1
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Fan N, Shewan HM, Yakubov GE, Stokes JR. Structure Response of Preadsorbed Saliva Pellicle to the Interaction between Dairy and Saliva Protein. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:11516-11525. [PMID: 38778622 DOI: 10.1021/acs.langmuir.4c00626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Using the surface characterization techniques of quartz crystal microbalance with dissipation, atomic force microscopy, and scanning electron microscopy, the structure of the salivary pellicle was investigated before and after it was exposed to dairy proteins, including micellar casein, skim milk, whey protein isolate (WPI), and a mixture of skim milk and WPI. We have shown that the hydration, viscoelasticity, and adsorbed proteinaceous mass of a preadsorbed salivary pellicle on a PDMS surface are greatly affected by the type of dairy protein. After interaction with whey protein, the preadsorbed saliva pellicle becomes softer. However, exposure of the saliva pellicle to micellar casein causes the pellicle to partially collapse, which results in a thinner and more rigid surface layer. This structure change correlates with the measured lubrication behavior when the saliva pellicle is exposed to dairy proteins. While previous studies suggest that whey protein is the main component in milk to interact with salivary proteins, our study indicates interactions with casein are more important. The knowledge gained here provides insights into the mechanisms by which different components of dairy foods and beverages contribute to mouthfeel and texture perception, as well as influence oral hygiene.
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Affiliation(s)
- Nengneng Fan
- The School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Heather M Shewan
- The School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Gleb E Yakubov
- The School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jason R Stokes
- The School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
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2
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Shirazi HA, Lee S, Ullah S, Almdal K. Structural and tribological studies on the interaction of porcine gastric mucin with non- and cationic-modified β-lactoglobulins. Colloids Surf B Biointerfaces 2024; 238:113924. [PMID: 38669751 DOI: 10.1016/j.colsurfb.2024.113924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/16/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
β-lactoglobulin (BLG) is the major whey protein with negative charges at neutral pH in aqueous media. Thus, the interaction with mucins, the major polyanionic component of mucus, is very weak due to the electrostatic repulsion between them. The present study postulates that cationization of BLG molecules may reverse the interaction characteristics between BLG and mucin from repulsive to associative. To this end, cationic-modified BLGs were prepared by grafting positively charged ethylenediamine (EDA) moieties into the negatively charged carboxyl groups on the aspartic and glutamic acid residues and compared with non-modified BLG upon mixing with porcine gastric mucin (PGM). To characterize the structural and conformational features of PGM, non/cationized BLGs, and their mixtures, various spectroscopic approaches, including zeta potential, dynamic light scattering (DLS), and circular dichroism (CD) spectroscopy were employed. Importantly, we have taken surface adsorption with optical waveguide lightmode spectroscopy (OWLS), and tribological properties with pin-on-disk tribometry at the sliding interface as the key approaches to determine the interaction nature between them as mixing PGM with polycations can lead to synergistic lubrication at the nonpolar substrate in neutral aqueous media as a result of an electrostatic association. All the spectroscopic studies and a substantial improvement in lubricity collectively supported a tenacious and associative interaction between PGM and cationized BLGs, but not between PGM and non-modified BLG. This study demonstrates a unique and successful approach to intensify the interaction between BLG and mucins, which is meaningful for a broad range of disciplines, including food science, macromolecular interactions, and biolubrication etc.
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Affiliation(s)
- Hadi Asgharzadeh Shirazi
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark; Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, LS2 JT9, Leeds, The United Kingdom.
| | - Saif Ullah
- Department of Chemistry, Technical University of Denmark, DTU Chemistry, DK-2800, Kgs. Lyngby, Denmark
| | - Kristoffer Almdal
- Department of Chemistry, Technical University of Denmark, DTU Chemistry, DK-2800, Kgs. Lyngby, Denmark
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3
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Al Zahabi K, Hassan L, Maldonado R, Boehm MW, Baier SK, Sharma V. Pinching dynamics, extensional rheology, and stringiness of saliva substitutes. SOFT MATTER 2024; 20:2547-2561. [PMID: 38407364 DOI: 10.1039/d3sm01662e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Saliva substitutes are human-made formulations extensively used in medicine, food, and pharmaceutical research to emulate human saliva's biochemical, tribological, and rheological properties. Even though extensional flows involving saliva are commonly encountered in situations such as swallowing, coughing, sneezing, licking, drooling, gleeking, and blowing spit bubbles, rheological evaluations of saliva and its substitutes in most studies rely on measured values of shear viscosity. Natural saliva possesses stringiness or spinnbarkeit, governed by extensional rheology response, which cannot be evaluated or anticipated from the knowledge of shear rheology response. In this contribution, we comprehensively examine the rheology of twelve commercially available saliva substitutes using torsional rheometry for rate-dependent shear viscosity and dripping-onto-substrate (DoS) protocols for extensional rheology characterization. Even though most formulations are marketed as having suitable rheology, only three displayed measurable viscoelasticity and strain-hardening. Still, these too, failed to emulate the viscosity reduction with the shear rate observed for saliva or match perceived stringiness. Finally, we explore the challenges in creating saliva-like formulations for dysphagia patients and opportunities for using DoS rheometry for diagnostics and designing biomimetic fluids.
