Targeted Liposomes Penetrating Blood-Brain Barrier
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Solution Overview
Problem
The blood-brain barrier poses a significant challenge for delivering pharmaceutical agents to the brain, as it restricts the passage of many solutes and hydrophilic molecules, making it difficult to treat neurological disorders and CNS neoplasms effectively.
Innovation Solution
The development of liposomes containing modified targeting peptides and cannabinoids, which are designed to penetrate the blood-brain barrier by binding to specific transporters, thereby facilitating the delivery of cannabinoids to the brain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pharmaceutical agents are administered systemically to circulate in the vascular system, then the agents can reach target tissues through blood circulation, but the agents are blocked from reaching the brain due to the blood-brain barrier
Solution Approach 1:
The patent uses liposomes as intermediary carriers to transport pharmaceutical agents across the blood-brain barrier. The liposomes are engineered with specific surface properties and targeting ligands that enable them to interact with BBB transport mechanisms, thereby mediating the passage of encapsulated drugs from the bloodstream into the brain tissue.
Solution Approach 2:
The patent modifies various parameters of the liposomal system including surface charge, hydrophobicity, size, and surface functionalization to optimize BBB penetration. By adjusting these physical and chemical parameters, the liposomes can exploit specific transport pathways across the blood-brain barrier while maintaining stability in circulation.
2Reliability
If the blood-brain barrier is made more permeable to allow drug passage, then neurological disorders can be treated, but the barrier loses its protective function against pathogens and unwanted solutes
Solution Approach 1:
The patent imparts local quality to the blood-brain barrier by enabling selective permeability. The liposomes are designed to interact specifically with certain BBB transport mechanisms while leaving the overall barrier structure intact. This allows localized drug delivery to the brain without compromising the general protective function of the barrier against pathogens and unwanted solutes.
Solution Approach 2:
The liposomes act as intermediaries that temporarily interact with the BBB transport system to deliver drugs, then are processed by cellular mechanisms. This intermediary approach allows drug passage through controlled interactions with specific transporters without creating permanent openings or compromising the barrier's overall integrity and protective functions.
3Ease of operation
If conventional liposomal compositions are used for systemic delivery, then pulmonary administration is possible, but effective brain delivery is not achieved due to lack of targeting capability
Solution Approach 1:
The patent creates multi-functional liposomes that combine systemic delivery capability with brain-specific targeting. The liposomal system performs multiple functions: it can be administered systemically (maintaining ease of operation), protects the cargo during circulation, targets BBB transport mechanisms, and delivers drugs to the brain. This universal design integrates both pulmonary/systemic administration convenience and effective brain delivery.
Solution Approach 2:
The patent employs composite liposomal structures combining phospholipid bilayers with incorporated targeting ligands, hydrophobic/hydrophilic domains, and potentially PEGylation. This composite material design enables the liposomes to exhibit both systemic circulation stability and active targeting capabilities to the brain, resolving the contradiction between ease of systemic administration and reliable brain delivery.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of liposomes with modified targeting peptides allows for effective penetration of the blood-brain barrier, enhancing the delivery of cannabinoids to the brain, which can potentially treat a wide range of neurological disorders and CNS conditions.
Implementation Method 1
designed to penetrate the blood-brain barrier by binding to specific transporters
Implementation Method 2
Liposomes comprising a modified peptide and at least one cannabinoid
Data Source
Figure 1
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AI summary
Described herein are liposomes containing modified targeting peptides. Liposomes preferably comprise a lipid-based bilayer and at least one cannabinoid. Also provided herein are methods for making the liposomes, and methods for treatment of diseases of the CNS using the liposomes.