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Singh RP. Progress and challenges in designing dynamic in vitro gastric models to study food digestion. Front Nutr 2024; 11:1399534. [PMID: 38903619 PMCID: PMC11188385 DOI: 10.3389/fnut.2024.1399534] [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: 03/14/2024] [Accepted: 05/13/2024] [Indexed: 06/22/2024] Open
Abstract
Understanding the mechanisms involved in food breakdown in the human gastrointestinal (GI) tract is essential in food digestion research. Research to study food digestion in the human GI tract requires in vivo and in vitro approaches. In vivo methods involving human or animal subjects are often cost-prohibitive and raise ethical concerns. For these reasons, in vitro approaches are becoming more common. Several dynamic in vitro models that mimic one or more components of the GI tract have been developed at various research institutions and by commercial companies. While there is evidence of considerable novelty and innovation in the design of these models, there are many differences among them in how the mechanical breakdown of solid foods is accomplished. In some systems, modulating water pressure is used to achieve peristaltic contractions of the gastric antrum, whereas, in other models, the flexible walls of a gastric chamber are compressed by the movement of rollers or clamps outside the walls of the test chamber. Although much progress has been made in standardizing the biochemical environment appropriate to the food digestion process, there is a lack of standard protocols to measure mechanical forces that result in the breakdown of solid foods. Similarly, no standardized methods are available to evaluate the results obtained from in vitro trials for validation purposes. Due to the large variability in the design features of in vitro models used for food digestion studies, developing consensus-based standards for the mechanical aspects of food breakdown is needed.
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Affiliation(s)
- R. Paul Singh
- Distinguished Professor Emeritus of Food Engineering, University of California, Davis, Davis, CA, United States
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2
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Zambrano Y, Bornhorst GM, Bouchon P. Understanding the physical breakdown and catechin bioaccessibility of third generation extruded snacks enriched with catechin using the human gastric simulator. Food Funct 2024; 15:930-952. [PMID: 38170559 DOI: 10.1039/d3fo03857b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The nutritional quality of third-generation snacks prepared from rice flour by extrusion can be improved by the addition of polyphenols such as catechins, which are known to be more stable at high temperatures. However, the extrusion parameters can impact the breakdown and release of bioactive compounds and decrease the catechin bioaccessibility. Accordingly, this study investigated the impact of different extrusion parameters, including different extrusion temperatures (110, 135, and 150 °C) and moisture content prior to extrusion (27 and 31%), on the breakdown and bioaccessibility of catechin-enriched snacks during in vitro dynamic digestion using the Human Gastric Simulator (HGS). The extrusion parameters did not significantly impact most measured variables by themselves, indicating that within the tested ranges, any of the processing conditions could be used to produce a product with similar digestive behavior. However, the interaction of extrusion parameters (temperature and moisture content) played a significant role in the snack behavior during digestion. For example, the combination of 27% moisture content and 150 °C extrusion temperature had higher catechin bioaccessibility and higher starch hydrolysis than the other treatments. Overall, these findings suggest that the processing conditions of third generation snacks enriched with catechin can be optimized within certain ranges with limited modifications in the digestive properties.
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Affiliation(s)
- Yadira Zambrano
- Department of Chemical and Bioprocess Engineering, Faculty of Engineering, Pontificia Universidad Católica de Chile, Macul 6904411, Chile.
| | - Gail M Bornhorst
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA.
| | - Pedro Bouchon
- Department of Chemical and Bioprocess Engineering, Faculty of Engineering, Pontificia Universidad Católica de Chile, Macul 6904411, Chile.
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3
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Sun W, Tribuzi G, Bornhorst GM. Particle size and water content impact breakdown and starch digestibility of chickpea snacks during in vitro gastrointestinal digestion. Food Res Int 2023; 173:113201. [PMID: 37803531 DOI: 10.1016/j.foodres.2023.113201] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 06/19/2023] [Accepted: 06/27/2023] [Indexed: 10/08/2023]
Abstract
Chickpeas are an agriculturally-important legume that are an excellent source of protein, fiber, and minerals. Developing chickpea-based snacks could provide consumers with snack products rich in protein and other nutrients. In this study, chickpea puree (high moisture content) and cracker (low moisture content) were each produced with large (7 mm sieve; coarse) or small (2 mm sieve; fine) particle size to investigate the impact of initial particle size and moisture content on particle breakdown, starch hydrolysis, and protein hydrolysis during in vitro digestion. All treatments underwent static in vitro oral digestion, dynamic gastric digestion in the Human Gastric Simulator (HGS), and static in vitro small intestinal digestion. The emptying rate from the HGS was significantly (p < 0.05) higher for fine puree compared to the other treatments, due to higher saturation ratio and smaller initial particle size. The reducing sugars and free amino groups released (representing starch and protein hydrolysis, respectively) from fine puree were higher than coarse puree, and fine cracker was higher than coarse cracker due to the influence of initial particle size. For example, after 360 min total in vitro digestion, the starch hydrolysis of the fine cracker (48.1 ± 3.2%) was significantly higher than (p < 0.05) the coarse cracker (36.3 ± 5.8%). Overall, crackers had higher protein and starch hydrolysis compared to puree in the liquid phase during digestion. The study showed that both the smaller initial particle size and drying significantly (p < 0.05) increased the particle size reduction during gastric digestion and starch and protein digestibility in chickpea-based snacks.
