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Whey protein

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https://www.readbyqxmd.com/read/28741804/does-whey-protein-supplementation-improve-the-nutritional-status-in-hypoalbuminemic-peritoneal-dialysis-patients
#1
Kamal Hassan
Limited data are available regarding the effects of whey protein on the nutritional status of the peritoneal dialysis population. This study evaluated the effects of whey protein supplementation for 12 weeks on the nutritional status in hypoalbuminemic peritoneal dialysis patients. Thirty-six stable adult patients on maintenance peritoneal dialysis with serum albumin levels <3.5 g/dL were enrolled in the study and were divided into two groups similar in their serum albumin and normalized protein equivalent of total nitrogen appearance (nPNA)...
July 25, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28740977/effects-of-addition-of-hydrocolloids-on-the-textural-and-structural-properties-of-high-protein-intermediate-moisture-food-model-systems-containing-sodium-caseinate
#2
J Li, Y Wu, Y Ma, N Lu, J M Regenstein, P Zhou
High-protein intermediate moisture food (HPIMF) containing sodium caseinate (NaCN) often gave a harder texture compared with that made from whey proteins or soy proteins, due to the aggregation of protein particles. The objectives of this study were to explore whether the addition of hydrocolloids could soften the texture and illustrate the possible mechanism. Three kinds of hydrocolloids, xanthan gum, κ-carrageenan, and gum arabic were chosen, and samples including of these three kinds of hydrocolloids were studied through texture analysis using a TPA test and microstructure observation by confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM)...
July 25, 2017: Food & Function
https://www.readbyqxmd.com/read/28738702/combined-effects-of-whey-protein-hydrolysates-and-probiotics-on-oxidative-stress-induced-by-an-iron-overloaded-diet-in-rats
#3
Eunju Park, Hyun-Dong Paik, Seung-Min Lee
Whey proteins possess antioxidant properties, and probiotics have various health-promoting effects. We investigated the effects of whey protein hydrolysates (WPHs) and probiotics in rats exposed to oxidative stress induced by iron-overload diet (IOL). Rats were divided into control (CTRL), IOL (0.2% ferrous sulphate), WPH (10%), probiotic (PB) mixture (Lactococcus lactis NK34 and B. polyfermenticus SCD), and WPH + PB group for 6 weeks. Average leukocytes and colonocytes tail moments were increased in IOL compared to CTRL but decreased in other groups...
July 25, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28733010/effects-of-high-intensity-ultrasound-on-acid-induced-gelation-properties-of-whey-protein-gel
#4
Xue Shen, Changhui Zhao, Mingruo Guo
Pre-heated whey protein isolate (WPI) solution (10% w/v, 85°C for 30min) was prepared and subjected to high-intensity ultrasound (HUS, 20kHz) at different durations (5-40min) before acidification to determine the effects of HUS on glucono-δ-lactone (GDL)-induced gelation properties of whey protein gel. Results showed that HUS reduced the particle size and increased surface free sulfhydryl groups of pre-heated whey protein solution. Free sulfhydryl (-SH) content of the acid-induced WPI gels (GIWG) and protein solubility in presence of 8M urea were significantly reduced (P<0...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28732731/atomization-of-denatured-whey-proteins-as-a-novel-and-simple-way-to-improve-oral-drug-delivery-system-properties
#5
Hassana Hsein, Ghislain Garrait, Muhammad Ashraful Mumin, Eric Beyssac, Valérie Hoffart
In the sphere of drug delivery, denatured whey protein (DWP) has in recent times gained press. However, to date, no scalable and affordable dosage form has been developed. The objective of our study was to evaluate the potential use of spray-dried DWP as a ready to use excipient for oral drug delivery. Therefore, solid state, FTIR spectra and wettability were studied. Dissolution, mucoadhesion and the effect on paracellular permeability were also evaluated. The spray-dried DWP particles were spherical with 4μm mean diameter...
July 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28730743/inulin-type-fructans-and-whey-protein-both-modulate-appetite-but-only-fructans-alter-gut-microbiota-in-adults-with-overweight-obesity-a-randomized-controlled-trial
#6
Raylene A Reimer, Holly J Willis, Jasmine M Tunnicliffe, Heekuk Park, Karen L Madsen, Adriana Soto-Vaca
SCOPE: Independently, prebiotics and dietary protein have been shown to improve weight loss and/or alter appetite. Our objective was to determine the effect of combined prebiotic and whey protein on appetite, body composition and gut microbiota in adults with overweight/obesity. METHODS AND RESULTS: In a 12 week, placebo-controlled, double-blind study, 125 adults with overweight/obesity were randomly assigned to receive isocaloric snack bars of: 1) Control; 2) Inulin-type fructans (ITF); 3) Whey protein; 4) ITF + Whey protein...
