Chitosan-coated C-phycocyanin Liposome for Extending the Neuroprotective Time Window Against Ischemic Brain Stroke

Area of Science:

• Neuroscience
• Biomaterials Science
• Pharmacology

Background:

• Ischemic stroke necessitates rapid neuroprotection due to a limited therapeutic time window.
• C-Phycocyanin (C-Pc) liposomes show proven neuroprotective potential.
• Chitosan's muco-adhesive properties offer potential for drug delivery enhancement.

Purpose of the Study:

• To evaluate if muco-adhesive chitosan coating improves the neuroprotective efficacy of C-Pc liposomes.
• To determine if chitosan-coated C-Pc liposomes can extend the therapeutic time window for ischemic stroke.

Main Methods:

• Utilized a rat Middle Cerebral Artery Occlusion (MCAO) model to simulate ischemic stroke.
• Administered chitosan-coated C-Pc liposomes and assessed neuroprotection duration and efficiency.
• Analyzed mRNA expression of antioxidant, inflammatory, and glial scar markers.
• Tested anti-oxidative activity and cytotoxicity in cultured astrocytes.

Main Results:

• Chitosan-coated C-Pc liposomes extended the neuroprotective window by 6 hours post-occlusion.
• Enhanced neuroprotection efficiency was observed compared to non-coated C-Pc liposomes.
• Beneficial changes in mRNA expression related to antioxidants and inflammation were noted.
• Chitosan-coated C-Pc liposomes demonstrated anti-oxidative activity in astrocytes without cytotoxicity.

Conclusions:

• Muco-adhesive chitosan coating significantly enhances the neuroprotective potential of C-Pc liposomes.
• Chitosan-coated C-Pc liposomes represent a promising strategy to extend the therapeutic window for ischemic stroke.
• This formulation offers a safe and effective approach for neuroprotection with potential clinical applications.