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Magnibou LM, Wouamba SCN, Yaya AJG, Mbougnia JF, Njateng GSS, Fotso GW, Henoumont C, Laurent S, Emmanuel T. Chemical profiling by UHPLC-Q-TOF-HRESI-MS/MS and antibacterial properties of Entada abyssinica (Fabaceae) constituents. Nat Prod Res 2023:1-11. [PMID: 37977828 DOI: 10.1080/14786419.2023.2280171] [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] [Received: 04/06/2023] [Accepted: 10/30/2023] [Indexed: 11/19/2023]
Abstract
A rapid untargeted UHPLC-Q-TOF-ESI-MS/MS-Based metabolomic profiling of the medicinal plant Entada abyssinica was performed. A total of 18 metabolites were detected, of which 10 could not be identified. Based on this result, an extensive chemical investigation of the CH2Cl2-MeOH (1:1) extract of this plant was carried out, leading to the isolation of a new ceramide, named entadamide (1), together with nine known compounds: monomethyl kolavate (2), 24-hydroxytormentic acid (3) chondrillasterol (4), 3-O-β-D glucopyranosylstigmasterol (5), 3-O-β-D glucopyranosylsitosterol (6), quercetin 3'-methylether (7), 2,3-dihydroxypropyl icosanoate (8), 2,3-dihydroxy-propyl 23-hydroxytricosanoate (9) and 2,3-dihydroxy-propyl 24-hydroxytetracosanoate (10). Their structures were elucidated by the analyses of their spectroscopic and spectrometric data (1D and 2D NMR, and HRESI-MS) in comparison with those reported in the literature. Furthermore, the crude extract and some isolated compounds were tested against non-ciprofloxacin resistant strains viz, Pseudomonas aeruginosa (ATCC 27853), Escherichia coli (ATCC 25922), Samonella thyphi (ATCC 19430) and Samonella enterica (NR4294). The tested samples demonstrated significant activity against all the tested bacteria (MIC values: 3.12-12.5 μg/mL).
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Affiliation(s)
- Larissa M Magnibou
- Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon
| | - Steven C N Wouamba
- Laboratoire BONHEURS-EA 751, CY Cergy-Paris Université, Gennevilliers, France
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
| | - Abel J G Yaya
- Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon
| | | | - Guy S S Njateng
- Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Ghislain W Fotso
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
| | - Celine Henoumont
- Department of General, Organic and Biomedical Chemistry, University of Mons, Mons, Belgium
| | - Sophie Laurent
- Department of General, Organic and Biomedical Chemistry, University of Mons, Mons, Belgium
| | - Talla Emmanuel
- Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon
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Fan K, Zhang L, Tan B, Njateng GSS, Qin M, Guo R, Huang X, Ding CF, Gao W, Zhang R, Yu H. Antimicrobial indole alkaloids from Tabernaemontana corymbosa. Chin J Nat Med 2023; 21:146-153. [PMID: 36871982 DOI: 10.1016/s1875-5364(23)60393-0] [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] [Received: 08/27/2022] [Indexed: 03/07/2023]
Abstract
Four unreported monoterpene indole alkaloids, tabernaecorymines B-E (1-4), together with twenty-one known indole alkaloids (5-25) were obtained from the stem bark of Tabernaemontana corymbosa. Their structures and absolute configurations were elucidated by extensive spectroscopy, quantum chemical calculations, DP4+ probability analyses and Mo2(OAc)4-induced electronic circular dichroism experiment. The antibacterial and antifungal activities of these compounds were evaluated and some of them showed significant activity against Staphylococcus aureus,Bacillus subtilis, Streptococcus dysgalactiae and Candida albicans.
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Affiliation(s)
- Kun Fan
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Lanchun Zhang
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Bangyin Tan
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Guy S S Njateng
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Malong Qin
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Ruirong Guo
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Xiaojuan Huang
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Cai-Feng Ding
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China
| | - Weimin Gao
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China.
| | - Rongping Zhang
- School of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Resources, Yunnan University of Traditional Chinese Medicine, Kunming 650500, China.
| | - Haofei Yu
- School of Pharmaceutical Sciences, Department of Zoology & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China.
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Ding CF, Ma HX, Yang J, Qin XJ, Njateng GSS, Yu HF, Wei X, Liu YP, Huang WY, Yang ZF, Wang XH, Luo XD. Antibacterial Indole Alkaloids with Complex Heterocycles from Voacanga africana. Org Lett 2018; 20:2702-2706. [PMID: 29676579 DOI: 10.1021/acs.orglett.8b00913] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Voacafricines A and B, two unique monoterpenoid indole alkaloids each bearing five fused heterocycles, were obtained from the fruits of Voacanga africana. Their structures were elucidated by extensive spectroscopic methods and computational studies. A plausible biogenetic pathway was proposed from a common precursor, 19- epi-voacristine. Both compounds exhibited potent activity against Staphylococcus aureus and Salmonella typhi, and their activities were superior to those of the well-known antibacterial drugs berberine and fibrauretine.
