prolong use. Cedrol is the main bioactive compound of Cedrus atlantica with anti-tumor, anti-oxidative, and platelet-activating factor inhibiting properties...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28741693/antioxidants-protect-proteins-anchorage-to-the-bilayer-by-improving-plasma-membrane-integrity-of-ram-spermatozoa-during-liquid-preservation-in-a-soya-lecithin-based-diluent
#14
R K Paul, D Kumar, Smk Naqvi
Antioxidants are known to prevent the reactive oxygen species (ROS)-mediated peroxidative damage to the membrane lipids during hypothermic storage of mammalian spermatozoa. We hypothesized here that ROS also affect the lipid-protein interactions, thereby diminishing the membrane's integrity and proteins' anchorage to the bilayer. Antioxidants prevent these damages by scavenging the ROS. Ejaculates from Patanwadi rams were pooled after subjective evaluation and centrifuged using Percoll(®) . Sperm pellet was resuspended in soya lecithin-Tris-fructose diluent (400 × 10(6)  cells/ml) containing either antioxidants (100 IU/ml catalase + 10 mM reduced glutathione) or no antioxidant...
July 25, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28737387/self-assembly-of-lecithin-and-bile-salt-in-the-presence-of-inorganic-salt-in-water-mesoscale-computer-simulation
#15
Anastasia A Markina, Viktor A Ivanov, Pavel V Komarov, Alexei R Khokhlov, Shih-Huang Tung
The influence of inorganic salt on the structure of lecithin/bile salt mixtures in aqueous solution is studied by means of dissipative particle dynamics simulations. We propose a coarse-grained model of phosphatidylcholine and two types of bile salts (sodium cholate and sodium deoxycholate), and also take into account the presence of low molecular weight salt. This model allows us to study the system on rather large time and length scales (up to about ~20 µs and 50 nm) and to reveal mechanisms of experimentally observed increasing of viscosity upon increasing the low molecular weight salt concentration in this system...
July 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28717321/effect-of-different-concentrations-of-soybean-lecithin-and-virgin-coconut-oil-in-tris-based-extender-on-the-quality-of-chilled-and-frozen-thawed-bull-semen
#16
A A Tarig, H Wahid, Y Rosnina, N Yimer, Y M Goh, F H Baiee, A M Khumran, H Salman, M A Assi, M Ebrahimi
AIM: The objective of this study was to evaluate the effects of different concentrations of soybean lecithin (SL) and virgin coconut oil (VCO) in Tris-based extender on chilled and frozen-thawed bull semen quality parameters. MATERIALS AND METHODS: A total of 24 ejaculates were collected from four bulls via an electroejaculator. Semen samples were diluted with 2% VCO in Tris-based extender which consists of various concentrations of SL (1, 1.25, 1.5, and 1.75%)...
June 2017: Veterinary World
https://www.readbyqxmd.com/read/28717055/incidence-of-anaphylactic-reactions-after-propofol-administration-in-dogs
#17
Mamoru Onuma, Misao Terada, Sadaharu Ono, Akiyoshi Murakami, Tomoko Ishida, Tadashi Sano
Propofol is an anesthetic agent suspended in an emulsion system that includes egg yolk lecithin and soybean oil, because of which, there is concern about the use of propofol in patients allergic to these substances. We examined the association between propofol administration and incidence of adverse events in dogs with allergy to egg yolk lecithin and soybean oil. On the basis of the findings of an allergen-specific immunoglobulin E (IgE) test, 14 dogs with high levels (high-IgE group) and 7 dogs with low levels (normal-IgE group) of IgE were selected...
July 14, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28716598/effect-of-lecithin-nanoliposome-or-soybean-lecithin-supplemented-by-pomegranate-extract-on-post-thaw-flow-cytometric-microscopic-and-oxidative-parameters-in-ram-semen
#18
Mahdieh Mehdipour, Hossein Daghigh Kia, Maryam Nazari, Abouzar Najafi
This investigation was carried out to study the effect of soybean lecithin 1.5% (wt/vol) (0, 2.5, 5 and 7.5 mg l(-1) pomegranate extract (PE)) or PE-loaded lecithin nanoliposome (0, 2.5, 5 and 7.5 mg l(-1)) to Tris-based extender. Sperm motility (CASA), viability, membrane integrity (HOS test), abnormalities, mitochondrial activity, apoptosis status, lipid peroxidation, total antioxidant capacity (TAC)) and antioxidant activities (GPX, SOD) were investigated following freeze-thawing. No significant differences (P < 0...
July 14, 2017: Cryobiology
https://www.readbyqxmd.com/read/28714250/development-of-antimicrobial-nanoemulsion-based-delivery-systems-against-selected-pathogenic-bacteria-using-a-thymol-rich-thymus-daenensis-essential-oil
#19
Lida Ghaderi, Roya Moghimi, Atousa Aliahmadi, David Julian McClements, Hasan Rafati
AIMS: Thymol rich medicinal plants have been used in traditional medicine to relieve infectious diseases. However, the application of essential oils as medicine is limited by its low water-solubility and high vapor pressure. The objective of this study was to produce stable nanoemulsions of Thymus daenensis oil in water by preventing Ostwald ripening and phase separation. METHODS & RESULTS: The antibacterial activity of bulk and emulsified essential oil against selected pathogenic bacteria including Gram-negative (Haemophilus influenzae, Pseudomonas aeruginosa) and Gram-positive (Streptococcus pneumoniae) were investigated in the liquid and vapor phase...
July 17, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28711641/tacrolimus-loaded-biocompatible-lecithin-based-microemulsions-with-improved-skin-penetration-structure-characterization-and-in-vitro-in-vivo-performances
#20
Vedrana Savić, Marija Todosijević, Tanja Ilić, Milica Lukić, Evgenia Mitsou, Vassiliki Papadimitriou, Spyridon Avramiotis, Bojan Marković, Nebojša Cekić, Snežana Savić
In order to improve skin penetration of tacrolimus we aimed to develop potentially non-irritant, lecithin-based microemulsions containing ethanol, isopropanol and/or propylene glycol as cosurfactants, varying caprylic/capric triglycerides and propylene glycol monocaprylate as oil phase. The influence of excipients on the size of microemulsion region in pseudo-ternary phase diagrams and their ability to form different types of microemulsions was evaluated. The comprehensive physicochemical characterization of microemulsions and the evaluation of their structure was performed, while the localization of tacrolimus in microemulsions was further investigated using electron paramagnetic resonance spectroscopy...
July 12, 2017: International Journal of Pharmaceutics
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