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Light-Responsive Dynamic Protein Hydrogels Based on LOVTRAP.

Tianyu Duan¹, Qingyuan Bian¹, Hongbin Li¹

¹Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada.

Langmuir : the ACS Journal of Surfaces and Colloids

|August 16, 2021

Summary

This summary is machine-generated.

Researchers developed light-responsive protein hydrogels using a LOVTRAP crosslinking mechanism. These injectable hydrogels exhibit tunable mechanical properties and self-healing capabilities, advancing biomaterials for tissue engineering and drug delivery.

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Area of Science:

Biomaterials Science
Protein Engineering
Tissue Engineering

Background:

Protein-based hydrogels mimic native extracellular matrices (ECMs).
Tunable mechanical and biochemical properties are crucial for biomedical applications.
Light is an advantageous stimulus for spatiotemporal control.

Purpose of the Study:

To engineer light-responsive protein hydrogels using a novel crosslinking mechanism.
To investigate the effect of light on the hydrogel's viscoelastic properties.
To assess the potential of these hydrogels for biomedical applications.

Main Methods:

Utilized the light-responsive LOVTRAP interaction (LOV2 and ZDark1) as a crosslinking mechanism.
Engineered multifunctional protein building blocks containing LOV2 and ZDark1.
Characterized the hydrogel's mechanical properties (storage modulus) under dark and light conditions.

Main Results:

Successfully engineered light-responsive protein hydrogels.
Demonstrated light-induced changes in viscoelastic properties: higher storage modulus in dark, decreased under blue light.
Exhibited shear-thinning and self-healing properties due to the noncovalent LOVTRAP crosslinking.
Showcased injectability, a key feature for biomedical applications.

Conclusions:

LOVTRAP interaction provides an effective strategy for creating dynamic, light-responsive protein hydrogels.
These hydrogels offer tunable mechanical properties and desirable characteristics like injectability and self-healing.
This work expands the possibilities for developing advanced protein hydrogels for diverse biomedical applications, including tissue engineering and drug delivery.