A novel p21 attenuator which is structurally related to sorafenib

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Published on: July 17, 2020

Hiromi I Wettersten1, Sung Hee Hwang, Cuiwen Li

  • 1Division of Nephrology, Department of Internal Medicine, University of California, Davis, Davis, CA, USA.

Cancer Biology & Therapy
|January 10, 2013
PubMed

Insights

A novel p21 inhibitor, UC2288, selectively reduces p21 protein levels and inhibits cancer cell growth. This compound offers a new tool for studying p21's role in disease and may have future clinical applications.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Pharmacology

Background:

  • p21, a cyclin-dependent kinase inhibitor, is crucial for cell cycle regulation and apoptosis.
  • Dysregulation of p21 is implicated in various diseases, including cancer and atherosclerosis.
  • Targeting p21 protein levels offers a potential therapeutic strategy for diverse diseases.

Purpose of the Study:

  • To introduce and characterize a novel, selective p21 attenuator, UC2288.
  • To investigate the mechanism of action of UC2288.
  • To evaluate the anti-cancer efficacy of UC2288.

Main Methods:

  • Synthesis of UC2288 based on the sorafenib chemical model.
  • Assessment of kinase inhibition (Raf kinases) and p-ERK levels.
  • Analysis of p21 mRNA and protein expression, and protein stability.
  • In vitro cell growth inhibition assays in kidney and other cancer cell lines.

Main Results:

  • UC2288 selectively attenuates p21 levels without inhibiting Raf kinases or affecting p-ERK.
  • UC2288 reduces p21 mRNA expression independently of p53 and minimally impacts p21 protein stability.
  • UC2288 demonstrated significant growth inhibition in kidney and other cancer cell lines (GI50 ≈ 10 µM).

Conclusions:

  • UC2288 is a novel and selective inhibitor of p21.
  • This compound provides a valuable tool for elucidating p21 function in disease.
  • UC2288 shows potential for future clinical translation in cancer therapy.
Keywords:
apoptosisp21p21 inhibitorproliferationsorafenib

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