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Debnath A, Das A. Isolation of bioactive compounds from low-cost agricultural resources and its utilization in daily life. Access Microbiol 2024; 6:000660.v4. [PMID: 39045239 PMCID: PMC11261721 DOI: 10.1099/acmi.0.000660.v4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 05/08/2024] [Indexed: 07/25/2024] Open
Abstract
The ethanolic (80 %), methanolic (80 %) and aqueous decoction (100 % distilled water) of whole plant of Oxalis corniculata Linn (Indian Sorrel) was evaluated for its anti-microbial and antioxidant properties by in vitro methods. Methanolic (80 %) and ethanolic (80 %) decoctions showed significant antibacterial property against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Salmonella typhi bacterial strains. In comparison to Chloramphenicol (C30) against bacteria, 80 % ethanolic decoctions showed significant effect, among the decoctions. Nowadays though the standard soap is in huge demand but it's also facing major backlash due to the presence of synthetic compounds in it, which over long use may cause harmful effects on the skin health. Therefore, the organic soaps which are made up of natural ingredients, herbs or any sort Ayurvedic compound have fewer side effects on the human skin and are much safer than standard daily soap. The formulated therapeutic soap exhibits a significant amount of reducing potential (high FRAP and TAC values) and antioxidant activity (DPPH, ABTS assay).
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Affiliation(s)
- Anirban Debnath
- Department of Biotechnology, Adamas University, Barasat, Kolkata, West Bengal 700126, India
| | - Arpita Das
- Department of Biotechnology, Adamas University, Barasat, Kolkata, West Bengal 700126, India
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Shafiq NE, Mahdee AF, Mohammed Hasan ZY. Leaf Extracts of Moringa oleifera Cultivated in Baghdad: Characterization and Antimicrobial Potential against Endodontic Pathogens. ScientificWorldJournal 2024; 2024:6658164. [PMID: 38450244 PMCID: PMC10917486 DOI: 10.1155/2024/6658164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 03/08/2024] Open
Abstract
The use of medicinal plant preparations to clean and disinfect root canal infection is gaining popularity. The aim of this study was to evaluate the bioactive composition of leaf extracts of Moringa oleifera plants cultivated in Iraq (specifically Baghdad) and their antimicrobial activity against selected root canal pathogens for potential application in endodontic treatment. Materials and Methods. Moringa leaf extracts were prepared either through cold maceration or warm digestion techniques to perform an ethanolic or aqueous extraction, respectively. Phytochemical detection was performed before thin layer chromatography (TLC) and high-performance liquid chromatography (HPLC) to measure flavonoids and phenolic compounds within both extracts. Then, their antimicrobial activities were investigated against Streptococcus mutans, Enterococcus faecalis, and Candida albicans through minimal inhibitory concentration (MIC), minimal bactericidal concentration (MBC), and agar well diffusion assay in comparison to NaOCl and Ca(OH)2. Results. Phytochemical screening showed several active ingredients but with higher expression of flavonoids and phenolic compounds. Also, different types of these compounds were detected through TLC and quantified by HPLC. MIC values for ethanolic extract against Streptococcus mutans, Enterococcus faecalis, and Candida albicans were 60, 65, and 55, respectively, while for aqueous extract, MIC values were 70, 80, and 50, respectively. Aqueous extract showed a higher inhibition zone than ethanolic extract for both Streptococcus mutans and Enterococcus faecalis with a statistically significant difference (p ≤ 0.001) for all tested materials except with NaOCl and Ca(OH)2 in Streptococcus mutans and Enterococcus faecalis, respectively. The ethanolic extract showed a higher inhibition zone against Candida albicans, with a statistically significant difference (p ≤ 0.001) for all tested materials. Conclusion. Ethanolic and aqueous extracts of Moringa oleifera leaves cultivated in Baghdad contain considerable quantities of phytochemicals, especially flavonoid and phenolic compounds, and demonstrated antimicrobial activities against selected endodontic pathogens. Therefore, Moringa leaf extracts could be suggested as an alternative antimicrobial material in endodontic treatment.