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Affiliation(s)
- Karim Al Zahabi
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
| | - Lena Hassan
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
| | - Ramiro Maldonado
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
| | | | - Stefan K Baier
- Motif FoodWorks Inc., Boston, MA 02210, USA
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Vivek Sharma
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
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4
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Effect of mucin on β-lactoglobulin and lactose interaction. J DAIRY RES 2023. [DOI: 10.1017/s0022029923000092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Abstract
Functions of mucin, as the major macromolecular component in saliva or gastric fluids, are drawing increasing attention in the context of understanding the oral processing or digestion of dairy foods at the molecular level. This study was designed to investigate the interactions between β-lactoglobulin (BLG)-lactose, mucin-lactose and BLG-lactose-mucin at the molecular level under different temperature and pH conditions using fluorescence spectroscopy in combination with scanning electron microscopes (sem). It is the first study of its kind. There was no lactose-dependent quenching on BLG fluorophore in the range of 0–10 mM lactose concentration. On the contrary, there was a continuous increase in the fluorescence intensity of the BLG protein when the lactose concentration increased, especially at 25°C. BLG-lactose complex became thermally unstable at 37 and 45°C. Moreover, BLG exhibited a pH dependent conformational change and had higher fluorescence intensity at pH 3 than pH 6.8. The fluorescence result was in correspondence with sem images where we observed lactose crystals gathering around and on the BLG molecule, but lactose molecules could not be seen in the presence of mucin. It was anticipated that mucin molecules interacted with BLG-lactose complex via electrostatic attraction and formed an extra protective layer around the BLG molecules to avoid solvent exposure.
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5
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Agorastos G, van Nielen O, van Halsema E, Scholten E, Bast A, Klosse P. Lubrication behavior of ex-vivo salivary pellicle influenced by tannins, gallic acid and mannoproteins. Heliyon 2022; 8:e12347. [PMID: 36582694 PMCID: PMC9793261 DOI: 10.1016/j.heliyon.2022.e12347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/03/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
The objective of this study was to investigate the influence of tannins and gallic acid on the salivary lubrication behavior. Furthermore, the effects of pH and mannoproteins in combination with gallic acid on the lubrication of saliva were studied. The addition of gallic acid and tannins were found to increase friction caused by the removal of the saliva film. Tannins resulted in higher friction compared to gallic acid. Lowering pH increased friction of gallic acid mixtures with saliva, due to stronger interactions between gallic acid and saliva. The increased friction caused by gallic acid was inhibited by the addition of mannoproteins due to the hydrogen bond interactions between gallic acid and mannoproteins, thereby decreasing the complex formation between gallic acid and salivary proteins. A correlation of 0.96 was found between the hydrodynamic diameter of the aggregate and the delta friction suggesting that the formation of aggregates determined the lubrication behavior.
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Affiliation(s)
- Georgios Agorastos
- Faculty of Science and Engineering Department, Maastricht University, Nassaustraat 36, 5911 BV, Venlo, the Netherlands
- T.A.S.T.E. Foundation, Garstkampsestraat 11, Overasselt, 6611 KS, the Netherlands
- Corresponding author.
| | - Olaf van Nielen
- Physics and Physical Chemistry of Food, Wageningen University, Bronse Weilanden 9, Wageningen, the Netherlands
| | - Emo van Halsema
- T.A.S.T.E. Foundation, Garstkampsestraat 11, Overasselt, 6611 KS, the Netherlands
| | - Elke Scholten
- Physics and Physical Chemistry of Food, Wageningen University, Bronse Weilanden 9, Wageningen, the Netherlands
| | - Aalt Bast
- Faculty of Science and Engineering Department, Maastricht University, Nassaustraat 36, 5911 BV, Venlo, the Netherlands
| | - Peter Klosse
- T.A.S.T.E. Foundation, Garstkampsestraat 11, Overasselt, 6611 KS, the Netherlands
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6
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Protein-induced delubrication: How plant-based and dairy proteins affect mouthfeel. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Li B, Gu W, Bourouis I, Sun M, Huang Y, Chen C, Liu X, Pang Z. Lubrication behaviors of core-shell structured particles formed by whey proteins and xanthan gum. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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8
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Corvera-Paredes B, Sánchez-Reséndiz AI, Medina DI, Espiricueta-Candelaria RS, Serna-Saldívar S, Chuck-Hernández C. Soft Tribology and Its Relationship With the Sensory Perception in Dairy Products: A Review. Front Nutr 2022; 9:874763. [PMID: 35662955 PMCID: PMC9161289 DOI: 10.3389/fnut.2022.874763] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 04/07/2022] [Indexed: 11/13/2022] Open
Abstract
Nowadays, dairy products, especially fermented products such as yogurt, fromage frais, sour cream and custard, are among the most studied foods through tribological analysis due to their semi-solid appearance and close relationship with attributes like smoothness, creaminess and astringency. In tribology, dairy products are used to provide information about the friction coefficient (CoF) generated between tongue, palate, and teeth through the construction of a Stribeck curve. This provides important information about the relationship between friction, food composition, and sensory attributes and can be influenced by many factors, such as the type of surface, tribometer, and whether saliva interaction is contemplated. This work will review the most recent and relevant information on tribological studies, challenges, opportunity areas, saliva interactions with dairy proteins, and their relation to dairy product sensory.
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Affiliation(s)
| | | | - Dora I. Medina
- Tecnologico de Monterrey, School of Engineering and Sciences, Atizapán de Zaragoza, Mexico
| | | | | | - Cristina Chuck-Hernández
- Tecnologico de Monterrey, The Institute for Obesity Research, Monterrey, Mexico
- *Correspondence: Cristina Chuck-Hernández
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9
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Sharma M, Pondicherry KS, Duizer L. Understanding relations between rheology, tribology, and sensory perception of modified texture foods. J Texture Stud 2021; 53:327-344. [PMID: 34921392 DOI: 10.1111/jtxs.12656] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/27/2021] [Accepted: 12/08/2021] [Indexed: 11/30/2022]
Abstract
The aim of this work was to examine relations between instrumental and sensory parameters in a texture modified food matrix, with and without saliva. Nine pureed carrot samples (eight thickened and a control) were developed with starch (0.4 and 0.8% wt/wt), xanthan (0.2 and 0.4% wt/wt) or starch-xanthan blends that met International Dysphagia Diet Standardisation Initiative (IDDSI) Level 4 guidelines using fork and spoon tests. Rheological and tribological tests were conducted on the food and simulated bolus prepared by adding fresh stimulated saliva to the food (1:5, saliva:food) to mimic oral processing. Perceived sensory properties were identified using a temporal dominance of sensations (TDS) test (n = 16) where panelists were given a list of nine attributes. The area under the curve was extracted from TDS curves for each attribute/sample and this was correlated with rheological (viscosity at 10 s-1 , G', G″, and tan δ at 1 Hz) and tribological (friction coefficient in three regimes) data. The viscosity of the control sample decreased after adding hydrocolloids (except Starch_0.8%) and with saliva incorporation. G' and G″ either increased or were similar for xanthan and blends and decreased for starch-thickened samples. Hydrocolloid addition increased friction for all samples and was higher with saliva addition. Sensory results showed that samples with starch were perceived as thick and grainy while xanthan was perceived as smooth and slippery. A greater number of sensory attributes correlated with viscoelastic parameters compared to friction coefficients. Correlations were highest with the saliva added samples, further highlighting the importance of including saliva during instrumental testing.
