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https://www.readbyqxmd.com/read/29037738/peptides-derived-from-in-vitro-gastrointestinal-digestion-of-germinated-soybean-proteins-inhibit-human-colon-cancer-cells-proliferation-and-inflammation
#1
Marcela González-Montoya, Blanca Hernández-Ledesma, Jose Manuel Silván, Rosalva Mora-Escobedo, Cristina Martínez-Villaluenga
The aim was to investigate the potential of germinated soybean proteins asa source of peptides with anticancer and anti-inflammatory activities produced after simulated gastrointestinal digestion. Protein concentrate from germinated soybean was hydrolysed with pepsin/pancreatin and fractionated by ultrafiltration. Whole digest and fractions>10, 5-10, and<5kDa caused cytotoxicity to Caco-2, HT-29, HCT-116 human colon cancer cells, and reduced inflammatory response caused by lipopolysaccharide in macrophages RAW 264...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28974795/effect-of-walnut-protein-hydrolysate-on-scopolamine-induced-learning-and-memory-deficits-in-mice
#2
Wenzhi Li, Tiantian Zhao, Jianan Zhang, Jucai Xu, Dongxiao Sun-Waterhouse, Mouming Zhao, Guowan Su
A walnut protein hydrolysate (WPH) was prepared by using a mixture of pancreatin and viscozyme L from industrially available defatted walnut meal. The antioxidant effects of WPH were confirmed and quantified by reducing power, oxygen radical absorbance capacity, hydroxyl radical radical-scavenging activity and ABTS(+)· radical-scavenging activity assays. The protective effects of WPH on scopolamine-induced learning and memory deficits in mice were also evaluated based on in vivo behavioral tests. Results showed that WPH administration would lead to significantly decreased latencies while increased crossing times and target times in the spatial probe test, and increased escape latency and decreased error times in the step-down avoidance test for the scopolamine-induced dementia mice...
September 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28966096/evaluation-of-the-digestibility-of-solid-lipid-nanoparticles-of-glyceryl-dibehenate-produced-by-two-techniques-ultrasonication-and-spray-flash-evaporation
#3
Vincent Jannin, Lucia Blas, Stéphanie Chevrier, Cédric Miolane, Frédéric Demarne, Denis Spitzer
OBJECTIVE: To evaluate the digestibility of Solid Lipid Nanoparticles (SLN) of glyceryl dibehenate prepared either with surfactants by ultrasonication or without surfactant by spray-flash evaporation. METHODS: SLN of glyceryl dibehenate (Compritol® 888 ATO) were produced by two processes: (i) high-shear homogenization with a solution of water-soluble surfactants followed by ultrasonication (ii) and Spray-Flash Evaporation (SFE) of the pure lipid. The digestibility of these nanoparticles was then tested by in vitro lipolysis using a pH-stat apparatus and the assay of glycerides by gel phase chromatography...
September 29, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28946233/impact-of-ultrasonication-on-the-physicochemical-properties-of-sorghum-kafirin-and-in-vitro-pepsin-pancreatin-digestibility-of-sorghum-gluten-like-flour
#4
Andrew C Sullivan, Philipus Pangloli, Vermont P Dia
Sorghum is a nutritionally dense grain but its nutritional quality is limited by its poor digestibility. The objective was to determine the effects of ultrasonication on the physicochemical properties of kafirin, major protein in sorghum, and its stability against pepsin-pancreatin hydrolysis (PPH). Ultrasonication for 10min at 40% amplitude increased the solubility of purified kafirin from 6.5μg/mL to 173.3μg/mL. Ultrasonication altered the secondary structure of kafirin as evaluated by circular dichroism and Fourier-transform infrared red spectroscopy...
February 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28941699/synthesis-of-whey-peptide-iron-complexes-influence-of-using-different-iron-precursor-compounds
#5
Maria Elisa Caetano-Silva, Renata Carolina Alves, Guilherme Nunes Lucena, Regina Célia Galvão Frem, Maria Teresa Bertoldo-Pacheco, Juliana Azevedo Lima-Pallone, Flavia Maria Netto
Iron-binding peptides are an alternative for increasing the bioavailability of iron and to decreasing its pro-oxidant effect. This study aimed to synthesize and characterize peptide-iron complexes using FeCl2 or FeSO4 as the iron precursor compounds. Whey protein isolate (WPI), WPI hydrolyzed with pancreatin, and its fractions obtained via ultrafiltration (cut-off 5kDa) were used as ligands. The fluorescence intensity of the ligands significantly decreased as the iron concentration increased as a result of metal coordination with the iron-binding sites, which may have led to changes in the microenvironment of tryptophan...