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Affiliation(s)
- Nada E. Shafiq
- Restorative and Aesthetic Dentistry Department, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Anas F. Mahdee
- Restorative and Aesthetic Dentistry Department, College of Dentistry, University of Baghdad, Baghdad, Iraq
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Maiyo ZC, Njeru SN, Toroitich FJ, Indieka SA, Obonyo MA. Ethnobotanical study of medicinal plants used by the people of Mosop, Nandi County in Kenya. Front Pharmacol 2024; 14:1328903. [PMID: 38313073 PMCID: PMC10834697 DOI: 10.3389/fphar.2023.1328903] [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: 10/27/2023] [Accepted: 12/27/2023] [Indexed: 02/06/2024] Open
Abstract
Background: Throughout the history, nature has provided mankind with most of their basic needs, which include food, shelter, medicine, clothes, flavours, scents as well as raw materials. Given that they are an integral part of cultural heritage, medicinal plants have played a significant role in human healthcare systems around the world. Investigating various biological resources for use as medicines requires ethnomedicinal studies. Methods: Data on utilization of ethnomedicinal plants from local healers in Kenya's Mosop Sub-County in Nandi County was documented through open-ended, semi-structured questionnaires. A number of quantitative indices, such as the Use Citation (UC), Informant Consensus Factor (ICF), Use Value (UV), Frequency of Citation (FoC) and Relative Frequency of Citation (RFC) were used to convey the potential medical benefits, vitality and variety of the ethnomedicine. Results: 102 informants provided information on 253 ethnomedicinal plant species, classified into 74 families. There were 249 native plant species identified, along with few exotic species: Senegalia senegal (L.) Britton, Persea americana Mill, Carica papaya L. and Solanum betaceum Cav. Of all recorded species, 32% and 27% were herbs and trees, respectively. Among plant parts, leaves were most frequently utilized (27%) and roots (26%), while decoctions (21%) were the most widely used formulations. The dominant family was Asteraceae, with 28 species, followed by Lamiaceae, with 19 species. The highest ICF value was 0.778 for a number of parasitic and infectious illnesses, including ringworms, athlete's foot rot, tetanus, typhoid, intestinal parasites, abscesses, malaria, and amoebiasis. The study's data validates the region's widespread use of traditional medicinal plant remedies. Conclusion: The current study will lay a foundation of knowledge for future research investigations. The abundance of knowledge regarding ethnomedicinal species and their medicinal applications will stimulate further phytochemical and pharmacological research, which could lead to the discovery of potentially significant pharmaceuticals.
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Affiliation(s)
- Z C Maiyo
- Faculty of Science, Department of Biochemistry and Molecular Biology, Njoro, Kenya
| | - S N Njeru
- Centre for Traditional Medicine and Drug Research (CTMDR), Kenya Medical Research Institute, Nairobi, Kenya
| | - F J Toroitich
- Faculty of Science, Department of Biological Sciences, Egerton University, Njoro, Kenya
| | - S A Indieka
- Faculty of Science, Department of Biochemistry and Molecular Biology, Njoro, Kenya
| | - M A Obonyo
- Faculty of Science, Department of Biochemistry and Molecular Biology, Njoro, Kenya
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Muruthi CW, Ngugi MP, Runo SM, Mwitari PG. In vitro antioxidant activities of Carissa edulis ((Forssk) Vahl) and Pappea capensis (Eckyl. & Zeyh) extracts. Heliyon 2023; 9:e12965. [PMID: 36747936 PMCID: PMC9898664 DOI: 10.1016/j.heliyon.2023.e12965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 12/29/2022] [Accepted: 01/10/2023] [Indexed: 01/20/2023] Open
Abstract
Herbal medications are gaining popularity due to their long history of use in traditional medicine. They serve as a reservoir for a diverse array of phytocompounds linked to amelioration of oxidative stress. Oxidative stress is a disturbance in the balance between generation and elimination of reactive species in human body. Moreover, reactive species are implicated in the onset and progression of chronic disorders. The current therapeutic approaches despite showing efficacy are characterized by several limitations such as adverse effects and prohibitive costs. This drives the need to explore alternatives that can inhibit, ameliorate or reverse conditions caused by oxidative stress. Several studies have evaluated antioxidant effects of diverse plant extracts. C. edulis and P. capensis are used as traditional therapy among the African communities to manage oxidative stress-related ailments. However, there is limited research on the antioxidant effects of these medicinal plants. The current study, therefore, sought to evaluate the antioxidant and phytochemical profile, of C. edulis and P. capensis extracts. Samples were collected from Embu County, Kenya. In vitro antioxidant properties of the extracts were evaluated through ferric reduction, Iron chelating, hydroxyl radical, and DPPH radical scavenging activities. Activities of catalase, superoxide dismutase and glutathione reductases of the extracts were further determined. Phytochemical profiles were determined using Liquid Chromatography Mass Spectrophotometer (LC-MS) and Gas Chromatography Mass Spectrophotometer (GC-MS) analyses. The extracts displayed concentration dependent antioxidant activities. Phytochemical analyses revealed presence compounds which are associated with antioxidant activities including flavonoids, phenolics, tocopherols and terpenoids. The findings provide a scientific validation for the folklore use of C. edulis and P. capensis in management of oxidative stress. Nevertheless, there is a need for further purification and characterization of phytochemicals associated with antioxidant activities.
