Multimodal layer-by-layer nanoparticles: a breakthrough in gene and drug delivery for osteosarcoma

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Osteosarcoma is a common, aggressive bone cancer in children and adolescents.
• Current treatments face limitations due to metastasis, drug resistance, and side effects.
• Novel therapeutic strategies are urgently needed for effective osteosarcoma management.

Purpose of the Study:

• To develop and evaluate novel nanoparticles for co-delivery of miRNA-34a and chemotherapeutic drugs for osteosarcoma treatment.
• To assess the efficacy of these nanoparticles in vitro using 2D and 3D cell culture models.
• To investigate the potential of a layer-by-layer nanocoating to enhance therapeutic delivery.

Main Methods:

• Fabrication of biodegradable chitosan-PLGA nanoparticles loaded with miRNA-34a, doxorubicin, and resveratrol.
• Application of a pectin-chitosan bilayer nanocoating using a layer-by-layer technique.
• In vitro assessment of nanoparticle efficacy on U2OS and Saos-2 osteosarcoma cells in 2D and 3D spheroid models, evaluating cell viability, metabolic activity, and apoptosis.

Main Results:

• Nanoparticles co-delivering miRNA-34a and drugs significantly increased apoptotic activity in osteosarcoma cells.
• The layer-by-layer nanocoated nanoparticles demonstrated enhanced disruption of cellular functions.
• PCR analysis confirmed the effectiveness of the combined therapeutic approach.

Conclusions:

• Biodegradable nanoparticles offer a promising platform for co-delivering therapeutic agents in osteosarcoma.
• The developed nanocoated system shows potential for improving treatment efficacy and overcoming drug resistance.
• This approach represents a significant advancement in targeted gene and drug delivery for osteosarcoma therapy.