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Li C. Structural basis for rice starch multi-digestible fractions revealed by consecutive reaction kinetics model. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:4203-4210. [PMID: 36641546 DOI: 10.1002/jsfa.12451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/18/2022] [Accepted: 01/15/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Starch-based foods (e.g. rice) usually contain multiple starch fractions with distinct digestion rate constants, although their nature is currently unknown. The present study applied the recently developed consecutive reaction kinetics model to fit the in vitro digestion curves for starch fractions deconvoluted from the overall digestograms to differentiate their binding and catalysis rates to starch digestive enzymes. The fitting parameters were then correlated with starch molecular structures obtained from published data to understand starch structural features determining the binding and catalytic rate constants. RESULTS Binding and catalysis rates for the rapidly (RDF) and slowly digestible starch fraction (SDF) were controlled by distinct starch structural features. Typically, (i) the binding rate constant for RDF was negatively correlated with the amount of amylose short to intermediate chains, whereas it was positively correlated with the relative length of amylopectin intermediate chains; (ii) the catalysis rate constant for RDF was negatively correlated with the amount of amylose short to intermediate chains, relative length of amylose intermediate chains and amount of amylopectin long chains, whereas it was positively correlated with starch molecular size as well as relative length of amylopectin intermediate chains; (iii) and the catalysis rate constant for SDF was negatively correlated with the amount of amylopectin long chains, whereas it was positively correlated with starch molecular size. CONCLUSION These results provide a better understanding of the nature of different starch digestible fractions and the development of foods such as rice with slow starch digestibility. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Cheng Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
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Li C, Li S. A procedure for determining the number and pattern of digestible starch fractions in multiphasic food digestograms. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:1651-1659. [PMID: 36326592 DOI: 10.1002/jsfa.12311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/23/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Plant-based foods are frequently heterogenous systems, containing multiple starch fractions with distinct digestion rate constants. An unbiased determination of the number and digestion pattern of these fractions is a prerequisite for understanding the digestive characteristics of food. RESULTS A non-linear least-squares procedure based on a conditional selection of simple first-order kinetics or a combination of parallel and sequential kinetics models was developed. The procedure gave robust results fitting manually generated data, and was applied to in vitro experimental digestion data of retrograded rice starches. By correlating fitting parameters with starch structural parameters, it showed that rice starches with a lower amylose content, longer amylose chains, and amylopectin intermediate chains had more digestible starch fractions after long-term retrogradation. CONCLUSION This procedure enables the structural basis of starch digestibility and the development of food products with slow starch digestibility to be better understood. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Cheng Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- Joint International Research Laboratory of Agriculture Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Songnan Li
- Joint International Research Laboratory of Agriculture Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, China
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3
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Wang H, Peng X, Zhang K, Li X, Zhao P, Liu H, Yu W. A more general approach for predicting the glycemic index (GI) values of commercial noodles. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Predicting the Glycemic Index of Biscuits Using Static In Vitro Digestion Protocols. Foods 2023; 12:foods12020404. [PMID: 36673499 PMCID: PMC9858452 DOI: 10.3390/foods12020404] [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: 11/04/2022] [Revised: 01/02/2023] [Accepted: 01/10/2023] [Indexed: 01/19/2023] Open
Abstract
In vitro digestion methods that can accurately predict the estimated GI (eGI) values of complex carbohydrate foods, including biscuits, are worth exploring. In the current study, standard commercial biscuits with varied clinical GI values between 9~30 were digested using both the INFOGEST and single-enzyme digestion protocols. The digestion kinetic parameters were acquired through mathematical fitting by mathematical kinetics models. The results showed that compared with the INFOGEST protocol, the AUR180 deduced from digesting using either porcine pancreatin or α-amylase showed the best potential in predicting the eGI values. Accordingly, mathematical equations were established based on the relations between the AUR180 and the GI values. When digesting using porcine pancreatin, GI= 1.834 + 0.009 ×AUCR180 (R2= 0.952), and when digesting using only α-amylase, GI= 6.101 + 0.009 ×AUCR180 (R2=0.902). The AUR180 represents the area under the curve of the reducing-sugar content normalized to the total carbohydrates versus the digestion time in 180 min. The in vitro method presented enabled the rapid and accurate prediction of the eGI values of biscuits, and the validity of the formula was verified by another batch of biscuits with a known GI, and the error rate of most samples was less than 30%.
