Speaker Biography

Manal Hamed

Theodor Bilharz Research Institute, Egypt

Title: The biological activity of Conocarpus erectus extracts and their applications as cytotoxic agents

Manal Hamed

Manal Mortady is a Professor of Medicinal Chemistry at Theodor Bilharz Research Institute (TBRI) from 2017 to till now. She had done her PhD in Organic Chemistry at Cairo University. Manal is a member at Egyptian Society of Natural Toxins and also a member in other 9 societies. She published 30 research papers. She is editorial board member for International Journals of : The Public Science Framework and The Journal of Harmonized Research Publications.




Essential oils are found to have multiple active components which can show in vitro cytotoxic action against various cancerous cell lines. This study reports the in vitro cytotoxic effects of the essential oil from Conocarpus erectus (Combretaceae) growing wild in Egypt. Water-distilled essential oil of C. erectus was examined for its cytotoxic effects using a modified brine shrimp and MTT assays. Fresh leaves aerial part of C. erectus was subjected to hydro distillation using a Clevenger-type apparatusvolatile to obtain its volatile oil. Cytotoxicity of the essential oil was measured against HepG2 cancer cells and brine shrimps larva. The essential oil 50% cytotoxic concentrations were found to be 33µg/ml and 8.7µg/ml against brine shrimp and human liver carcinoma HepG2 cell line, respectively; thus the volatile oil displayed good cytotoxic action against the human tumor cell line. Moreover, C. erectus methanol extract was very effective; it exhibited cytotoxic activity against brine shrimp larva within IC50 value of 15µg/ml. The investigation from GC Mass, led to the identification of 12 constituents, representing 97.53% of the total oil, of which  the major chemical constituents were identified by gas chromatography mass spectrometry as being rich in 3-(2,2 dimethylpropylid ene)bicyclo[3.3.1]nonane-2,4-dione (3) (67.12%), (decanoic acid derevatives (11) (7.77%), 22-tritetracontanone (12) (6.03%), 1-octanol, 2-butyl- (2) (5.51%) and oleic acid (6) (4.33%). This is the first report on anticancer potential and separation of essential oils from Cerectus.  The findings of this study necessitate the need for further consideration of this essential oil in anti-neoplastic chemotherapy.