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Shida W, Tahara Y, Morikawa S, Monde K, Koga R, Ohsugi T, Otsuka M, Ikemoto A, Tateishi H, Ikeda T, Fujita M. The unique activity of saponin: Induction of cytotoxicity in HTLV-1 infected cells. Bioorg Med Chem 2023; 91:117408. [PMID: 37453188 DOI: 10.1016/j.bmc.2023.117408] [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: 05/19/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
Infection with the retrovirus human T-cell leukemia virus type 1 (HTLV-1) sometimes causes diseases that are difficult to cure. To find anti-HTLV-1 natural compounds, we opted to screen using the HTLV-1-infected T-cell line, MT-2. Based on our results, an extract of the pulp/seeds of Akebia quinata Decaisne fruit killed MT-2 cells but did not affect the Jurkat cell line that was not infected with virus. To determine the active ingredients, seven saponins with one-six sugar moieties were isolated from A. quinata seeds, and their activities against the two cell lines were examined. Both cell lines were killed in a similar manner by Akebia saponins A and B. Further, Akebia saponins D, E, PK and G did not exhibit cytotoxicity. Akebia saponin C had a similar activity to the extract found in the screening. This compound was found to enhance Gag aggregation, induce the abnormal cleavage of Gag, suppress virion release, and preferentially kill HTLV-1 infected cells; however, their relationship remains elusive. Our findings may lead to the development of new therapies for infectious diseases based on the removal of whole-virus-infected cells.
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Affiliation(s)
- Wataru Shida
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan
| | - Yurika Tahara
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan
| | - Saki Morikawa
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan
| | - Kazuaki Monde
- Department of Microbiology, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, Kumamoto 860-8556, Japan
| | - Ryoko Koga
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan
| | - Takeo Ohsugi
- Department of Laboratory Animal Science, School of Veterinary Medicine, Rakuno-Gakuen University, 582 Bunkyodai-midorimachi, Ebetsu, Hokkaido 069-8501, Japan
| | - Masami Otsuka
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan; Department of Drug Discovery, Science Farm Ltd., 1-7-30 Kuhonji, Chuo-ku, Kumamoto, Kumamoto 862-0976, Japan
| | - Atsushi Ikemoto
- Division of Regional Studies and Clinical Psychology, Faculty of Education and Human Studies, Akita University, 1-1 Tegatagakuen-machi, Akita, Akita 010-8502, Japan
| | - Hiroshi Tateishi
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan
| | - Tsuyoshi Ikeda
- Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto, Kumamoto 860-0082, Japan.
| | - Mikako Fujita
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto, Kumamoto 862-0973, Japan.
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Amin E, Abdel-Bakky MS, Mohammed HA, Hassan MHA. Chemical Profiling and Molecular Docking Study of Agathophora alopecuroides. LIFE (BASEL, SWITZERLAND) 2022; 12:life12111852. [PMID: 36430987 PMCID: PMC9696702 DOI: 10.3390/life12111852] [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: 10/18/2022] [Revised: 11/02/2022] [Accepted: 11/07/2022] [Indexed: 11/16/2022]
Abstract
Natural products continue to provide inspiring chemical moieties that represent a key stone in the drug discovery process. As per our previous research, the halophyte Agathophora alopecuroides was noted as a potential antidiabetic plant. However, the chemical profiling and highlighting the metabolite(s) responsible for the observed antidiabetic activity still need to be investigated. Accordingly, the present study presents the chemical profiling of this species using the LC-HRMS/MS technique followed by a study of the ligand-protein interaction using the molecular docking method. LC-HRMS/MS results detected twenty-seven compounds in A. alopecuroides extract (AAE) belonging to variable chemical classes. Among the detected compounds, alkaloids, flavonoids, lignans, and iridoids were the most prevailing. In order to highlight the bioactive compounds in AAE, the molecular docking technique was adopted. Results suggested that the two alkaloids (Eburnamonine and Isochondrodendrine) as well as the four flavonoids (Narirutin, Pelargonidin 3-O-rutinoside, Sophora isoflavanone A, and Dracorubin) were responsible for the observed antidiabetic activity. It is worth mentioning that this is the first report for the metabolomic profiling of A. alopecuroides as well as the antidiabetic potential of Isochondrodendrine, Sophora isoflavanone A, and Dracorubin that could be a promising target for an antidiabetic drug.
