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Qian J, Yu F, Arnold LA, Saha A, Zheng L, Zhao M. Exploring structural features of sleep-enhancing peptides derived from casein hydrolysates by chemometrics and random forest methodology. Food Chem 2024; 461:140838. [PMID: 39167944 DOI: 10.1016/j.foodchem.2024.140838] [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: 05/27/2024] [Revised: 08/01/2024] [Accepted: 08/09/2024] [Indexed: 08/23/2024]
Abstract
Milk casein is regarded as source to release potential sleep-enhancing peptides. Although various casein hydrolysates exhibited sleep-enhancing activity, the underlying reason remains unclear. This study firstly revealed the structural features of potential sleep-enhancing peptides from casein hydrolysates analyzed through peptidomics and multivariate analysis. Additionally, a random forest model and a potential Tyr-based peptide library were established, and then those peptides were quantified to facilitate rapidly-screening. Our findings indicated that YP-, YI/L, and YQ-type peptides with 4-10 amino acids contributed more to higher sleep-enhancing activity of casein hydrolysates, due to their crucial structural features and abundant numbers. Furthermore, three novel strong sleep-enhancing peptides, YQKFPQY, YPFPGPIPN, and YIPIQY were screened, and their activities were validated in vivo. Molecular docking results elucidated the importance of the YP/I/L/Q- structure at the N-terminus of casein peptides in forming crucial hydrogen bond and π-alkyl interactions with His-102 and Asn-60, respectively in the GABAA receptor for activation.
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Affiliation(s)
- Jingjing Qian
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Fengjie Yu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Leggy A Arnold
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, 3210 N. Cramer St., Milwaukee, WI 53211, United States
| | - Arjun Saha
- Department of Chemistry and Biochemistry, Milwaukee Institute for Drug Discovery, University of Wisconsin-Milwaukee, 3210 N. Cramer St., Milwaukee, WI 53211, United States
| | - Lin Zheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China.
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2
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Xiao C, Jia R, Li XG, Zhao M, Liao W, Zhao S, Xu F, Toldrá F. Musculus senhousei peptides alleviated alcoholic liver injury via the gut-liver axis. Food Funct 2024; 15:7124-7135. [PMID: 38881239 DOI: 10.1039/d4fo01070a] [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: 06/18/2024]
Abstract
Alcoholic liver injury has become a leading threat to human health, with complicated pathogenesis and limited therapeutic options. Our previous study showed that Musculus senhousei peptides (MSPs) exhibit protective potential against early-stage alcoholic liver injury, although the underlying mechanism is not yet clear. In this study, histopathological analysis, mRNA abundance of injury-associated biomarkers, the gut microbiota, and faecal metabolome were evaluated using a mouse model subjected to acute alcohol exposure, aiming to identify the mechanism by which MSP can alleviate alcoholic hepatotoxicity. The results showed that MSP intervention significantly ameliorated symptoms of liver injury (suppressed serum ALT increment, hepatic lipid accumulation, and neutrophil infiltration in liver tissue), and reversed the abnormal mRNA abundance of biomarkers associated with oxidative stress (iNOS), inflammation (TNF-α, IL-1β, MCP-1, TNF-R1, and TLR4), and apoptosis (Bax and Casp. 3) in the liver. Moreover, MSP improved intestinal barrier function by increasing the expression of tight junction proteins (Claudin-1 and Claudin-3). Further analysis of faecal microbiota and metabolome revealed that MSP promoted the growth of tryptophan-metabolizing bacteria (Clostridiales, Alistipes, and Odoribacter), leading to increased production of indole derivatives (indole-3-lactic acid and N-acetyltryptophan). These results suggested that MSPs may alleviate alcohol-induced liver injury targeting the gut-liver axis, and could be an effective option for the prevention of alcoholic liver injury.
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Affiliation(s)
- Chuqiao Xiao
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China.
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou, 521000, China.
| | - Ruibo Jia
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou, 521000, China.
| | - Xiang-Guang Li
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Mouming Zhao
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou, 521000, China.
