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Neuronal Differentiation of Neural Progenitor Cells by Intracellular Delivery of Synthetic Oligopeptide Derived from Von Hippel-Lindau Protein

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Intracellular delivery of synthetic oligopeptides has the potential to promote the occurrence of various cellular events such as cell death, proliferation, growth inhibition, metabolic changes, and morphological changes. However, the regulation of cellular differentiation by intracellular delivery of synthetic oligopeptides has been little studied. Von Hippel- Lindau protein (pVHL) is one of the proteins that functions to induce the differentiation of neural progenitor cells (NPCs). To function in these cells, pVHL forms a complex composed of itself, elongin BC, Clu-2, and Rbx-1. It is suggested that the binding site of elongin BC in pVHL plays a critical role in pVHL function, i.e., ubiquitination, which is related to neuronal differentiation. So, we synthesized an oligopeptide corresponding to the elongin BC binding site, and delivered the oligopeptide into NPCs by using a mixture of trifluoroacetylated lipopolyamine and diloeoyl phosphatidylethanolamine (BioPorter) to form a peptide-lipid complex. After intracellular delivery of the oligopeptide, induction of differentiation of NPCs was shown in terms of neurite outgrowth and by immunocytochemical and electrophysiological means. The intracellular delivery of the synthetic oligopeptide derived from pVHL may provide a safe and valuable approach for the neuronal differentiation of NPCs.

Keywords: Neuronal differentiation; intracellular delivery; neural progenitor cell; oligopeptide; von Hippel-Lindau protein

Document Type: Research Article


Publication date: November 1, 2009

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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