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Belayneh Asfaw T, Getachew Tadesse M, Beshah Tessema F, Woldemichael Woldemariam H, V. Chinchkar A, Singh A, Upadhyay A, Mehari B. Ultrasonic-assisted extraction and UHPLC determination of ascorbic acid, polyphenols, and half-maximum effective concentration in Citrus medica and Ziziphus spina-christi fruits using multivariate experimental design. Food Chem X 2024; 22:101310. [PMID: 38645936 PMCID: PMC11031790 DOI: 10.1016/j.fochx.2024.101310] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 03/08/2024] [Accepted: 03/17/2024] [Indexed: 04/23/2024] Open
Abstract
This study aimed to determine the concentrations of ascorbic acid and polyphenols in fruits and peels of Citrus medica and Ziziphus spina-christi grown in Ethiopia. Conditions of ultrasound-assisted extraction (UAE) and ultra-high-performance liquid chromatography coupled with a diode array detector (HPLC-DAD) were optimized, using a multivariate experimental design. The optimum conditions of UAE were 15 min extraction time at 35 ℃, with 75 % aqueous methanol as solvent, and a fruit powder-to-solvent ratio (m/v) of 1:15. Among the different drying conditions investigated, freeze-drying was found to be appropriate for analyzing ascorbic acid, polyphenols, and antioxidant potential. The overall ranges, across the fruits and peels, of ascorbic acid, total polyphenols, and antioxidant potentials (EC50) obtained were 8.7 ± 1.4-91.2 ± 2.6 mg/100 g, 253.0 ± 6.3-764.1 ± 25.8 mg GAE/100 g and 2.4 ± 0.1-26.1 ± 2.9 mg/mL, respectively. This indicates that the fruits and peels of the studied plants are advantageous as sources of ascorbic acid and polyphenols.
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Affiliation(s)
- Tilahun Belayneh Asfaw
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O.Box 196, Gondar, Ethiopia
| | - Mesfin Getachew Tadesse
- Department of Industrial Chemistry, College of Applied Sciences, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
| | - Fekade Beshah Tessema
- Department of Chemistry, College of Natural and Computational Sciences, Woldia University, Woldia, Ethiopia
| | - Henock Woldemichael Woldemariam
- Department of Chemical Engineering, College of Engineering, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
| | - Ajay V. Chinchkar
- National Institute of Food Technology Entrepreneurship and Management, Department of Food Science and Technology, Haryana, India
| | - Anurag Singh
- National Institute of Food Technology Entrepreneurship and Management, Department of Food Science and Technology, Haryana, India
- Department of Food Technology, Harcourt Butler Technical University, Nawabganj, Kanpur, Uttar Pradesh 208002, India
| | - Ashutosh Upadhyay
- National Institute of Food Technology Entrepreneurship and Management, Department of Food Science and Technology, Haryana, India
| | - Bewketu Mehari
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O.Box 196, Gondar, Ethiopia
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Tessema FB, Gonfa YH, Asfaw TB, Tadesse MG, Bachheti RK. In silico Molecular Docking Approach to Identify Potential Antihypertensive Compounds from Ajuga integrifolia Buch.-Ham. Ex D. Don (Armagusa). Adv Appl Bioinform Chem 2024; 17:47-59. [PMID: 38495362 PMCID: PMC10942012 DOI: 10.2147/aabc.s392878] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/29/2024] [Indexed: 03/19/2024] Open
Abstract
Background Ajuga integrifolia (Armagusa) is used as a decoction to treat high blood pressure and diabetes, widely in Ethiopia. Specific compounds for anti-hypertension activity were not identified so far. This study aims to provide a scientific basis for the therapeutic use of A. integrifolia as an antihypertension agent. Methods In silico studies were used to evaluate the antihypertensive components of A. integrifolia. Flavonoids identified using HPLC analysis and iridoid glycosides isolated from A. integrifolia in this study and those isolated from synonyms (A. remota and A. bractosa) were considered in the molecular docking study. Interactions were studied by using Autodock vina (1.2) on PyRx 0.8 and visualizing in 2D and 3D using ligPlot+ and Discovery studio software. Activities like vasoprotection and druglikeness properties were predicted using online servers. Results Flavonoids such as quercetin, myricetin, and rutin were identified and quantified by HPLC analysis from different extracts of A. integrifolia. Reptoside and 8-O-acetylharpgide isolated from the aerial part of A. integrifolia. The binding energies of all 17 candidates considered in this study range from -10.2 kcal/mol to -7.5 kcal/mol and are lower than enalapril (reference drug: -5.9 kcal/mol). The binding energies, in most case, constitute hydrogen bonding. Biological activity predicted using PASS test also showed that the flavonoids have more probability of activity than the iridoid glycosides. Druglikeness properties of the candidate molecules showed that most follow the Lipinski rule of five with few violations. Conclusion Lower binding energies involving hydrogen bonding and predicted activities concerning hypertension confirm the traditional use of the aerial part of the medicinal plant concerned. Flavonoids: rutin, myricetin, quercetin, and kaempferol take the leading role in the antihypertensive activity of the aerial part of A. integrifolia. The iridoid glycosides studied are almost similar in their effect on their antihypertensive activity and still better than the reference drug.