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wenzhen Liao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Suqing Zhao
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Feiran Xu
- School of Food and Biological Engineering, Key Laboratory of Animal Source of Anhui Province, Hefei University of Technology, Hefei 230601, Anhui, China
| | - Fidel Toldrá
- Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Avenue Agustín Escardino 7, 46980 Paterna, Valencia, Spain
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3
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Chen J, Ji H, Luo J, Zhang D, Liu S. Two novel angiotensin-converting enzyme (ACE) and dipeptidyl peptidase IV (DPP-IV) inhibiting peptides from tilapia (Oreochromis mossambicus) skin and their molecular docking mechanism. J Food Sci 2024; 89:3603-3617. [PMID: 38638071 DOI: 10.1111/1750-3841.17059] [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: 09/25/2023] [Revised: 03/03/2024] [Accepted: 03/16/2024] [Indexed: 04/20/2024]
Abstract
In the study, papain was used to hydrolyze tilapia (Oreochromis mossambicus) skin to obtain a tilapia skin hydrolysate (TSH) with dual angiotensin-converting enzyme (ACE) and dipeptidyl peptidase IV (DPP-IV) inhibitory activities. The resulting TSH was sequentially fractionated by ultrafiltration, size exclusion separation chromatography, and reverse-phase high-performance liquid chromatography. Its inhibitory effects on ACE and DPP-IV were determined by commercial reagent kits. Two peptides purified from TSH were identified as Gly-Pro-Leu-Gly-Ala-Leu (GPLGAL) and Lys-Pro-Ala-Gly-Asn (KPAGN) by the ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Inhibitory concentration (IC50) of GPLGAL on ACE and DPP-IV were 117.20 ± 1.69 and 187.10 ± 2.75 µM, respectively. IC50 of KPAGN on ACE and DPP-IV were 137.40 ± 2.33 and 259.20 ± 2.85 µM, respectively. The molecular simulation demonstrated that the binding affinities of GPLGAL to ACE and DPP-IV proteins were -8.5 and -7.4 kcal/mol, respectively, whereas those of KPAGN to ACE and DPP-IV proteins were -7.9 and -6.7 kcal/mol, respectively. GPLGAL interacted with 21 amino acid residues of the ACE active site, whereas KPAGN engaged with 19 amino acid residues. Additionally, GPLGAL interacted with 10 amino acid residues of the DPP-IV active site, whereas KPAGN engaged with 13 amino acid residues. The two peptides predominantly occupied the active sites of ACE (His513, Tyr523, and Ala354) and DPP-IV (Tyr662 and Arg125) through hydrogen bonding. This leads to the deactivation of ACE and DPP-IV. PRACTICAL APPLICATION: Accelerate tilapia skin development and high-value utilization; provide foundation for preparing the peptides with dual ACE and DPP-IV inhibiting activity.
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Affiliation(s)
- Jiayi Chen
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, P. R. China
| | - Hongwu Ji
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, P. R. China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang, P. R. China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, P. R. China
- Guangdong Provincial Engineering Technology Research Center of seafood, Zhanjiang, P. R. China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, P. R. China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, P. R. China
| | - Jing Luo
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, P. R. China
| | - Di Zhang
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, P. R. China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang, P. R. China
| | - Shucheng Liu
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang, P. R. China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang, P. R. China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang, P. R. China
- Guangdong Provincial Engineering Technology Research Center of seafood, Zhanjiang, P. R. China
- Key Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education Institution, Zhanjiang, P. R. China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, P. R. China
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4
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Xu Q, Zheng L, Huang M, Zhao M. Collagen derived Gly-Pro-type DPP-IV inhibitory peptides: Structure-activity relationship, inhibition kinetics and inhibition mechanism. Food Chem 2024; 441:138370. [PMID: 38199113 DOI: 10.1016/j.foodchem.2024.138370] [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: 10/20/2023] [Revised: 12/20/2023] [Accepted: 01/04/2024] [Indexed: 01/12/2024]
Abstract
Our previous study has demonstrated that both the amino acid at N3 position and peptide length affected the DPP-IV inhibitory activity of Gly-Pro-type peptides. To further elucidate their molecular mechanism, a combined approach of QSAR modeling, enzymatic kinetics and molecular docking was used. Results showed that the QSAR models of Gly-Pro-type tripeptides and Gly-Pro-type peptides containing 3-12 residues were successfully constructed by 5z-scale descriptor with R2 of 0.830 and 0.797, respectively. The lower values of electrophilicity, polarity, and side-chain bulk of amino acid at N3 position caused higher DPP-IV inhibitory activity of Gly-Pro-type peptides. Moreover, an appropriate increase in the length of Gly-Pro-type peptides did not change their competitive inhibition mode, but decreased their inhibition constants (Ki values) and increased interactions with DPP-IV. More importantly, the interactions between the residues at C-terminal of Gly-Pro-type peptides containing 5 ∼ 6 residues with S2 extensive subsites (Ser209, Phe357, Arg358) of DPP-IV increased the interactions of Gly residue at N1 position with the S2 subsites (Glu205, Glu206, Asn710, Arg125, Tyr662) and decreased the acylation level of DPP-IV-peptide complex, and thereby increasing peptides' DPP-IV inhibitory activity.
