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Wang Y, Yu D, Zhu S, Du X, Wang X. The genus Dioscorea L. (Dioscoreaceae), a review of traditional uses, phytochemistry, pharmacology, and toxicity. JOURNAL OF ETHNOPHARMACOLOGY 2024; 329:118069. [PMID: 38552992 DOI: 10.1016/j.jep.2024.118069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/29/2024] [Accepted: 03/16/2024] [Indexed: 04/11/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The genus Dioscorea, a member of the Dioscoreaceae family, comprises approximately 600 species and is widely distributed across temperate and tropical regions such as Asia, South Africa, and North America. The traditional medicinal uses of Dioscorea have been documented in Asian and African pharmacological systems. In Asia, this genus is traditionally used to treat respiratory illnesses, rheumatism, diabetes, diarrhea, dysentery, and other conditions. In Africa, this genus has been used to treat human immunodeficiency virus and ring worms. However, the traditional medicinal practices in North America rarely mention the use of this genus. AIM OF THE STUDY The aim of this review is to comprehensively review the genus Dioscorea, focusing on its traditional uses, phytochemical constituents, pharmacological activities, and potential toxicities. The research also aims to highlight the valuable bioactive compounds within Dioscorea and emphasize the need for further investigations into acute and chronic toxicity, activity mechanisms, molecular markers, and other relevant factors to contribute to the discovery of novel pharmaceuticals. MATERIALS AND METHODS A search for available information on Dioscorea was conducted using scientific databases, including PubMed, ISI-WOS, Scopus, and Google Scholar, as well as recent academic publications from reputable publishers and other literature sources. The search was not limited by language and spanned the literature published between 1950 and 2022. RESULTS This article provides a comprehensive review of the Dioscorea genus, focusing on its traditional uses, phytochemical constituents, pharmacological activities, and potential toxicities. Extensive research has been conducted on this genus, resulting in the isolation and examination of over 1000 compounds, including steroids, terpenoids, and flavonoids, to determine their biological activities. These activities include anti-tumor, anti-inflammatory, immunomodulatory, neuroprotective, hypoglycemic, and hypolipidemic effects. However, some studies have indicated the potential toxicity of high doses of Dioscorea, highlighting the need for further investigations to assess the safety of this genus. Additionally, this review explores potential avenues for future research and discusses the challenges associated with a comprehensive understanding of the Dioscorea genus. CONCLUSIONS Based on the existing literature, it can be concluded that Dioscorea is a valuable source of bioactive compounds that have the potential to treat various disorders. Future research should prioritize the investigation of acute and chronic toxicity, activity mechanisms, molecular markers, and other relevant factors. This review provides a comprehensive analysis of the Dioscorea genus, emphasizing its potential to enable a deeper exploration of the biological activity mechanisms of these plants and contribute to the discovery of novel pharmaceuticals.
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Affiliation(s)
- Yufei Wang
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, 150040, China
| | - Dan Yu
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, 150040, China
| | - Shaojie Zhu
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, 150040, China
| | - Xiaowei Du
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, 150040, China.
| | - Xijun Wang
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, 150040, China.
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Nie W, Zhang HY, Ma YX, Wan JF, Feng LP, Cui T, Li Q. New steroidal saponins from the aerial parts of Paris polyphylla var. yunnanensis and their effects on blood coagulation. Fitoterapia 2024; 174:105833. [PMID: 38301935 DOI: 10.1016/j.fitote.2024.105833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/19/2024] [Accepted: 01/24/2024] [Indexed: 02/03/2024]
Abstract
Five new steroidal saponins, paripolins D-H (1-5), and 6 known compounds (6-11) were isolated from the aerial parts of Paris polyphylla var. yunnanensis. The structures of 1-5 were determined using spectroscopic analyses in conjunction with acid hydrolysis. It is for the first time to report the 12-hydroxysteroidal saponins from the genus Paris. The effect of all isolated compounds on blood coagulation was determined in vitro using the plasma recalcification time method. Compounds 1 and 2 showed potent procoagulant activity, and 5-11 exhibited significant anticoagulant activity.
