A novel inhibitor of hypoxia-inducible factor-1α P3155 also modulates PI3K pathway and inhibits growth of prostate cancer cells

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• 作者：Sonal M Manohar (1)
  Amol A Padgaonkar (1)
  Archana Jalota-Badhwar (1)
  Vinay Sonawane (1)
  Maggie J Rathos (1)
  Sanjay Kumar (2)
  Kalpana S Joshi (3)
  
• 关键词：P3155 ; HIF ; 1α ; prostate cancer ; PI3K
• 刊名：BMC Cancer
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：11
• 期：1
• 全文大小：1330KB
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  33. The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2407/11/338/prepub
  
• 作者单位：Sonal M Manohar (1)
  Amol A Padgaonkar (1)
  Archana Jalota-Badhwar (1)
  Vinay Sonawane (1)
  Maggie J Rathos (1)
  Sanjay Kumar (2)
  Kalpana S Joshi (3)
  
  1. Department of Pharmacology, Piramal Life Sciences Limited, 1-Nirlon Complex, Goregaon, Mumbai, 400 063, India
  2. Department of Medicinal Chemistry, Piramal Life Sciences Limited, 1-Nirlon Complex, Goregaon, Mumbai, 400 063, India
  3. Target Identification Group, Piramal Life Sciences Limited, 1-Nirlon Complex, Goregaon, Mumbai, 400 063, India
  
• ISSN：1471-2407

文摘

Background Hypoxia-inducible factor-1 (HIF-1) is a master regulator of the transcriptional response to hypoxia. It is essential for angiogenesis and is associated with tumor progression and overexpression of HIF-1α has been demonstrated in many common human cancers. Therefore, HIF-1α is one of the most compelling anticancer targets. Methods To identify HIF-1α inhibitors, luciferase reporter gene assay under hypoxia and normoxia was used. Detailed studies such as western blotting, RT-PCR, immunofluorescence were carried out to elucidate its mechanism of action. Antiangiogenic activity of P3155 was demonstrated by migration assay and tube formation assay. Efficacy study of P3155 was performed on PC-3 xenograft model. Results P3155 showed specific HIF-1α inhibition with IC50 of 1.4 μM under hypoxia. It suppressed HIF-1α expression as well as PI3K/Akt pathway and abrogated expression of HIF-1-inducible gene viz. vascular endothelial growth factor (VEGF). P3155 in combination with HIF-1α siRNA showed significant synergistic effect. In addition, it demonstrated significant in vivo efficacy and antiangiogenic potential in prostate cancer cell lines. Conclusion We have identified a novel HIF-1α inhibitor P3155 that also modulates PI3K/Akt pathway, which may contribute to its significant in vitro and in vivo antitumor activity.