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Li C. Starch fine molecular structures: The basis for designer rice with slower digestibility and desirable texture properties. Carbohydr Polym 2023; 299:120217. [PMID: 36876819 DOI: 10.1016/j.carbpol.2022.120217] [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: 07/22/2022] [Revised: 09/27/2022] [Accepted: 10/08/2022] [Indexed: 11/09/2022]
Abstract
Development of whole rice with low glycaemic index has been achieved, however, these rices are frequently associated with a poor texture property. Recent advances in terms of understanding the importance of starch fine molecular structures on the starch digestibility/texture of cooked whole rice have shed new insights on mechanisms of starch digestibility and texture from molecular levels. With an extensive discussion on the correlative and causal relationships among starch molecular structure, texture and starch digestibility of cooked whole rice, this review identified desirable starch fine molecular structures contributing to both slow starch digestibility and preferable textures. For instance, the selection of rice variety having more amylopectin intermediate chains while less amylopectin long chains might help develop cooked whole rice with both slower starch digestibility and softer texture. The information could help rice industry transform cooked whole rice into a healthier food product with slow starch digestibility and desirable texture.
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Affiliation(s)
- Cheng Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, College of Agriculture, Yangzhou University, Yangzhou, Jiangsu, 225009, China.
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Li C, Li E. Relations between in vitro starch digestibility of commercial baked products and their macronutrients. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:7363-7369. [PMID: 35780331 DOI: 10.1002/jsfa.12103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 06/17/2022] [Accepted: 07/03/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Baked products such as biscuits and breads are the staple foods for a large population, with the starch digestion rate having a crucial effect on human health. Currently, there is a lack of information on general starch digestibility in commercial baked products and its correlation with macronutrient content. RESULTS The present study investigated the starch digestibility of 35 commercial baked products, ranging from low to high moisture contents. Biscuits generally had a slower starch digestion rate than mini-breads, whereas breads including whole wheat bread had the fastest digestion rate. Additionally, starch digestibility was negatively correlated with the calorie (R2 = 0.71) and fat content (R2 = 0.56) in per serving size, possibly because of the formation of amylose-lipid complex. CONCLUSION The present study provides a database for the in vitro starch digestibility of a large number of food items, which gives general indications on the performance of starch components of commercial products in the human gastrointestinal tract. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Cheng Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
- 2Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Enpeng Li
- Key Laboratory of Plant Functional Genomics of the Ministry of Education/ Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, China
- Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
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7
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Alkali-washing facilitates thermal-processed lignin to slow the hydrolysis of pancreatic α-amylase in starchy foods. Carbohydr Polym 2022; 290:119502. [DOI: 10.1016/j.carbpol.2022.119502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/10/2022] [Accepted: 04/13/2022] [Indexed: 11/22/2022]
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Li C, Yu W, Zhang X, Zou W, Liu H. Definition of starch components in foods by first-order kinetics to better understand their physical basis. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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9
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Yang Y, Jiao A, Liu Q, Ren X, Zhu K, Jin Z. The effects of removing endogenous proteins, β-glucan and lipids on the surface microstructure, water migration and glucose diffusion in vitro of starch in highland barley flour. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107457] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Zhao Y, Henry RJ, Gilbert RG. Testing the Linearity Assumption for Starch Structure-Property Relationships in Rices. Front Nutr 2022; 9:916751. [PMID: 35677552 PMCID: PMC9168890 DOI: 10.3389/fnut.2022.916751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/02/2022] [Indexed: 11/28/2022] Open
Abstract
Many properties of starch-containing foods are significantly statistically correlated with various structural parameters. The significance of a correlation is judged by the p-value, and this evaluation is based on the assumption of linear relationships between structural parameters and properties. We here examined the linearity assumption to see if it can be used to predict properties at conditions that are not close to those under which they were measured. For this we used both common domesticated rices (DRs) and Australian wild rices (AWRs), the latter having significantly different structural parameters and properties compared to DRs. The results showed that (1) the properties were controlled by more than just the amylopectin or amylose chain-length distributions or amylose content, other structural features also being important, (2) the linear model can predict the enthalpy ΔHg of both AWRs and DRs from the structural parameters to some extent but is often not accurate; it can predict the ΔHg of indica rices with acceptable accuracy from the chain length distribution and the amount of longer amylose chains (degree of polymerization > 500), and (3) the linear model can predict the stickiness of both AWRs and DRs to acceptable accuracy in terms of the amount of longer amylose chains. Thus, the commonly used linearity assumption for structure-property correlations needs to be regarded circumspectly if also used for quantitative prediction.
