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Hussein ME, Mohamed OG, El-Fishawy AM, El-Askary HI, Hamed AA, Abdel-Aziz MM, Alnajjar R, Belal A, Naglah AM, Almehizia AA, Al-Karmalawy AA, Tripathi A, El Senousy AS. Anticholinesterase Activity of Budmunchiamine Alkaloids Revealed by Comparative Chemical Profiling of Two Albizia spp., Molecular Docking and Dynamic Studies. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11233286. [PMID: 36501324 PMCID: PMC9738009 DOI: 10.3390/plants11233286] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/22/2022] [Accepted: 11/15/2022] [Indexed: 05/31/2023]
Abstract
Alzheimer's disease remains a global health challenge and an unmet need requiring innovative approaches to discover new drugs. The current study aimed to investigate the inhibitory activity of Albizia lucidior and Albizia procera leaves against acetylcholinesterase enzyme in vitro and explore their chemical compositions. Metabolic profiling of the bioactive plant, A. lucidior, via UHPLC/MS/MS-based Molecular Networking highlighted the richness of its ethanolic extract with budmunchiamine alkaloids, fourteen budmunchiamine alkaloids as well as four new putative ones were tentatively identified for the first time in A. lucidior. Pursuing these alkaloids in the fractions of A. lucidior extract via molecular networking revealed that alkaloids were mainly concentrated in the ethyl acetate fraction. In agreement, the alkaloid-rich fraction showed the most promising anticholinesterase activity (IC50 5.26 µg/mL) versus the ethanolic extract and ethyl acetate fraction of A. lucidior (IC50 24.89 and 6.90 µg/mL, respectively), compared to donepezil (IC50 3.90 µg/mL). Furthermore, deep in silico studies of tentatively identified alkaloids of A. lucidior were performed. Notably, normethyl budmunchiamine K revealed superior stability and receptor binding affinity compared to the two used references: donepezil and the co-crystallized inhibitor (MF2 700). This was concluded based on molecular docking, molecular dynamics simulations and molecular mechanics generalized born/solvent accessibility (MM-GBSA) calculations.
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Affiliation(s)
- Mai E. Hussein
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo 11562, Egypt
| | - Osama G. Mohamed
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo 11562, Egypt
- Natural Products Discovery Core, Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ahlam M. El-Fishawy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo 11562, Egypt
| | - Hesham I. El-Askary
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo 11562, Egypt
| | - Ahmed A. Hamed
- Microbial Chemistry Department, National Research Centre, 33 El-Buhouth Street, Dokki, Giza 12622, Egypt
| | - Marwa M. Abdel-Aziz
- Regional Center for Mycology and Biotechnology (RCMB), Al-Azhar University, Cairo 11651, Egypt
| | - Radwan Alnajjar
- Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi 16063, Libya
- PharmD, Faculty of Pharmacy, Libyan International Medical University, Benghazi 16063, Libya
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Amany Belal
- Medicinal Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Ahmed M. Naglah
- Drug Exploration and Development Chair (DEDC), Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
- Peptide Chemistry Department, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Abdulrahman A. Almehizia
- Drug Exploration and Development Chair (DEDC), Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmed A. Al-Karmalawy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Ahram Canadian University, 6th of October City, Giza 12566, Egypt
| | - Ashootosh Tripathi
- Natural Products Discovery Core, Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Amira S. El Senousy
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Kasr el Aini St., Cairo 11562, Egypt
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Meriem A, Msaada K, Sebai E, Aidi Wannes W, Salah Abbassi M, Akkari H. Antioxidant, anthelmintic and antibacterial activities of red juniper (Juniperus phoenicea L.) essential oil. JOURNAL OF ESSENTIAL OIL RESEARCH 2021. [DOI: 10.1080/10412905.2021.1941338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Aouadi Meriem
- Laboratory of Parasitology, National School of Veterinary Medicine of Sidi Thabet, University of Manouba, Tunisia
- Faculty of Sciences of Tunis, University of Tunis El Manar, University Campus, Tunis, Tunisia
| | - Kamel Msaada
- Laboratory of Aromatic and Medicinal Plants, Biotechnology Center in Borj Cedria Technopole, Hammam Lif, Tunisia
| | - Essia Sebai
- Laboratory of Parasitology, National School of Veterinary Medicine of Sidi Thabet, University of Manouba, Tunisia
- Faculty of Sciences of Tunis, University of Tunis El Manar, University Campus, Tunis, Tunisia