July 21, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28729389/severe-energy-deficit-up-regulates-leptin-receptors-leptin-signaling-and-ptp1b-in-human-skeletal-muscle
#7
Ismael Perez-Suarez, Jesus Gustavo Ponce-Gonzalez, Jaime de La Calle-Herrero, Jose Losa-Reyna, Marcos Martin-Rincon, David Morales-Alamo, Alfredo Santana, Hans-Christer Holmberg, Jose A L Calbet
In obesity, leptin receptors (OBR) and leptin signaling in skeletal muscle are down-regulated. To determine whether OBR and leptin signaling are up-regulated with a severe energy deficit fifteen overweight men were assessed before (PRE), after 4 days of caloric restriction (3.2 Kcal/kg BW/day) in combination with prolonged exercise (CRE) (8h walking + 45min single-arm cranking/day) to induce an energy deficit of ~5500 Kcal/d, and following 3 days of control diet (isoenergetic) and reduced exercise (CD). During CRE, the diet consisted solely of whey protein (n=8) or sucrose (n=7) (0...
July 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28727654/growth-and-nutritional-biomarkers-of-preterm-infants-fed-a-new-powdered-human-milk-fortifier-a-randomized-trial
#8
Jacques Rigo, Jean-Michel Hascoët, Claude Billeaud, Jean-Charles Picaud, Fabio Mosca, Amandine Rubio, Elie Saliba, Michaël Radkë, Umberto Simeoni, Bernard Guillois, Virginie de Halleux, Jonathan Jaeger, Laurent Ameye, Nicholas P Hays, Johannes Spalinger
OBJECTIVES: Assess growth and nutritional biomarkers of preterm infants fed human milk (HM) supplemented with a new powdered HM fortifier (nHMF) or a control HM fortifier (cHMF). The nHMF provides similar energy content, 16% more protein (partially hydrolyzed whey), and higher micronutrient levels than the cHMF, along with medium-chain triglycerides and docosahexaenoic acid. METHODS: In this controlled, multicenter, double-blind study, a sample of preterm infants ≤32 weeks or ≤1500 g were randomized to receive nHMF (n = 77) or cHMF (n = 76) for a minimum of 21 days...
July 19, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28720963/releasing-characteristics-of-anthocyanins-extract-in-pectin-whey-protein-complex-microcapsules-coated-with-zein
#9
Arranee Chotiko, Subramaniam Sathivel
This study investigated pectin-based capsules as delivery systems for purple rice bran anthocyanin extract (AE) during exposure to simulated gastrointestinal conditions. Four different capsules loaded with AE were prepared by ionotropic gelation/extrusion, including (1) pectin capsules (PE), (2) pectin capsules coated with zein (PE/ZE), (3) pectin-whey protein isolate complex capsules (PE + WP), and (4) pectin-whey protein isolate complex capsules coated with zein (PE + WP/ZE). CaCl2 in an ethanol solution with or without zein was used as a crosslinking solution...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720959/fortification-of-the-whey-protein-isolate-antioxidant-and-antidiabetic-activity-with-fraction-rich-in-phenolic-compounds-obtained-from-stevia-rebaudiana-bert-bertoni-leaves
#10
Paula Gimenez Milani, Maysa Formigoni, Yago Carvalho Lima, Silvano Piovan, Giuliana Maria Ledesma Peixoto, Daiane Montoia Camparsi, Willian do Nascimento da Silva Rodrigues, Jordana Quaglia Pereira da Silva, Alexandre da Silva Avincola, Eduardo Jorge Pilau, Cecília Edna Mareze da Costa, Silvio Cláudio da Costa
A stevia fraction (ASF) free of steviol glycosides was extracted from Stevia rebaudiana leaves (Stevia UEM-13). ASF essentially constitutes phenolic compounds (52.42%), which were identified by liquid chromatography tandem mass spectrometry (LC-MS/MS) as caffeic acid, quercetin-3-o-glycoside, cyanidin-3-glucoside, kaempferol, quercetin, apigenin, rozmarinic acid, chlorogenic acid and dicaffeoylquinic acid. ASF was used as a multi-functional source of phenolic compounds to fortify the whey protein isolate (WPI) obtained by membrane separation...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720947/reduction-of-whey-protein-concentrate-antigenicity-by-using-a-combined-enzymatic-digestion-and-ultrafiltration-approach
#11
Laura Quintieri, Linda Monaci, Federico Baruzzi, Maria Gabriella Giuffrida, Silvia de Candia, Leonardo Caputo
