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Anbessa B, Lulekal E, Hymete A, Debella A, Debebe E, Abebe A, Degu S. Ethnomedicine, antibacterial activity, antioxidant potential and phytochemical screening of selected medicinal plants in Dibatie district, Metekel zone, western Ethiopia. BMC Complement Med Ther 2024; 24:199. [PMID: 38773522 PMCID: PMC11110246 DOI: 10.1186/s12906-024-04499-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 05/10/2024] [Indexed: 05/24/2024] Open
Abstract
BACKGROUND Medicinal plants play a major role in the delivery of healthcare, particularly among the rural population of Ethiopia. Plant extracts and their bioactive compounds have been utilized for the treatment of several diseases. This study was aimed at evaluating the antibacterial activity, antioxidant capacity, and phytochemical content of selected medicinal plants used in Dibatie district, western Ethiopia. METHODS Study plants were collected, shade dried, pulverized, extracted by maceration in 80% ethanol, and subjected to antibacterial, antioxidant, and phytochemical tests. Minimum inhibitory concentration (MIC) was determined using 96-well microplates and nutrient broth microdilution. Antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. Phytochemical screening was conducted using standard test methods. RESULTS The ethanolic extract of Polystachya steudneri Rchb.f. pseudobulbs was the most active against gram-negative Proteus mirabilis, Salmonella typhimurium, Klebsiella pneumoniae, Escherichia coli, and Shigella flexneri, with MIC values of 8 ± 0, 11 ± 5, 3 ± 1, 3 ± 1, and 2 ± 0 mg/mL, respectively. The ethanolic extract of P. steudneri was also the most effective against gram-positive Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus agalactiae, and Enterococcus faecalis, with MIC values of 8 ± 0, 8 ± 0, 3 ± 1, and 16 ± 0 mg/mL, respectively. Ethanolic extracts of Gnidia involucrata Steud. ex A.Rich. stems and roots were effective antioxidants, with respective 50% DPPH free radical inhibitory concentrations (IC50) of 168.68 and 181.79 µg/mL, followed by that of P. steudneri (IC50 = 203.11 µg/mL). The study plants contained alkaloids, anthocyanins, anthraquinones, cardiac glycosides, coumarins, flavonoids, phenols, saponins, steroids, tannins, and terpenoids. CONCLUSIONS This study confirmed the antibiotic, antioxidant, and phytochemical constituents of the investigated plants and suggested further investigations that may lead to bioactive lead compounds.
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Affiliation(s)
- Baressa Anbessa
- Department of Plant Biology and Biodiversity Management, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
- Department of Biology, College of Natural and Computational Sciences, Bule Hora University, Bule Hora, Ethiopia.
| | - Ermias Lulekal
- Department of Plant Biology and Biodiversity Management, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Ariaya Hymete
- Department of Pharmaceutical Chemistry and Pharmacognosy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Asfaw Debella
- Directorate of Modern and Traditional Medicine Research, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Eyob Debebe
- Traditional and Modern Medicine Research and Development Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Abiy Abebe
- Traditional and Modern Medicine Research and Development Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Sileshi Degu
- Traditional and Modern Medicine Research and Development Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
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Nigussie G, Siyadatpanah A, Norouzi R, Debebe E, Alemayehu M, Dekebo A. Antioxidant Potential of Ethiopian Medicinal Plants and Their Phytochemicals: A Review of Pharmacological Evaluation. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2023; 2023:1901529. [PMID: 37868204 PMCID: PMC10586904 DOI: 10.1155/2023/1901529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 07/11/2023] [Accepted: 09/19/2023] [Indexed: 10/24/2023]
Abstract
