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Nakashio M, Ohgitani E, Shin-Ya M, Kawamoto M, Ichitani M, Kobayashi M, Takihara T, Kinugasa H, Ishikura H, Mazda O. Milk Casein Inhibits Effect of Black Tea Galloylated Theaflavins to Inactivate SARS-CoV-2 In Vitro. Bioengineering (Basel) 2023; 10:1068. [PMID: 37760169 PMCID: PMC10526027 DOI: 10.3390/bioengineering10091068] [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: 08/19/2023] [Revised: 09/01/2023] [Accepted: 09/03/2023] [Indexed: 09/29/2023] Open
Abstract
Continuing caution is required against the potential emergence of SARS-CoV-2 novel mutants that could pose the next global health and socioeconomical threats. If virus in saliva can be inactivated by a beverage, such a beverage may be useful because the saliva of infected persons is the major origin of droplets and aerosols that mediate human-to-human viral transmission. We previously reported that SARS-CoV-2 was significantly inactivated by treatment in vitro with tea including green tea and black tea. Catechins and its derived compounds galloylated theaflavins (gTFs) bound to the receptor-binding domain (RBD) of the S-protein and blocked interaction between RBD and ACE2. Black tea is often consumed with sugar, milk, lemon juice, etc., and it remains unclarified whether these ingredients may influence the anti-SARS-CoV-2 effect of black tea. Here, we examined the effect of black tea on Omicron subvariants in the presence of these ingredients. The infectivity of Omicron subvariants was decreased to 1/100 or lower after treatment with black tea for 10 s. One or two teaspoons of milk (4~8 mL) completely blocked the anti-viral effect of a cup of tea (125 mL), whereas an addition of sugar or lemon juice failed to do so. The suppressive effect was dose-dependently exerted by milk casein but not whey proteins. gTFs were coprecipitated with casein after acidification of milk-supplemented black tea, strongly suggesting the binding of gTFs to casein. The present study demonstrates for the first time that an addition of milk cancelled the anti-SARS-CoV-2 effect of black tea due to binding of casein to gTFs.
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Affiliation(s)
- Maiko Nakashio
- Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (M.N.)
- Department of Emergency and Critical Care Medicine, Faculty of Medicine, Fukuoka University, Fukuoka 814-0180, Japan
| | - Eriko Ohgitani
- Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (M.N.)
| | - Masaharu Shin-Ya
- Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (M.N.)
- Department of Molecular Anti-Virus Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
| | - Masaya Kawamoto
- Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (M.N.)
| | - Masaki Ichitani
- Department of Molecular Anti-Virus Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
- Central Research Institute, ITO EN, Ltd., Shizuoka 421-0516, Japan
| | - Makoto Kobayashi
- Central Research Institute, ITO EN, Ltd., Shizuoka 421-0516, Japan
| | | | - Hitoshi Kinugasa
- Central Research Institute, ITO EN, Ltd., Shizuoka 421-0516, Japan
| | - Hiroyasu Ishikura
- Department of Emergency and Critical Care Medicine, Faculty of Medicine, Fukuoka University, Fukuoka 814-0180, Japan
| | - Osam Mazda
- Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan; (M.N.)
- Department of Molecular Anti-Virus Immunology, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
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Wang Y, Bai H, Wang S, Wang R, Wang Z. Casein phosphopeptide-calcium chelate: Preparation, calcium holding capacity and simulated digestion in vitro. Food Chem 2022; 401:134218. [PMID: 36115235 DOI: 10.1016/j.foodchem.2022.134218] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 09/01/2022] [Accepted: 09/09/2022] [Indexed: 10/14/2022]
Abstract
In this work, CPP-Ca chelate was synthesized by chelating casein phosphopeptide (CPP) and calcium and characterized by Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) Energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The antioxidant activity and calcium holding capacity of CPP-Ca were evaluated and its secondary structure transition was monitored during gastrointestinal digestion by in situ Raman spectroscopy. The results demonstrated that calcium chelating rate reached 40 % and calcium ion was bound to CPP mainly through the interaction of carboxyl and amino groups. The result of calcium holding capacity confirmed the formation of calcium phosphate precipitates could be delayed by 10-15 min with increasing CPP concentration. In vitro simulated digestion revealed CPP-Ca exhibited excellent calcium solubility and its secondary structural changes occurred, especially α-helix and β-sheet content. These findings provided significant insights into enhancing bioavailability of calcium supplements and developing of calcium functional foods for human and animals.
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Affiliation(s)
- Ying Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Huasong Bai
- Nourse Science Centre for Pet Nutrition, Wuhu 241200, China
| | - Songjun Wang
- Nourse Science Centre for Pet Nutrition, Wuhu 241200, China
| | - Ruixue Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhanzhong Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; Nourse Science Centre for Pet Nutrition, Wuhu 241200, China.