November 2017: Food Research International
https://www.readbyqxmd.com/read/28911643/cytotoxic-and-antioxidant-capacity-of-camel-milk-peptides-effects-of-isolated-peptide-on-superoxide-dismutase-and-catalase-gene-expression
#6
Masoud Homayouni-Tabrizi, Ahmad Asoodeh, Mozhgan Soltani
Peptides from natural sources such as milk are shown to have a wide spectrum of biological activities. In this study, three peptides with antioxidant capacity were identified from camel milk protein hydrolysate. Pepsin and pancreatin were used for hydrolysis of milk proteins. Ultrafiltration and reverse-phase high-performance liquid chromatography were used for the concentration and purification of the hydrolysate, respectively. Sequences of the three peptides, which were determined by matrix-assisted laser desorption/ionization time-of-flight spectrophotometry, were LEEQQQTEDEQQDQL [molecular weight (MW): 1860...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28891827/development-of-an-animal-model-for-inducing-various-degrees-of-severity-of-incontinence-associated-dermatitis
#7
Zunjia Wen, Wen Zhu, Qiaoyan Liu, Haiying Zhang, Binbin Mei, Meifen Shen
PURPOSE: The purpose of this study was to describe the biological changes after incontinence-associated dermatitis (IAD) induction by pancreatin in the guinea pigs and to explore the potentially appropriate timing and pancreatin concentration for IAD induction with different severity. DESIGN: In vivo, experimental study. SUBJECTS AND SETTING: An experimental animal model (guinea pig) in a controlled laboratory setting was used for investigation...
September 7, 2017: Journal of Wound, Ostomy, and Continence Nursing
https://www.readbyqxmd.com/read/28873632/magnesium-affects-spinach-carotenoid-bioaccessibility-in-vitro-depending-on-intestinal-bile-and-pancreatic-enzyme-concentrations
#8
Joana Corte-Real, Charles Desmarchelier, Patrick Borel, Elke Richling, Lucien Hoffmann, Torsten Bohn
Magnesium may reduce carotenoid bioavailability by forming insoluble complexes with bile salts/fatty acids, inhibiting micelle formation. Here, we investigated whether altering bile/pancreatin concentration influenced potential negative effects of magnesium on carotenoid bioaccessibility. Spinach (4g) was digested in vitro with added magnesium (0, 200, 400mg/L) and canola oil/coffee creamer, at varying bile extract (1 or 8mM) and pancreatin (100 or 990mg/L) concentrations. Bioaccessibility was determined for β-carotene, lutein, and total carotenoids via HPLC...
January 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28783092/interaction-between-various-apple-procyanidin-and-staphylococcal-enterotoxin-a-and-their-inhibitory-effects-on-toxin-activity
#9
Yuko Shimamura, Chikako Hirai, Yuka Sugiyama, Mio Utsumi, Akio Yanagida, Masatsune Murata, Norio Ohashi, Shuichi Masuda
In this study, we investigated the interaction between apple polyphenols (AP; mainly consisting of procyanidin (PC) from an apple) and staphylococcal enterotoxin A (SEA), and the inhibitory effects of AP on SEA activity. According to the degree of polymerization, in particularly highly polymerized PC (more than pentamer) strongly interacted with SEA. The binding affinity of AP with SEA molecules was determined using Biacore analysis. AP reacted with SEA immobilized on a Biacore sensor chip. After treatment with pepsin and pancreatin, to examine the changes of binding affinity of AP in intragastric conditions, AP maintained interaction with SEA...
August 7, 2017: Toxins
https://www.readbyqxmd.com/read/28707727/in-vitro-renin-angiotensin-system-inhibition-and-in-vivo-antihypertensive-activity-of-peptide-fractions-from-lima-bean-phaseolus-lunatus-l
#10
Norma A Ciau-Solís, Juan J Acevedo-Fernández, David Betancur-Ancona
BACKGROUND: The renin-angiotensin system is key in the physiopathology of arterial hypertension because it converts angiotensin I, via angiotensin I-converting enzyme (ACE), into angiotensin II. In vitro analyses were done of the ACE-inhibitory and renin-inhibitory activities of peptide fractions isolated by enzymatic hydrolysis of lima bean (Phaseolus lunatus) protein. Antihypertensive activity was confirmed in vivo using a rat model. RESULTS: Lima bean protein was hydrolyzed with one of two sequential enzymatic systems (pepsin-pancreatin or Alcalase®-Flavourzyme®)...