Background Free radicals are very reactive molecules produced during oxidation events that in turn initiate a chain reaction resulting in cellular damage. Many degenerative diseases in humans, including cancer and central nervous system damage, are caused by free radicals. Scientific evidence indicates that active compounds from natural products can protect cells from free radical damage. As a result, the aim of this review is to provide evidence of the use of diverse Ethiopian medicinal plants with antioxidant properties that have been scientifically validated in order to draw attention and foster further investigations in this area. Methods The keywords antioxidant, radical scavenging activities, reactive oxygen species, natural product, Ethiopian Medicinal plants, and 2, 2-Diphenyl-1-picrylhydrazyl radical scavenging assay (DPPH) were used to identify relevant data in the major electronic scientific databases, including Google Scholar, ScienceDirect, PubMed, Medline, and Science domain. All articles with descriptions that were accessed until November 2022 were included in the search strategy. Results A total of 54 plant species from 33 families were identified, along with 46 compounds isolated. More scientific studies have been conducted on plant species from the Brassicaceae (19%), Asphodelaceae (12%), and Asteraceae (12%) families. The most used solvent and extraction method for plant samples are methanol (68%) and maceration (88%). The most examined plant parts were the leaves (42%). Plant extracts (56%) as well as isolated compounds (61%) exhibited significant antioxidant potential. The most effective plant extracts from Ethiopian flora were Bersama abyssinica, Solanecio gigas, Echinops kebericho, Verbascum sinaiticum, Apium leptophyllum, and Crinum abyssinicum. The best oxidative phytochemicals were Rutin (7), Flavan-3-ol-7-O-glucoside (8), Myricitrin (13), Myricetin-3-O-arabinopyranoside (14), 7-O-Methylaloeresin A (15), 3-Hydroxyisoagatholactone (17), β-Sitosterol-3-O-β-D-glucoside (22), Microdontin A/B (24), and Caffeic acid (39). Conclusion Many crude extracts and compounds exhibited significant antioxidant activity, making them excellent candidates for the development of novel drugs. However, there is a paucity of research into the mechanisms of action as well as clinical evidence supporting some of these isolated compounds. To fully authenticate and then commercialize, further investigation and systematic analysis of these antioxidant-rich species are required.
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Affiliation(s)
- Gashaw Nigussie
- Armauer Hansen Research Institute, P.O. Box: 1005, Addis Ababa, Ethiopia
- Department of Applied Chemistry, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | - Abolghasem Siyadatpanah
- Department of Medical Microbiology, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Roghayeh Norouzi
- Department of Pathobiology, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Eyob Debebe
- Armauer Hansen Research Institute, P.O. Box: 1005, Addis Ababa, Ethiopia
- Department of Applied Chemistry, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | | | - Aman Dekebo
- Department of Applied Chemistry, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
- Institute of Pharmaceutical Sciences, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
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Kamau RW, Masila VM, Midiwo JO, Mgani QA, Kumarihamy M, Wang M, Zhao J, Muhammad I. A new gnidiflavanone-flavonol dimer and other constituents from Gnidia apiculata. Nat Prod Res 2023; 37:3199-3206. [PMID: 35392742 DOI: 10.1080/14786419.2022.2062349] [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: 09/03/2021] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 10/18/2022]
Abstract
A new 3,8''-flavanone-flavonol dimer gnidiflavanone-flavonol (1) and 10 known compounds (2-11), including four rare primula-type flavones 2-5, were isolated from the roots of Gnidia apiculata. Compounds 2-5 and 7 were reported for the first time from the plant family Thymelaeceae. Structures of the isolated compounds were established by spectroscopic data, including 1D and 2D NMR (COSY, HMBC, HSQC and ROESY) and mass spectrometry, as well as by the comparison with literature data. The crude roots extract and isolated compounds were evaluated for antimicrobial and antiplasmodial activities. Among isolated compounds, 6-hydroxyflavone (4) and 6-O-acetylflavone (4a) showed antiplasmodial activity against chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum.
