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Mchunu ZG, Mthana MS, Mthiyane DM. Dietary effects of Sclerocarya birrea caffra seed cake replacing soyabean meal on physiology, meat and bone quality of indigenous chickens. Vet Anim Sci 2024; 25:100364. [PMID: 38873090 PMCID: PMC11168487 DOI: 10.1016/j.vas.2024.100364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024] Open
Abstract
This study investigated marula seed cake (MSC) as alternative protein source (APS) replacing soyabean meal (SBM) in indigenous chicken diets. Four hundred, 3-week-old Boschveld chicks were randomly allocated to 5 iso-energetic-nitrogenous maize and SBM-based grower diets with 0, 10, 15, 20, and 25 % MSC, each with 5 replicate pens of 16 birds, in a completely randomised design (CRD), for 9 weeks. Results showed that dietary MSC quadratically decreased bird overall feed intake (FI) (P < 0.001) and body weight gain (BWG) (P < 0.01) as it linearly decreased the weights of hot carcass (HCW; P < 0.05), spleen (P < 0.05), jejunum (P < 0.05), ileum (P < 0.001), and caecum (P < 0.001). In contrast, MSC increased chicken serum glucose (P < 0.05), cholesterol (P = 0.001) and phosphate (P < 0.05) as it decreased its amylase activity (P < 0.01). Also, it decreased bird meat lightness at 45 min (P < 0.05) and its yellowness at 45 min (P < 0.001) and 24 h (P < 0.001) whilst it increased its redness at 45 min (P < 0.01) and 24 h (P < 0.05) post-slaughter. In addition, MSC decreased chicken bone medial diaphysis (P < 0.05) as it induced no effects (P > 0.05) on overall feed conversion efficiency (FCE) and all other parameters. In conclusion, feeding of ≤ 15 % dietary MSC is nutritionally safe for indigenous chickens whilst detrimental on bird appetite, growth and meat yield, however without significantly affecting their physiology, at higher inclusion levels.
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Affiliation(s)
- Zibukile G. Mchunu
- Department of Animal Science, School of Agricultural Sciences, Faculty of Natural and Agricultural Sciences, North-West University (Mahikeng Campus), Private Bag X 2046, Mmabatho, 2735, South Africa
| | - Makiwa S. Mthana
- Department of Animal Science, School of Agricultural Sciences, Faculty of Natural and Agricultural Sciences, North-West University (Mahikeng Campus), Private Bag X 2046, Mmabatho, 2735, South Africa
| | - Doctor M.N Mthiyane
- Department of Animal Science, School of Agricultural Sciences, Faculty of Natural and Agricultural Sciences, North-West University (Mahikeng Campus), Private Bag X 2046, Mmabatho, 2735, South Africa
- Food Security and Safety Focus Area, Faculty of Natural and Agricultural Sciences, North-West University (Mahikeng Campus), Mmabatho, 2735, South Africa
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Yin H, Zhu J, Zhong Y, Wang D, Deng Y. Kinetic and thermodynamic-based studies on the interaction mechanism of novel R. roxburghii seed peptides against pancreatic lipase and cholesterol esterase. Food Chem 2024; 447:139006. [PMID: 38492305 DOI: 10.1016/j.foodchem.2024.139006] [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: 11/25/2023] [Revised: 03/02/2024] [Accepted: 03/09/2024] [Indexed: 03/18/2024]
Abstract
Pancreatic lipase (PL) and cholesterol esterase (CE) are vital digestive enzymes that regulate lipid digestion. Three bioactive peptides (LFCMH, RIPAGSPF, YFRPR), possessing enzyme inhibitory activities, were identified in the seed proteins of R. roxburghii. It is hypothesized that these peptides could inhibit the activities of these enzymes by binding to their active sites or altering their conformation. The results showed that LFCMH exhibited superior inhibitory activity against these enzymes compared to the other peptides. The inhibition mechanisms of the three peptides were identified as either competitive or mixed, according to inhibition models. Further studies have shown that peptides could bind to the active sites of enzymes, thus affecting their spatial conformation and restricting substrate entry into the active site. Molecular simulation further proved that hydrogen bonds and hydrophobic interactions played a vital role in the binding of peptides to enzymes. This study enriches our understanding of interaction mechanisms of peptides on PL and CE.
