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Niranjan PK, Bahadur S. Recent Developments in Drug Targets and Combination Therapy for the Clinical Management of Hypertension. Cardiovasc Hematol Disord Drug Targets 2023; 23:226-245. [PMID: 38038000 DOI: 10.2174/011871529x278907231120053559] [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: 09/27/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 12/02/2023]
Abstract
Raised blood pressure is the most common complication worldwide that may lead to atherosclerosis and ischemic heart disease. Unhealthy lifestyles, smoking, alcohol consumption, junk food, and genetic disorders are some of the causes of hypertension. To treat this condition, numerous antihypertensive medications are available, either alone or in combination, that work via various mechanisms of action. Combinational therapy provides a certain advantage over monotherapy in the sense that it acts in multi mechanism mode and minimal drug amount is required to elicit the desired therapeutic effect. Such therapy is given to patients with systolic blood pressure greater than 20 mmHg and/or diastolic blood pressure exceeding 10 mmHg beyond the normal range, as well as those suffering from severe cardiovascular disease. The selection of antihypertensive medications, such as calcium channel blockers, angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), and low-dose diuretics, hinges on their ability to manage blood pressure effectively and reduce cardiovascular disease risks. This review provides insights into the diverse monotherapy and combination therapy approaches used for elevated blood pressure management. In addition, it offers an analysis of combination therapy versus monotherapy and discusses the current status of these therapies, from researchbased findings to clinical trials.
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Affiliation(s)
| | - Shiv Bahadur
- Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India
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2
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Tong LT, Xiao T, Wang L, Lu C, Liu L, Zhou X, Wang A, Qin W, Wang F. Plant protein reduces serum cholesterol levels in hypercholesterolemia hamsters by modulating the compositions of gut microbiota and metabolites. iScience 2021; 24:103435. [PMID: 34927019 PMCID: PMC8649741 DOI: 10.1016/j.isci.2021.103435] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 07/10/2021] [Accepted: 11/10/2021] [Indexed: 01/06/2023] Open
Abstract
Plant proteins exert effects of reducing cardio-cerebrovascular disease-related mortality partly via cholesterol-lowering, which was associated with gut microbiota. Here, we verify that there are significant differences in cholesterol levels among hamsters consuming different proteins. The decisive roles of gut microbiota in regulating host cholesterol are illustrated by the fact that the difference in serum cholesterol levels between hamsters feeding with pea protein and pork protein disappeared when treated with antibiotics. The results of cross-over intervention of pea and pork protein show that serum cholesterol levels are reversed with dietary exchange. The corresponding changes in microbiota suggest that Muribaculaceae are responsible for the inhibitory effect of pea protein on serum cholesterol level, whereas the opposite effect of pork protein is due to Erysipelotrichaceae. Moreover, pea protein supplement alters cecal metabolites including arginine/histidine pathway, primary bile acid biosynthesis, short-chain fatty acids, and other lipid-like molecules involved in cholesterol metabolism.
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Affiliation(s)
- Li-Tao Tong
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Tianzhen Xiao
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Lili Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Cong Lu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Liya Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Xianrong Zhou
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Aixia Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Wanyu Qin
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
| | - Fengzhong Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Ministry of Agriculture, Beijing, 100193, China
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3
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Yuan X, Minobe Y, Tanaka Y, Fukuda Y, Furukawa Y, Miyago M, Mizokami T, Tsai WT, Jiang Z, Tong LT, Akasaka T, Shirouchi B, Toyosawa Y, Kumamaru T, Sato M. α-globulin-rich rice cultivar, low glutelin content-1 (LGC-1), decreases serum cholesterol concentration in exogenously hypercholesterolemic rats. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:6417-6423. [PMID: 33982308 DOI: 10.1002/jsfa.11312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 01/19/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Rice α-globulin has been reported to have serum cholesterol-lowering activity in rats. However, it is still unclear whether α-globulin exerts this effect when taken as one of the dietary components. In the present study, we investigated the effect of two cultivars of rice, low glutelin content (LGC)-1 and LGC-Jun, on reducing serum cholesterol in exogenously hypercholesterolemic (ExHC) rats. LGC-1 is enriched in α-globulin (10.6 mg g-1 rice flour, which is an approximately 1.5 times higher α-globulin content than in Koshihikari a predominant rice cultivar in Japan), whereas LGC-Jun is a globulin-negative cultivar. METHODS ExHC rats, the model strain of diet-induced hypercholesterolemia, were fed 50% LGC-1 or LGC-Jun and 0.5% cholesterol-containing diets for 2 weeks, followed by measurement of cholesterol metabolism parameters in serum and tissues. RESULTS Serum cholesterol and non-high-density lipoprotein cholesterol levels were significantly lower in the LGC-1 group compared to the LGC-Jun group. Cholesterol intestinal absorption markers, hepatic and serum levels of campesterol and β-sitosterol, and lymphatic cholesterol transport were not different between the two groups. Levels of 7α-hydroxycholesterol, an intermediate of bile acid synthesis, showed a downward trend in the livers of rats that were fed LGC-1 (P = 0.098). There was a significant decrease in the hepatic mRNA expression of Cyp7a1 (a synthetic enzyme for 7α-hydroxycholesterol) in the LGC-1 group compared to the LGC-Jun group. CONCLUSION Dietary LGC-1 significantly decreased serum cholesterol levels in ExHC rats. The possible mechanism for the cholesterol-lowering activity of LGC-1 is partial inhibition of bile acid and cholesterol synthesis in the liver. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Xingyu Yuan
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Yutaro Minobe
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Yasutake Tanaka
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Yumi Fukuda
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Yumiko Furukawa
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Motonori Miyago
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Takuya Mizokami
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Wei-Ting Tsai
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Zhe Jiang
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Li-Tao Tong
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Taiki Akasaka
- Center for Advanced Instrumental and Educational Supports, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Bungo Shirouchi
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
| | - Yoshiko Toyosawa
- Laboratory of Plant Genetic Resources, Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Toshihiro Kumamaru
- Laboratory of Plant Genetic Resources, Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka, Japan
| | - Masao Sato
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Fukuoka, Japan
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Kadowaki M, Kubota M, Watanabe R. Physiological Multifunctions of Rice Proteins of Endosperm and Bran. J Nutr Sci Vitaminol (Tokyo) 2020; 65:S42-S47. [PMID: 31619644 DOI: 10.3177/jnsv.65.s42] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Although it is considered a staple food, rice intake is under serious debate for its physiological usefulness, especially for diabetic patients, because of starch content. However, rice protein, the second major component of rice, has gained attention recently for its newly-discovered functions, which were previously unknown. Rice protein, a plant protein, shows multiple beneficial functions on lipid metabolism and diabetes and its complications, nephropathy, fatty liver and osteoporosis. Rice proteins of endosperm and bran, an ingredient of white rice and an unused product of brown rice, respectively, are valuable components for human health.
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Affiliation(s)
- Motoni Kadowaki
- Faculty of Agriculture, Niigata University.,Fuculty of Engineering, Niigata Institute of Technology
| | | | - Reiko Watanabe
- Department of Health and Nutrition, University of Niigata Prefecture
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Sen S, Chakraborty R, Kalita P. Rice - not just a staple food: A comprehensive review on its phytochemicals and therapeutic potential. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.01.022] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Tong L, Ju Z, Liu L, Wang L, Zhou X, Xiao T, Zhou S. Rice-derived peptide AAGALPS inhibits TNF-α-induced inflammation and oxidative stress in vascular endothelial cells. Food Sci Nutr 2020; 8:659-667. [PMID: 31993189 PMCID: PMC6977420 DOI: 10.1002/fsn3.1354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/19/2019] [Accepted: 11/25/2019] [Indexed: 01/13/2023] Open
Abstract
Injury of vascular endothelial cell is one of the main factors triggering atherosclerosis. Peptide AAGALPS was derived from digestion and absorption product of rice α-globulin, which was proved to prevent atherosclerosis in previous study. This study aims to investigate the potential effects of AAGALPS on improving tumor necrosis factor-α (TNF-α)-stimulated human umbilical vein endothelial cells' (HUVECs) injury. As a result, the viability of HUVECs stimulated by tumor necrosis factor-α was significantly increased by AAGALPS in a dose-dependent manner until 25 μg/ml. The peptide obviously reduced the levels of intercellular adhesion molecule-1, vascular cell adhesion molecule-1, nitric oxide, inducible nitric oxide synthase, reactive oxygen species, and malondialdehyde and increased the concentrations of glutathione peroxidase. Furthermore, AAGALPS inhibited the nuclear factor κB (NF-κB) activation and nuclear translocation through regulating inhibitor of nuclear factor κB kinase α and inhibitor of NF-κB. These results indicated that AAGALPS protected vascular endothelial cells through mediating inflammation and oxidative stress.