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Affiliation(s)
- Fekade Beshah Tessema
- Department of Chemistry, College of Natural and Computational Science, Woldia University, Woldia, Ethiopia
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
| | - Yilma Hunde Gonfa
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
- Department of Chemistry, College of Natural and Computational Science, Ambo University, Ambo, Ethiopia
| | - Tilahun Belayneh Asfaw
- Department of Chemistry, College of Natural and Computational Science, Gondar University, Gondar, Ethiopia
| | - Mesfin Getachew Tadesse
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
- Centre of Excellence in Biotechnology and Bioprocess, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
| | - Rakesh Kumar Bachheti
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
- Department of Allied Sciences, Graphic Era Hill University, Society Area, Clement Town, Dehradun, 248002, India
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Asfaw TB, Woldemariam HW, Tadesse MG, Tessema FB, Admassie ZG, Esho TB. Method optimization for the determinations of selected phytochemicals and antioxidant activities of wild Ethiopian Syzygium guineense fruit and seed under different drying conditions. Heliyon 2023; 9:e16227. [PMID: 37274648 PMCID: PMC10238900 DOI: 10.1016/j.heliyon.2023.e16227] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/19/2023] [Accepted: 05/11/2023] [Indexed: 06/06/2023] Open
Abstract
This study aimed to optimize the ultrasound-assisted extraction (UAE) parameters using response surface methodology (RSM) for the determination of ascorbic acid (AA), antioxidant activities/the half maximal effective concentration (EC50), total phenolic contents (TPC), and total flavonoid content (TFC) of Ethiopian wild Syzygium guineense fruit and seed processed under different drying conditions. The optimizations of the UAE methods for the determination of AA, antioxidant activities (EC50 values), TPC, and TFC were evaluated using response surface methodology (RSM). The extraction time of 15 min, the temperature of 35 °C, extraction solvent composition (methanol:water) of 75 to 25%, and solid-to-solvent ratios of 1:15 w/v were the optimum independent parameters. The experimental and the predicted data of TPC, EC50, and AA were in good agreement with the overall error below 0.01%. It also indicated a hypothesized distribution of predicted data fitted with experimental data. The average TPC, EC50, and AA content in S. guineense fruits and the seed varied from 581.25 ± 37.13 to 1917.40 ± 26.15 mg GAE/100 g, 4.02 ± 0.42 to 155.73 ± 5.11 mg/100 g, and 1.96 ± 0.02 to 0.94 ± 0.00 mg/mL, respectively. This study indicated that this underutilized wild fruit and its seeds can be an alternative source of AA and antioxidant compounds.