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Affiliation(s)
- Madhu Sharma
- Department of Food Science, University of Guelph, Guelph, Ontario, Canada
| | | | - Lisa Duizer
- Department of Food Science, University of Guelph, Guelph, Ontario, Canada
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10
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Xu W, Xu Q, Zhong M. Lubrication study of representative fluid foods between mimicked oral surfaces. J Texture Stud 2021; 53:96-107. [PMID: 34750817 DOI: 10.1111/jtxs.12645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/27/2021] [Accepted: 11/03/2021] [Indexed: 11/27/2022]
Abstract
The lubricities of glycerol solutions with different viscosities were investigated at various frictional pairs, speeds, and loads to explore the lubrication regulations of diverse foods in mouths of different people. The friction pairs were characterized in terms of mechanical properties, surface morphology, and hydrophobicity. The results showed that the partial or complete Stribeck curves occurred with different speeds and viscosities. Various friction pairs had great influences on the boundary lubrication zone, but little influences on the elastohydrodynamic lubrication (EHL) zone. Increasing loads caused the friction coefficient decreasing in boundary lubrication zone; however, the friction coefficient changed a little in the mixed lubrication and EHL zones.
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Affiliation(s)
- Wenhu Xu
- School of Mechatronics Engineering, Key Laboratory of Tribology, Nanchang University, Nanchang, China
| | - Qixiang Xu
- School of Mechatronics Engineering, Key Laboratory of Tribology, Nanchang University, Nanchang, China
| | - Min Zhong
- School of Mechatronics Engineering, Key Laboratory of Tribology, Nanchang University, Nanchang, China
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11
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Wang S, Olarte Mantilla SM, Smith PA, Stokes JR, Smyth HE. Tribology and QCM-D approaches provide mechanistic insights into red wine mouthfeel, astringency sub-qualities and the role of saliva. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Brown FN, Mackie AR, He Q, Branch A, Sarkar A. Protein-saliva interactions: a systematic review. Food Funct 2021; 12:3324-3351. [PMID: 33900320 DOI: 10.1039/d0fo03180a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Food industries are challenged to reformulate foods and beverages with higher protein contents to lower fat and sugar content. However, increasing protein concentration can reduce sensory acceptability due to astringency perception. Since the properties of food-saliva mixtures govern mouthfeel perception, understanding how saliva and protein interact is key to guide development of future protein-rich reformulations with optimal sensory attributes. Hence, this systematic review investigated protein-saliva interaction using both model and real human saliva, including a quality assessment. A literature search of five databases (Medline, Pubmed, Embase, Scopus and Web of Science) was undertaken covering the last 20 years, yielding 36 604 articles. Using pre-defined criteria, this was reduced to a set of 33 articles with bulk protein solutions (n = 17), protein-stabilized emulsions (n = 13) and protein-rich food systems (n = 4). Interaction of dairy proteins, lysozyme and gelatine with model or human saliva dominated the literature. The pH was shown to have a strong effect on electrostatic interaction of proteins with negatively-charged salivary mucins, with greater interactions occurring below the isoelectric point of proteins. The effect of protein concentration was unclear due to the limited range of concentrations being studied. Most studies employed a 1 : 1 w/w protein : saliva ratio, which is not representative of true oral conditions. The interaction between protein and saliva appears to affect mouthfeel through aggregation and increased friction. The searches identified a gap in research on plant proteins. Accurate simulation of in vivo oral conditions should clarify understanding of protein-saliva interaction and its influence on sensory perception.
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Affiliation(s)
- Frances N Brown
- Food Colloids and Bioprocessing Group, School of Food Science and Nutrition, University of Leeds, Leeds, UK.
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13
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Comparing temporal sensory product profile data obtained from expert and consumer panels and evaluating the value of a multiple sip TCATA approach. Food Qual Prefer 2021. [DOI: 10.1016/j.foodqual.2020.104141] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Fan N, Shewan HM, Smyth HE, Yakubov GE, Stokes JR. Dynamic Tribology Protocol (DTP): Response of salivary pellicle to dairy protein interactions validated against sensory perception. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106478] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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15
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Norton V, Lignou S, Methven L. Whey Protein Derived Mouthdrying Found to Relate Directly to Retention Post Consumption but Not to Induced Differences in Salivary Flow Rate. Foods 2021; 10:587. [PMID: 33799574 PMCID: PMC8000321 DOI: 10.3390/foods10030587] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/04/2021] [Accepted: 03/08/2021] [Indexed: 12/17/2022] Open
Abstract
Whey protein is fortified into beverages to provide functional benefits, however, these beverages are considered mouthdrying. To date whey protein derived mouthdrying has not been quantified using a 'physical measure' in parallel with rated perception. Saliva flow could also relate to whey protein derived mouthdrying, however this has not been previously tested as an intervention. Accordingly, volunteers (n = 40) tested mouthdrying in different whey beverages and the sensory profile was evaluated by a trained sensory panel (n = 10). Volunteers also rated mouthdrying combined with collection of saliva samples post beverage consumption to measure retention to the oral cavity. To modulate saliva flow rate, volunteers both chewed on parafilm (to increase saliva flow) and used cotton wool (to remove saliva) before tasting beverages and rating mouthdrying. Both the volunteers and sensory panel rated whey protein beverages (WPB) as significantly more mouthdrying than the control beverage (whey permeate). The significantly higher rating of mouthdrying from the volunteers coincided with significantly higher protein concentration in saliva samples post WPB consumption, supporting mucoadhesion as the mechanism. Modulating saliva flow did not lead to any difference in rated mouthdrying and future work would be beneficial to evaluate further the influence of natural variation in salivary flow rate.
