Abstract |
The growth inhibition of human cancer cells via T-type Ca(2+) channel blockade has been well known. Herein, a series of new 3,4-dihydroquinazoline derivatives were synthesized via a brief SAR study on KYS05090 template and evaluated for both T-type Ca(2+) channel (Cav3.1) blockade and cytotoxicity on three human ovarian cancer cells (SK-OV-3, A2780 and A2780-T). Most of compounds except 6i generally exhibited more potent cytotoxicity on SK-OV-3 than mibefradil as a positive control regardless of the degree of T-type channel blockade. In particular, eight compounds ( KYS05090, 6a and 6c-6h) showing strong channel blockade exhibited almost equal and more potent cytotoxicity on A2780 when compared to mibefradil. On A2780-T paclitaxel-resistant human ovarian carcinoma, two compounds ( KYS05090 and 6d) were 20-fold more active than mibefradil. With respect to cell cycle arrest effect on A2780 and A2780-T cells, KYS05090 induced large proportion of sub-G1 phase in the cell cycle progression of A2780 and A2780-T, meaning the induction of cancer cell death instead of cell cycle arrest via blocking T-type Ca(2+) channel. Among new analogues, compounds 6g and 6h induced cell cycle arrest at G1 phase of A2780 and A2780-T cells in dose-dependent manner and exhibited strong anti-proliferation effects of ovarian cancer cells by blocking T-type Ca(2+) channel. Furthermore, 6g and 6h possessing strong cytotoxic effects could induce apoptosis of A2780 cells, which was detected by confocal micrographs using DAPI staining.
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Authors | Sun Jeong Jang, Heung Woo Choi, Doo Li Choi, Sehyeon Cho, Hong-Kun Rim, Hye-Eun Choi, Ki-Sun Kim, Minghua Huang, Hyewhon Rhim, Kyung-Tae Lee, Jae Yeol Lee |
Journal | Bioorganic & medicinal chemistry letters
(Bioorg Med Chem Lett)
Vol. 23
Issue 24
Pg. 6656-62
(Dec 15 2013)
ISSN: 1464-3405 [Electronic] England |
PMID | 24220170
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2013 Elsevier Ltd. All rights reserved. |
Chemical References |
- Calcium Channel Blockers
- Calcium Channels, T-Type
- KYS 05090
- Quinazolines
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Topics |
- Calcium Channel Blockers
(chemical synthesis, chemistry, toxicity)
- Calcium Channels, T-Type
(chemistry, metabolism)
- Cell Cycle Checkpoints
(drug effects)
- Cell Line, Tumor
- Cell Survival
(drug effects)
- Female
- Humans
- Ovarian Neoplasms
(metabolism, pathology)
- Quinazolines
(chemical synthesis, chemistry, toxicity)
- Structure-Activity Relationship
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