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Affiliation(s)
- Weiyi Sun
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA
| | - Giustino Tribuzi
- Department of Food Science and Technology, Center for Agricultural Sciences, Federal University of Santa Catarina, Florainópolis, SC, Brazil
| | - Gail M Bornhorst
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA; Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
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4
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Subramanian P, Nadia J, Paul Singh R, Bornhorst GM. Comparison of four digestion protocols on the physical characteristics of gastric digesta from cooked couscous using the Human Gastric Simulator. Food Funct 2023; 14:8229-8247. [PMID: 37674386 DOI: 10.1039/d3fo01920a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
In vitro digestion is widely employed in food, nutraceutical and pharmaceutical research, and numerous in vitro gastric digestion protocols have been proposed, with a wide range of experimental conditions. Differences in the simulated gastric fluids (pH, mineral content, enzyme type and enzyme activity) of different digestion protocols may alter the results for the digestion of the same meal. This study aimed to investigate how variations in the gastric secretion rate and composition in four in vitro digestion protocols (Infogest Riddet, Infogest Semi-dynamic, UC Davis and United States Pharmacopeia) impacted the physical properties of the emptied gastric digesta. Cooked couscous was used as a model meal and subjected to simulated gastric digestion using a dynamic gastric model, the Human Gastric Simulator (HGS). The digesta were collected from the outlet of the HGS after 15, 30, 60, 90, 120, 150, or 180 min. The gastric emptying of dry matter, pH, rheological properties, and particle size were evaluated. The digestion protocol significantly influenced the solid content and moisture content of the digesta (p < 0.001), particles per gram of dry matter (p < 0.0001), gastric emptying of dry matter (p < 0.003), shear stress at 0.45 s-1 and consistency coefficient (p < 0.0001). The presence of NaHCO3 in the Infogest Riddet and Infogest Semi-dynamic gastric secretions provided an additional buffering effect and increased the digesta pH during gastric digestion. Similarly, the inclusion of mucin in the UC Davis protocol resulted in a higher flow and viscoelastic properties of the emptied digesta. The highest dilution of gastric content in the United States Pharmacopeia (USP) protocol resulted in larger particles emptied from the HGS and the longest gastric emptying half-time of all digestion protocols. These findings provide new insights into the impact of digestion protocols on the digesta properties, which can be beneficial for the design and standardization of in vitro digestion models.
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Affiliation(s)
| | - Joanna Nadia
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
| | - R Paul Singh
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA.
| | - Gail M Bornhorst
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA.
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5
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Swackhamer C, Bedane T, Keppler S, Poltorak A, Cheung K, Awais N, Marra F, Bornhorst GM. Development and analysis of a multi-module peristaltic simulator for gastrointestinal research. Food Res Int 2023; 170:112877. [PMID: 37316038 DOI: 10.1016/j.foodres.2023.112877] [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: 12/15/2022] [Revised: 03/06/2023] [Accepted: 04/20/2023] [Indexed: 06/16/2023]
Abstract
Many existing in vitro digestion systems do not accurately represent the peristaltic contractions of the gastrointestinal system; most of the systems that have physiologically-relevant peristaltic contractions have low throughput and can only test one sample at a time. A device has been developed that provides simulated peristaltic contractions for up to 12 digestion modules simultaneously using rollers of varying width to modulate the dynamics of the peristaltic motion. The force applied to a simulated food bolus varied from 2.61 ± 0.03 N to 4.51 ± 0.16 N (p < 0.05) depending on roller width. Video analysis showed that the degree of occlusion of the digestion module varied from 72.1 ± 0.4% to 84.6 ± 1.2% (p < 0.05). A multiphysics, computational fluid dynamics model was created to understand the fluid flow. The fluid flow was also examined experimentally using video analysis of tracer particles. The model-predicted maximum fluid velocity in the peristaltic simulator incorporating the thin rollers was 0.016 m/s, and the corresponding value measured using tracer particles was 0.015 m/s. The occlusion, pressure, and fluid velocity in the new peristaltic simulator fell within physiologically representative ranges. Although no in vitro device perfectly recreates the conditions of the gastrointestinal system, this novel device is a flexible platform for future gastrointestinal research and could allow for high-throughput screening of food materials for health-promoting properties under conditions representative of human gastrointestinal motility.
