Proteolysis-targeting chimera (PROTAC) in cancer: design principles and applications on "undruggable" targets
Xun Lu1,2,3, Jianliang Qin4, Shuilin Dong1,2,3
1Division of Hepato-Pancreato-Biliary Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, 1095 Jiefang Avenue, Wuhan, 430030, China.
Abstract:
Targeted cancer therapies can enhance in vivo efficacy and decrease side effects by changing the distribution and exposure of specific biomolecules in tissues. Nevertheless, there are many cancer target proteins that cannot be targeted by traditional drugs. Some new technologies and drug design strategies have been applied to overcome these "undruggable" targets, among which the most well-known and classic technology is proteolysis-targeting chimeras (PROTACs). In order to design a better PROTAC structure for targeting "undruggable" targets, we elaborated in detail on the design of protein of interest (POI) ligands, E3 ligase ligands and linkers in PROTAC structures, the predicting of PROTAC ternary complex structures, and the advantages and disadvantages of using carriers in PROTAC delivery systems. In addition, this article also reviews the current research status of PROTAC targeting "undruggable" targets, such as kirsten rat sarcoma (KRAS), epidermal growth factor receptor (EGFR), c-Myc and p53. The challenges faced by PROTACs and the possible solutions were discussed, and the possibility of PROTAC broadening the range of drug therapeutic targets, especially the "undruggable" target, was prospected.
Insights
Proteolysis-targeting chimeras (PROTACs) offer a novel approach to target previously "undruggable" cancer proteins. This review details PROTAC design, delivery, and its potential to expand cancer therapy options.
Area of Science:
- Oncology
- Molecular Biology
- Drug Discovery
Background:
- Targeted cancer therapies aim to improve efficacy and reduce side effects by modulating biomolecule distribution.
- Many critical cancer-related proteins remain
Purpose of the Study:
- To provide a comprehensive overview of proteolysis-targeting chimeras (PROTACs) for targeting
- To discuss the design principles of PROTACs, including ligands, linkers, and ternary complex prediction.
- To review the application of PROTACs against challenging
Main Methods:
- Detailed elaboration on the design of protein of interest (POI) ligands, E3 ligase ligands, and linkers.
- Prediction of PROTAC ternary complex structures.
- Review of PROTAC delivery systems and carrier utilization.
Main Results:
- Discussion on the current status of PROTACs targeting key
- Analysis of the advantages and disadvantages of PROTAC delivery systems.
- Exploration of PROTACs' potential in overcoming resistance mechanisms.
Conclusions:
- PROTACs represent a promising strategy for targeting previously undruggable proteins in cancer therapy.
- Further research into PROTAC design and delivery systems is crucial for clinical translation.
- PROTAC technology has the potential to significantly broaden the scope of therapeutic targets in oncology.
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