| | - Wissem Aidi Wannes
- Laboratory of Aromatic and Medicinal Plants, Biotechnology Center in Borj Cedria Technopole, Hammam Lif, Tunisia
| | - Mohamed Salah Abbassi
- Institut de la Recherche Vétérinaire de Tunisie, Université Tunis El Manar, Tunis, Tunisia
- Faculté de Médecine de Tunis, Université Tunis el Manar, Tunisia
| | - Hafidh Akkari
- Laboratory of Parasitology, National School of Veterinary Medicine of Sidi Thabet, University of Manouba, Tunisia
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Antiprotozoal investigation of three Combretum species (Combretaceae) growing in Nigeria. HERBA POLONICA 2020. [DOI: 10.2478/hepo-2019-0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Summary
Introduction:
Combretum species has been utilised for decades in African indigenous medical practices for the treatment of several parasitic infections.
Objectives: This study aims at investigating the antileishmanial, antiplasmodial and antitrypanosomal properties of Combretum racemosum, Combretum platypterum and Combretum zenkeri.
Methods: The leaf extracts of the plants were screened against two strains of Plasmodium falciparum using Plasmodium lactate dehydrogenase (pLDH) assay; promastigote and amastigote forms of Leishmania donovani; and Trypanosoma brucei brucei using Alamar Blue assay. Cytotoxicity screening were also carried out on African green monkey kidney cell line (Vero) and human monocytic leukemia (THP-1) cell lines.
Results:
C. racemosum was active against chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of P. falciparum (IC50 of 25.6 and 26.7 µg/ml, respectively) and exerted significant antiprotozoal activities against T. brucei brucei (IC50 = 18.44 µg/ml). The extract of C. platypterum displayed a slightly lower antiplasmodial activity when compared to C. racemosum, while C. zenkeri was inactive against the parasites. In addition, the extracts failed to display significant inhibitory activity on the proliferation of L. donovani.
Conclusions: This study supports the ethnomedicinal use of C. racemosum. Further research needs to be carried out to identify the antiprotozoal compounds in C. racemosum, as this could be explored for possible antiprotozoal drug development.
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Larit F, León F, Benyahia S, Cutler SJ. Total Phenolic and Flavonoid Content and Biological Activities of Extracts and Isolated Compounds of Cytisus villosus Pourr. Biomolecules 2019; 9:biom9110732. [PMID: 31766217 PMCID: PMC6920997 DOI: 10.3390/biom9110732] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 11/09/2019] [Accepted: 11/11/2019] [Indexed: 12/11/2022] Open
Abstract
The aim of this study was to evaluate the total phenolic and flavonoid content, and the in vitro antioxidant, anti-inflammatory, antibacterial, antifungal, antimalarial, cytotoxicity, and antiprotozoal activities of the Algerian plant Cytisus villosus Pourr. (Syn. Cytisus triflorus L’Hérit.). Additionally, the radioligand displacement affinity on opioid and cannabinoid receptors was assessed for the extracts and isolated pure compounds. The hydro alcoholic extract of the aerial part of C. villosus was partitioned with chloroform (CHCl3), ethyl acetate (EtOAc), and n-butanol (n-BuOH). The phenolic content of the C. villosus extracts was evaluated using a modified Folin–Ciocalteau method. The total flavonoid content was measured spectrometrically using the aluminum chloride colorimetric assay. The known flavonoids genistein (1), chrysin (2), chrysin-7-O-β-d-glucopyranoside (3), and 2″-O-α-l-rhamnosylorientin (4) were isolated. The antioxidant activities of the extracts and isolated compounds were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DDPH) and cellular antioxidant activity (CAA) assays. The plant extracts showed moderate antioxidant activity. EtOAc and n-BuOH extracts showed moderate anti-inflammatory activity through the inhibition of induced nitric oxide synthase (iNOS) with IC50 values of 48 and 90 µg/mL, respectively. The isolated pure compounds 1 and 3 showed good inhibition of Inducible nitric oxide synthase (iNOS) with IC50 values of 9 and 20 µg/mL, respectively. Compounds 1 and 2 exhibited lower inhibition of Nuclear Factor kappa-light-chain-enhancer of activated B cells (NF-κB) with IC50 values of 28 and 38 µg/mL, respectively. Furthermore, the extracts and isolated pure compounds have been shown to exhibit low affinity for cannabinoid and opioid receptors. Finally, n-BuOH extract was a potent inhibitor of Trypanosoma brucei with IC50 value of 7.99 µg/mL and IC90 value of 12.61 µg/mL. The extracts and isolated compounds showed no antimicrobial, antimalarial nor antileishmanial activities. No cytotoxic effect was observed on cancer cell lines. The results highlight this species as a promising source of anti-inflammatory and antitrypanosomal agents.
