In vitro antiplasmodial activity, cytotoxicity, and gas chromatography - flame ionization detector metabolites fingerprint of extracts and fractions from Tetrorchidium didymostemon.

Journal of Ayurveda and Integrative Medicine
Osamudiamen EbohonEhimwenma Sheena Omoregie


Tetrorchidium didymostemon is used as an antimalarial remedy in southern Nigeria. This study was aimed at providing scientific validation for the use of T. didymostemon in the treatment of malaria in Nigeria. Plasmodium falciparum 3D7 (Pf3D7) strain was cultured and maintained in fresh O+ human erythrocytes. Standard methods were used to evaluate in vitro antiplasmodial activity, cytotoxic effect on Vero cell line, phytochemical screening, and antioxidant capacity. Gas Chromatography - Flame Ionization Detector (GC-FID) metabolite fingerprinting of the most potent fraction was carried out. The methanol leaf extract had higher antiplasmodial activity (IC50Pf3D7 = 25 ± 0.21 μg/mL) in comparison with the stem bark extract (SBE) (IC50Pf3D7 = 50 ± 0.94 μg/mL). The n-hexane fraction of the leaf extract had the best antiplasmodial activity (IC50Pf3D7 = 3.92 ± 0.46 μg/mL) and selectivity index. This was followed by the dichloromethane (IC50Pf3D7 = 12.5 ± 1.32 μg/mL), ethyl acetate (IC50Pf3D7 = 35.0 ± 4.80 μg/mL), and hydromethanol fraction which was inactive (IC50Pf3D7 > 100 μg/mL). All extracts and fractions were not toxic on Vero cell line (CC50 > 1000 μg/mL). The n-hexane and dichloromethane fractions had the highest amount of phyto...Continue Reading


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