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Rao QR, Rao JB, Zhao M. The specialized sesquiterpenoids produced by the genus Elephantopus L.: Chemistry, biological activities and structure-activity relationship exploration. Phytochemistry 2024; 221:114041. [PMID: 38442848 DOI: 10.1016/j.phytochem.2024.114041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/07/2024]
Abstract
The genus Elephantopus L. is a valuable resource rich in sesquiterpenoids with structural diversity and various bioactivities, showing great potential for applications in medicinal field and biological industry. Up to now, over 129 sesquiterpenoids have been isolated and identified from this plant genus, including 114 germacrane-type, 7 guaianolide-type, 5 eudesmane-type, 1 elemanolide-type, and 2 bis-sesquiterpenoids. These sesquiterpenoids were reported to show a diverse range of pharmacological properties, including cytotoxic, anti-tumor, anti-inflammatory, antimicrobial, and antiprotozoal. Consequently, some of them were identified as active scaffolds in the design and development of drugs. Considering that there is currently no overview available that covers the sesquiterpenoids and their biological activities in the Elephantopus genus, this article aims to comprehensively review the chemical structures, biosynthetic pathways, pharmacological properties, and structure-activity relationship of sesquiterpenoids found in the Elephantopus genus, which will establish a theoretical framework that can guide further research and exploration of sesquiterpenoids from Elephantopus plants as promising therapeutic agents.
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Affiliation(s)
- Qian-Ru Rao
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, 610041, People's Republic of China; Laboratory of Molecular Translational Medicine, Center for Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Maternal & Child Nutrition Center, West China Second University Hospital, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Jian-Bo Rao
- Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Chinese Medicine, Nanchang, 330004, People's Republic of China
| | - Min Zhao
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu, 610041, People's Republic of China.
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Tseme Wandji N, Bitchagno GTM, Mawabo Kamga I, Tchamgoue J, Nkenfou CN, Lenta BN, Sewald N, Kouam SF. Polyoxygenated Stigmastane-Type Steroids from Vernonia kotschyana Sch. Bip. ex Walp. and Their Chemophenetic Significance. Molecules 2023; 28:5278. [PMID: 37446939 DOI: 10.3390/molecules28135278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/30/2023] [Accepted: 07/02/2023] [Indexed: 07/15/2023] Open
Abstract
Four polyoxygenated stigmastanes (1-4) alongside known analogues (7-8) and flavonoids (5-6) were isolated from a dichloromethane/methanol (1:1, v/v) extract of the whole plant of Vernonia kotschyana Sch. Bip. ex Walp. (Asteraceae). Their structures were determined by means of spectroscopic and spectrometric analysis. The relative stereochemistry of the new compounds was established and confirmed via biosynthesis evidence and cyclization of 1 under acidic conditions. A plausible biosynthetic pathway to the new compounds and the chemophenetic significance of the isolated constituents were also discussed. The crude extract, fractions, and compounds (1-3) were assessed for their antibacterial activity against five highly prevalent bacterial strains. The fractions and compounds showed low to moderate activity with minimal inhibitory concentrations (MICs) > 125 µg/mL.
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Affiliation(s)
- Nadine Tseme Wandji
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Gabin Thierry M Bitchagno
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
- Department of Chemistry, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Isabelle Mawabo Kamga
- Department of Biology, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
| | - Joseph Tchamgoue
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde P.O. Box 812, Cameroon
| | - Celine Nguefeu Nkenfou
- Department of Biology, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
- Molecular Biology Center, Yaounde P.O. Box 14495, Cameroon
| | - Bruno Ndjakou Lenta
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Simeon Fogue Kouam
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde P.O. Box 47, Cameroon
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Tafouo Tsakou A, Laure Ndontsa B, Carly Nono Nono E, Tseme Wandji N, Thierry Mbahbou Bitchagno G, Jules Kezetas Bankeu J, Azefack Tapondjou L, Sewald N, Ndjakou Lenta B. Elemane-Type Sesquiterpene, Acetonide Derived Polyacetylene and Other Constituents from the Whole Plant of Gymnanthemum theophrastifolium (Schweinf. ex Oliv. & Hiern) H.Rob. and Their Chemophenetic Significance. Chem Biodivers 2023; 20:e202200196. [PMID: 36879423 DOI: 10.1002/cbdv.202200196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 02/16/2023] [Indexed: 03/08/2023]
Abstract
The chemical investigation of the methanol extract of the whole plant of Gymnanthemum theophrastifolium (Schweinf. ex Oliv. & Hiern) H.Rob. (Asteraceae) led to the isolation of a new elemane-type sesquiterpene (1), a new acetonide derived polyacetylene (2) and a naturally occurring compound (3) from the plant kingdom along with sixteen known compounds (4-19). Their structures were elucidated by extensive NMR and MS analysis. This is the first report on the chemical constituents of G. theophrastifolium. Furthermore, compounds 12, 13, and 14 are reported for the first time from the family Asteraceae, while compound 9 is reported for the first time from the genus Gymnanthemum. Thus, the present results provide valuable insights to the chemophenetic knowledge of G. theophrastifolium, which is also discussed in this work.
