Multifunctional particles for melanoma-targeted drug delivery

Area of Science:

• Biomaterials Science
• Nanotechnology
• Oncology

Background:

• Melanoma treatment faces challenges with drug delivery and targeting.
• Developing multifunctional nanoparticles can improve therapeutic efficacy.
• Targeted delivery systems are crucial for reducing systemic toxicity of chemotherapeutics.

Purpose of the Study:

• To develop novel magnetic-based core-shell particles (MBCSPs) for targeted melanoma therapy.
• To engineer MBCSPs with dual drug release and dual targeting capabilities.
• To evaluate the in vitro and in vivo performance of MBCSPs for melanoma treatment and monitoring.

Main Methods:

• Fabrication of core-shell nanoparticles with a poly(lactic-co-glycolic acid) core and a thermo-responsive shell.
• Conjugation of Gly-Arg-Gly-Asp-Ser (GRGDS) peptides for melanoma cell targeting.
• In vitro cytotoxicity assays, drug release studies (curcumin and doxorubicin), and MRI contrast assessment.
• In vivo studies using a B16F10 melanoma mouse model to assess particle accumulation at the tumor site.

Main Results:

• GRGDS-conjugated MBCSPs demonstrated an average diameter of 296 nm with no cytotoxicity to human dermal fibroblasts.
• Dual drug release mechanisms were observed: sustained release from the core and temperature-dependent release from the shell.
• Particles showed magnetic resonance imaging contrast and significant accumulation at the tumor site in vivo, enhanced by an external magnet.
• Successful targeting of melanoma cells via receptor-mediated binding (GRGDS to α(5)β(3) receptors) and magnetic localization.

Conclusions:

• MBCSPs represent a promising platform technology for targeted melanoma drug delivery.
• The multifunctional nature of MBCSPs allows for controlled drug release and effective tumor targeting.
• These particles hold potential for improving melanoma treatment outcomes and reducing chemotherapy side effects.