Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Jost, PJ; Harbottle, RP; Knight, A; Miller, AD; Coutelle, C; Schneider, H.
A novel peptide, THALWHT, for the targeting of human airway epithelia.
FEBS Lett. 2001; 489(2-3):263-269
Doi: 10.1016/s0014-5793(00)02236-5
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- Führende Autor*innen der Med Uni Graz
- Jost Philipp
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- Abstract:
- Targeting gene vectors to human airway epithelial cells may help to overcome the current inefficiency of gene transfer as the major problem confronting cystic fibrosis gene therapy. To elucidate novel ligands targeting abundant, apically located receptors on airway epithelial cells, a phage display library was screened for peptides binding with high affinity to such cells. This screening yielded a selectively enriched amino acid sequence, Thr-His-Ala-Leu-Trp-His-Thr (THALWHT). Subsequent binding studies confirmed that THALWHT-displaying phages bound much stronger than phages displaying control peptides to human airway epithelial cells. In contrast, no significant binding differences were observed on a variety of non-airway-derived human cell lines suggesting selective binding of the THALWHT motif to airway epithelia. Confocal microscopy of such cells after exposure to labelled synthetic THALWHT peptide indicated that its binding is followed by specific internalisation via endocytosis. A synthetic peptide comprising a cyclic CTHALWHTC domain and a DNA binding moiety enabled efficient targeted gene delivery into human airway epithelial cells. Competition assays with free THALWHT peptide confirmed the specificity of gene delivery. Thus, the THALWHT motif may prove a useful targeting moiety for both non-viral and viral gene therapy vectors.
- Find related publications in this database (using NLM MeSH Indexing)
- Amino Acid Sequence -
- Binding, Competitive -
- Bronchi - cytology
- Bronchi - metabolism
- Caco-2 Cells -
- Cell Line -
- DNA - genetics
- DNA - metabolism
- Epithelial Cells - metabolism
- Gene Transfer Techniques -
- Genetic Vectors - genetics
- Genetic Vectors - metabolism
- HeLa Cells -
- Humans -
- Luciferases - genetics
- Luciferases - metabolism
- Microscopy, Confocal -
- Oligopeptides - genetics
- Oligopeptides - metabolism
- Protein Binding -
- Recombinant Fusion Proteins - genetics
- Recombinant Fusion Proteins - metabolism
- Transfection -
- Tumor Cells, Cultured -
- Find related publications in this database (Keywords)
- phage display
- airway epithelium
- gene delivery
- cystic fibrosis gene therapy