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Affiliation(s)
- Cai-Feng Ding
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China.,Graduate University of the Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Hong-Xia Ma
- State Key Laboratory of Respiratory Disease , Guangzhou Medical University , Guangzhou 510120 , People's Republic of China
| | - Jing Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Guy S S Njateng
- Department of Biochemistry, Faculty of Science , University of Dschang , P.O. Box 67, Dschang , Cameroon
| | - Hao-Fei Yu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China.,Graduate University of the Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Xin Wei
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China.,Graduate University of the Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Ya-Ping Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Wan-Yi Huang
- State Key Laboratory of Respiratory Disease , Guangzhou Medical University , Guangzhou 510120 , People's Republic of China
| | - Zi-Feng Yang
- State Key Laboratory of Respiratory Disease , Guangzhou Medical University , Guangzhou 510120 , People's Republic of China
| | - Xin-Hua Wang
- State Key Laboratory of Respiratory Disease , Guangzhou Medical University , Guangzhou 510120 , People's Republic of China
| | - Xiao-Dong Luo
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China.,State Key Laboratory of Respiratory Disease , Guangzhou Medical University , Guangzhou 510120 , People's Republic of China
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Li ZJ, Njateng GSS, He WJ, Zhang HX, Gu JL, Chen SN, Du ZZ. Chemical composition and antimicrobial activity of the essential oil from the edible aromatic plant Aristolochia delavayi. Chem Biodivers 2014; 10:2032-41. [PMID: 24243612 DOI: 10.1002/cbdv.201300066] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Indexed: 01/11/2023]
Abstract
The essential oil obtained by hydrodistillation from the aerial parts of Aristolochia delavayi Franch. (Aristolochiaceae), a unique edible aromatic plant consumed by the Nakhi (Naxi) people in Yunnan, China, was investigated using GC/MS analysis. In total, 95 components, representing more than 95% of the oil composition, were identified, and the main constituents found were (E)-dec-2-enal (52.0%), (E)-dodec-2-enal (6.8%), dodecanal (3.35%), heptanal (2.88%), and decanal (2.63%). The essential oil showed strong inhibitory activity (96% reduction) of the production of bacterial volatile sulfide compounds (VSC) by Klebsiella pneumoniae, an effect that was comparable with that of the reference compound citral (91% reduction). Moreover, the antimicrobial activity of the essential oil and the isolated major compound against eight bacterial and six fungal strains were evaluated. The essential oil showed significant antibacterial activity against Providencia stuartii and Escherichia coli, with minimal inhibitory concentrations (MIC) ranging from 3.9 to 62.5 μg/ml. The oil also showed strong inhibitory activity against the fungal strains Trichophyton ajelloi, Trichophyton terrestre, Candida glabrata, Candida guilliermondii, and Cryptococcus neoformans, with MIC values ranging from 3.9 to 31.25 μg/ml, while (E)-dec-2-enal presented a lower antifungal activity than the essential oil.
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Affiliation(s)
- Zhi-Jian Li
- School of Life Sciences, Yunnan University, Kunming 650091, P. R. China; State Key Laboratory of Phytochemistry and Plant Resources of West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, P. R. China, (phone: +86-871-5223224; fax: +86-871-5216335)
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Mouokeu RS, Ngane RAN, Njateng GSS, Kamtchueng MO, Kuiate JR. Antifungal and antioxidant activity of Crassocephalum bauchiense (Hutch.) Milne-Redh ethyl acetate extract and fractions (Asteraceae). BMC Res Notes 2014; 7:244. [PMID: 24742210 PMCID: PMC4017830 DOI: 10.1186/1756-0500-7-244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 04/09/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Crassocephalum bauchiense is a flowering plant, found in the West Region of Cameroon. Previous studied has highlighted the antibacterial and the dermal toxicological safety as well as the immunomodulatory activities of the ethyl acetate extract of its dry leaves. As an extension of the previous researches, the current work has been undertaken to evaluate the in vitro antifungal and antioxidant activities of C. bauchiense dried leaves ethyl acetate extract and fractions. METHODS The extract was obtained by maceration in ethyl acetate and further fractionated into six fractions labeled F1 to F6 by flash chromatography. The antifungal activity of the extract and fractions against yeasts and dermatophytes was evaluated using broth microdilution method. Antioxidant activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH), nitric oxide (NO) and β-carotene - linoleic acid assays. RESULTS The extract (MIC = 0.125 - 4 mg/ml) was found to be more active on dermatophytes and yeasts compared to the fractions. The ethyl acetate extract and fractions exhibited strong scavenging activity on DPPH (CI50 = 28.57 - 389.38 μg/ml). The fractions F3 and F6 expressed best antioxidant activity on DPPH radicals compared to the crude extract. CONCLUSION The results of these findings clearly showed that C. bauchiense ethyl acetate extract has a significant antifungal and antioxidant activity. It is therefore a source of active compounds that might be used as antifungal and antioxidant agents.
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Affiliation(s)
- Raymond Simplice Mouokeu
- Laboratory of Microbiology and Food Quality Control, Institute of Fisheries and Aquatic Sciences, University of Douala, P,O, Box 7236, Douala, Cameroon.
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