Abstract:
:STAT3 is an attractive therapeutic target for cancer therapy. However, due to low potency or poor druggability, none of its inhibitors are clinically available. Herein, a series of aminobenzo[b]thiophene 1, 1-dioxides with good drug-likeness properties were designed, synthesized and evaluated as STAT3 inhibitors. Most of them exhibited higher antitumor activity than the small-molecule STAT3 inhibitor, Stattic. Compound 15 was the most potent and had an IC50 range in 0.33-0.75 μM in various cancer cell lines. The overexpressed and IL-6 induced phosphorylation levels of STAT3 were both inhibited by 15 without influencing the phosphorylation levels of the upstream kinases Src and Jak2. 15 also suppressed the expressions of STAT3 downstream gene, Bcl-2. 15 effectively increased the ROS levels of cancer cells, induced cancer cell apoptosis and abolished the colony formation ability of cancer cells without affecting bypass kinase p-Erk. Furthermore, 15in vivo induced significant antitumor responses, and exhibited less toxicity than Doxorubicin. Together, this study described a class of new STAT3 inhibitors as antitumor agents.
journal_name
Eur J Med Chemjournal_title
European journal of medicinal chemistryauthors
Zhang W,Ma T,Li S,Yang Y,Guo J,Yu W,Kong Ldoi
10.1016/j.ejmech.2016.09.068subject
Has Abstractpub_date
2017-01-05 00:00:00pages
538-550eissn
0223-5234issn
1768-3254pii
S0223-5234(16)30804-2journal_volume
125pub_type
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