Tumor-targeted responsive nanoparticle-based systems for magnetic resonance imaging and therapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Developing targeted drug delivery systems is crucial for effective cancer therapy.
• Nanoparticles offer potential for enhanced imaging and treatment modalities.

Purpose of the Study:

• To design and synthesize a tumor-responsive nanoparticle system for simultaneous cancer imaging and treatment.
• To create a multifunctional platform integrating diagnostics and therapeutics.

Main Methods:

• Synthesized manganese oxide nanoparticles (Mn3O4 NPs) and nanostructured lipid carriers (NLCs).
• Modified NPs with targeting moieties (LHRH peptide, anti-melanoma antibodies) and MMP2 cleavable peptide.
• Entrapped BRAF inhibitor (vemurafenib) in NLCs for enhanced cytotoxicity.
• Evaluated nanoparticle stability, drug entrapment, cytotoxicity, and genotoxicity in vitro.
• Assessed in vivo MRI signal enhancement and biodistribution in mouse cancer models.

Main Results:

• Uniform, stable, cancer-targeted nanoparticles (PEGylated Mn3O4 NPs and NLCs) were successfully synthesized.
• Nanoparticles without drugs showed no cytotoxicity or genotoxicity.
• Vemurafenib-loaded nanoparticles significantly enhanced toxicity in cancer cells with V600E mutation.
• Targeted nanoparticles accumulated preferentially in tumors, enhancing MRI signals in melanoma, lung, and ovarian cancer models.

Conclusions:

• The developed nanoparticle systems form a basis for integrated MRI diagnostic and therapeutic approaches.
• This platform holds potential for multimodal cancer management.