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El Jemli M, Ezzat SM, Kharbach M, Mostafa ES, Radwan RA, El Jemli Y, El-Guourrami O, Ahid S, Cherrah Y, Zayed A, Alaoui K. Bioassay-guided isolation of anti-inflammatory and antinociceptive metabolites among three Moroccan Juniperus leaves extract supported with in vitro enzyme inhibitory assays. JOURNAL OF ETHNOPHARMACOLOGY 2024; 331:118285. [PMID: 38703873 DOI: 10.1016/j.jep.2024.118285] [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: 03/18/2024] [Revised: 04/28/2024] [Accepted: 05/01/2024] [Indexed: 05/06/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Herbs of the genus Juniperus (family Cupressaceae) have been commonly used in ancestral folk medicine known as "Al'Araar" for treatment of rheumatism, diabetes, inflammation, pain, and fever. Bioassay-guided isolation of bioactives from medicinal plants is recognized as a potential approach for the discovery of novel drug candidates. In particular, non-addictive painkillers are of special interest among herbal phytochemicals. AIM OF THE STUDY The current study aimed to assess the safety of J. thurifera, J. phoenicea, and J. oxycedrus aqueous extracts in oral treatments; validating the traditionally reported anti-inflammatory and analgesic effects. Further phytochemical investigations, especially for the most bioactive species, may lead to isolation of bioactive metabolites responsible for such bioactivities supported with in vitro enzyme inhibition assays. MATERIALS AND METHODS Firstly, the acute toxicity study was investigated following the OECD Guidelines. Then, the antinociceptive, and anti-inflammatory bioactivities were evaluated based on chemical and mechanical trauma assays and investigated their underlying mechanisms. The most active J. thurifera n-butanol fraction was subjected to chromatographic studies for isolating the major anti-inflammatory metabolites. Moreover, several enzymatic inhibition assays (e.g., 5-lipoxygenase, protease, elastase, collagenase, and tyrosinase) were assessed for the crude extracts and isolated compounds. RESULTS The results showed that acute oral administration of the extracts (300-500 mg/kg, p. o.) inhibited both mechanically and chemically triggered inflammatory edema in mice (up to 70% in case of J. thurifera) with a dose-dependent antinociceptive (tail flick) and anti-inflammatory pain (formalin assay) activities. This effect was partially mediated by naloxone inhibition of the opioid receptor (2 mg/kg, i. p.). In addition, 3-methoxy gallic acid (1), quercetin (2), kaempferol (3), and ellagic acid (4) were successfully identified being involved most likely in J. thurifera extract bioactivities. Nevertheless, quercetin was found to be the most potent against 5-LOX, tyrosinase, and protease with IC50 of 1.52 ± 0.01, 192.90 ± 6.20, and 399 ± 9.05 μM, respectively. CONCLUSION J. thurifera extract with its major metabolites are prospective drug candidates for inflammatory pain supported with inhibition of inflammatory enzymes. Interestingly, antagonism of opioid and non-opioid receptors is potentially involved.
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Affiliation(s)
- Meryem El Jemli
- Pharmacology and Toxicology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco; Faculty of Pharmacy, Mohammed VI University of Health Sciences, Casablanca, Morocco
| | - Shahira M Ezzat
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, 11562, Egypt; Pharmacognosy Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 6th October 12451, Egypt.
