New betulinic acid derivatives as potent proteasome inhibitors.

New betulinic acid derivatives as potent proteasome inhibitors.
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DOI:
10.1016/j.bmcl.2011.07.072
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发表时间:
2011-10-01
影响因子:
2.7
通讯作者:
Lee, Kuo-Hsiung
Lee, Kuo-Hsiung
中科院分区:
医学4区
文献类型:
--
作者:
Qian, Keduo;Kim, Sang-Yong;Hung, Hsin-Yi;Huang, Li;Chen, Chin-Ho;Lee, Kuo-Hsiung

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In this study, 22 new betulinic acid (BA) derivatives were synthesized and tested for their inhibition of the chymotrypsin-like activity of 20S proteasome. From the SAR study, we concluded that the C-3 and C-30 positions are the pharmacophores for increasing the proteasome inhibition effects, and larger lipophilic or aromatic side chains are favored at these positions. Among the BA derivatives tested, compounds 13, 20, and 21 showed the best proteasome inhibition activity with IC50 values of 1.42, 1.56, and 1.80 µM, respectively, which are three- to four-fold more potent than the proteasome inhibition controls LLM-F and lactacystin.
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