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Affiliation(s)
- Wei Nie
- Yunnan Institute of Materia Medica, Kunming 650111, PR China; Yunnan Province Company Key Laboratory for TCM and Ethnic Drug of New Drug Creation, Kunming 650111, PR China
| | - Hong-Yan Zhang
- Yunnan Yunke Characteristic Plant Extraction Laboratory Co., Ltd., Yunnan 650106, PR China
| | - Yan-Xia Ma
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, PR China
| | - Jin-Fu Wan
- Yunnan Institute of Materia Medica, Kunming 650111, PR China; Yunnan Province Company Key Laboratory for TCM and Ethnic Drug of New Drug Creation, Kunming 650111, PR China
| | - Li-Ping Feng
- Yunnan Institute of Materia Medica, Kunming 650111, PR China; Yunnan Province Company Key Laboratory for TCM and Ethnic Drug of New Drug Creation, Kunming 650111, PR China
| | - Tao Cui
- Yunnan Institute of Materia Medica, Kunming 650111, PR China; Yunnan Province Company Key Laboratory for TCM and Ethnic Drug of New Drug Creation, Kunming 650111, PR China
| | - Qian Li
- Yunnan Institute of Materia Medica, Kunming 650111, PR China; Yunnan Province Company Key Laboratory for TCM and Ethnic Drug of New Drug Creation, Kunming 650111, PR China.
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Kang Y, Park C, Lee H, Kang S, Cheon C, Kim B. Natural Products as New Approaches for Treating Bladder Cancer: From Traditional Medicine to Novel Drug Discovery. Pharmaceutics 2023; 15:pharmaceutics15041117. [PMID: 37111603 PMCID: PMC10145408 DOI: 10.3390/pharmaceutics15041117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/19/2023] [Accepted: 03/22/2023] [Indexed: 04/03/2023] Open
Abstract
Bladder cancer (BC) is a heterogeneous disease that a tumor develops in the bladder lining and in some cases, the bladder muscle. Chemotherapy and immunotherapy are commonly used to treat bladder cancer. However, chemotherapy can cause burning and irritation in the bladder while BCG immunotherapy, which is the main type of intravesical immunotherapy for bladder cancer, can also cause burning in the bladder and flu-like symptoms. Thus, drugs originating from natural products have attracted much attention due to the reports that they have anti-cancer properties with low adverse effects. In this study, eighty-seven papers that dealt with natural products preventing or treating bladder cancer were reviewed. The studies were classified into the following mechanism: 71 papers on cell death, 5 papers on anti-metastasis, 3 papers on anti-angiogenesis, 1 paper on anti-resistance, and 7 papers on clinical trials. Most of the natural products that induced apoptosis up-regulated proteins such as caspase-3 and caspase-9. Regarding anti-metastasis, MMP-2 and MMP-9 are regulated frequently. Regarding anti-angiogenesis, HIF-1α and VEGF-A are down-regulated frequently. Nevertheless, the number of papers regarding anti-resistance and clinical trial are too few, so more studies are needed. In conclusion, this database will be useful for future in vivo studies of the anti-bladder cancer effect of natural products, in the process of selecting materials used for the experiment.
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Ki YS, Chung KS, Lee HW, Choi JH, Tapondjou LA, Jang E, Lee KT. Pennogenin-3-O-α-L-Rhamnopyranosyl-(1→2)-[α-L-Rhamnopyranosyl-(1→3)]-β-D-Glucopyranoside (Spiroconazol A) Isolated from Dioscorea bulbifera L. var. sativa Induces Autophagic Cell Death by p38 MAPK Activation in NSCLC Cells. Pharmaceuticals (Basel) 2022; 15:ph15070893. [PMID: 35890190 PMCID: PMC9319756 DOI: 10.3390/ph15070893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 02/01/2023] Open
Abstract
In our previous study, we reported the isolation of pennogenin-3-O-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→3)]-β-D-glucopyranoside (spiroconazol A), a steroidal saponin, from the flowers of Dioscorea bulbifera L. var. sativa. In the present study, we aimed to investigate the effects of spiroconazol A on autophagy and its underlying mechanisms in A549 and NCI-H358 human non-small cell lung cancer (NSCLC) cells. Spiroconazol A inhibited the proliferation of NSCLC cells in a concentration- and time-dependent manner. To determine the type of programmed cell death induced by spiroconazol A, we performed a characterization of apoptosis in spiroconazol A-treated A549 cells. Our results showed that spiroconazol A significantly suppressed A549 cell viability but did not influence cell apoptosis because phosphatidylserine and caspase activation were not detected. Furthermore, spiroconazol A treatment upregulated the expression of LC3-II and autophagy-related Beclin-1 protein, suggesting that spiroconazol A induces autophagy in A549 cells. Moreover, spiroconazol A activated the phosphorylation of p38 mitogen-activated protein kinase (MAPK) but did not affect the phosphorylation of Janus kinase or ERK1/2. Notably, SB203580, a p38 MAPK inhibitor, had a significant inhibitory effect on spiroconazol A-induced autophagic cell death in A549 cells. Our results indicated that spiroconazol A-induced autophagy is dependent on p38 MAPK signaling and has potential as a therapeutic target in NSCLC.
