Targeted polyethylenimine/(p53 plasmid) nanocomplexes for potential antitumor applications

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Research

Background:

• Nanocarrier development is crucial for targeted gene delivery to tumors and minimizing toxicity.
• Folic acid (FA) receptors are overexpressed on many tumor cells, presenting a target for cancer therapies.

Purpose of the Study:

• To synthesize and characterize a novel PEI-FITC-FA polymer for creating targeted nanocomplexes.
• To evaluate the efficacy of these nanocomplexes for delivering tumor suppressor genes (pp53) into tumor cells.
• To assess the potential of FA-targeted nanocomplexes for inducing tumor cell apoptosis.

Main Methods:

• Synthesis of polyethyleneimine-fluorescein isothiocyanate-folic acid (PEI-FITC-FA) polymer.
• Condensation of pp53 with PEI-FITC-FA to form targeted nanocomplexes.
• Characterization of nanocomplex physical properties (e.g., size).
• In vitro evaluation of nanocomplex uptake by tumor cells overexpressing FA receptors.
• Assessment of pp53 gene delivery and induction of tumor cell apoptosis.

Main Results:

• PEI-FITC-FA/pp53 nanocomplexes were successfully synthesized with a size <100 nm.
• Nanocomplexes demonstrated enhanced permeability and retention (EPR) effect and targeted tumor cells via FA receptors.
• FA facilitated selective recognition and increased tumor cell uptake through time- and concentration-dependent internalization.
• Efficient delivery of pp53 into tumor cells was achieved, leading to significant tumor cell apoptosis.

Conclusions:

• The targeted PEI-FITC-FA polymer serves as an effective nanocarrier for gene delivery.
• FA-mediated targeting significantly enhances nanocomplex accumulation and uptake in tumor cells.
• These targeted nanocomplexes hold promise for developing advanced cancer gene therapy strategies.