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Liu C, Wu Y, Jin G, Xu B, Mei L. Structural modifications and augmented affinity for bile salts in enzymatically denatured egg white. Food Chem X 2024; 23:101577. [PMID: 39036479 PMCID: PMC11260010 DOI: 10.1016/j.fochx.2024.101577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/06/2024] [Accepted: 06/17/2024] [Indexed: 07/23/2024] Open
Abstract
Protein binding to bile salts (BSs) reduces cholesterol levels, but the exact mechanism is unclear. In this study, we performed simulated gastrointestinal digestion of egg white protein hydrolysate (EWPHs) and included an unenzyme digestion group (CK) to investigate the changes in BSs binding capacity before and after digestion, as well as the relationship between egg white protein (EWP) structure and BSs binding capacity. In addition, peptidomics and molecular docking were used to clarify EWP's binding mechanism. We found that the BSs binding ability of EWPHs was slightly decreased after digestion, but significantly higher than that of the CK group and the digested CK group (D-CK). Particle size analysis and electrophoresis demonstrated that smaller particles and lower molecular weights exhibited enhanced binding capacity to BSs. Fourier Transform infrared spectroscopy (FTIR) results revealed that a disordered structure favored BS binding ability enhancement. Peptides FVLPM and GGGVW displayed hypocholesterolemic efficacy.
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Affiliation(s)
- Chunjie Liu
- College of Tea and Food Science, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Yating Wu
- College of Tea and Food Science, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Guoguo Jin
- College of Tea and Food Science, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Baocai Xu
- College of Tea and Food Science, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
| | - Lin Mei
- College of Tea and Food Science, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
- Key Laboratory of Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China
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Ge H, Qi F, Shen Z, Wang H, Zhu S, Zhou S, Xie Z, Li D. Large-leaf yellow tea protein derived-peptides alleviated dextran sodium sulfate-induced acute colitis and restored intestinal microbiota balance in C57BL/6 J mice. Food Chem 2024; 456:139936. [PMID: 38865822 DOI: 10.1016/j.foodchem.2024.139936] [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: 03/17/2024] [Revised: 05/25/2024] [Accepted: 05/30/2024] [Indexed: 06/14/2024]
Abstract
Large-leaf yellow tea (LYT)-derived peptides (TPP) are rich in amino acids required for damage repair, such as Glu, Arg, and Pro, and can be used to alleviate acute colitis. However, its effect and mechanisms against colitis remain unclear. This study utilized TPP to intervene in dextran sodium sulfate-induced acute colitis in C57BL/6 J mice. Results confirmed that TPP ameliorated acute colitis symptoms by inhibiting pro-inflammatory cytokines, restoring gut microbiota dysbiosis, particularly by increasing the abundance of beneficial bacteria Akkermansia and Lactobacillus while declining harmful microbiota Escherichia-Shigella. Besides, TPP intervention reshaped the gut microbiota phenotype by increasing the aerobic phenotype and reducing the potentially pathogenic phenotype. Levels of short-chain fatty acids, including acetic acid, propanoic acid, isobutyric acid, and butyric acid, were also enhanced in a dose-dependent manner to help restore gut microbiota equilibrium. This study supports using TPP as a viable plant protein-derived dietary resource for alleviating inflammatory bowel disease.
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Affiliation(s)
- Huifang Ge
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China; Joint Research Center for Food Nutrition and Health of IHM, Hefei, Anhui 230036, People's Republic of China
| | - Fengxue Qi
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Ziyi Shen
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Hongyan Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China; Joint Research Center for Food Nutrition and Health of IHM, Hefei, Anhui 230036, People's Republic of China
| | - Shangliang Zhu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Simeng Zhou
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China; Joint Research Center for Food Nutrition and Health of IHM, Hefei, Anhui 230036, People's Republic of China.
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China; Joint Research Center for Food Nutrition and Health of IHM, Hefei, Anhui 230036, People's Republic of China.