| | - Mourad Kharbach
- Pharmacology and Toxicology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco; Circular Economy/Sustainable Solutions, LAB University of Applied Sciences, Mukkulankatu 19, 15101 Lahti, Finland
| | - Eman Sherien Mostafa
- Pharmacognosy Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 6th October 12451, Egypt
| | - Rasha Ali Radwan
- Biochemistry Department, Faculty of Biotechnology, German International University (GIU), Regional Ring Road, East Cairo, New Administrative Capital, Egypt
| | | | - Otman El-Guourrami
- Pharmacology and Toxicology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - Samir Ahid
- Pharmacology and Toxicology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco; Faculty of Pharmacy, Mohammed VI University of Health Sciences, Casablanca, Morocco
| | - Yahia Cherrah
- Pharmacology and Toxicology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - Ahmed Zayed
- Department of Pharmacognosy, Faculty of Pharmacy, Tanta University, El Guish Street, Medical Campus, 31527, Tanta, Egypt
| | - Katim Alaoui
- Pharmacology and Toxicology Laboratory, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
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Ethier R, Krishnamurthy A, Jeffrey M, Tompkins TA. Profiling of Metabolites in a Fermented Soy Dietary Supplement Reinforces its Role in the Management of Intestinal Inflammation. Mol Nutr Food Res 2024; 68:e2300770. [PMID: 38522032 DOI: 10.1002/mnfr.202300770] [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: 10/31/2023] [Revised: 02/19/2024] [Indexed: 03/25/2024]
Abstract
SCOPE Gastro-AD (GAD) is a soy flour derived product that undergoes an industrial fermentation with Lactobacillus delbrueckii R0187 and has demonstrated clinical effects in gastroesophageal reflux and peptic ulcer symptom resolution. The aim of this study is to describe and link GAD's metabolomic profile to plausible mechanisms that manifest and explain the documented clinical outcomes. METHODS AND RESULTS 1H NMR spectroscopy with multivariate statistical analysis is used to characterize the prefermented soy flour and GAD products. The acquired spectra are screened using various resources and the molecular assignments are confirmed using total correlation spectroscopy (TOCSY). Peaks corresponding to different metabolites are integrated and compared between the two products for relative changes. HPLC and GC are used to quantify some specific molecules. NMR analyses demonstrate significant changes in the composition of various assigned bioactive moieties. HPLC and GC analysis demonstrate deglycation of isoflavones after fermentation, resulting in estrogenically active secondary metabolites that have been previously shown to help to reduce inflammation. CONCLUSION The identification of bioactive molecules, such as genistein and SCFAs, capable of modulating anti-inflammatory signaling cascades in the stomach's gastric and neuroendocrine tissues can explain the reported biological effects in GAD and is supported by in vivo data.
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Affiliation(s)
- Richard Ethier
- Richard Ethier Consulting, Montreal, Quebec, H4C 2J9, Canada
| | - Arun Krishnamurthy
- Purity-IQ Inc., Suite# 102, 150 Research Lane, Guelph, Ontario, N1G 4T2, Canada
| | - Michael Jeffrey
- Faculty of Science, Engineering & Information Technology, Durham College, Oshawa, Ontario, L1G 0C5, Canada
| | - Thomas A Tompkins
- Lallemand Bio-Ingredients, 1620 rue Prefontaine, Montreal, Quebec, H1W 2N8, Canada
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Li WY, Liu JY, Wang ZX, Wang KY, Huang CX, He W, Song JL. Sinapic Acid Attenuates Chronic DSS-Induced Intestinal Fibrosis in C57BL/6J Mice by Modulating NLRP3 Inflammasome Activation and the Autophagy Pathway. ACS OMEGA 2024; 9:1230-1241. [PMID: 38222654 PMCID: PMC10785090 DOI: 10.1021/acsomega.3c07474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/23/2023] [Accepted: 12/06/2023] [Indexed: 01/16/2024]
Abstract
Ulcerative colitis (UC) is a chronic gastrointestinal disease that results from repeated inflammation and serious complications. Sinapic acid (SA) is a hydroxycinnamic acid present in a variety of plants that has antioxidant, anti-inflammatory, anticancer, and other protective effects. This study investigated the antifibrotic effect of SA on chronic colitis induced by dextran sulfate sodium salt (DSS) in mice. We observed that SA could significantly reduce clinical symptoms (such as improved body weight loss, increased colon length, and decreased disease activity index score) and pathological changes in mice with chronic colitis. SA supplementation has been demonstrated to repair intestinal mucosal barrier function and maintain epithelial homeostasis by inhibiting activation of the NLRP3 inflammasome and decreasing the expression of IL-6, TNF-α, IL-17A, IL-18, and IL-1β. Furthermore, SA could induce the expression of antioxidant enzymes (Cat, Sod1, Sod2, Mgst1) by activating the Nrf2/keap1 pathway, thus improving antioxidant capacity. Additionally, SA could increase the protein expression of downstream LC3-II/LC3-I and Beclin1 and induce autophagy by regulating the AMPK-Akt/mTOR signaling pathway, thereby reducing the production of intestinal fibrosis-associated proteins Collagen-I and α-SMA. These findings suggest that SA can enhance intestinal antioxidant enzymes, reduce oxidative stress, expedite intestinal epithelial repair, and promote autophagy, thereby ameliorating DSS-induced colitis and intestinal fibrosis.
