Blockade of HIF-1α and STAT3 by hyaluronate-conjugated TAT-chitosan-SPION nanoparticles loaded with siRNA molecules prevents tumor growth

Nanomedicine. 2021 Jun:34:102373. doi: 10.1016/j.nano.2021.102373. Epub 2021 Mar 3.

Abstract

HIF-1α and STAT3 are two of the critical factors in the growth, proliferation, and metastasis of cancer cells and play a crucial role in inhibiting anti-cancer immune responses. Therefore, we used superparamagnetic iron oxide (SPION) nanoparticles (NPs) coated with thiolated chitosan (ChT) and trimethyl chitosan (TMC) and functionalized with hyaluronate (H) and TAT peptide for delivery of siRNA molecules against STAT3 and HIF-1α to cancer cells both in vivo and in vitro. The results indicated that tumor cell transfection with siRNA-encapsulated NPs robustly inhibited proliferation and migration and induced apoptosis in tumor cells. Furthermore, simultaneous silencing of HIF-1α and STAT3 significantly repressed cancer development in two different tumor types (4T1 breast cancer and CT26 colon cancer) which were associated with upregulation of cytotoxic T lymphocytes and IFN-γ secretion. The findings suggest inhibiting the HIF-1α/STAT3 axis by SPION-TMC-ChT-TAT-H NPs as an effective way to treat cancer.

Keywords: Chitosan; Hyaluronate; Hypoxia inducible factor; Nanoparticle; SPION; STAT3.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Breast Neoplasms / pathology*
  • Cell Line, Tumor
  • Cell Proliferation*
  • Chitosan / chemistry*
  • Colonic Neoplasms / pathology*
  • Female
  • Humans
  • Hyaluronic Acid / chemistry*
  • Hypoxia-Inducible Factor 1, alpha Subunit / antagonists & inhibitors*
  • Magnetic Iron Oxide Nanoparticles / administration & dosage*
  • Magnetic Iron Oxide Nanoparticles / chemistry
  • Mice
  • Mice, Inbred BALB C
  • RNA, Small Interfering / administration & dosage*
  • STAT3 Transcription Factor / antagonists & inhibitors*

Substances

  • HIF1A protein, human
  • Hypoxia-Inducible Factor 1, alpha Subunit
  • RNA, Small Interfering
  • STAT3 Transcription Factor
  • STAT3 protein, human
  • Hyaluronic Acid
  • Chitosan