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Brain-targeted delivery of protein using chitosan- and RVG peptide-conjugated, pluronic-based nano-carrier

2012; Elsevier BV; Volume: 34; Issue: 4 Linguagem: Inglês

10.1016/j.biomaterials.2012.09.047

1878-5905

Jayoung Kim, Won Il Choi, Young Ha Kim, Giyoong Tae,

Lipid Membrane Structure and Behavior

Brain-targeted delivery of drug or imaging agent is hard to achieve efficiently due to the infiltrative nature of the blood-brain barrier (BBB). Moreover, delivery of therapeutic proteins to brain tissue is further limited by the size and physic-chemical properties of proteins. In this work, we developed a chitosan-conjugated Pluronic-based nano-carrier with a specific target peptide for the brain (rabies virus glycoprotein; RVG29) and applied for the protein delivery to the brain. The in-vivo brain accumulation of the nano-carrier in mice followed i.v injection was optically monitored with Cy5.5-conjugation to the nano-carrier, and the result showed that the Pluronic-based nano-carrier conjugated with both chitosan and the peptide was very efficient for the accumulation in brain tissue and was remarkably better than the nano-carrier conjugated with the peptide only. β-galactosidase, a model protein, was also delivered and accumulated efficiently in the brain by loading in the nano-carrier, analyzed by the bio-distribution of β-galactosidase. The delivered protein in the brain also maintained its bioactivity. Therefore, RVG29- and chitosan-conjugated Pluronic-based nano-carrier could be potentially useful for the diagnosis and therapy of brain diseases.