Heparin Oligosaccharide Mimetics With Defined Sulfation Patterns
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Solution Overview
Problem
The complex heterogeneity of natural heparin polysaccharides has hindered efforts to understand the relationship between their diverse structures and biological functions, and there is a need for novel heparin analogs with distinct backbone structures and sulfation patterns.
Innovation Solution
Development of heparin and heparan sulfate mimetics with defined sulfation patterns, synthesized through specific chemical methods, to mimic the functions of native heparin and heparan sulfate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural heparin polysaccharides are used, then biological functions are achieved, but structural heterogeneity makes it difficult to understand structure-function relationships
Solution Approach 1:
The patent segments the complex natural heparin polysaccharide into defined oligosaccharide units with specific lengths (e.g., nona-saccharide, deca-saccharide) and controlled sulfation patterns. This segmentation allows systematic study of structure-function relationships by isolating specific structural motifs while maintaining biological activity.
Solution Approach 2:
The patent introduces local quality by creating heparin analogs with specific sulfation patterns at defined positions along the backbone. Different regions of the molecule have different sulfation densities and positions, allowing investigation of how local structural variations affect specific biological functions while maintaining overall homogeneity within each analog series.
2Productivity
If chemical and enzymatic syntheses of heparin oligosaccharides are used, then some progress is made, but preparing analogs approaching polysaccharide length with distinct backbone structures and sulfation patterns remains challenging
Solution Approach 1:
The patent employs preliminary action through the use of protected building blocks and stepwise synthesis strategies. Specific sugar units are prepared with protecting groups in advance, then assembled in a controlled sequence to build the final heparin analog with precise backbone structure and sulfation pattern. This allows complex structures to be constructed systematically rather than attempting direct synthesis.
Solution Approach 2:
The patent utilizes parameter changes by systematically varying synthesis conditions (such as temperature, time, reagent concentrations, and protection group removal conditions) to control the backbone structure length and sulfation pattern. By adjusting these parameters during the synthesis process, precise control over the final analog structure is achieved while maintaining high productivity.
Data Source
AI summary
The present disclosure relates to disaccharides with defined sulfation patterns, and oligosaccharide mimetics comprising the disaccharides as repeating units linked in a head to tail fashion. The present disclosure further relates to methods of making the same, and to methods of using the same to mediate cell proliferation, cell differentiation, amyloid plaque formation, anti-coagulation, and neuronal growth.