Jul 2026· Journal of Medicinal Chemistry· Vol 69, pp. 16784-16800· 0 citations· 33 references
Medicine
TL;DR
This study validates stapled peptide-based CMA degraders as a powerful strategy to target "undruggable" intracellular drivers, highlighting MAX-7 as a promising therapeutic lead.
Abstract
To target the "undruggable" oncoprotein MYC, we developed MAX-7, an (i, i+7) all-hydrocarbon stapled peptide designed to induce MYC degradation via the chaperone-mediated autophagy (CMA) pathway. Compared to its linear precursor, MAX-7 displays increased α-helicity, enhanced proteolytic stability, and excellent cell permeability. Mechanistically, MAX-7 drives potent, lysosome-dependent depletion of endogenous MYC, bypassing the ubiquitin-proteasome system. Consequently, MAX-7 suppresses proliferation, migration, and invasion while triggering apoptosis in triple-negative breast cancer (TNBC) cells. In vivo, MAX-7 administration achieves significant tumor regression in a 4T1 xenograft model with a favorable biosafety profile. This study validates stapled peptide-based CMA degraders as a powerful strategy to target "undruggable" intracellular drivers, highlighting MAX-7 as a promising therapeutic lead.
KLHL12 is identified as a potentially tumor-selective E3 ligase and the development of the first-in-class KLHL12-recruiting PROTACs are reported, which established KLHL12 as a promising tumor‑selective E3 ligase and provided a KLHL12-recruiting PROTAC platform for cancer therapy.
Shicheng Xu, Xian Zhang, Shun-Bo Hu et al.· Angewandte Chemie· 0 citations
A series of novel CDK4/6 PROTACs based on dalpiciclib incorporating rigid linkers showed potential to overcome acquired resistance to CDK4/6 inhibitors, demonstrating stronger anti-breast cancer activity than dalpiciclib both in vitro and in vivo.
Guoyong Pan, You Li, Jinke Tan et al.· Bioorganic chemistry (Print)· 0 citations
This work describes the design, synthesis, and biological evaluation of a series of JNK1-targeting PROTACs that recruit either CRBN or VHL E3 ligases that demonstrates excellent degradation potency and selectivity for JNK1, highlighting its potential as a valuable chemical probe for EMT-associated pathologies.
Shuhua Ren, Ye Zhang, Rui Hao et al.· Bioorganic chemistry (Print)· 0 citations
Receptor tyrosine kinases (RTKs) are core cancer therapeutic targets, yet their integral membrane localization hinders efficient degradation by traditional ubiquitin-proteasome system (UPS)-based targeted protein degradation (TPD) strategies. Herein, we describe the structure-guided development of p62/SQSTM1-directed a...
Defa Wu, Yongya Wu, Min Zhao et al.· Journal of Medicinal Chemist...· 0 citations
Targeted protein degradation is a potent strategy against intracellular proteins impervious to traditional drugs. We describe a platform reliant on high-throughput cloning and mRNA-based delivery to quickly screen 100s-1000s of modular biological degraders, which we challenge against the high-turnover c-Myc oncoprotein...
C. Ascanelli, Samuel Gilberto, C. Batho et al.· bioRxiv· 0 citations
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