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Affiliation(s)
- Yo Sook Ki
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Seoul 02447, Korea; (Y.S.K.); (K.-S.C.); (H.-W.L.)
| | - Kyung-Sook Chung
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Seoul 02447, Korea; (Y.S.K.); (K.-S.C.); (H.-W.L.)
| | - Heon-Woo Lee
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Seoul 02447, Korea; (Y.S.K.); (K.-S.C.); (H.-W.L.)
| | - Jung-Hye Choi
- Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Seoul 02447, Korea;
| | - Léon Azefack Tapondjou
- Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 183, Cameroon;
| | - Eungyeong Jang
- Department of Internal Medicine, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Seoul 02447, Korea;
- Department of Internal Medicine, Kyung Hee University Korean Medicine Hospital, 23, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea
| | - Kyung-Tae Lee
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Seoul 02447, Korea; (Y.S.K.); (K.-S.C.); (H.-W.L.)
- Correspondence: ; Tel.: +82-2-961-0860
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Bhat MH, Fayaz M, Kumar A, Dar AA, Jain AK. Development of an efficient micropropagation system for Dioscorea bulbifera L. and phytochemical profile of regenerated plants. J Genet Eng Biotechnol 2022; 20:107. [PMID: 35838925 PMCID: PMC9287521 DOI: 10.1186/s43141-022-00382-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 06/14/2022] [Indexed: 12/04/2022]
Abstract
Background The present study was designed to develop an improved in vitro regeneration system for Dioscorea bulbifera using mature nodal explants. Direct organogenesis from nodal segments was achieved by culturing the nodal explants on Murashige and Skoog medium supplemented with 3.5 mgl−1 6-benzylaminopurine (BAP). Shoot multiplication was widely affected by the kind and concentration of plant growth regulators, and the sub-culturing of in vitro regenerated shootlets on fresh medium. After incubation for 4 weeks at optimum BAP concentration, cultures were transferred to secondary medium with BAP (optimized concentration) supplemented with different auxins. Results On medium with 3.5 mgl−1 6-benzylaminopurine, maximum regeneration (87 ± 1.85%) with an average shoot number of 2.0 ± 0.08, and length of 3.5 ± 0.04 cm were observed after 4 weeks of incubation. Maximum number of shoots (3.9 ± 0.21) was observed with 3.5 mgl−1 BAP in combination with 0.75 mgl−1 indole-3-acetic acid. The best root formation was observed on ½ MS medium supplemented with 0.75 mgl−1 α-naphthalene acetic acid, with 4.7 ± 0.03 roots per shoot. The well-rooted plantlets were successfully acclimatized in with 100% survival rate. The plantlets grew well with normal growth, flowering and showed, by High performance thin layer chromatography, almost same number of phytoconstituents compared with the mother plant. Conclusions This is the first study on comparative phytochemical analysis of wild growing and in vitro regenerated plants of D. bulbifera which validates the medicinal and nutritional properties of in vitro raised plants.
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Affiliation(s)
| | - Mufida Fayaz
- School of Studies in Botany, Jiwaji University, Gwalior, 474011, India
| | - Amit Kumar
- Institute of Ethnobiology, Jiwaji University, Gwalior, 474011, India
| | - Alamgir A Dar
- Research Centre for Residue and Quality Analysis, Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST-K), J, Srinagar, &K 180009, India
| | - Ashok Kumar Jain
- Institute of Ethnobiology, Jiwaji University, Gwalior, 474011, India
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Li Y, Tan C, Li Z, Guo J, Li S, Chen X, Wang C, Dai X, Yang H, Song W, Hou L, Xu J, Tong Z, Xu A, Yuan X, Wang W, Yang Q, Chen L, Sun Z, Wang K, Pan B, Chen J, Bao Y, Liu F, Qi X, Gang DR, Wen J, Li J. The genome of Dioscorea zingiberensis sheds light on the biosynthesis, origin and evolution of the medicinally important diosgenin saponins. HORTICULTURE RESEARCH 2022; 9:uhac165. [PMID: 36204203 PMCID: PMC9531337 DOI: 10.1093/hr/uhac165] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 07/18/2022] [Indexed: 05/05/2023]
Abstract
Diosgenin saponins isolated from Dioscorea species such as D. zingiberensis exhibit a broad spectrum of pharmacological activities. Diosgenin, the aglycone of diosgenin saponins, is an important starting material for the production of steroidal drugs. However, how plants produce diosgenin saponins and the origin and evolution of the diosgenin saponin biosynthetic pathway remain a mystery. Here we report a high-quality, 629-Mb genome of D. zingiberensis anchored on 10 chromosomes with 30 322 protein-coding genes. We reveal that diosgenin is synthesized in leaves ('source'), then converted into diosgenin saponins, and finally transported to rhizomes ('sink') for storage in plants. By evaluating the distribution and evolutionary patterns of diosgenin saponins in Dioscorea species, we find that diosgenin saponin-containing may be an ancestral trait in Dioscorea and is selectively retained. The results of comparative genomic analysis indicate that tandem duplication coupled with a whole-genome duplication event provided key evolutionary resources for the diosgenin saponin biosynthetic pathway in the D. zingiberensis genome. Furthermore, comparative transcriptome and metabolite analysis among 13 Dioscorea species suggests that specific gene expression patterns of pathway genes promote the differential evolution of the diosgenin saponin biosynthetic pathway in Dioscorea species. Our study provides important insights and valuable resources for further understanding the biosynthesis, evolution, and utilization of plant specialized metabolites such as diosgenin saponins.