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Affiliation(s)
- Elham Amin
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mohamed Sadek Abdel-Bakky
- Department of Pharmacology and Toxicology, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Cairo 11751, Egypt
| | - Hamdoon A. Mohammed
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Pharmacognosy and Medicinal Plants, Faculty of Pharmacy, Al-Azhar University, Cairo 11751, Egypt
| | - Marwa H. A. Hassan
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt
- Correspondence: or ; Tel.: +2-012-7898-2288; Fax: +2-(082)-2317958
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Yuan W, Huang Z, Xiao S, Zhang Y, Chen W, Ye J, Xu X, Zu X, Shen Y. Systematic analysis of chemical profiles of Sophorae tonkinensis Radix et Rhizoma in vitro and in vivo by UPLC-Q-TOF-MS E. Biomed Chromatogr 2022; 36:e5357. [PMID: 35191054 DOI: 10.1002/bmc.5357] [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: 07/15/2021] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 11/06/2022]
Abstract
Sophorae tonkinensis Radix et Rhizoma (S. tonkinensis) has been recorded as a "poisonous" Chinese herbal medicine in Chinese Pharmacopoeia 2020. The clinical reaction reports of S. tonkinensis indicated its neurotoxicity, there exists still dispute about its toxic substances. At present, there is no report on the blood and brain prototype research of S. tonkinensis. Most studies focused on alkaloids, and less on other compounds. Moreover, the constituents absorbed into the blood and brain were rarely investigated so far. In this study, a rapid and efficient qualitative analysis method was established by UPLC-Q-TOF-MSE to characterize S. tonkinensis ingredients and those entering into the rat body after oral administration. A total of 91 compounds were identified in S. tonkinensis, of which 28 were confirmed by the standards. 30 and 19 prototypes were also firstly identified in rat blood and brain, respectively. It was found that except for alkaloids, most flavonoids were detected in the rat body and distributed in the cerebrospinal fluid, suggesting that flavonoids may be one of the important toxic or effective substances of S. tonkinensis, which provides new clues and data for clarifying its toxicity or efficacy of the medical plant.
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Affiliation(s)
- Wenlin Yuan
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
| | - Zhengrui Huang
- Department of Applied Chemistry, Xi'an University of Technology, Xi'an, China
| | - Sijia Xiao
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
| | - Yuhao Zhang
- Interdisciplinary Science Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wei Chen
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
| | - Ji Ye
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
| | - Xike Xu
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
| | - Xianpeng Zu
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
| | - Yunheng Shen
- Department of Natural Medicinal Chemistry, School of Pharmacy, Naval Medical University, Shanghai, China
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Yates PS, Roberson J, Ramsue LK, Song BH. Bridging the Gaps between Plant and Human Health: A Systematic Review of Soyasaponins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:14387-14401. [PMID: 34843230 DOI: 10.1021/acs.jafc.1c04819] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Saponins, prominent secondary plant metabolites, are recognized for their roles in plant defense and medicinal benefits. Soyasaponins, commonly derived from legumes, are a class of triterpenoid saponins that demonstrate significant potential for plant and human health applications. Previous research and reviews largely emphasize human health effects of soyasaponins. However, the biological effects of soyasaponins and their implications for plants in the context of human health have not been well-discussed. This review provides comprehensive discussions on the biological roles of soyasaponins in plant defense and rhizosphere microbial interactions; biosynthetic regulation and compound production; immunological effects and potential for therapeutics; and soyasaponin acquisition attributed to processing effects, bioavailability, and biotransformation processes based on recent soyasaponin research. Given the multifaceted biological effects elicited by soyasaponins, further research warrants an integrated approach to understand molecular mechanisms of regulations in their production as well as their applications in plant and human health.
