Abstract
The phenomenon of protein transduction represents internalization of short peptides known as protein transduction domains (PTD) by cells. It is widely used in the development of new preparations for treatment of various brain disorders. However, the drug discovery process is limited by lack of simple and reliable models of blood brain barrier (BBB). These models should meet two main criteria: they should be applicable for testing of large numbers of samples simultaneously reproduce the physiological and functional characteristics of mammalian (including) human BBB. The major goal of this study was to estimate the BBB-crossing ability of known PTD-peptides using Drosophila melanogaster BBB as the model. We demonstrate here that after abdominal administration the PTD-peptide penetratin, derived from a Drosophila Antennapedia homeodomain protein can cross Drosophila and deliver the apoE mimetic peptide exhibiting neuroprotective properties.
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