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Affiliation(s)
- Yi Li
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Chao Tan
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Zihao Li
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Jingzhe Guo
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Song Li
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xin Chen
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Chen Wang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xiaokang Dai
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Huan Yang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Wei Song
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Lixiu Hou
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Jiali Xu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Ziyu Tong
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Anran Xu
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xincheng Yuan
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Weipeng Wang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Qingyong Yang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lingling Chen
- College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Zongyi Sun
- Grandomics Biosciences, Beijing 102200, China
| | - Kai Wang
- Grandomics Biosciences, Beijing 102200, China
| | - Bo Pan
- Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, 666303, China
| | - Jianghua Chen
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Kunming, 650223, China
| | - Yinghua Bao
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, 512005, China
| | - Faguang Liu
- Henry Fok College of Biology and Agriculture, Shaoguan University, Shaoguan, 512005, China
| | - Xiaoquan Qi
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - David R Gang
- Institute of Biological Chemistry, Washington State University, Pullman, WA, 99164, USA
| | - Jun Wen
- Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20013-7012, USA
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Ngan NTT, Hoang NH, Truong VV, Hien NT, Lan NN, Tung NV, Huong PTM, Oh H, Quang TH. Anti-inflammatory norclerodane diterpenoids and tetrahydrophenanthrene from the leaves and stems of Dioscorea bulbifera. Fitoterapia 2021; 153:104965. [PMID: 34129921 DOI: 10.1016/j.fitote.2021.104965] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/06/2021] [Accepted: 06/10/2021] [Indexed: 10/21/2022]
Abstract
Chemical investigation of the leaves and stems of Dioscorea bulbifera resulted in isolation of 10 compounds, including three new norclerodane diterpenoids, diosbulbiferins A (1) and B (2) and diosbulbiferinoside A (3), and one new natural congener, diosbulbiferin C (4), along with one new tetrahydrophenanthrene, diosbulbinone (8). Their structures were elucidated by comprehensive analyses of spectroscopic methods, including NMR and mass spectra. The absolute configurations of compounds 1-3 and 8 were deduced by time-dependent density functional theory (TD-DFT) electronic circular dichroism (ECD) spectroscopic analyses. In addition, cytotoxic effects against MCF-7, HepG2, and SK-Mel-2 cancer cells and in vitro anti-inflammatory effects of the isolated compounds in LPS-stimulated BV2 microglial cells were also reported.
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Affiliation(s)
- Nguyen Thi Thanh Ngan
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam.
| | - Nguyen Huy Hoang
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam
| | - Vu Van Truong
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam
| | - Nguyen Thu Hien
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam
| | - Nguyen Ngoc Lan
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam
| | - Nguyen Van Tung
- Institute of Genome Research, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam
| | - Pham Thi Mai Huong
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam
| | - Hyuncheol Oh
- College of Pharmacy, Wonkwang University, Iksan 570-749, Republic of Korea
| | - Tran Hong Quang
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi 10072, Viet Nam.
