Restricted Access Molecularly Imprinted Polymers.

Area of Science:

• Polymer Chemistry
• Analytical Chemistry
• Biochemistry

Background:

• Conventional molecularly imprinted polymers (MIPs) face challenges in biological sample preparation due to protein interference.
• High protein concentrations can block binding sites, reduce capacity, and affect analytical accuracy.
• This necessitates the development of modified MIPs for complex biological matrices.

Purpose of the Study:

• To describe a generic synthesis protocol for restricted access molecularly imprinted polymers (RAMIPs).
• To present assays for evaluating the protein exclusion efficiency of RAMIPs.
• To explore applications of RAMIPs in sample preparation for complex biological samples.

Main Methods:

• Modification of conventional MIPs with superficial coverings (hydrophilic groups/proteins) to create RAMIPs.
• Development of specific assays to quantify protein exclusion capabilities.
• Demonstration of RAMIPs in selective extraction of small molecules from biological fluids.

Main Results:

• RAMIPs effectively exclude macromolecules like proteins from binding sites.
• The developed synthesis protocol yields materials with high protein exclusion efficiency.
• RAMIPs facilitate selective extraction of small molecules from untreated complex matrices (blood, plasma, serum, milk).

Conclusions:

• RAMIPs offer a robust solution for preparing biological samples by preventing protein interference.
• The described protocol and assays provide a framework for developing and validating RAMIPs.
• RAMIPs are valuable tools for both offline and online analytical procedures involving complex biological matrices.