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Affiliation(s)
- Clay Swackhamer
- Department of Biological and Agricultural Engineering, University of California, Davis, USA
| | - Tesfaye Bedane
- UCD School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - Silvia Keppler
- Department of Biological and Agricultural Engineering, University of California, Davis, USA
| | - Adam Poltorak
- Department of Biological and Agricultural Engineering, University of California, Davis, USA
| | - Kyle Cheung
- Department of Biological and Agricultural Engineering, University of California, Davis, USA
| | - Nashea Awais
- Department of Biological and Agricultural Engineering, University of California, Davis, USA
| | - Francesco Marra
- Dipartimento di Ingegneria Industriale, Università degli Studi di Salerno, 84084 Fisciano, Italy
| | - Gail M Bornhorst
- Department of Biological and Agricultural Engineering, University of California, Davis, USA; Riddet Institute, Palmerston North, New Zealand.
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Jian F, Zhang Z, Li D, Luo F, Wu Q, Lu F, Dai Z, Nie M, Xu Y, Feng L, Gu Q. Evaluation of the digestibility and antioxidant activity of protein and lipid after mixing nuts based on in vitro and in vivo models. Food Chem 2023; 414:135706. [PMID: 36821922 DOI: 10.1016/j.foodchem.2023.135706] [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: 09/02/2022] [Revised: 01/30/2023] [Accepted: 02/13/2023] [Indexed: 02/20/2023]
Abstract
This study aimed to evaluate the change of digestibility and antioxidant activity of protein and lipid after mixing walnuts, cashews, and pistachios using in vitro and in vivo models. The results showed that mixed nuts significantly reduced the digested particle size and the degree of hydrolysis of protein and triacylglycerol compared to single nuts in vitro. As a consequence of co-digestion, bioaccessibility and antioxidant activity for amino acids and fatty acids were increased by 1.12-1.87 fold and 1.62-3.81 fold, respectively. In vivo studies, the mixed nuts diet increased the concentration of amino acids and fatty acids in the small intestine by 27.69%-158.26% and 18.13%-152.09%, respectively, and enhanced levels of antioxidant enzymes in the liver and serum, all without causing weight gain. These findings highlight the positive interaction between single and mixed nuts, where mixed nuts enhanced the digestibility and antioxidant activity of single nuts both in vitro and in vivo.
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Affiliation(s)
- Fangfang Jian
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhongyuan Zhang
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China; Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Nanjing 210014, China.
| | - Dajing Li
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Fangjian Luo
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Qihui Wu
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Fengqin Lu
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhuqing Dai
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Meimei Nie
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yayuan Xu
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Lei Feng
- Institute of Agro-product Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Qianhui Gu
- Three Squirrels Co., Ltd, Wuhu 241001, China
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Nadia J, Singh H, Bornhorst GM. Evaluation of the performance of the human gastric simulator using durum wheat-based foods of contrasting food structure. Food Funct 2023. [PMID: 37427445 DOI: 10.1039/d3fo00740e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
The selection of gastric digestion parameters in food digestion studies using in vitro models is critical to properly represent structural changes in the stomach. This study aimed to evaluate the performance of digestion in the human gastric simulator (HGS) using generalized in vitro gastric digestion parameters (secretion rate of 4.1 mL min-1, gastric emptying rate of 5.68 g min-1) that were derived from a previous in vivo study using six starch-rich foods. Two of the six foods used in the in vivo study (cooked durum wheat porridge/semolina and pasta) were digested in the HGS for up to 240 min, then the properties of the emptied and remaining digesta were measured. The properties of the in vitro remaining digesta were compared to those measured in vivo (growing pig stomach). The trends in the gastric breakdown rate and mechanisms, dry matter emptying kinetics, and starch hydrolysis of pasta and semolina were similar to those of in vivo. Gastric breakdown and dilution kinetics in vitro and in vivo were well-related but did not have a 1 : 1 correlation, whereas gastric acidification kinetics in the HGS deviated from that observed in vivo. The results suggest that generalized digestion parameters could be used to predict the effect of food structure on in vivo gastric breakdown and emptying, but care should be taken in interpretation of results, as the gastric acidification process was different from what was observed in vivo. This information will help refine in vitro digestion model parameters to provide more physiologically-relevant data in future studies.
