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Kawano K, Shobako M, Furukawa T, Toyooka T, Ohinata K. Fatty acid amides present in Camembert cheese improved cognitive decline after oral administration in mice. Neurosci Res 2024; 205:34-39. [PMID: 38458493 DOI: 10.1016/j.neures.2024.03.002] [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: 12/05/2023] [Revised: 02/19/2024] [Accepted: 03/06/2024] [Indexed: 03/10/2024]
Abstract
Herein, we investigated the effects of Camembert cheese (CC) and its fatty acid contents on cognitive function in mice by employing the object recognition test to evaluate hippocampus-dependent memory. Orally administered CC improved the cognitive decline induced by a high-fat diet. Next, we focused on myristamide (MA), oleamide, and stearamide, which are fatty acid amides produced during the fermentation process of CC. We found that oral administration of MA improved cognitive decline. Notably, an improvement was not observed using myristic acid, a free fatty acid that is not amidated. Thus, fatty acid amidation may contribute to the physiological activity. Moreover, we investigated changes in gene expression related to neurogenesis in the hippocampus. After MA administration, mRNA expression analysis indicated that MA increased hippocampal brain-derived neurotrophic factor expression.
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Affiliation(s)
- Kohei Kawano
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan
| | - Maiko Shobako
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan
| | - Taichi Furukawa
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan
| | - Tatsuhiro Toyooka
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan
| | - Kousaku Ohinata
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan.
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2
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Nakajima T, Shobako M, Kaneko K, Kurabayashi A, Sato M, Ohinata K. Ovomemolins: Egg-derived peptides that improved cognitive decline after oral administration in mice. FASEB Bioadv 2024; 6:177-188. [PMID: 38974115 PMCID: PMC11226991 DOI: 10.1096/fba.2023-00149] [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: 12/11/2023] [Revised: 03/05/2024] [Accepted: 03/13/2024] [Indexed: 07/09/2024] Open
Abstract
Eggs not only contain all the molecules necessary to nurture new life but are also rich in nutrients such as high-quality protein. For example, epidemiologic studies have shown that egg intake is positively correlated with cognitive function. Thus, we specifically examined the effect of ovalbumin, a major protein present in egg whites, on cognitive function. First, we found that an orally administered enzymatic digest of ovalbumin improves cognitive function in mice fed a high-fat diet. Then, we narrowed down candidate peptides based on the prediction of peptide production according to enzyme-substrate specificity and comprehensive peptide analysis of the digest. We found that three peptides, namely ILPEY, LYRGGLEP, and ILELP, improve cognitive function after oral administration. We also showed that ILPEY, LYRGGLEP, and ILELP were present in the digest and named them ovomemolins A (OMA), B, and C, respectively. Notably, ovomemolins are the first peptides derived from egg whites that have been shown to improve cognitive function. The cognitive improvement induced by OMA, the most abundant of the peptides in the digest, was inhibited by methyllycaconitine, an antagonist of α7nAChR, which is known to be related to memory. These results suggest that OMA improves cognitive function through the acetylcholine system. After OMA administration, brain-derived neurotrophic factor (BDNF) mRNA expression and the number of 5-bromo-2'-deoxyuridine-positive cells suggested that OMA increases hippocampal BDNF expression and neurogenesis.