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Affiliation(s)
- Li‐Tao Tong
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
| | - Zhiyuan Ju
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
| | - Liya Liu
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
| | - Lili Wang
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
| | - Xianrong Zhou
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
| | - Tianzhen Xiao
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
| | - Sumei Zhou
- Institute of Agro‐Products Processing Science and TechnologyChinese Academy of Agricultural Sciences/Key Laboratory of Agro‐Products ProcessingMinistry of AgricultureBeijingChina
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Tong LT, Ju Z, Wang L, Qiu J, Liu L, Zhou X, Liang T, Geng D, Zhou S. Peptides derived from rice α-globulin reduce atherosclerosis in apolipoprotein E-deficient mice by inhibiting TNF-α-induced vascular endothelial cells injury. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.103582] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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8
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Sun NX, Tong LT, Liang TT, Wang LL, Liu LY, Zhou XR, Zhou SM. Effect of Oat and Tartary Buckwheat - Based Food on Cholesterol - Lowering and Gut Microbiota in Hypercholesterolemic Hamsters. J Oleo Sci 2019; 68:251-259. [PMID: 30760672 DOI: 10.5650/jos.ess18221] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The nutritional components in oat and tartary buckwheat had been assessed to have cholesterollowering effects. However, The effect of oat and tartary buckwheat based-food (OF) on cholesterol-lowering and gut microbiota in hypercholesterole hamsters was still limited studied because they are usually consumed in whole gran as well as after being processed. In this study, normal diets, high fat diet (HFD) with/without OF were fed to hamsters for 30 days respectively and growth parameters, metabolic parameters, and gut microbiota were investigated, respectively. It was found that OF significantly decreased plasma total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-cholesterol), lowered liver TC, cholesterol ester (CE), and triglycerides (TG) concentrations, and increased fecal weight and bile acids (BA) concentrations, compared with HFD (p < 0.05). Moreover, the concentrations of acetate, propionate, butyrate and total short-chain fatty acids (SCFAs) were significantly increased in hamsters fed with OF, compared with HFD (p < 0.05). OF changed the overall structure of gut microbiota. The relative abundances of Erysipelotrichaceae, Ruminococcaceae, and Lachnospiraceae were decreased and the relative abundance of Eubacteriaceae was increased, compared with HFD. These results suggested that OF could reduce the concentrations of plasma lipid by inhibiting cholesterol absorption in liver and promoting excretions of fecal lipid and BA. And it also increased SCFAs and modulated the gut microbiota effectively to exert the hypocholesterolemic effects.
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Affiliation(s)
- Nian-Xia Sun
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture
| | - Li-Tao Tong
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture
| | - Ting-Ting Liang
- School of Food and Biological Engineering, Shanxi University of Science and Technology
| | - Li-Li Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture
| | - Li-Ya Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture
| | - Xian-Rong Zhou
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture
| | - Su-Mei Zhou
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture
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Ina S, Hamada A, Kaneko T, Nakajima N, Yamaguchi Y, Akao M, Kumagai H, Kumagai H. Physicochemical and Surface Properties of Rice Albumin for its Application as a Functional Food Material. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2019. [DOI: 10.3136/fstr.25.555] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Shigenobu Ina
- Department of Chemistry and Life Science, Nihon University
| | - Aya Hamada
- Department of Chemistry and Life Science, Nihon University
| | | | | | | | - Makoto Akao
- Department of Chemistry and Life Science, Nihon University
| | - Hitoshi Kumagai
- Department of Food Science and Nutrition, Kyoritsu Women's University
| | - Hitomi Kumagai
- Department of Chemistry and Life Science, Nihon University
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10
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Xia X, Xing Y, Li G, Wu J, Kan J. Antioxidant activity of whole grain Qingke (Tibetan Hordeum vulgare L.) toward oxidative stress in d-galactose induced mouse model. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.04.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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11
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Souza DD, Sbardelotto AF, Ziegler DDR, Pinto LMN, Ramos RCDS, Marczak LDF, Tessaro IC. Obtaining and purification of a highly soluble hydrolyzed rice endosperm protein. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.03.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Tong LT, Ju Z, Qiu J, Wang L, Liu L, Zhou X, Zhou S. Peptide GEQQQQPGM derived from rice α-globulin reduces the risk of atherosclerosis in hamsters by improving vascular endothelial cells injury. RSC Adv 2017. [DOI: 10.1039/c7ra08304a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The amino acid sequence of the peptide, GEQQQQPGM was determined by LC-mass spectrometry (MS)/MS.