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Affiliation(s)
- Joanna Nadia
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
| | - Harjinder Singh
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
| | - Gail M Bornhorst
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North, New Zealand.
- Department of Biological and Agricultural Engineering, University of California, Davis, CA 95618, USA
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Nikodijevic CJ, Probst YC, Tan SY, Neale EP. The Metabolizable Energy and Lipid Bioaccessibility of Tree Nuts and Peanuts: A Systematic Review with Narrative Synthesis of Human and In Vitro Studies. Adv Nutr 2023; 14:796-818. [PMID: 36934832 PMCID: PMC10334117 DOI: 10.1016/j.advnut.2023.03.006] [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: 04/11/2022] [Revised: 10/31/2022] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Nuts are an energy-dense food, yet regular consumption is not associated with weight gain. A proportion of the fats found within nuts remains encapsulated within cell walls and cannot be digested. Metabolizable energy (ME) can be explored by measuring fecal fat excretion in human studies and fat release among in vitro studies. This systematic review with narrative synthesis aimed to examine the ME of tree nuts and peanuts (PROSPERO CRD42021252287). PubMed, MEDLINE, CINAHL, Cochrane, and Embase databases were searched to June 2021. Both in vitro and human studies (adults ≥18 y) were included. Data was synthesized via narrative synthesis with results reported in summary tables and compared between form, processing, and dose of nuts, where available. Twenty-one studies were included. The ME of nuts was consistently lower than that predicted by Atwater factors for investigated nut types (almonds, cashews, hazelnuts, pistachios, walnuts, and peanuts). The mechanisms may relate to a lower fat release from nuts, hence higher fecal fat excretion; however, this review did not consider the digestibility of carbohydrates and protein, which should be considered when interpreting the outcomes. ME was influenced by nut type (ME = 22.6 kJ/g for pistachios; ME = 18.5 kJ/g for raw almonds), physical form (flour > chopped > whole nuts), heat processing (butter > roasted > raw) and dose of consumption. The lower-than-expected ME may explain a lack of association between nut intake and body weight observed in the literature and has implications for the development of food composition databases, food labeling, and informing dietary guidelines. However, the strength of the evidence base was reduced by the variation in methods used between studies, suggesting that further clinical trials are needed to determine the impact of the findings of this review for clinical dietetics.
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Affiliation(s)
- Cassandra J Nikodijevic
- School of Medical, Indigenous and Health Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales, Australia.
| | - Yasmine C Probst
- School of Medical, Indigenous and Health Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales, Australia
| | - Sze-Yen Tan
- School of Exercise and Nutrition Sciences, Institute for Physical Activity and Nutrition (IPAN), Deakin University, Geelong, Victoria, Australia
| | - Elizabeth P Neale
- School of Medical, Indigenous and Health Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra Health and Medical Research Institute (IHMRI), University of Wollongong, Wollongong, New South Wales, Australia
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Catelli Rocha Torres L, Giovanini de Oliveira Sartori A, Paula de Souza Silva A, Matias de Alencar S. Bioaccessibility and uptake/epithelial transport of vitamin E: discoveries and challenges of in vitro and ex vivo assays. Food Res Int 2022; 162:112143. [DOI: 10.1016/j.foodres.2022.112143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 11/01/2022] [Accepted: 11/15/2022] [Indexed: 11/21/2022]
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10
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Li CH, Shelp G, Wright A. Influence of Nut Structure and Processing on Lipid Bioaccessibility and Absorption. Curr Opin Food Sci 2022. [DOI: 10.1016/j.cofs.2022.100966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tang Y, Park H, Scher HB, Jeoh T. The role of a moisture-barrier latex in controlling retention, stability and release of D-limonene from complex coacervated matrix microparticles formed during spray drying. Front Nutr 2022; 9:979656. [PMID: 36091256 PMCID: PMC9452785 DOI: 10.3389/fnut.2022.979656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
Limonene from citrus peel oil is valued as fragrance and flavor additives in food and beverages; however, D-limonene is highly volatile and oxygen-sensitive, thus present storage and stability challenges in food products. A novel, industrially-scalable microencapsulation by in situ complex coacervation during spray drying process (CoCo process) was applied to encapsulate limonene in alginate-gelatin matrix microparticles. Specifically, we investigated the potential to improve upon prior work demonstrating volatile retention and enteric release of limonene from the complex coacervated (CoCo) microcapsules by incorporating ethylcellulose to improve moisture and oxygen barrier properties of the encapsulation matrix. We hypothesized that ethylcellulose, commonly used as a water-barrier coating with pharmaceuticals, would enhance the ability of CoCo microcapsules to retain and shelf-stabilize limonene. The CoCo process alone could achieve limonene retention of 77.7% ± 1.3% during spray drying, with only ∼10% limonene loss and low oxidation rate after 3-weeks of storage in ambient conditions. Contrary to expectations, incorporating ethylcellulose with the CoCo formulation increased volatile losses of limonene during spray drying and during prolonged storage. Moreover, CoCo powders with ethylcellulose accelerated limonene release in water and simulated gastric fluid, and decelerated release in simulated intestinal fluid—a result that was contrary to targeting enteric release. Instead of simply forming a protective water barrier film in the microparticles during spray drying as envisioned, ethylcellulose appeared to bring limonene to the particle surfaces, thereby enhancing volatile losses, facilitating oxidation and accelerating release in acidic aqueous media. Using ethylcellulose as a model, this study demonstrated the potential to formulate CoCo microparticles using latex excipients to control burst release of the payload followed by long-lasting sustained release in air and in aqueous environments.
