Developing a Novel Gene-Delivery Vector System Using the Recombinant Fusion Protein of Pseudomonas Exotoxin A and Hyperthermophilic Archaeal Histone HPhA

PLoS One. 2015 Nov 10;10(11):e0142558. doi: 10.1371/journal.pone.0142558. eCollection 2015.

Abstract

Non-viral gene delivery system with many advantages has a great potential for the future of gene therapy. One inherent obstacle of such approach is the uptake by endocytosis into vesicular compartments. Receptor-mediated gene delivery method holds promise to overcome this obstacle. In this study, we developed a receptor-mediated gene delivery system based on a combination of the Pseudomonas exotoxin A (PE), which has a receptor binding and membrane translocation domain, and the hyperthermophilic archaeal histone (HPhA), which has the DNA binding ability. First, we constructed and expressed the rPE-HPhA fusion protein. We then examined the cytotoxicity and the DNA binding ability of rPE-HPhA. We further assessed the efficiency of transfection of the pEGF-C1 plasmid DNA to CHO cells by the rPE-HPhA system, in comparison to the cationic liposome method. The results showed that the transfection efficiency of rPE-HPhA was higher than that of cationic liposomes. In addition, the rPE-HPhA gene delivery system is non-specific to DNA sequence, topology or targeted cell type. Thus, the rPE-HPhA system can be used for delivering genes of interest into mammalian cells and has great potential to be applied for gene therapy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • ADP Ribose Transferases / chemistry
  • ADP Ribose Transferases / genetics*
  • Animals
  • Archaeal Proteins / chemistry
  • Archaeal Proteins / genetics*
  • Bacterial Toxins / chemistry
  • Bacterial Toxins / genetics*
  • CHO Cells
  • Cricetulus
  • DNA, Recombinant / genetics
  • Exotoxins / chemistry
  • Exotoxins / genetics*
  • Gene Transfer Techniques*
  • Genetic Therapy
  • Genetic Vectors*
  • HeLa Cells
  • Histones / chemistry
  • Histones / genetics*
  • Humans
  • Liposomes
  • Pseudomonas aeruginosa Exotoxin A
  • Pyrococcus horikoshii / genetics
  • Recombinant Fusion Proteins / chemistry
  • Recombinant Fusion Proteins / genetics
  • Transfection / methods
  • Virulence Factors / chemistry
  • Virulence Factors / genetics*

Substances

  • Archaeal Proteins
  • Bacterial Toxins
  • DNA, Recombinant
  • Exotoxins
  • Histones
  • Liposomes
  • Recombinant Fusion Proteins
  • Virulence Factors
  • ADP Ribose Transferases

Grants and funding

This work was supported by the National Nature Science Foundation of China (http://www.nsfc.gov.cn), Grant numbers: 81370712 (XD) and 31172165 (GLZ). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.