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Affiliation(s)
- Yingting Zhao
- Centre for Nutrition and Food Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
- Jiangsu Key Laboratory of Crop Genetics and Physiology/State Key Laboratory of Hybrid Rice, College of Agriculture, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Jiangsu Co-innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
| | - Robert J. Henry
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Robert G. Gilbert
- Centre for Nutrition and Food Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
- Jiangsu Key Laboratory of Crop Genetics and Physiology/State Key Laboratory of Hybrid Rice, College of Agriculture, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Jiangsu Co-innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
- *Correspondence: Robert G. Gilbert
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11
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Sasaki T. Influence of xanthan gum and gluten on
in vitro
digestibility and textural properties of rice bread. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15593] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Tomoko Sasaki
- National Agriculture and Food Research Organization National Food Research Institute Tsukuba Ibaraki Japan
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12
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Li C, Hu Y. In vitro and animal models to predict the glycemic index value of carbohydrate-containing foods. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.12.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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13
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Zeng Y, Ali MK, Du J, Li X, Yang X, Yang J, Pu X, Yang L, Hong J, Mou B, Li L, Zhou Y. Resistant Starch in Rice: Its Biosynthesis and Mechanism of Action Against Diabetes-Related Diseases. FOOD REVIEWS INTERNATIONAL 2022. [DOI: 10.1080/87559129.2021.2024221] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yawen Zeng
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Muhammad Kazim Ali
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
- Karachi Institute of Biotechnology and Genetic Engineering, University of Karachi, Karachi, Pakistan
| | - Juan Du
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Xia Li
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Xiaomeng Yang
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
- Key Laboratory of the Southwestern Crop Gene Resources and Germplasm Innovation, Ministry of Agriculture, Kunming, China
| | - Jiazhen Yang
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Xiaoying Pu
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Li’E Yang
- Agricultural Biotechnology Key Laboratory of Yunnan Province, Biotechnology and Germplasm Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Jingan Hong
- Clinical Nutrition Department, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Bo Mou
- Clinical Nutrition Department, The Second People’s Hospital of Yunnan Province, Kunming, China
| | - Ling Li
- Biomedical Engineering Research Center, Kunming Medical University, Kunming, China
| | - Yan Zhou
- Clinical Nutrition Department, The Second People’s Hospital of Yunnan Province, Kunming, China
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15
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Yu W, Zhou X, Li C. Application of first-order kinetics modeling to reveal the nature of starch digestion characteristics. Food Funct 2021; 12:6652-6663. [PMID: 34114587 DOI: 10.1039/d1fo00450f] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mathematical modeling of in vitro starch digestograms is essential to understand starch structure-digestibility relationships as it covers all detailed information of the starch digestograms with only a few kinetics-based parameters. However, many assumptions exist for these mathematical models, which are frequently overlooked by researchers and lead to inappropriate or even wrong interpretations of the fitted parameters. This review presents a critical evaluation of four mostly applied empirical first-order kinetics models including single first-order kinetics (SK), logarithm of slope (LOS) transformed kinetics, parallel first-order kinetics (PK) and the combination of parallel and sequential (CPS) kinetics models. For homogeneous food systems, the SK model is perfectly suitable, whereas the LOS, PK and CPS models were suitably developed for food systems containing multiple digestible fractions. For the digestion of starch containing multiple digestible fractions, the LOS model assumed a sequential digestion pattern, whereas the PK model assumed a parallel pattern. In the current review, there is also emphasis on the recently developed CPS model, which is able to differentiate the sequential and parallel digestion patterns for different starch digestible fractions existing in food systems. Understanding these assumptions enables a better selection of an appropriate mathematical model for improving the understanding of in vitro starch digestion characteristics. This review meets the growing interest of the food industry in terms of developing a new generation of foods with slower starch digestibility.
