Glycopolymer-Cell-Penetrating Peptide (CPP) Conjugates for Efficient Epidermal Growth Factor Receptor (EGFR)
Yi-Yang Peng1, Haimei Hu2,3, Diana Diaz-Dussan1
1Department of Chemical & Materials Engineering, University of Alberta, Edmonton T6G 1H9, Alberta Canada.
ACS Macro Letters
|May 16, 2022
Summary
This study developed novel galactose-based glycopolymer-peptide nanoparticles for enhanced siRNA delivery. These nanoparticles effectively silenced epidermal growth factor receptor (EGFR) in cervical cancer cells, showing promise for cancer therapy.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Cancer Therapeutics
Background:
- Overexpression of epidermal growth factor receptor (EGFR) drives various cancers, including cervical carcinoma.
- Short interfering RNA (siRNA) offers a strategy to regulate EGFR expression for cancer management.
- Existing cell-penetrating peptides (CPPs) enhance siRNA uptake but struggle with endosomal entrapment, limiting knockdown efficiency.
Purpose of the Study:
- To develop novel glycopolymer-peptide nanoparticles for efficient siRNA delivery and endosomal escape.
- To investigate the potential of these nanoparticles for targeted EGFR silencing in cervical cancer.
- To evaluate the efficacy and specificity of the developed siRNA delivery system compared to commercial alternatives.
Main Methods:
- Synthesis of galactose-based aldehyde-containing polymers (P2, P3, P4) via RAFT polymerization.
- Conjugation of an arginine-rich peptide (ARP) to polymers using Schiff base reaction, forming glycopolymer-peptide conjugates.
- Preparation of multivalent CPP polyplexes by condensing siRNA with the conjugates.
- Evaluation of cellular internalization using FITC-labeled siRNA in HeLa cells.
- Assessment of EGFR silencing efficiency and off-targeting effects in vitro.
Main Results:
- The glycopolymer-peptide conjugates successfully formed polyplexes with siRNA, enhancing cellular internalization and endosomal escape.
- Statistical glycopolymer-peptide (P3-P) polyplexes demonstrated superior EGFR silencing efficiency in HeLa cells.
- P3-P polyplexes exhibited reduced off-targeting effects compared to Lipofectamine 3000.
- The study confirmed enhanced cytoplasmic localization of polyplexes.
Conclusions:
- Galactose-based glycopolymer-peptide nanoparticles are effective carriers for siRNA delivery.
- The developed system shows significant potential for targeted EGFR silencing in cervical cancer therapy.
- This approach offers a promising strategy for improving siRNA delivery efficiency and specificity in cancer treatment.
