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  1. Dini Permata Sari, Poppy Anjelisa Zaitun Hasibuan, Ridha Wati, Mohammad Basyuni, Sumardi
    Sains Malaysiana, 2018;47:1953-1959.
    The mangrove plant is known to produce secondary metabolite compounds, mainly isoprenoids. Polyisoprenoids (dolichol
    and polyprenol) are known to have antimicrobial, anticancer and antiviral activity. Therefore, this study aimed to
    determine the cytotoxic effects of polyisoprenoids from Rhizophora mucronata and Ceriops tagal leaves by evaluating
    the induction of apoptosis and cell cycle arrest and the inhibition of the expression of Bcl-2 and cyclin D1 in WiDr colon
    cancer cells. Cell death was determined based on IC50 values in MTT assays. The induction of apoptosis and alterations
    in the cell cycle were observed by flow cytometry. The expression of Bcl-2 and cyclin D1 proteins, which play a role in
    apoptosis and cell cycle regulation, was observed by immunocytochemistry. The results showed that polyisoprenoids
    from R. mucronata and C. tagal leaves exhibited toxicity against the WiDr cell line, with IC50 values of 278 ± 5.77 and
    276 ± 9.54 µg/mL, respectively. Polyisoprenoids from R. mucronata and C. tagal leaves significantly induced apoptosis
    and caused cell cycle arrest in G0/G1 phase, while also decreasing the expression of Bcl-2 and cyclin D1. Our results
    confirmed that polyisoprenoids from R. mucronata and C. tagal leaves have the potential to be developed as anticancer
    agents for colon cancer.
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