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Affiliation(s)
| | | | - Lisa Methven
- Department of Food and Nutritional Sciences, Harry Nursten Building, University of Reading, Whiteknights, Reading RG6 6DZ, UK; (V.N.); (S.L.)
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16
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Norton V, Lignou S, Methven L. Influence of Age and Individual Differences on Mouthfeel Perception of Whey Protein-Fortified Products: A Review. Foods 2021; 10:433. [PMID: 33669435 PMCID: PMC7920461 DOI: 10.3390/foods10020433] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 12/22/2022] Open
Abstract
Protein needs are considered to increase with age, with protein consumption being associated with many positive outcomes. Protein-fortified products are often used to improve nutritional status and prevent age-related muscle mass loss in older adults. Accordingly, older adults are commonly provided with products fortified with whey protein; however, such products can cause mouthdrying, limiting consumption and product enjoyment. Currently, the extent to which age and individual differences (e.g., saliva, oral health, food oral processing) influence the perception of whey protein-derived mouthdrying is relatively unclear. Previous research in this area has mainly focused on investigating mouthdrying, without taking into account individual differences that could influence this perception within the target population. Therefore, the main focus of this review is to provide an overview of the relevant individual differences likely to influence mouthfeel perception (specifically mouthdrying) from whey protein-fortified products, thereby enabling the future design of such products to incorporate better the needs of older adults and improve their nutritional status. This review concludes that age and individual differences are likely to influence mouthdrying sensations from whey protein-fortified products. Future research should focus more on the target population and individual differences to maximise the benefits from whey protein fortification.
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Affiliation(s)
| | | | - Lisa Methven
- Department of Food and Nutritional Sciences, Harry Nursten Building, University of Reading, Whiteknights, Reading RG6 6DZ, UK; (V.N.); (S.L.)
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17
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Norton V, Lignou S, Bull SP, Gosney MA, Methven L. An Investigation of the Influence of Age and Saliva Flow on the Oral Retention of Whey Protein and Its Potential Effect on the Perception and Acceptance of Whey Protein Beverages. Nutrients 2020; 12:E2506. [PMID: 32825104 PMCID: PMC7551043 DOI: 10.3390/nu12092506] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/07/2020] [Accepted: 08/17/2020] [Indexed: 12/24/2022] Open
Abstract
Protein fortified products are regularly recommended to older adults to improve nutritional status and limit sarcopenia. However protein fortification can elicit negative sensory attributes such as mouthdrying. Sensitivity to mouthdrying can increase with age, yet the influence of saliva flow and mucoadhesion remain uncertain. Here, two studies tested different whey protein beverages (WPB); 22 healthy younger volunteers completed a pilot and 84 healthy volunteers from two age groups (18-30; 65+) completed the main study. In both studies salivary flow rates (mL/min) were measured and saliva samples were collected at time intervals post beverage consumption to measure mucoadhesion to the oral cavity, where protein concentration was analysed by Bradford Assay. Volunteers rated perception and acceptability of WPBs in the main study. WPB consumption resulted in significantly increased protein concentration (p < 0.0001) in saliva samples compared with a control whey permeate beverage. Older adults had significantly lower unstimulated saliva flow (p = 0.003) and significantly increased protein concentration (p = 0.02) in saliva samples, compared with younger adults. Heating of WPB significantly (p < 0.05) increased mouthdrying and thickness perception and reduced sweetness compared with unheated WPB. Mucoadhesion is concluded to be a true phenomenon in WPBs and increases with age.
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Affiliation(s)
- Victoria Norton
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AD, UK; (V.N.); (S.L.); (S.P.B.)
| | - Stella Lignou
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AD, UK; (V.N.); (S.L.); (S.P.B.)
| | - Stephanie P. Bull
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AD, UK; (V.N.); (S.L.); (S.P.B.)
| | - Margot A. Gosney
- Royal Berkshire NHS Foundation Trust, London Road, Reading RG1 5AN, UK;
| | - Lisa Methven
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berkshire RG6 6AD, UK; (V.N.); (S.L.); (S.P.B.)
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18
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Carter BG, Foegeding EA, Drake MA. Invited review: Astringency in whey protein beverages. J Dairy Sci 2020; 103:5793-5804. [PMID: 32448585 DOI: 10.3168/jds.2020-18303] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/05/2020] [Indexed: 01/08/2023]
Abstract
Astringency is the sensation of mouth drying and puckering, and it has also been described as a loss of lubrication in the mouth. Astringency is perceived as an increase in oral friction or roughness. Astringency caused by tannins and other polyphenols has been well documented and studied. Whey proteins are popular for their functional and nutritional quality, but they exhibit astringency, particularly under acidic conditions popular in high acid (pH 3.4) whey protein beverages. Acids cause astringency, but acidic protein beverages have higher astringency than acid alone. Whey proteins are able to interact with salivary proteins, which removes the lubricating saliva layer of the mouth. Whey proteins can also interact directly with epithelial tissue. These various mechanisms of astringency limit whey protein ingredient applications because astringency is undesirable to consumers. A better understanding of the causes of whey protein astringency will improve our ability to produce products that have high consumer liking and deliver excellent nutrition.
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Affiliation(s)
- B G Carter
- Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research Center, North Carolina State University, Raleigh 27695
| | - E A Foegeding
- Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research Center, North Carolina State University, Raleigh 27695
| | - M A Drake
- Department of Food, Bioprocessing and Nutrition Sciences, Southeast Dairy Foods Research Center, North Carolina State University, Raleigh 27695.
