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Bowen DR, Pathak S, Nadar RM, Parise RD, Ramesh S, Govindarajulu M, Moore A, Ren J, Moore T, Dhanasekaran M. Oxidative stress and COVID-19-associated neuronal dysfunction: mechanisms and therapeutic implications. Acta Biochim Biophys Sin (Shanghai) 2023; 55:1153-1167. [PMID: 37357527 PMCID: PMC10465323 DOI: 10.3724/abbs.2023085] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 02/09/2023] [Indexed: 06/27/2023] Open
Abstract
Severe acute respiratory syndrome (SARS)-CoV-2 virus causes novel coronavirus disease 2019 (COVID-19), and there is a possible role for oxidative stress in the pathophysiology of neurological diseases associated with COVID-19. Excessive oxidative stress could be responsible for the thrombosis and other neuronal dysfunctions observed in COVID-19. This review discusses the role of oxidative stress associated with SARS-CoV-2 and the mechanisms involved. Furthermore, the various therapeutics implicated in treating COVID-19 and the oxidative stress that contributes to the etiology and pathogenesis of COVID-19-induced neuronal dysfunction are discussed. Further mechanistic and clinical research to combat COVID-19 is warranted to understand the exact mechanisms, and its true clinical effects need to be investigated to minimize neurological complications from COVID-19.
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Affiliation(s)
- Dylan R. Bowen
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Suhrud Pathak
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Rishi M. Nadar
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Rachel D. Parise
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Sindhu Ramesh
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Manoj Govindarajulu
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Austin Moore
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
| | - Jun Ren
- Department of CardiologyZhongshan Hospital Fudan UniversityShanghai200032China
- Department of Laboratory Medicine and PathologyUniversity of WashingtonSeattleWA98195USA
| | - Timothy Moore
- Department of Drug Discovery and DevelopmentHarrison College of PharmacyAuburn UniversityAuburn-AL36849USA
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2
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Karaoğlu Ö, Serhatlı M, Pelvan E, Karadeniz B, Demirtas I, Çakırca G, Sipahix H, Özhan Y, Karapınar G, Charehsaz M, Aydın A, Yesilada E, Alasalvar C. Chewable tablet with herbal extracts and propolis arrests Wuhan and Omicron variants of SARS-CoV-2 virus. J Funct Foods 2023; 105:105544. [PMID: 37155488 PMCID: PMC10113600 DOI: 10.1016/j.jff.2023.105544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/23/2023] [Accepted: 04/14/2023] [Indexed: 05/10/2023] Open
Abstract
Prevention of COVID-19 is of paramount importance for public health. Some natural extracts might have the potential to suppress COVID-19 infection. Therefore, this study aimed to design a standardised, efficient, and safe chewable tablet formulation (with propolis and three herbal extracts) for possible prevention against two variants (Wuhan B.1.36 and Omicron BA.1.1) of SARS-CoV-2 virus and other viral infections. Green tea, bilberry, dried pomegranate peel, and propolis extracts were selected for this purpose. Cytotoxicity and antiviral activity of each component, as well as the developed chewable tablet, were examined against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) virus using Vero E6 cells with the xCELLigence real-time cell analyser-multiple plates system. Anti-inflammatory and analgesic activities, as well as mutagenicity and anti-mutagenicity of the chewable tablet were also analysed. Compared to the control, it was observed that the chewable tablet at concentrations of 110 and 55 µg/mL had antiviral activity rates of 101% and 81%, respectively, for the Wuhan variant and 112% and 35%, respectively, for the Omicron variant. The combination of herbal extracts with propolis extract were synergically more effective (∼7-fold higher) than that of individual extract. The present work suggests that a combination of herbal extracts with propolis at suitable concentrations can effectively be used as a food supplement for the prevention of both variants of the SARS-CoV-2 virus in the oral cavity (the first entry point of the SARS-CoV-2 virus).
