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Author Spotlight: Tackling Challenges in Synthetic Cell Engineering

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Stable and permeable polyion complex vesicles designed as enzymatic nanoreactors.

Yuting Wan¹, Yuening Qiu¹, Jin Zhou¹

¹State-Key Laboratory of Chemical Engineering, and Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, People's Republic of China. junyouwang@ecust.edu.cn.

|April 10, 2024

Summary

We developed stable, permeable polyion complex (PIC) vesicles for enzymatic nanoreactors. This design allows efficient enzyme loading and activation, enhancing biomedical and catalytic applications.

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Area of Science:

Polymer Science
Nanotechnology
Biotechnology

Background:

Polymeric vesicles are promising for enzymatic nanoreactors but face challenges in stability and permeability.
Efficient enzyme loading and activation are crucial for nanoreactor efficacy.

Purpose of the Study:

To develop stable and permeable polyion complex (PIC) vesicles for enhanced enzyme loading and activation.
To investigate factors controlling vesicle formation and enzyme loading.
To demonstrate the application of these vesicles in cascade reactions.

Main Methods:

Co-assembly of anionic diblock copolymer (PSS-b-PEO) with cationic branched poly(ethylenimine) (PEI).
Utilizing high salt concentration (500 mM NaCl) to inhibit enzyme-polymer interactions during assembly.
Characterization of vesicle properties and enzyme loading efficiency.

Main Results:

Successfully fabricated stable PIC vesicles with a permeable membrane.
Achieved efficient and safe enzyme loading due to inhibited enzyme-polymer interactions.
Demonstrated enhanced enzymatic activity and validated application in cascade reactions.

Conclusions:

Polyion complex (PIC) vesicles offer a facile strategy for creating stable, permeable nanoreactors.
The designed vesicles exhibit significant advantages for enzyme loading and activation.
This approach broadens the scope of polymeric nanoreactors in biomedical and catalytic fields.