Design, synthesis and evaluation of 1,2-benzisothiazol-3-one derivatives as potent caspase-3 inhibitors
2013
Liu, Dazhi | Tian, Zhen | Yan, Zhihui | Wu, Lixin | Ma, Yan | Wang, Quan | Liu, Wei | Zhou, Honggang | Yang, Cheng
A number of 1,2-benzisothiazol-3-one derivatives were prepared through structural modification of the original compound from high-throughput screening. Some analogues (e.g., 6b, 6r, 6s and 6w) were identified as novel and potent caspase inhibitors with IC₅₀ of nanomolar. Structure–activity relationship (SAR) studies for caspase-3 inhibition were evaluated in vitro. Molecular modeling studies provided further insight into the interaction of this class of compounds with activated caspase-3. The present small molecule caspase-3 inhibitor with novel structures different from structures of known caspase inhibitors revealed a new direction for therapeutic strategies directed against diseases involving abnormally up-regulated apoptosis.
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