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Quan S, Wen M, Xu P, Chu C, Zhang H, Yang K, Tong S. Efficient screening of pancreatic lipase inhibitors from Rheum palmatum by affinity ultrafiltration-high-performance liquid chromatography combined with high-resolution inhibition profiling. PHYTOCHEMICAL ANALYSIS : PCA 2024; 35:540-551. [PMID: 38053479 DOI: 10.1002/pca.3311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 12/07/2023]
Abstract
INTRODUCTION Pancreatic lipase is one of the most important key targets in the treatment of obesity. Inhibition of pancreatic lipase can effectively reduce lipid absorption and treat obesity and other related metabolic disorders. OBJECTIVES The goal of this study is the efficient screening of pancreatic lipase inhibitors in the root and rhizome of Rheum palmatum using affinity ultrafiltration-high-performance liquid chromatography (AUF-HPLC) combined with high-resolution inhibition profiling (HRIP). METHODS Potential pancreatic lipase ligands and pancreatic lipase inhibitors in ethyl acetate fraction of R. palmatum were screened using AUF-HPLC and HRIP, respectively. All screened compounds were identified by HPLC- quadrupole time-of-flight (Q-TOF)/MS. Eight compounds were screened out by both AUF-HPLC and HRIP, and six compounds were screened out by either AUF-HPLC or HRIP alone. The pancreatic lipase inhibitory activities of all screened compounds were verified by enzyme inhibition assay and molecular docking. RESULTS Five new potent pancreatic lipase inhibitors were discovered, namely procyanidin B5 3,3'-di-O-gallate (IC50 = 0.06 ± 0.01 μM), 1,6-di-O-galloyl-2-O-cinnamoyl-β-D-glucoside (IC50 = 12.83 ± 0.67 μM), 1-O-(1,3,5-trihydroxy)phenyl-2-O-galloyl-6-O-cinnamoyl-β-D-glucoside (IC50 = 17.84 ± 1.33 μM), 1,2-di-O-galloyl-6-O-cinnamoyl-β-D-glucoside (IC50 = 18.39 ± 1.52 μM), and 4-(4'-hydroxyphenyl)-2-butanone-4'-O-β-D-(2"-O-galloyl-6"-O-cinnamoyl)-glucoside (IC50 = 2.91 ± 0.40 μM). It was found that procyanidin B5 3,3'-di-O-gallate showed higher pancreatic lipase inhibitory activity than the positive control orlistat (IC50 = 0.12 ± 0.02 μM). CONCLUSION The combination of affinity ultrafiltration-high-performance liquid chromatography (AUF-HPLC) and high-resolution inhibition profiling (HRIP) could reduce the risk of false-negative screening and missed screening and could achieve more efficient screening of bioactive compounds in complex natural products.