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Nishinari K, Ishihara S, Hori K, Fang Y. Tongue-palate squeezing of soft gels in food oral processing. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.02.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Brossard N, Bordeu E, Ibáñez RA, Chen J, Osorio F. Rheological study of tannin and protein interactions based on model systems. J Texture Stud 2020; 51:585-592. [PMID: 32110834 DOI: 10.1111/jtxs.12518] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 02/04/2020] [Accepted: 02/17/2020] [Indexed: 11/28/2022]
Abstract
The interaction between wine tannins and saliva proteins is responsible for wine astringency perception, producing a depletion of salivary proteins and changes on oral friction. In sensorial terms, astringency is described as a dryness and puckering sensation in the mouth, which is related to the "structure" or "body" of red wines. However, these last descriptors, as structure or body, are perceived during wine tasting and commonly related to wine viscosity. To address these differences on sensory response, we hypothesize that tannin-protein interactions could be a key factor involved in the viscosity of red wines/saliva mixtures, just as they are for astringency. We used a rheological method to study the impact of tannin-protein interaction on the viscosity of model wine-saliva systems. Mixtures of model saliva based on mucin and typical astringent compounds, as commercial tannins and gallic acid, were evaluated for their rheological behavior. The viscometric flow of the fluid mixtures was determined, and subsequently, the viscosity was evaluated at a shear rate of 60 s-1 . It was observed that red wines/saliva mixtures exhibit non-Newtonian flow and ascending tannin doses led to an increase in the apparent viscosity. Nephelometric analysis demonstrate that tannin-mucin aggregates were formed, which suggests that these complexes were potentially responsible for the viscosity increases, modifying the rheological behavior of these mixtures. Results from this work propose that tannin-protein interactions are also involved in the underlying mechanism of thickness perception of red wines and rheology could be a complementary instrumental technique for wine mouthfeel characterization.
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Affiliation(s)
- Natalia Brossard
- Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Edmundo Bordeu
- Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo A Ibáñez
- Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago, Chile.,Center for Dairy Research, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Jianshe Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Fernando Osorio
- Department of Food Science and Technology, Universidad de Santiago de Chile, Santiago, Chile
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21
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Sethupathy P, Moses JA, Anandharamakrishnan C. Food Oral Processing and Tribology: Instrumental Approaches and Emerging Applications. FOOD REVIEWS INTERNATIONAL 2020. [DOI: 10.1080/87559129.2019.1710749] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Priyanka Sethupathy
- Computational Modeling and Nanoscale Processing Unit, Indian Institute of Food Processing Technology, Thanjavur, India
| | - Jeyan A. Moses
- Computational Modeling and Nanoscale Processing Unit, Indian Institute of Food Processing Technology, Thanjavur, India
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22
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Zhang Z, Li Y, Lee MC, Ravanfar R, Padilla-Zakour OI, Abbaspourrad A. The Impact of High-Pressure Processing on the Structure and Sensory Properties of Egg White-Whey Protein Mixture at Acidic Conditions. FOOD BIOPROCESS TECH 2020. [DOI: 10.1007/s11947-019-02397-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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23
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Shewan HM, Pradal C, Stokes JR. Tribology and its growing use toward the study of food oral processing and sensory perception. J Texture Stud 2019; 51:7-22. [PMID: 31149733 DOI: 10.1111/jtxs.12452] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/13/2019] [Accepted: 05/23/2019] [Indexed: 01/28/2023]
Abstract
Here we provide a comprehensive review of the knowledge base of soft tribology, the study of friction, lubrication, and wear on deformable surfaces, with consideration for its application toward oral tribology and food lubrication. Studies on "soft-tribology" have emerged to provide knowledge and tools to predict oral behavior and assess the performance of foods and beverages. We have shown that there is a comprehensive set of fundamental literature, mainly based on soft contacts in the Mini-traction machine with rolling ball on disk configuration, which provides a baseline for interpreting tribological data from complex food systems. Tribology-sensory relationships do currently exist. However, they are restricted to the specific formulations and tribological configuration utilized, and cannot usually be applied more broadly. With a careful and rigorous formulation/experimental design, we envisage tribological tools to provide insights into the sensory perception of foods in combination with other in vitro technique such as rheology, particle sizing or characterization of surface interactions. This can only occur with the use of well characterized tribopairs and equipment; a careful characterization of simpler model foods before considering complex food products; the incorporation of saliva in tribological studies; the removal of confounding factors from the sensory study and a global approach that considers all regimes of lubrication.
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Affiliation(s)
- Heather M Shewan
- School of Chemical Engineering, The University of Queensland, Brisbane, Australia
| | - Clementine Pradal
- School of Chemical Engineering, The University of Queensland, Brisbane, Australia
| | - Jason R Stokes
- School of Chemical Engineering, The University of Queensland, Brisbane, Australia
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24
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Çelebioğlu HY, Lee S, Chronakis IS. Interactions of salivary mucins and saliva with food proteins: a review. Crit Rev Food Sci Nutr 2019; 60:64-83. [PMID: 30632771 DOI: 10.1080/10408398.2018.1512950] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mucins are long glycoprotein molecules responsible for the gel nature of the mucous layer that covers epithelial surfaces throughout the body. Mucins, as the major salivary proteins, are also important proteins for the food oral processing and digestion. The interactions of salivary mucins and saliva with several food proteins and food protein emulsions, as well as their functional properties related to the food oral processing were reviewed in this paper. The target food proteins of focus were whey proteins (lactoferrin and beta-lactoglobulin) and non-whey proteins (casein, gelatin, galectin/lectin, and proline-rich proteins). Most of the studies suggest that electrostatic attraction (between positively charged food proteins with negatively charged moieties of mucin mainly on glycosylated region of mucin) is the major mode of interaction between them. On the other hand, casein attracts the salivary proteins only via non-covalent interactions due to its naturally self-assembled micellar structure. Moreover, recent studies related to β-lactoglobulin (BLG)-mucin interactions have clarified the importance of hydrophobic as well as hydrophilic interactions, such as hydrogen bonding. Furthermore, in vitro studies between protein emulsions and saliva observed a strong aggregating effect of saliva on caseinate and whey proteins as well as on surfactant-stabilized emulsions. Besides, the sign and the density of the charge on the surface of the protein emulsion droplets contribute significantly to the behavior of the emulsion when mixed with saliva. Other studies also suggested that the interactions between saliva and whey proteins depends on the pH in addition to the flow rate of the saliva. Overall, the role of interactions of food proteins and food protein emulsions with mucin/saliva-proteins in the oral perception, as well as the physicochemical and structural changes of proteins were discussed.