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Fouedjou RT, Ponou BK, Teponno RB, Melzig M, Tanaka C, Miyamoto T, Tapondjou LA. Two new triterpenoid saponins: telephiifoliosides A and B from the roots of Corrigiola litoralis subsp. telephiifolia (Pourr.) Briq. Nat Prod Res 2021; 36:4949-4956. [PMID: 33939575 DOI: 10.1080/14786419.2021.1914030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The polar fraction of the MeOH extract of the roots of Corrigiola litoralis subsp. telephiifolia (Pourr.) Briq. (Caryophyllaceae) was investigated for its constituents and two previously unreported monodesmosides triterpene saponins, telephiifoliosides A and B (1 and 2), along with the known bonushenricoside A (3) were isolated. Their structures were elucidated by combined spectroscopic and spectrometric techniques (1H NMR, 13C NMR, HSQC, 1H-1H COSY, HMBC, TOCSY, NOESY, HRESIMS) and chemical methods. The structures of the new saponins were established as; 3-O-α-L-arabinopyranosyljaligonic acid (1), and 3-O-α-L-arabinopyranosylphytolaccagenin ester (2). Upon evaluation of the antiproliferative activity on human malignant epithelial (HeLa) cells, none of the isolated compounds was efficient at the concentration of 33 µM. HighlightsThis is the first phytochemical study on Corrigiola litoralis subsp. telephiifolia.Two new saponins were isolated from the roots of Corrigiola litoralis subsp. telephiifolia.The isolated compounds were tested for their antiproliferative activity.
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Affiliation(s)
- Romuald Tématio Fouedjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.,Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.,Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Rémy Bertrand Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Matthias Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | - Chiaki Tanaka
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomofumi Miyamoto
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
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Obidiegwu JE, Lyons JB, Chilaka CA. The Dioscorea Genus (Yam)-An Appraisal of Nutritional and Therapeutic Potentials. Foods 2020; 9:E1304. [PMID: 32947880 PMCID: PMC7555206 DOI: 10.3390/foods9091304] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/11/2020] [Accepted: 09/12/2020] [Indexed: 12/19/2022] Open
Abstract
The quest for a food secure and safe world has led to continuous effort toward improvements of global food and health systems. While the developed countries seem to have these systems stabilized, some parts of the world still face enormous challenges. Yam (Dioscorea species) is an orphan crop, widely distributed globally; and has contributed enormously to food security especially in sub-Saharan Africa because of its role in providing nutritional benefits and income. Additionally, yam has non-nutritional components called bioactive compounds, which offer numerous health benefits ranging from prevention to treatment of degenerative diseases. Pharmaceutical application of diosgenin and dioscorin, among other compounds isolated from yam, has shown more prospects recently. Despite the benefits embedded in yam, reports on the nutritional and therapeutic potentials of yam have been fragmented and the diversity within the genus has led to much confusion. An overview of the nutritional and health importance of yam will harness the crop to meet its potential towards combating hunger and malnutrition, while improving global health. This review makes a conscious attempt to provide an overview regarding the nutritional, bioactive compositions and therapeutic potentials of yam diversity. Insights on how to increase its utilization for a greater impact are elucidated.
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Affiliation(s)
- Jude E. Obidiegwu
- National Root Crops Research Institute, Umudike, Km 8 Umuahia-Ikot Ekpene Road, P.M.B 7006 Umuahia, Abia State, Nigeria
| | - Jessica B. Lyons
- Department of Molecular and Cell Biology and Innovative Genomics Institute, University of California, Berkeley, 142 Weill Hall #3200, Berkeley, CA 94720-3200, USA;
| | - Cynthia A. Chilaka
- Institute of Pharmacology and Toxicology, Julius Maximilian University of Würzburg, Versbacher Straβe 9, 97078 Würzburg, Germany; or
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Ye ZG, Hou HP, Zhang GP, Li H, Chen TF, Gao YH, Song L, Zhang ZX. Mitochondria are main targets of time/dose-dependent oxidative damage-based hepatotoxicity caused by rhizoma dioscoreae bulbiferae in mice. WORLD JOURNAL OF TRADITIONAL CHINESE MEDICINE 2020. [DOI: 10.4103/wjtcm.wjtcm_72_20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Ikiriza H, Ogwang PE, Peter EL, Hedmon O, Tolo CU, Abubaker M, Abdalla AAM. Dioscorea bulbifera, a highly threatened African medicinal plant, a review. ACTA ACUST UNITED AC 2019. [DOI: 10.1080/23312025.2019.1631561] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Hilda Ikiriza
- Pharm Biotechnology and Traditional Medicine Centre of Excellence (ACE II), Mbarara University of Science & Technology, P.O Box 1410, Mbarara, Uganda
| | - Patrick Engeu Ogwang