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Affiliation(s)
- Rahab W Kamau
- Department of Chemistry, School of Natural and Applied Sciences, Masinde Muliro University of Science and Technology, Kakamega, Kenya
- Department of Chemistry, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Veronica M Masila
- Department of Chemistry, School of Physical Sciences, University of Nairobi, Nairobi, Kenya
| | - Jacob O Midiwo
- Department of Chemistry, School of Physical Sciences, University of Nairobi, Nairobi, Kenya
| | - Quintino A Mgani
- Department of Chemistry, College of Natural and Applied Sciences, University of Dar es Salaam, Dar es Salaam, Tanzania
| | - Mallika Kumarihamy
- National Centre for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Mei Wang
- Natural Products Utilization Research Unit, Agricultural Research Service, U.S. Department of Agriculture, University, MS, USA
| | - Jianping Zhao
- National Centre for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Ilias Muhammad
- National Centre for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS, USA
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Gashaye MB, Birhan YS. Phytochemical constituents, antioxidant and antibacterial activities of Plectocephalus varians (A. Rich.) C. Jeffrey ex Cufod root extracts. BMC Complement Med Ther 2023; 23:135. [PMID: 37118732 PMCID: PMC10148559 DOI: 10.1186/s12906-023-03919-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 03/13/2023] [Indexed: 04/30/2023] Open
Abstract
Plants have been used to treat diverse types of diseases in different cultural groups around the globe. In this regard, the root of Plectocephalus varians (P. varians) is claimed to have a beneficiary effect in treating cancer and hemorrhoids in Ethiopia. Hence, this study aimed at the phytochemical investigation, antioxidant, and antibacterial activities of n-hexane, acetone, and methanolic extracts of P. varians root. The different crude extracts of P. varians were obtained through maceration technique. The total phenolic content (TPC) and total flavonoid contents (TFC) of the extracts were estimated using Folin-Ciocalteu Reagent (FCR) and aluminum chloride colorimetric assays, respectively. The antioxidant activities of the extracts were determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging and ferric reducing antioxidant power (FRAP) assays. The antibacterial activities of the extracts were assessed by using disc diffusion method. The results echoed the presence of alkaloids, saponins, flavonoids, steroids, phenols, tannins, anthraquinones, terpenoids, polyphenols, and glycosides in the root of P. varians. The methanolic root extract (MRE) had the highest TPC (107.18 mg GAE/g) and TFC (120.194 mg QE/g) followed by acetone root extract (ARE) (TPC = 98.68 mg GAE/g; TFC = 64.038 mg QE/g) and n-hexane root extract (HRE) (TPC = 12.39 mg GAE/g; TFC = 9.917 mg QE/g). The DPPH radical scavenging and FRAP assays demonstrated the antioxidant effects of HRE (IC50 = 681.75 ppm; EC50 = 60.65 ppm), ARE (IC50 = 165.73 ppm; EC50 = 51.67 ppm) and MRE (IC50 = 132.06 ppm; EC50 = 30.97 ppm) of P. varians. Furthermore, the root fractions elicited pronounced dose-dependent growth inhibition against Staphylococcus aureus, Streptococci pyogenes, Escherichia coli, and Klebsiella pneumoniae with mean zone of inhibition (MZI) ranging from 11 ± 0.38 to 20 ± 0.04 mm at 800 ppm. Overall, the present study provides ethnopharmacological evidence suggesting the medicinal importance of P. varians. The results also call for further bioassay-guided phytochemical screening and in vitro and/or in vivo bioactivity testing.
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Affiliation(s)
- Melaku Birhane Gashaye
- Department of Chemistry, Natural and Computational Sciences College, Debre Markos University, P.O. Box 269, Debre Markos, Ethiopia
| | - Yihenew Simegniew Birhan
- Department of Chemistry, Natural and Computational Sciences College, Debre Markos University, P.O. Box 269, Debre Markos, Ethiopia.
