Reshaping Prostate Tumor Microenvironment to Suppress Metastasis via Cancer-Associated Fibroblast Inactivation with Peptide-Assembly-Based Nanosystem

Jiayan Lang, Xiao Zhao, Yingqiu Qi, Yinlong Zhang, Xuexiang Han, Yanping Ding, Jiajing Guan, Tianjiao Ji, Ying Zhao, Guangjun Nie

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Prostate cancer is one of the most common malignant tumors in men, and inhibiting metastasis is a key event but still a major challenge in prostate cancer treatment. Cancer-associated fibroblasts (CAFs) play an important role in prostate tumor metastasis by shaping the malignant tumor microenvironment. Herein, we constructed a CAF-targeting siRNA delivery system by loading the fibroblast activation protein-α (FAP-α) antibody onto the cell-penetrating peptide (CPP)-based nanoparticles, which specifically downregulated C-X-C motif chemokine ligand 12 (CXCL12) expression in CAFs. This regulation generated a series of changes through inactivating CAFs so that the malignant prostate tumor microenvironment was reshaped. The tumor cell invasion, migration, and tumor angiogenesis were significantly inhibited, which all contributed to the suppression of the metastasis of an orthotopic prostate tumor. This tumor microenvironment reshaping strategy via CAF targeting and inactivation provides an alternative approach for malignant prostate tumor metastasis inhibition.

Original languageEnglish (US)
Pages (from-to)12357-12371
Number of pages15
JournalACS Nano
Volume13
Issue number11
DOIs
StatePublished - Nov 26 2019

Keywords

  • CXCL12 gene silencing
  • cancer-associated fibroblast inactivation
  • metastasis inhibition
  • peptide assembly
  • prostate cancer

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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