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Synthesis and evaluation of spiroisoxazoline oxindoles as anticancer agents

Carlos J A Ribeiro1, Joana D Amaral1, Cecília M P Rodrigues1

  • 1Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal.

Bioorganic & Medicinal Chemistry
|November 26, 2013
PubMed

Insights

Researchers developed novel spiroisoxazoline oxindoles to inhibit the p53-MDM2 interaction, a key cancer target. Seven compounds demonstrated superior antiproliferative activity and induced apoptosis, validating their potential as cancer therapeutics.

Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Oncology

Background:

  • Restoring tumor suppressor p53 levels is crucial for cancer treatment.
  • Inhibiting the p53-MDM2 interaction is a promising strategy to reactivate p53.
  • MDM2 is an oncoprotein that targets p53 for degradation.

Purpose of the Study:

  • To synthesize and evaluate novel spiroisoxazoline oxindoles as inhibitors of the p53-MDM2 interaction.
  • To identify compounds with potent antiproliferative activity against cancer cells.
  • To confirm the mechanism of action, including apoptosis induction and p53-MDM2 interaction inhibition.

Main Methods:

  • Synthesis of eighteen spiroisoxazoline oxindoles derivatives.
  • In vitro antiproliferative assays against cancer cell lines.
  • Apoptosis assays to determine mode of cell death.
  • Live-cell bimolecular fluorescence complementation (BiFC) assay to assess p53-MDM2 interaction inhibition.

Main Results:

  • Seven synthesized compounds exhibited superior antiproliferative effects compared to nutlin-3.
  • The active compounds induced cancer cell death via apoptosis.
  • Proof-of-concept was established by demonstrating inhibition of p53-MDM2 interaction in a cellular assay.

Conclusions:

  • Spiroisoxazoline oxindoles represent a promising class of novel p53-MDM2 interaction inhibitors.
  • These compounds hold potential for development as anticancer agents by restoring p53 function.
  • The study validates the therapeutic strategy of targeting the p53-MDM2 axis.
Keywords:
CancerMDM2Protein–protein interactionsSpiro compoundsp53

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