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Affiliation(s)
- Qiongyao Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Lin Zheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China.
| | - Mingtao Huang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou, 521000, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou, 521000, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China.
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5
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Qian J, Yu F, Zheng L, Luo D, Zhao M. Comparison of the Protective Effects of Casein Hydrolysate Containing Tyr-Pro-Val-Glu-Pro-Phe and Casein on the Behaviors and Peripheral and Brain Functions in Mice with Chronic-Stress-Induced Anxiety and Insomnia. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:11515-11530. [PMID: 38726599 DOI: 10.1021/acs.jafc.4c01074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Chronic stress is a major inducer of anxiety and insomnia. Milk casein has been studied for its stress-relieving effects. We previously prepared a casein hydrolysate (CP) rich in the sleep-enhancing peptide YPVEPF, and this study aims to systemically investigate the different protective effects of CP and casein on dysfunction and anxiety/insomnia behavior and its underlying mechanisms in chronically stressed mice. Behavioral results showed that CP ameliorated stress-induced insomnia and anxiety more effectively than milk casein, and this difference in amelioration was highly correlated with an increase in GABA, 5-HT, GABAA, 5-HT1A receptors, and BDNF and a decrease in IL-6 and NMDA receptors in stressed mice. Furthermore, CP restored these dysfunctions in the brain and colon by activating the HPA response, modulating the ERK/CREB-BDNF-TrκB signaling pathway, and alleviating inflammation. The abundant YPVEPF (1.20 ± 0.04%) and Tyr-based/Trp-containing peptides of CP may be the key reasons for its different effects compared to casein. Thus, this work revealed the main active structures of CP and provided a novel dietary intervention strategy for the prevention and treatment of chronic-stress-induced dysfunction and anxiety/insomnia behaviors.
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Affiliation(s)
- Jingjing Qian
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Fengjie Yu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Lin Zheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Donghui Luo
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou 521000, China
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou 521000, China
- Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
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6
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Bjerknes C, Wubshet SG, Rønning SB, Afseth NK, Currie C, Framroze B, Hermansen E. Glucoregulatory Properties of a Protein Hydrolysate from Atlantic Salmon ( Salmo salar): Preliminary Characterization and Evaluation of DPP-IV Inhibition and Direct Glucose Uptake In Vitro. Mar Drugs 2024; 22:151. [PMID: 38667768 PMCID: PMC11050766 DOI: 10.3390/md22040151] [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: 02/23/2024] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024] Open
Abstract
Metabolic disorders are increasingly prevalent conditions that manifest pathophysiologically along a continuum. Among reported metabolic risk factors, elevated fasting serum glucose (FSG) levels have shown the most substantial increase in risk exposure. Ultimately leading to insulin resistance (IR), this condition is associated with notable deteriorations in the prognostic outlook for major diseases, including neurodegenerative diseases, cancer risk, and mortality related to cardiovascular disease. Tackling metabolic dysfunction, with a focus on prevention, is a critically important aspect for human health. In this study, an investigation into the potential antidiabetic properties of a salmon protein hydrolysate (SPH) was conducted, focusing on its potential dipeptidyl peptidase-IV (DPP-IV) inhibition and direct glucose uptake in vitro. Characterization of the SPH utilized a bioassay-guided fractionation approach to identify potent glucoregulatory peptide fractions. Low-molecular-weight (MW) fractions prepared by membrane filtration (MWCO = 3 kDa) showed significant DPP-IV inhibition (IC50 = 1.01 ± 0.12 mg/mL) and glucose uptake in vitro (p ≤ 0.0001 at 1 mg/mL). Further fractionation of the lowest MW fractions (<3 kDa) derived from the permeate resulted in three peptide subfractions. The subfraction with the lowest molecular weight demonstrated the most significant glucose uptake activity (p ≤ 0.0001), maintaining its potency even at a dilution of 1:500 (p ≤ 0.01).