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Affiliation(s)
- Tilahun Belayneh Asfaw
- Department of Industrial Chemistry, College of Applied Sciences, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, Gondar, Ethiopia
| | - Henock Woldemichael Woldemariam
- Department of Chemical Engineering, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
| | - Mesfin Getachew Tadesse
- Department of Industrial Chemistry, College of Applied Sciences, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
| | - Fekade Beshah Tessema
- Department of Industrial Chemistry, College of Applied Sciences, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Department of Chemistry, Natural and Computational Sciences Faculty, Woldia University, Woldia, Ethiopia
| | | | - Tarekegn Berhanu Esho
- Department of Industrial Chemistry, College of Applied Sciences, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
- Center of Excellence for Biotechnology and Bioprocess, Addis Ababa Science and Technology University, P.O.Box 16417, Addis Ababa, Ethiopia
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Tessema FB, Gonfa YH, Asfaw TB, Tadesse MG, Bachheti RK. Antioxidant Activity of Flavonoids and Phenolic Acids from Dodonaea angustifolia Flower: HPLC Profile and PASS Prediction. J CHEM-NY 2023. [DOI: 10.1155/2023/8315711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Background. Dodonaea angustifolia is a known medicinal plant across East Arica. The flower of D. angustifolia is not well investigated in terms of phytochemistry and biological activities. This study aims to investigate the presence of flavonoids and phenolic acids in the flower of D. angustifolia and its antioxidant activity. Methods. Preliminary phytochemical screening was carried out using the standard protocols. Antioxidant activity evaluation using DPPH assay and total phenol content (TPC) and total flavonoid content (TFC) determinations in the flower extract were compared with the values of the leaf extract. UHPLC-DAD analysis was managed to develop the profile of the flower extract. Prediction of biological activity spectra for substances (PASS) was done using an online server for antioxidant and related activities. Results. Preliminary phytochemical screening and TPC and TFC values confirmed the presence of flavonoids and phenolic acids. From the HPLC analysis of flavonoids, quercetin, myricetin, rutin, and phenolic acids such as chlorogenic acid, gallic acid, and syringic acid were detected and quantified. The biological activity spectrum was predicted for the detected and quantified polyphenols. Conclusions. D. angustifolia flower is a rich source of flavonoids and phenolic acids, which are extractable and can be checked for further biological activity. It was possible to identify and quantify phenolic compounds through HPLC analysis in the methanol extract of D. angustifolia flower. The PASS biological activity prediction results showed that there were stronger antioxidant activities for the identified flavonoids. Future work will emphasize the isolation and characterization of active principles responsible for bioactivity.
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Tessema FB, Gonfa YH, Asfaw TB, Tadesse MG, Tadesse TG, Bachheti A, Alshaharni MO, Kumar P, Kumar V, Širić I, Abou Fayssal S, Chaubey KK, Bachheti RK. Targeted HPTLC Profile, Quantification of Flavonoids and Phenolic Acids, and Antimicrobial Activity of Dodonaea angustifolia (L.f.) Leaves and Flowers. Molecules 2023; 28:molecules28062870. [PMID: 36985842 PMCID: PMC10052987 DOI: 10.3390/molecules28062870] [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: 03/01/2023] [Revised: 03/12/2023] [Accepted: 03/15/2023] [Indexed: 03/30/2023] Open
Abstract
In East Africa, Dodonaea angustifolia (L.f.) is a well-known medicinal herb. Its leaf is primarily studied in light of its ethnobotanical use. In terms of phytochemistry and biological activity, its flower is not studied. In a prior study, our team looked into phytochemical screening, antioxidant activity, and total phenolic levels. This study aims to compare the profiles and biological activities of the leaf and flower samples of D. angustifolia and to present therapeutic alternatives. The leaf and flower sample powders were extracted with methanol using ultrasound-assisted extraction (UAE). HPTLC profile was obtained using CAMAG-HPTLC equipped with VisionCATS software. Antimicrobial agar well diffusion assay and minimum inhibition concentration (MIC) were determined. The leaf and flower extracts of D. angustifolia showed antibacterial activity with a MIC value of 20 µg/mL against Enterococcus faecalis and Listeria monocytogenes. Similarly, 40 µg/mL was found to be effective against Aspergillus flavus. D. angustifolia flower is a rich source of flavonoids and phenolic acids. Because of its antibacterial properties and profile, which are almost the same, the flower is emerging as a viable option for medicinal alternatives.