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Affiliation(s)
- Hao Yin
- Department of Food Science & Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Shanghai Jiao Tong University Yunnan (Dali) Research Institute, Dali, Yunnan 671000, China
| | - Jiangxiong Zhu
- Department of Food Science & Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yu Zhong
- Department of Food Science & Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Danfeng Wang
- Department of Food Science & Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yun Deng
- Department of Food Science & Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China; Shanghai Jiao Tong University Yunnan (Dali) Research Institute, Dali, Yunnan 671000, China.
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Guo J, Hu M, Yang M, Cao H, Li H, Zhu J, Li S, Zhang J. Inhibition mechanism of theaflavins on matrix metalloproteinase-2: inhibition kinetics, multispectral analysis, molecular docking and molecular dynamics simulation. Food Funct 2024; 15:7452-7467. [PMID: 38910519 DOI: 10.1039/d4fo01620c] [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: 06/25/2024]
Abstract
Dental caries is a chronic and destructive disease and matrix metalloproteinase-2 (MMP-2) plays a major role in caries. The inhibitory mechanisms of theaflavins [theaflavin (TF1), theaflavin-3-gallate (TF2A), theaflavin-3'-gallate (TF2B), and theaflavin-3,3'-digallate (TF3)] on MMP-2 were investigated using techniques such as enzyme inhibition kinetics, multi-spectral methods, molecular docking, and molecular dynamics simulations. The results showed that TF1, TF2A, TF2B, and TF3 all competitively and reversibly inhibited MMP-2 activity. Fluorescence spectra and molecular docking indicated that four theaflavins spontaneously bind to MMP-2 through noncovalent interactions, driven by hydrogen bonds and hydrophobic interactions, constituting a static quenching mechanism and resulting in an altered tryptophan residue environment around MMP-2. Molecular dynamic simulations demonstrated that four theaflavins can form stable, compact complexes with MMP-2. In addition, the order of theaflavins' ability to inhibit MMP-2 was found to be TF1 > TF2B > TF2A > TF3. Interestingly, the order of binding capacity between MMP-2 and TF1, TF2A, TF2B, and TF3 was consistent with the order of inhibitory capacity, and was opposite to the order of steric hindrance of theaflavins. This may be due to the narrow space of the active pocket of MMP-2, and the smaller the steric hindrance of theaflavins, the easier it is to enter the active pocket and bind to MMP-2. This study provided novel insights into theaflavins as functional components in the exploration of natural MMP-2 inhibitors.
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Affiliation(s)
- Jing Guo
- Department of Dental General and Emergency, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, No. 688 Honggu North Road, Honggutan District, Nanchang 330038, People's Republic of China.
- Jiangxi Province Key Laboratory of Oral Biomedicine, People's Republic of China
- Jiangxi Province Clinical Research Center for Oral Diseases, People's Republic of China
| | - Mengna Hu
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, People's Republic of China
| | - Mingqi Yang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, People's Republic of China
| | - Huang Cao
- Department of Dental General and Emergency, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, No. 688 Honggu North Road, Honggutan District, Nanchang 330038, People's Republic of China.
- Jiangxi Province Key Laboratory of Oral Biomedicine, People's Republic of China
- Jiangxi Province Clinical Research Center for Oral Diseases, People's Republic of China
| | - Hongan Li
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, People's Republic of China
| | - Jiayu Zhu
- Department of Dental General and Emergency, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, No. 688 Honggu North Road, Honggutan District, Nanchang 330038, People's Republic of China.
