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Activable Targeted Protein Degradation Platform Based on Light-triggered Singlet Oxygen.

Silong Zhang1, Yuanyuan Li2, Tao Li1

  • 1Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province, College of Chemistry and Chemical Engineering, Institute of Advanced Materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.

Journal of Medicinal Chemistry
|February 15, 2022
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A new light-activated targeted protein degradation platform, PS-Degrons, offers precise control over protein knockdown. This technology shows promise for therapeutic applications by enabling selective degradation of target proteins like estrogen receptor alpha.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Chemical Biology

Background:

  • Targeted protein degradation technologies, such as Proteolysis-Targeting Chimeras (PROTACs), are emerging therapeutic modalities.
  • Existing methods face challenges, including potential systemic toxicity.

Purpose of the Study:

  • To introduce a novel, activable targeted protein degradation platform called PS-Degrons.
  • To demonstrate the platform's ability to controllably degrade target proteins with spatiotemporal precision.

Main Methods:

  • Conjugation of photosensitizers and protein ligands to create PS-Degrons.
  • Utilizing light-triggered singlet oxygen (¹O₂) for protein degradation.
  • Evaluating the degradation of human estrogen receptor alpha (ERα) using a lead compound, PSDalpha.

Main Results:

  • PS-Degrons function as a generalizable platform for targeted protein degradation.
  • Visible light activation of PS-Degrons leads to efficient and controllable protein knockdown.
  • The lead compound PSDalpha completely degraded ERα, demonstrating significant anti-proliferation effects on MCF-7 cells.

Conclusions:

  • PS-Degrons offer a modular strategy for controllable protein degradation, complementary to existing technologies.
  • This platform has the potential to overcome the systemic toxicity associated with PROTACs.
  • PS-Degrons may open new avenues for biochemical research and therapeutic development.