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Affiliation(s)
- Takanobu Nakajima
- Division of Food Science and Biotechnology, Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Maiko Shobako
- Division of Food Science and Biotechnology, Graduate School of AgricultureKyoto UniversityKyotoJapan
| | - Kentaro Kaneko
- Division of Food Science and Biotechnology, Graduate School of AgricultureKyoto UniversityKyotoJapan
| | | | - Masaru Sato
- Department of Applied GenomicsKazusa DNA Research InstituteKisarazuJapan
| | - Kousaku Ohinata
- Division of Food Science and Biotechnology, Graduate School of AgricultureKyoto UniversityKyotoJapan
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3
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Nakatani E, Sasai M, Miyazaki H, Tanaka S, Hirota T, Okura T. Investigating the Transepithelial Transport and Enzymatic Stability of Lactononadecapeptide (NIPPLTQTPVVVPPFLQPE), a 19-Amino Acid Casein-Derived Peptide in Caco-2 Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:12719-12724. [PMID: 38789103 PMCID: PMC11157532 DOI: 10.1021/acs.jafc.4c00974] [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: 01/31/2024] [Revised: 04/26/2024] [Accepted: 05/12/2024] [Indexed: 05/26/2024]
Abstract
Lactononadecapeptide (LNDP; NIPPLTQTPVVVPPFLQPE), a casein-derived peptide comprising 19 residues, is known for its capacity to enhance cognitive function. This study aimed to explore the transepithelial transport and stability of LNDP. Results showed that LNDP retained over 90% stability after 2 h of treatment with gastrointestinal enzymes. The stability of LNDP on Caco-2 cell monolayers ranged from 93.4% ± 0.9% to 101.1% ± 1.2% over a period of 15-60 min, with no significant differences at each time point. The permeability of LNDP across an artificial lipid membrane was very low with the effective permeability of 3.6 × 10-11 cm/s. The Caco-2 assay demonstrated that LNDP could traverse the intestinal epithelium, with an apparent permeability of 1.22 × 10-6 cm/s. Its transport was significantly inhibited to 67.9% ± 5.0% of the control by Gly-Pro, a competitor of peptide transporter 1 (PEPT1). Furthermore, PEPT1 knockdown using siRNA significantly inhibited LNDP transport by 77.6% ± 1.9% in Caco-2 cell monolayers. The LNDP uptake in PEPT1-expressing HEK293 cells was significantly higher (54.5% ± 14.6%) than that in mock cells. These findings suggest that PEPT1 plays a crucial role in LNDP transport, and LNDP exhibits good resistance to gastrointestinal enzymes.
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Affiliation(s)
- Eriko Nakatani
- Laboratory
of Pharmaceutics, Faculty of Pharmaceutical Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Masaki Sasai
- Core
Technology Laboratories, Asahi Quality and
Innovations, Ltd., 1-1-21
Midori, Moriya, Ibaraki 302-0106, Japan
| | - Hidetoshi Miyazaki
- Core
Technology Laboratories, Asahi Quality and
Innovations, Ltd., 1-1-21
Midori, Moriya, Ibaraki 302-0106, Japan
| | - Shimako Tanaka
- Laboratory
of Pharmaceutics, Faculty of Pharmaceutical Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - Tatsuhiko Hirota
- Core
Technology Laboratories, Asahi Quality and
Innovations, Ltd., 1-1-21
Midori, Moriya, Ibaraki 302-0106, Japan
| | - Takashi Okura
- Laboratory
of Pharmaceutics, Faculty of Pharmaceutical Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
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Lan Y, Ma Z, Chang L, Peng J, Zhang M, Sun Q, Qiao R, Hou X, Ding X, Zhang Q, Peng Q, Dong J, Liu X. Sea buckthorn polysaccharide ameliorates high-fat diet induced mice neuroinflammation and synaptic dysfunction via regulating gut dysbiosis. Int J Biol Macromol 2023; 236:123797. [PMID: 36828095 DOI: 10.1016/j.ijbiomac.2023.123797] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 02/04/2023] [Accepted: 02/18/2023] [Indexed: 02/24/2023]
Abstract
Currently, definitive treatment for neurodegenerative diseases without side effects has not been developed, therefore, exploring natural polysaccharides with neuroprotection to prevent the occurrences and progressions of cognitive dysfunctions has important significance. The purpose of this study was to investigate the effects of sea buckthorn polysaccharide (SBP) on high-fat diet (HFD) induced mice cognitive dysfunctions and attempted to explore its biological mechanisms. Behavior tests (Y-maze and Barnes maze) suggested that SBP effectively alleviated the HFD induced behavioral disorders, which was in accordance with the inhibition of neuroinflammation via suppressing the NF-κB pathway and amelioration of synaptic dysfunction via upregulating CREB/BDNF/TrkB pathway in mice brain. Furthermore, SBP alleviated the gut barrier impairment, inflammatory responses, and lipopolysaccharide invasion into blood circulation via regulating the gut microbiome structure, especially correcting the reduction of Ileibacterium and increase of Lactobacillus, Dubosiella, Olsenella, Helicobacter, and Ruminiclostridium_9 in HFD mice. Therefore, the reversal effects of SBP on gut dysbiosis might be the important reason for its positive effects on cognitive dysfunction induced by HFD in mice.
