Nanogel-Carbon Dot Conjugates: A Synergistic Approach for Enhanced Cancer Treatment through Combination Therapy

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cancer Therapy

Background:

• Development of novel nanocarriers is crucial for advanced drug delivery.
• Existing nanocarriers have limitations that necessitate improved designs.
• Targeted delivery systems are essential for enhancing therapeutic efficacy and reducing side effects.

Purpose of the Study:

• To develop a novel nanoconjugate (NG-FACD) by combining a nanogel and folic acid-functionalized carbon dots.
• To evaluate the potential of NG-FACD for selective bioimaging and targeted combination therapy.
• To assess the synergistic therapeutic effects of riboflavin and paclitaxel loaded onto the NG-FACD system.

Main Methods:

• Fabrication of a positively charged nanogel (NG) from a peptide amphiphilic hydrogelator.
• Functionalization of blue-emitting carbon dots (FACD) with folic acid.
• Electrostatic binding of NG and FACD to form the NG-FACD nanoconjugate.
• Evaluation of drug loading capacity and cytotoxicity against folate receptor-positive (FR+) and negative cells.

Main Results:

• NG-FACD demonstrated enhanced loading of riboflavin (RbF) and paclitaxel (PTX) compared to individual carriers.
• NG-FACD exhibited significantly higher cytotoxicity against FR+ B16F10 cells compared to individual drug-loaded nanocarriers.
• Concurrent RbF and PTX on NG-FACD showed synergistic effects, leading to substantially higher cytotoxicity than single-drug carriers and free drugs.

Conclusions:

• The novel NG-FACD nanoconjugate effectively targets folate receptor-positive cells.
• NG-FACD facilitates enhanced combination therapy through synergistic photodynamic and chemotherapeutic effects.
• This nanoconjugate holds promise for improved targeted cancer treatment strategies.