Ferritin-Iron Complex Brain Delivery via H-Ferritin Receptors
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Solution Overview
Problem
Current methods for delivering iron to the brain, such as transferrin-mediated transport, are inadequate, especially considering the brain's protective blood-brain barrier, which limits the entry of essential iron compounds, leading to iron deficiency disorders like Parkinson's disease and attention deficit disorders.
Innovation Solution
Utilizing ferritin, specifically the H-ferritin receptor-mediated transport, to deliver iron across the blood-brain barrier by administering a ferritin-iron complex, which includes H-ferritin as a targeting moiety to facilitate iron uptake into the brain, and using ferritin-iron complexes in liposomes for targeted delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transferrin-mediated transport is used to deliver iron to the brain, then iron delivery mechanism is established, but the blood-brain barrier limits iron entry effectiveness
Solution Approach 1:
Ferritin serves as an intermediary carrier to transport iron across the blood-brain barrier. The patent identifies H-ferritin receptors on brain microvasculature endothelial cells and demonstrates that ferritin-iron complexes can be transported across the BBB through receptor-mediated mechanisms, bypassing the barrier's restrictive effects on traditional transferrin-mediated transport
Solution Approach 2:
The patent changes the delivery parameter from transferrin-mediated transport to ferritin-mediated transport. By utilizing H-ferritin's specific properties (including its ferroxidase activity and receptor recognition), the system achieves effective iron delivery across the blood-brain barrier, overcoming the limitations of conventional approaches
2Productivity
If pinocytosis is used to circumvent the blood-brain barrier, then some transport capability is achieved, but vesicle contribution to nonspecific transport is relatively little
Solution Approach 1:
H-ferritin acts as a specific intermediary that binds to receptors on brain microvasculature endothelial cells, enabling targeted and efficient iron transport across the blood-brain barrier. This receptor-mediated mechanism is significantly more effective than nonspecific pinocytosis, achieving both high productivity and reliability in iron delivery to the brain
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 ferritin-iron complex effectively transports iron into the brain, improving iron levels and alleviating iron deficiency disorders, as demonstrated by increased iron uptake and improved hematological and neurological parameters in animal models, offering a novel non-transferrin dependent iron delivery system.
Implementation Method 1
demonstrated the presence of H-ferritin receptors on endothelial cells in culture and on rat brain microvasculature, identifying H-ferritin as a means for transporting iron across the BBB
Data Source
AI summary
The present inventors have demonstrated the presence of H-ferritin receptors on endothelial cells in culture and on rat brain rat brain microvasculature, identifying H-ferritin as a means for transporting iron across the blood brain barrier. The present invention provides a method for treating an iron deficiency disorder in a patient, comprising administering to a patient in need thereof a therapeutically effective amount of a ferritin-iron complex. In an embodiment of the invention, the ferritin-iron complex comprises H-ferritin. In another embodiment, the iron deficiency disorder comprises an iron deficiency in the brain. The present invention also provides a method for delivering iron to the brain, comprising administering iron in the form of a ferritin-iron complex to a patient, whereby said iron is transported across the blood-brain barrier and delivered to the brain; a method for using H-ferritin as a targeting moiety, comprising attaching H-ferritin to a liposome, whereby said liposome is targeted to the brain and/or cells within the brain; and a method for treating an iron overload disorder in a patient, comprising administering to a patient in need thereof a therapeutically effective amount of a multi subunit ferritin complex, wherein said multi subunit ferritin complex is at less than 100% iron binding capacity.