Abstract
Based on the lead compound L-80 (compound 2), a potent heat shock protein 90 (HSP90) inhibitor, a series of C-ring truncated deguelin analogs were designed, synthesized and evaluated for Hypoxia Inducible Factor-1α (HIF-1α) inhibition as a primary screening method. Their structure–activity relationship was investigated in a systematic manner by varying the A/B ring, linker and D/E ring, respectively. Among the synthesized inhibitors, compound 5 exhibited potent HIF-1α inhibition in a dose-dependent manner and significant antitumor activity in human non-small cell lung carcinoma (H1299), with better activities than L-80. It also inhibited in vitro hypoxia-mediated angiogenic processes in human retinal microvascular endothelial cells (HRMEC). The docking study of 5 showed a similar binding mode as L-80: it occupied the C-terminal ATP-binding pocket of HSP90, indicating that the anticancer and antiangiogenic activities of 5 were derived from HIF-1α destabilization by inhibiting the C-terminal ATP-binding site of hHSP90.
| Original language | English |
|---|---|
| Pages (from-to) | 6082-6093 |
| Number of pages | 12 |
| Journal | Bioorganic and Medicinal Chemistry |
| Volume | 24 |
| Issue number | 22 |
| DOIs | |
| State | Published - 2016 |
Keywords
- Antitumor
- Deguelin
- Heat shock protein 90
- HIF-1
- HSP90
- Hypoxia Inducible Factor-1