PMID- 38157218 OWN - NLM STAT- MEDLINE DCOM- 20240117 LR - 20240117 IS - 1936-086X (Electronic) IS - 1936-0851 (Linking) VI - 18 IP - 2 DP - 2024 Jan 16 TI - Targeted Degradation of Signal Transduction and Activator of Transcription 3 by Chaperone-Mediated Autophagy Targeting Chimeric Nanoplatform. PG - 1599-1610 LID - 10.1021/acsnano.3c09536 [doi] AB - Chaperone-mediated autophagy (CMA) is a lysosomal-dependent proteolysis pathway for the degradation of cytosolic proteins. However, exploiting CMA-mediated proteolysis to degrade proteins of interest in cancer therapy has not been widely applied. In this study, we develop a CMA-targeting chimera (CMATAC) to efficiently and specifically degrade signal transduction and activator of transcription 3 (STAT3) in tumor cells. CMATAC consists of STAT3 and heat shock cognate 70 kDa protein (HSC70) targeting peptides connected by a linker. To efficiently deliver CMATACs into tumor cells, lipid nanoparticles (LNPs) are used to encapsulate CMATACs (nCMATACs) and decorated with an insulin-like growth factor 2 receptor (IGF2R) targeting peptide (InCMATACs) to achieve tumor targeting and precise delivery. The CMA pathway is activated in tumor cells by a fasting-mimicking diet (FMD). Furthermore, FMD treatment strongly enhances the cellular uptake and tumor accumulation of InCMATACs by upregulating the IGF2R expression. As a result, InCMATACs efficiently degrade STAT3 protein in both A549 and HCC827 tumor cells and inhibit tumor growths in vivo. This study demonstrates that InCMATACs can be used for selective proteolysis in cancer therapy. FAU - Song, Haohao AU - Song H AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - Henan Institutes of Advanced Technology, Zhengzhou University, Zhengzhou 450052, China. FAU - Huang, Wenping AU - Huang W AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Jia, Fuhao AU - Jia F AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Wang, Zhihang AU - Wang Z AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Zhang, Jie AU - Zhang J AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Qian, Ruihao AU - Qian R AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Nie, Gungjun AU - Nie G AUID- ORCID: 0000-0001-5040-9793 AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. FAU - Wang, Hai AU - Wang H AUID- ORCID: 0000-0002-1292-998X AD - CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China. AD - University of Chinese Academy of Sciences, Beijing 100049, China. LA - eng PT - Journal Article DEP - 20231229 PL - United States TA - ACS Nano JT - ACS nano JID - 101313589 RN - 0 (HSC70 Heat-Shock Proteins) RN - 0 (Peptides) SB - IM MH - Humans MH - *Chaperone-Mediated Autophagy MH - Autophagy MH - *Neoplasms/metabolism MH - Proteolysis MH - HSC70 Heat-Shock Proteins/metabolism MH - Peptides/metabolism MH - Signal Transduction MH - Lysosomes/metabolism OTO - NOTNLM OT - STAT3 OT - chaperone-mediated autophagy OT - lipid nanoparticles OT - protein degradation OT - targeted delivery EDAT- 2024/01/02 11:42 MHDA- 2024/01/17 06:42 CRDT- 2023/12/29 11:33 PHST- 2024/01/17 06:42 [medline] PHST- 2024/01/02 11:42 [pubmed] PHST- 2023/12/29 11:33 [entrez] AID - 10.1021/acsnano.3c09536 [doi] PST - ppublish SO - ACS Nano. 2024 Jan 16;18(2):1599-1610. doi: 10.1021/acsnano.3c09536. Epub 2023 Dec 29.