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Affiliation(s)
- Hilal Y Çelebioğlu
- Nano-BioScience Research Group, DTU-Food, Technical University of Denmark, Lyngby, Denmark
| | - Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, Lyngby, Denmark
| | - Ioannis S Chronakis
- Nano-BioScience Research Group, DTU-Food, Technical University of Denmark, Lyngby, Denmark
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25
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Madadlou A, Zamani S, Lu Y, Abbaspourrad A. Effect of surfactant addition on particle properties of whey proteins and their subsequent complexation with salivary proteins. Int Dairy J 2018. [DOI: 10.1016/j.idairyj.2018.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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26
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An ex vivo salivary lubrication system to mimic xerostomic conditions and to predict the lubricating properties of xerostomia relieving agents. Sci Rep 2018; 8:9087. [PMID: 29904095 PMCID: PMC6002370 DOI: 10.1038/s41598-018-27380-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 05/25/2018] [Indexed: 12/14/2022] Open
Abstract
Advances in medical research has resulted in successful treatment of many life-threatening infectious diseases as well as autoimmune and lifestyle-related diseases, increasing life-expectancy of both the developed and developing world. As a result of a growing ageing population, the focus has also turned on chronic diseases which seriously affect the quality of older patient life. Xerostomia (dry mouth) is one such condition, which leads to bad oral health and difficulty in consumption of dry foods and speech. Saliva substitutes are used to ease symptoms. However, they often don’t work properly and objective comparison of saliva substitutes to mimic natural salivary functions does not exist. The study thus aims to develop an ex vivo friction assay simulating dry mouth conditions and facilitating objective comparison of saliva substitutes. A reciprocating sliding tongue-enamel system was developed and compared to a PDMS (polydimethylsiloxane)-PDMS friction system. The tongue-enamel system, but not the PDMS-PDMS model, showed high mucin-containing saliva (unstimulated and submandibular/sublingual saliva) to give higher Relief than mucin-poor lubricants (water, parotid saliva, Dentaid Xeros) and correlated well (r = 0.97) with in vivo mouth feel. The tongue-enamel friction system mimicked dry mouth conditions and relief and seems suited to test agents meant to lubricate desiccated oral surfaces.
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27
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Campbell CL, Foegeding EA, van de Velde F. A comparison of the lubrication behavior of whey protein model foods using tribology in linear and elliptical movement. J Texture Stud 2017; 48:335-341. [PMID: 28556911 DOI: 10.1111/jtxs.12278] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/18/2017] [Accepted: 05/19/2017] [Indexed: 11/30/2022]
Abstract
Lubrication is an important factor in the sensory evaluation of food products. Tribology provides a theoretical framework and instrumental methods for evaluating frictional properties between two moving surfaces and the lubrication behavior of products between these surfaces. Relating frictional measurements to sensory properties detected during oral processing requires careful and pertinent choices in surface materials and testing conditions. The aims of this study were to investigate: (a) differences in lubrication behavior of a range of food textures and (b) the differences between linear and elliptical movement and added saliva to understand the contribution of food structure to friction. Six whey protein model food samples, ranging in texture from fluid to semisolid to soft solid, were analyzed using a pin on disk tribometer to determine the coefficient of friction (COF) across a range of sliding speeds. The samples were analyzed in their initial form and post-oral processing (n = 4) in both linear and elliptical movements. Elliptical movement slightly decreased coefficients of friction and extended the shape of the friction curve. Increases in test food viscosity decreased the COF but differences in viscosity were not apparent when test foods were mixed with saliva. Data correction for viscosity shifted the friction curves horizontally, indicating that lubrication had a greater impact upon friction than viscosity. This study provides initial insights for further comparison of linear and elliptical movement with a variety of sample compositions. PRACTICAL APPLICATIONS Sensory perception of smoothness and creaminess are often major contributors to overall hedonic food liking and are a major reason why products high in fat and sugar are more highly preferred over other foods. These parameters are influenced by friction and lubrication between the tongue, palate, teeth, food products, and saliva during oral processing. Tribology provides an instrumental method to evaluate friction between moving surfaces that mimic oral surfaces and the lubrication behavior of foods. Trends in frictional measurements can be correlated with sensory ratings of the same foods to better understand why preferences exist for certain foods or food compositions and how to effectively improve the acceptability and enjoyment of healthier foods.
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Affiliation(s)
- Caroline L Campbell
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina
| | - E Allen Foegeding
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina
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29
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Bull SP, Hong Y, Khutoryanskiy VV, Parker JK, Faka M, Methven L. Whey protein mouth drying influenced by thermal denaturation. Food Qual Prefer 2017; 56:233-240. [PMID: 28260840 PMCID: PMC5310118 DOI: 10.1016/j.foodqual.2016.03.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Whey proteins are becoming an increasingly popular functional food ingredient. There are, however, sensory properties associated with whey protein beverages that may hinder the consumption of quantities sufficient to gain the desired nutritional benefits. One such property is mouth drying. The influence of protein structure on the mouthfeel properties of milk proteins has been previously reported. This paper investigates the effect of thermal denaturation of whey proteins on physicochemical properties (viscosity, particle size, zeta-potential, pH), and relates this to the observed sensory properties measured by qualitative descriptive analysis and sequential profiling. Mouthcoating, drying and chalky attributes built up over repeated consumption, with higher intensities for samples subjected to longer heating times (p < 0.05). Viscosity, pH, and zeta-potential were found to be similar for all samples, however particle size increased with longer heating times. As the pH of all samples was close to neutral, this implies that neither the precipitation of whey proteins at low pH, nor their acidity, as reported in previous literature, can be the drying mechanisms in this case. The increase in mouth drying with increased heating time suggests that protein denaturation is a contributing factor and a possible mucoadhesive mechanism is discussed.
