Related Experiment Video

Updated: Jul 2, 2026

Therapeutic Gene Delivery and Transfection in Human Pancreatic Cancer Cells using Epidermal Growth Factor Receptor-targeted Gelatin Nanoparticles
08:35

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

Published on: January 4, 2012

A novel receptor-targeted gene delivery system for cancer gene therapy

P Tian1, S Ren, C Ren

  • 1Shanghai Cancer Insititute, China.

Science in China. Series C, Life Sciences
|August 30, 2008
PubMed

Insights

Researchers developed a novel polypeptide conjugate system to deliver genes specifically to cancer cells. This system targets over-expressed growth factor receptors, enhancing gene therapy efficacy in various cancer types both in vitro and in vivo.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Cancer Research

Background:

  • Over-expression of growth factor receptors like IGF I R, IGF II R, and EGF R is common in diverse human cancers.
  • Targeted gene delivery systems are crucial for effective cancer gene therapy.

Purpose of the Study:

  • To design and synthesize a polypeptide conjugate gene delivery system for targeted delivery to cancer cells.
  • To evaluate the efficiency and expression of the gene delivery system in vitro and in vivo.

Main Methods:

  • A polypeptide conjugate system was synthesized, comprising a ligand oligopeptide (LOP) for receptor recognition, a polycationic polypeptide (PCP) for DNA binding, and an endosome-releasing oligopeptide (EROP).
  • Specific LOPs (E5 for IGF I R/II R, GE7 for EGF R) were designed and conjugated with PCP and EROP.
  • The system's ability to form stable complexes with plasmid DNA (pSVbeta-gal reporter gene) was assessed.
  • Gene delivery efficiency and expression were evaluated in human cancer cells in vitro and in implanted tumors in nude mice.

Main Results:

  • The LOP-PCP-EROP conjugate systems (E5-PCP/DNA/PCP-HA20 and GE7-PCP/DNA/PCP-HA20) efficiently complexed with plasmid DNA.
  • The system demonstrated high efficiency in targeting exogenous genes to various human cancer cell types.
  • Transduced genes showed high expression levels in cancer cells both in vitro and in vivo.

Conclusions:

  • The developed polypeptide conjugate system is an effective vehicle for targeted gene delivery to cancer cells.
  • This novel system holds promise for advancing cancer gene therapy strategies.
  • Targeting over-expressed growth factor receptors enhances gene delivery and expression in cancer cells.

More Related Videos

A Nonviral Approach to Generate Transient Chimeric Antigen Receptor T Cells Using mRNA for Cancer Immunotherapy09:56

A Nonviral Approach to Generate Transient Chimeric Antigen Receptor T Cells Using mRNA for Cancer Immunotherapy

Published on: February 21, 2025

An Orthotopic Bladder Cancer Model for Gene Delivery Studies07:48

An Orthotopic Bladder Cancer Model for Gene Delivery Studies

Published on: December 1, 2013

Related Concept Videos

Gene Therapy00:59

Gene Therapy

Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be inserted. The...
Gene Therapy00:59

Gene Therapy

Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be inserted. The...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.