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Affiliation(s)
- Öznur Karaoğlu
- Life Sciences, TÜBİTAK Marmara Research Center, Gebze-Kocaeli, Turkey
| | - Müge Serhatlı
- Life Sciences, TÜBİTAK Marmara Research Center, Gebze-Kocaeli, Turkey
| | - Ebru Pelvan
- Life Sciences, TÜBİTAK Marmara Research Center, Gebze-Kocaeli, Turkey
| | - Bülent Karadeniz
- Life Sciences, TÜBİTAK Marmara Research Center, Gebze-Kocaeli, Turkey
| | - Ilknur Demirtas
- Life Sciences, TÜBİTAK Marmara Research Center, Gebze-Kocaeli, Turkey
| | - Gamze Çakırca
- Life Sciences, TÜBİTAK Marmara Research Center, Gebze-Kocaeli, Turkey
- Department of Molecular Biology and Genetics, Faculty of Science, Gebze Technical University, Gebze-Kocaeli, Turkey
| | - Hande Sipahix
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir-İstanbul, Turkey
| | - Yağmur Özhan
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir-İstanbul, Turkey
| | - Gözdem Karapınar
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir-İstanbul, Turkey
| | - Mohammad Charehsaz
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir-İstanbul, Turkey
| | - Ahmet Aydın
- Department of Toxicology, Faculty of Pharmacy, Yeditepe University, Ataşehir-İstanbul, Turkey
| | - Erdem Yesilada
- Department of Pharmacognosy, Faculty of Pharmacy, Yeditepe University, Ataşehir-İstanbul, Turkey
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Harsha Haridas ES, Bhattacharya S, Varma MKR, Chandra GK. Bioinspired 5-caffeoylquinic acid capped silver nanoparticles using Coffee arabica leaf extract for high-sensitive cysteine detection. Sci Rep 2023; 13:8651. [PMID: 37244906 DOI: 10.1038/s41598-023-34944-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 05/10/2023] [Indexed: 05/29/2023] Open
Abstract
Selection of plant extracts as bioactive phytochemical source to synthesize nanoparticles is highly demanding due to the biocompatibility, nontoxicity, and cost-effectiveness over other available physical and chemical methods. Here, for the first time, Coffee arabica leaf extracts (CAE) were used to produce highly stable silver nanoparticles (AgNPs) and the corresponding bio reduction, capping and stabilization mechanism mediated by dominant isomer 5-caffeoylquinic acid (5-CQA) is discussed. UV-Vis, FTIR, μRaman spectroscopy, TEM, DLS and Zeta potential analyzer measurements were employed to characterize these green synthesized NPs. The affinity of 5-CQA capped CAE-AgNPs to thiol moiety of amino acid is utilized for the selective as well as sensitive detection of L-cysteine (L-Cys) to a low detection limit of 0.1 nM, as obtained from its μRaman spectra. Hence, the proposed novel, simple, eco-friendly, and economically sustainable method can provide a promising nanoplatform in the field of biosensors compliant with large-scale industrial production of AgNPs without aid of further instrumentation.
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Affiliation(s)
- E S Harsha Haridas
- Department of Physics, National Institute of Technology, Kozhikode, Kerala, 673601, India
| | | | - M K Ravi Varma
- Department of Physics, National Institute of Technology, Kozhikode, Kerala, 673601, India
| | - Goutam Kumar Chandra
- Department of Physics, National Institute of Technology, Kozhikode, Kerala, 673601, India.
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4
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Ghamry HI, Belal A, El-Ashrey MK, Tawfik HO, Alsantali RI, Obaidullah AJ, El-Mansi AA, Abdelrahman D. Evaluating the ability of some natural phenolic acids to target the main protease and AAK1 in SARS COV-2. Sci Rep 2023; 13:7357. [PMID: 37147518 PMCID: PMC10162004 DOI: 10.1038/s41598-023-34189-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 04/25/2023] [Indexed: 05/07/2023] Open
Abstract
Researchers are constantly searching for drugs to combat the coronavirus pandemic caused by SARS-CoV-2, which has lasted for over two years. Natural compounds such as phenolic acids are being tested against Mpro and AAK1, which are key players in the SARS-CoV-2 life cycle. This research work aims to study the ability of a panel of natural phenolic acids to inhibit the virus's multiplication directly through Mpro and indirectly by affecting the adaptor-associated protein kinase-1 (AAK1). Pharmacophore mapping, molecular docking, and dynamic studies were conducted over 50 ns and 100 ns on a panel of 39 natural phenolic acids. Rosmarinic acid (16) on the Mpro receptor (- 16.33 kcal/mol) and tannic acid (17) on the AAK1 receptor (- 17.15 kcal/mol) exhibited the best docking energy against both receptors. These favourable docking score values were found to be superior to those of the co-crystallized ligands. Preclinical and clinical research is required before using them simultaneously to halt the COVID-19 life cycle in a synergistic manner.
