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Yang W, Gao X, Lin J, Liu L, Peng L, Sheng J, Xu K, Tian Y. Water-insoluble dietary fiber from walnut relieves constipation through Limosilactobacillus reuteri-mediated serotonergic synapse and neuroactive ligand-receptor pathways. Int J Biol Macromol 2024; 283:137931. [PMID: 39579820 DOI: 10.1016/j.ijbiomac.2024.137931] [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: 05/25/2024] [Revised: 11/04/2024] [Accepted: 11/20/2024] [Indexed: 11/25/2024]
Abstract
Dietary fiber can alleviate functional constipation (FC) by modulating the gut microbiota. To clarify the prebiotic properties of walnut insoluble dietary fiber (WIDF), we explored its structural characteristics and laxative mechanism. A galacturonic acid and glucose-rich WIDF was isolated from walnuts by using a complex enzymatic method. Animal experiments results showed that WIDF could effectively alleviate the symptoms of loperamide-induced FC in mice, including shortening the defecation time, increasing the wet weight and water content of feces, and promoting intestinal motility. WIDF might alleviate FC through activating serotonergic synapse and inhibiting the delta-opioid receptor/inducible nitric oxide synthase (Oprd/iNOS) pathways. Importantly, WIDF treatment altered the structure and composition of the gut microbiota. Correlation analysis revealed that Bacillus and its dominant ASV17, which is considered to be the key microbe for constipation alleviation, were strongly associated with constipation phenotypes. Based on pure culture and 16S rRNA gene phylogenetic analysis, Limosilactobacillus reuteri (L. reuteri), which is 100 % similar to ASV17, was isolated and identified from the feces of WIDF-treated mice. L. reuteri relieved FC by modulating serotonergic synapse and the Oprd/iNOS pathways. These results suggested that WIDF and L. reuteri treatment is a prospective strategy for the prevention of constipation.
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Affiliation(s)
- Weixing Yang
- Yunnan Key Laboratory of Precision Nutrition and Personalized Food Manufacturing, Yunnan Agricultural University, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Xiaoyu Gao
- Yunnan Key Laboratory of Precision Nutrition and Personalized Food Manufacturing, Yunnan Agricultural University, Kunming 650201, China; College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China; Engineering Research Center of Development and Utilization of Food and Drug Homologous Resources, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
| | - Jialong Lin
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Li Liu
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Lei Peng
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Jun Sheng
- Engineering Research Center of Development and Utilization of Food and Drug Homologous Resources, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China
| | - Kunlong Xu
- Yunnan Agricultural University, Kunming 650201, China.
| | - Yang Tian
- Yunnan Key Laboratory of Precision Nutrition and Personalized Food Manufacturing, Yunnan Agricultural University, Kunming 650201, China; Engineering Research Center of Development and Utilization of Food and Drug Homologous Resources, Ministry of Education, Yunnan Agricultural University, Kunming 650201, China; Pu 'er University, Pu 'er 665000, China.
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Xia W, Gao Y, Fang X, Jin L, Liu R, Wang LS, Deng Y, Gao J, Yang H, Wu W, Gao H. Simulated gastrointestinal digestion of walnut protein yields anti-inflammatory peptides. Food Chem 2024; 445:138646. [PMID: 38382250 DOI: 10.1016/j.foodchem.2024.138646] [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: 11/07/2023] [Revised: 01/06/2024] [Accepted: 01/30/2024] [Indexed: 02/23/2024]
Abstract
The impact of the simulated gastrointestinal digestion process on walnut protein and the potential anti-inflammatory properties of its metabolites was studied. Structural changes induced by digestion, notably in α-Helix, β-Turn, and Random Coil configurations, were unveiled. Proteins over 10,000 Da significantly decreased by 35.6 %. Antioxidant activity in these metabolites paralleled increased amino acid content. Molecular docking identified three walnut polypeptides-IPAGTPVYLINR, FQGQLPR, and VVYVLR-with potent anti-inflammatory properties. RMSD and RMSF analysis demonstrated the stable and flexible interaction of these polypeptides with their target proteins. In lipopolysaccharide (LPS)-induced inflammation in normal human colon mucosal epithelial NCM460 cells, these peptides decreased 5-hydroxytryptamine (5-HT), tumor necrosis factor-alpha (TNF-α), and vascular endothelial growth factor (VEGF) expression, while mitigating cell apoptosis and inflammation. Our study offers valuable insights into walnut protein physiology, shedding light on its potential health benefits.
