Framework nucleic acid-based nanoparticles enhance temozolomide sensitivity in glioblastoma

Drug Resist Updat. 2024 Sep:76:101122. doi: 10.1016/j.drup.2024.101122. Epub 2024 Jul 27.

Abstract

O6-methylguanine DNA methyltransferase (MGMT) is a crucial determinant of temozolomide (TMZ) sensitivity in patients with glioblastoma (GBM). The therapeutic potential of small interfering RNA (siRNA) targeting MGMT to enhance TMZ sensitivity has been hampered by serum nuclease degradation, off-target effects, poor accumulation at tumor sites, and low circulation in blood stream. In this study, we developed a framework nucleic acid-based nanoparticles (FNN), which is constructed from a six-helix DNA bundle, to encapsulate and protect siMGMT for improving TMZ sensitivity in GBM treatment. For better blood-brain barrier (BBB) penetration and GBM targeting, we conjugated Angiopep-2 (ANG) targeting modules to each end of the FNN. Nucleolin (NCL)-responsive locks were engineered along the sides of the six-helix DNA bundle, which safeguard siMGMT before tumor entry. Upon interaction with tumor-overexpressed NCL, these locks unlock, exposing siMGMT, this allows for effective suppression of MGMT, resulting in a significant improvement of TMZ therapeutic efficacy in GBM. This innovative strategy has the potential to transform the current treatment landscape for GBM.

Keywords: DNA framework; DNA nanotechnology; Glioblastoma; SiRNA; Temozolomide sensitivity.

MeSH terms

  • Animals
  • Antineoplastic Agents, Alkylating* / pharmacology
  • Antineoplastic Agents, Alkylating* / therapeutic use
  • Blood-Brain Barrier* / drug effects
  • Blood-Brain Barrier* / metabolism
  • Brain Neoplasms* / drug therapy
  • Brain Neoplasms* / genetics
  • Brain Neoplasms* / pathology
  • Cell Line, Tumor
  • DNA Modification Methylases / metabolism
  • DNA Repair Enzymes / genetics
  • DNA Repair Enzymes / metabolism
  • Drug Resistance, Neoplasm / drug effects
  • Glioblastoma* / drug therapy
  • Glioblastoma* / pathology
  • Humans
  • Nanoparticles* / chemistry
  • Nucleic Acids
  • Nucleolin
  • Peptides
  • Phosphoproteins / metabolism
  • RNA, Small Interfering / administration & dosage
  • RNA-Binding Proteins / metabolism
  • Temozolomide* / administration & dosage
  • Temozolomide* / pharmacology
  • Temozolomide* / therapeutic use
  • Tumor Suppressor Proteins / genetics
  • Tumor Suppressor Proteins / metabolism

Substances

  • Temozolomide
  • Antineoplastic Agents, Alkylating
  • Angiopep-2
  • RNA-Binding Proteins
  • DNA Repair Enzymes
  • DNA Modification Methylases
  • Nucleolin
  • Phosphoproteins
  • Tumor Suppressor Proteins
  • RNA, Small Interfering
  • MGMT protein, human
  • Nucleic Acids
  • Peptides