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Nadia J, Bronlund JE, Singh H, Singh RP, Bornhorst GM. Contribution of the proximal and distal gastric phases to the breakdown of cooked starch-rich solid foods during static in vitro gastric digestion. Food Res Int 2022; 157:111270. [DOI: 10.1016/j.foodres.2022.111270] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/15/2022] [Accepted: 04/17/2022] [Indexed: 02/07/2023]
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Zhang Y, Hou L, Wang X. Nutrient release and antioxidant properties of functional sesame paste formulated with flaxseed during in vitro digestion. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yujin Zhang
- College of Food Science and Technology Henan University of Technology Zhengzhou 450001 P.R. China
| | - Lixia Hou
- College of Food Science and Technology Henan University of Technology Zhengzhou 450001 P.R. China
| | - Xuede Wang
- College of Food Science and Technology Henan University of Technology Zhengzhou 450001 P.R. China
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14
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Development and characterization of standardized model, solid foods with varying breakdown rates during gastric digestion. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2021.110827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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End-to-end prediction of uniaxial compression profiles of apples during in vitro digestion using time-series micro-computed tomography and deep learning. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.111014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Tagle-Freire D, Mennah-Govela Y, Bornhorst GM. Starch and protein hydrolysis in cooked quinoa ( Chenopodium quinoa Willd.) during static and dynamic in vitro oral and gastric digestion. Food Funct 2022; 13:920-932. [PMID: 35005748 DOI: 10.1039/d1fo02685b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quinoa is a pseudocereal that has a favorable nutrient profile and may be a beneficial addition to the diet. To evaluate potential health-promoting properties of foods, it is important to understand the rate of macronutrient hydrolysis, which is commonly quantified through in vitro digestion studies. Additionally, limited information is available comparing starch and protein hydrolysis of solid foods using static and dynamic digestion models. The objective of this study was to examine starch and protein hydrolysis in cooked quinoa using a combination of a static (saliva only) or dynamic (saliva + mincing) oral digestion model with a static (gastric fluids only) or dynamic (Human Gastric Simulator) gastric digestion model. Disruption of the pericarp of the cooked quinoa seeds during dynamic oral digestion released additional surface area, which led to faster gastric emptying during dynamic gastric digestion. Starch and protein hydrolysis were impacted by type of gastric model due to differences in pH and variations in structural breakdown. Starch hydrolysis was 29.04 ± 1.83% after 180 min dynamic gastric digestion compared to 2.85 ± 1.88% during static gastric digestion (averaged across both oral digestion models). The degree of protein hydrolysis was 4.85 ± 0.01% after 180 min in the static gastric model compared to 3.94 ± 0.18% in the dynamic gastric model (averaged across both oral digestion models). This information provides evidence on the role of food structure and breakdown (through use of static vs. dynamic oral and gastric digestion models) on quinoa starch and protein hydrolysis.
