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27th European Diabetes Congress

Rome, Italy

Kyunglim Lee

Kyunglim Lee

Ewha Womans University | Korea

Title: Use of transnationally controlled tumor protein-derived protein transduction domain for improved intranasal delivery of insulin


Biography: Kyunglim Lee


Statement of the Problem: Insulin is given to patients with diabetes by subcutaneous injection. However, noninvasive intranasal administration is easier for patients requiring daily treatment. Protein transduction domains (PTDs) are recognized as promising vehicles for the delivery of macromolecular drugs. We have previously shown that a region in the N-terminus (residues 1–10) of translationally controlled tumor protein (TCTP) contains aPTD (TCTP-PTD), MIIYRDLISH, which can serve as a vehicle for the delivery of macromolecules into the cells and tissues. In the current study, we evaluated the potential and safety of TCTP-PTD and its mutant analogs as nasal absorption enhancers for delivery of insulin. The goal of the current study was to examine whether the co administration of a drug with TCTP-PTD or its mutant analogs, can efficiently deliver insulin into the nasal mucosal membranes of animals.

Methodology & Theoretical Orientation: We examined the degree to which insulin was absorbed in nasal mucosa and also if any mucosal damage occurs following such nasal delivery of insulin using TCTP-PTDs as a vehicle. The systemic delivery of insulin was assessed by measuring the changes in blood glucose levels after nasal co administration insulin and TCTP-PTDs.

Findings: Of the 4 TCTP-PTD analogs examined, TCTP-PTD 13 significantly enhanced the nasal absorption of insulin in normal mice as well as alloxan induced diabetic rats. The binding between the TCTP-PTD analog and insulin may enable the penetration of insulin through the nasal mucosa. Histological examination of mice and rat nasal mucosa 7 days after repeated nasal administration showed no evidence of toxicity at the site of nasal administration.

Conclusion & Significance: In this study using insulin as a test system we demonstrate that the TCTP-PTD analog offers a promising approach for nasal peptides and protein-drugs delivery.