Abstract：
:Carrier-mediated transport of small peptides and peptidomimetics offers the opportunity for a targeted drug delivery across cell membranes in the central nervous system (CNS). This process is mediated by the proton-coupled transporter PEPT2 which is expressed in glial and choroid plexus cells. In the present studies, an uptake assay was established to visualize directly peptide uptake in intact rat brain slices. Accumulation of a reporter molecule, the fluorophore-labeled dipeptide derivative D-Ala-L-Lys-AMCA, was found in plexus choroideus and glial cells and uptake was inhibited by prototypical PEPT2 substrates, such as glycyl-L-glutamine and cefadroxil. The presence of PEPT2 was confirmed by RT-PCR and Northern blot analysis. This first CNS peptide and drug transport-visualizing assay may be used to examine new compounds which are carried by the proton-driven CNS peptide transporter.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Groneberg DA,Rubio-Aliaga I,Nickolaus M,Döring F,Fischer A,Daniel Hdoi
10.1016/j.neulet.2004.04.013keywords:
subject
Has Abstractpub_date
2004-06-24 00:00:00pages
32-6issue
1eissn
0304-3940issn
1872-7972pii
S0304394004004124journal_volume
364pub_type
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