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Affiliation(s)
- Ping S Yates
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, North Carolina 28262, United States
| | - Julia Roberson
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, North Carolina 28262, United States
| | - Lyric K Ramsue
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, North Carolina 28262, United States
| | - Bao-Hua Song
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, North Carolina 28262, United States
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Xiong F, Zheng Z, Xiao L, Su C, Chen J, Gu X, Tang J, Zhao Y, Luo H, Zha L. Soyasaponin A 2 Alleviates Steatohepatitis Possibly through Regulating Bile Acids and Gut Microbiota in the Methionine and Choline-Deficient (MCD) Diet-induced Nonalcoholic Steatohepatitis (NASH) Mice. Mol Nutr Food Res 2021; 65:e2100067. [PMID: 34047448 DOI: 10.1002/mnfr.202100067] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/21/2021] [Indexed: 12/21/2022]
Abstract
SCOPE Nonalcoholic steatohepatitis (NASH) is a chronic progressive disease with complex pathogenesis of which the bile acids (BAs) and gut microbiota are involved. Soyasaponins (SS) exhibits many health-promoting effects including hepatoprotection, but its prevention against NASH is unclear. This study aims to investigate the preventive bioactivities of SS monomer (SS-A2 ) against NASH and further clarify its mechanism by targeting the BAs and gut microbiota. METHODS AND RESULTS The methionine and choline deficient (MCD) diet-fed male C57BL/6 mice were intervened with obeticholic acid or SS-A2 for 16 weeks. Hepatic pathology is assessed by hematoxylin-eosin and Masson's trichrome staining. BAs in serum, liver, and colon are measured by ultra-performance liquid chromatography coupled with triple quadrupole mass spectrometry (UPLC-TQMS). Gut microbiota in caecum are determined by 16S rDNA amplicon sequencing. In the MCD diet-induced NASH mice, SS-A2 significantly reduces hepatic steatosis, lobular inflammation, ballooning, nonalcoholic fatty liver disease activity score (NAS) scores, and fibrosis, decreases Erysipelotrichaceae (Faecalibaculum) and Lactobacillaceae (Lactobacillus) and increases Desulfovibrionaceae (Desulfovibrio). Moreover, SS-A2 reduces serum BAs accumulation and promotes fecal BAs excretion. SS-A2 changes the BAs profiles in both liver and serum and specifically increases the taurohyodeoxycholic acid (THDCA) level. Faecalibaculum is negatively correlated with serum THDCA. CONCLUSION SS-A2 alleviates steatohepatitis possibly through regulating BAs and gut microbiota in the MCD diet-induced NASH mice.
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Affiliation(s)
- Fei Xiong
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Zhongdaixi Zheng
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Lingyu Xiao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Chuhong Su
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Junbin Chen
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Xiangfu Gu
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Jiaqi Tang
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Yue Zhao
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Huiyu Luo
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
| | - Longying Zha
- Department of Nutrition and Food Hygiene, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, 510515, P. R. China
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Singh B, Singh JP, Singh N, Kaur A. Saponins in pulses and their health promoting activities: A review. Food Chem 2017; 233:540-549. [PMID: 28530610 DOI: 10.1016/j.foodchem.2017.04.161] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/04/2017] [Accepted: 04/25/2017] [Indexed: 01/17/2023]
Abstract
Saponins are a class of natural compounds present in pulses having surface active properties. These compounds show variation in type, structure and composition of their aglycone moiety and oligosaccharide chains. Saponins have plasma cholesterol lowering effect in humans and are important in reducing the risk of many chronic diseases. Moreover, they have shown strong cytotoxic effects against cancer cell lines. However, more epidemiological and clinical studies are required for the proper validation of these health promoting activities. Processing and cooking promotes the loss of saponins from foods. The effect of soaking, sprouting and cooking on the stability and bioavailability of saponins in pulses is an important area which should be thoroughly worked out for achieving desirable health benefits. In the present review, the structures, contents and health benefits of saponins present in pulses are discussed. Moreover, the effect of processing (of pulses) on the saponins is also highlighted.