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Affiliation(s)
- Christian Bjerknes
- Hofseth Biocare ASA, Keiser Wilhelms Gate 24, 6003 Ålesund, Norway; (C.C.); (B.F.); (E.H.)
| | | | | | | | - Crawford Currie
- Hofseth Biocare ASA, Keiser Wilhelms Gate 24, 6003 Ålesund, Norway; (C.C.); (B.F.); (E.H.)
| | - Bomi Framroze
- Hofseth Biocare ASA, Keiser Wilhelms Gate 24, 6003 Ålesund, Norway; (C.C.); (B.F.); (E.H.)
| | - Erland Hermansen
- Hofseth Biocare ASA, Keiser Wilhelms Gate 24, 6003 Ålesund, Norway; (C.C.); (B.F.); (E.H.)
- Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Larsgårdsvegen 2, 6009 Ålesund, Norway
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7
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Yang D, Liu Q, Xu Q, Zheng L, Zhang S, Lu S, Xiao G, Zhao M. Effects of collagen hydrolysates on UV-induced photoaging mice: Gly-Pro-Hyp as a potent anti-photoaging peptide. Food Funct 2024; 15:3008-3022. [PMID: 38411396 DOI: 10.1039/d3fo04949c] [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: 02/28/2024]
Abstract
This work aimed to investigate the protective effects of collagen hydrolysates containing different contents of Gly-Pro-Xaa tripeptides on UV-induced photoaging mice and to identify potent anti-photoaging peptides. Results showed that oral ingestion of collagen hydrolysates with a higher content of Gly-Pro-Xaa tripeptides (∼11.4%, HCH) dramatically enhanced the absorption of Pro-Hyp, Hyp-Gly, and Gly-Pro-Hyp into the body, which were 1.77-, 2.18-, and 65.07-fold higher in area under the concentration-time curve (AUC) values than that of collagen hydrolysates with a lower content of Gly-Pro-Xaa tripeptides (∼3.8%, LCH), respectively. Furthermore, the protective effects of HCH on the photo-aged skin of mice were significantly stronger than those of LCH in terms of increases in the contents of hyaluronic acid and collagen, improvement in skin elasticity and epidermal thickness, alleviation in inflammation, and decreases in the contents of matrix metalloproteinase-1 (MMP-1) and MMP-3. More importantly, Gly-Pro-Hyp displayed potent anti-photoaging activities comparable to HCH based on an equivalent amount of Hyp. Network pharmacology analysis for potential mechanisms further indicated that Gly-Pro-Hyp might interact with JUN and FOS and regulate IL-17 and TNF signaling pathways. Collectively, our results suggested that HCH had great potential to be applied in functional foods for skin health and Gly-Pro-Hyp was found to be a potent collagen-derived anti-photoaging peptide, which might contribute to the excellent anti-photoaging effects of HCH.
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Affiliation(s)
- Danyin Yang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Qi Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Qiongyao Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Lin Zheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Silu Zhang
- Shenzhen Porshealth Bioengineering Co., Ltd, Shenzhen 518116, China.
| | - Shan Lu
- Shenzhen Porshealth Bioengineering Co., Ltd, Shenzhen 518116, China.
| | - Guoxun Xiao
- Shenzhen Porshealth Bioengineering Co., Ltd, Shenzhen 518116, China.
