Nanosensitizer-mediated augmentation of sonodynamic therapy efficacy and antitumor immunity

Nat Commun. 2023 Nov 1;14(1):6973. doi: 10.1038/s41467-023-42509-7.

Abstract

The dense stroma of desmoplastic tumor limits nanotherapeutic penetration and hampers the antitumor immune response. Here, we report a denaturation-and-penetration strategy and the use of tin monosulfide nanoparticles (SnSNPs) as nano-sonosensitizers that can overcome the stromal barrier for the management of desmoplastic triple-negative breast cancer (TNBC). SnSNPs possess a narrow bandgap (1.18 eV), allowing for efficient electron (e-)-hole (h+) pair separation to generate reactive oxygen species under US activation. More importantly, SnSNPs display mild photothermal properties that can in situ denature tumor collagen and facilitate deep penetration into the tumor mass upon near-infrared irradiation. This approach significantly enhances sonodynamic therapy (SDT) by SnSNPs and boosts antitumor immunity. In mouse models of malignant TNBC and hepatocellular carcinoma (HCC), the combination of robust SDT and enhanced cytotoxic T lymphocyte infiltration achieves remarkable anti-tumor efficacy. This study presents an innovative approach to enhance SDT and antitumor immunity using the denaturation-and-penetration strategy, offering a potential combined sono-immunotherapy approach for the cancer nanomedicine field.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Carcinoma, Hepatocellular* / therapy
  • Cell Line, Tumor
  • Humans
  • Liver Neoplasms* / therapy
  • Mice
  • Nanoparticles* / therapeutic use
  • Neoplasms* / therapy
  • Reactive Oxygen Species
  • Triple Negative Breast Neoplasms* / therapy
  • Ultrasonic Therapy*

Substances

  • Reactive Oxygen Species