15,16-Dihydrotanshinone I (DHTS) is a component of the traditional Chinese medicinal plant Salvia miltiorrhiza Bunge. In this study, DHTS at as low as 2.5 μg/ml concentration significantly inhibited proliferation of human benign (SW480) and malignant (SW620) colorectal cancer cells, as shown by 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5- diphenytetrazoliumromide (MTT) and flow cytometric analysis. Activating transcription factor (ATF)-3, a basic leucine zippertype transcription factor, was found to be predominantly upregulated in DHTS-treated SW480 and SW620 cells. The upregulation of ATF3 was blocked by a c-JUN N-terminal kinase (JNK) or p38 inhibitor. Overexpression of ATF3 resulted in a significant augmentation of DHTS-induced apoptosis of SW480 cells, but resistance to DHTS-induced apoptosis of SW620 cells. These results suggest that DHTS has a strong therapeutic or preventive potential against cancer. In addition, ATF3 has a dual role in DHTS-induced apoptosis, depending on the degree of malignancy of colorectal cancer.
|頁（從 - 到）||3225-3232|
|出版狀態||已發佈 - 八月 2013|
ASJC Scopus subject areas
- Cancer Research
Suk, F. M., Jou, W. J., Lin, R-J., Lin, S. Y., Tzeng, F. Y., & Liang, Y. C. (2013). 15,16-dihydrotanshinone i-induced apoptosis in human colorectal cancer cells: Involvement of ATF3. Anticancer Research, 33(8), 3225-3232.