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
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8
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Wang W, Lin H, Shen W, Qin X, Gao J, Cao W, Zheng H, Chen Z, Zhang Z. Optimization of a Novel Tyrosinase Inhibitory Peptide from Atrina pectinata Mantle and Its Molecular Inhibitory Mechanism. Foods 2023; 12:3884. [PMID: 37959003 PMCID: PMC10649063 DOI: 10.3390/foods12213884] [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: 09/06/2023] [Revised: 10/17/2023] [Accepted: 10/22/2023] [Indexed: 11/15/2023] Open
Abstract
In order to realize the multi-level utilization of marine shellfish resources and to develop the potential biological activity of processing by-products of Atrina pectinata, gelatin was extracted from the mantle and the potential whitening effect of its enzymatic peptides was explored. Taking tyrosinase inhibitory activity as the evaluation index, the enzyme hydrolysate process was optimized by response-surface methodology, and the optimal enzyme hydrolysate conditions were as follows: pH 5.82, 238 min enzyme hydrolysate time, and temperature of 54.5 °C. Under these conditions, the tyrosinase inhibition activity of Atrina pectinata mantle gelatin peptide (APGP) was 88.6% (IC50 of 3.268 ± 0.048 mg/mL). The peptides obtained from the identification were separated by ultrafiltration and LC-MS/MS, and then four new peptides were screened by molecular docking, among which the peptide Tyr-Tyr-Pro (YYP) had the strongest inhibitory effect on tyrosinase with an IC50 value of 1.764 ± 0.025 mM. The molecular-docking results indicated that hydrogen bonding is the main driving force for the interaction of the peptide YYP with tyrosinase. From the Lineweaver-Burk analysis, it could be concluded that YYP is inhibitory to tyrosinase and exhibits a mixed mechanism of inhibition. These results suggest that YYP could be widely used as a tyrosinase inhibitor in whitening foods and pharmaceuticals.
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Affiliation(s)
- Wen Wang
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
| | - Haisheng Lin
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
- National Research and Development Branch Center for Shellfish Processing (Zhanjiang), Zhanjiang 524088, China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang 524088, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Weiqiang Shen
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
| | - Xiaoming Qin
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
- National Research and Development Branch Center for Shellfish Processing (Zhanjiang), Zhanjiang 524088, China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang 524088, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Jialong Gao
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
- National Research and Development Branch Center for Shellfish Processing (Zhanjiang), Zhanjiang 524088, China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang 524088, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Wenhong Cao
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
- National Research and Development Branch Center for Shellfish Processing (Zhanjiang), Zhanjiang 524088, China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang 524088, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Huina Zheng
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
- National Research and Development Branch Center for Shellfish Processing (Zhanjiang), Zhanjiang 524088, China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang 524088, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Zhongqin Chen
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
- National Research and Development Branch Center for Shellfish Processing (Zhanjiang), Zhanjiang 524088, China
- Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety, Zhanjiang 524088, China
- Guangdong Provincial Engineering Technology Research Center of Seafood, Zhanjiang 524088, China
- Guangdong Province Engineering Laboratory for Marine Biological Products, Zhanjiang 524088, China
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Zhishu Zhang
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; (W.W.); (X.Q.); (J.G.); (W.C.); (H.Z.); (Z.C.)
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9
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Xu S, Zhao Y, Song W, Zhang C, Wang Q, Li R, Shen Y, Gong S, Li M, Sun L. Improving the Sustainability of Processing By-Products: Extraction and Recent Biological Activities of Collagen Peptides. Foods 2023; 12:foods12101965. [PMID: 37238782 DOI: 10.3390/foods12101965] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/02/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Society and consumers are increasingly concerned about food safety and the sustainability of food production systems. A significant amount of by-products and discards are generated during the processing of aquatic animals, which still needs to be fully utilized by the food industry. The management and sustainable use of these resources are essential to avoiding environmental pollution and resource waste. These by-products are rich in biologically active proteins, which can be converted into peptides by enzymatic hydrolysis or fermentation treatment. Therefore, exploring the extraction of collagen peptides from these by-products using an enzymatic hydrolysis technology has attracted a wide range of attention from numerous researchers. Collagen peptides have been found to possess multiple biological activities, including antioxidant, anticancer, antitumor, hypotensive, hypoglycemic, and anti-inflammatory properties. These properties can enhance the physiological functions of organisms and make collagen peptides useful as ingredients in food, pharmaceuticals, or cosmetics. This paper reviews the general methods for extracting collagen peptides from various processing by-products of aquatic animals, including fish skin, scales, bones, and offal. It also summarizes the functional activities of collagen peptides as well as their applications.