- Pharm Biotechnology and Traditional Medicine Centre of Excellence (ACE II), Mbarara University of Science & Technology, P.O Box 1410, Mbarara, Uganda
- Department of Pharmacy, Faculty of Science, Mbarara University of Science and Technology, P.o.Box 1410, Mbarara, Uganda
| | - Emanuel L. Peter
- Pharm Biotechnology and Traditional Medicine Centre of Excellence (ACE II), Mbarara University of Science & Technology, P.O Box 1410, Mbarara, Uganda
| | - Okella Hedmon
- Pharm Biotechnology and Traditional Medicine Centre of Excellence (ACE II), Mbarara University of Science & Technology, P.O Box 1410, Mbarara, Uganda
| | - Casim Umba Tolo
- Pharm Biotechnology and Traditional Medicine Centre of Excellence (ACE II), Mbarara University of Science & Technology, P.O Box 1410, Mbarara, Uganda
- Department of Biology, Faculty of Science, Mbarara University of Science and Technology, P.o.Box 1410, Mbarara, Uganda
| | - Muwonge Abubaker
- National Agricultural Research Organization (NARO), National Crops Resources Research Institute (NaCRRI), P.O. Box 7084, Kampala, Uganda
| | - Ali Abdalla Mai Abdalla
- Department of Biochemistry and Molecular Biology, Faculty of Science, Gezira University, P.o.Box 20, Wad Medani, Sudan
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12
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Upadhyay S, Jeena GS, Shukla RK. Recent advances in steroidal saponins biosynthesis and in vitro production. PLANTA 2018; 248:519-544. [PMID: 29748819 DOI: 10.1007/s00425-018-2911-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Steroidal saponins exhibited numerous pharmacological activities due to the modification of their backbone by different cytochrome P450s (P450) and UDP glycosyltransferases (UGTs). Plant-derived steroidal saponins are not sufficient for utilizing them for commercial purpose so in vitro production of saponin by tissue culture, root culture, embryo culture, etc, is necessary for its large-scale production. Saponin glycosides are the important class of plant secondary metabolites, which consists of either steroidal or terpenoidal backbone. Due to the existence of a wide range of medicinal properties, saponin glycosides are pharmacologically very important. This review is focused on important medicinal properties of steroidal saponin, its occurrence, and biosynthesis. In addition to this, some recently identified plants containing steroidal saponins in different parts were summarized. The high throughput transcriptome sequencing approach elaborates our understanding related to the secondary metabolic pathway and its regulation even in the absence of adequate genomic information of non-model plants. The aim of this review is to encapsulate the information related to applications of steroidal saponin and its biosynthetic enzymes specially P450s and UGTs that are involved at later stage modifications of saponin backbone. Lastly, we discussed the in vitro production of steroidal saponin as the plant-based production of saponin is time-consuming and yield a limited amount of saponins. A large amount of plant material has been used to increase the production of steroidal saponin by employing in vitro culture technique, which has received a lot of attention in past two decades and provides a way to conserve medicinal plants as well as to escape them for being endangered.
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Affiliation(s)
- Swati Upadhyay
- Biotechnology Division (CSIR-CIMAP), Central Institute of Medicinal and Aromatic Plants, (CSIR-CIMAP) P.O. CIMAP (a laboratory under Council of Scientific and Industrial Research, India), Near Kukrail Picnic Spot, Lucknow, 226015, India
| | - Gajendra Singh Jeena
- Biotechnology Division (CSIR-CIMAP), Central Institute of Medicinal and Aromatic Plants, (CSIR-CIMAP) P.O. CIMAP (a laboratory under Council of Scientific and Industrial Research, India), Near Kukrail Picnic Spot, Lucknow, 226015, India
| | - Rakesh Kumar Shukla
- Biotechnology Division (CSIR-CIMAP), Central Institute of Medicinal and Aromatic Plants, (CSIR-CIMAP) P.O. CIMAP (a laboratory under Council of Scientific and Industrial Research, India), Near Kukrail Picnic Spot, Lucknow, 226015, India.
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Tapondjou LA, Jenett-Siems K, Siems K, Weng A, Melzig MF. Flavonol Glycosides and Cytotoxic Steroidal Saponins from Furcraea Tuberosa (Agavaceae). Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Phytochemical analysis of the mature fruits of Furcraea tuberosa (Agavaceae) resulted in the isolation of a new bisdesmosidic spirostanol saponin (1), along with eight known steroidal glycosides (2–9), one known phenolic carboxylic acid ester (10) and three known flavonol glycosides (11–13). The structures of these compounds were assigned using a combination of 1D and 2D NMR techniques including 1H, 13C, COSY, TOCSY, HSQC and HMBC NMR, and confirmed by mass spectrometry. Thus the new saponin was elucidated as (25 R)–6α-(β-D-glucopyranosyloxy)-5α-spirostane-3β- O-[(6- O-hexadecanoyl)-β-D-glucopyranoside]. The literature survey revealed that most of the steroidal saponins isolated have shown potent cytotoxic effects against various human cancer cell lines and the results are herein reviewed.
