Controlled Bio-Orthogonal Catalysis Using Nanozyme-Protein Complexes via Modulation of Electrostatic Interactions
Liang Liu1, Xianzhi Zhang1, Stefano Fedeli1
1Department of Chemistry, University of Massachusetts Amherst, 710 N. Pleasant St., Amherst, MA 01003, USA.
Materials (Basel, Switzerland)
|April 13, 2024
Summary
This study presents a novel stimuli-responsive bio-orthogonal catalysis system using an enhanced green fluorescent protein-nanozyme complex. Ionic strength controls nanozyme activity, offering precise, in situ drug generation for targeted therapies.
Area of Science:
- Biochemistry
- Materials Science
- Catalysis
Background:
- Bio-orthogonal chemistry enables in situ therapeutic agent generation, minimizing off-target effects in drug delivery.
- Stimuli-responsive bio-orthogonal transition metal catalysts (TMCs) offer controllable spatial, temporal, and dosage delivery.
- Existing systems lack precise control over catalytic activity in response to external stimuli.
Purpose of the Study:
- To develop a stimuli-responsive bio-orthogonal catalysis system for controlled drug delivery.
- To investigate the modulation of nanozyme activity via ionic strength.
- To fabricate an enhanced green fluorescent protein-nanozyme (EGFP-NZ) complex for tunable catalysis.
Main Methods:
- Fabrication of an enhanced green fluorescent protein (EGFP)-nanozyme (NZ) complex.
- Modulation of the EGFP-NZ complex's catalytic properties by altering solution ionic strength.
- Correlation analysis of nanozyme catalytic rate with varying salt concentrations (0-150 mM).
Main Results:
- The EGFP-NZ complex exhibited stimuli-responsive catalytic behavior.
- Increased ionic strength led to EGFP-NZ complex dissociation, enhancing nanozyme accessibility and activity.
- A positive correlation was observed between salt concentration and the catalytic rate of the NZ/EGFP complex.
Conclusions:
- The developed EGFP-NZ complex provides a controllable bio-orthogonal catalysis system.
- Ionic strength is an effective stimulus for regulating nanozyme activity in this system.
- This approach holds promise for advanced, in situ drug delivery systems with enhanced targeting and efficacy.
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