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Affiliation(s)
- Stephanie P. Bull
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berks RG6 6AD, United Kingdom
| | - Yuchun Hong
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berks RG6 6AD, United Kingdom
| | - Vitaliy V. Khutoryanskiy
- Department of Pharmacy, University of Reading, Whiteknights, Reading, Berks RG6 6AD, United Kingdom
| | - Jane K. Parker
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berks RG6 6AD, United Kingdom
| | - Marianthi Faka
- Volac International Ltd, 50 Fishers Lane, Orwell, Royston, Hertfordshire SG8 5QX, United Kingdom
| | - Lisa Methven
- Department of Food and Nutritional Sciences, University of Reading, Whiteknights, Reading, Berks RG6 6AD, United Kingdom
- Corresponding author.
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30
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Morell P, Chen J, Fiszman S. The role of starch and saliva in tribology studies and the sensory perception of protein-added yogurts. Food Funct 2017; 8:545-553. [DOI: 10.1039/c6fo00259e] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Increasing the protein content of yogurts would be a good strategy for enhancing their satiating ability.
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Affiliation(s)
- Pere Morell
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC)
- Paterna
- Spain
| | - Jianshe Chen
- School of Food Science and Biotechnology
- Zhejiang Gongshang University
- Hangzhou
- China
| | - Susana Fiszman
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC)
- Paterna
- Spain
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31
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Influence of centrifugation treatment on the lubricating properties of human whole saliva. BIOSURFACE AND BIOTRIBOLOGY 2016. [DOI: 10.1016/j.bsbt.2016.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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32
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Pradal C, Stokes JR. Oral tribology: bridging the gap between physical measurements and sensory experience. Curr Opin Food Sci 2016. [DOI: 10.1016/j.cofs.2016.04.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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33
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Biegler M, Delius J, Käsdorf BT, Hofmann T, Lieleg O. Cationic astringents alter the tribological and rheological properties of human saliva and salivary mucin solutions. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.biotri.2016.03.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Brossard N, Cai H, Osorio F, Bordeu E, Chen J. “Oral” Tribological Study on the Astringency Sensation of Red Wines. J Texture Stud 2016. [DOI: 10.1111/jtxs.12184] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Natalia Brossard
- School of Food Science and Biotechnology; Zhejiang Gongshang University; Hangzhou 310018 P.R. China
- Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile; Chile
| | - Huifang Cai
- School of Food Science and Biotechnology; Zhejiang Gongshang University; Hangzhou 310018 P.R. China
| | - Fernando Osorio
- Department of Food Science and Technology; Universidad de Santiago de Chile; Chile
| | - Edmundo Bordeu
- Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile; Chile
| | - Jianshe Chen
- School of Food Science and Biotechnology; Zhejiang Gongshang University; Hangzhou 310018 P.R. China
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35
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Çelebioğlu HY, Gudjónsdóttir M, Chronakis IS, Lee S. Investigation of the interaction between mucins and β-lactoglobulin under tribological stress. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.09.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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36
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Genovese A, Caporaso N, De Luca L, Paduano A, Sacchi R. Influence of olive oil phenolic compounds on headspace aroma release by interaction with whey proteins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:3838-3850. [PMID: 25832115 DOI: 10.1021/acs.jafc.5b00148] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The release of volatile compounds in an oil-in-water model system obtained from olive oil-whey protein (WP) pairing was investigated by considering the effect of phenolic compounds. Human saliva was used to simulate mouth conditions by retronasal aroma simulator (RAS) analysis. Twelve aroma compounds were quantified in the dynamic headspace by SPME-GC/MS. The results showed significant influences of saliva on the aroma release of virgin olive oil (VOO) volatiles also in the presence of WP. The interaction between WP and saliva leads to lower headspace release of ethyl esters and hexanal. Salivary components caused lower decrease of the release of acetates and alcohols. A lower release of volatile compounds was found in the RAS essay in comparison to that in orthonasal simulation of only refined olive oil (without addition of saliva or WP), with the exception of hexanal and 1-penten-3-one, where a significantly higher release was found. Our results suggest that the extent of retronasal odor (green, pungent) of these two volatile compounds is higher than orthonasal odor. An extra VOO was used to verify the release in model systems, indicating that WP affected aroma release more than model systems, while saliva seems to exert an opposite trend. A significant increase in aroma release was found when phenolic compounds were added to the system, probably due to the contrasting effects of binding of volatile compounds caused by WP, for the polyphenol-protein interaction phenomenon. Our study could be applied to the formulation of new functional foods to enhance flavor release and modulate the presence and concentrations of phenolics and whey proteins in food emulsions/dispersions.