The global interest in saving food resources is leading to recycle wasted-food materials to extract useful nutrients. In dairy industry, the recycling of whey proteins determines their utilization in the healthy-addressed foods, which, however, can cause immunological responses in allergic subjects. In this work, a whey protein concentrate (WPC) was alternatively hydrolyzed with pepsin, papain, trypsin and rennin in order to attenuate or abolish the β-lactoglobulin (BLG) antigenicity. The electrophoretic profiles of both pepsin and papain WPC hydrolysates proved the disappearance of the BLG band, even though a slight antigenicity was still found by ELISA...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28719669/a-whey-protein-based-multi-ingredient-nutritional-supplement-stimulates-gains-in-lean-body-mass-and-strength-in-healthy-older-men-a-randomized-controlled-trial
#12
Kirsten E Bell, Tim Snijders, Michael Zulyniak, Dinesh Kumbhare, Gianni Parise, Adrian Chabowski, Stuart M Phillips
Protein and other compounds can exert anabolic effects on skeletal muscle, particularly in conjunction with exercise. The objective of this study was to evaluate the efficacy of twice daily consumption of a protein-based, multi-ingredient nutritional supplement to increase strength and lean mass independent of, and in combination with, exercise in healthy older men. Forty-nine healthy older men (age: 73 ± 1 years [mean ± SEM]; BMI: 28.5 ± 1.5 kg/m2) were randomly allocated to 20 weeks of twice daily consumption of either a nutritional supplement (SUPP; n = 25; 30 g whey protein, 2...
2017: PloS One
https://www.readbyqxmd.com/read/28712368/inferring-genetic-parameters-on-latent-variables-underlying-milk-yield-and-quality-protein-composition-curd-firmness-and-cheese-making-traits-in-dairy-cattle
#13
C Dadousis, C Cipolat-Gotet, G Bittante, A Cecchinato
We studied the genetics of cheese-related latent variables (factors; Fs) for application in dairy cattle breeding. In total, 26 traits, recorded in 1264 Brown Swiss cows, were analyzed through multivariate factor analysis (MFA). Traits analyzed were descriptors of milk quality and yield (including protein fractions) and measures of coagulation, curd firmness (CF), cheese yields (%CY) and nutrient recoveries in the curd (REC). A total of 10 Fs (mutual orthogonal with a varimax rotation) were obtained. To assess the practical use of the Fs into breeding, we inferred their genetic parameters using single and bivariate animal models under a Bayesian framework...
July 17, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28711271/identification-of-dipeptidyl-peptidase-iv-inhibitory-peptides-from-mare-whey-protein-hydrolysates
#14
J J Song, Q Wang, M Du, X M Ji, X Y Mao
Inhibition of dipeptidyl peptidase-IV (DPP-IV) activity is a promising strategy for treatment of type 2 diabetes. In current study, DPP-IV inhibitory peptides were identified from mare whey protein hydrolysates obtained by papain. The results showed that all the mare whey protein hydrolysates obtained at various hydrolysis durations possessed more potent DPP-IV inhibitory activity in comparison with intact whey protein. The 4-h hydrolysates showed the greatest DPP-IV inhibitory activity with half-maximal inhibitory concentration of 0...
July 12, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28709970/selective-effects-of-whey-protein-concentrate-on-glutathione-levels-and-apoptosis-in-rats-with-mammary-tumors
#15
Shih-Hsuan Cheng, Yang-Ming Tseng, Szu-Hsien Wu, Shih-Meng Tsai, Li-Yu Tsai
Glutathione (GSH) plays an important role in antioxidant defense and regulation of apoptosis. GSH deficiency is related to many diseases, including cancer, and increased GSH levels in cancer cells are associated with chemotherapy resistance because of resistance to apoptosis. In this study, we investigated the effects of whey protein concentrate (WPC), a precursor of GSH, in rats with mammary tumors induced by treatment with 7,12-dimethylbenz(a)anthracene (DMBA). DMBA treatment results in cellular changes that mimic the initiation and promotion of carcinogenesis of breast tissue...