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Affiliation(s)
- Farida Larit
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677-1848, USA; (F.L.); (S.J.C.)
- Département de Chimie, Faculté des Sciences Exactes, Université des Frères Mentouri Constantine 1, Constantine, Route d’Aine El Bey, 25000 Constantine, Algeria
- Correspondence: ; Tel.: +213-664-79-89
| | - Francisco León
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677-1848, USA; (F.L.); (S.J.C.)
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Samira Benyahia
- Laboratoire de Synthèse Organique, Modélisation et Optimisation des Procèdes (LOMOP), Université Badji Mokhtar, Faculté des Sciences, Département de Chimie, 23000 Annaba, Algeria;
| | - Stephen J. Cutler
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS 38677-1848, USA; (F.L.); (S.J.C.)
- College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA
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Masila VM, Midiwo JO, Zhang J, Gisacho BM, Munayi R, Omosa LK, Wiggers FT, Jacob MR, Walker LA, Muhammad I. Anti-Vancomycin-resistant Enterococcus faecium and E. faecalis Activities of (-)-Gossypol and Derivatives from Thespesia garckeana. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The root extract of Thespesia garckeana yielded three known oxidatively coupled sesquiterpenoids, namely (-)-gossypol (1) and two of its derivatives (-)-6-methoxygossypol (2) and (+)-6,6′-dimethoxygossypol (3), and the stem bark afforded ( E)-docosyl-3-(3,4-dihydroxyphenyl) acrylate (4), stigmasterol (5) and betulinic acid (6). The structures of the isolated compounds were determined on the basis of full spectral data (1D and 2D NMR and HRMS) and comparison with literature values. Compound 1 showed potent antibacterial activity against vancomycin-resistant Enterococcus faecium (VRE) with IC50/MIC/MBC values of 1.71/4.82/19.31 μM, respectively, whereas the reference standard vancomycin was found to be inactive. The mono- and di-methoxylated derivatives of this compound, (-)-6-methoxygossypol (2) and (+)-6,6′-dimethoxygossypol (3), were less active with respective IC50/MIC/MBC values of 2.73/4.70/9.40 μM and 6.14/18.32/18.32 μM against this microbe. Compound 2 was more potent than 1 against the low level VRE strain with IC50/MIC/MBC values of 4.34/9.40/9.40 μM ( vs 5.23/19.31/19.31μM for 1). This compound also showed interesting activities against Candida glabrata with an IC50 value of 2.97 μM, but was less active against methicillin-resistant S. aureus (MRSA) exhibiting an IC50 value of 17.33 μM. Compound 1 demonstrated modest activity against the other microbes tested including C. glabrata, S. aureus and MRSA with IC50 values of 0.73, 9.15 and 8.99 μM, respectively.