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Affiliation(s)
- Danny Tagle-Freire
- ESPOL Polytechnic University, Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ingeniería en Mecánica y Ciencias de la Producción, Campus Gustavo Galindo km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador
| | - Yamile Mennah-Govela
- Dept. of Biological and Agricultural Engineering, 1308 Bainer Hall, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA.
| | - Gail M Bornhorst
- Dept. of Biological and Agricultural Engineering, 1308 Bainer Hall, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, USA. .,Riddet Institute, Massey University, Palmerston North, New Zealand
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Keppler S, Huynh K, Reinhold D, Bornhorst GM. Fate of Phytometabolites of Antibiotics during In Vitro Digestion and Implications for Human Health. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:12598-12607. [PMID: 34665628 DOI: 10.1021/acs.jafc.1c03934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Antibiotics are released into the environment as their global consumption increases. Uptake, accumulation, and metabolism of antibiotics by food crops is an emerging health concern as the associated risks of consuming food crops containing antibiotics are still largely unknown. This study investigated the fate of sulfamethazine, sulfamethoxazole, and their phytometabolites during in vitro digestion of the model plantArabidopsis thaliana. The amounts of parent antibiotics released during in vitro digestion were 4-5 times higher than those quantified in plant tissues prior to digestion, which was attributed to back transformation of the phytometabolites into the parent aglycones. These findings demonstrated that overlooking the proportions of phytometabolites in recent health risk assessment studies would considerably underestimate the realistic human exposure through consumption of contaminated food crops. New risk assessment frameworks are necessary to include these critical factors for comprehensively addressing human exposure to emerging contaminants through food chains.
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Affiliation(s)
- Silvia Keppler
- Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California 95616, United States
| | - Khang Huynh
- Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - Dawn Reinhold
- Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - Gail M Bornhorst
- Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California 95616, United States
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18
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Tormási J, Abrankó L. Assessment of Fatty Acid-Specific Lipolysis by In Vitro Digestion and GC-FID. Nutrients 2021; 13:nu13113889. [PMID: 34836142 PMCID: PMC8623358 DOI: 10.3390/nu13113889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 02/03/2023] Open
Abstract
The nutritional relevance of food compositional data could be improved by taking the bioaccessibility of these constituents into account. A lack of routine methods to assess the bioaccessibility of fatty acids (FAs) in food is one of the limiting factors of doing so. An analytical protocol is proposed for routine assessment of the extent of lipolysis via in vitro digestion simulation methods in food products. The established method provides specific information on each FA individually. Steps of the protocol including the Bligh and Dyer chloroform/methanol/water extraction of esterified and free FAs from in vitro digesta, methyl ester derivatization, and GC-FID analysis were specifically tailored to help routine work and were harmonized with the Infogest in vitro digestion simulation protocol (both v1.0 and v2.0). The method was applied to assess the degree of FA-specific lipolysis in a baked fish (carp) meal and the results showed that the FA composition of the original food significantly differed from that of the distribution of FFAs in the digesta. The use of gastric lipase (in Infogest v2.0 protocol) increased total FA release by 9.5% and its specific impact on palmitic acid was the most prominent.
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Alpos M, Leong SY, Liesaputra V, Martin CE, Oey I. Understanding In Vivo Mastication Behaviour and In Vitro Starch and Protein Digestibility of Pulsed Electric Field-Treated Black Beans after Cooking. Foods 2021; 10:foods10112540. [PMID: 34828821 PMCID: PMC8622574 DOI: 10.3390/foods10112540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 11/27/2022] Open
Abstract
The aim of this study was to understand (i) the in vivo mastication behaviour of cooked black beans (chewing duration, texture perception, oral bolus particle size, microstructure, and salivary α-amylase) and (ii) the in vitro digestibility of starch and protein of in vivo-generated black bean oral bolus under simulated gastrointestinal condition. The beans were pre-treated using pulsed electric field (PEF) with and without calcium chloride (CaCl2) addition prior to cooking. The surface response model based on least square was used to optimise PEF processing condition in order to achieve the same texture properties of cooked legumes except for chewiness. In vivo mastication behaviour of the participants (n = 17) was characterized for the particle size of the resulting bolus, their salivary α-amylase activity, and the total chewing duration before the bolus was deemed ready for swallowing. In vitro starch and protein digestibility of the masticated bolus generated in vivo by each participant along the gastrointestinal phase were then studied. This study found two distinct groups of chewers—fast and slow chewers who masticated all black bean beans, on average, for <25 and >29 s, respectively, to achieve a bolus ready for swallowing. Longer durations of chewing resulted in boluses with small-sized particles (majorly composed of a higher number of broken-down cotyledons (2–5 mm2 particle size), fewer seed coats (5–13 mm2 particle size)), and higher activity of α-amylase. Therefore, slow chewers consistently exhibited a higher in vitro digestibility of both the starch and protein of processed black beans compared to fast chewers. Despite such distinct difference in the nutritional implication for both groups of chewers, the in vivo masticated oral bolus generated by fast chewers revealed that the processing conditions involving the PEF and addition of CaCl2 of black beans appeared to significantly (p < 0.05) enhance the in vitro digestibility of protein (by two-fold compared to untreated samples) without stimulating a considerable increase in the starch digestibility. These findings clearly demonstrated that the food structure of cooked black beans created through PEF treatment combined with masticatory action has the potential to modulate a faster hydrolysis of protein during gastrointestinal digestion, thus offering an opportunity to upgrade the quality of legume protein intake in the daily diet.
