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Transthyretin as a new transporter of nanoparticles for receptor-mediated transcytosis in rat brain microvessels
- Transthyretin as a new transporter of nanoparticles for receptor-mediated transcytosis in rat brain microvessels
- Kim, So Yeun; Choi, Eun-Sook; Lee, Hyo-Jung; Moon, Cheil; Kim, Eunjoo
- DGIST Authors
- Moon, Cheil; Kim, Eunjoo
- Issue Date
- Colloids and Surfaces B: Biointerfaces, 136, 989-996
- Article Type
- Animal; Animal Cell; Animal Experiment; Animal Tissue; Animals; Assays; Biological Transport; Blood; Blood-Brain Barrier; Blood-Brain Barrier (BBB); Blood Brain Barrier; Brain; Brain Capillary Endothelial Cell; Cell Culture; Cells, Cultured; Clathrin-Dependent Endocytosis; Confocal Microscopy; Controlled Study; Creatine Kinase MM; Directed Transport; Drug Delivery; Endothelial Cells; Human; Human Cell; In-Vitro Assays; In Vitro Study; In Vivo Study; MALDI-TOF Mass Spectroscopy; Male; Mass Spectrometry; Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry; Medical Nanotechnology; Metabolism; Microscopy, Confocal; Microvasculature; Microvessels; Molecular Biology; Nanomedicine; Nanoparticle; Nanoparticles; Non-Human; Physiology; Prealbumin; Priority Journal; Proteins; Quantum Dot; Quantum Dot Nanoparticles; Rat; Rats; Rats, Sprague-Dawley; Receptor-Mediated Transcytosis; Semiconductor Quantum Dots; Sprague Dawley Rat; Tissue Distribution; Transcytosis; Transport At The Cellular Level; Transthyretin; Validation Study; Vascularization
- Many drugs are unable to breach the blood-brain barrier (BBB). Protein-directed transport of nanomedicine by receptor-mediated transcytosis (RMT) has been investigated as a means to overcome this problem. In this study, we screened transporters using an in vitro transcytosis assay system in rat serum to identify candidates that could guide nanoparticles through the BBB by RMT. The proteins that showed over 5-fold decreases in RMT when treated with chloropromazine, an inhibitor of clathrin-dependent endocytosis, were selected and identified by Maldi-TOF mass spectroscopy. Eleven proteins, including transthyretin (Ttr), and creatine kinase-muscle type (CKM), were identified as being capable of penetrating the endothelial cell layer by RMT. Among them, 10 proteins have not yet been used to transport nanomaterials across the BBB. To validate their activity as nanoparticle transporters in vivo, Ttr and CKM were conjugated to the surface of quantum dot (QD) nanoparticles and administrated intravenously. After 8. h, the distribution of Ttr-QDs and CKM-QDs in brain tissue was analyzed. The results showed transcytosis of Ttr-QD conjugates across the BBB in rats as well as in in vitro assays, which was in contrast to the results observed for bare QDs and CKM-QDs. Taken together, these results indicate that Ttr is a new putative transporter for nanomedicines across the BBB. © 2015 Elsevier B.V.
- Elsevier B.V.
- Related Researcher
Biomarker, liquid biopsy, nanomedicine, molecular diagnosis
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