Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (7): 20260017.doi: 10.7503/cjcu20260017

• Chemical Biology • Previous Articles     Next Articles

High-internalization-efficiency Aptamer-based LYTACs Chimera for Enhanced Degradation of Leukemia Cell Membrane Proteins

CHEN Zhuoran, GONG Lingyu, AI Lili, ZHANG Peng, ZHOU Yanhua()   

  1. Center for Tissue Engineering and Stem Cell Research,Guizhou Biomanufacturing Laboratory,Key Laboratory of Functional Nucleic Acids?Based Biopharmaceutical Research,Guizhou Medical University,Guiyang 561108,China
  • Received:2026-01-08 Online:2026-07-10 Published:2026-03-25
  • Contact: ZHOU Yanhua E-mail:zhouyanhua@gmc.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(81960036,22564008);the Scientific and Technological Fund Program of Guizhou Provincial Health Commission, China(gzwkj2021-157,2024GZWJKJXM0466);the Higher Education Institutions Scientific and Technological Innovation Team of Guizhou Province, China(qianjiaoji2023-068)

Abstract:

In this study, we developed a novel bifunctional lysosome-targeting chimera(LYTAC), designated HG9-10-tri, by covalently conjugating tri-GalNAc(a lysosome-trafficking ligand) to HG9, an aptamer that binds transferrin receptor 1(TfR1/CD71) with high affinity and internalization efficiency. This chimeric molecule was designed to achieve potent and selective degradation of CD71. Following the optimization of the linker length between HG9 and tri-GalNAc, we demonstrated that HG9-10-tri retains unaltered stability and binding affinity for human acute monocytic leukemia(MV4-11) cells while specifically recognizing acute myeloid leukemia(AML) cell lines. Mechanistically, HG9-10-tri engages the asialoglycoprotein receptor(ASGPR) to trigger endocytosis and lysosomal trafficking, resulting in significant downregulation of cell surface CD71 protein levels in a time- and concentration- dependent manner. Functionally, CD71 degradation suppressed MV4-11 cell viability, induced apoptosis, and triggered G1 phase cell cycle arrest. Collectively, these findings establish HG9-10-tri as a promising therapeutic strategy for CD71-overexpressing acute myeloid leukemia.

Key words: CD71, Cell membrane degradation, Lysosome-targeting chimera(LYTACs), Aptamer, Triacetylgalactosamine(tri-GalNAc)

CLC Number: 

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