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Affiliation(s)
- Leon A. Tapondjou
- Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, D-14473 Potsdam, Germany
| | - Alexander Weng
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Matthias F. Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
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Chaniad P, Wattanapiromsakul C, Pianwanit S, Tewtrakul S. Anti-HIV-1 integrase compounds from Dioscorea bulbifera and molecular docking study. PHARMACEUTICAL BIOLOGY 2016; 54:1077-85. [PMID: 26864337 PMCID: PMC11133776 DOI: 10.3109/13880209.2015.1103272] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 07/14/2015] [Accepted: 09/29/2015] [Indexed: 06/05/2023]
Abstract
CONTEXT Dioscorea bulbifera L. (Dioscoreaceae) has been used in a traditional Thai longevity medicine preparation. Isolation of inhibitors from natural products is a potential source for continuous development of new HIV-1 integrase (IN) inhibitors. OBJECTIVE The objective of this study is to isolate the compounds and evaluate their anti-HIV-1 IN activity, as well as to predict the potential interactions of the compounds with an IN. MATERIALS AND METHODS The ethyl acetate and water fractions (1-100 μg/mL) of Dioscorea bulbifera bulbils were isolated and tested for their anti-HIV-1 IN activity using the multiplate integration assay (MIA). The interactions of the active compounds with IN were investigated using a molecular docking method. RESULTS AND DISCUSSIONS The ethyl acetate and water fractions of Dioscorea bulbifera bulbils afforded seven compounds. Among these, allantoin (1), 2,4,3',5'-tetrahydroxybibenzyl (2), and 5,7,4'-trihydroxy-2-styrylchromone (5) were isolated for the first time from this plant. Myricetin (4) exhibited the most potent activity with an IC50 value of 3.15 μM, followed by 2,4,6,7-tetrahydroxy-9,10-dihydrophenanthrene (3, IC50 value= 14.20 μM), quercetin-3-O-β-D-glucopyranoside (6, IC50 value = 19.39 μM) and quercetin-3-O-β-D-galactopyranoside (7, IC50 value = 21.80 μM). Potential interactions of the active compounds (3, 4, 6, and 7) with the IN active site were additionally investigated. Compound 4 showed the best binding affinity to IN and formed strong interactions with various amino acid residues. These compounds interacted with Asp64, Thr66, His67, Glu92, Asp116, Gln148, Glu152, Asn155, and Lys159, which are involved in both the 3'-processing and strand transfer reactions of IN. In particular, galloyl, catechol, and sugar moieties were successful inhibitors for HIV-1 IN.
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Affiliation(s)
- Prapaporn Chaniad
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkhla, Thailand
| | - Chatchai Wattanapiromsakul
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkhla, Thailand
- Excellent Research Laboratory, Phytomedicine and Pharmaceutical Biotechnology Excellent Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkhla, Thailand
| | - Somsak Pianwanit
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Pathumwan, Thailand
| | - Supinya Tewtrakul
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkhla, Thailand
- Excellent Research Laboratory, Phytomedicine and Pharmaceutical Biotechnology Excellent Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkhla, Thailand
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Liu ZH, Yan H, Si YA, Ni W, Chen Y, He L, Liu HY. Bioactive spirostane glycosides from Tacca plantaginea. Steroids 2016; 106:86-92. [PMID: 26718088 DOI: 10.1016/j.steroids.2015.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 12/08/2015] [Accepted: 12/18/2015] [Indexed: 10/22/2022]
Abstract
Eight new spirostane glycosides, taccaosides E-L (2-7, 11, and 14), along with 7 known spirostane glycosides were isolated from the extract of the whole plants of Tacca plantaginea (Hance) Drenth. Their structures were established on the basis of physical data, spectroscopic analysis (MS, 1D and 2D NMR), and chemical methods. The cytotoxicities of the isolates were evaluated in vitro against two human cancer cell lines (HEK293 and HepG2). The results showed that compound 1 had the strongest cytotoxic activity with IC50 values of 1.7 μM and 1.2 μM against the two cancer cell lines, respectively. Furthermore, the spirostane glycosides with 17α-hydroxyl group at their aglycones (10, 12, and 15) were tested for the induced platelet aggregation activity.