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Affiliation(s)
- Ying Lan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Zhiyuan Ma
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Lili Chang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jing Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Mengqi Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qingyang Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Ruixue Qiao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xinglin Hou
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xuechao Ding
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qiang Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qiang Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; Puredia Limited, Xining, China
| | - Juane Dong
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Xuebo Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China.
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Rice-memolin, a novel peptide derived from rice bran, improves cognitive function after oral administration in mice. Sci Rep 2023; 13:2887. [PMID: 36807368 PMCID: PMC9938899 DOI: 10.1038/s41598-023-30021-3] [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: 10/04/2022] [Accepted: 02/14/2023] [Indexed: 02/20/2023] Open
Abstract
Many people eat polished rice, while rice bran, a by-product known to be rich in protein and expected to have potential functions for health benefits, has not been effectively utilized. In this study, we determined that orally administered Val-Tyr-Thr-Pro-Gly (VYTPG) derived from rice bran protein improved cognitive decline in mice fed a high-fat diet (HFD). It was demonstrated that VYTPG was released from model peptides corresponding to fragment sequences of original rice proteins (Os01g0941500, Os01g0872700, and allergenic protein) after treatment with thermolysin, a microorganism-derived enzyme often used in industrial scale processes. The thermolysin digest also improved cognitive decline after oral administration in mice. Because VYTPG (1.0 mg/kg) potently improved cognitive decline and is enzymatically produced from the rice bran, we named it rice-memolin. Next, we investigated the mechanisms underlying the cognitive decline improvement associated with rice-memolin. Methyllycaconitine, an antagonist for α7 nicotinic acetylcholine receptor, suppressed the rice-memolin-induced effect, suggesting that rice-memolin improved cognitive decline coupled to the acetylcholine system. Rice-memolin increased the number of 5-bromo-2'-deoxyuridine (BrdU)-positive cells and promoted the mRNA expression of EGF and FGF-2 in the hippocampus, implying that these neurotropic factors play a role in hippocampal neurogenesis after rice-memolin administration. Epidemiologic studies demonstrated that diabetes is a risk factor for dementia; therefore, we also examined the effect of rice-memolin on glucose metabolism. Rice-memolin improved glucose intolerance. In conclusion, we identified a novel rice-derived peptide that can improve cognitive decline. The mechanisms are associated with acetylcholine and hippocampal neurogenesis. Rice-memolin is the first rice-brain-derived peptide able to improve cognitive decline.
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Jeong EK, Selvaraj B, Clovis S, Son YJ, Park TH, Veeramanoharan A, Kim HI, Yoo KY, Lee JW, Park CM. Synthesis and neuroprotective effects of H 2S-donor-peptide hybrids on hippocampal neuronal cells. Free Radic Biol Med 2023; 194:316-325. [PMID: 36528123 DOI: 10.1016/j.freeradbiomed.2022.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/01/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Hydrogen sulfide (H2S) has emerged as an endogenous signaling molecule that functions in many physiological and pathological processes of human cells in health and disease, including neuromodulation and neuroprotection, inflammation, angiogenesis, and vasorelaxation. The limited clinical applications of current H2S donors have led to the development of H2S donor hybrid compounds that combine current H2S donors with bioactive molecules. Finely tuned multi-targeting hybrid molecules have been shown to have complementary neuroprotective effects against reactive oxygen species (ROS)-induced oxidative stress. In this study, we developed hybrid molecules combining a dithiolethione-based slow-releasing H2S donor that exerts neuroprotective effects, with the tripeptides glycyl-L-histidyl-l-lysine (GHK) and L-alanyl-L-cystinyl-l-glutamine (ACQ), two natural products that exhibit powerful antioxidant effects. In particular, a hybrid combination of a dithiolethione-based slow-releasing H2S donor and ACQ exhibited significant neuroprotective effects against glutamate-induced oxidative damage in HT22 hippocampal neuronal cells. This hybrid remarkably suppressed Ca2+ accumulation and ROS production. Furthermore, it efficiently inhibited apoptotic neuronal cell death by blocking apoptosis-inducing factor release and its translocation to the nucleus. These results indicate that the hybrid efficiently inhibited apoptotic neuronal cell damage by complementary neuroprotective actions.
