Abstract
Trichostatin A, an antifungal antibiotics, and HC-toxin are potent and specific inhibitors of histone deacetylase activity. Histone deacetylase inhibitors are new class of chemotherapeutic drugs able to induce tumor cell apoptosis and/ or cell cycle arrest. In this study, the antiproliferative activities of trichostatin A and HC-toxin were compared between estrogen receptor positive human breast cancer cell MCF-7 and estrogen receptor negative human breast cancer cell MDA-MB-468. Trichostatin A and HC-toxin showed potent antiproliferative activity in both MCF-7 and MDA-MB-468 cells. In MCF-7 cells that contain high level estrogen receptor, trichostatin A and HC-toxin brought about three-times more potent cell growth inhibitory effect than estrogen receptor negative MDA-MB-468 cells. Both trichostatin A and HC-toxin showed cell cycle arrest at G2/M phases of MCF-7 and MDA-MB-468 cells in a dose- and time- dependent manner. Trichostatin A and HC-toxin also induced apoptosis from MCF-7 and MDA-MB-468 cells in a dose- and time-dependent manner. Results of this study suggested that antiproliferative effects of trichostatin A and HC-toxin might be involved in estrogen receptor signaling pathway, but cell cycle arrest and apoptosis of trichostatin A and HC-toxin might not be involved in estrogen receptor system of human breast cancer cells.
| Original language | English |
|---|---|
| Pages (from-to) | 554-561 |
| Number of pages | 8 |
| Journal | Archives of Pharmacal Research |
| Volume | 27 |
| Issue number | 5 |
| DOIs | |
| State | Published - 31 May 2004 |
Bibliographical note
Funding Information:This research was supported by the grant NTP 238 from the KFDA of Korea.
Keywords
- Estrogen receptor
- HC-toxin
- HDAC
- Human breast cancer cell
- MCF-7
- MDA-MB-468
- Trichostatin A