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lauric acid

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https://www.readbyqxmd.com/read/28074058/intracellular-atp-in-balance-of-pro-and-anti-inflammatory-cytokines-in-adipose-tissue-with-and-without-tissue-expansion
#1
J H Lee, Y Zhang, Z Zhao, X Ye, X Zhang, H Wang, J Ye
OBJECTIVES: To understand the mechanism of white fat expansion in the presence of inflammation, we examined the balance of pro- and anti-inflammatory cytokines in epididymal fat during weight gain in DIO mice. METHODS: The pro- and anti-inflammatory cytokines were examined in white fat of diet-induced obese mice and lean mice. The mechanism of gene expression was investigated with a focus on intracellular ATP (iATP). ATP activity was tested in cellular and non-cellular systems in activation of serine kinases (IKKβ, JNK and ERK)...
January 11, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28054477/acute-treatment-with-lauric-acid-reduces-blood-pressure-and-oxidative-stress-in-spontaneously-hypertensive-rats
#2
Naiane Ferraz Bandeira Alves, Thyago Moreira de Queiroz, Rafael de Almeida Travassos, Marciane Magnani, Valdir de Andrade Braga
The effects of acute administration of lauric acid (LA), the most abundant medium-chain fatty acid of coconut oil, on blood pressure, heart rate and oxidative stress were investigated in spontaneously hypertensive rats (SHR). Intravenous doses of LA reduced blood pressure in a dose-dependent fashion (1, 3, 4, 8 and 10 mg/kg) in both SHR and Wistar Kyoto rats. LA (10(-8) to 3 × 10(-3) M) induced vasorelaxation in isolated superior mesenteric artery rings of SHR in the presence (n = 7) or absence (n = 8) of functional endothelium [maximum effect (ME) = 104 ± 3 versus 103 ± 4%]...
November 7, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28000465/difference-in-fatty-acids-composition-of-breast-adipose-tissue-in-women-with-breast-cancer-and-benign-breast-disease
#3
Lisiane Lopes da Conceição, Mariana De Moura Dias, Milene Cristine Pessoa, Geórgia Das Graças Pena, Maria Carolina Santos Mendes, Cristiane Vilas Boas Neves, Helen Hermana Miranda Hermsdorff, Renata Nascimento Freitas, Maria do Carmo Gouveia Peluzio
INTRODUCTION: Breast cancer is the second most common cancer in the world, and the most frequent cancer among women. Moreover, there are factors that influence the risk for breast cancer including the age, genetic and endocrine factors, and lifestyle. OBJECTIVES: To evaluate the consumption of fatty acids; compare the fatty acids composition in the breast adipose tissue of women with breast cancer and benign breast disease as well as potential risk factors; and describe the genotypic frequency of the Pro12Ala PPARγ polymorphism...
November 29, 2016: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/27979115/green-synthesis-of-%C3%AE-sitostanol-esters-catalyzed-by-the-versatile-lipase-sterol-esterase-from-ophiostoma-piceae
#4
María Molina-Gutiérrez, Neumara L S Hakalin, Leonor Rodríguez-Sanchez, Alicia Prieto, María Jesús Martínez
β-sitostanol esters, used as dietary complement for decreasing cholesterol absorption, have been synthesized at 28°C via direct esterification or transesterification catalyzed by the versatile lipase/sterol esterase from the ascomycete fungus O. piceae. Direct esterification was conducted in biphasic isooctane: water systems containing 10mM β-sitostanol and lauric or oleic acid as acyl donors, reaching 90% esterification in 3h with the recombinant enzyme. The use of molar excesses of the free fatty acids did not improve direct esterification rate, and the enzyme did not convert one of the two fatty acids preferentially when both were simultaneously available...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27978622/lauric-acid-stimulates-mammary-gland-development-of-pubertal-mice-through-activation-of-gpr84-and-pi3k-akt-signaling-pathway
#5
Yingying Meng, Jing Zhang, Fenglin Zhang, Wei Ai, Xiaotong Zhu, Gang Shu, Lina Wang, Ping Gao, Qianyun Xi, Yongliang Zhang, Xingwei Liang, Qingyan Jiang, Songbo Wang
It has been demonstrated that dietary fat affects pubertal mammary gland development. However, the role of lauric acid (LA) in this process remains unclear. Thus, this study aimed to investigate the effects of LA on mammary gland development in pubertal mice and to explore the underlying mechanism. In vitro, 100 μM LA significantly promoted proliferation of mouse mammary epithelial cell line HC11 by regulating expression of proliferative markers (cyclin D1/3, p21, PCNA). Meanwhile, LA activated the G protein-coupled receptor 84 (GPR84) and PI3K/Akt signaling pathway...
