ABSTRACT
Aim: Several medicinal uses have been reported for Anthocleista djalonensis and many types of pure compounds have been isolated. However, the anti-cancer activity of this plant has not been proven. The aim of this study was to screen for the phytochemicals present in the rootn-hexane, ethyl acetate, and acetone extracts of Anthocleista djalonensis, and to evaluate its anticancer potential against human cervix adenocarcinoma cells (HeLa cells) in vitro. Place and Duration of Study: The study was carried out in Department of Organic Chemistry, Rhodes University, Grahamstown, South Africa. The duration period was between March and July, 2016. Methodology: Extracts were prepared by soaking the root powder in the respective solvents with continuous stirring; The extracts were filtered and evaporated to remove the solvents. The extracts were then screened for phytocompounds by preliminary screening methods. Anti-cancer potential was carried out by a Resazurin assay and CC50 values were determined. Results: The extracts showed the presence of carbohydrates, glucoside, alkaloids, flavonoids, terpenoids, tannins, saponins, sterols. All extracts demonstrated moderate cytotoxicity against HeLa cells. Conclusion: The hexane, ethyl acetate and acetone extracts showed anticancer property. The roots extracts of Anthocleista djalonesis were thus found to possess potential anticancer activities.
ABSTRACT
ABSTRACT The permanent investigation of new antimycobacterial drugs is necessary for the eradication programs of tuberculosis and other mycobacterium-related diseases. The aim of the present study is to search for new sources of antimycobacterial drugs using plant materials. In this study, 11 plant materials (extracts, essential oils and some fractions) obtained from 4 species of medicinal plants traditionally used as general therapeutics for different illnesses and specifically as treatment of tuberculosis, were evaluated using the microplate resazurin assay against 2 species of the Mycobacterium tuberculosis Complex and 3 nontuberculous mycobacteria. The results showed the hexane extract and the essential oil from fruits of Pterodonemarginatus (Vogel) as potential sources of antimycobacterial drugs against 4 species of tested mycobacteria. The hexane fraction of methanol extract from leaves of Centella asiatica also presented significant mycobacterial growth inhibition, but against M. chelonae only. In conclusion, it was possible to contribute to the antimycobacterial investigations by presenting three new samples of plants with significant antimicrobial activity against four Mycobacteriumspp and suggest future studies about the antimycobacterial properties of fruits from P. emarginatus.
RESUMO A investigação permanente de novas drogas antimicobacterianas é necessária no programa de erradicação da tuberculose e de outras doenças relacionadas com micobactérias. O objetivo deste estudo foi buscar novas fontes de drogas antimicobacterianas usando material vegetal. Neste estudo, 11 materiais de base vegetal (extratos, óleos essenciais e algumas frações) foram avaliados contra 5 espécies de micobactérias. Estes materiais foram obtidos a partir de 4 espécies de plantas medicinais tradicionalmente utilizadas como terapêutica geral para diferentes doenças e, especificamente, no tratamento de tuberculose (Baccharis dracunculifolia, Centella asiatica, Lantana camara, Pterodon emarginatus). Os ensaios foram realizados em microplacas com resazurina contra duas espécies do Complexo Mycobacteriumtuberculosis e 3 espécies de micobactérias não tuberculosas. Os resultados mostraram o extrato hexânico e o óleo essencial de frutos de P.emarginatus como potenciais fontes para drogas antimicobacterianas contra quatro espécies de micobactérias testadas. A fração hexânica do extrato metanólico das folhas de C. asiatica também apresentou significativa inibição do crescimento de micobactérias apenas contra M.chelonae. Em conclusão, foi possível contribuir para as investigações de antimicobacterianos por apresentar três novas amostras de plantas com atividade antimicrobiana significativa contra quatro Mycobacterium spp e sugerir a realização de estudos futuros sobre as propriedades antimicobacterianas de frutos de P. emarginatus.
Subject(s)
/classification , Baccharis/classification , Lantana/classification , Anti-Infective Agents/pharmacology , Plants , Nontuberculous MycobacteriaABSTRACT
The aim of this work was to investigate and compare the antiproliferative, antioxidant and antibacterial activities of Rosmarinus officinalis essential oil, native to Pakistan. The essential oil content from the leaves of R. officinalis was 0.93 g 100g-1. The GC and GC-MS analysis revealed that the major components determined in R. officinalis essential oil were 1,8-cineol (38.5 percent), camphor (17.1 percent), α-pinene (12.3 percent), limonene (6.23 percent), camphene (6.00 percent) and linalool (5.70 percent). The antiproliferative activity was tested against two cancer (MCF-7 and LNCaP) and one fibroblast cell line (NIH-3T3) using the MTT assay, while, the antioxidant activity was evaluated by the reduction of 2, 2-diphenyl-1-picryl hydrazyl (DPPH) and measuring percent inhibition of peroxidation in linoleic acid system. The disc diffusion and modified resazurin microtitre-plate assays were used to evaluate the inhibition zones (IZ) and minimum inhibitory concentration (MIC) of R. officinalis essential oil, respectively. It is concluded from the results that Rosmarinus officinalis essential oil exhibited antiproliferative, antioxidant and antibacterial activities.