Cytotoxic Activities of Xanthones Isolated from Calophyllum depressinervosum and Calophyllum buxifolium Against SNU-1 and LS174T Cell Lines.

Gwendoline Cheng Lian Ee

Abstract


Abstract: A series of xanthones isolated from Calophyllum depressinervosum and Calophyllum buxifolium were studied for their cytotoxicities. Ananixanthone (1), caloxanthone B (2), caloxanthone I (3), caloxanthone J (4),  xanthochymone B (5), thwaitesixanthone (6), 1,3,5,6-tetrahydroxyxanthone (7) and  dombakinaxanthone (8) were successfully isolated from both Calophyllum species. These eight compounds and a synthetically derived compound, thwaitesixanthone monoacetate (9) were tested for cytotoxicity activities against stomach cancer, SNU-1 and LS-174T cell lines. Caloxanthone B (2) gave the highest cytotoxic activity against SNU-1 with an IC50 valueof 1.47μg/ml.  Meanwhile, xanthochymone B (5) shows the highest cytotoxic activity against LS-174T cell with an IC50 valueof 0.45μg/ml. The structure-activity relationship (SAR) studies predicted that the presence and arrangements of furano, pyrano and prenyl substituents in the xanthone skeleton are important towards the cytotoxic activity. A molecular docking simulation was performed to model the probable binding models of compound 2 into the HER-2 (PDB ID: 3PP0) and compound 5 into β-catenin (PDB ID: 1JDH).


Keywords


Calophyllum depressinervosum, Calophyllum buxifolium, xanthones, SNU-1, LS174T, SAR and Molecular docking.

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References


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DOI: https://doi.org/10.22200/pjpr.20172%25p

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