GC-MS PROFILING, ANTIMICROBIAL, ANTIOXIDANT AND ANTI-INFLAMMATORY ANALYSIS OF THE N-HEXANE EXTRACT OF THE SEEDS OF RAPHIA HOOKERI OBTAINED IN DELTA STATE
DOI:
https://doi.org/10.5281/zenodo.18271190Keywords:
Raphia hookeri, antioxidant, antimicrobial, anti-inflammatory, GC-MSAbstract
Raphia hookeri is widely employed in African traditional medicine for diverse therapeutic purposes; however, its bioactive potential remains inadequately investigated. This study examined the chemical composition of the n-hexane seed extract of Raphia hookeri and assessed its antioxidant, antimicrobial, and anti-inflammatory activities. Preliminary phytochemical analysis revealed the presence of terpenoids, phenolic compounds, sterols, and cardiac glycosides. Antioxidant evaluation using the DPPH radical scavenging assay demonstrated notable antioxidant activity, indicating the strong bioactive potential of the seed oil. The antimicrobial activity of the extract was tested against Staphylococcus aureus, Helicobacter pylori, Escherichia coli, Candida albicans, and Candida krusei. The extract exhibited pronounced antimicrobial efficacy against all tested organisms, with zones of inhibition ranging from 18 to 25 mm. Anti-inflammatory assessment showed a maximum inhibition of 60.15% at a concentration of 500 µg/mL, compared to 89.13% inhibition obtained for diclofenac used as the reference drug. The minimum inhibitory concentration (MIC) for the extract was determined to be 2.5 mg/mL. These findings provide scientific support for the therapeutic relevance of Raphia hookeri seed oil and highlight its potential application in pharmaceutical, nutraceutical, and industrial formulations aimed at developing sustainable and affordable health solutions.
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References
Abogo Mebale, A. J., Mefouet Abesolo, D. D., Ombouma, J. G., Ondo, J. A., Allogho Mve, J., and Menye Biyogo, R. (2022). Phytochemical characterisation and antioxidant potential of Raphia hookeri mesocarp from Mebole (Gabon). Journal of pharmacognosy and phytochemistry, 11(1): 67-70. https://doi.org/10.22271/phyto.2022.v11.i1 a.14354
Adesegun, S. A. (2014). Alpha amylase inhibition and antioxidant potentials of Raphia Hookeri (Palmae). Natural products an indian journal, 10(1): 34-38
Ajao, A. A., Moteetee, A. N. and Sabiu, S. (2021). From traditional wine to medicine: phytochemistry, pharmacological properties and biotechnological applications of Raphia hookeri G. Mann & Wendi (Arecaceae). South African journal of botany, 138: 184-192. https://doi.org/10.1016/j.sajb.2020.12.023. Anosike, C. A., Obidoa, O., & Ezeanyika, L. U. S.
(2012). Membrane stabilization as a mechanism of the anti-inflammatory activity of methanol extract of Gardenia aqualla leaves. International Journal of Pharmaceutical Sciences and Research, 3(9), 3643–3648.
AOAC (2016). Official Methods of Analysis of the Association of Official Analytical Chemists, 20th ed., AOAC International, Gaithersburg, MD.
Brand-williams, W., Cuvelier, M. E., and Berset, C. (1995). Use of free radical method to evaluate antioxidant activity. Lebensmittel Wissenschaft nd Technologie, 28(1): 25-30.
Burkill, H. M. (1985). The useful plants of West Tropical Africa. Royal Botanical Gardens, Kew, UK. 2nd (Ed): Vol 4
Chen, X., Dang, T. T. T., & Facchini, P. J. (2015). Noscapine comes of age. Phytochemistry, 111, 7–13. https://doi.org/10.1016/j.phytochem.2014.09.008
Clinical and Laboratory Standards Institute (CLSI). (2018). Performance standards for antimicrobial susceptibility testing. CLSI supplement M100Cowan, S. T. and Steel, K. J. (1965). Manual of Identification of Medical Bacteria. Cambridge University Press, New York. 1-40.
Cowan, M. M. (1999). Plant products as antimicrobial agents. Clinical Microbiology Reviews, 12(4), 564–582.
Dada, F. A., Oyeleye, S. I., Ogunsuyi, O. B., Olaseinde, T. A., Adefagha, S. A., Oboh, G. and Boligon, A. A. (2017). Phenolic constituents and modulation effects of Raphia palm (Raphia hookeri) extract on carbohydrate-hydrolysing enzymes linked to type-2 diabetes. Journal of traditional and complementary medicine, 7(4): 494-500.
https://doi.org/10.1016/j.jtcme.2017.01.003 De Oliveira, M. S., Ribeiro, J. M., Camara, R. B., & Carvalho, A. S. (2021). Chemical composition and biological activities of extracts from leaves, roots, and seeds of Raphia Hookeri. Journal of Medicinal Plants Research, 15(8), 312–321.
Desbois, A. P., & Smith, V. J. (2010). Antibacterial free fatty acids: Activities, mechanisms of action and biotechnological potential. Applied Microbiology and Biotechnology, 85, 1629–1642.
