Polydopamine Nanoparticles as a Versatile Molecular Loading Platform to Enable Imaging-guided Cancer Combination...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Combination cancer therapy enhances efficacy and reduces side effects.
• Developing versatile nanocarriers is crucial for advanced cancer treatment.

Purpose of the Study:

• To develop a theranostic nanoplatform for imaging-guided combined chemo- and photothermal cancer therapy.
• To utilize polydopamine nanoparticles as a carrier for simultaneous drug and imaging agent loading.

Main Methods:

• Synthesized polydopamine (PDA) nanoparticles loaded with indocyanine green (ICG), doxorubicin (DOX), and manganese ions (Mn2+).
• Utilized ICG for photothermal therapy and DOX for chemotherapy.
• Employed Mn2+ for T1-weighted magnetic resonance (MR) imaging contrast.
• Evaluated the nanoplatform in a mouse tumor model.

Main Results:

• The PDA-ICG-PEG/DOX(Mn) nanoplatform demonstrated efficient loading of ICG, DOX, and Mn2+.
• ICG exhibited enhanced photostability and red-shifted near-infrared absorbance.
• MR imaging guided combined chemo- and photothermal therapy achieved synergistic therapeutic effects.
• The combination therapy showed significantly improved efficacy compared to single modalities in vivo.

Conclusions:

• PDA nanoparticles serve as a versatile platform for developing theranostic agents.
• The developed nanoplatform enables effective MR imaging-guided chemo- and photothermal cancer therapy.
• This approach offers potential for improved cancer treatment with minimal side effects.