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Affiliation(s)
- Heba I Ghamry
- Nutrition and Food Sciences, Department of Home Economics, College of Home Economics, King Khalid University, P.O. Box 960, Abha, 61421, Saudi Arabia
| | - Amany Belal
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
| | - Mohamed Kandeel El-Ashrey
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr Elini St., Cairo, 11562, Egypt
- Medicinal Chemistry Department, Faculty of Pharmacy, King Salman International University, Ras-Sedr, South Sinai, Egypt
| | - Haytham O Tawfik
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Tanta University, Tanta, 31527, Egypt
| | - Reem I Alsantali
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Ahmad J Obaidullah
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Ahmed A El-Mansi
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Doaa Abdelrahman
- Department of Clinical Sciences, College of Medicine, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
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5
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Fam MS, Sedky CA, Turky NO, Breitinger HG, Breitinger U. Channel activity of SARS-CoV-2 viroporin ORF3a inhibited by adamantanes and phenolic plant metabolites. Sci Rep 2023; 13:5328. [PMID: 37005439 PMCID: PMC10067842 DOI: 10.1038/s41598-023-31764-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 03/16/2023] [Indexed: 04/04/2023] Open
Abstract
SARS-CoV-2 has been responsible for the major worldwide pandemic of COVID-19. Despite the enormous success of vaccination campaigns, virus infections are still prevalent and effective antiviral therapies are urgently needed. Viroporins are essential for virus replication and release, and are thus promising therapeutic targets. Here, we studied the expression and function of recombinant ORF3a viroporin of SARS-CoV-2 using a combination of cell viability assays and patch-clamp electrophysiology. ORF3a was expressed in HEK293 cells and transport to the plasma membrane verified by a dot blot assay. Incorporation of a membrane-directing signal peptide increased plasma membrane expression. Cell viability tests were carried out to measure cell damage associated with ORF3a activity, and voltage-clamp recordings verified its channel activity. The classical viroporin inhibitors amantadine and rimantadine inhibited ORF3a channels. A series of ten flavonoids and polyphenolics were studied. Kaempferol, quercetin, epigallocatechin gallate, nobiletin, resveratrol and curcumin were ORF3a inhibitors, with IC50 values ranging between 1 and 6 µM, while 6-gingerol, apigenin, naringenin and genistein were inactive. For flavonoids, inhibitory activity could be related to the pattern of OH groups on the chromone ring system. Thus, the ORF3a viroporin of SARS-CoV-2 may indeed be a promising target for antiviral drugs.
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Affiliation(s)
- Marina Sherif Fam
- Department of Biochemistry, German University in Cairo, Main Entrance of Al Tagamoa Al Khames, New Cairo, New Cairo, 11835, Egypt
| | - Christine Adel Sedky
- Department of Biochemistry, German University in Cairo, Main Entrance of Al Tagamoa Al Khames, New Cairo, New Cairo, 11835, Egypt
| | - Nancy Osama Turky
- Department of Biochemistry, German University in Cairo, Main Entrance of Al Tagamoa Al Khames, New Cairo, New Cairo, 11835, Egypt
| | - Hans-Georg Breitinger
- Department of Biochemistry, German University in Cairo, Main Entrance of Al Tagamoa Al Khames, New Cairo, New Cairo, 11835, Egypt
| | - Ulrike Breitinger
- Department of Biochemistry, German University in Cairo, Main Entrance of Al Tagamoa Al Khames, New Cairo, New Cairo, 11835, Egypt.