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Affiliation(s)
- Veronica M. Masila
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197, 00100, Nairobi, Kenya
| | - Jacob O. Midiwo
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197, 00100, Nairobi, Kenya
| | - Jin Zhang
- National Centre for Natural Products Research and School of Pharmacy, University of Mississippi, MS 38677, USA
| | - Bonface M. Gisacho
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197, 00100, Nairobi, Kenya
| | - Renee Munayi
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197, 00100, Nairobi, Kenya
| | - Leonidah K. Omosa
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197, 00100, Nairobi, Kenya
| | - Frank T. Wiggers
- National Centre for Natural Products Research and School of Pharmacy, University of Mississippi, MS 38677, USA
| | - Melissa R. Jacob
- National Centre for Natural Products Research and School of Pharmacy, University of Mississippi, MS 38677, USA
| | - Larry A. Walker
- National Centre for Natural Products Research and School of Pharmacy, University of Mississippi, MS 38677, USA
- Department of Biomolecular Sciences, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, MS 38677, USA
| | - Ilias Muhammad
- National Centre for Natural Products Research and School of Pharmacy, University of Mississippi, MS 38677, USA
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Ndunda B, Langat MK, Midiwo JO, Omosa LK. Diterpenoid Derivatives of Kenyan Croton sylvaticus. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Kenyan Croton sylvaticus Hochst. ex Krauss gave four clerodane diterpenoids, the new ent–3,13 E-clerodadiene-15-formate (1), the known 15-acetoxy- ent-3,13 E-clerodadiene (2), ent-3,13 E-clerodadien-15-ol (3) and hardwickiic acid (4), two known halimane diterpenoids, penduliflaworosin (5) and crotohalimaneic acid (6) and one labdane diterpenoid, labda-13 E-ene-8α,15-diol (7). The compounds, when tested for their anti-microbial activities against Bacillus subtilis, Xanthomonas campestris and Candida albicans, were found to be inactive.
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Affiliation(s)
- Beth Ndunda
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197-00100, Nairobi, Kenya
- Department of Chemistry, FEPS, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom
| | - Moses K. Langat
- Department of Chemistry, FEPS, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom
| | - Jacob O. Midiwo
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197-00100, Nairobi, Kenya
| | - Leonidah K. Omosa
- Department of Chemistry, School of Physical Sciences, University of Nairobi, PO Box 30197-00100, Nairobi, Kenya
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Bapela MJ, Meyer JJM, Kaiser M. In vitro antiplasmodial screening of ethnopharmacologically selected South African plant species used for the treatment of malaria. JOURNAL OF ETHNOPHARMACOLOGY 2014; 156:370-3. [PMID: 25245771 DOI: 10.1016/j.jep.2014.09.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 08/16/2014] [Accepted: 09/10/2014] [Indexed: 05/18/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Plant species used by Venda people of South Africa in the treatment of malaria and associated symptoms were evaluated for their antiplasmodial efficacy as well as cytotoxic properties and some showed significant activity. MATERIALS AND METHODS In vitro antiplasmodial activity and cytotoxic properties were evaluated on 20 indigenous plant species. Ground plant material was extracted in dichloromethane: 50% methanol (1:1). Antiplasmodial activity was evaluated against the chloroquine-sensitive strain of Plasmodium falciparum (NF54). The cytotoxicity of the plant extracts were assessed against mammalian L-6 rat skeletal myoblast cells and the selectivity index (SI) calculated. RESULTS Of the 43 plant extracts evaluated, 10 exhibited pronounced antiplasmodial activity (IC₅₀ ≤ 5 μg/ml) with good therapeutic indices (SI ≥ 10). Lipophilic plant extracts were relatively more potent than polar extracts. Tabernaemontana elegans Stapf. (Apocynaceae) and Vangueria infausta Burch. subsp. infausta (Rubiaceae) extracts displayed significant antiplasmodial activity (IC₅₀ < 2 μg/ml). CONCLUSION Findings of this study partly support the ethnomedical use of the investigated plant species by Venda people as antimalarial remedies. The study also highlights some of the knowledge gaps that require further phytochemical studies on the specified plant species.