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Affiliation(s)
- Eui Kyun Jeong
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea
| | - Baskar Selvaraj
- Natural Product Research Center, Institute of Natural Product, Korea Institute of Science and Technology, Gangneung, Gangwon, 25451, South Korea
| | - Shyaka Clovis
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea
| | - Yun Jeong Son
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea
| | - Tae Hoo Park
- Natural Product Research Center, Institute of Natural Product, Korea Institute of Science and Technology, Gangneung, Gangwon, 25451, South Korea
| | - Ashokkumar Veeramanoharan
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea
| | - Hoe-In Kim
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea
| | - Ki-Yeon Yoo
- Department of Anatomy, College of Dentistry, Reseach Institute of Oral Sciences, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea
| | - Jae Wook Lee
- Natural Product Research Center, Institute of Natural Product, Korea Institute of Science and Technology, Gangneung, Gangwon, 25451, South Korea.
| | - Chung-Min Park
- Department of Chemistry, Gangneung-Wonju National University, Gangneung, Gangwon, 25457, South Korea.
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7
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Castellone V, Prandi B, Bancalari E, Tedeschi T, Gatti M, Bottari B. Peptide profile of Parmigiano Reggiano cheese after simulated gastrointestinal digestion: From quality drivers to functional compounds. Front Microbiol 2022; 13:966239. [PMID: 36081785 PMCID: PMC9445588 DOI: 10.3389/fmicb.2022.966239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 07/31/2022] [Indexed: 11/13/2022] Open
Abstract
Time of ripening has a strong impact on shaping the valuable and recognizable characteristics of long-ripened types of cheese such as Parmigiano Reggiano (PR) due to the interrelationship between microbiota and proteolysis that occurs during ripening. The derived peptide profile is linked to cheese quality and represents the canvas for enzymes upon digestion, which could be responsible for the release of potentially bioactive peptides (BPs). In this study, we aimed at investigating the presence of BP in 72 PR cheese samples of different ripening times, from curd to 24 months of ripening, produced in six different dairies, and following their fate after simulated gastrointestinal digestion. A small number of peptide sequences sharing 100% similarity with known antimicrobial, antioxidant, and ACE-inhibitor sequences were found in PR cheeses, while a higher number of potential BPs were found after their simulated gastrointestinal digestion, in different amounts according to ripening time. Taking advantage of the complex organization of the sampling plan, we were able to follow the fate of peptides considered quality drivers during cheese ripening to their release as functional compounds upon digestion.
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8
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Zeng X, Cai L, Gui Z, Shen T, Yang W, Chen Q, Chen Y. Association Between Dairy Intake and Executive Function in Chinese Children Aged 6–12 Years. Front Nutr 2022; 9:879363. [PMID: 35898711 PMCID: PMC9309784 DOI: 10.3389/fnut.2022.879363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 06/10/2022] [Indexed: 11/13/2022] Open
Abstract
Association between dairy intake and executive function remains controversial, especially among children, a population with fast-developing executive functions. This study aimed to explore this topic. Additionally, we further distinguished the role of dairy intake types (full- or low-fat milk or yogurt) in this relationship. This survey included 5,138 children aged 6–12 years. Dairy intakes were assessed by validated questionnaires. Executive function was measured by the behavior rating inventory of executive function (BRIEF; Parent Version), and lower T-scores of BRIEF indices indicated superior executive function performance. Results showed that children with higher dairy intake had statistically better performance in Shift (46.58 ± 7.48 vs. 45.85 ± 7.10), Initiate (48.02 ± 8.58 vs. 47.14 ± 8.33), and Working Memory (50.69 ± 8.82 vs. 49.89 ± 8.73). In the analysis of multivariate linear regression, we found that for every one unit increase in full-fat dairy intake, T-scores for Shift (β = −0.350 (95% confidence interval [CI]: (−0.660, −0.039) and Initiate (β = −0.486 (95% CI: (−0.845, −0.127) were decreased and for every one unit increase in low-fat dairy intake, T-score for Organizations of Materials (β = −0.940 (95% CI: (−1.690, −0.189) was decreased. After distinguishing dairy into milk and yogurt, we observed that only milk intake, not yogurt, was significantly associated with better executive function performance in Shift (β = −0.390 (95% CI (−0.745, −0.035) and Initiate (β = −0.509 (95% CI (−0.917, −0.101) after adjusting for potential confounding factors. This study shows that a higher intake of dairy, irrespective of fat content, is related to better executive function performance among children aged 6–12. In addition, a significantly positive relationship between dairy intake and executive function’s indices of Shift and Initiate only was observed in milk, not in yogurt.
