Augmented glioma-targeted theranostics using multifunctional polymer-coated carbon nanodots.

Area of Science:

• Nanomedicine
• Biotechnology
• Oncology

Background:

• Overcoming biological barriers like the blood-brain barrier (BBB) is crucial for effective site-specific drug delivery in nanomedicine.
• Targeted delivery of therapeutics to brain tumors remains a significant challenge in cancer treatment.

Purpose of the Study:

• To design and synthesize multifunctional polymer-coated carbon nanodots (pCDPI) for imaging-guided, targeted drug delivery across the BBB.
• To evaluate the efficacy of pCDPI in overcoming biological barriers and treating orthotopic glioma in mice.

Main Methods:

• Preparation of polymer-coated carbon nanodots functionalized with an interleukin-6 (IL-6) fragment peptide (pCDPI).
• In vitro and in vivo studies to assess pCDPI's ability to cross the BBB and penetrate glioma.
• Evaluation of IL-6 inhibition, doxorubicin (DOX) release, and fluorescence monitoring for targeted cancer therapy.

Main Results:

• pCDPI demonstrated small hydrodynamic diameters, high water solubility, and excellent biocompatibility.
• pCDPI successfully penetrated the BBB and reached orthotopic glioma in mice.
• Effective inhibition of IL-6-induced glioma cell proliferation and pH-sensitive, sustained release of doxorubicin (DOX) were achieved.

Conclusions:

• The developed pCDPI nanomedicine shows significant potential for overcoming biological barriers for targeted brain tumor therapy.
• The combination of imaging guidance, targeted delivery, and synergistic drug release offers a promising approach for future cancer treatments.