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Affiliation(s)
- Balwinder Singh
- Department of Biotechnology, Khalsa College, Amritsar 143002, Punjab, India
| | - Jatinder Pal Singh
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Narpinder Singh
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, Punjab, India
| | - Amritpal Kaur
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
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Watanabe M, Sumida N, Yanai K, Murakami T. Cloning and Characterization of Saponin Hydrolases fromAspergillus oryzaeandEupenicillium brefeldianum. Biosci Biotechnol Biochem 2014; 69:2178-85. [PMID: 16306700 DOI: 10.1271/bbb.69.2178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We purified saponin hydrolases from Aspergillus oryzae PF1224 and Eupenicillium brefeldianum PF1226. It was confirmed that the enzymes from A. oryzae PF1224 (Sda1) and E. brefeldianum PF1226 (Sde1) are glycoproteins with molecular masses of 82 and 90 kDa respectively. The deduced amino acid sequences of each enzyme from the cloned genes (sda1 or sde1) showed approximately 50% homology with that of the saponin hydrolase Sdn1 from Neocosmospora vasinfecta var. vasinfecta PF1225 (DDBJ accession no. AB110615). When sda1 and sde1 were expressed in the host Trichoderma viride under the control of the cellobiohydrolase I gene promoter, recombinant proteins were secreted with molecular masses of 77 and 67 kDa respectively. These recombinant enzymes hydrolyzed soyasaponin I to soyasapogenol B and triose, and its substrate specificities for glycosides were similar to that of Sdn1, but the specific activities of these enzymes were lower than that of Sdn1.
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Affiliation(s)
- Manabu Watanabe
- Microbiological Resources and Technology Laboratories, Meiji Seika Kaisha, Ltd, Kanagawa, Japan.
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Shibuya M, Nishimura K, Yasuyama N, Ebizuka Y. Identification and characterization of glycosyltransferases involved in the biosynthesis of soyasaponin I in Glycine max. FEBS Lett 2010; 584:2258-64. [PMID: 20350545 DOI: 10.1016/j.febslet.2010.03.037] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 03/07/2010] [Accepted: 03/23/2010] [Indexed: 10/19/2022]
Abstract
Triterpene saponins are a diverse group of compounds with a structure consisting of a triterpene aglycone and sugars. Identification of the sugar-transferase involved in triterpene saponin biosynthesis is difficult due to the structural complexity of triterpene saponin. Two glycosyltransferases from Glycine max, designated as GmSGT2 and GmSGT3, were identified and characterized. In vitro analysis revealed that GmSGT2 transfers a galactosyl group from UDP-galactose to soyasapogenol B monoglucuronide, and that GmSGT3 transfers a rhamnosyl group from UDP-rhamnose to soyasaponin III. These results suggest that soyasaponin I is biosynthesized from soyasapogenol B by successive sugar transfer reactions.
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Affiliation(s)
- Masaaki Shibuya
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
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Gurfinkel DM, Reynolds WF, Rao AV. The isolation of soyasaponins by fractional precipitation, solid phase extraction, and low pressure liquid chromatography. Int J Food Sci Nutr 2005; 56:501-19. [PMID: 16503561 DOI: 10.1080/09637480500460601] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Bioactive soyasaponins are present in soybean (Glycine max). In this study, the isolation of soyasaponins in relatively pure form (>80%) using precipitation, solid phase extraction and reverse phase low pressure liquid chromatography (RP-LPLC) is described. Soy flour soyasaponins were separated from non-saponins by methanol extraction and precipitation with ammonium sulphate. Acetylated group A soyasaponins were isolated first by solid phase extraction followed by RP-LPLC (solvent: ethanol-water). Soyasaponins, from a commercial preparation, were saponified and fractionated into deacetylated group A and group B soyasaponins by solid phase extraction (methanol-water). Partial hydrolysis of group B soyasaponins produced a mixture of soyasaponin III and soyasapogenol B monoglucuronide. RP-LPLC of deacetylated group A soyasaponins separated soyasaponin A1 and A2 (38% methanol); of group B soyasaponins isolated soyasaponin I (50% ethanol); and of the partial hydrolysate separated soyasaponin III from soyasapogenol B monoglucuronide (50% ethanol). This methodology provides soyasaponin fractions that are suitable for biological evaluation.
