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Original Article

J App Pharm Sci. 2021; 11(8): 98-107

Evaluating the effect of amine-geldanamycin hybrids on anticancer activity

Tipparat Samsawat, Chanjira Jaramornburapong, Weerachai Phutdhawong, Waya S. Phutdhawong, Thongchai Taechowisan.

Three new geldanamycin (GDM) derivatives, 17-((S)-2-amino-3-(1H-indol-3-ylpropan-1-ol)-17- demethoxygeldanamycin (2), 17-((S)-2-amino-3-phenylpropan-1-ol)-17-demethoxygeldanamycin (3), and 17-((S)-4- (2-amino-3-hydroxypropyl)phenol)-17-demethoxygeldanamycin (4), were synthesized by nucleophilic substitution of GDM (1). The binding ability of these compounds at the N-terminal domain of heat shock protein [Protein Data Bank (PDB) ID: 1OSF] derived from the PDB was analyzed by ligandprotein docking. Hydrogen-bonding interactions of compounds 2 and 3 were equal to those of 17-dimethylamino-ethylamino-17-demethoxygeldanamycin (17-DMAG), with binding energies of −98.33 and −122.41 kcal/mol, respectively. The solubility of the synthesized compounds was ascertained. The solubilities of compounds 2, 3, and 4 in water were 5.571 mM, 1.963 mM, and 1.918 mM, higher than that of compound 1 by approximately 36.65, 12.91, and 12.62 times, respectively. The cytotoxicity activity of the synthesized compounds was also evaluated against cancer cell lines using a tetrazolium-based colorimetric assay. These compounds showed high anticancer activity against human cervical carcinoma cells cells, with inhibitory concentration (IC50) values in the range of 19.3645.66 g/ml, which were better than that of compound 1, with IC50 values of 110.46 g/ml. Compound 3 also exhibited cytotoxic activity against human hepatocellular carcinoma cells cells, with an IC50 value of 24.62 g/ml. These compounds were less active against MDA-MB-231 cells, compared with compound 1. Compound 2 also showed weak cytotoxic activity on Vero and LLC-MK2 cells, with IC50 values of 229.19 and 330.58 g/ml, respectively. The predicted results indicated that these compounds have similar absorption, distribution, metabolism, excretion, and toxicity () parameters as well as structures predictive of hepatotoxicity. The results showed that some of the synthesized compounds revealed selective cytotoxicity toward some cancer cells. Therefore, further studies on the synthesized compounds could be helpful in the treatment of some cancers.

Key words: ADMET, Amine-geldanamycin hybrids, Anticancer activity, Cytotoxicity activity, Geldanamycin derivatives, Molecular docking, Solubility.

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