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Affiliation(s)
- Xia Zeng
- Department of Child and Adolescent Health, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, Guangdong Pharmaceutical University, Guangzhou, China
| | - Li Cai
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhaohuan Gui
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Tianran Shen
- Department of Child and Adolescent Health, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
- Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, Guangdong Pharmaceutical University, Guangzhou, China
| | - Wenhan Yang
- Department of Child and Adolescent Health, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
- Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qingsong Chen
- Department of Child and Adolescent Health, School of Public Health, Guangdong Pharmaceutical University, Guangzhou, China
- Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, Guangdong Pharmaceutical University, Guangzhou, China
- *Correspondence: Qingsong Chen,
| | - Yajun Chen
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
- Yajun Chen,
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Extracts from the Leaves of Cissus verticillata Ameliorate High-Fat Diet-Induced Memory Deficits in Mice. PLANTS 2021; 10:plants10091814. [PMID: 34579347 PMCID: PMC8468243 DOI: 10.3390/plants10091814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 11/17/2022]
Abstract
We investigated the effects of Cissus verticillata leaf extract (CVE) on a high-fat diet (HFD)-induced obesity and memory deficits. Male mice (5 weeks of age) were fed vehicle (distilled water), or 30, 100, or 300 mg/kg of CVE once a day for 8 weeks with an HFD. Treatment with CVE resulted in lower body weight and glucose levels in a concentration- and feeding time-dependent manner. LDL cholesterol and triglyceride levels were significantly lower in the CVE-treated HFD group than in the vehicle-treated HFD group. In contrast, high-density lipoprotein cholesterol levels did not show any significant changes. Lipid droplets and ballooning were reduced depending on the concentration of CVE treatment compared to the HFD group. Treatment with CVE ameliorated the increase in glucagon and immunoreactivities in the pancreas, and novel object recognition memory was improved by 300 mg/kg CVE treatment compared to the HFD group. More proliferating cells and differentiated neuroblasts were higher in mice treated with CVE than in vehicle-treated HFD-fed mice. Brain-derived neurotrophic factor (BDNF) levels were significantly decreased in the HFD group, which was facilitated by treatment with 300 mg/kg CVE in hippocampal homogenates. These results suggest that CVE ameliorates HFD-induced obesity and memory deficits in mice, associated with increased BDNF levels in the hippocampus.
