Homo-PROTAC mediated suicide of MDM2 to treat non-small cell lung cancer
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The dose-related adverse effects of MDM2‒P53 inhibitors have caused significant concern in the development of clinical safe anticancer agents. Herein we report an unprecedented homo-PROTAC strategy for more effective disruption of MDM2‒P53 interaction. The design concept is inspired by the capacity of sub-stoichiometric catalytic PROTACs enabling to degrade an unwanted protein and the dual functions of MDM2 as an E3 ubiquitin ligase and a binding protein with tumor suppressor P53. The new homo-PROTACs are designed to induce self-degradation of MDM2. The results of the investigation have shown that PROTAC 11a efficiently dimerizes MDM2 with highly competitive binding activity and induces proteasome-dependent self-degradation of MDM2 in A549 non-small cell lung cancer cells. Furthermore, markedly, enantiomer 11a-1 exhibits potent in vivo antitumor activity in A549 xenograft nude mouse model, which is the first example of homo-PROTAC with in vivo therapeutic potency. This study demonstrates the potential of the homo-PROTAC as an alternative chemical tool for tumorigenic MDM2 knockdown, which could be developed into a safe therapy for cancer treatment.
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Compound 211 is a PROTAC molecule targeting MDM2 degradation based on MDM2 inhibitor Nutlin-3, effectively dimerizes MDM2 and induces its degradation in A549 NSCLC cells.
“Concurrently, Sheng’s team designed and synthesized a PROTAC molecule, compound 211, targeting MDM2 degradation (Table 4). This molecule was based on the MDM2 inhibitor Nutlin-3. Experimental results revealed that PROTAC 211 effectively dimerized MDM2 with high binding activity and induced its degradation in A549 NSCLC cells.”
From Recent advances in targeting the “undruggable” proteins: from drug discovery to clinical trials (2023) · cites this paper as [505]
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Heterobifunctional Ligase Recruiters Enable pan-Degradation of Inhibitor of Apoptosis Proteins
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- Authors
- He, S., Ma, J., Fang, Y., Liu, Y., Wu, S., Dong, G., Wang, W., & Sheng, C.
- Affiliations
- Shanghai University (CN)
- Second Military Medical University (CN)
- University of Arizona (US)
- Tongji University (CN)
- Corresponding author
- Dong, Guoqiang
- Wang, Wei
- Sheng, Chunquan
- Venue
- Acta Pharmaceutica Sinica B
- Publisher
- Elsevier BV
- Published
- 2021-06
- Volume
- 11
- Issue
- 6
- Pages
- 1617-1628
- ISSN
- 2211-3835 (ISSN-L)
- PMC
- PMC8245912
- OpenAlex
- W3110273518
- Cited by
- 91
- References
- 47
- Citations by year
- 2026: 11 · 2025: 20 · 2024: 17 · 2023: 18 · 2022: 22 · 2021: 3
- FWCI
- 3.65
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Acta Pharmaceutica Sinica B (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (21738002, 21807113, 82030105)
- Shanghai Municipal Education Commission (2019-01-07-00-07-E00073)
- National Key Research and Development Program of China (2020YFA0509100)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
- Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
- Keywords
- MDM2, p53, non-small cell lung cancer, E3 ubiquitin ligase, proteasomal degradation, enantiomers, A549 cells, xenograft antitumor activity, p53-MDM2 interaction
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