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Anthelmintic potency of Rumex crispus L. extracts on Caenorhabditis elegans and non-targeted identification of their bioactive compounds
Saudi Journal of Biological Sciences  (IF4.219),  Pub Date : 2021-09-17, DOI: 10.1016/j.sjbs.2021.09.026
Oladayo Amed Idris, Olubunmi Abosede Wintola, Anthony Jide Afolayan

Traditional healers and ethnoveterinary therapists use several medicinal plants, such as Rumex crispus L., to treat endoparasite infections. R. crispus has been established by researchers to be effective agasint a few parasitic worms. In this study, we evaluated the potency of R. crispus extracts on the model organism, Caenorhabditis elegans and the bioactive compounds of the extracts were also identified. The solvent extracts of R. crispus were tested against C. elegans for up to 72 h. The effect of the extracts on C. elegans was examined using light microscopy (LM) and scanning electron microscopy (SEM). LM and SEM analysis showed damage on the body wall, reduced body and slight modifications of the nematode organs. The lethality test reveals a significant reduction in the viability of the nematode. The water extract of leaf (LF-WAE), among others, has the strongest potency against the nematode, with 83% lethality. Anlysis done with Fourier-transform infrared spectroscopy (FTIR) spectra reveals various characteristic vibration bands and fingerprint bands at 3400 - 600 cm−1, identifying phenols, organic acids, aromatics, amines, among others in the plant. The compounds were identified with liquid chromatography-mass spectrometry (LC-MS), which reveals the phytochemicals were under the categories of flavonoids, steroidal alkaloid and proanthocyanidin. In conclusion, this study confirmed that R. crispus has anthelmintic potential, using standardised C. elegans models as a tool and suggests that there could be novel compounds yet to be explored in the studied plant that could be of great benefit to livestock and humans.