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Mizushige T. Neuromodulatory peptides: Orally active anxiolytic-like and antidepressant-like peptides derived from dietary plant proteins. Peptides 2021; 142:170569. [PMID: 33984426 DOI: 10.1016/j.peptides.2021.170569] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/09/2021] [Accepted: 05/03/2021] [Indexed: 12/22/2022]
Abstract
Mental disorders are a severe health problem, and the number of patients is growing worldwide. Increased anxiety and decreased motivation due to excessive mental stress further accelerated the severity of the problem. Enzymatic digestion of food proteins produces bioactive peptides with various physiological functions, some of which exhibit neuromodulatory effects with oral administration. Recently, studies reported that some peptides produced from plant proteins such as soybeans, leaves, and grains exhibit emotional regulatory functions such as strong anxiolytic-like and antidepressant-like effects comparable to pharmaceuticals. Conventionally, researchers investigated bioactive peptides by fractionation of protein hydrolysates and structure-activity relationship. As a novel methodology for analyzing bioactive peptides, the information obtained by peptidomics simultaneous analysis of the digested fractions of proteins using mass spectrometry has been effectively utilized. Some small-sized peptides such as dipeptides and tripeptides released food-derived proteins show emotional regulating effects. Moreover, some middle-sized peptides produced after intestinal digestion may exhibit the emotional regulating effect via the vagus nerve, and the importance of the gut-brain axis is also focused. As the central mechanism of emotional regulation, it has been found that these plant-derived peptides regulated monoamine neurotransmitter signaling and hippocampal neurogenesis.
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Affiliation(s)
- Takafumi Mizushige
- Department of Applied Biological Chemistry, School of Agriculture, Utsunomiya University, 350 Minemachi, Utsunomiya, Tochigi, 321-8505, Japan.
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11
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Sharma S. High fat diet and its effects on cognitive health: alterations of neuronal and vascular components of brain. Physiol Behav 2021; 240:113528. [PMID: 34260890 DOI: 10.1016/j.physbeh.2021.113528] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 07/03/2021] [Accepted: 07/06/2021] [Indexed: 01/01/2023]
Abstract
It has been well recognized that intake of diets rich in saturated fats could result in development of metabolic disorders such as type 2 diabetes mellitus, obesity and cardiovascular diseases. Recent studies have suggested that intake of high fat diet (HFD) is also associated with cognitive dysfunction. Various preclinical studies have demonstrated the impact of short and long term HFD feeding on the biochemical and behavioural alterations. This review summarizes studies and the protocols used to assess the impacts of HFD feeding on cognitive performance in rodents. Further, it discuss the key mechanisms that are altered by HFD feeding, such as, insulin resistance, oxidative stress, neuro-inflammation, transcriptional dysregulation and loss of synaptic plasticity. Along with these, HFD feeding also alters the vascular components of brain such as loss of BBB integrity and reduced cerebral blood flow. It is highly possible that these factors are responsible for the development of cognitive deficits as a result of HFD feeding.
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Affiliation(s)
- Sorabh Sharma
- Division of Medical Sciences, University of Victoria, PO Box 1700 STN CSC, Victoria, BC, V8W2Y2, Canada.
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12
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Daroit DJ, Brandelli A. In vivo bioactivities of food protein-derived peptides – a current review. Curr Opin Food Sci 2021. [DOI: 10.1016/j.cofs.2021.01.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Sasai M, Kato M, Ohsawa K, Sashihara K, Nakamura Y, Kaneko T. Effects of a single dose of tablets containing lactononadecapeptide on cognitive function in healthy adults: a randomized, double-blind, cross-over, placebo-controlled trial. Biosci Biotechnol Biochem 2021; 85:948-956. [PMID: 33580692 DOI: 10.1093/bbb/zbaa117] [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: 10/13/2020] [Accepted: 12/14/2020] [Indexed: 11/12/2022]
Abstract
Lactononadecapeptide (LNDP; NIPPLTQTPVVVPPFLQPE) is a memory-improving peptide. The current study aimed to determine the effects of a single dose of tablets containing LNDP on cognitive function in healthy Japanese men aged 30-59 years. A randomized, double-blind, cross-over, placebo-controlled trial was conducted in participants randomly assigned to receive LNDP or placebo tablets. The Uchida-Kraepelin test was used to induce cognitive load in participants as a model of work load. Cognitive function was evaluated using the Japanese version of the CNS Vital Signs. Composite memory and verbal memory were significantly higher following consumption of LNDP than placebo tablets. Carryover effects were observed in attention and concentration domains so that period 1 data was analyzed. LNDP consumption led to higher processing speed, executive function, and cognitive flexibility than placebo. Thus, supplementation with a single dose of LNDP tablets may improve cognitive functions including memory, attention, concentration, and information processing in daily life.