- Jiangxi Province Key Laboratory of Oral Biomedicine, People's Republic of China
- Jiangxi Province Clinical Research Center for Oral Diseases, People's Republic of China
| | - Shuang Li
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, People's Republic of China
| | - Jinsheng Zhang
- State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, People's Republic of China
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Syaifie PH, Ibadillah D, Jauhar MM, Reninta R, Ningsih S, Ramadhan D, Arda AG, Ningrum DWC, Kaswati NMN, Rochman NT, Mardliyati E. Phytochemical Profile, Antioxidant, Enzyme Inhibition, Acute Toxicity, In Silico Molecular Docking and Dynamic Analysis of Apis Mellifera Propolis as Antidiabetic Supplement. Chem Biodivers 2024; 21:e202400433. [PMID: 38584139 DOI: 10.1002/cbdv.202400433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/31/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
This study aims to identify the phytochemical profile of Apis mellifera propolis and explore the potential of its anti-diabetic activity through inhibition of α-amylase (α-AE), α-glucosidase(α-GE), as well as novel antidiabetic compounds of propolis. Apis mellifera propolis extract (AMPE) exhibited elevated polyphenol 33.26±0.17 (mg GAE/g) and flavonoid (15.45±0.13 mg RE/g). It also indicated moderate strong antioxidant activity (IC50 793.09±1.94 μg/ml). This study found that AMPE displayed promising α-AE and α-GE inhibition through in vitro study. Based on LC-MS/MS screening, 18 unique AMPE compounds were identified, with majorly belonging to anthraquinone and flavonoid compounds. Furthermore, in silico study determined that 8 compounds of AMPE exhibited strong binding to α-AE that specifically interacted with its catalytic residue of ASP197. Moreover, 2 compounds exhibit potential inhibition of α-GE, by interacting with crucial amino acids of ARG315, ASP352, and ASP69. Finally, we suggested that 2,7-Dihydroxy-1-(p-hydroxybenzyl)-4-methoxy-9,10-dihydrophenanthrene and 3(3-(3,4-Dihydroxybenzyl)-7-hydroxychroman-4-one as novel inhibitors of α-AE and α-GE. Notably, these compounds were initially discovered from Apis mellifera propolis in this study. The molecular dynamic analysis confirmed their stable binding with both enzymes over 100 ns simulations. The in vivo acute toxicity assay reveals AMPE as a practically non-toxic product with an LD50 value of 16,050 mg/kg. Therefore, this propolis may serve as a promising natural product for diabetes mellitus treatment.
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Affiliation(s)
- Putri Hawa Syaifie
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
| | - Delfritama Ibadillah
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
| | - Muhammad Miftah Jauhar
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
- Biomedical Engineering, Graduate School of Universitas Gadjah Mada, Sleman, 55281, Yogyakarta, Indonesia
| | - Rikania Reninta
- Research Center for Applied Botany, National Research and Innovation Agency (BRIN), Cibinong, 16911, Indonesia
| | - Sri Ningsih
- Research Center for Pharmaceutical Ingredients and Traditional Medicine, National Research and Innovation Agency (BRIN), Cibinong, 16911, Indonesia
| | - Donny Ramadhan
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
- Research Center for Pharmaceutical Ingredients and Traditional Medicine, National Research and Innovation Agency (BRIN), Cibinong, 16911, Indonesia
| | - Adzani Gaisani Arda
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, University of Debrecen, Debrecen, H-4032, Hungary
| | - Dhecella Winy Cintya Ningrum
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
| | - Nofa Mardia Ningsih Kaswati
- Center of Excellece Life Sciences, Nano Center Indonesia, Jl. PUSPIPTEK, South Tangerang, 15314, Banten, Indonesia
| | - Nurul Taufiqu Rochman
- Research Center for Advanced Materials, National Research and Innovation Agency (BRIN), South Tangerang, 15314, Indonesia
| | - Etik Mardliyati
- Research Center for Vaccine and Drugs, National Research and Innovation Agency (BRIN), Cibinong, 16911, Indonesia
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Slavova I, Genisheva T, Angelova G, Chalumov V, Tomova T, Argirova M. Hypoglycemic Effects of Extracts Obtained from Endemic Betonica bulgarica Degen and Neič. PLANTS (BASEL, SWITZERLAND) 2024; 13:1406. [PMID: 38794476 PMCID: PMC11125167 DOI: 10.3390/plants13101406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/14/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024]
Abstract
The increasing prevalence of diabetes mellitus, together with the limited access of many patients to conventional antidiabetic drugs and the side effects resulting from their use, are the reason for the ever-increasing need for new agents. One of the most important strategies used in the therapy of this disease is to reduce the postprandial blood glucose level by inhibiting the carbohydrate-degrading enzymes α-amylase and α-glucosidase. The purpose of the present study was to provide in vitro evidence for the potential hypoglycemic effect of leaf and inflorescence aqueous extracts of Bulgarian endemic species Betonica bulgarica Degen and Neič. Total phenolic and flavonoid contents and antioxidant activities were determined by spectrophotometric methods. Qualitative and quantitative determinations of principal phenolic acids and flavonoids were performed using HPLC with a dual absorbance detector. The plant extracts were able to retard the enzymatic breakdown of starch to glucose with 50% inhibiting concentrations of 1.86 mg/mL and 1.54 mg/mL respectively for leaf and flower extract. Some of the plant constituents are proven inhibitors of α-amylase and/or α-glucosidase, but their adsorption on starch seems to be one additional mechanism for the inhibition of glucose release. Combination index analysis carried out with binary mixtures of acarbose and plant extracts showed a tendency toward synergism with an increase in concentrations and level of inhibition.