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Affiliation(s)
- Wei Xia
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Yuan Gao
- School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
| | - Xiangjun Fang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Long Jin
- Chacha Food Co., Ltd., Hefei 230061, China
| | - Ruiling Liu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
| | - Li-Shu Wang
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA; Department of Hematology and Hematopoietic Cell Transplantation, Comprehensive, Cancer Center, City of Hope National Medical Center, Duarte, CA, USA
| | - Yangyong Deng
- Hangzhou Yaoshengji Food Co., Ltd., Hangzhou 310052, China
| | - Junlong Gao
- Hangzhou Yaoshengji Food Co., Ltd., Hangzhou 310052, China
| | - Hailong Yang
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China.
| | - Weijie Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Haiyan Gao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
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Osztie R, Czeglédi T, Ross S, Stipsicz B, Kalydi E, Béni S, Boldizsár I, Riethmüller E, Bősze SE, Alberti Á. Comprehensive Characterization of Phytochemical Composition, Membrane Permeability, and Antiproliferative Activity of Juglans nigra Polyphenols. Int J Mol Sci 2024; 25:6930. [PMID: 39000038 PMCID: PMC11241769 DOI: 10.3390/ijms25136930] [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: 05/31/2024] [Revised: 06/20/2024] [Accepted: 06/21/2024] [Indexed: 07/14/2024] Open
Abstract
The aim of our study was the detailed polyphenol profiling of Juglans nigra and the characterization of the membrane permeability and antiproliferative properties of its main phenolics. A total of 161 compounds were tentatively identified in J. nigra bark, leaf, and pericarp extracts by ultrahigh-performance liquid chromatography-high-resolution tandem mass spectrometry (UHPLC-HR-MS/MS). Eight compounds including myricetin-3-O-rhamnoside (86), quercetin-3-O-rhamnoside (106), quercetin-3-O-xyloside (74), juglone (141), 1,2,3,4-tetrahydro-7,8-dihydroxy-4-oxonaphthalen-1-yl-6-O-galloyl-glucoside (92), ellagic acid (143), gallic acid (14), and ethyl gallate (58) were isolated from J. nigra pericarp. The in vitro antiproliferative activity of the isolated compounds was investigated against three human cancer cell lines, confirming that juglone (141) inhibits cell proliferation in all of them, and has similar activity as the clinical standards. The permeability of the isolated compounds across biological membranes was evaluated by the parallel artificial membrane permeability assay (PAMPA). Both juglone (141) and ethyl-gallate (58) showed positive results in the blood-brain-barrier-specific PAMPA-BBB study. Juglone (141) also possesses logPe values which indicates that it may be able to cross both the GI and BBB membranes via passive diffusion.
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Affiliation(s)
- Rita Osztie
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, 1085 Budapest, Hungary; (R.O.); (T.C.); (I.B.); (E.R.)
| | - Tamás Czeglédi
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, 1085 Budapest, Hungary; (R.O.); (T.C.); (I.B.); (E.R.)
| | - Sarah Ross
- Department Pharmaceutical Biology, Institute for Drug Discovery, University of Leipzig, Eilenburger Str. 14, 04317 Leipzig, Germany;
| | - Bence Stipsicz
- Institute of Biology, Doctoral School of Biology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, 1117 Budapest, Hungary;
- HUN-REN-ELTE Research Group of Peptide Chemistry, Hungarian Research Network, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary;
| | - Eszter Kalydi
- Institute of Organic Chemistry, Semmelweis University, Hőgyes Endre u. 7., 1092 Budapest, Hungary;
| | - Szabolcs Béni
- Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary;
| | - Imre Boldizsár
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, 1085 Budapest, Hungary; (R.O.); (T.C.); (I.B.); (E.R.)
- Department of Plant Anatomy, Institute of Biology, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/C, 1117 Budapest, Hungary
| | - Eszter Riethmüller
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, 1085 Budapest, Hungary; (R.O.); (T.C.); (I.B.); (E.R.)
| | - Szilvia E. Bősze
- HUN-REN-ELTE Research Group of Peptide Chemistry, Hungarian Research Network, ELTE Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary;
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary
| | - Ágnes Alberti
- Department of Pharmacognosy, Semmelweis University, Üllői út 26, 1085 Budapest, Hungary; (R.O.); (T.C.); (I.B.); (E.R.)
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