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Nouioura G, Tourabi M, El Ghouizi A, Kara M, Assouguem A, Saleh A, Kamaly OA, El Ouadrhiri F, Lyoussi B, Derwich EH. Optimization of a New Antioxidant Formulation Using a Simplex Lattice Mixture Design of Apium graveolens L., Coriandrum sativum L., and Petroselinum crispum M. Grown in Northern Morocco. PLANTS (BASEL, SWITZERLAND) 2023; 12:1175. [PMID: 36904035 PMCID: PMC10005385 DOI: 10.3390/plants12051175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
A statistical Simplex Lattice Mixture design was applied to develop a new formulation based on a combination of three plants grown in northern Morocco: Apium graveolens L., Coriandrum sativum L., and Petroselinum crispum M. We examined the extraction yield, total polyphenol content (TPC), 2'2-diphenyl-l-picrylhydrazyl (DPPH) radical scavenging activity, and total antioxidant capacity (TAC). The results of this screening study showed that C. sativum L. had the highest content of DPPH (53.22%) and TAC (37.46 ± 0.29 mg Eq AA/g DW) compared to the other two plants, while P. crispum M. showed the highest TPC (18.52 ± 0.32 mg Eq GA/g DW). Furthermore, the ANOVA analysis of the mixture design showed that all three responses (DPPH, TAC, and TPC) were statistically significant, with determination coefficients of 97%, 93%, and 91%, respectively, and fit the cubic model. Moreover, the diagnostic plots showed good correlation between the experimental and predicted values. Therefore, the best combination obtained under optimal conditions (P1 = 0.611, P2 = 0.289, P3 = 0.100) was characterized by DPPH, TAC, and TPC of 56.21%, 72.74 mg Eq AA/g DW, and 21.98 mg Eq GA/g DW, respectively. The results of this study reinforce the view of stimulating the effect of plant combinations to achieve better antioxidant activities, thus providing a better formulation using designs of mixtures for the food industry and in cosmetic and pharmaceutical applications. Moreover, our findings support the traditional use of the Apiaceae plant species in managing many disorders cited in the Moroccan pharmacopeia.
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Affiliation(s)
- Ghizlane Nouioura
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health and Quality of Life (SNAMOPEQ), Faculty of Sciences Dhar El-Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Meryem Tourabi
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health and Quality of Life (SNAMOPEQ), Faculty of Sciences Dhar El-Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Asmae El Ghouizi
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health and Quality of Life (SNAMOPEQ), Faculty of Sciences Dhar El-Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Mohammed Kara
- Laboratory of Biotechnology, Conservation and Valorisation of Natural Resources (LBCVNR), Department of Biology, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Amine Assouguem
- Laboratory of Functional Ecology and Environment, Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer Street, Fez 30000, Morocco
| | - Asmaa Saleh
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Omkulthom Al Kamaly
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Faiçal El Ouadrhiri
- Laboratory of Engineering, Molecular Organometallic Materials and Environment, Faculty of Sciences, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Badiaa Lyoussi
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health and Quality of Life (SNAMOPEQ), Faculty of Sciences Dhar El-Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - El Houssine Derwich
- Laboratory of Natural Substances, Pharmacology, Environment, Modeling, Health and Quality of Life (SNAMOPEQ), Faculty of Sciences Dhar El-Mehraz, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
- Unity of GC/MS and GC, City of Innovation, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
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Ramirez DA, Carazzone C. Small molecules putative structure elucidation in endemic Colombian fruits: CFM-ID approach. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2022. [DOI: 10.1080/10942912.2022.2147539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Daniel Arias Ramirez
- Chemistry, Department, Universidad de Los Andes, Laboratory of Advanced Analytical Techniques in Natural Products (LATNAP), Bogotá, Colombia
- ICP-MS Spectrometry Laboratory, Deanship of Scientific Research-Faculty of Science, Universidad de Los Andes, Bogotá, Colombia
| | - Chiara Carazzone
- Chemistry, Department, Universidad de Los Andes, Laboratory of Advanced Analytical Techniques in Natural Products (LATNAP), Bogotá, Colombia
