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Amine effect on phenylboronic acid complex with glucose under physiological pH in aqueous solution
Journal of Biomaterials Science. Polymer Edition
|January 1, 1996
Summary
Researchers developed an intelligent polymer system using phenylboronic acid (PBA) and an amine component. This novel copolymer enhances glucose binding, showing promise for applications like insulin delivery devices.
Area of Science:
- Polymer Chemistry
- Biomaterials Science
- Carbohydrate Chemistry
Background:
- Phenylboronic acid (PBA) derivatives are known for their ability to bind with polyols, including glucose.
- Existing PBA-based systems often face limitations in binding efficiency under physiological conditions.
- Incorporating functional groups can modulate polymer properties and interactions.
Purpose of the Study:
- To develop an improved "intelligent" polymer system with enhanced binding affinity for glucose.
- To investigate the effect of incorporating an amine component into a PBA-based polymer on glucose binding.
- To evaluate the potential of this new copolymer for applications in polyol separation and drug delivery.
Main Methods:
- Synthesized a novel PBA-based copolymer via free-radical copolymerization of 3-methacrylamidophenylboronic acid (MAPB) with N,N-dimethylaminopropylacrylamide (DMAPAA) and acrylamide (AAm).
- Utilized N,N -methylenebis(acrylamide) (Bis-AAm) as a cross-linker to form the polymer network.
- Quantified glucose binding efficiency using a batch method, analyzing the proportion of PBA groups complexed with glucose.
Main Results:
- The synthesized PBA-amine copolymer demonstrated enhanced binding with glucose compared to PBA copolymers lacking an amine component.
- Glucose binding increased proportionally with higher amine content in the polymer.
- Binding affinity was significantly improved at higher pH values, particularly at pH 7.4 and above, due to the interaction of unprotonated neighboring amines with PBA.
Conclusions:
- The novel PBA-amine copolymer exhibits strengthened glucose binding, especially under physiological conditions (pH 7.4+).
- This enhanced binding is attributed to the synergistic interaction between the amine groups and PBA moieties.
- The developed material holds significant potential for applications in polyol separation, protection, and as a component in insulin delivery systems.