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Affiliation(s)
- Fekade Beshah Tessema
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Centre of Excellence in Biotechnology and Bioprocess, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Department of Chemistry, Faculty of Natural and Computational Science, Woldia University, Woldia P.O. Box. 400, Ethiopia
| | - Yilma Hunde Gonfa
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Centre of Excellence in Biotechnology and Bioprocess, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Department of Chemistry, Faculty of Natural and Computational Science, Ambo University, Ambo P.O. Box 19, Ethiopia
| | - Tilahun Belayneh Asfaw
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Department of Chemistry, College of Natural and Computational Science, Gondar University, Gondar P.O. Box 196, Ethiopia
| | - Mesfin Getachew Tadesse
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Centre of Excellence in Biotechnology and Bioprocess, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
| | - Tigist Getachew Tadesse
- Bio and Emerging Technology Institute, Health Biotechnology Directorate, Addis Ababa P.O. Box 5954, Ethiopia
| | - Archana Bachheti
- Department of Environment Science, Graphic Era (Deemed to be University), Dehradun 248002, India
| | - Mohammed O Alshaharni
- Department of Biology, College of Science, King Khalid University, Abha 61321, Saudi Arabia
| | - Pankaj Kumar
- Agro-Ecology and Pollution Research Laboratory, Department of Zoology and Environmental Science, Gurukula Kangri (Deemed to Be University), Haridwar 249404, India
| | - Vinod Kumar
- Agro-Ecology and Pollution Research Laboratory, Department of Zoology and Environmental Science, Gurukula Kangri (Deemed to Be University), Haridwar 249404, India
| | - Ivan Širić
- University of Zagreb, Faculty of Agriculture, Svetosimunska 25, 10000 Zagreb, Croatia
| | - Sami Abou Fayssal
- Department of Agronomy, Faculty of Agronomy, University of Forestry, 10 Kliment Ohridski Blvd, 1797 Sofia, Bulgaria
- Department of Plant Production, Faculty of Agriculture, Lebanese University, Beirut 1302, Lebanon
| | - Kundan Kumar Chaubey
- Division of Research and Innovation, School of Applied and Life Sciences, Uttaranchal University, Arcadia Grant, P.O. Chandanwari, Prem Nagar, Dehradun 248007, India
| | - Rakesh Kumar Bachheti
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Centre of Excellence in Biotechnology and Bioprocess, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
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Tessema FB, Gonfa YH, Asfaw TB, Tadesse TG, Tadesse MG, Bachheti A, Pandey DP, Wabaidur SM, Dahlous KA, Širić I, Kumar P, Kumar V, Abou Fayssal S, Bachheti RK. Flavonoids and Phenolic Acids from Aerial Part of Ajuga integrifolia (Buch.-Ham. Ex D. Don): Anti-Shigellosis Activity and In Silico Molecular Docking Studies. Molecules 2023; 28:molecules28031111. [PMID: 36770779 PMCID: PMC9920895 DOI: 10.3390/molecules28031111] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/11/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
Shigellosis is one of the major causes of death in children worldwide. Flavonoids and phenolic acids are expected to demonstrate anti-shigellosis activity and anti-diarrheal properties. The aerial part of A. integrifolia is commonly used against diarrhea. This study aimed to identify flavonoids and phenolic acids responsible for this therapeutic purpose. Antioxidant activity, total phenol content, and total flavonoid content were determined. The antibacterial activity of the aerial part against Shigella spp. was also tested using the agar well diffusion method. HPLC analysis was performed using UHPLC-DAD for different extracts of the aerial part. Autodock Vina in the PyRx platform was used to screen responsible components. Ciprofloxacin was used as a reference drug. An enzyme taking part in pyrimidine biosynthesis was used as a target protein. Molecular docking results were visualized using Discovery Studio and LigPlot1.4.5 software. Antioxidant activity, total phenol content, and total flavonoid content are more significant for the aerial part of A. integrifolia. From HPLC analysis, the presence of the flavonoids, quercetin, myricetin, and rutin and the phenolic acids gallic acid, chlorogenic acid, and syringic acid were identified from the aerial part of A. integrifolia. Regarding the antibacterial activity, the aerial part shows considerable activity against Shigella spp. Binding energies, RMSD and Ki values, interaction type, and distance are considered to identify the components most likely responsible for the therapeutic effects and observed activity. Antioxidant activity, total phenol content, and total flavonoid content of the aerial part are in line with anti-shigellosis activity. The top five components that are most likely potentially responsible for therapeutic purposes and anti-shigellosis activity are chlorogenic acid, rutin, dihydroquercetin, dihydromyricetin, and kaempferol.