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Affiliation(s)
- M Johanna Bapela
- Department of Plant Science, Plant Sciences Complex, University of Pretoria, Hatfield 0083, South Africa.
| | - J J Marion Meyer
- Department of Plant Science, Plant Sciences Complex, University of Pretoria, Hatfield 0083, South Africa
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4002 Basel, Switzerland
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Ahmed MH, Ibrahim MA, Zhang J, Melek FR, El-Hawary SS, Jacob MR, Muhammad I. Methicillin-resistant Staphylococcus aureus, Vancomycin-resistant Enterococcus faecalis and Enterococcus faecium active Dimeric Isobutyrylphloroglucinol from Ivesia gordonii. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400900223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Bioassay-guided fractionation of the chloroform soluble fraction of stem, leaf, and flower extracts of the American plant Ivesia gordonii led to the isolation of a new dimeric acylphloroglucinol, 3,3′-diisobutyryl-2,6′-dimethoxy-4,6,2′,4′-tetrahydroxy-5,5′dimethyldiphenyl methane (1), to which we have assigned the trivial name of ivesinol (1), together with a known monomeric acylphloroglucinol, 1,5-dihydroxy-2-(2′-methylpropionyl)-3-methoxy-6-methylbenzene (2). The structures of the isolated compounds were characterized using 1D- and 2D- NMR spectroscopy, including COSY, HMQC, HMBC, and ROESY experiments, as well as mass spectrometry. Ivesinol (1) showed potent activity against Staphylococcus aureus (SA) and methicillin-resistant S. aureus (MRSA) with IC50/MIC/MBC values of 0.10/1.25/>20 μg/mL and 0.05/0.31/>20 μg/mL, respectively (vs. IC50/MIC/MBC 0.13/0.5/1.0 μg/mL and 0.13/0.5/1.0 μg/mL of ciprofloxacin), while the corresponding monomer 2 was found to be less active. Compound 1 also demonstrated strong activity against vancomycin-resistant Enteococcus faecium ( VRE) with IC50/MIC/MBC values of 0.22/1.25/>20 μg/mL, whereas the reference standard ciprofloxacin was found to be inactive against this strain. In addition, compound 2 showed moderate activity against two species of Candida and Cryptococcus neoformans, while 1 was inactive against these fungi. In order to evaluate the influence of the acyl group(s) in phloroglucinol (3) as a ligand, the mono- (4) and diacetylphloroglucinol (5) were prepared from 3, and evaluated for their in vitro SA, MRSA, and VRE activities; 2,4-diacetylphloroglucinol (5) showed potent activity, like 1, against SA, MRSA, and VRE (ATCC 700221) with IC50/ MIC values of 0.3/2.5, 0.23/2.5, and 0.86/2.5 μg/mL, respectively, while 4 was inactive.
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Affiliation(s)
- Marwa H. Ahmed
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Chemistry of Natural Compounds Department, National Research Centre, Dokki 12622, Giza, Egypt
| | - Mohamed Ali Ibrahim
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Chemistry of Natural Compounds Department, National Research Centre, Dokki 12622, Giza, Egypt
| | - Jin Zhang
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Farouk R. Melek
- Chemistry of Natural Compounds Department, National Research Centre, Dokki 12622, Giza, Egypt
| | - Seham S. El-Hawary
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | - Melissa R. Jacob
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Ilias Muhammad
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA
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Machumi F, Midiwo JO, Jacob MR, Khan SI, Tekwani BL, Zhang J, Walker LA, Muhammad I. Phytochemical, Antimicrobial and Antiplasmodial Investigations of Terminalia brownii. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800619] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Phytochemical investigation of the ethyl acetate-soluble fraction of stem bark extract of an African medicinal plant Terminalia brownii led to the isolation of a new oleanane-type triterpenoid, along with seven known triterpenoids, seven ellagic acid derivatives, and 3- O-β-D-glucopyranosyl-β-sitosterol. The new compound was identified using spectroscopic methods, notably 1D- and 2D NMR, as 3β,24- O-ethylidenyl-2α,19α-dihydroxyolean-12-en-28-oic acid. The isolated compounds were evaluated for their antimicrobial and antiplasmodial activities. Two compounds with a galloyl group (4 and 6) were found to be active against chloroquine sensitive (D6) and chloroquine resistant (W2) strains of Plasmodium falciparum, whereas three ellagic acid derivatives (5–7) were found active against three species of fungi and one species of bacteria.