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Affiliation(s)
- D M Gurfinkel
- Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, M5S 3E2, Canada
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10
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Popovich D, Kitts D. Anticancer Activity of Ginseng and Soy Saponins. NUTRITION AND CANCER PREVENTION 2005. [DOI: 10.1201/9781420026399.pt7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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11
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Relationship Between Structure and Hepatoprotector Activity of Indole Derivatives. Pharm Chem J 2005. [DOI: 10.1007/s11094-005-0115-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Gurfinkel DM, Rao AV. Soyasaponins: the relationship between chemical structure and colon anticarcinogenic activity. Nutr Cancer 2004; 47:24-33. [PMID: 14769534 DOI: 10.1207/s15327914nc4701_3] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Soyasaponins are bioactive compounds found in many legumes. Although crude soyasaponins have been shown to have anti-colon carcinogenic activity, there have been no structure-activity studies. In this study, therefore, purified soyasaponins and soyasapogenins were tested for their ability to suppress the growth of HT-29 colon cancer cells, as determined by the WST-1 assay, over a concentration range of 0-50 ppm. Soyasaponin I and III, soyasapogenol B monoglucuronide, soyasapogenol B, soyasaponin A1, soyasaponin A2, and soyasapogenol A were evaluated. Also tested were mixtures comprising acetylated group A soyasaponins, deacetylated group A soyasaponins, and group B soyasaponins. The most potent compounds were the aglycones soyasapogenol A and B, which showed almost complete suppression of cell growth. The glycosidic soyasaponins by comparison were largely inactive. Soyasaponin A(1), A(2), and I, group B and deacetylated and acetylated group A fractions had no effect on cell growth. Soyasaponin III and soyasapogenol B monoglucuronide were marginally bioactive. These results suggested that the bioactivity of soyasaponins increased with increased lipophilicity. Results from in vitro fermentation suggested that colonic microflora readily hydrolyzed the soyasaponins to aglycones. These observations suggest that the soyasaponins may be an important dietary chemopreventive agent against colon cancer, after alteration by microflora.
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Affiliation(s)
- D M Gurfinkel
- Department of Nutritional Sciences, University of Toronto, 150 College Street, Toronto, Ontario, Canada M5S 3E2
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Watanabe M, Sumida N, Yanai K, Murakami T. A novel saponin hydrolase from Neocosmospora vasinfecta var. vasinfecta. Appl Environ Microbiol 2004; 70:865-72. [PMID: 14766566 PMCID: PMC348887 DOI: 10.1128/aem.70.2.865-872.2004] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2003] [Accepted: 10/22/2003] [Indexed: 11/20/2022] Open
Abstract
We isolated a soybean saponin hydrolase from Neocosmospora vasinfecta var. vasinfecta PF1225, a filamentous fungus that can degrade soybean saponin and generate soyasapogenol B. This enzyme was found to be a monomer with a molecular mass of about 77 kDa and a glycoprotein. Nucleotide sequence analysis of the corresponding gene (sdn1) indicated that this enzyme consisted of 612 amino acids and had a molecular mass of 65,724 Da, in close agreement with that of the apoenzyme after the removal of carbohydrates. The sdn1 gene was successfully expressed in Trichoderma viride under the control of the cellobiohydrolase I gene promoter. The molecular mass of the recombinant enzyme, about 69 kDa, was smaller than that of the native enzyme due to fewer carbohydrate modifications. Examination of the degradation products obtained by treatment of soyasaponin I with the recombinant enzyme showed that the enzyme hydrolyzed soyasaponin I to soyasapogenol B and triose [alpha-L-rhamnopyranosyl (1-->2)-beta-D-galactopyranosyl (1-->2)-D-glucuronopyranoside]. Also, when soyasaponin II and soyasaponin V, which are different from soyasaponin I only in constituent saccharides, were treated with the enzyme, the ratio of the reaction velocities for soyasaponin I, soyasaponin II, and soyasaponin V was 2,680:886:1. These results indicate that this enzyme recognizes the fine structure of the carbohydrate moiety of soyasaponin in its catalytic reaction. The amino acid sequence of this enzyme predicted from the DNA sequence shows no clear homology with those of any of the enzymes involved in the hydrolysis of carbohydrates.
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Affiliation(s)
- Manabu Watanabe
- Microbiological Resources and Technology Laboratories, Meiji Seika Kaisha, Ltd., Odawara-shi, Kanagawa 250-0852, Japan.