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Affiliation(s)
- Carolyn Wanjira Muruthi
- Department of Biochemistry, Microbiology and Biotechnology-Kenyatta University, Kenya,Corresponding author.
| | - Mathew Piero Ngugi
- Department of Biochemistry, Microbiology and Biotechnology-Kenyatta University, Kenya
| | - Steven Maina Runo
- Department of Biochemistry, Microbiology and Biotechnology-Kenyatta University, Kenya
| | - Peter Githaiga Mwitari
- Centre for Traditional Medicine and Drug Research-Kenya Medical Research Institute (KEMRI), Kenya
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Hounguè U, Villette C, Tokoudagba JM, Chaker AB, Remila L, Auger C, Heintz D, Gbaguidi FA, Schini-Kerth VB. Carissa edulis Vahl (Apocynaceae) extract, a medicinal plant of Benin pharmacopoeia, induces potent endothelium-dependent relaxation of coronary artery rings involving nitric oxide. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 105:154370. [PMID: 35977457 DOI: 10.1016/j.phymed.2022.154370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 07/14/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Hypertension is a major cardiovascular risk factor that affects most countries including those of Africa. Although Carissa edulis Vahl, Diodia scandens Sw. and Cleome gynandra L. are traditionally used in Benin as antihypertensive treatments with some efficacy mentioned by the local population, their biological activity on the cardiovascular system remains poorly studied. AIM The study investigated the vasoreactivity of the plants and assessed the underlying mechanisms using isolated arteries. STUDY DESIGN Aqueous-ethanolic extracts of aerial parts of C. edulis, D. scandens and C. gynandra were prepared by maceration before being subjected to multi-step liquid-liquid fractionation with solvents of increasing polarity. The vasoreactivity of the extracts and fractions were assessed on isolated porcine coronary artery and rat aorta using organ chambers, the role of nitric oxide (NO) using NG-nitro-L-arginine (NO synthase inhibitor), prostanoids using indomethacin (cyclooxygenases inhibitor) and endothelium-dependent hyperpolarization using TRAM-34 plus UCL 1684 (inhibitors of calcium-dependent K+ channels), and the vascular uptake of polyphenols using Neu reagent. RESULTS The aqueous-ethanolic crude extract of C. edulis (CECE) induced potent relaxations that were exclusively endothelium-dependent and more pronounced than those to D. scandens and C. gynandra. The n-butanolic fraction of C. edulis (CEBF) was more active than the cyclohexane, dichloromethane, and ethyl acetate fractions. The relaxation induced by CECE and CEBF were inhibited by NG-nitro-L-arginine and affected neither by TRAM-34 plus UCL 1684 nor by indomethacin. CEBF induced sustained endothelium-dependent relaxations for at least 60 min, and inhibited, in a concentration-dependent manner, contractions to KCl, CaCl2, U46619 and serotonin in rings with endothelium. Analysis of CEBF by LCHRMS indicated the presence of polyphenols, terpenes, and alkaloids. Exposure of coronary artery and aorta rings to CEBF caused the accumulation of polyphenols predominantly in the endothelium. CONCLUSION C. edulis leaf extract induced pronounced endothelium-dependent relaxations and inhibited contractile responses by stimulating the endothelial formation of NO. LCHRMS analysis of the most active fraction, the butanolic fraction, revealed the presence of numerous compounds including polyphenols, terpenes, and alkaloids. The polyphenols of CEBF accumulated preferentially in the endothelium of the arterial wall. Thus, these observations support the folkloric use of C. edulis in hypertension.
