Brain-Targeted Dual Site-Selective Functionalized Poly(β-Amino Esters) Delivery Platform for Nerve Regeneration

Area of Science:

• Neuroscience
• Biomaterials Science
• Drug Delivery Systems

Background:

• Brain injuries cause significant neurological deficits with limited clinical treatments.
• Efficient therapeutic delivery across the blood-brain barrier (BBB) remains a major challenge for treating brain injuries.

Purpose of the Study:

• To develop a novel delivery system for promoting brain nerve regeneration.
• To overcome the challenge of therapeutic delivery across the BBB for brain injury treatment.

Main Methods:

• Developed dual site-selective functionalized (DSSF) poly(β-amino esters) using bio-orthogonal chemistry.
• Utilized fluorescence colocalization to demonstrate mitochondrial targeting via electrostatic interactions.
• Investigated the accumulation of the delivery system in injured brain sites.

Main Results:

• The DSSF poly(β-amino esters) effectively targeted mitochondria.
• The delivery system showed efficient accumulation at injured brain sites.
• Accelerated recovery of injured brain tissue was observed.

Conclusions:

• DSSF poly(β-amino esters) represent a promising platform for brain nerve regeneration.
• This strategy offers a new method for constructing dual regioselective carriers for protein/peptide delivery and tissue engineering.
• The developed system facilitates therapeutic delivery across the BBB to injured brain regions.