Zwitterionic Nanoparticles for Selective LSEC Targeting
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Solution Overview
Problem
Current zwitterionic nanoparticles coated with zwitterionic structures do not exhibit the expected low non-specific protein absorption and stealth behavior, leading to unpredictable biological interactions and reduced selectivity for biological targets, which hampers their biomedical applications.
Innovation Solution
Development of zwitterionic nanoparticles with a specific zwitterionic coating that exhibits structure-dependent selectivity for uptake into liver sinusoidal endothelial cells (LSECs), allowing for targeted immunomodulatory effects and therapeutic applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nanoparticles are coated with zwitterionic structures to achieve stealth behavior and low non-specific protein absorption, then the nanoparticles should exhibit indifferent behavior toward biological influences, but the actual result is unpredictable biological interactions and formation of biomolecular corona
Solution Approach 1:
The patent applies parameter changes by modifying the zwitterionic structure parameters - specifically using betaine structures with particular amino acid compositions (containing hydrophobic, aromatic, and basic amino acids) and controlling the density and arrangement of zwitterionic groups on the nanoparticle surface. This structural parameter optimization enables the nanoparticles to achieve both low non-specific protein absorption and selective cellular uptake, resolving the contradiction between stealth behavior and biological activity.
2Object-affected harmful factors
If zwitterionic structures are used to passivate the nanoparticle surface against biological influences, then the nanoparticles become invisible to the biological system, but this eliminates the ability to achieve high selectivity for specific biological targets
Solution Approach 1:
The patent applies local quality by creating heterogeneous zwitterionic surface structures with different functional regions. The nanoparticle surface contains betaine structures with specific local compositions including hydrophobic amino acids (leucine, isoleucine, valine), aromatic amino acids (phenylalanine, tyrosine, tryptophan), and basic amino acids (lysine, arginine, histidine). This local structural differentiation enables the nanoparticle to exhibit both anti-fouling properties in certain regions and selective recognition capabilities in other regions, allowing simultaneous stealth behavior and target selectivity.
3Reliability
If conventional zwitterionic coatings are applied to nanoparticles, then the surface should be protected against opsonization, but the nanoparticles still exhibit reduced selectivity and unpredictable biological behavior
Solution Approach 1:
The patent applies composite materials by combining multiple amino acid types within the betaine structure to create a composite zwitterionic coating. The betaine structures contain combinations of hydrophobic amino acids (leucine, isoleucine, valine), aromatic amino acids (phenylalanine, tyrosine, tryptophan), and basic amino acids (lysine, arginine, histidine). This composite amino acid composition within the zwitterionic framework provides both robust opsonization resistance and enhanced selectivity for liver sinusoidal endothelial cells, resolving the contradiction between protection and precision.
Data Source
AI summary
The present invention relates to a zwitterionic nanoparticle, the zwitterionic nanoparticle comprising at least one nanoparticle and a zwitterionic case enclosing the nanoparticle.Furthermore, the present invention relates to a composition, a method of binding a zwitterionic nanoparticle and the use of a zwitterionic nanoparticle.