Modulation of acetylcholinesterase activity using molecularly imprinted polymer nanoparticles

Area of Science:

• Biochemistry
• Nanotechnology
• Enzyme kinetics

Background:

• Enzyme activity modulation is crucial for biological pathways.
• Pharmaceutical strategies focus on inhibitors, but activators are less developed.
• Acetylcholinesterase (AChE) is a key enzyme with implications in various physiological and pathological processes.

Purpose of the Study:

• To develop novel methods for promoting enzyme activation.
• To identify surface epitopes on AChE for targeted activation.
• To create molecularly imprinted nanoparticles (nanoMIPs) for enzyme modulation.

Main Methods:

• Innovative epitope mapping using molecular imprinting.
• Synthesis of nanoMIPs targeting identified AChE surface epitopes.
• Enzyme activity assays to quantify nanoMIP effects on native and inhibited AChE.

Main Results:

• Four surface epitopes of AChE were successfully identified.
• Synthesized nanoMIPs significantly increased AChE enzymatic activity (up to 47×).
• nanoMIPs restored inhibited AChE activity from 11% to 73%.

Conclusions:

• Molecular imprinting provides a new strategy for enzyme activation.
• nanoMIPs demonstrate allosteric modulation by stabilizing protein conformation.
• This approach offers potential therapeutic applications for enzyme deficiency diseases and poisoning.