December 22, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27941697/crystal-structure-of-a-putative-cytochrome-p450-alkane-hydroxylase-cyp153d17-from-sphingomonas-sp-pamc-26605-and-its-conformational-substrate-binding
#6
Chang Woo Lee, Sang-Cheol Yu, Joo-Ho Lee, Sun-Ha Park, Hyun Park, Tae-Jin Oh, Jun Hyuck Lee
Enzymatic alkane hydroxylation reactions are useful for producing pharmaceutical and agricultural chemical intermediates from hydrocarbons. Several cytochrome P450 enzymes catalyze the regio- and stereo-specific hydroxylation of alkanes. We evaluated the substrate binding of a putative CYP alkane hydroxylase (CYP153D17) from the bacterium Sphingomonas sp. PAMC 26605. Substrate affinities to C10-C12 n-alkanes and C10-C14 fatty acids with Kd values varied from 0.42 to 0.59 μM. A longer alkane (C12) bound more strongly than a shorter alkane (C10), while shorter fatty acids (C10, capric acid; C12, lauric acid) bound more strongly than a longer fatty acid (C14, myristic acid)...
December 9, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27900443/p450bm3-fused-to-phosphite-dehydrogenase-allows-phosphite-driven-selective-oxidations
#7
Nina Beyer, Justyna K Kulig, Anette Bartsch, Martin A Hayes, Dick B Janssen, Marco W Fraaije
To facilitate the wider application of the NADPH-dependent P450BM3, we fused the monooxygenase with a phosphite dehydrogenase (PTDH). The resulting monooxygenase-dehydrogenase fusion enzyme acts as a self-sufficient bifunctional catalyst, accepting phosphite as a cheap electron donor for the regeneration of NADPH.The well-expressed fusion enzyme was purified and analyzed in comparison to the parent enzymes. Using lauric acid as substrate for P450BM3, it was found that the fusion enzyme had similar substrate affinity and hydroxylation selectivity while it displayed a significantly higher activity than the non-fused monooxygenase...
November 29, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27894987/a-novel-approach-for-dry-powder-coating-of-pellets-with-ethylcellulose-part-i-evaluation-of-film-formulation-and-process-set-up
#8
Beatrice Albertini, Serena Bertoni, Cecilia Melegari, Luisa Stella Dolci, Nadia Passerini
An innovative dry powder coating technology was developed in a high-shear granulator using ethylcellulose (E10) as polymer. Several solid plasticizers were investigated with the aim of decreasing the polymer Tg at least to the highest possible working temperature (80°C). DSC analysis of physical mixtures of E10 and plasticizers evidenced that lauric acid (LA) was the most effective plasticizer. In order to reach the target temperature a liquid plasticizer, oleic acid (OA), was introduced in the coating formulation...
January 10, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27890614/structural-insights-into-the-binding-of-lauric-acid-to-cyp107l2-from-streptomyces-avermitilis
#9
Songhee Han, Tan-Viet Pham, Joo-Hwan Kim, Young-Ran Lim, Hyoung-Goo Park, Dabin Jeong, Chul-Ho Yun, Young-Jin Chun, Lin-Woo Kang, Donghak Kim
Streptomyces avermitilis is an actinobacterium known to produce clinically useful macrolides including avermectins. CYP107L2 from S. avermitilis shares a high sequence similarity with the PikC (CYP107L1) from S. venezuelae. To elucidate the structural features of CYP107L2, we conducted biochemical and structural characterization of CYP107L2 from S. avermitilis. The CYP107L2 gene was cloned, and its recombinant protein was expressed and purified. The CYP107L2 showed a low-spin state of heme, and the reduced form yielded the CO difference spectra with a maximal absorption at 449 nm...
January 22, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27881409/intake-of-individual-saturated-fatty-acids-and-risk-of-coronary-heart-disease-in-us-men-and-women-two-prospective-longitudinal-cohort-studies
#10
Geng Zong, Yanping Li, Anne J Wanders, Marjan Alssema, Peter L Zock, Walter C Willett, Frank B Hu, Qi Sun
OBJECTIVES:  To investigate the association between long term intake of individual saturated fatty acids (SFAs) and the risk of coronary heart disease, in two large cohort studies. DESIGN:  Prospective, longitudinal cohort study. SETTING:  Health professionals in the United States. PARTICIPANTS:  73 147 women in the Nurses' Health Study (1984-2012) and 42 635 men in the Health Professionals Follow-up Study (1986-2010), who were free of major chronic diseases at baseline...