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Proper Dietary and Supplementation Patterns as a COVID-19 Protective Factor (Cross-Sectional Study-Silesia, Poland). LIFE (BASEL, SWITZERLAND) 2022; 12:life12121976. [PMID: 36556341 PMCID: PMC9781383 DOI: 10.3390/life12121976] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND The COVID-19 pandemic has become a challenge for the world today, so it is very important to create healthy eating habits in society to support immunity and raise awareness of the benefits of supplementation. OBJECTIVE The purpose of this study is to evaluate diet and dietary supplementation, since previous studies indicate the protective nature of these in building immunity during the pandemic and post-pandemic period (COVID-19). The hypothesis of the study is whether the dietary regimen presented by the COVID-19 respondents can be considered protective in building immunity against SARS-CoV-2. MATERIAL AND METHODS The study included 304 subjects, with an average age of 39.04 ± 23.59. The main criteria for inclusion in the study were that the respondent was ≥18 years old and participated voluntarily. The study was conducted using an original questionnaire. RESULTS In the study group, no change was noticed in the previous diet during the COVID-19 pandemic, while the level of physical activity among the respondents decreased. Too low a percentage of people regularly consumed, among other foods. legume seeds-only 10.5% of respondents consumed them several times a week-and citrus fruits-the largest number of respondents, as many as 39.8%, only consumed them several times a month. The largest percentage of respondents with mild/scanty COVID-19 disease regularly took vitamin C-containing preparations (n = 61; 59.80%). Statistical analysis showed that there was a correlation between the incidence of mild/scanty COVID-19 and the regularity of taking vitamin C-containing preparations (T = 11.374; r = 0.611; p = 0.04603). A statistical significance level was also obtained for the regularity of supplementation of multivitamin preparations, which were taken by 68% (34) of respondents affected by mild/scanty COVID-19 (T = 13.456; r = 0.711; p = 0.02191). CONCLUSIONS The study's hypothesis was supported. Respondents characterized by a normal dietary pattern and taking supplements commonly recognized as immune "boosters" were more likely to mildly survive COVID-19. Moreover, it was shown that the pandemic in most of the respondents did not significantly affect their dietary strategy. It is reasonable to conclude that the dietary patterns adopted may be a common way to prevent SARS-CoV-2 infections and their possible complications.
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Zekeya N, Mamiro B, Ndossi H, Mallya RC, Kilonzo M, Kisingo A, Mtambo M, Kideghesho J, Chilongola J. Screening and evaluation of cytotoxicity and antiviral effects of secondary metabolites from water extracts of Bersama abyssinica against SARS-CoV-2 Delta. BMC Complement Med Ther 2022; 22:280. [PMID: 36289484 PMCID: PMC9598020 DOI: 10.1186/s12906-022-03754-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 10/07/2022] [Indexed: 11/10/2022] Open
Abstract
Background Bersama abyssinica is a common herb in Africa, with diverse medical uses in different areas. The plant is well-known in Tanzania for treating respiratory disorders such as TB, tonsillitis, bronchitis, and asthma, and it has lately been utilized to treat COVID-19 symptoms. Water extract of leaf and stem bark has been registered as an herbal medication known as 'Coviba Dawa' in Tanzania for the relief of bacterial respiratory infections. The extracts, however, have not been scientifically tested for their anti-viral activities. The aim of this work was to test for the cytotoxicity and antiviral effects of bioactive ingredients from B. abyssinica extracts against the Delta variant of the SARS-CoV-2 coronavirus. Methods B. abyssinica leaves and stem bark were dried under shade in room temperature and then pulverized to obtain small pieces before soaking into different solvents. One hundred grams of each, leaves and stem bark, were extracted in petroleum ether, dichloromethane, ethyl acetate and methanol. Water extract was obtained by decoction of stem bark and leaves into water. Phenols, flavonoids, tannins, and antioxidants were confirmed as components of the extracts. Analysis of polar extracts of bark stem bark and leaves was done. Antiviral screening and cytotoxicity experiments were conducted in a Biosafety Level 3 (BSL-3) Laboratory facility according to International Standard Operating Procedures (SOPs). Results By the use of LC–MS/MS analysis, this study confirmed the existence of four phenolic compounds in B. abyssinica water extract; 2,4-di-tert-butylphenol, 4-formyl-2-methoxyphenyl propionate, 7,8-Dihydroxy-4-methylcoumarin, and 2,3, 6-trimethoxyflavone with antioxidant activity. This study showed that, while the water extracts of B. abyssinica had significant antiviral activity against SARS Cov2 virus, it showed no cytotoxicity effect on Vero E6 cells. In particular, the water extract (Coviba dawa) showed 75% while ethylacetate fraction of B. abyssinica leaves showed a 50% in vitro viral inhibition, indicating that these substances may be useful for the development of future anti-viral agents. Conclusion We therefore recommend isolation of compounds for further profiling and development with a broader concentration range. We further recommend studies that determine the antiviral activity of extracts of B.abyssinica on other viral pathogens of clinical concern. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-022-03754-3.
