Degradation of dual proteins induced by “power train”
- 1Key Laboratory of Biomedical Analytics (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China
- 2The Pharmacy Department of the Second Hospital of Chongqing Medical University, Chongqing, 400010, China; Corresponding author.
- 3Key Laboratory of Biomedical Analytics (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China; Corresponding author.
Abstract
Targeted degradation of multiple oncogenic membrane proteins remains challenging due to inefficient lysosomal trafficking and off-target effects, which limits the application of current monovalent aptamer systems. To improve delivery efficiency and degradation efficacy, we developed a specific multivalent network “power train” probe based on rolling circle amplification (RCA) and lysosome-targeting chimera (LYTAC). The probe integrates three functional aptamers: cation-independent mannose-6-phosphate receptor (CI-M6PR) aptamer, responsible for lysosomal trafficking, functions as the “locomotive”; AS1411, which targets nucleolin (NCL), and Sgc8c, which binds to protein tyrosine kinase 7 (PTK7), act as the “carriages”. This tri-aptamer configuration enables simultaneous degradation of both NCL and PTK7. Compared with linear probes, the efficiency of protein degradation is increased by 1.5–1.7 fold, and the enhancement of its cytotoxicity is significantly increased by 4.7–5.8 fold. This network structure's structure significantly improves binding affinity (the affinity of the network structure is 6.1–6.3 fold higher than that of monovalent aptamers) while enhancing lysosomal degradation efficiency. Removal of any single functional unit will reduce the efficacy of the probe. This “power train” exerts tumor-selective cytotoxicity through dual oncoprotein degradation by coordinately regulating CI-M6PR-mediated lysosomal targeting, AS1411-mediated NCL degradation, and Sgc8c-induced PTK7 degradation, thereby inducing apoptosis and inhibiting proliferation and migration of tumor cells.
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BibTeX
@article{liang2026degradation,
title = {{Degradation of dual proteins induced by “power train”}},
author = {Rui Liang and Kunhan Nie and Beibei Lou and Lin Liu and Xiaoqiao Wu and Chun Tian and Hui Liu and Chengzhi Huang and Di Li and Chunmei Li},
journal = {Journal of Pharmaceutical Analysis},
year = {2026},
month = oct,
doi = {10.1016/j.jpha.2026.101639},
url = {https://doi.org/10.1016/j.jpha.2026.101639},
note = {CC BY},
}
RIS
TY - JOUR
TI - Degradation of dual proteins induced by “power train”
AU - Rui Liang
AU - Kunhan Nie
AU - Beibei Lou
AU - Lin Liu
AU - Xiaoqiao Wu
AU - Chun Tian
AU - Hui Liu
AU - Chengzhi Huang
AU - Di Li
AU - Chunmei Li
PY - 2026
DA - 2026/10/31
JO - Journal of Pharmaceutical Analysis
DO - 10.1016/j.jpha.2026.101639
UR - https://doi.org/10.1016/j.jpha.2026.101639
AB - Targeted degradation of multiple oncogenic membrane proteins remains challenging due to inefficient lysosomal trafficking and off-target effects, which limits the application of current monovalent aptamer systems. To improve delivery efficiency and degradation efficacy, we developed a specific multivalent network “power train” probe based on rolling circle amplification (RCA) and lysosome-targeting chimera (LYTAC). The probe integrates three functional aptamers: cation-independent mannose-6-phosphate receptor (CI-M6PR) aptamer, responsible for lysosomal trafficking, functions as the “locomotive”; AS1411, which targets nucleolin (NCL), and Sgc8c, which binds to protein tyrosine kinase 7 (PTK7), act as the “carriages”. This tri-aptamer configuration enables simultaneous degradation of both NCL and PTK7. Compared with linear probes, the efficiency of protein degradation is increased by 1.5–1.7 fold, and the enhancement of its cytotoxicity is significantly increased by 4.7–5.8 fold. This network structure's structure significantly improves binding affinity (the affinity of the network structure is 6.1–6.3 fold higher than that of monovalent aptamers) while enhancing lysosomal degradation efficiency. Removal of any single functional unit will reduce the efficacy of the probe. This “power train” exerts tumor-selective cytotoxicity through dual oncoprotein degradation by coordinately regulating CI-M6PR-mediated lysosomal targeting, AS1411-mediated NCL degradation, and Sgc8c-induced PTK7 degradation, thereby inducing apoptosis and inhibiting proliferation and migration of tumor cells.
SN - 2095-1779
SN - 2214-0883
ER -