Abstract |
(Z)-2-(6-(Thieanisyl-2-yl)hexa-3-en-1,5-diynyl)benzenamine (THDB), an enediyne compound, was identified in our laboratory as a novel antineoplastic agent with broad spectrum of antitumor activities against many human cancer cells. THDB was found to inhibit the growth of HL-60 cells in a time-and dose-dependent manner. Cell cycle analysis showed G2/M phase arrest in HL-60 cells following 48 h exposure to THDB. Analysis of the cell cycle regulatory proteins demonstrated that THDB did not change the steady-state levels of cyclin B1, cyclin E, Cdk1 and Cdc25C, but decreased the protein levels of Cdk2 and cyclin A. THDB also caused a marked increase in apoptosis, as characterized by DNA fragmentation ( DNA ladder and sub G1 formation), and poly (ADP-ribose) polymerase (PARP) cleavage, which was associated with activation of caspase-3, caspase-8 and caspase-9. Moreover, the THDB-induced apoptosis was significantly attenuated in the presence of specific inhibitors of caspase-3, -8 and -9. These molecular alterations provide an insight into THDB-caused growth inhibition, G2/M arrest and apoptotic death of HL-60 cells.
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Authors | Yu-Jhang Lu, Sheng-Huei Yang, Ching-Ming Chien, Yi-Hsiung Lin, Xiu-Wei Hu, Zchong-Zcho Wu, Ming-Jung Wu, Shinne-Ren Lin |
Journal | Toxicology in vitro : an international journal published in association with BIBRA
(Toxicol In Vitro)
Vol. 21
Issue 1
Pg. 90-8
(Feb 2007)
ISSN: 0887-2333 [Print] England |
PMID | 17064874
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- (Z)-2-(6-(thieanisyl-2-yl)hexa-3-en-1,5-diynyl)benzenamine
- Actins
- Antineoplastic Agents
- Enediynes
- Tetrazolium Salts
- Thiazoles
- Poly(ADP-ribose) Polymerases
- Caspases
- thiazolyl blue
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Topics |
- Actins
(biosynthesis)
- Antineoplastic Agents
(chemical synthesis, toxicity)
- Apoptosis
(drug effects)
- Blotting, Western
- Caspases
(biosynthesis)
- Cell Division
(drug effects)
- Cell Proliferation
(drug effects)
- Cell Survival
(drug effects)
- Enediynes
(chemical synthesis, toxicity)
- Flow Cytometry
- G1 Phase
(drug effects)
- G2 Phase
(drug effects)
- HL-60 Cells
- Humans
- Poly(ADP-ribose) Polymerases
(biosynthesis)
- Resting Phase, Cell Cycle
(drug effects)
- Tetrazolium Salts
- Thiazoles
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