51. Design, synthesis and cytotoxic activity of N-Modified oleanolic saponins bearing A glucosamine
- Author
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She-Hung Chan, Hsin-Min Hsiao, Yu Pu Juang, Pi-Hui Liang, Jih-Hwa Guh, and You-Yu Lin
- Subjects
0301 basic medicine ,Glycosylation ,Stereochemistry ,Antineoplastic Agents ,01 natural sciences ,Structure-Activity Relationship ,03 medical and health sciences ,chemistry.chemical_compound ,Glucosamine ,Drug Discovery ,Tumor Cells, Cultured ,Humans ,Cytotoxic T cell ,Oleanolic Acid ,Cytotoxicity ,Oleanolic acid ,Alkyl ,Cell Proliferation ,Pharmacology ,chemistry.chemical_classification ,Dose-Response Relationship, Drug ,Molecular Structure ,010405 organic chemistry ,Organic Chemistry ,Glycoside ,General Medicine ,Saponins ,0104 chemical sciences ,Cytosol ,030104 developmental biology ,chemistry ,Drug Design ,Drug Screening Assays, Antitumor - Abstract
A series of N-acyl, N-alkoxycarbonyl, and N-alkylcarbamoyl derivatives of 2′-deoxy-glucosyl bearing oleanolic saponins were synthesized and evaluated against HL-60, PC-3, and HT29 tumor cancer cells. The SAR studies revealed that the activity increased in order of conjugation of 2′ -amino group with carbamate > amide > urea derivatives. Lengthening the alkyl chain increased the cytotoxicity, the peak activity was found to around heptyl to nonyl substitutions. 2′-N-heptoxycarbonyl derivative 56 was found to be the most cytotoxic (IC50 = 0.76 μM) against HL-60 cells. Due to the interesting SARs of alkyl substitutions, we hypothesized that their location in the cell was different, and pursued a location study using 2′-(4″-pentynoylamino) 2′-deoxy-glucosyl OA, which suggested that these compounds distributed mainly in the cytosol.
- Published
- 2018