This study aimed to investigate the cytotoxicity and anticancer activity of (±)-kusunokinin derivatives ((±)-TTPG-A and (±)-TTPG-B). The cytotoxicity effect was performed on human cancer cells, including breast cancer, cholangiocarcinoma, colon and ovarian cancer-cells, compared with normal cells, using the MTT assay. Cell-cycle arrest and apoptosis were detected using flow-cytometry analysis. We found that (±)-TTPG-B exhibited the strongest cytotoxicity on aggressive breast-cancer (MDA-MB-468 and MDA-MB-231) and cholangiocarcinoma (KKU-M213), with an IC50 value of 0.43 ± 0.01, 1.83 ± 0.04 and 0.01 ± 0.001 µM, respectively. Interestingly, (±)-TTPG-A and (±)-TTPG-B exhibited less toxicity than (±)-kusunokinin (9.75 ± 0.39 µM) on L-929 cells (normal fibroblasts). Moreover, (±)-TTPG-A predominated the ell-cycle arrest at the S phase, while (±)-TTPG-B caused cell arrest at the G0/G1 phase, in the same way as (±)-kusunokinin in KKU-M213 cells. Both (±)-TTPG-A and (±)-TTPG-B induced apoptosis and multi-caspase activity more than (±)-kusunokinin. Taken together, we conclude that (±)-TTPG-A and (±)-TTPG-B have a strong anticancer effect on cholangiocarcinoma. Moreover, (±)-TTPG-B could be a potential candidate compound for breast cancer and cholangiocarcinoma in the future.
本研究旨在探讨(±)-kusunokinin 衍生物((±)-TTPG-A 和 (±)-TTPG-B)的细胞毒性和抗癌活性。采用 MTT 法对人类癌细胞(包括乳腺癌、胆管癌、结肠癌和卵巢癌细胞)与正常细胞进行了细胞毒性比较。使用流式细胞仪分析检测细胞周期停滞和细胞凋亡。我们发现,(±)-TTPG-B 对侵袭性乳腺癌(MDA-MB-468 和 MDA-MB-231)和胆管癌(KKU-M213)的细胞毒性最强,IC50 值分别为 0.43 ± 0.01、1.83 ± 0.04 和 0.01 ± 0.001 µM。有趣的是,(±)-TTPG-A 和(±)-TTPG-B 对 L-929 细胞(正常成纤维细胞)的毒性低于(±)-kusunokinin(9.75 ± 0.39 µM)。此外,在 KKU-M213 细胞中,(±)-TTPG-A 主要导致细胞周期停滞在 S 期,而(±)-TTPG-B 则导致细胞停滞在 G0/G1 期,这与(±)-kusunokinin 的作用方式相同。(±)-TTPG-A和(±)-TTPG-B都比(±)-kusunokinin更能诱导细胞凋亡和多天冬酶活性。综上所述,我们认为(±)-TTPG-A和(±)-TTPG-B对胆管癌有很强的抗癌作用。此外,(±)-TTPG-B 未来可能成为乳腺癌和胆管癌的候选化合物。