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Affiliation(s)
- Ursula Hounguè
- INSERM UMR 1260, Regenerative Nanomedicine, University of Strasbourg, Strasbourg, France; Medicinal Organic Chemistry Laboratory, Faculty of Health Sciences, University of Abomey-Calavi, Cotonou, Benin.
| | - Claire Villette
- CNRS, Plant Imaging and Mass Spectrometry (PIMS), IBMP, University of Strasbourg, Strasbourg, France.
| | - Jean-Marie Tokoudagba
- Medicinal Organic Chemistry Laboratory, Faculty of Health Sciences, University of Abomey-Calavi, Cotonou, Benin
| | - Ahmed B Chaker
- INSERM UMR 1260, Regenerative Nanomedicine, University of Strasbourg, Strasbourg, France
| | - Lamia Remila
- INSERM UMR 1260, Regenerative Nanomedicine, University of Strasbourg, Strasbourg, France
| | - Cyril Auger
- INSERM UMR 1260, Regenerative Nanomedicine, University of Strasbourg, Strasbourg, France.
| | - Dimitri Heintz
- CNRS, Plant Imaging and Mass Spectrometry (PIMS), IBMP, University of Strasbourg, Strasbourg, France.
| | - Fernand A Gbaguidi
- Medicinal Organic Chemistry Laboratory, Faculty of Health Sciences, University of Abomey-Calavi, Cotonou, Benin
| | - Valérie B Schini-Kerth
- INSERM UMR 1260, Regenerative Nanomedicine, University of Strasbourg, Strasbourg, France.
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Pfukwa TM, Pheiffer W, Fawole OA, Manley M, Mapiye C. Cellular antioxidant and viability efficacy of Harpephyllum caffrum peel and Syzygium guineense seed extracts. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Enhanced Anti-Skin-Aging Activity of Yeast Extract-Treated Resveratrol Rice DJ526. Molecules 2022; 27:molecules27061951. [PMID: 35335317 PMCID: PMC8954687 DOI: 10.3390/molecules27061951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/10/2022] [Accepted: 03/15/2022] [Indexed: 02/04/2023] Open
Abstract
Resveratrol is a powerful antioxidant that defends against oxidative stress in cells but is not found in large quantities in plants. Resveratrol-enriched rice DJ526, which was developed as a functional crop, shows a diverse range of biological activities. Resveratrol production is measured as total resveratrol and its glycoside, piceid, which is mainly found in plant-derived resveratrol. In the present study, elicitation using yeast extract (YE), methyl jasmonate, and jasmonic acid increased resveratrol production in DJ526 rice seeds. DJ526 seeds elicited using 1 g/L (YE1) and 5 g/L yeast extract (YE5) showed enhanced resveratrol production and antioxidant activity. YE5-treated DJ526 seeds showed decreased melanin content by 46.1% and 37.0% compared with the negative control and DJ526 (non-elicitation), respectively. Both YE1 and YE5 efficiently improved the wound-healing activity by reducing the wound gap faster than in untreated cells, with a maximum rate of 60.2% at 24 h and complete closure at 48 h. YE1 and YE5 significantly decreased the levels of proinflammatory cytokine, TNF-α, and enhanced collagen synthesis in inflammatory cells. These findings indicate that YE-treated resveratrol rice DJ526 may improve resveratrol production and could be an active antiaging ingredient for cosmetic and skin therapy applications.
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Dhatwalia J, Kumari A, Verma R, Upadhyay N, Guleria I, Lal S, Thakur S, Gudeta K, Kumar V, Chao JCJ, Sharma S, Kumar A, Manicum ALE, Lorenzo JM, Amarowicz R. Phytochemistry, Pharmacology, and Nutraceutical Profile of Carissa Species: An Updated Review. Molecules 2021; 26:molecules26227010. [PMID: 34834102 PMCID: PMC8624575 DOI: 10.3390/molecules26227010] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 01/17/2023] Open
Abstract
Carissa, a genus of the Apocynaceae family, consists of evergreen species, such as shrubs as well as small trees that are native to Asia, Africa, and Oceania’s subtropical and tropical regions. Most of the Carissa species are traditionally used to treat various diseases, such as chest pain, headaches, gonorrhoea, rheumatism, syphilis, oedema, rabies, stomach pain, hepatitis, cardiac diseases, and asthma. The pharmacological studies on Carissa species revealed its antioxidant, antimicrobial, anticancer, cardioprotective, antipyretic, analgesic, wound healing, anticonvulsant, antiarthritic, adaptogenic, anti-inflammatory, and antidiabetic activities, thus validating its use in indigenous medicine systems. The review article summarised the comprehensive literature available, including morphology, indigenous uses, bioactive composition, nutraceutical, and pharmacological activities of Carissa species. A total of 155 research papers were cited in this review article. The Carissa fruits are rich in dietary fibre, lipids, proteins, carbohydrates, vitamin C, and macro- and micro-elements. A total of 121 compounds (35 polyphenols (flavonoids and phenolic acids), 30 lignans, 41 terpenoids, 7 steroids, 2 coumarins, and 6 cardiac glycosides) have been extracted from C. spinarum, C. carandas, and C. macrocarpa. Among all chemical constituents, lupeol, carissol, naringin, carisssone, scopoletin, carissaeduloside A, D, J, carandinol, sarhamnoloside, carissanol, olivil, carinol, 3β-hydroxyolean-11-en-28,13β-oilde, ursolic acid, and carissone are the key bioactive constituents responsible for pharmacological activities of genus Carissa. The gathered ethnopharmacological information in the review will help to understand the therapeutic relevance of Carissa as well as paving a way for further exploration in the discovery of novel plant-based drugs.