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Affiliation(s)
- Francis Machumi
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Jacob O. Midiwo
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
| | - Melissa R. Jacob
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Shabana I. Khan
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Departments of Pharmacognosy and School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Babu L. Tekwani
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Departments of Pharmacology, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Jin Zhang
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Larry A. Walker
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
- Departments of Pharmacology, School of Pharmacy, University of Mississippi, University, MS 38677, USA
| | - Ilias Muhammad
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA
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Machumi F, Yenesew A, Midiwo JO, Heydenreich M, Kleinpeter E, Tekwani BL, Khan SI, Walker LA, Muhammad I. Antiparasitic and Anticancer Carvotacetone Derivatives of Sphaeranthus bullatus. Nat Prod Commun 2012. [DOI: 10.1177/1934578x1200700902] [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
The CH2Cl2-MeOH (1:1) extract of the aerial parts of Sphaeranthus bullatus, an annual herb native to tropical East Africa, showed activity against chloroquine sensitive D6 (IC50 9.7 μg/mL) and chloroquine resistant W2 (IC50 15.0 μg/mL) strains of Plasmodium falciparum. Seventeen secondary metabolites were isolated from the extract through conventional chromatographic techniques and identified using various spectroscopic methods. The compounds were evaluated for their in vitro antiplasmodial, antileishmanial and anticancer activities revealing activity of four carvotacetone derivatives, namely 3-acetoxy-7-hydroxy-5-tigloyloxycarvotacetone (1), 3,7-dihydroxy-5-tigloyloxycarvotacetone (2), 3-acetoxy-5,7-dihydroxycarvotacetone (3) and 3,5,7-trihydroxy-carvotacetone (4); with antiplasmodial IC50 values of 1.40, 0.79, 0.60 and 3.40 μg/mL, respectively, against chloroquine sensitive D6 strains of P. falciparum; antiplasmodial activity of IC50 2.00, 0.90, 0.68 and 2.80 μg/mL, respectively, against chloroquine resistant W2 strains of P. falciparum; antileishmanial IC50 values of 0.70, 3.00, 0.70 and 17.00 μg/mL, respectively, against the parasite L. donovanii promastigotes, and anticancer activity against human SK-MEL, KB, BT-549 and SK-OV-3 tumor cells, with IC50 values between <1.1 - 5.3 μg/mL for 1-3. In addition, cytotoxic effects of the active compounds were evaluated against monkey kidney fibroblasts (VERO) and pig kidney epithelial cells (LLC-PK11). The structures of carvotacetone derivatives were determined by 1D and 2D NMR spectroscopy; the absolute stereochemical configuration of 3-acetoxy-7-hydroxy-5-tigloyloxycarvotacetone (1) was determined as 3 R, 4 R, 5 S by circular dichroism, specific rotation, 1H NMR and 2D NMR ROESY and NOESY experiments.