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Affiliation(s)
- Sihua Quan
- College of Pharmaceutical Science, Zhejiang University of Technology, Huzhou, China
| | - Mengyi Wen
- College of Pharmaceutical Science, Zhejiang University of Technology, Huzhou, China
| | - Ping Xu
- College of Pharmaceutical Science, Zhejiang University of Technology, Huzhou, China
| | - Chu Chu
- College of Pharmaceutical Science, Zhejiang University of Technology, Huzhou, China
| | - Hui Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Huzhou, China
| | - Kai Yang
- College of Food Science and Engineering, Zhejiang University of Technology, Huzhou, China
| | - Shengqiang Tong
- College of Pharmaceutical Science, Zhejiang University of Technology, Huzhou, China
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Zhang ZQ, Ren XR, Geng J, Chen SC, Wang QL, Liu CQ, Xiao JH, Huang DW. Identification, characterization and hypolipidemic effect of novel peptides in protein hydrolysate from Protaetia brevitarsis larvae. Food Res Int 2024; 176:113813. [PMID: 38163717 DOI: 10.1016/j.foodres.2023.113813] [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: 08/30/2023] [Revised: 11/29/2023] [Accepted: 12/02/2023] [Indexed: 01/03/2024]
Abstract
The proteins were mainly derived from Protaetia brevitarsis larval extracts obtained using two empty intestine methods (traditional static method: TSM or salt immersion stress method: SISM) and extraction solvents (water: W or 50 % water-ethanol: W:E), and the proteins were used as objects to investigate the effect of emptying intestine methods on hypolipidemic peptides. The results revealed that the F-2 fractions of protein hydrolysate had stronger in vitro hypolipidemic activity, with the peptides obtained by SISM possessing a stronger cholesterol micelle solubility inhibition rate, especially in SISM-W:E-P. Moreover, a total of 106 peptides were tentatively identified, among which SISM identified more peptides with an amino acid number < 8. Meanwhile, five novel peptides (YPPFH, YPGFGK, KYPF, SPLPGPR and VPPP) exhibited good hypolipidemic activity in vitro and in vivo, among which YPPFH, VPPP and KYPF had strong inhibitory activities on pancreatic lipase (PL) and cholesteryl esterase (CE), and KYPF, SPLPGPR and VPPP could significantly reduce the TG content in Caenorhabditis elegans. Thus, P. brevitarsis can be developed as a naturally derived hypolipidemic component for the development and application in functional foods.
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Affiliation(s)
- Zong-Qi Zhang
- College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China
| | - Xin-Rui Ren
- College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China
| | - Jin Geng
- College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China
| | - Si-Cong Chen
- College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China
| | - Qing-Lei Wang
- Hebei Key Laboratory of Soil Entomology, Cangzhou Academy of Agriculture and Forestry Sciences, Cangzhou 061001, People's Republic of China
| | - Chun-Qin Liu
- Hebei Key Laboratory of Soil Entomology, Cangzhou Academy of Agriculture and Forestry Sciences, Cangzhou 061001, People's Republic of China
| | - Jin-Hua Xiao
- College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China.
| | - Da-Wei Huang
- College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China.
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Guo J, Wang Y, Li P, Wu W, Xu F, Zhou K, Xu B. The modulatory effects on enterohepatic cholesterol metabolism of novel cholesterol-lowering peptides from gastrointestinal digestion of Xuanwei ham. Food Res Int 2023; 173:113391. [PMID: 37803728 DOI: 10.1016/j.foodres.2023.113391] [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: 07/11/2023] [Revised: 08/13/2023] [Accepted: 08/16/2023] [Indexed: 10/08/2023]
Abstract
The aim of this study was to investigate the effects and mechanism of in vitro protein digestive products of Xuanwei ham with different ripening periods on cholesterol metabolism and hypercholesterolemia. The results showed that compared with other gastrointestinal digestion (GID) groups, the GID group of Xuanwei ham with 3-year ripening period (XWH3-GID) inhibited the expression of Niemann-Pick C1-like 1 (NPC1L1) and acetyl-CoA acetyltransferase 2 (ACAT2) through hepatocyte nuclear factor 1-alpha (HNF-1α), which in turn effectively inhibited cholesterol absorption in Caco-2 cell monolayers. Following absorption by Caco-2 cell monolayers, the XWH3-GID group suppressed the expression and secretion of proprotein convertase subtilisin/kexin type 9 (PCSK9) via HNF-1α, which enhanced the protein expression and fluorescence intensity of low density lipoprotein receptor (LDLR) on the HepG2 cell membrane, and thus promoted the uptake of low density lipoprotein (LDL). Importantly, three novel peptides (LFP, PKF and VPFP) derived from titin were identified after intestinal epithelial transport in the XWH3-GID group, which could exert cholesterol-lowering effects through inhibiting intestinal cholesterol absorption and promoting peripheral hepatic LDL uptake, and effectively ameliorate western diet-induced hypercholesterolemia in ApoE-/- mice. These results suggest that Xuanwei ham with 3-year ripening period can be used as a source of cholesterol-lowering peptides and has potential to intervene in hypercholesterolemia.