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Affiliation(s)
- Wan-Ying Li
- Department
of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin 541100, Guangxi, China
- Department
of Clinical Nutrition, Liuzhou People’s
Hospital, Liuzhou 545006, Guangxi, China
| | - Jun-Yang Liu
- Department
of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin 541100, Guangxi, China
| | - Zi-Xian Wang
- Department
of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin 541100, Guangxi, China
| | - Ke-Ying Wang
- Department
of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin 541100, Guangxi, China
| | - Chun-Xiang Huang
- Department
of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin 541100, Guangxi, China
| | - Wen He
- Guangxi
Key Laboratory of Environmental Exposureomics and Entire Lifecycle
Health, Guilin Medical University, Guilin 541100, Guangxi, China
| | - Jia-Le Song
- Department
of Nutrition and Food Hygiene, School of Public Health, Guilin Medical University, Guilin 541100, Guangxi, China
- Guangxi
Key Laboratory of Environmental Exposureomics and Entire Lifecycle
Health, Guilin Medical University, Guilin 541100, Guangxi, China
- Department
of Clinical Nutrition and Obstetrics, The
Second Affiliated Hospital of Guilin Medical University, Guilin 541199, Guangxi, China
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Lian YZ, Liu YC, Chang CC, Nochi T, Chao JCJ. Combined Lycium barbarum Polysaccharides with Plasmon-Activated Water Affect IFN-γ/TNF-α Induced Inflammation in Caco-2 Cells. Pharmaceuticals (Basel) 2023; 16:1455. [PMID: 37895926 PMCID: PMC10610401 DOI: 10.3390/ph16101455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/05/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
The effects of Lycium barbarum polysaccharides (LBP) and plasmon-activated water (PAW) against IFN-γ/TNF-α induced inflammation in human colon Caco-2 cells were investigated. Cells were divided into the control, induction, LBP treatment (100-500 μg/mL), and combination groups with PAW. Inflammation was induced 24 h with 10 ng/mL IFN-γ when cell confluency reached >90%, and various doses of LBP with or without PAW were treated for 3 h, and subsequently 50 ng/mL TNF-α was added for another 24 h to provoke inflammation. Combination of LBP with PAW significantly decreased the secretion of IL-6 and IL-8. Cyclooxygenase-2 and inducible NO synthase expression was attenuated in all LBP-treated groups with or without PAW. NLRP3 inflammasome and related protein PYCARD expression were inhibited by LBP at the highest dose (500 μg/mL). All doses of LBP alone significantly decreased p-ERK expression, but combination with PAW increased p-ERK expression compared to those without PAW. Additionally, 250 and 500 μg/mL of LBP with or without PAW inhibited procaspase-3/caspase-3 expression. Therefore, LBP possesses anti-inflammation and anti-apoptosis by inhibiting the secretion of inflammatory cytokines and the expression of NLRP3 inflammasome-related protein. The combination with PAW exerts additive or synergistic effect on anti-inflammation.
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Affiliation(s)
- Yu Zhi Lian
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110301, Taiwan;
| | - Yu-Chuan Liu
- Department of Biochemistry and Molecular Cell Biology, School of Medicine, Taipei Medical University, Taipei 110301, Taiwan;
- Cell Physiology and Molecular Image Research Center, Taipei Municipal Wan Fang Hospital, Taipei Medical University, Taipei 110301, Taiwan
| | - Chun-Chao Chang
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei 110301, Taiwan;
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine, Taipei Medical University, Taipei 110301, Taiwan
- TMU Research Center for Digestive Medicine, Taipei Medical University, Taipei 110301, Taiwan
| | - Tomonori Nochi
- Laboratory of Functional Morphology, Graduate School of Agricultural Science, Tohoku University, Sendai 980-8577, Japan;
- International Education and Research Center for Food and Agricultural Immunology, Graduate School of Agricultural Science, Tohoku University, Sendai 980-8577, Japan
| | - Jane C.-J. Chao
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 110301, Taiwan;
- TMU Research Center for Digestive Medicine, Taipei Medical University, Taipei 110301, Taiwan
- Master Program in Global Health and Health Security, Taipei Medical University, Taipei 110301, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 110301, Taiwan