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Affiliation(s)
- Jyoti Dhatwalia
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
| | - Amita Kumari
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
- Correspondence: (A.K.); (R.A.)
| | - Rachna Verma
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
| | - Navneet Upadhyay
- School of Pharmaceutical Sciences, Shoolini University, Solan 173212, HP, India;
| | - Ishita Guleria
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
| | - Sohan Lal
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
| | - Shabnam Thakur
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
| | - Kasahun Gudeta
- School of Biological and Environmental Sciences, Faculty of Sciences, Shoolini University, Solan 173212, HP, India; (J.D.); (R.V.); (I.G.); (S.L.); (S.T.); (K.G.)
- Department of Applied Biology, Adama Science and Technology University, Adama, P.O. Box 1888, Ethiopia
| | - Vikas Kumar
- University Institute of Biotechnology, Chandigarh University, Gharuan, Mohali, Punjab 140413, India;
| | - Jane C.-J. Chao
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, 250 Wu-Hsing Street, Taipei 11031, Taiwan;
- Nutrition Research Center, Taipei Medical University Hospital, 252 Wu-Hsing Street, Taipei 11031, Taiwan
| | - Somesh Sharma
- School of Bioengineering and Food Technology, Shoolini University of Biotechnology and Management, Solan 173229, HP, India;
| | - Ashwani Kumar
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar, Uttarakhand 249405, India;
| | | | - José M. Lorenzo
- Centro Tecnológico de la Carne de Galicia, Parque Tecnológico de Galicia, 32900 San Cibrao das Viñas, Spain;
- Área de Tecnología de los Alimentos, Facultad de Ciencias de Ourense, Universidad de Vigo, 32004 Ourense, Spain
| | - Ryszard Amarowicz
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, 10-748 Olsztyn, Poland
- Correspondence: (A.K.); (R.A.)
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Mbiydzenyuy NE, Pieme CA, Brown RE, Nguemeni C. Neuroscience education and research in Cameroon: Current status and future direction. IBRO Neurosci Rep 2021; 10:216-224. [PMID: 34179870 PMCID: PMC8211920 DOI: 10.1016/j.ibneur.2021.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/22/2020] [Accepted: 02/10/2021] [Indexed: 11/26/2022] Open
Abstract
Neurological disorders comprise 20% of hospital admissions in Cameroon. The burden of neurological disorders is increasing, especially in children and the elderly. However, there are very few neurologists, psychiatrists, gerontologists and neuropsychologists trained in the treatment of neurological disorders in Cameroon and there are very few facilities for training in basic and clinical neuroscience. Although non-governmental organizations such as the International Brain Research Organization (IBRO), International Society of Neurochemistry (ISN), and Teaching and Research in Natural Sciences for Development (TReND) in Africa have stepped in to provide short training courses and workshops in neuroscience, these are neither sufficient to train African neuroscientists nor to build the capacity to train neuroscience researchers and clinicians. There has also been little support from universities and the government for such training. While some participants of these schools have managed to form collaborations with foreign researchers and have been invited to study abroad, this does not facilitate the training of neuroscientists in Cameroon. Moreover, the research infrastructure for training in neuroscience remains limited. This is reflected in the low research output from Cameroonian universities in the field. In this review, we describe the burden of neurological disorders in Cameroon and outline the outstanding efforts of local scientists to develop the discipline of neuroscience, which is still an emerging field in Cameroon. We identify key actionable steps towards the improvement of the scientific capacity in neuroscience in Cameroon: (1) develop targeted neuroscience training programs in all major universities in Cameroon; (2) implement a thriving scientific environment supported by international collaborations; (3) focus on the leadership and the mentorship of both local and senior neuroscientists; (4) develop public awareness and information of policy makers to increase governmental funding for neuroscience research. Improving scientific capacity to tackle the neurological diseases burden in Cameroon is urgent. Neuroscience schools and advocated researchers shape the future of neuroscience in Cameroon. Public-private partnerships are required for sustainable country impact of neuroscience schools.
