Förster Resonance Energy Transfer (FRET) Demonstrates In Vitro Chitosan-Coated Nanocapsules Suitability for...

Area of Science:

• Nanotechnology
• Biomedical Engineering
• Pharmacology

Background:

• Intranasal drug delivery offers a direct route to the brain, bypassing biological barriers.
• Chitosan-coated nanocapsules possess mucoadhesive and cell-permeating properties, ideal for overcoming the nasal mucosa and blood-brain barrier.
• Assessing nanocapsule integrity during transport is crucial for effective drug delivery.

Purpose of the Study:

• To evaluate the structural integrity of chitosan-coated nanocapsules during intranasal transport across an in vitro epithelial barrier.
• To validate the use of Förster resonance energy transfer (FRET) for tracking nanocapsule integrity.
• To assess the potential of these nanocapsules for brain drug delivery.

Main Methods:

• Development of chitosan-coated nanoemulsion-based nanocapsules.
• Utilizing Förster resonance energy transfer (FRET) to monitor nanocapsule structural integrity.
• Establishment of an in vitro model using Calu-3 cells (epithelial barrier) and Balb-c 3T3 fibroblasts (target cells).

Main Results:

• Chitosan-coated nanocapsules maintained their structural integrity during transit across the in vitro epithelial barrier.
• The nanoemulsion core successfully permeated the epithelial model.
• Target cells successfully received the nanocapsule core, demonstrating successful transport.

Conclusions:

• Chitosan-coated nanocapsules are a robust platform for intranasal drug delivery to the brain.
• The study validates the effectiveness of FRET in assessing nanocapsule integrity during transport.
• These nanocapsules show significant potential for overcoming biological barriers in brain drug delivery.