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Therapeutic Gene Delivery and Transfection in Human Pancreatic Cancer Cells using Epidermal Growth Factor Receptor-targeted Gelatin Nanoparticles

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Published on: January 4, 2012

Developing genetically engineered encapsulin protein cage nanoparticles as a targeted delivery nanoplatform.

Hyojin Moon¹, Jisu Lee, Junseon Min

¹Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea.

Biomacromolecules

|September 3, 2014

Summary

Engineered protein cages called encapsulins serve as versatile nanoplatforms for targeted drug delivery. These heat-stable nanoparticles effectively deliver anticancer drugs to liver cancer cells with minimal toxicity.

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Evaluation of Polymeric Gene Delivery Nanoparticles by Nanoparticle Tracking Analysis and High-throughput Flow Cytometry

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Area of Science:

Biomaterials Science
Nanotechnology
Molecular Engineering

Background:

Protein cage nanoparticles offer a robust, well-defined structure for drug delivery applications.
Encapsulin, a protein cage from Thermotoga maritima, exhibits exceptional heat stability and potential for engineering.

Purpose of the Study:

To engineer encapsulin as a versatile nanoplatform for targeted delivery of therapeutic agents.
To demonstrate the functional plasticity of engineered encapsulin for simultaneous incorporation of targeting ligands, diagnostic probes, and drugs.

Main Methods:

Genetic engineering of encapsulin for enhanced heat stability and surface display of targeting ligands.
Chemical conjugation of an anticancer prodrug (Aldoxorubicin) to the engineered encapsulin.
In vitro evaluation of targeted delivery to hepatocellular carcinoma (HCC) cells and drug efficacy using cell viability assays.

Main Results:

Successfully displayed a hepatocellular carcinoma (HCC) targeting peptide (SP94) on engineered encapsulin (Encap_loophis42C123).
Demonstrated effective and selective targeting of SP94-Encap_loophis42C123 to HepG2 cells via fluorescent microscopy.
Achieved comparable anticancer efficacy of loaded Aldoxorubicin (AlDox) from SP94-Encap_loophis42C123 to free drugs, with no observed platform cytotoxicity.

Conclusions:

Engineered encapsulin possesses functional plasticity, enabling the simultaneous integration of targeting, diagnostic, and therapeutic functionalities.
This engineered protein cage nanoplatform holds significant promise for developing advanced multifunctional delivery systems for cancer therapy.