July 11, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28702650/influence-of-calcium-induced-droplet-heteroaggregation-on-the-physicochemical-properties-of-oppositely-charged-lactoferrin-coated-lutein-droplets-and-whey-protein-isolate-coated-dha-droplets
#16
Xin Li, Xu Wang, Duoxia Xu, Yanping Cao, Shaojia Wang, Bei Wang, Chengtao Wang, Baoguo Sun
The influence of calcium-induced droplet heteroaggregation on the formation and physicochemical stability of mixed lutein and DHA emulsions was studied. Heteroaggregation was induced by mixing oppositely charged lactoferrin (LF)-coated lutein and whey protein isolate (WPI)-coated DHA emulsions with different CaCl2 concentrations at pH 6.0. The droplet size, zeta-potential, transmission-physical stability and microstructure behavior (CLSM and Cryo-SEM) of single-protein emulsions and mixed emulsions were measured as a function of different CaCl2 concentrations...
July 12, 2017: Food & Function
https://www.readbyqxmd.com/read/28702643/antioxidant-ace-inhibitory-and-antimicrobial-activity-of-fermented-goat-milk-activity-and-physicochemical-property-relationship-of-the-peptide-components
#17
Miriam Moreno-Montoro, Manuel Olalla-Herrera, José Ángel Rufián-Henares, Rafael Giménez Martínez, Beatriz Miralles, Triana Bergillos, Miguel Navarro-Alarcón, Paula Jauregi
Increasing evidence on goat milk and the health benefits of its derived products beyond its nutritional value show its potential as a functional food. In this study, goat milk fractions were tested for their total antioxidant capacity using different methods (ORAC, ABTS, DPPH and FRAP), as well as their angiotensin-I-converting-enzyme inhibitory and antimicrobial (against Escherichia coli and Micrococcus luteus) activities. Different whey fractions (whey, cation exchange membrane permeate P and retentate R) of two fermented skimmed goat milks (ultrafiltered goat milk fermented with the classical starter bacteria or with the classical starter plus the Lactobacillus plantarum C4 probiotic strain) were assessed...
July 13, 2017: Food & Function
https://www.readbyqxmd.com/read/28698349/a-pilot-randomised-controlled-trial-of-a-periodised-resistance-training-and-protein-supplementation-intervention-in-prostate-cancer-survivors-on-androgen-deprivation-therapy
#18
Jacqueline L Kiwata, Tanya B Dorff, E Todd Schroeder, George J Salem, Christianne J Lane, Judd C Rice, Mitchell E Gross, Christina M Dieli-Conwright
INTRODUCTION: Prostate cancer survivors (PCS) receiving androgen deprivation therapy (ADT) experience deleterious side effects such as unfavourable changes in cardiometabolic factors that lead to sarcopenic obesity and metabolic syndrome (MetS). While loss of lean body mass (LBM) compromises muscular strength and quality of life, MetS increases the risk of cardiovascular disease and may influence cancer recurrence. Exercise can improve LBM and strength, and may serve as an alternative to the pharmacological management of MetS in PCS on ADT...
July 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28696380/whey-protein-supplementation-enhances-whole-body-protein-metabolism-and-performance-recovery-after-resistance-exercise-a-double-blind-crossover-study
#19
Daniel W D West, Sidney Abou Sawan, Michael Mazzulla, Eric Williamson, Daniel R Moore
No study has concurrently measured changes in free-living whole body protein metabolism and exercise performance during recovery from an acute bout of resistance exercise. We aimed to determine if whey protein ingestion enhances whole body net protein balance and recovery of exercise performance during overnight (10 h) and 24 h recovery after whole body resistance exercise in trained men. In a double-blind crossover design, 12 trained men (76 ± 8 kg, 24 ± 4 years old, 14% ± 5% body fat; means ± standard deviation (SD)) performed resistance exercise in the evening prior to consuming either 25 g of whey protein (PRO; MuscleTech 100% Whey) or an energy-matched placebo (CHO) immediately post-exercise (0 h), and again the following morning (~10 h of recovery)...
July 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28693995/application-of-whey-protein-pectin-nano-complex-carriers-for-loading-of-lactoferrin
#20
Masoomeh Raei, Fakhri Shahidi, Majid Farhoodi, Seid Mahdi Jafari, Ali Rafe
Our aim was to entrap lactoferrin (LF) in complex nano-particles of whey protein isolate (WPI)-high methoxyl pectin (HMP) with the ratios of 2:1, 1:1, and 1:2 through acidification at pH values of 3, 3.5, and 4. The zeta-potential, size, sedimentable-complex yield, LF content, encapsulation efficiency, SEM, AFM, FTIR, and DSC of nano-particles were investigated. Our results revealed that almost all analyzed parameters of the final nano-particles were related to preparation pH value, WPI/HMP ratios, and acidification methods In both methods of pre- and post-acidification, the zeta potential was decreased via decreasing of pH from 4 to 3 and particle size was increased at higher HMP ratios to WPI...
July 7, 2017: International Journal of Biological Macromolecules
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