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Affiliation(s)
- Alessandro Genovese
- Department of Agriculture, University of Naples Federico II, Via Università 100, 80055 Portici (NA), Italy
| | - Nicola Caporaso
- Department of Agriculture, University of Naples Federico II, Via Università 100, 80055 Portici (NA), Italy
| | - Lucia De Luca
- Department of Agriculture, University of Naples Federico II, Via Università 100, 80055 Portici (NA), Italy
| | - Antonello Paduano
- Department of Agriculture, University of Naples Federico II, Via Università 100, 80055 Portici (NA), Italy
| | - Raffaele Sacchi
- Department of Agriculture, University of Naples Federico II, Via Università 100, 80055 Portici (NA), Italy
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37
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38
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Joyner (Melito) HS, Pernell CW, Daubert CR. Beyond surface selection: The impact of different methodologies on tribological measurements. J FOOD ENG 2014. [DOI: 10.1016/j.jfoodeng.2014.03.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Joyner Melito HS, Pernell CW, Daubert CR. Impact of Formulation and Saliva on Acid Milk Gel Friction Behavior. J Food Sci 2014; 79:E867-80. [DOI: 10.1111/1750-3841.12439] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 02/15/2014] [Indexed: 11/29/2022]
Affiliation(s)
| | - Chris W. Pernell
- Dept. of Food, Bioprocessing; and Nutrition Sciences; North Carolina State Univ; Raleigh NC U.S.A
| | - Christopher R. Daubert
- Dept. of Food, Bioprocessing; and Nutrition Sciences; North Carolina State Univ; Raleigh NC U.S.A
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40
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Selway N, Stokes JR. Soft Materials Deformation, Flow, and Lubrication Between Compliant Substrates: Impact on Flow Behavior, Mouthfeel, Stability, and Flavor. Annu Rev Food Sci Technol 2014; 5:373-93. [DOI: 10.1146/annurev-food-030212-182657] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Jason R. Stokes
- School of Chemical Engineering and
- the ARC Center of Excellence in Plant Cell Walls, The University of Queensland, Brisbane, QLD 4072, Australia;
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41
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Insights into the dynamics of oral lubrication and mouthfeel using soft tribology: Differentiating semi-fluid foods with similar rheology. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.07.044] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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42
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Bohin MC, Roland WSU, Gruppen H, Gouka RJ, van der Hijden HTWM, Dekker P, Smit G, Vincken JP. Evaluation of the bitter-masking potential of food proteins for EGCG by a cell-based human bitter taste receptor assay and binding studies. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:10010-10017. [PMID: 24093533 DOI: 10.1021/jf4030823] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Epigallocatechin gallate (EGCG) has been ascribed to several health benefits, but its bitter taste influences the liking of products with high concentrations of this compound. β-Casein, in particular, and several gelatins are known as strong binders of EGCG, contrary to β-lactoglobulin. The current study aimed at relating the EGCG-binding characteristics of those proteins and their food-grade equivalents to their effects on reducing bitter receptor activation by EGCG in vitro and their bitter-masking potential in vivo. Also in the bitter receptor assay, β-casein showed the strongest effect, with a maximum reduction of hTAS2R39 activation of about 93%. A similar potency was observed for Na-caseinate. β-Lactoglobulin had little effect on bitter receptor activation, as expected based on its low binding affinity for EGCG. The bitter-masking potential of Na-caseinate was confirmed in vivo using a trained sensory panel. β-Lactoglobulin also slightly reduced EGCG bitter perception, which could not be directly related to its binding capacity. The bitter receptor assay appeared to be a valid tool to evaluate in vitro the efficacy of food proteins as complexing agents for masking bitterness.
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Affiliation(s)
- Maxime C Bohin
- Laboratory of Food Chemistry, Wageningen University , Bornse Weilanden 9, 6708, Wageningen, The Netherlands
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43
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Stokes JR, Boehm MW, Baier SK. Oral processing, texture and mouthfeel: From rheology to tribology and beyond. Curr Opin Colloid Interface Sci 2013. [DOI: 10.1016/j.cocis.2013.04.010] [Citation(s) in RCA: 249] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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44
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Carvalho-da-Silva AM, Van Damme I, Taylor W, Hort J, Wolf B. Oral processing of two milk chocolate samples. Food Funct 2013; 4:461-9. [DOI: 10.1039/c2fo30173c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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45
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Bandyopadhyay P, Ghosh AK, Ghosh C. Recent developments on polyphenol–protein interactions: effects on tea and coffee taste, antioxidant properties and the digestive system. Food Funct 2012; 3:592-605. [PMID: 22465955 DOI: 10.1039/c2fo00006g] [Citation(s) in RCA: 236] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Tea and coffee are widely consumed beverages across the world and they are rich sources of various polyphenols. Polyphenols are responsible for the bitterness and astringency of beverages and are also well known to impart antioxidant properties which is beneficial against several oxidative stress related diseases like cancer, cardiovascular diseases, and aging. On the other hand, proteins are also known to display many important roles in several physiological activities. Polyphenols can interact with proteins through hydrophobic or hydrophilic interactions, leading to the formation of soluble or insoluble complexes. According to recent studies, this complex formation can affect the bioavailability and beneficiary properties of both the individual components, in either way. For example, polyphenol-protein complex formation can reduce or enhance the antioxidant activity of polyphenols; similarly it can also affect the digestion ability of several digestive enzymes present in our body. Surprisingly, no review article has been published recently which has focused on the progress in this area, despite numerous articles having appeared in this field. This review summarizes the recent trends and patterns (2005 onwards) in polyphenol-protein interaction studies focusing on the characterization of the complex, the effect of this complex formation on tea and coffee taste, antioxidant properties and the digestive system.
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Abstract
Understanding astringency has focused on the interaction of tannins with the salivary proline-rich proteins (PRPs), although it remains unclear if other astringents precipitate the PRPs or how this interaction relates to sensory perceptions of astringency. We used 2 approaches to compare how distinct classes of astringent compounds interacted with the salivary PRPs and mucins. Using sodium dodecyl sulfate polyacrylamide gel electrophoresis, we evaluated protein patterns and characterized the salivary proteins present in the supernatants and pellets of pooled saliva assayed with tannin, alum, and hydrochloric acid solutions. Tannins and alum precipitated many of the PRPs, but acid did not. Mucins were precipitated by both the acid and alum, but not by the tannins. From our research, it appears that the precipitation of salivary proteins may be involved in the mechanism of astringency, but the precipitation of PRPs is not requisite for the development of astringency. We also measured mucin and deoxyribonucleic acid content of expectorated solutions of astringents that panelists swished in their mouths to determine if astringency was associated with a loss of oral lubricating films.
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Affiliation(s)
- Catherine A Lee
- Department of Food Science and Nutrition, College of Food, Agricultural and Natural Resources, University of Minnesota, St. Paul, MN 55108, USA
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