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Han Y, Pan J, Ma Y, Zhou D, Xu W. Protein-based biomaterials for combating viral infections: current status and future prospects for development. BIOSAFETY AND HEALTH 2022. [DOI: 10.1016/j.bsheal.2022.03.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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WANG S, ZHOU D, LIN H. Ameliorative effects of phosphorylated peptide from Antarctic krill (Euphausia superba) against H2O2-induced damage in MC3T3-E1 cells. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.64920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | - Deqing ZHOU
- Chinese Academy of Fishery Sciences, China; Pilot National Laboratory for Marine Science and Technology, China
| | - Haiyan LIN
- Chinese Academy of Fishery Sciences, China
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Lebetwa N, Suzuki Y, Tanaka S, Nakamura S, Katayama S. Enhanced Anti-Allergic Activity of Milk Casein Phosphopeptide by Additional Phosphorylation in Ovalbumin-Sensitized Mice. Molecules 2019; 24:molecules24040738. [PMID: 30791382 PMCID: PMC6412743 DOI: 10.3390/molecules24040738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/11/2019] [Accepted: 02/17/2019] [Indexed: 01/07/2023] Open
Abstract
The proteolytic digest of milk casein, known as casein phosphopeptide (CPP-III), exhibits diverse biological activities, including calcium absorption and antioxidant activities. We hypothesized that the additional phosphorylation of this peptide can enhance its immunomodulatory activity such as suppression of allergy-associated cytokine and antigen-specific immune response. This study was conducted to assess whether oral intake of additionally phosphorylated CPP-III (P-CPP) attenuates ovalbumin (OVA)-induced IgE-mediated allergic reactions because of the additional phosphate groups. Female BALB/c mice were intraperitoneally sensitized with OVA twice at intervals of 14 days and then orally fed native CPP-III (N-CPP), P-CPP, and dephosphorylated CPP-III (D-CPP) for 6 weeks. Next, the mice were orally challenged with 50 mg of OVA. Oral administration of P-CPP suppressed total and specific IgE levels in the serum. Mice fed P-CPP exhibited low levels of OVA-specific IgG1 and increased OVA-specific IgG2a. P-CPP also suppressed IL-4 production, while D-CPP showed similar a level compared to that of the control. Further, P-CPP increased the population of the T follicular helper (Tfh) cell in the spleen. These results suggest that additional phosphorylation of CPP can enhance the attenuation of allergen-specific IgE-modulated allergic reactions in a murine food allergy model.
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Affiliation(s)
- Ntshepisa Lebetwa
- Interdisciplinary Graduate School of Science and Technology, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
- Department of Agricultural Research, Animal Production and Range research Division, Ministry of Agriculture, Private bag 0033, Gaborone BO320, Botswana.
| | - Yuta Suzuki
- Faculty of Agriculture, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
| | - Sachi Tanaka
- Faculty of Agriculture, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
| | - Soichiro Nakamura
- Interdisciplinary Graduate School of Science and Technology, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
- Faculty of Agriculture, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
| | - Shigeru Katayama
- Interdisciplinary Graduate School of Science and Technology, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
- Faculty of Agriculture, Shinshu University, 8304 Minamiminowa, Ina, Nagano 399-4598, Japan.
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Katayama S, Yamaguchi D, Suzuki Y, Athamneh AMA, Mitani T, Satoh R, Teshima R, Mine Y, Nakamura S. Oral Immunotherapy with a Phosphorylated Hypoallergenic Allergen Ameliorates Allergic Responses More Effectively Than Intact Allergen in a Murine Model of Buckwheat Allergy. Mol Nutr Food Res 2018; 62:e1800303. [PMID: 30160053 DOI: 10.1002/mnfr.201800303] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 07/01/2018] [Indexed: 11/05/2022]
Abstract
SCOPE Buckwheat is a common food allergen frequently consumed in Asian countries, with Fag e 1 and Fag e 2 being the major buckwheat allergens. The purpose of this study is to prepare an oral immunotherapy agent by attenuating these allergens via phosphorylation. The immunomodulatory effects of phosphorylated Fag e 2 (P-Fag e 2) in a mouse model of buckwheat allergy are evaluated. METHODS AND RESULTS Phosphorylated Fag e 1 (P-Fag e 1) and P-Fag e 2 are prepared by dry-heating in the presence of pyrophosphate. Subsequent dot-blot analysis using serum from food-allergic patient indicates that both proteins exhibit reduced allergenicity upon phosphorylation. Mice subjected to oral administration of P-Fag e 2 for 6 weeks exhibit decreased specific serum IgE and increased specific IgA after Fag e 2 sensitization compared to the sham-treated mice. Moreover, the Peyer's patches (PP) of phosphorylated antigen-fed mice show decreased IL-4 production and induction of T follicular helper (Tfh) cells. Increased production of IL-6 is observed in the CD11c+ cells isolated from the PPs of P-Fag e 2-fed mice. CONCLUSION These results indicate that attenuated allergens can suppress Th2-induced allergic responses via induction of Tfh cells, which are regulated by IL-6 secreted from dendritic cells.
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Affiliation(s)
- Shigeru Katayama
- Department of Bioscience and Biotechnology, Shinshu University, Kamiina, Nagano, 399-4598, Japan.,Interdisciplinary Cluster for Cutting Edge, Shinshu University, Kamiina, Nagano, 399-4598, Japan
| | - Daiki Yamaguchi
- Department of Bioscience and Biotechnology, Shinshu University, Kamiina, Nagano, 399-4598, Japan
| | - Yuta Suzuki
- Department of Bioscience and Biotechnology, Shinshu University, Kamiina, Nagano, 399-4598, Japan
| | - Ahmad M Al Athamneh
- Department of Bioscience and Biotechnology, Shinshu University, Kamiina, Nagano, 399-4598, Japan.,Greater Amman Municipality, Amman, 11118, Jordan
| | - Takakazu Mitani
- Department of Bioscience and Biotechnology, Shinshu University, Kamiina, Nagano, 399-4598, Japan.,Interdisciplinary Cluster for Cutting Edge, Shinshu University, Kamiina, Nagano, 399-4598, Japan
| | - Rie Satoh
- Division of Food Function Research, Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, 305-8642, Japan
| | - Reiko Teshima
- Division of Environmental Chemistry, National Institute of Health Sciences, Setagaya-ku, Tokyo, 158-8501, Japan
| | - Yoshinori Mine
- Department of Food Science, Ontario Agricultural College, University of Guelph, Guelph, N1G 2W1, Canada
| | - Soichiro Nakamura
- Department of Bioscience and Biotechnology, Shinshu University, Kamiina, Nagano, 399-4598, Japan
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