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Background:  Mangrove plants produce polyisoprenoid compounds. Polyisoprenoids have been proven to have anticancer properties. This study investigated the inhibitory activity of polyisoprenoids derived from the leaves of mangrove plants  Avicennia alba  and  Avicennia lanata  regarding the expression of PI3K, Akt1, mTOR, P53, and EGFR genes against human colorectal adenocarcinoma WiDr cells.    Methods:  Anticancer activity was tested through the MTT assay method performed on WiDr cells. The cell cycle and apoptosis were analysed by flow cytometry and double staining. Gene expression of PI3K, Akt1, mTOR, P53, and EGFR was observed using the RT-PCR method.    Results:  Cytotoxic activity against WiDr cells showed that the IC50 for  A. alba  and  A. lanata  was 258.14 ug/mL and 243.32 ug/mL, respectively. This observation indicated the possibility to develop moderate anticancer agents. The cell cycle showed that inhibition of  A. alba  and  A. lanata  occurred in the late phase of apoptosis S (10.60 and 10.51%) and G2-M1 (22.05 and 23.84%), which was higher than negative and positive control cells. Furthermore, the polyisoprenoids derived from  A. alba  and  A. lanata  leaves exhibited anticancer activity in WiDr cells through the downregulated gene expression of PI3K, Akt1, mTOR, and EGFR as well as the upregulated gene expression of P53.    Conclusion:  This study demonstrated that polyisoprenoids obtained from  A. alba  and  A. lanata  leaves are promising chemopreventive agents for colon cancer.

f1000research

Effects of polyisoprenoids from Avicennia lanata and Avicennia alba leaves on the gene expression of PI3K, Akt1, mTOR, P53, and EGFR in human colorectal adenocarcinoma WiDr cells