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Affiliation(s)
- Francis Machumi
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Abiy Yenesew
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Jacob O. Midiwo
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Matthias Heydenreich
- Institut für Chemie, Universität Potsdam, P.O. Box 60 15 53, D-14476 Potsdam, Germany
| | - Erich Kleinpeter
- Institut für Chemie, Universität Potsdam, P.O. Box 60 15 53, D-14476 Potsdam, Germany
| | - Babu L. Tekwani
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Shabana I. Khan
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
- Department of Pharmacognosy, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Larry A. Walker
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Ilias Muhammad
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
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11
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Rahman AA, Samoylenko V, Jain SK, Tekwani BL, Khan SI, Jacob MR, Midiwo JO, Hester JP, Walker LA, Muhammad I. Antiparasitic and Antimicrobial Isoflavanquinones from Abrus schimperi. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100601120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The EtOH extract of Abrus schimperi (Fabaceae), collected in Kenya, demonstrated significant activity against Leishmania donovani promastigotes with IC50 value of 3.6 μg/mL. Bioassay-guided fractionation of CHCl3 fraction using Centrifugal Preparative TLC afforded two antiparasitic isoflavanquinones, namely amorphaquinone (1) and pendulone (2). They displayed IC50 values of 0.63 μg/mL and 0.43 μg/mL, respectively, against L. donovani promastigotes. Both the compounds were also evaluated against L. donovani axenic amastigotes and amastigotes in THP1 macrophage cultures. In addition, compounds 1 and 2 showed antiplasmodial activity against Plasmodium falciparum D6 and W2 strains, while 2 displayed antibacterial activity against Staphylococcus aureus and methicillin-resistant S. aureus (each IC50 1.44 μg/mL). The 1H and 13C data of 1, not fully assigned previously, were unambiguously assigned using 1D and 2D NMR HMBC and HMQC experiments. In addition, the absolute stereochemistry of the isolated compounds 1 and 2 was revised as C-(3 S) based on Circular Dichroism experiments. This appears to be the first report of amorphaquinone (1) and pendulone (2) from the genus Abrus.
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Affiliation(s)
- Aziz A. Rahman
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Volodymyr Samoylenko
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Surendra K. Jain
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Babu L. Tekwani
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Shabana I. Khan
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Melissa R. Jacob
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Jacob O. Midiwo
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - John P. Hester
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Larry A. Walker
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
| | - Ilias Muhammad
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Mississippi 38677, USA
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12
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Machumi F, Samoylenko V, Yenesew A, Derese S, Midiwo JO, Wiggers FT, Jacob MR, Tekwani BL, Khan SI, Walker LA, Muhammad I. Antimicrobial and Antiparasitic Abietane Diterpenoids from the Roots of Clerodendrum eriophyllum. Nat Prod Commun 2010. [DOI: 10.1177/1934578x1000500605] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Chromatographic separation of the roots of a Kenyan medicinal plant, Clerodendrum eriophyllum, led to the isolation of ten abietane diterpenoids (1-10), one of which (1) was isolated for the first time from a natural source. Using spectroscopic data, the structure of 1 was determined to be 12-hydroxy-8,12-abietadiene-3,11,14-trione. Circular dichroism (CD) spectra showed that the stereochemistry of compounds 1, 3, and 6-8 belongs to the normal series of abietane diterpenes, which confirmed the absolute stereochemistry of the isolated compounds. Compounds 1-10 were evaluated for their in vitro antiplasmodial, antileishmanial, antifungal and antibacterial activities. Compounds 3 and 7 exhibited potent antifungal activity (IC50/MIC 0.58/1.25 and 0.96/2.5 μg/mL, respectively) against C. neoformans, whereas 3, 6 and 7 showed strong antibacterial activity against Staphylococcus aureus and methicillin-resistant S. aureus with IC50/MIC values between 1.33-1.75/2.5-5 and 0.96-1.56/2.5 μg/mL, respectively. In addition, compounds 3 and 9 exhibited potent antileishmanial activity (IC50 0.08 and 0.20 μg/mL, respectively) against L. donovani, while 3 and 7 displayed weak antimalarial activity against Plasmodium falciparum, but 9 was inactive.
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Affiliation(s)
- Francis Machumi
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Volodymyr Samoylenko
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Abiy Yenesew
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Solomon Derese
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Jacob O. Midiwo
- Department of Chemistry, University of Nairobi, P.O. Box 30197 (00100), Nairobi, Kenya
| | - Frank T. Wiggers
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Melissa R. Jacob
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Babu L. Tekwani
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Shabana I. Khan
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Larry A. Walker
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
- Department of Pharmacology, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
| | - Ilias Muhammad
- National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA
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