Gene electro-transfer of an improved erythropoietin plasmid in mice and non-human primates

Elena Fattori, Manuela Cappelletti, Immacolata Zampaglione, Carmela Mennuni, Francesco Calvaruso, Mirko Arcuri, Gabriella Rizzuto, Patrizia Costa, Gemma Perretta, Gennaro Ciliberto, Nicola La Monica

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Anemia due to impaired erythropoietin (EPO) production is associated with kidney failure. Recombinant proteins are commonly administered to alleviate the symptoms of this dysfunction, whereas gene therapy approaches envisaging the delivery of EPO genes have been tried in animal models in order to achieve stable and long-lasting EPO protein production. Naked DNA intramuscular injection is a safe approach for gene delivery; however, transduction levels show high inter-individual variability in rodents and very poor efficiency in non-human primates. Transduction can be improved in several animal models by application of electric pulses after DNA injection. Methods: We have designed a modified EPO gene version by changing the EPO leader sequence and optimizing the gene codon usage. This modified gene was electro-injected into mice, rabbits and cynomolgus monkeys to test for protein production and biological effect. Conclusions: The modified EPO gene yields higher levels of circulating transgene product and a more significant biological effect than the wild-type gene in all the species tested, thus showing great potential in clinically developable gene therapy approaches for EPO delivery.

Original languageEnglish
Pages (from-to)228-236
Number of pages9
JournalJournal of Gene Medicine
Volume7
Issue number2
DOIs
Publication statusPublished - Feb 2005

Keywords

  • EPO
  • Gene electro-transfer
  • Primates

ASJC Scopus subject areas

  • Genetics

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