Evaluation of peptide-mediated transduction in human CD34+ cells

Hongmei Shen, Jeffrey C. Mai, Lu Qiu, Shaonan Cao, Paul D. Robbins, Tao Cheng

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Protein transduction domains (PTDs) have been used increasingly to deliver biologically active agents to a variety of cell types in vitro and in vivo. To define the most effective PTDs for transducing hematopoietic cells, we have screened a panel of PTD peptides in human CD34+ cells for delivery of a 60-kd marker protein and assessed its impact on phenotypic maintanence in vitro. Compared to the HIV-TAT peptide, most peptide complexes displayed high efficiency in transducing the CD34+ cells, except for those based on shorter peptides (4R, 4K, and 5RQ). In particular, the arginine homopolymers including 8R, 10R, and 12R, were internalized by the cells to a greater extent than the other PTDs. Transduction was significantly potentiated by preincubation of cells with dextran sulfate. Importantly, colony forming ability and CD34+CD38- primitive phenotype were not significantly altered in the presence of these peptides during a short-term liquid culture. Together, these data suggest the potential usefulness of arginine homopolymers in hematopoietic stem and progenitor cell manipulations.

Original languageEnglish (US)
Pages (from-to)415-419
Number of pages5
JournalHuman gene therapy
Issue number4
StatePublished - Apr 2004
Externally publishedYes


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