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Affiliation(s)
- Iva Slavova
- Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 15A Vassil Aprilov Str., Plovdiv 4002, Bulgaria (T.T.); (M.A.)
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Zhang Z, Feng Y, Wang H, He H. Synergistic modification of hot-melt extrusion and nobiletin on the multi-scale structures, interactions, thermal properties, and in vitro digestibility of rice starch. Front Nutr 2024; 11:1398380. [PMID: 38812933 PMCID: PMC11133735 DOI: 10.3389/fnut.2024.1398380] [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: 03/09/2024] [Accepted: 04/16/2024] [Indexed: 05/31/2024] Open
Abstract
Background Rice starch has high digestibility due to its large carbohydrate content. Synergistic modification of hot-melt extrusion (HME) and additives such as flavonoids, hydrocolloids, proteins, lipids, and other additives has the tendency to retard the rate of starch hydrolysis. Hence, the current investigation aimed to study the combined effect of the HME-assisted addition of nobiletin (NOB, 0, 2, 4, and 6%) on the multi-scale structures, interactions, thermal, and digestibility characteristics of rice starch. Methods The study employed density functional theory calculations and an infrared second derivative of an Fourier-transform infrared (FTIR) spectrometer to analyze the interactions between NOB and starch. The physicochemical properties of the starch extrudates were characterized by FTIR, 13C nuclear magnetic resonance, X-ray diffraction, and differential scanning calorimetry, while the digestibility was evaluated using an in vitro digestion model. Results HME was found to disrupt the crystalline structure, helix structure, short-ordered structure, and thermal properties of starch. The interaction between NOB and starch involved hydrophobic interactions and hydrogen bonds, effectively preventing the molecular chains of starch from interacting with each other and disrupting their double helix structure. The addition of NOB led to the formation of a highly single-helical V-type crystalline structure, along with the formation of ordered structural domains. Consequently, the combined treatment significantly enhanced the ordered structure and thermal stability of starch, thus effectively leading to an increase in resistant starch and slowly digestion starch. Discussion The study underscores that synergistic modification of HME and NOB holds promise for enhancing both the nutritional value and functional properties of rice starch. These findings offer valuable insights for developing high-quality rice starch products with broader applications.