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14
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Kinjo J, Hirakawa T, Tsuchihashi R, Nagao T, Okawa M, Nohara T, Okabe H. Hepatoprotective constituents in plants. 14. Effects of soyasapogenol B, sophoradiol, and their glucuronides on the cytotoxicity of tert-butyl hydroperoxide to HepG2 cells. Biol Pharm Bull 2003; 26:1357-60. [PMID: 12951488 DOI: 10.1248/bpb.26.1357] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of soyasapogenol B, sophoradiol, their glucuronides, and glycyrrhizin on the hepatotoxicity of tert-butyl hydroperoxide (t-BuOOH) in a human-liver-derived cell line (HepG2 cells) were investigated. Glycyrrhizin showed significant dose-dependent protective effects against the cytotoxicity of t-BuOOH. Among soyasapogenol B and its glucuronides, the monoglucuronide showed the most potent hepatoprotective activity, followed by soyasapogenol B itself. Soyasaponin III was weakly protective, while soyasaponin I increased the toxicity of t-BuOOH. Among sophoradiol and its glucuronides, sophoradiol itself showed the most potent hepatoprotective activity, which was equal to glycyrrhizin, while the monoglucuronide and kaikasaponin III showed an increase in cytotoxicity. These results were considerably different from those reported previously on the protective effects of these compounds using primary cultures of immunologically injured rat liver cells. Consequently, the hepatoprotective action of the triterpene derivatives investigated would be different in HepG2 cells and in rat primary hepatocyte cultures.
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Affiliation(s)
- Junei Kinjo
- Faculty of Pharmaceutical Sciences, Fukuoka University, Japan.
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Plé K. Synthesis of the trisaccharide portion of soyasaponin beta g: evaluation of a new glucuronic acid acceptor. Carbohydr Res 2003; 338:1441-54. [PMID: 12829390 DOI: 10.1016/s0008-6215(03)00195-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of the trisaccharide portion of soyasaponin beta g was successfully achieved using a new glucuronic acid acceptor: methyl 1-O-allyl-3,4-di-O-methoxymethyl-beta-D-glucuronate (9). This compound and methyl 1-O-allyl-3,4-di-O-tert-butyldimethylsilyl-beta-D-glucuronate (8) were both prepared from glucuronolactone via a glycal intermediate. The former compound 9 was successfully coupled to ethyl 2-O-benzoyl-3,4,6-tri-O-benzyl-1-thio-beta-D-galactopyranoside (13) in excellent yield. Synthesis of the protected trisaccharide was then completed by the addition of a suitably protected rhamnose derivative to the disaccharide portion. The reactivity of the glucuronic acid derivative 9 was also explored with trichloroacetimidate and fluoride donors.
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Affiliation(s)
- Karen Plé
- Laboratoire de Pharmacognosie, Université de Reims Champagne-Ardenne, CNRS UMR 6013, CPCBAI, Bât. 18, Moulin de la Housse, BP 1039, F-51687 Reims, France.
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Rao AV, Gurfinkel DM. The bioactivity of saponins: triterpenoid and steroidal glycosides. DRUG METABOLISM AND DRUG INTERACTIONS 2001; 17:211-35. [PMID: 11201296 DOI: 10.1515/dmdi.2000.17.1-4.211] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Triterpenoid and steroidal glycosides, referred to collectively as saponins, are bioactive compounds present naturally in many plants. They have considerable potential as pharmaceutical and/or nutraceutical agents in natural or synthetic form. Saponins, from a variety of sources, have been shown to have hypocholesterolemic, anti-coagulant, anticarcinogenic, hepatoprotective, hypoglycemic, immunomodulatory, neuroprotective, anti-inflammatory and anti-oxidant activity. This paper reviews saponin research of the last decade, focussing on developments in understanding their mechanism of action and structure-activity relationships. Virtually all of this work has used animal and in vitro models. To date there are very few human data.
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Affiliation(s)
- A V Rao
- Department of Nutritional Sciences, University of Toronto, ON, Canada.
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Nohara T, Ikeda T, Kinjo J, Kajimoto T. Synthesis of Neosaponins Carrying Oligosaccharides from Natural Products. HETEROCYCLES 2000. [DOI: 10.3987/com-99-8612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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