Emwanta, D. O., Ngochindo, R. I., Odokuma, L. O. and Eruteya, C. O. (2018). Synthesis and evaluation of the antimicrobial activities of halogenated imidazoles and their Mn(II), Ni(II) and Zn(II) complexes. International journal of biological and pharmaceutical science, 4(1): 14-20
Erhabor, J. O., Omokhua, A.G. and McGaw, L. J (2018). In Vitro biological activities and safety evaluation of Raphia hookeri (Arecaceae). South African Journal of Botany, 115: 284-285. https://doi.org/10.1016/j.sajb.2018.02.036 Erukainure, O. L., Oyebode, O. A., Chukwuma, C. I., Matsabisa, M. G., Koorbanally, N. A. and Islam, M. S. (2019). Raphia palm (Raphia hokeri) wine inhibits glucose diffusion; improves antioxidative activities; and modulates dysregulated pathways and metabolites in oxidative pancreatic injury. Journal of Biochemistry, 43(3): e12749. https://doi.org/10.1111/jfbc.12749
Erukainure, O. L., Oyebode, O. A., Ijomone, O. M., Chukwuma, C. I., Koorbanally, N. A. and Islam, M. S. (2019). Raphia pal (Raphia hookeri G. Mann & Wendi) wine modulates glucose homeostatis by enhancing insulin secretion and inhibition redox imbalance in a rat model of diabetes-induced by a high fructose diet and streptozocin. Journal of ethnopharmacology, 237: 159-170.
https://doi.org/10.1016/j.jep.2019.03.039
Harborne, J. B. (1998). Phytochemical Methods: A Guide to Modern Techniques of Plant Analysis, 3rd ed.,
Chapman & Hall, London. Ibegbulem, C. O., Igwe, C. U., Okwu, G. N., Ujowundu, C. O., Onyeike, C. N. and Ayalogu, E. O. (2013) Total amino acid profiles of heat processed fresh Elaeis guineensis and Raphia hookeri wines. Food chemistry, 138(2-3): 1616-1620. https://doi.org/10.1016/j.foodchem.2012.11.110
Karimi, E., Oskoueian, E., Hendra, R., & Jaafar, H. Z. E. (2015). Evaluation of Crocus sativus L. stigma phenolic and flavonoid compounds and its antioxidant activity. Molecules, 15, 6244–6256.
Khatua, S., Ghosh, S., and Acharya, K. (2017). Simplified methods for microtiter-based analysis of in vitro antioxidant activity. Asian Journal of Pharmaceutics, 11(2): 327-335
Mbaka, G. O., Ogbonnia, S. O., Oyeniran, K. J. and Awopetu, P. I. (2012). Effect of Raphia hookeri Seed Extract on Blood Glucose, Glycosylated Haemoglobin and Lipid Profile of Alloxan Induced Diabetic Rats. British Journal of Medicine & Medical Research, 2(4621-635
Mpinga, E. K., Kandolo, T., Verloo, H., Bukonda, N. K. Z., Kandala, N. and Chastanay, P. (2013). Traditional alternative medicines and the right health; key elements for a convention on global health. Health and Human Health Rights, 15: 44-57
Obahiagbon, F. and Osagie, A. (2007) Sugar and microminerals composition of sap produced by Raphia hookeri palms. African journal of food science, 6(6): 744-750
Ogueke, C. C., Jude, N., Okoli, I. C., and Anyanwu, B. N. (2007). Antibacterial activities and toxicological potentials of crude ethanolic extracts of Euphorbia hirta, Journal of American Science, 3(3):11- 16
Ogwuche, C. E., Aina T., and Hamza B. (2025). Studies on essential oils extracted from Hippocratae Velutina leaves in relation to Chemical Composition, Antioxidant and Antimicrobial Activities. Malaysian Journal of Science, 44(1): 28-33
Oluyori, A. P., Nwonuma, C., Akpo, T., Inyibor, A. B., Dada, O. A., Oladeji, O. S., and Ogunnupebi, T. A. (2022). In Vivo Antiplasmodial potential of the leaf, mesocarp and epicarp of the Raphia hokeri plant in Mice infected with plasmodium berghei NK65. Evid based complement alternat med, Vol. 13.
https://doi.org/10.1155/2022/4129045
Oluyori, A. P., Oluwasogo, D. A., and Inyibor, A. A. (2018). Phytochemical analysis and antioxidant potential of Raphia hookeri leaf and epicarp. Oriental Journal of Chemistry, 34(6): 2742-2746
Silverstein, R. M., Webster, F. X., Kiemle, D. J., & Bryce, D. L. (2014). Spectrometric Identification of Organic Compounds (8th ed.). John Wiley & Sons.
Umerie, S. C. (2000). Caramel production from saps of African oil palm (Elaeis guineensis) and wine palm (Raphia hookeri) trees. Bioresources Technology, 75(2): 167-169. https://doi/10.1016/50960-8524(00)00012- 2
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