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Affiliation(s)
- Never Zekeya
- grid.442468.80000 0001 0566 9529Department of Wildlife Management, College of African Wildlife Management, CAWM, P.O. Box 3031, Mweka, Moshi, Kilimanjaro Tanzania
| | - Bertha Mamiro
- grid.463666.70000 0001 0358 5436Tanzania Industrial Research and Development Organization (TIRDO), P.O. Box 23235, Msasani, Dar es Salaam, Tanzania
| | - Humphrey Ndossi
- grid.463666.70000 0001 0358 5436Tanzania Industrial Research and Development Organization (TIRDO), P.O. Box 23235, Msasani, Dar es Salaam, Tanzania
| | - Rehema Chande Mallya
- grid.25867.3e0000 0001 1481 7466School of Pharmacy and Pharmacognosy, Muhimbili University of Health and Allied Sciences, P.O. Box 65014, Dar es salaam, Tanzania
| | - Mhuji Kilonzo
- grid.442459.a0000 0001 1998 2954University of Dodoma, Dodoma, Tanzania
| | - Alex Kisingo
- grid.442468.80000 0001 0566 9529Department of Wildlife Management, College of African Wildlife Management, CAWM, P.O. Box 3031, Mweka, Moshi, Kilimanjaro Tanzania
| | - Mkumbukwa Mtambo
- grid.463666.70000 0001 0358 5436Tanzania Industrial Research and Development Organization (TIRDO), P.O. Box 23235, Msasani, Dar es Salaam, Tanzania
| | - Jafari Kideghesho
- grid.442468.80000 0001 0566 9529Department of Wildlife Management, College of African Wildlife Management, CAWM, P.O. Box 3031, Mweka, Moshi, Kilimanjaro Tanzania
| | - Jaffu Chilongola
- grid.412898.e0000 0004 0648 0439Kilimanjaro Christian Medical University College, P.O. Box 2240, Moshi, Kilimanjaro Tanzania
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Tirado-Kulieva VA, Hernández-Martínez E, Choque-Rivera TJ. Phenolic compounds versus SARS-CoV-2: An update on the main findings against COVID-19. Heliyon 2022; 8:e10702. [PMID: 36157310 PMCID: PMC9484857 DOI: 10.1016/j.heliyon.2022.e10702] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/04/2022] [Accepted: 09/14/2022] [Indexed: 11/25/2022] Open
Abstract
The COVID-19 pandemic caused by SARS-CoV-2 remains an international concern. Although there are drugs to fight it, new natural alternatives such as polyphenols are essential due to their antioxidant activity and high antiviral potential. In this context, this review reports the main findings on the effect of phenolic compounds (PCs) against SARS-CoV-2 virus. First, the proven activity of PCs against different human viruses is briefly detailed, which serves as a starting point to study their anti-COVID-19 potential. SARS-CoV-2 targets (its proteins) are defined. Findings from in silico, in vitro and in vivo studies of a wide variety of phenolic compounds are shown, emphasizing their mechanism of action, which is fundamental for drug design. Furthermore, clinical trials have demonstrated the effectiveness of PCs in the prevention and as a possible therapeutic management against COVID-19. The results were complemented with information on the influence of polyphenols in strengthening/modulating the immune system. It is recommended to investigate compounds such as vitamins, minerals, alkaloids, triterpenes and fatty acids, and their synergistic use with PCs, many of which have been successful against SARS-CoV-2. Based on findings on other viruses, synergistic evaluation of PCs with accepted drugs against COVID-19 is also suggested. Other recommendations and limitations are also shown, which is useful for professionals involved in the development of efficient, safe and low-cost therapeutic strategies based on plant matrices rich in PCs. To the authors' knowledge, this manuscript is the first to evaluate the relationship between the antiviral and immunomodulatory (including anti-inflammatory and antioxidant effects) activity of PCs and their underlying mechanisms in relation to the fight against COVID-19. It is also of interest for the general population to be informed about the importance of consuming foods rich in bioactive compounds for their health benefits. Phenolic compounds are known for their high potential against various human viruses. Phenolic compounds also have anti-inflammatory and immunomodulatory activity. Medicinal plants used against COVID-19 are rich in phenolic compounds. Phenolic compounds interfere with the activity of SARS-CoV-2 proteins. A wide variety of food products with high polyphenolic content are presented.
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