November 23, 2016: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/27847327/solid-cellulose-nanofiber-based-foams-towards-facile-design-of-sustained-drug-delivery-systems
#11
Anna J Svagan, Jan-Willem Benjamins, Zeinab Al-Ansari, Daniel Bar Shalom, Anette Müllertz, Lars Wågberg, Korbinian Löbmann
Control of drug action through formulation is a vital and very challenging topic within pharmaceutical sciences. Cellulose nanofibers (CNF) are an excipient candidate in pharmaceutical formulations that could be used to easily optimize drug delivery rates. CNF has interesting physico-chemical properties that, when combined with surfactants, can be used to create very stable air bubbles and dry foams. Utilizing this inherent property, it is possible to modify the release kinetics of the model drug riboflavin in a facile way...
December 28, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27793475/biochemical-analysis-of-recombinant-cyp4a11-allelic-variant-enzymes-w126r-k276t-and-s353g
#12
Songhee Han, Gun-Su Cha, Young-Jin Chun, Chang Hoon Lee, Donghak Kim, Chul-Ho Yun
Human CYP4A11 is the major ω-hydroxylase of fatty acids in the liver and kidneys. It produces 20-hydroxyeicosatetraenoic acid as well as hydroxylates fatty acids. In this study, we investigated the biochemical properties of three alleles of CYP4A11: W126R, K276T, and S353G. Site-directed mutagenesis of the wild type CYP4A11 was performed, to construct the W126R, K276T, and S353G variant clones. The CYP4A11 wild type and variant constructs were heterologously expressed in Escherichia coli. CO-binding spectra showed the expression of the wild type, K276T and S353G variants, indicating the functional P450 holoenzyme...
December 2016: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/27766599/fatty-acid-microemulsion-for-the-treatment-of-neonatal-conjunctivitis-quantification-characterisation-and-evaluation-of-antimicrobial-activity
#13
Ummara Butt, Amr ElShaer, Lori A S Snyder, Athina Chaidemenou, Raid G Alany
Fatty acids (FAs) are used by many organisms as defence mechanism against virulent bacteria. The high safety profile and broad spectrum of activity make them potential alternatives to currently used topical antibiotics for the treatment of eye infections in neonates. The current study utilised a Design of Experiment approach to optimise the quantification of five fatty acids namely; lauric acid, tridecanoic acid, myristoleic acid, palmitoleic acid and α-linolenic acid. The significance of the influence of the experimental parameters such as volume of catalyst, volume of n-hexane, incubation temperature, incubation time and the number of extraction steps on derivatisation was established by statistical screening with a factorial approach...
December 2016: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/27756558/safety-assessment-of-widely-used-fermented-virgin-coconut-oil-cocos-nucifera-in-malaysia-chronic-toxicity-studies-and-sar-analysis-of-the-active-components
#14
Ahmad H Ibrahim, Md Shamsuddin Sultan Khan, Sawsan S Al-Rawi, Mohamed B Khadeer Ahamed, Aman Shah Bin Abdul Majid, Fouad Saleih R Al-Suede, Dan Ji, Amin Malik Shah Abdul Majid
Fermented Virgin Coconut Oil (FVCO) is widely used in the Southeast Asia as food and traditional medicine. The objective of the present study is the evaluation of chronic safety of the commercialized FVCO of Malaysia and other Southeast Asian countries. A single dose of 5000 mg/kg of FVCO was administered orally in rats (each group, n = 5) for the acute toxicity study and 175, 550 and 2000 mg/kg for sub-chronic and chronic studies (each group, n = 10), respectively. The behavior, mortality, and body weight of the rats were assessed to determine the toxic effects of FVCO...
November 2016: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/27748233/changes-in-in-vitro-gas-and-methane-production-from-rumen-fluid-from-dairy-cows-during-adaptation-to-feed-additives-in-vivo
#15
G Klop, S van Laar-van Schuppen, W F Pellikaan, W H Hendriks, A Bannink, J Dijkstra
The adaptation of dairy cows to methane (CH4)-mitigating feed additives was evaluated using the in vitro gas production (GP) technique. Nine rumen-fistulated lactating Holstein cows were grouped into three blocks and within blocks randomly assigned to one of three experimental diets: Control (CON; no feed additive), Agolin Ruminant® (AR; 0.05 g/kg dry matter (DM)) or lauric acid (LA; 30 g/kg DM). Total mixed rations composed of maize silage, grass silage and concentrate were fed in a 40 : 30 : 30 ratio on DM basis...
