Journal
FITOTERAPIA
Volume 83, Issue 5, Pages 973-978Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fitote.2012.04.019
Keywords
Tydemania expeditionis; Steroid; Prostate cancer; Androgen receptor; Docking
Categories
Funding
- National Natural Science Foundation of China [30801433, 91029704]
- New Century Excellent Talents Scheme of the Ministry of Education [NCET-08-0612]
- Fundamental Research Funds for the Central Universities [21609202]
- Hi-Tech Research and Development Program of China [SS2012AA021103]
- Chinese Academy of Sciences [XDA01040305]
Ask authors/readers for more resources
A new diketosteroid, (E)-stigmasta-24(28)-en-3,6-dione (1), along with three known steroids (2-4) was isolated from marine alga Tydemania expeditionis collected in China Sea. Their structures were elucidated by extensive spectroscopic methods. Comparison of the chemical constituents revealed significant diversity among different locations. The biological activities of 1, 3 and 4 were evaluated on the prostate cancer cell lines and androgen receptor. Compound 1 exhibited moderate inhibitory activities against the prostate cancer cells DU145, PC3 and LNCaP with IC50 values of 31.27 +/- 1.50. 40.59 +/- 3.10 and 19.80 +/- 3.84 mu M, respectively. Compound 3 showed more potent activities with IC50 values of 12.38 +/- 2.47, 2.14 +/- 0.33 and 1.38 +/- 0.07 mu M, respectively. However, compound 4 showed only weak inhibitory activities on LNCaP cells and was inactive on DU 145 and PC3 cells. A competitive binding assay showed that compound 1 exhibited significant affinity to the androgen receptor with an IC50 value of 7.19 +/- 0.45 mu M, while 3 and 4 were inactive. The fact that the inhibitory properties of 1 and 3 against the prostate cancer cells were inconsistent with their affinities to the androgen receptor suggested that there might be other mechanism of action involved in the cytotoxic activity. (C) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available