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Affiliation(s)
- Shumin Xu
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Yuping Zhao
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Wenshan Song
- Marine Biomedical Research Institute of Qingdao, No. 23, Hong Kong East Road, Qingdao 266073, China
| | - Chengpeng Zhang
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Qiuting Wang
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Ruimin Li
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Yanyan Shen
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Shunmin Gong
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Mingbo Li
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
| | - Leilei Sun
- College of Life Science, Yantai University, No. 30, Qing Quan Road, Yantai 264005, China
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10
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Zhang X, Yang J, Suo H, Tan J, Zhang Y, Song J. Identification and molecular mechanism of action of antibacterial peptides from Flavourzyme-hydrolyzed yak casein against Staphylococcus aureus. J Dairy Sci 2023; 106:3779-3790. [PMID: 37105875 DOI: 10.3168/jds.2022-22823] [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: 09/26/2022] [Accepted: 01/03/2023] [Indexed: 04/29/2023]
Abstract
Antibacterial peptides can be released from yak milk casein. To date, the amino acid sequences and mechanism of action of yak casein-derived antibacterial peptides remain unknown. The current study identified antibacterial peptides from yak casein and their molecular mechanism of action. Our results showed that yak α-casein, β-casein, and κ-casein could be effectively hydrolyzed by Flavourzyme (Solarbio Science and Technology Co. Ltd.), and the 2-h hydrolysate showed the highest antibacterial rate of 43.07 ± 2.59% against Staphylococcus aureus. The 1,000 to 3,000 Da fraction accounted for 23.61% of the 2-h hydrolysate and had an antibacterial rate of 62.64 ± 4.40%. Three novel peptides with antibacterial activity were identified from this fraction, and the β-casein-derived peptide APKHKEMPFPKYP showed the strongest antibacterial effect (half-maximal inhibitory concentration = 0.397 mg/mL). Molecular docking predicted that APKHKEMPFPKYP interacted with 2 important enzymes of Staph. aureus, dihydrofolate reductase and DNA gyrase, through hydrophobic, hydrogen bonding, salt bridge, and π-π stacking interactions. Our findings suggest that the yak casein-derived peptides may serve as a potential source of natural preservatives to inhibit Staph. aureus.
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Affiliation(s)
- Xilu Zhang
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
| | - Jing Yang
- Chongqing Engineering Research Center for Processing and Storage of Distinct Agricultural Products, Chongqing Technology and Business University, Chongqing 400067, China
| | - Huayi Suo
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
| | - Jiao Tan
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
| | - Yu Zhang
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China
| | - Jiajia Song
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China.
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11
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Cheng JH, Zhao WX, Cao HY, Wang Z, Wang Y, Sheng Q, Chen Y, Wang P, Chen XL, Zhang YZ. Mechanistic Insight Into the Production of Collagen Oligopeptides by the S8 Family Protease A4095. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:603-614. [PMID: 36577515 DOI: 10.1021/acs.jafc.2c05402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Collagen oligopeptides have wide applications in foods, pharmaceuticals, cosmetics, and others due to their high bioactivities and bioavailability. The S8 family is the second-largest family of serine proteases. Several collagenolytic proteases from this family have been reported to have good potential in the preparation of collagen oligopeptides, however, the underlying mechanism remains unknown. A4095 was the most abundant S8 protease secreted by the protease-producing bacterium Anoxybacillus caldiproteolyticus 1A02591. Here, we characterized A4095 as an S8 collagenolytic protease and illustrated its structural basis to produce collagen oligopeptides. Protease A4095 preferentially hydrolyzed the Y-Gly peptide bonds in denatured bovine bone collagen, leading to high production (62.48% <1000 Da) of collagen oligopeptides. Structural and mutational analyses indicated that A4095 has a unique S1' substrate-binding pocket to preferentially bind Gly, which is the structural determinant for the high production of collagen oligopeptides. This study provides mechanistic insight into the advantage of the S8 collagenolytic proteases in preparing collagen oligopeptides.