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Affiliation(s)
- Li-Tao Tong
- Institute of Agro-Products Processing Science and Technology
- Chinese Academy of Agricultural Sciences
- Key Laboratory of Agro-Products Processing
- Ministry of Agriculture
- Beijing
| | - Zhiyuan Ju
- Institute of Agro-Products Processing Science and Technology
- Chinese Academy of Agricultural Sciences
- Key Laboratory of Agro-Products Processing
- Ministry of Agriculture
- Beijing
| | - Ju Qiu
- Institute of Food and Nutrition Development
- Ministry of Agriculture
- Beijing 100081
- China
| | - Lili Wang
- Institute of Agro-Products Processing Science and Technology
- Chinese Academy of Agricultural Sciences
- Key Laboratory of Agro-Products Processing
- Ministry of Agriculture
- Beijing
| | - Liya Liu
- Institute of Agro-Products Processing Science and Technology
- Chinese Academy of Agricultural Sciences
- Key Laboratory of Agro-Products Processing
- Ministry of Agriculture
- Beijing
| | - Xianrong Zhou
- Institute of Agro-Products Processing Science and Technology
- Chinese Academy of Agricultural Sciences
- Key Laboratory of Agro-Products Processing
- Ministry of Agriculture
- Beijing
| | - Sumei Zhou
- Institute of Agro-Products Processing Science and Technology
- Chinese Academy of Agricultural Sciences
- Key Laboratory of Agro-Products Processing
- Ministry of Agriculture
- Beijing
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Hosojima M, Kaseda R, Kondo H, Fujii M, Kubota M, Watanabe R, Tanabe N, Kadowaki M, Suzuki Y, Saito A. Beneficial effects of rice endosperm protein intake in Japanese men with risk factors for metabolic syndrome: a randomized, crossover clinical trial. BMC Nutr 2016. [DOI: 10.1186/s40795-016-0065-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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14
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Characterization of rice starch and protein obtained by a fast alkaline extraction method. Food Chem 2016; 191:36-44. [DOI: 10.1016/j.foodchem.2015.03.032] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 03/05/2015] [Accepted: 03/10/2015] [Indexed: 11/15/2022]
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15
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Ishikawa Y, Hira T, Inoue D, Harada Y, Hashimoto H, Fujii M, Kadowaki M, Hara H. Rice protein hydrolysates stimulate GLP-1 secretion, reduce GLP-1 degradation, and lower the glycemic response in rats. Food Funct 2015; 6:2525-34. [PMID: 26107658 DOI: 10.1039/c4fo01054j] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Rice has historically been consumed in Asia as a major source of carbohydrates, however, little is known regarding the functional roles of rice proteins as dietary factors. In the present study, we investigated whether peptides derived from rice proteins could stimulate GLP-1 secretion, which results in reducing glycemia via the incretin effect in normal rats. Hydrolysates were prepared from the protein fraction of rice endosperm or rice bran, and the effects of these hydrolysates on GLP-1 secretion were examined in a murine enteroendocrine cell line GLUTag. Plasma was collected after oral administration of the rice protein hydrolysates, under anesthesia, or during glucose tolerance tests in rats. In anesthetized rats, plasma dipeptidyl peptidase-IV (DPP-IV) activity was measured after ileal administration of the rice protein hydrolysates. GLP-1 secretion from GLUTag cells was potently stimulated by the rice protein hydrolysates, especially by the peptic digest of rice endosperm protein (REPH) and that of rice bran protein (RBPH). Oral administration of REPH or RBPH elevated plasma GLP-1 concentrations, which resulted in the reduction of glycemia under the intraperitoneal glucose tolerance test. In addition, the plasma DPP-IV activity was attenuated after ileal administration of REPH or RBPH, which resulted in a higher ratio of intact (active) GLP-1 to total GLP-1 in the plasma. These results demonstrate that rice proteins exert potent stimulatory effects on GLP-1 secretion, which could contribute to the reduction of postprandial glycemia. The inhibitory effect of these peptides on the plasma DPP-IV activity may potentiate the incretin effect of GLP-1.
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Affiliation(s)
- Yuki Ishikawa
- Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
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Burlando B, Cornara L. Therapeutic properties of rice constituents and derivatives (Oryza sativa L.): A review update. Trends Food Sci Technol 2014. [DOI: 10.1016/j.tifs.2014.08.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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