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Published on: February 26, 2019
SNIPERs-Hijacking IAP activity to induce protein degradation
Mikihiko Naito1, Nobumichi Ohoka1, Norihito Shibata1
1Division of Molecular Target and Gene Therapy Products, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki 210-9501, Japan.
Specific and non-genetic inhibitor of apoptosis protein (IAP)-dependent protein erasers (SNIPERs) induce targeted protein degradation. SNIPERs degrade IAPs and target proteins, offering a novel strategy for cancer therapy.
Area of Science:
- Drug Discovery
- Molecular Biology
- Oncology
Background:
- Proteolysis-targeting chimeras (PROTACs) offer a novel approach to drug development by inducing targeted protein degradation.
- Inhibitor of apoptosis proteins (IAPs) are frequently overexpressed in cancer, contributing to therapeutic resistance.
Purpose of the Study:
- To develop novel chimeric molecules, termed specific and non-genetic IAP-dependent protein erasers (SNIPERs), for targeted protein degradation.
- To investigate the mechanism of SNIPERs in recruiting IAP ubiquitin ligases for simultaneous degradation of IAPs and target proteins.
Main Methods:
- Design and synthesis of SNIPER molecules.
- Assay development to measure protein degradation.
- Evaluation of SNIPER efficacy in cancer cell models.
Main Results:
- SNIPERs successfully recruit IAP ubiquitin ligases to induce targeted protein degradation.
- SNIPERs achieve simultaneous degradation of IAPs (cIAP1, XIAP) and target proteins.
- SNIPERs demonstrate potential in efficiently eliminating cancer cells overexpressing IAPs.
Conclusions:
- SNIPERs represent a novel class of degraders with a unique mechanism of action.
- The simultaneous degradation of IAPs and target proteins by SNIPERs offers a promising therapeutic strategy for overcoming cancer therapy resistance.
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