July 14, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28684067/roe-derived-phospholipid-administration-enhances-lymphatic-docosahexaenoic-acid-containing-phospholipid-absorption-in-unanesthetized-rats
#11
Kaeko Murota, Mika Takagi, Yomi Watanabe, Akira Tokumura, Takeshi Ohkubo
Plasma n-3 fatty acids are important as the supplying pool of n-3 fatty acids to various tissues including the brain, although the relationship between dietary n-3 fatty acids and their molecular species in the plasma are not fully clarified. We investigated the intestinal absorption of docosahexaenoic acid (DHA) derived from fish roe phospholipid (Roe-PL) and compared it with fish oil triacylglycerol and free DHA using unanesthetized lymph-cannulated rats. The DHA absorption from intraduodenally administered three samples were not significantly different, whereas Roe-PL administration resulted in a significantly higher level of DHA in the phospholipid fraction than the other two samples administrations...
June 28, 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28660455/investigation-of-in-vitro-digestibility-of-dietary-microalga-chlorella-vulgaris-and-cyanobacterium-spirulina-platensis-as-a-nutritional-supplement
#12
Ayse Kose, Mehmet O Ozen, Murat Elibol, Suphi S Oncel
Microalgal proteins are promising sources for functional nutrition and a sustainable candidate for nutraceutical formulations. They also gain importance due to emerging focus on a healthy nutrition and increase in the number of chronic diseases. In this study, dried dietary species of microalga, Chlorella vulgaris, and cyanobacterium Spirulina platensis were hydrolyzed with pancreatin enzyme to obtain protein hydrolysates. The hydrolysis yield of biomass was 55.1 ± 0.1 and 64.8 ± 3.6% for C. vulgaris and S...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28634118/identification-of-chickpea-seed-proteins-resistant-to-simulated-in-vitro-human-digestion
#13
I C Ribeiro, C C Leclercq, N Simões, A Toureiro, I Duarte, J B Freire, M M Chaves, J Renaut, C Pinheiro
Proteins and peptides able to resist gastrointestinal digestion and reach the intestinal mucosa have the potential to influence human health. Chickpea (Cicer arietinum L.) seed proteins are able to resist cooking (86.9% total protein) and/or in vitro simulated human digestion (15.9% total protein resists soaking, cooking and digestion with pepsin and pancreatin). To identify and characterize proteins resisting digestion we made use of different MS methodologies. The efficiency of several proteases (trypsin, AspN, chymotrypsin and LysC) was tested, and two technologies were employed (MALDI-TOF-TOF and LC-nESI-MS/MS)...
June 17, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28627065/evaluation-of-an-in%C3%A2-vitro-system-to-simulate-equine-foregut-digestion-and-the-influence-of-acidity-on-protein-and-fructan-degradation-in-the-horse-s-stomach
#14
S Strauch, B Wichert, J M Greef, D Hillegeist, A Zeyner, A Liesegang
The aim of this study was to improve an in vitro system in order to gather optimized information on the digestion of different forages in the horse's upper gastrointestinal tract. Therefore, foregut digestion of several forages was simulated in vitro (Part 1). The effect of different pH values on in vitro fructan degradation of two selected grasses (Part 2) was tested subsequently. Part 1: We hypothesized that our system produces representative results simulating digestive processes in the upper alimentary tract, but neglects microbial fermentation...
June 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28585158/properties-of-probiotics-kocuria-sm1-and-rhodococcus-sm2-isolated-from-fish-guts
#15
S M Sharifuzzaman, Hafizur Rahman, Dawn A Austin, B Austin
This study characterized probiotics Kocuria SM1 and Rhodococcus SM2, which were recovered from the intestinal microbiota of rainbow trout (Oncorhynchus mykiss, Walbaum). The cultures were Gram-positive, non-motile, catalase-positive and oxidase-negative cocci or rods. Cell multiplication of SM1 and SM2 was observed at 4-37 °C (45 °C for SM1), in 0-20% (w/v) NaCl and at pH 2-11. The viability was not affected when exposed to pepsin at pH 2.0 and 3.0, and pancreatin at pH 8.0. Neither isolates were chrome azurol S-positive for siderophore production...