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Affiliation(s)
- Jie Guo
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Ying Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Peijun Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Wenda Wu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Feiran Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Kai Zhou
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Baocai Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China.
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Peng H, Yang X, Fang H, Zhang Z, Zhao J, Zhao T, Liu J, Li Y. Simultaneous effect of different chromatographic conditions on the chromatographic retention of pentapeptide derivatives (HGRFG and NPNPT). Front Chem 2023; 11:1171824. [PMID: 37143822 PMCID: PMC10151710 DOI: 10.3389/fchem.2023.1171824] [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: 02/22/2023] [Accepted: 03/29/2023] [Indexed: 05/06/2023] Open
Abstract
Introduction: Oligopeptides exhibit great prospects for clinical application and its separation is of great importance in new drug development. Methods: To accurately predict the retention of pentapeptides with analogous structures in chromatography, the retention times of 57 pentapeptide derivatives in seven buffers at three temperatures and four mobile phase compositions were measured via reversed-phase high-performance liquid chromatography. The parameters ( k H A , k A , and p K a ) of the acid-base equilibrium were obtained by fitting the data corresponding to a sigmoidal function. We then studied the dependence of these parameters on the temperature (T), organic modifier composition (φ, methanol volume fraction), and polarity ( P m N parameter). Finally, we proposed two six-parameter models with (1) pH and T and (2) pH and φ or P m N as the independent variables. These models were validated for their prediction capacities by linearly fitting the predicted retention factor k-value and the experimental k-value. Results: The results showed that log k H A and log k A exhibited linear relationships with 1 / T , φ or P m N for all pentapeptides, especially for the acid pentapeptides. In the model of pH and T, the correlation coefficient (R2) of the acid pentapeptides was 0.8603, suggesting a certain prediction capability of chromatographic retention. Moreover, in the model of pH and φ or P m N , the R2 values of the acid and neutral pentapeptides were greater than 0.93, and the average root mean squared error was approximately 0.3, indicating that the k-values could be effectively predicted. Discussion: In summary, the two six-parameter models were appropriate to characterize the chromatographic retention of amphoteric compounds, especially the acid or neutral pentapeptides, and could predict the chromatographic retention of pentapeptide compounds.
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Affiliation(s)
- Huan Peng
- Center for Brain Science, The First Affiliated Hospital of Xi’ an Jiaotong University, Xi’an, Shaanxi, China
- College of Life Science, Northwest University, Xi’an, Shaanxi, China
| | - Xiangrong Yang
- College of Life Science, Northwest University, Xi’an, Shaanxi, China
- Kangya of Ningxia Pharmaceutical Co., Ltd., Yinchuan, China
| | - Huanle Fang
- Medical College, Peihua University, Xi’an, Shaanxi, China
| | - Zhongqi Zhang
- Department of Polypeptide Engineering, Active Protein and Polypeptide Engineering Center of Xi’an Hui Kang, Xi’an, Shaanxi, China
| | - Jinli Zhao
- Department of Polypeptide Engineering, Active Protein and Polypeptide Engineering Center of Xi’an Hui Kang, Xi’an, Shaanxi, China
| | - Te Zhao
- College of Electronic Engineering, Xidian University, Xi’an, Shaanxi, China
| | - Jianli Liu
- College of Life Science, Northwest University, Xi’an, Shaanxi, China
- Medical College, Peihua University, Xi’an, Shaanxi, China
- *Correspondence: Yan Li, ; Jianli Liu,
| | - Yan Li
- Center for Brain Science, The First Affiliated Hospital of Xi’ an Jiaotong University, Xi’an, Shaanxi, China
- *Correspondence: Yan Li, ; Jianli Liu,
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