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Affiliation(s)
- Marbie Alpos
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (M.A.); (S.Y.L.)
- Riddet Institute, Palmerston North 4442, New Zealand
| | - Sze Ying Leong
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (M.A.); (S.Y.L.)
- Riddet Institute, Palmerston North 4442, New Zealand
| | - Veronica Liesaputra
- Department of Computer Science, University of Otago, Dunedin 9054, New Zealand;
| | - Candace E. Martin
- Department of Geology, University of Otago, Dunedin 9054, New Zealand;
| | - Indrawati Oey
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand; (M.A.); (S.Y.L.)
- Riddet Institute, Palmerston North 4442, New Zealand
- Correspondence: ; Tel.: +64-3-479-8735
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20
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Colombo R, Ferron L, Frosi I, Papetti A. Advances in static in vitro digestion models after the COST action Infogest consensus protocol. Food Funct 2021; 12:7619-7636. [PMID: 34250533 DOI: 10.1039/d1fo01089a] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In vitro digestion models are essential to predictively evaluate the bioaccessibility and bioactivity of food molecules or natural products. Dynamic models better simulate the gastrointestinal conditions as they reproduce similar physiological environments. Despite this, static methods, also known as biochemical methods, represent a simple and useful approach for the study of different types of molecules, with a broad applicability in the nutritional, pharmaceutical, and toxicological fields. In addition, static models can be validated, avoiding the disadvantage of a difficult reproducibility of dynamic in vitro systems and inter-individual variations of in vivo experiments. A crucial point in the standardization of static models was the COST Action Infogest in 2014, which elaborated an international consensus static digestion method to harmonize experimental conditions and has general guidelines, thus allowing the comparison of studies and data. The aim of our review is to underline the impact of the Infogest consensus method and the development and evolution of in vitro static methods in the following years, with a focus on food applications.
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Affiliation(s)
- Raffaella Colombo
- Department of Drug Sciences, University of Pavia, V.le Taramelli 12, 27100, Pavia, Italy.
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21
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Wu P, Chen XD. Validation of in vitro bioaccessibility assays — a key aspect in the rational design of functional foods towards tailored bioavailability. Curr Opin Food Sci 2021. [DOI: 10.1016/j.cofs.2021.03.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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22
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Nadia J, Olenskyj AG, Stroebinger N, Hodgkinson SM, Estevez TG, Subramanian P, Singh H, Singh RP, Bornhorst GM. Tracking physical breakdown of rice- and wheat-based foods with varying structures during gastric digestion and its influence on gastric emptying in a growing pig model. Food Funct 2021; 12:4349-4372. [PMID: 33884384 DOI: 10.1039/d0fo02917c] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
There is currently a limited understanding of the effect of food structure on physical breakdown and gastric emptying of solid starch-based foods during gastric digestion. Moisture uptake, pH, particle size, rheological, and textural properties of six solid starch-based diets from different sources (Durum wheat and high amylose white rice) and of different macrostructures (porridge, native grain, agglomerate/couscous, and noodle) were monitored during 240 min of gastric digestion in a growing pig model. Changes in the physical properties of the gastric digesta were attributed to the influence of gastric secretions and gastric emptying, which were both dependent on the buffering capacity and initial macrostructure of the diets. Differences between the proximal and distal stomach regions were found in the intragastric pH and texture of the gastric digesta. For example, rice couscous, which had the smallest particle size and highest buffering capacity among the rice-based diets, had the shortest gastric emptying half-time and no significant differences between proximal and distal stomach digesta physical properties. Additionally, a relationship between gastric breakdown rate, expressed as gastric softening half-time from texture analysis, and gastric emptying half-time of dry matter was also observed. These findings provide new insights into the breakdown processes of starch-based solid foods in the stomach, which can be beneficial for the development of food structures with controlled rates of breakdown and gastric emptying during digestion.
