1
|
Djikam Sime G, Mbabi Nyemeck N, Zintchem AAA, October N, Missi MB, Farooq R, Khan KM, Ngono Bikobo DS, Choudhary MI, Pegnyemb DE. Secondary metabolites of the leaves of Tricalysia atherura N. Hallé (Rubiaceae) and their potential antiplasmodial activity. Nat Prod Res 2023; 37:2830-2840. [PMID: 36282891 DOI: 10.1080/14786419.2022.2137796] [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: 03/01/2022] [Revised: 10/03/2022] [Accepted: 10/08/2022] [Indexed: 10/31/2022]
Abstract
One monoterpene indole alkaloid, atheruramine (1) bearing an ether bridge linking, one hydrobenzoin derivative, tricalydioloside (2) and two ursane-type triterpenes, atherurosides (A and B) (3 and 4) were isolated from the leaves of Tricalysia atherura, together with eight known compounds. The structures of these new compounds were elucidated on the basis of the results of spectroscopic analysis, and the relative configurations of compounds 1-3 were established by NOE difference. Four of the metabolites were screened in vitro against both chloroquine (CQ)-sensitive (3D7) and -resistant (Dd2) strains of Plasmodium falciparum; they were found to exhibit moderate activity against chloroquine-resistant (Dd2) (IC50 64.99-92.29 μg/mL). Meanwhile, crude extract possesses high antiplasmodial activity against both 3D7 and Dd2 strains of P. falciparum (IC50 4.39-7.54 μg/mL) and high selectivity indices values (SI > 10) and was found to be safe.
Collapse
Affiliation(s)
- Gwladys Djikam Sime
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon
- International Center for Chemical and Biological Sciences, H.E.J Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | - Norbert Mbabi Nyemeck
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon
- Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Auguste Abouem A Zintchem
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon
- Department of Chemistry, Higher Teacher's Training College, University of Yaoundé 1, Yaoundé, Cameroon
| | - Natasha October
- Department of Chemistry, University of Pretoria, Hatfield, South Africa
| | - Marius Balemaken Missi
- Faculty of Science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon
- Department of Chemistry, University of Pretoria, Hatfield, South Africa
| | - Rabia Farooq
- International Center for Chemical and Biological Sciences, H.E.J Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | - Khalid Mohammed Khan
- International Center for Chemical and Biological Sciences, H.E.J Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | | | - Muhammad Iqbal Choudhary
- International Center for Chemical and Biological Sciences, H.E.J Research Institute of Chemistry, University of Karachi, Karachi, Pakistan
| | | |
Collapse
|
2
|
Cheek M, Alvarez-Aguirre MG, Grall A, Sonké B, Howes MJR, Larridon I. Kupeantha (Coffeeae, Rubiaceae), a new genus from Cameroon and Equatorial Guinea. PLoS One 2018; 13:e0199324. [PMID: 29944676 PMCID: PMC6019108 DOI: 10.1371/journal.pone.0199324] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 05/19/2018] [Indexed: 01/27/2023] Open
Abstract
Two new coffee relatives (tribe Coffeeae, Rubiaceae), discovered during botanical expeditions to Cameroon, are examined for generic placement, and the placement of three previously known species (Argocoffeopsis fosimondi, A. spathulata and Calycosiphonia pentamera) is reinvestigated using plastid sequence (accD-psa1, rpl16, trnL-F) and morphological data. Seed biochemistry of the new species and pollen micromorphology (only one of the two species) are also studied. Based on the plastid sequence data, the new taxa are nested in a well-supported monophyletic group that includes Argocoffeopsis and Calycosiphonia. Within this clade, three well-supported subclades are recovered that are morphologically easy to diagnose: (1) Calycosiphonia (excluding C. pentamera), (2) Argocoffeopsis (excluding A. fosimondi and A. spathulata), and (3) a clade including the above excluded species, in addition to the new species. Based on the results, Kupeantha, a new genus of five species, is described, including two new Critically Endangered taxa from the Highlands of Cameroon: Kupeantha ebo and K. kupensis. Phytochemical analysis of Kupeantha seeds reveals compounds assigned as hydroxycinnamic acid derivatives, amino acids and ent-kaurane diterpenoids; caffeine was not detected. Kupeantha is the first new genus described in tribe Coffeeae in 40 years.