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Affiliation(s)
- Armelle Tafouo Tsakou
- Department of Chemistry, Faculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
| | - Blanche Laure Ndontsa
- Department of Chemistry, Faculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
| | - Eric Carly Nono Nono
- Department of organic Chemistry, Faculty of science, University of Yaoundé, P. O. Box 812, Yaoundé, Cameroon
| | - Nadine Tseme Wandji
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, P. O. Box 47, Yaoundé, Cameroon
| | - Gabin Thierry Mbahbou Bitchagno
- Department of Chemistry, Faculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
- Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, D-33501, Bielefeld, Germany
| | - Jean Jules Kezetas Bankeu
- Department of Chemistry, Faculty of science, The University of Bamenda, P. O. Box 39, Bambili, Cameroon
| | - Leon Azefack Tapondjou
- Department of Chemistry, Faculty of Science, University of Dschang, P. O. Box 67, Dschang, Cameroon
| | - Norbert Sewald
- Department of organic Chemistry, Faculty of science, University of Yaoundé, P. O. Box 812, Yaoundé, Cameroon
| | - Bruno Ndjakou Lenta
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, P. O. Box 47, Yaoundé, Cameroon
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Seumo AS, Nanfack ARD, Ndontsa BL, Bitchagno GTM, Mbouangouere R, Lenta BN, Sewald N, Tane P, Tene M, Ngouela SA. Alkenylbenzoquinones and other compounds from the fruit of Maesa lanceolata exhibited potent cytotoxic, antibacterial, and antiradical scavenging activities §. Nat Prod Res 2021; 36:4379-4387. [PMID: 34694175 DOI: 10.1080/14786419.2021.1994565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A phytochemical study of the methanol extract of the fruit of Maesa lanceolata resulted in the isolation of a new alkenylbenzoquinone (1), alongside the known compounds (Z)-2,5-dihydroxy-6-methyl-3-(pentadec-10'-enyl)-1,4-benzoquinone (2), 2,5-dihydroxy-6-methyl-3-(nonadec-14'-enyl)-1,4-benzoquinone (3), 2,5-dihydroxy-6-methyl-3-(tridecyl)-1,4-benzoquinone (4), (2S,3S,4R,2'R,9E)-[2'-hydroxytetraeicosanoyl]-2-aminooctadec-9-ene-1,3,4-triol (5), monopalmitin (glyceryl palmitate) (6), lupeol (7), and 3-O-(β-D-glucopyranoside)-β-sitosterol (8). The structures of the compounds were established by the means of spectroscopic (1 D- and 2 D-NMR) and spectrometric techniques (MS). The isolated compounds were assessed for their antibacterial, cytotoxic, and antiradical activities. Compound 2 showed moderate activity against Staphylococcus warneri (DSMZ 20036), while the other compounds were inactive. The two quinones 1 and 2 were significantly cytotoxic, with IC50 values of 0.005 µM and 12.5 µM respectively, and were weakly active towards DPPH radical (IC50 >250 µg/mL).
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Affiliation(s)
- Amanda Seumo Seumo
- Faculty of Sciences, Department of Chemistry, University of Dschang, Cameroon
| | | | | | - Gabin Thierry M Bitchagno
- Faculty of Sciences, Department of Chemistry, University of Dschang, Cameroon.,Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
| | | | - Bruno N Lenta
- Department of Chemistry, Higher Teacher Training College, University of Yaounde I, Yaounde, Cameroon
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
| | - Pierre Tane
- Faculty of Sciences, Department of Chemistry, University of Dschang, Cameroon
| | - Mathieu Tene
- Faculty of Sciences, Department of Chemistry, University of Dschang, Cameroon
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