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Affiliation(s)
- Ngala Elvis Mbiydzenyuy
- Department of Basic Medical Science, School of Medicine, Copperbelt University, Ndola, Zambia
| | | | - Richard E Brown
- Department of Psychology and Neuroscience, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Carine Nguemeni
- Department of Neurology, University Hospital of Würzburg, Germany
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Yadang FSA, Nguezeye Y, Kom CW, Betote PHD, Mamat A, Tchokouaha LRY, Taiwé GS, Agbor GA, Bum EN. Scopolamine-Induced Memory Impairment in Mice: Neuroprotective Effects of Carissa edulis (Forssk.) Valh (Apocynaceae) Aqueous Extract. Int J Alzheimers Dis 2020; 2020:6372059. [PMID: 32934845 PMCID: PMC7479457 DOI: 10.1155/2020/6372059] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/30/2020] [Accepted: 06/29/2020] [Indexed: 01/30/2023] Open
Abstract
Alzheimer's disease is first characterised by memory loss related to the central cholinergic system alteration. Available drugs provide symptomatic treatment with known side effects. The present study is aimed to evaluate the properties of Carissa edulis aqueous extract on a Scopolamine mouse model as an attempt to search for new compounds against Alzheimer's disease-related memory impairment. Memory impairment was induced by administration of 1 mg/kg (i.p.) of Scopolamine for 7 days, and mice were treated with Carissa edulis aqueous extract. Behavioural studies were performed using T-maze and novel object recognition task for assessing learning and memory and open field test for locomotion. Brain acetylcholinesterase enzyme (AChE) activity was measured to evaluate the central cholinergic system. The level of MDA, glutathione, and catalase activity were measured to evaluate the oxidative stress level. Administration of Scopolamine shows a decrease in learning and memory enhancement during behavioural studies. A significant decrease in the time spent in the preferred arm of T-maze, in the time spent in the exploration of the novel object, and in the discrimination index of the familiar object was also observed. The significant impairment of the central cholinergic system was characterised in mice by an increase of AChE activity to 2.55 ± 0.10 mol/min/g with an increase in oxidative stress. Treatment with the different doses of Carissa edulis (62.8, 157, 314, and 628 mg/kg orally administrated) significantly increased the memory of mice in T-maze and novel object recognition tests and also ameliorated locomotion of mice in the open field. Carissa edulis aqueous extract treatment also decreases the AChE activity and brain oxidative stress. It is concluded that administration of Carissa edulis aqueous extract enhances memory of mice by reducing AChE activity and demonstrating antioxidant properties. This could be developed into a novel therapy against memory impairment related to Alzheimer's disease.
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Affiliation(s)
- Fanta Sabine Adeline Yadang
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
- Department of Biological Sciences, Faculty of Science, University of Ngaoundere, P.O. Box 454, Ngaoundere, Cameroon
| | - Yvette Nguezeye
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
- Department of Biological Sciences, Faculty of Science, University of Ngaoundere, P.O. Box 454, Ngaoundere, Cameroon
| | - Christelle Wayoue Kom
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
| | - Patrick Herve Diboue Betote
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
| | - Amina Mamat
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
- Department of Biological Sciences, Faculty of Science, University of Ngaoundere, P.O. Box 454, Ngaoundere, Cameroon
| | - Lauve Rachel Yamthe Tchokouaha
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
| | - Germain Sotoing Taiwé
- Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, P.O. Box 63, Buea, Cameroon
| | - Gabriel Agbor Agbor
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies, P.O. Box 13033, Yaounde, Cameroon
| | - Elisabeth Ngo Bum
- Department of Biological Sciences, Faculty of Science, University of Ngaoundere, P.O. Box 454, Ngaoundere, Cameroon
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