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Kusumah J, Castañeda-Reyes ED, Bringe NA, Gonzalez de Mejia E. Soybean ( Glycine max) INFOGEST Colonic Digests Attenuated Inflammatory Responses Based on Protein Profiles of Different Varieties. Int J Mol Sci 2023; 24:12396. [PMID: 37569771 PMCID: PMC10418973 DOI: 10.3390/ijms241512396] [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: 07/04/2023] [Revised: 07/21/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
Soybean compounds have been established to modulate inflammation, but less is known about how whole soybean compositions work together after digestion. The objective was to evaluate and compare the anti-inflammatory responses of different soybean varieties under simulated gastrointestinal digestion, with additional consideration of the glycinin:β-conglycinin ratio (GBR). Soybean colonic digests (SCD) inhibited cyclooxygenase (COX)-2 (25-82%), 5-lipoxidase (LOX) (18-35%), and inducible nitric oxide (iNOS) (8-61%). Varieties 88, GN3, and 93 were the most effective inhibitors. SCD (1 mg/mL) of varieties 81 and GN1 significantly (p < 0.05) reduced nitrite production by 44 and 47%, respectively, compared to lipopolysaccharide (LPS)-stimulated macrophages. SCD effectively reduced pro-inflammatory cytokine interleukin (IL)-6 (50 and 80% for 96 and GN1, respectively). Western blot results showed a decrease in the expression of iNOS, p65, and p50. The GBR was in the range of 0.05-1.57. Higher ratio correlated with higher production of IL-1β (r = 0.44) and tumor necrosis factor-alpha (TNF-α, r = 0.56). Inflammatory microarray results showed a significant decrease in expression of markers granulocyte-macrophage colony-stimulating factor (GM-CSF) and IL-6 in cells treated with GN1 SCD compared to LPS. The results suggested that SCD exerted its anti-inflammatory potential through nuclear factor kappa B (NF-κΒ) pathway inhibition by decreasing the levels of NF-κB-dependent cytokines and subunits, and inhibition of pro-inflammatory enzyme activity.
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Affiliation(s)
- Jennifer Kusumah
- 228 Edward R Madigan Lab, Department Food Science, and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; (J.K.); (E.D.C.-R.)
| | - Erick Damian Castañeda-Reyes
- 228 Edward R Madigan Lab, Department Food Science, and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; (J.K.); (E.D.C.-R.)
| | | | - Elvira Gonzalez de Mejia
- 228 Edward R Madigan Lab, Department Food Science, and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; (J.K.); (E.D.C.-R.)
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Ghasemi‐Dehnoo M, Lorigooini Z, Amini‐Khoei H, Sabzevary‐Ghahfarokhi M, Rafieian‐Kopaei M. Quinic acid ameliorates ulcerative colitis in rats, through the inhibition of two TLR4-NF-κB and NF-κB-INOS-NO signaling pathways. Immun Inflamm Dis 2023; 11:e926. [PMID: 37647443 PMCID: PMC10408368 DOI: 10.1002/iid3.926] [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: 03/15/2023] [Revised: 05/11/2023] [Accepted: 06/15/2023] [Indexed: 08/29/2023] Open
Abstract
OBJECTIVE In this study, the therapeutic effect of quinic acid (QA), which has anti-inflammatory activity, was investigated on acetic acid-induced colitis in male Wistar rats. METHODS Ulcerative colitis (UC) was induced in rats by acetic acid intrarectally, and the protective effects of QA in 10, 30, 60, and 100 mg/kg doses were investigated. Rats were treated for 5 days and their colon tissues were dissected out at the end. Macroscopic and histopathological examinations were performed in colon tissues. Also, the expression of inflammatory and apoptotic genes, including TLR4, IL-1β, INOS, IL-6, TNF-α, NF-κB, Caspase-3, Caspase-8, Bax, and Bcl-2, was measured. Biochemistry indices, such as malondialdehyde (MDA) and nitrite oxide (NO) content, in addition to, total antioxidant capacity (TAC), superoxide dismutase (SOD), catalase (CAT), and enzymes activities were also assessed. RESULTS Colitis increased the levels of MDA and NO, and enhanced the inflammatory and apoptotic gene expressions, while reducing the SOD and CAT enzymes activity, and TAC levels in the colitis rats. Also, results showed that colitis was associated with the infiltration of inflammatory cells, epithelium damage, and edema in colon tissue. QA significantly ameliorated histopathological indices, oxidative stress, inflammation, and apoptosis in colitis rats. CONCLUSION QA ameliorated UC through the inhibition of two TLR4-NF-κB and NF-κB-INOS-NO signaling pathways, which results in the reduction of colitis complications, including oxidative stress, inflammation, apoptosis and histopathological injuries in rats. Therefore it can be concluded, that QA exerts its therapeutic effects through antiapoptotic, antioxidant, and anti-inflammatory properties.