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Affiliation(s)
- Jun-Hui Cheng
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
| | - Wen-Xiao Zhao
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
| | - Hai-Yan Cao
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
| | - Zhen Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
| | - Yan Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
| | - Qi Sheng
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
| | - Yin Chen
- School of Life Sciences, University of Warwick, CoventryCV4 7AL, United Kingdom
| | - Peng Wang
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao266003, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao266237, China
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao266237, China
| | - Yu-Zhong Zhang
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao266003, China
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao266237, China
- Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao266237, China
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12
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Liu W, Wang X, Yang W, Li X, Qi D, Chen H, Liu H, Yu S, Pan Y, Liu Y, Wang G. Identification, Screening, and Comprehensive Evaluation of Novel DPP-IV Inhibitory Peptides from the Tilapia Skin Gelatin Hydrolysate Produced Using Ginger Protease. Biomolecules 2022; 12:biom12121866. [PMID: 36551294 PMCID: PMC9775409 DOI: 10.3390/biom12121866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/07/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Inhibition of dipeptidyl peptidase-IV (DPP-IV) is an effective therapy for treating type II diabetes (T2D) that has been widely applied in clinical practice. We aimed to evaluate the DPP-IV inhibitory properties of ginger protease hydrolysate (GPH) and propose a comprehensive approach to screen and evaluate DPP-IV inhibitors. METHODS We evaluated the in vitro inhibitory properties of fish skin gelatin hydrolysates produced by five proteases, namely, neutral protease, alkaline protease, bromelain, papain, and ginger protease, toward DPP-IV. We screened the most potent DPP-IV inhibitory peptide (DIP) using liquid chromatography-tandem mass spectrometry (LC-MS/MS) coupled with in silico analysis. Next, surface plasmon resonance (SPR) technology was innovatively introduced to explore the interactions between DPP-IV and DIP, as well as the IC50. Furthermore, we performed oral administration of DIP in rats to study its in vivo absorption. RESULTS GPH displayed the highest degree of hydrolysis (20.37%) and DPP-IV inhibitory activity (65.18%). A total of 292 peptides from the GPH were identified using LC-MS/MS combined with de novo sequencing. Gly-Pro-Hyp-Gly-Pro-Pro-Gly-Pro-Gly-Pro (GPXGPPGPGP) was identified as the most potent DPP-IV inhibitory peptide after in silico screening (Peptide Ranker and molecular docking). Then, the in vitro study revealed that GPXGPPGPGP had a high inhibitory effect on DPP-IV (IC50: 1012.3 ± 23.3 μM) and exhibited fast kinetics with rapid binding and dissociation with DPP-IV. In vivo analysis indicated that GPXGPPGPGP was not absorbed intact but partially, in the form of dipeptides and tripeptides. CONCLUSION Overall, the results suggested that GPH would be a natural functional food for treating T2D and provided new ideas for searching and evaluating potential antidiabetic compounds. The obtained GPXGPPGPGP can be structurally optimized for in-depth evaluation in animal and cellular experiments.
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Affiliation(s)
- Wei Liu
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Xinyu Wang
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Wenning Yang
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Xueyan Li
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Dongying Qi
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Hongjiao Chen
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Huining Liu
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Shuang Yu
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
| | - Yanli Pan
- Institute of Information on Traditional Chinese Medicine China Academy of Chinese Medical Sciences, Beijing 100700, China
- Correspondence: (Y.P.); (Y.L.); (G.W.)
| | - Yang Liu
- Department of Chemistry of Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
- Correspondence: (Y.P.); (Y.L.); (G.W.)
| | - Guopeng Wang
- Zhongcai Health (Beijing) Biological Technology Development Co., Ltd., Beijing 101500, China
- Correspondence: (Y.P.); (Y.L.); (G.W.)