June 5, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28576004/preparation-of-poly-lactic-co-glycolic-acid-and-chitosan-composite-nanocarriers-via-electrostatic-self-assembly-for-oral-delivery-of-insulin
#16
Bin Xu, Guohua Jiang, Weijiang Yu, Depeng Liu, Yongkun Liu, Xiangdong Kong, Juming Yao
To improve insulin bioavailability and overcome multiple barriers for oral delivery of insulin, the composite nanocarriers (PLGA/FA-CS) prepared from poly(lactide-co-glycoside) (PLGA) and folic acid modified chitosan (FA-CS) were fabricated via electrostatic self-assembly method. The resultant composite nanocarriers exhibited low cytotoxicity against HT-29 cells and excellent stability against protein solution. The chemical stability of loaded insulin against digestive enzyme were established in presence of simulated gastric fluid (SGF) containing pepsin and simulated intestinal fluid (SIF) containing pancreatin, respectively...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28568309/effect-of-soybean-husk-supplementation-on-the-fecal-fermentation-metabolites-and-microbiota-of-dogs
#17
Htun Myint, Yu Iwahashi, Satoshi Koike, Yasuo Kobayashi
In vitro fermentation and in vivo feeding experiments were conducted to characterize the effects of soybean (Glycine max) husk on the fecal fermentation metabolites and microbiota of dogs. An in vitro fermentation study using feces from three Toy Poodle dogs (6.5 ± 3.5 months in age and 2.9 ± 0.4 kg in body weight) revealed that the fecal inoculum was able to ferment soybean husk (supplemented at 0.01 g/mL culture) and increased levels of short chain fatty acids (SCFA) and Bifidobacterium, irrespective of pre-digestion of the husk by pepsin and pancreatin...
June 1, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28506800/behaviour-of-silver-nanoparticles-in-simulated-saliva-and-gastrointestinal-fluids
#18
Lucie Pinďáková, Věra Kašpárková, Kristina Kejlová, Markéta Dvořáková, Daniel Krsek, Dagmar Jírová, Lucie Kašparová
Continuously increasing application of silver nanoparticles (AgNPs) requires information on their safety and performance under biological conditions. Assessment of AgNPs in biological systems is also related to availability of robust toxicological methods for evaluation of toxic potential of AgNPs and information on their physicochemical state. Silver nanoparticles were subjected to action of simulated saliva, gastric and intestinal fluids, appropriately supplemented with digestive enzymes pepsin or pancreatin...
May 12, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28462499/incorporation-of-lipolysis-in-monolayer-permeability-studies-of-lipid-based-oral-drug-delivery-systems
#19
Tanmoy Sadhukha, Buddhadev Layek, Swayam Prabha
Lipid-based drug delivery systems, a well-tolerated class of formulations, have been evaluated extensively to enhance the bioavailability of poorly soluble drugs. However, it has been difficult to predict the in vivo performance of lipid dosage forms based on conventional in vitro techniques such as cell monolayer permeability studies because of the complexity of the gastrointestinal processing of lipid formulations. In the current study, we explored the feasibility of coupling Caco-2 and Madin-Darby canine kidney monolayer permeability studies with lipolysis, a promising in vitro technique to evaluate lipid systems...
May 1, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28460976/in-vitro-versus-in-vivo-protein-digestibility-techniques-for-calculating-pdcaas-protein-digestibility-corrected-amino-acid-score-applied-to-chickpea-fractions
#20
Olga Luisa Tavano, Valdir Augusto Neves, Sinézio Inácio da Silva Júnior
Seven different in vitro methods to determine the protein digestibility for chickpea proteins were considered and also the application of these methodologies for calculating PDCAAS (protein digestibility-corrected amino acid score), seeking their correlations with the in vivo methodology. In vitro digestibility of raw and heated samples were determined using pepsin-pancreatin hydrolysis, considering soluble nitrogen via Kjeldahl (ppKJ) and hydrolysed peptide linkages using trinitrobenzenesulfonic acid and o-phthaldialdehyde...
November 2016: Food Research International
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