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Affiliation(s)
- Zhen-Hua Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huan Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yong-Ai Si
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Ni
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yu Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li He
- Department of Dermatology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
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Teponno RB, Tanaka C, Jie B, Tapondjou LA, Miyamoto T. Trifasciatosides A–J, Steroidal Saponins from Sansevieria trifasciata. Chem Pharm Bull (Tokyo) 2016; 64:1347-55. [DOI: 10.1248/cpb.c16-00337] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Rémy Bertrand Teponno
- Department of Chemistry, Faculty of Science, University of Dschang
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University
| | - Chiaki Tanaka
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University
| | - Bai Jie
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University
| | | | - Tomofumi Miyamoto
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University
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17
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Nono RN, Nguelefack-Mbuyo EP, Nzowa LK, Ponou BK, Teponno RB, Nguelefack TB, Barboni L, Tapondjou LA, Park HJ. Antioxidant C-glycosylflavones of Drymaria cordata (Linn.) Willd. Arch Pharm Res 2015; 39:43-50. [PMID: 26642770 DOI: 10.1007/s12272-015-0691-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 11/20/2015] [Indexed: 11/25/2022]
Abstract
A new C-glycosylflavone, drymaritin E (6-C-(3-keto-β-digitoxopyranosyl)-4'-O-(β-D-glucopyranosyl)-7-methoxyl-5,4'-dihydroxylflavone) 1 was isolated from the oily upper phase (SU) of the MeOH extract from aerial parts of Drymaria cordata together with two known compounds (cassiaoccidentalin A 2 and anemonin 3) and an inseparable mixture of two known C-glycosylflavones 5,4'-dihydroxy-7-methoxyflavone-6-C-(2''-O-α-L-rhamnopyranosyl)-β-D-glucopyranoside 4a and 5,7,3',4'-tetrahydroxyflavone-6-C-(2''-O-α-L-rhamnopyranosyl)-β-D-glucopyranoside 4b. The alkaline hydrolysis of 3 led to a new hemisynthetic derivative, sodium anemonate (sodium 2-((1'E) 2'-sodium-carboxylate-vinyl)-5-oxo-cyclohex-1-ene carboxylate) 3a. The chemical structures were determined by spectroscopic methods ((1)H NMR, (13)C NMR, (1)H-(1)H COSY, HMBC, HSQC, and NOESY) and mass spectrometry (ESI-MS). C-glycosylflavones had significant free radical-scavenging activities on the radical 2,2-diphenyl-1-picrylhydrazyl (DPPH). However, SU and compounds 3 and 3a exhibited no activity. In particular, compound 1 exhibited a concentration-dependent radical scavenging activity on DPPH with EC50 of 31.43 µg/mL.
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Affiliation(s)
- Raymond N Nono
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon
| | - Elvine P Nguelefack-Mbuyo
- Laboratory of Animal Physiology and Phytopharmacology, Department of Animal Biology, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Laurence K Nzowa
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon
| | - Beaudelaire K Ponou
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon
| | - Rémy B Teponno
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon
| | - Télesphore B Nguelefack
- Laboratory of Animal Physiology and Phytopharmacology, Department of Animal Biology, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Luciano Barboni
- School of Science and Technology, Chemistry Division, University of Camerino, Via S. Agostino 1, 62032, Camerino, Italy
| | - Léon A Tapondjou
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon.
| | - Hee-Juhn Park
- Department of Pharmaceutical Engineering, Sandji University, Wonju, 220-702, Republic of Korea.
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Tapondjou LA, Siems KJ, Böttger S, Melzig MF. Steroidal Saponins from the Mesocarp of the Fruits of Raphia farinifera (Arecaceae) and their Cytotoxic Activity. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501001134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Eight steroidal saponins (1–8), including one previously unreported derivative (1), have been isolated from the mesocarp of Raphia farinifera fruits by combined column chromatography and RP-HPLC methods. They were characterized by spectroscopic (1D and 2D NMR experiments) and spectrometric (ESIMS) methods, as well as by comparison of their spectral data with those of reported compounds in the literature. All the isolated compounds were tested for cytotoxicity against urinary bladder carcinoma cells (ECV-304). Our results revealed that, for a high cytotoxicity, a sugar chain of at least three sugar moieties attached to C-3 of the steroidal saponin is necessary.
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Affiliation(s)
- Léon A. Tapondjou
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Kristina J. Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Stefan Böttger
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Matthias F. Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
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