Collapse
Affiliation(s)
- Martin Cheek
- Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom
- * E-mail: (MC); (IL)
| | | | - Aurélie Grall
- Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom
| | - Bonaventure Sonké
- University of Yaoundé I, Higher Teacher’s Training College, Plant Systematic and Ecology Laboratory, Yaoundé, Cameroon
- Université Libre de Bruxelles, Herbarium et Bibliothèque de Botanique africaine, Brussels, Belgium
- Missouri Botanical Garden, St. Louis, Missouri, United States of America
| | | | - Isabel Larridon
- Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom
- Ghent University, Department of Biology, Research Group Spermatophytes, Campus Ledeganck, Ghent, Belgium
- * E-mail: (MC); (IL)
| |
Collapse
|
3
|
Muhammad D, Lalun N, Bobichon H, Le Magrex Debar E, Gangloff SC, Nour M, Voutquenne-Nazabadioko L. Triterpenoids from the leaves of Alphitonia xerocarpus Baill and their biological activity. PHYTOCHEMISTRY 2016; 129:45-57. [PMID: 27452452 DOI: 10.1016/j.phytochem.2016.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/11/2016] [Accepted: 07/14/2016] [Indexed: 06/06/2023]
Abstract
Ten previously undescribed triterpenoid saponins and a previously undescribed norlupane triterpenoid were isolated, with three known saponins, four known flavonoids, two known lupane derivatives, sitosterol and 6'-heptadecanoyl-3-O-β-d-glucopyranosylsitosterol from the leaves of Alphitonia xerocarpus (Rhamnaceae), an endemic tree of New Caledonia. The chemical structures of the purified compounds were identified by nuclear magnetic resonance and mass spectrometry. The isolated compounds were tested for their antioxidant, antityrosinase, antibacterial and cytotoxic activity. The aqueous methanol extract showed antioxidant activity (DPPH assay) due to the presence of rutin. Ceanothenic acid showed good cytotoxic activity against a KB cell line (IC50 = 2.6 μM) and antibacterial activity against Staphylococcus aureus and Enterococcus faecalis with MIC values of 8 and 16 μg/mL, respectively. The previously undescribed 29-hydroxyceanothenic acid exhibited moderate cytotoxic activity (IC50 = 10 μM), good antibacterial activity against S. aureus (MIC = 4 μg/mL) and moderate antibacterial activity against E. faecalis (MIC = 16 μg/mL).
Collapse
Affiliation(s)
- Dima Muhammad
- UMR CNRS 7312, Université de Reims Champagne-Ardenne, Bât. 18, Moulin, de la Housse, BP 1039, 51687 Reims Cedex 2, France
| | - Nathalie Lalun
- CNRS FRE 3481, Université de Reims Champagne Ardenne, 51 rue cognacq-Jay, 51095 Reims Cedex, France
| | - Hélène Bobichon
- CNRS FRE 3481, Université de Reims Champagne Ardenne, 51 rue cognacq-Jay, 51095 Reims Cedex, France
| | - Elisabeth Le Magrex Debar
- EA 4691, Laboratoire de Microbiologie, UFR de Pharmacie, 1 Rue du Maréchal Juin, 51096 Reims Cedex, France
| | - Sophie C Gangloff
- EA 4691, Laboratoire de Microbiologie, UFR de Pharmacie, 1 Rue du Maréchal Juin, 51096 Reims Cedex, France
| | - Mohammed Nour
- Laboratoire Insulaire du Vivant et de l'Environnement (LIVE), EA 4243, Université de la Nouvelle-Calédonie, BP R4, 98851 Nouméa Cedex, New Caledonia
| | | |
Collapse
|
4
|
Pičmanová M, Møller BL. Apiose: one of nature's witty games. Glycobiology 2016; 26:430-42. [DOI: 10.1093/glycob/cww012] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/24/2016] [Indexed: 11/13/2022] Open
|
5
|
Martins D, Nunez CV. Secondary metabolites from Rubiaceae species. Molecules 2015; 20:13422-95. [PMID: 26205062 PMCID: PMC6331836 DOI: 10.3390/molecules200713422] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 07/11/2015] [Accepted: 07/13/2015] [Indexed: 11/16/2022] Open
Abstract
This study describes some characteristics of the Rubiaceae family pertaining to the occurrence and distribution of secondary metabolites in the main genera of this family. It reports the review of phytochemical studies addressing all species of Rubiaceae, published between 1990 and 2014. Iridoids, anthraquinones, triterpenes, indole alkaloids as well as other varying alkaloid subclasses, have shown to be the most common. These compounds have been mostly isolated from the genera Uncaria, Psychotria, Hedyotis, Ophiorrhiza and Morinda. The occurrence and distribution of iridoids, alkaloids and anthraquinones point out their chemotaxonomic correlation among tribes and subfamilies. From an evolutionary point of view, Rubioideae is the most ancient subfamily, followed by Ixoroideae and finally Cinchonoideae. The chemical biosynthetic pathway, which is not so specific in Rubioideae, can explain this and large amounts of both iridoids and indole alkaloids are produced. In Ixoroideae, the most active biosysthetic pathway is the one that produces iridoids; while in Cinchonoideae, it produces indole alkaloids together with other alkaloids. The chemical biosynthetic pathway now supports this botanical conclusion.
Collapse
Affiliation(s)
- Daiane Martins
- Bioprospection and Biotechnology Laboratory, Technology and Innovation Coordenation, National Research Institute of Amazonia, Av. André Araújo, 2936, Petrópolis, Manaus, AM 69067-375, Brazil
| | - Cecilia Veronica Nunez
- Bioprospection and Biotechnology Laboratory, Technology and Innovation Coordenation, National Research Institute of Amazonia, Av. André Araújo, 2936, Petrópolis, Manaus, AM 69067-375, Brazil.
| |
Collapse
|
6
|
|