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Affiliation(s)
- Maryam Ghasemi‐Dehnoo
- Medical Plants Research Center, Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran
| | - Zahra Lorigooini
- Medical Plants Research Center, Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran
| | - Hossein Amini‐Khoei
- Medical Plants Research Center, Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran
| | - Milad Sabzevary‐Ghahfarokhi
- Medical Plants Research Center, Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran
| | - Mahmoud Rafieian‐Kopaei
- Medical Plants Research Center, Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran
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Zhang Y, Liu R, Feng Q, Li H, Li Y, Liu X. Insulin-Loaded Soybean Trypsin Inhibitor-Chitosan Nanoparticles: Preparation, Characterization, and Protective Effect Evaluation. Polymers (Basel) 2023; 15:2648. [PMID: 37376294 DOI: 10.3390/polym15122648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
The aim of this work was to prepare insulin-loaded nanoparticles using soybean trypsin inhibitor (STI) and chitosan (CS) as a potential coating. The nanoparticles were prepared by complex coacervation, and characterized for their particle size, polydispersity index (PDI), and encapsulation efficiency. In addition, the insulin release and enzymatic degradation of nanoparticles in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) were evaluated. The results showed that the optimal conditions for preparing insulin-loaded soybean trypsin inhibitor-chitosan (INs-STI-CS) nanoparticles were as follows: CS concentration of 2.0 mg/mL, STI concentration of 1.0 mg/mL, and pH 6.0. The INs-STI-CS nanoparticles prepared at this condition had a high insulin encapsulation efficiency of 85.07%, the particle diameter size was 350 ± 5 nm, and the PDI value was 0.13. The results of the in vitro evaluation of simulated gastrointestinal digestion showed that the prepared nanoparticles could improve the stability of insulin in the gastrointestinal tract. Compared with free insulin, the insulin loaded in INs-STI-CS nanoparticles was retained at 27.71% after 10 h of digestion in the intestinal tract, while free insulin was completely digested. These findings will provide a theoretical basis for improving the stability of oral insulin in the gastrointestinal tract.
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Affiliation(s)
- Yihao Zhang
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - Ruijia Liu
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - Qixu Feng
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - He Li
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - You Li
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - Xinqi Liu
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
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Zhang Y, Liu R, Li H, Li Y, Liu X. Interactions between Soybean Trypsin Inhibitor and Chitosan in an Aqueous Solution. Polymers (Basel) 2023; 15:polym15071594. [PMID: 37050206 PMCID: PMC10097168 DOI: 10.3390/polym15071594] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/17/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
Supramolecular structures obtained from protein-polysaccharide association may be applied to encapsulate bioactive compounds or to improve the physical stability and texture properties of colloid-based products. In this study, the interaction of 0.1 wt% soybean trypsin inhibitor (STI) with different concentrations of chitosan (CS) in aqueous solutions was investigated under different pH by the analysis of state diagram, turbidity, zeta potential, spectroscopy, and microstructure; the protective effect of STI-CS complex coacervates on STI stability in simulated gastric juice was also discussed. The results suggested that interactions between STI and CS could form soluble/insoluble complexes mainly through hydrophobic interactions (pH 4.0) or electrostatic interactions (pH 6.0). The CD spectra showed that the secondary structure of STI did not change significantly when CS with the same charge was mixed with STI, and the secondary structure of STI was slightly changed when CS with the opposite charge was mixed with STI. Simulated gastric digestion experiments showed that the complex formed by non-covalent bonding had a protective effect on the active protein. This study provides information about the effect of different CS concentrations and pH values on the formation of complexes of CS and STI in an aqueous solution and provides theoretical references for the construction of supramolecular-structured carrier substances based on CS and STI.
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Affiliation(s)
- Yihao Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - Ruijia Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - He Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - You Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
| | - Xinqi Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, National Soybean Processing Industry Technology Innovation Center, Beijing Technology and Business University, Beijing 100048, China
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