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Affiliation(s)
- Masaki Sasai
- Core Technology Laboratories, Asahi Quality and Innovations, Ltd., Ibaraki, Japan
| | - Megumi Kato
- Core Technology Laboratories, Asahi Quality and Innovations, Ltd., Ibaraki, Japan
| | - Kazuhito Ohsawa
- Core Technology Laboratories, Asahi Quality and Innovations, Ltd., Ibaraki, Japan
| | - Koichi Sashihara
- Core Technology Laboratories, Asahi Quality and Innovations, Ltd., Ibaraki, Japan
| | - Yasunori Nakamura
- Core Technology Laboratories, Asahi Quality and Innovations, Ltd., Ibaraki, Japan
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Tulipano G. Role of Bioactive Peptide Sequences in the Potential Impact of Dairy Protein Intake on Metabolic Health. Int J Mol Sci 2020; 21:E8881. [PMID: 33238654 PMCID: PMC7700308 DOI: 10.3390/ijms21228881] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/19/2020] [Accepted: 11/19/2020] [Indexed: 02/07/2023] Open
Abstract
For years, there has been an increasing move towards elucidating the complexities of how food can interplay with the signalling networks underlying energy homeostasis and glycaemic control. Dairy foods can be regarded as the greatest source of proteins and peptides with various health benefits and are a well-recognized source of bioactive compounds. A number of dairy protein-derived peptide sequences with the ability to modulate functions related to the control of food intake, body weight gain and glucose homeostasis have been isolated and characterized. Their being active in vivo may be questionable mainly due to expected low bioavailability after ingestion, and hence their real contribution to the metabolic impact of dairy protein intake needs to be discussed. Some reports suggest that the differential effects of dairy proteins-in particular whey proteins-on mechanisms underlying energy balance and glucose-homeostasis may be attributed to their unique amino acid composition and hence the release of free amino acid mixtures enriched in essential amino acids (i.e., branched-chain-amino acids) upon digestion. Actually, the research reports reviewed in this article suggest that, among a number of dairy protein-derived peptides isolated and characterized as bioactive compounds in vitro, some peptides can be active in vivo post-oral administration through a local action in the gut, or, alternatively, a systemic action on specific molecular targets after entering the systemic circulation. Moreover, these studies highlight the importance of the enteroendocrine system in the cross talk between food proteins and the neuroendocrine network regulating energy balance.
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Affiliation(s)
- Giovanni Tulipano
- Unit of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
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Dipeptide tyrosyl-leucine exhibits antidepressant-like activity in mice. Sci Rep 2020; 10:2257. [PMID: 32042019 PMCID: PMC7010778 DOI: 10.1038/s41598-020-59039-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/23/2020] [Indexed: 12/11/2022] Open
Abstract
Depression is a worldwide health problem. In the present study, we found that a dipeptide, tyrosyl leucine (Tyr-Leu, YL), administered orally, intracerebroventricularly, or intraperitoneally exhibited a potent antidepressant-like activity in the forced swim and tail suspension tests in naïve mice. YL increased the amount of cells expressing c-Fos, a marker for neuronal activity, in the dentate gyrus of the hippocampus. YL increased bromo-2′-deoxyuridine-positive cells and doublecortin expression in the dentate gyrus of the hippocampus, suggesting that YL enhanced the proliferation of hippocampal progenitor cells in vivo and in vitro. YL did not affect hippocampal mRNA and protein expression of BDNF, which is a regulatory factor of both neurogenesis and depression-like behavior. Intriguingly, YL suppressed activation of the hypothalamo-pituitary-adrenal axis by forced swim stress. Moreover, other aromatic amino acid-leucines, Phe-Leu and Trp-Leu, also exhibited antidepressant-like activities, suggesting that the structure of aromatic amino acid-leucine may be important for antidepressant activity. In addition, bovine milk casein-derived peptide, Tyr-Leu-Gly (YLG), an anxiolytic peptide, exhibited an antidepressant-like activity. Our findings demonstrate that YL exhibits an antidepressant-like effect, moderates the stress response, and induces hippocampal neuronal proliferation through a signal pathway independent of BDNF.
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