Nose-to-brain delivery of hyaluronate - FG loop peptide conjugate for non-invasive hypoxic-ischemic encephalopathy therapy.

Abstract

The intranasal drug administration has attracted great interest as a non-invasive route allowing targeted delivery of drugs directly to the brain. However, one of the main issues in nasal drug administration is mucociliary clearance. Hyaluronate (HA) has been widely used as a mucoadhesive excipient for ocular, rectal, and vaginal delivery. Here, FG loop peptide (FGL) was conjugated to HA for improving enzymatic stability and delivery efficiency from the nose to the brain. The successful conjugation of FGL to aldehyde modified HA was confirmed by gel permeation chromatography (GPC) and 1H nuclear magnetic resonance (NMR). The outstanding enzymatic stability of HA-FGL conjugate was also corroborated by the GPC. The HA-FGL conjugate showed enhanced binding affinity onto nasal epithelial cells. In addition, in vivo nose-to-brain delivery of HA-FGL conjugate could be visualized by using an IVIS imaging system and fluorescence microscopy. Finally, in vivo therapeutic effect of HA-FGL conjugate was successfully confirmed by histological analysis, transferase-mediated uridine 5-triphosphate-biotin nick end-labeling (TUNEL) assay, immunofluorescent staining, transmission electron microscopy (TEM), and rotarod tests in hypoxic-ischemic encephalopathy model animals.

• Authors: Yun Seop Kim, Dong Kyung Sung, Hyemin Kim, Won Ho Kong, Young Eun Kim, Sei Kwang Hahn
• Journal: Journal of controlled release : official journal of the Controlled Release Society (J Control Release) Vol. 307 Pg. 76-89 (08 10 2019) ISSN: 1873-4995 [Electronic] Netherlands
• PMID: 31229472 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2019 Elsevier B.V. All rights reserved.

Chemical References

• FGLL peptide
• Hyaluronan Receptors
• Peptides
• Receptors, Fibroblast Growth Factor
• Hyaluronic Acid

Topics

• Administration, Intranasal
• Animals
• Animals, Newborn
• Brain (metabolism)
• Cell Line, Tumor
• Drug Delivery Systems
• Female
• Humans
• Hyaluronan Receptors (metabolism)
• Hyaluronic Acid (administration & dosage, chemistry, pharmacokinetics)
• Hypoxia-Ischemia, Brain (drug therapy, metabolism)
• Male
• Nasal Mucosa (drug effects, metabolism)
• Neurons (drug effects)
• Peptides (administration & dosage, chemistry, pharmacokinetics)
• Pregnancy
• Rats, Sprague-Dawley
• Receptors, Fibroblast Growth Factor (metabolism)