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Rational design and diversity-oriented synthesis of peptoid-based selective HDAC6 inhibitors.

D Diedrich1, A Hamacher1, C G W Gertzen1

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Researchers developed novel histone deacetylase (HDAC) inhibitors using a multicomponent synthesis. The most potent HDAC6 inhibitor showed significant chemosensitizing effects and reversed cisplatin resistance in cancer cells.

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Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Histone deacetylases (HDACs) are crucial epigenetic regulators implicated in various cancers.
  • Developing selective HDAC inhibitors is a key strategy for cancer therapy.
  • HDAC6 is a specific isoform linked to drug resistance and cancer progression.

Purpose of the Study:

  • To synthesize and characterize a novel mini-library of HDAC inhibitors.
  • To identify potent and selective HDAC6 inhibitors.
  • To evaluate the chemosensitizing potential and ability to overcome drug resistance of lead compounds.

Main Methods:

  • Efficient multicomponent reaction strategy for library synthesis.
  • In vitro enzymatic assays to determine HDAC inhibition and selectivity.
  • Cell-based assays using cisplatin-resistant cancer cell lines (Cal27 CisR).

Main Results:

  • Successful synthesis of a mini-library of peptoid-based HDAC inhibitors.
  • Identification of four potent HDAC6 inhibitors with high selectivity over other HDAC isoforms.
  • The lead HDAC6 inhibitor demonstrated significant chemosensitizing properties.
  • Complete reversal of cisplatin resistance in Cal27 CisR cells by the lead compound.

Conclusions:

  • The developed multicomponent approach is effective for generating HDAC inhibitor libraries.
  • The novel HDAC6 inhibitors show promise as therapeutic agents.
  • Targeting HDAC6 may be a viable strategy to overcome cisplatin resistance in cancer treatment.