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Affiliation(s)
- Wenwen Yu
- Department of Food Science & Engineering, Jinan University, Huangpu West Avenue 601, Guangzhou City, China
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Zhao Y, Henry RJ, Gilbert RG. Starch structure-property relations in Australian wild rices compared to domesticated rices. Carbohydr Polym 2021; 271:118412. [PMID: 34364554 DOI: 10.1016/j.carbpol.2021.118412] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 07/04/2021] [Accepted: 07/05/2021] [Indexed: 12/30/2022]
Abstract
There are many genetic differences between Australian wild rices (AWRs) and domesticated rices (DRs), causing differences in starch molecular structure and starch-related functional properties; these are examined here for polished AWRs and polished DRs. Starch structural parameters for amylopectin and amylose were obtained using size-exclusion chromatography, with and without enzymatic debranching. Thermal properties of starch, in-vitro digestibility and texture of three AWRs were measured and compared to those of typical DRs. The results showed that AWR starches had (a) higher amylose content than most DRs, resulting in a higher gelatinization temperature, (b) fewer amylopectin short chains, causing a higher gelatinization enthalpy, and (c) more amylose shorter chains and more amylopectin longer chains, both causing a slower in-vitro digestion rate. The textural characteristics of AWRs are not significantly different from those of DRs. These findings suggest that AWRs are a potential source of nutritionally-desirable but palatable slowly-digestible starch.
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Affiliation(s)
- Yingting Zhao
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, College of Agriculture, Yangzhou University, Yangzhou, Jiangsu 225009, China; The University of Queensland, Queensland Alliance for Agriculture and Food Innovation, Brisbane, QLD, 4072, Australia
| | - Robert J Henry
- The University of Queensland, Queensland Alliance for Agriculture and Food Innovation, Brisbane, QLD, 4072, Australia
| | - Robert G Gilbert
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, College of Agriculture, Yangzhou University, Yangzhou, Jiangsu 225009, China; The University of Queensland, Queensland Alliance for Agriculture and Food Innovation, Brisbane, QLD, 4072, Australia.
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Zou W, Zhang X, Stockmann R. Thermally processed lignin reduces the apparent hydrolysis rate of pancreatic α-amylase in starchy foods. Carbohydr Polym 2021; 263:117961. [PMID: 33858568 DOI: 10.1016/j.carbpol.2021.117961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 10/21/2022]
Abstract
Lignin, despite being the second most abundant constituent of plant cell walls, is thought to be chemically inert during gastrointestinal digestion and therefore attracts little attention for its role in the human diet. This study explores the heat modifications of lignin to derive species capable of slowing starch digestion in vitro. We applied various advanced biochemical (e.g. enzymic digestion, solubility) and physio-chemical (e.g. scanning electron microscopy, Fourier-Transform-Infrared Spectroscopy, 13C-NMR) analyses to characterize the structure-function of lignin induced by heat treatment. It was found that lignin thermally processed above 300 °C reduced the apparent hydrolysis rate of pancreatic α-amylase, which is ascribed mainly to the insoluble lignin with a modified particle surface morphology. Further kinetic experiments showed that lignin species derived by thermal processing slowed in vitro digestion rates of potato starch and pasta. These findings highlight the potential for utilizing thermally processed lignin in slowing digestion of starchy foods.
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Affiliation(s)
- Wei Zou
- Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, Werribee, VIC, Australia.
| | - Xiaoqing Zhang
- Manufacturing, Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia.
| | - Regine Stockmann
- Agriculture and Food, Commonwealth Scientific and Industrial Research Organisation, Werribee, VIC, Australia.
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