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Affiliation(s)
- Fekade Beshah Tessema
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
- Department of Chemistry, Faculty of Natural and Computational Science, Woldia University, Woldia 400, Ethiopia
| | - Yilma Hunde Gonfa
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
- Department of Chemistry, Faculty of Natural and Computational Science, Ambo University, Ambo 19, Ethiopia
| | - Tilahun Belayneh Asfaw
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
- Department of Chemistry, College of Natural and Computational Science, Gondar University, Gondar 196, Ethiopia
| | - Tigist Getachew Tadesse
- Bio and Emerging Technology Institute, Health Biotechnology Directorate, Addis Ababa 5954, Ethiopia
| | - Mesfin Getachew Tadesse
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
| | - Archana Bachheti
- Department of Environment Science, Graphic Era (Deemed to be University), Dehradun 248002, India
| | - Devi Prasad Pandey
- Department of Chemistry, Govt Degree College Dehradun Shahar, Suddhowala, Dehradun 248007, India
| | - Saikh M. Wabaidur
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Kholood A. Dahlous
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ivan Širić
- University of Zagreb, Faculty of Agriculture, Svetosimunska 25, Zagreb 10000, Croatia
| | - Pankaj Kumar
- Agro-Ecology and Pollution Research Laboratory, Department of Zoology and Environmental Science, Gurukula Kangri (Deemed to be University), Haridwar 249404, India
| | - Vinod Kumar
- Agro-Ecology and Pollution Research Laboratory, Department of Zoology and Environmental Science, Gurukula Kangri (Deemed to be University), Haridwar 249404, India
| | - Sami Abou Fayssal
- Department of Agronomy, Faculty of Agronomy, University of Forestry, 10 Kliment Ohridski Blvd, 1797 Sofia, Bulgaria
- Department of Plant Production, Faculty of Agriculture, Lebanese University, Beirut 1302, Lebanon
| | - Rakesh Kumar Bachheti
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
- Centre of Excellence in Biotechnology and Bioprocess, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
- Correspondence:
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Akele ML, Desalegn SK, Asfaw TB, Assefa AG, Alemu AK, de Oliveira RR. Heavy metal contents in bovine tissues (kidney, liver and muscle) from Central Gondar Zone, Ethiopia. Heliyon 2022; 8:e12416. [PMID: 36590478 PMCID: PMC9801134 DOI: 10.1016/j.heliyon.2022.e12416] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/21/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
Environments prone to naturally non-biodegradable metal pollution have remained hot areas of research. Here, concentrations of Cu, Cr, Cd and Pb in 90 bovine tissue (kidney, liver and muscle) samples collected from Gondar City abattoir and Nara-Awudarda in Central Gondar Zone, Ethiopia, were investigated. The samples were dry-ashed at 550 °C for 3.45 h, mineralized with 2 mL conc. HNO3, and analysed using flame atomic absorption spectrometer. Pattern recognition methods, viz. principal component analysis (PCA) and partial least squares - discriminant analysis (PLS-DA), were employed to investigate heavy metal profiles in bovine tissues and classify them based on their geographic source. Results showed that the mean concentrations of the metals (mg/kg) extended in the range: 1.5-11.5 (Cu), 0.42-1.5 (Pb), BDL-1.05 (Cr) and BDL-0.41 (Cd). The concentrations of Cu and Cd, except Cd in muscle samples from Gondar City abattoir, were below the permissible limits while Pb and Cr, except for Pb in kidney and Cr in all samples at Gondar City abattoir, were above the permissible limits. Hence, it calls for enforceable food safety monitoring practices. PCA visualizes grouping of the studied bovine tissues based on the contents of analyzed metals where liver contained highest concentrations of the studied metals, except for Cd, which was highest in kidney. PLS-DA model clearly classified the tissue samples into two clusters depending on their geographic source. In general, the accumulation burden of heavy metals exhibited tissue-specific and sample source differences, probably due to varied organ functions and environmental conditions.
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Affiliation(s)
- Mulugeta Legesse Akele
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia,Corresponding author.
| | - Setegn Kassawmar Desalegn
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Tilahun Belayneh Asfaw
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Atnafu Guadie Assefa
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Addis Kokeb Alemu
- Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia
| | - Rodrigo Rocha de Oliveira
- Chemometrics Group, Department of Analytical Chemistry, University of Barcelona, Diagonal 645, 08028, Barcelona, Spain
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