October 17, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27738952/degradation-mechanisms-of-polysorbate-20-differentiated-by-18-o-labeling-and-mass-spectrometry
#16
Lin Zhang, Sandeep Yadav, Barthélemy Demeule, Y John Wang, Olivier Mozziconacci, Christian Schӧneich
PURPOSE: To investigate the mechanisms of polysorbate (PS) degradation with the added objective of differentiating the hydrolysis and oxidation pathways. METHODS: Ultra-performance liquid chromatography mass spectrometry (UPLC-MS) was utilized to characterize all-laurate polysorbate 20 (PS20) and its degradants. (18)O stable isotope labeling was implemented to produce (18)O-labeled degradation products of all-laurate PS20 in H2(18)O, with subsequent UPLC-MS analysis for location of the cleavage site on the fatty acid-containing side chain of PS20...
January 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/27733738/characterization-of-palm-fatty-acid-distillate-of-different-oil-processing-industries-of-pakistan
#17
Abdul Sattar Chang, Syed Tufail Hussain Sherazi, Aftab Ahmed Kandhro, Sarfaraz Ahmed Mahesar, Fouzia Chang, Syed Nasrullah Shah, Zahid Hussain Laghari, Tarique Panhwar
Palm fatty acid distillate (PFAD) is cheap and valuable byproduct of edible oil processing industries. This study was designed to characterize PFAD collected from different local oil industries. AOCS methods were used for the determination of physicochemical parameters such as free fatty acid (FFA), saponification value (SV), iodine value (IV), peroxide value (PV) and moisture content. Fatty acid composition was analyzed using GC-MS. Moisture content of samples was found to be in the range between 0.06-7.50%, while FFA, SV, IV and PV were found to be 65...
November 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27723158/shape-memory-of-microscale-and-nanoscale-imprinted-patterns-on-a-supramolecular-polymer-compound
#18
Ying Chen, Zhiyang Zhao, Alamgir Karim, R A Weiss
Surface memory effects for micropattern and nanopattern are demonstrated for shape memory compounds composed of mixtures of the zinc salt of a sulfonated poly(ethylene-co-propylene-co-ethylidene norbornene) ionomer and three different low molar mass fatty acids (FAs): lauric acid (LA), stearic acid (SA), and zinc stearate (ZnSt). This work shows the ability to tune the surface pattern switching temperature (Tc ) by simply varying the FA melting point. The melting point of the FA in the ionomer compound is depressed from that of the pure FA due to strong dipolar interactions between the ionomer and the FAs...
December 2016: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/27712060/composition-by-lc-ms-ms-of-new-carotenoid-esters-in-mango-and-citrus
#19
Fabiane C Petry, Adriana Z Mercadante
Interest in the composition of carotenoid esters of fruits is growing because esterification may affect their bioavailability. Thus, the aim was to provide a detailed identification of carotenoid esters in citrus and mango. Orange cv. 'Valencia' and cv. 'Pera' presented 9 free carotenoids, 38 monoesters, and 60 diesters. Violaxanthin and luteoxanthin derivatives were the major ones, followed by antheraxanthin, lutein, zeaxanthin, β-cryptoxanthin, and zeinoxanthin esters, many of them reported for the first time in orange pulp...
November 2, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27704180/a-simple-method-for-isolation-and-construction-of-markerless-cyanobacterial-mutants-defective-in-acyl-acyl-carrier-protein-synthetase
#20
Kouji Kojima, Sumie Keta, Kazuma Uesaka, Akihiro Kato, Nobuyuki Takatani, Kunio Ihara, Tatsuo Omata, Makiko Aichi
Cyanobacterial mutants defective in acyl-acyl carrier protein synthetase (Aas) secrete free fatty acids (FFAs) into the external medium and hence have been used for the studies aimed at photosynthetic production of biofuels. While the wild-type strain of Synechocystis sp. PCC 6803 is highly sensitive to exogenously added linolenic acid, mutants defective in the aas gene are known to be resistant to the externally provided fatty acid. In this study, the wild-type Synechocystis cells were shown to be sensitive to lauric, oleic, and linoleic acids as well, and the resistance to these fatty acids was shown to be enhanced by inactivation of the aas gene...
December 2016: Applied Microbiology and Biotechnology
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