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Bartolomei M, Capriotti AL, Li Y, Bollati C, Li J, Cerrato A, Cecchi L, Pugliese R, Bellumori M, Mulinacci N, Laganà A, Arnoldi A, Lammi C. Exploitation of Olive (Olea europaea L.) Seed Proteins as Upgraded Source of Bioactive Peptides with Multifunctional Properties: Focus on Antioxidant and Dipeptidyl-Dipeptidase—IV Inhibitory Activities, and Glucagon-like Peptide 1 Improved Modulation. Antioxidants (Basel) 2022; 11:antiox11091730. [PMID: 36139804 PMCID: PMC9495363 DOI: 10.3390/antiox11091730] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 08/27/2022] [Accepted: 08/28/2022] [Indexed: 11/18/2022] Open
Abstract
Agri-food industry wastes and by-products include highly valuable components that can upgraded, providing low-cost bioactives or used as an alternative protein source. In this context, by-products from olive production and olive oil extraction process, i.e., seeds, can be fostered. In particular, this work was aimed at extracting and characterizing proteins for Olea europaea L. seeds and at producing two protein hydrolysates using alcalase and papain, respectively. Peptidomic analysis were performed, allowing to determine both medium- and short-sized peptides and to identify their potential biological activities. Moreover, an extensive characterization of the antioxidant properties of Olea europaea L. seed hydrolysates was carried out both in vitro by 2,2-diphenyl-1-picrylhydrazyl (DPPH), by ferric reducing antioxidant power (FRAP), and by 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) assays, respectively, and at cellular level by measuring the ability of these hydrolysates to significant reduce the H2O2-induced reactive oxygen species (ROS) and lipid peroxidation levels in human intestinal Caco-2 cells. The results of the both hydrolysates showed significant antioxidant properties by reducing the free radical scavenging activities up to 65.0 ± 0.1% for the sample hydrolyzed with alcalase and up to 75.7 ± 0.4% for the papain hydrolysates tested at 5 mg/mL, respectively. Moreover, similar values were obtained by the ABTS assays, whereas the FRAP increased up to 13,025.0 ± 241.5% for the alcalase hydrolysates and up to 12,462.5 ± 311.9% for the papain hydrolysates, both tested at 1 mg/mL. According to the in vitro results, both papain and alcalase hydrolysates restore the cellular ROS levels up 130.4 ± 4.24% and 128.5 ± 3.60%, respectively, at 0.1 mg/mL and reduce the lipid peroxidation levels up to 109.2 ± 7.95% and 73.0 ± 7.64%, respectively, at 1.0 mg/mL. In addition, results underlined that the same hydrolysates reduced the activity of dipeptidyl peptidase-IV (DPP-IV) in vitro and at cellular levels up to 42.9 ± 6.5% and 38.7 ± 7.2% at 5.0 mg/mL for alcalase and papain hydrolysates, respectively. Interestingly, they stimulate the release and stability of glucagon-like peptide 1 (GLP-1) hormone through an increase of its levels up to 660.7 ± 21.9 pM and 613.4 ± 39.1 pM for alcalase and papain hydrolysates, respectively. Based on these results, olive seed hydrolysates may represent new ingredients with antioxidant and anti-diabetic properties for the development of nutraceuticals and functional foods for the prevention of metabolic syndrome onset.
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Affiliation(s)
- Martina Bartolomei
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Anna Laura Capriotti
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Yuchen Li
- Longping Biotech Co., Ltd., Sanya 572000, China
| | - Carlotta Bollati
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Jianqiang Li
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Andrea Cerrato
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Lorenzo Cecchi
- Department of Neuroscience, Psychology, Drug and Child Health, Pharmaceutical and Nutraceutical Section, University of Florence, 50019 Florence, Italy
| | - Raffaele Pugliese
- NeMO Lab, ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy
| | - Maria Bellumori
- Department of Neuroscience, Psychology, Drug and Child Health, Pharmaceutical and Nutraceutical Section, University of Florence, 50019 Florence, Italy
| | - Nadia Mulinacci
- Department of Neuroscience, Psychology, Drug and Child Health, Pharmaceutical and Nutraceutical Section, University of Florence, 50019 Florence, Italy
| | - Aldo Laganà
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Anna Arnoldi
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
| | - Carmen Lammi
- Department of Pharmaceutical Sciences, University of Milan, 20133 Milan, Italy
- Correspondence: ; Tel.: +39-02-50319372
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