Advancing Breast Cancer Therapeutics: Targeted Gene Delivery Systems Unveiling the Potential of Estrogen...

Area of Science:

• Biochemistry
• Molecular Biology
• Nanotechnology

Background:

• Curcumin is a phytochemical known to inhibit tumor promotion.
• Its potential as a targeting ligand in drug delivery systems remains unexplored.
• Estrogen receptors are implicated in breast cancer progression.

Purpose of the Study:

• To evaluate the tumor-targeting efficiency of curcumin and its derivatives.
• To develop a polymer-based gene therapy system utilizing curcumin derivatives.
• To assess the in vitro and in vivo antitumor effects of the developed system.

Main Methods:

• Synthesized dextran grafted with branched polyethylenimine as a gene carrier backbone.
• Linked curcumin and its derivatives (phenylalanine, cinnamic acid, coumaric acid, ferulic acid) to lysine dendrimers.
• Evaluated DNA binding, nuclease protection, gene transfection efficiency, and antitumor effects using plasmid DNA expressing anti-bcl-2 short hairpin RNA in MCF-7 and SKBr3 cells.

Main Results:

• Curcumin demonstrated high affinity for estrogen receptors in MCF-7 cells.
• Synthesized gene carriers exhibited excellent DNA binding, nuclease protection, and transfection efficiency.
• Curcumin and 17α-estradiol preincubation dose-dependently decreased gene transfer efficiency, indicating targeting specificity.

Conclusions:

• Curcumin and its derivatives show potential as novel targeting ligands for tumor cells and tissues.
• The developed polymer-based gene therapy system effectively delivered anti-bcl-2 short hairpin RNA.
• This approach offers a promising strategy for targeted cancer therapy.