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Affiliation(s)
- Joanna Nadia
- School of Food and Advanced Technology, Massey University, Private Bag 11222, Palmerston North, New Zealand
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23
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Nadia J, Bronlund J, Singh RP, Singh H, Bornhorst GM. Structural breakdown of starch-based foods during gastric digestion and its link to glycemic response: In vivo and in vitro considerations. Compr Rev Food Sci Food Saf 2021; 20:2660-2698. [PMID: 33884751 DOI: 10.1111/1541-4337.12749] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/19/2021] [Accepted: 03/08/2021] [Indexed: 01/10/2023]
Abstract
The digestion of starch-based foods in the small intestine as well as factors affecting their digestibility have been previously investigated and reviewed in detail. Starch digestibility has been studied both in vivo and in vitro, with increasing interest in the use of in vitro models. Although previous in vivo studies have indicated the effect of mastication and gastric digestion on the digestibility of solid starch-based foods, the physical breakdown of starch-based foods prior to small intestinal digestion is often less considered. Moreover, gastric digestion has received little attention in the attempt to understand the digestion of solid starch-based foods in the digestive tract. In this review, the physical breakdown of starch-based foods in the mouth and stomach, the quantification of these breakdown processes, and their links to physiological outcomes, such as gastric emptying and glycemic response, are discussed. In addition, the physical breakdown aspects related to gastric digestion that need to be considered when developing in vitro-in vivo correlation in starch digestion studies are discussed. The discussion demonstrates that physical breakdown prior to small intestinal digestion, especially during gastric digestion, should not be neglected in understanding the digestion of solid starch-based foods.
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Affiliation(s)
- Joanna Nadia
- School of Food and Advanced Technology, Massey University, Palmerston North, New Zealand.,Riddet Institute, Massey University, Palmerston North, New Zealand
| | - John Bronlund
- School of Food and Advanced Technology, Massey University, Palmerston North, New Zealand.,Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Rajinder Paul Singh
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA
| | - Harjinder Singh
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Gail M Bornhorst
- Riddet Institute, Massey University, Palmerston North, New Zealand.,Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California, USA
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24
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Mennah-Govela YA, Bornhorst GM. Breakdown mechanisms of whey protein gels during dynamic in vitro gastric digestion. Food Funct 2021; 12:2112-2125. [DOI: 10.1039/d0fo03325a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Particle geometry influenced the breakdown mechanisms impacting the pH, pepsin activity, and protein hydrolysis of whey protein gels during dynamic in vitro gastric digestion.
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Affiliation(s)
- Yamile A. Mennah-Govela
- Dept. of Biological and Agricultural Engineering
- 1308 Bainer Hall
- University of California
- Davis
- Davis
| | - Gail M. Bornhorst
- Dept. of Biological and Agricultural Engineering
- 1308 Bainer Hall
- University of California
- Davis
- Davis
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25
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Hayes AMR, Swackhamer C, Mennah-Govela YA, Martinez MM, Diatta A, Bornhorst GM, Hamaker BR. Pearl millet (Pennisetum glaucum) couscous breaks down faster than wheat couscous in the Human Gastric Simulator, though has slower starch hydrolysis. Food Funct 2020; 11:111-122. [DOI: 10.1039/c9fo01461f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Pearl millet couscous broke down into smaller, more numerous particles that had slower starch hydrolysis compared to wheat couscous.
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Affiliation(s)
- Anna M. R. Hayes
- Whistler Center for Carbohydrate Research & Department of Food Science
- Purdue University
- West Lafayette
- USA
| | - Clay Swackhamer
- Department of Biological and Agricultural Engineering
- University of California
- Davis
- USA
| | | | | | - Aminata Diatta
- Whistler Center for Carbohydrate Research & Department of Food Science
- Purdue University
- West Lafayette
- USA
| | - Gail M. Bornhorst
- Department of Biological and Agricultural Engineering
- University of California
- Davis
- USA
- Riddet Institute
| | - Bruce R. Hamaker
- Whistler Center for Carbohydrate Research & Department of Food Science
- Purdue University
- West Lafayette
- USA
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26
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Rios-Villa KA, Bhattacharya M, La EH, Barile D, Bornhorst GM. Interactions between whey proteins and cranberry juice after thermal or non-thermal processing during in vitro gastrointestinal digestion. Food Funct 2020; 11:7661-7680. [DOI: 10.1039/d0fo00177e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study entails the possible interactions between whey protein and cranberry juice after processing, impacting either the protein digestibility or the bioaccessibility of cranberry antioxidants using an in vitro gastrointestinal digestion model.
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Affiliation(s)
- Karen A. Rios-Villa
- Department of Food Science and Technology
- University of California at Davis
- Davis
- USA
| | | | - Ellia H. La
- Foods for Health Institute
- University of California at Davis
- Davis
- USA
| | - Daniela Barile
- Department of Food Science and Technology
- University of California at Davis
- Davis
- USA
- Foods for Health Institute
| | - Gail M. Bornhorst
- Department of Food Science and Technology
- University of California at Davis
- Davis
- USA
- Department of Biological and Agricultural Engineering
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