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Aliye M, Dekebo A, Tesso H, Abdo T, Eswaramoorthy R, Melaku Y. Molecular docking analysis and evaluation of the antibacterial and antioxidant activities of the constituents of Ocimum cufodontii. Sci Rep 2021; 11:10101. [PMID: 33980935 PMCID: PMC8115310 DOI: 10.1038/s41598-021-89557-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 04/26/2021] [Indexed: 11/25/2022] Open
Abstract
Ocimum cufodontii ((Lanza) A.J.Paton) has been traditionally used in Ethiopia against bacteria. The extracts of the leaves and roots of O. cufodontii after silica gel column chromatography furnished compounds 1–5, compounds 3 and 4 are new natural products. The oil from the hydro-distillation of the leaves, after analyzed with GC–MS, has led to the identification of β-caryophyllene as a principal component, suggesting the essential oil as medicine and spices to enhance the taste of food. The constituents of O. cufodontii were assessed for their antibacterial activity against E. coli, K. pneumonia, S. typhymurium and S. aureus. The best activity was displayed against S. aureus by the hexane extract of the roots, compound 4, and the essential oil with an inhibition zone of 17, 15, and 19 mm, respectively. Molecular docking analysis revealed that compound 1 has better docking efficiency and forms hydrophobic interactions with five amino acids (ARG192, PHE196, GLU185, GLU193, and LYS189). This suggests that the compounds may act as potential inhibitors of DNA gyrase. The constituents were also assessed for their antioxidant activities using DPPH, ferric thicyanate and ferric reducing power assay. The hexane extracts of the roots inhibited the DPPH radical and peroxide formation by 90.5 and 83%, respectively, suggesting the potential of the extract as an antioxidant. Furthermore, the hexane extract of the roots of O. cufodontii exhibited the maximum reducing power compared with the EtOAc and methanol extracts. Hence, the activity displayed herein indicated as the plant has great potential as a remedy for diseases caused by bacteria and radicals.
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Affiliation(s)
- Muhdin Aliye
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia
| | - Aman Dekebo
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia
| | - Hailemichael Tesso
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia
| | - Teshome Abdo
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia
| | - Rajalakshmanan Eswaramoorthy
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia
| | - Yadessa Melaku
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O.Box 1888, Adama, Ethiopia.
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Briones-Claudett KH, Briones-Claudett MH, Andrade Cabrera C, Briones Zamora KH, Briones Márquez DC, Benítes Solís J, Grunauer M. Mendelson's Syndrome: Chemical Pneumonitis After Pesticide Intake. AMERICAN JOURNAL OF CASE REPORTS 2020; 21:e923776. [PMID: 32827430 PMCID: PMC7469903 DOI: 10.12659/ajcr.923776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Patient: Female, 15-year-old Final Diagnosis: Chemical pneumonitis • Mendelson’s syndrome Symptoms: Emesis • hypoxemia Medication: — Clinical Procedure: Bronchoalveolar lavage Specialty: Critical Care Medicine • General and Internal Medicine
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Affiliation(s)
- Killen H Briones-Claudett
- Faculty of Medical Sciences, University of Guayaquil, Guayaquil, Ecuador.,Physiology and Respiratory Center Briones-Claudett, Guayaquil, Ecuador.,Intensive Care Unit, Ecuadorian Institute of Social Security (IESS), Babahoyo, Ecuador
| | - Mónica H Briones-Claudett
- Physiology and Respiratory Center Briones-Claudett, Guayaquil, Ecuador.,Intensive Care Unit, Ecuadorian Institute of Social Security (IESS), Babahoyo, CA, Ecuador
| | - Cesar Andrade Cabrera
- Intensive Care Unit, Ecuadorian Institute of Social Security (IESS), Babahoyo, Ecuador
| | - Killen H Briones Zamora
- Physiology and Respiratory Center Briones-Claudett, Guayaquil, Ecuador.,Faculty of Medical Sciences, Universidad Espíritu Santo, Samborondón, Ecuador
| | - Diana C Briones Márquez
- Faculty of Medical Sciences, University of Guayaquil, Guayaquil, Ecuador.,Physiology and Respiratory Center Briones-Claudett, Guayaquil, Ecuador
| | | | - Michelle Grunauer
- School of Medicine, Universidad San Francisco de Quito, Quito, Ecuador.,Critical Care Unit, Hospital de los Valles, Quito, Ecuador
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