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Affiliation(s)
- Zhihong Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, Hainan, China
| | - Ying Feng
- Department of Nutrition and Food Hygiene, School of Public Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, Hainan, China
| | - Honglan Wang
- Department of Nutrition and Food Hygiene, School of Public Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, Hainan, China
| | - Hai He
- Department of Nutrition and Food Hygiene, School of Public Health, Heinz Mehlhorn Academician Workstation, Hainan Medical University, Haikou, Hainan, China
- Department of Endocrinology and Metabolism, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde), Foshan, Guangdong, China
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Jiang J, Fan H, Zhou J, Qin J, Qin Z, Chen M, Shen Y, Liu X. In vitro inhibitory effect of five natural sweeteners on α-glucosidase and α-amylase. Food Funct 2024; 15:2234-2248. [PMID: 38318730 DOI: 10.1039/d3fo05234f] [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: 02/07/2024]
Abstract
A promising and efficacious approach to manage diabetes is inhibiting α-glucosidase and α-amylase activity. Therefore, the inhibitory activities of five natural sweeteners (mogrosides (Mog), stevioside (Ste), glycyrrhizinic acid (GA), crude trilobatin (CT), and crude rubusoside (CR)) against α-glucosidase and α-amylase and their interactions were evaluated in vitro using enzyme kinetics, fluorescence spectroscopy, Fourier infrared spectroscopy, and molecular docking. The inhibitor sequence was CT > GA > Ste, as GA competitively inhibited α-glycosidase activity while CT and Ste exhibited mixed inhibitory effects. Compared to a positive control acarbose, the inhibitory activity of CT was higher. For α-amylase, the mixed inhibitors CT, CR, and Mog and the competitive inhibitor Ste effectively inhibited the enzyme, with the following order: CT > CR > Ste > Mog; nevertheless, the inhibitors were slightly inferior to acarbose. Three-dimensional fluorescence spectra depicted that GA, CT, and CR bound to the hydrophobic cavity of α-glucosidase or α-amylase and changed the polarity of the hydrophobic amino acid-based microenvironment and structure of the polypeptide chain backbone. Infrared spectroscopy revealed that GA, CT, and CR could disrupt the secondary structure of α-glucosidase or α-amylase, which decreased enzyme activity. GA, trilobatin and rubusoside bound to amino acid residues through hydrogen bonds and hydrophobic interactions, changing the conformation of enzyme molecules to decrease the enzymatic activity. Thus, CT, CR and GA exhibit promising inhibitory effects against α-glucosidase and α-amylase.
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Affiliation(s)
- Jiequn Jiang
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Heliang Fan
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Jie Zhou
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Jingkai Qin
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Zhongyi Qin
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Mei Chen
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Yuanyuan Shen
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Xiaoling Liu
- College of Light and Food Engineering, Guangxi University, Nanning 530004, China.
- Key Laboratory of Deep Processing and Safety Control for Specialty Agricultural Products in Guangxi Universities, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
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Li H, Yang J, Wang M, Ma X, Peng X. Studies on the inhibition of α-glucosidase by biflavonoids and their interaction mechanisms. Food Chem 2023; 420:136113. [PMID: 37054519 DOI: 10.1016/j.foodchem.2023.136113] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/15/2023]
Abstract
Biflavonoids are a kind of polyphenol compounds with numerous biological functions. However, the potential inhibitory activities of biflavonoids on α-glucosidase are yet unknown. Here, the inhibitory effects of two biflavonoids (amentoflavone and hinokiflavone) on α-glucosidase and their interaction mechanisms were explored using multispectral approaches and molecular docking. The results showed that the inhibitory activities of biflavonoids were much better compared with monoflavonoid (apigenin) and acarbose, and the order of inhibition ability was hinokiflavone > amentoflavone > apigenin > acarbose. These flavonoids were noncompetitive inhibitors of α-glucosidase and showed synergistic inhibition effects with acarbose. Additionally, they could statically quench the intrinsic fluorescence of α-glucosidase, and form the non-covalent complexes with enzyme primarily through hydrogen bonds and van der Waals forces. The binding of flavonoids changed the conformational structure of α-glucosidase, therefore impairing the enzyme activity. The findings suggested that biflavonoids could be considered as potential hypoglycemic functional foods in diabetes therapy.
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Affiliation(s)
- Huan Li
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
| | - Jichen Yang
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
| | - Mengfan Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China.
| | - Xiangzhao Ma
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
| | - Xin Peng
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China; Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, Hainan 571158, PR China; State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, PR China.
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Shen H, Wang J, Ao J, Cai Y, Xi M, Hou Y, Li M, Luo A. Inhibitory kinetics and mechanism of active compounds in green walnut husk against α-glucosidase: Spectroscopy and molecular docking analyses. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Ren Y, Liu T, Liu H, Zhu Y, Qi X, Liu X, Zhao Y, Wu Y, Zhang N, Liu M. Functional improvement of (−)-epicatechin gallate and piceatannol through combined binding to β-lactoglobulin: Enhanced effect of heat treatment and nanoencapsulation. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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