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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Transport of a Prolyl Endopeptidase Inhibitory Peptide across the Blood-Brain Barrier Demonstrated Using the hCMEC/D3 Cell Line Transcytosis Assay.
Journal of Agricultural and Food Chemistry 2016 January 14
The blood-brain barrier (BBB) remains a significant hurdle for treatment of central nervous system (CNS) and mental health disorders. A prolyl endopeptidase (PEP) inhibitory peptide with the amino acid sequence proline-proline-leucine (PPL) was chemically synthesized labeled with 5-FAM and assessed using a transcytosis assay for its ability to cross the BBB. Transport of this peptide across the BBB was determined using an in vitro model of the human BBB, which utilizes the human cerebral microvascular endothelial cell line (hCMEC/D3). Uptake and transport of 5-FAM-PPL across the hCMEC/D3 cell model was determined using confocal microscopy and mass spectrometry. This is an important parameter in determining whether peptides may reach the target organ (i.e., the brain and central nervous system).This work assessed, for the first time, the ability of a food-derived PEP inhibitory peptide to cross the BBB without the use of animal models.
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