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Bridging the Bio-Electronic Interface with Biofabrication

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Published on: June 6, 2012

DNA Release from a Modified Electrode Triggered by a Bioelectrocatalytic Process.

Madeline Masi¹, Paolo Bollella¹, Evgeny Katz¹

¹Department of Chemistry and Biomolecular Science , Clarkson University , Potsdam , New York 13699-5810 , United States.

ACS Applied Materials & Interfaces

|December 4, 2019

Summary

This summary is machine-generated.

Controlled DNA release from electrode surfaces is achieved by an interfacial pH increase, triggered by oxygen reduction catalyzed by bilirubin oxidase. This method enables versatile biomolecule and nanospecies release platforms.

Keywords:

biocatalytic cascade biomolecular release interfacial pH modified electrode modified nanoparticles thylakoid membrane

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Area of Science:

Bioelectrochemistry
Nanomaterials Science
Biomolecular Engineering

Background:

DNA immobilization on electrode surfaces is crucial for biosensors and drug delivery.
Controlled release mechanisms often require external stimuli, which can be complex to implement.
Bio-electrocatalysis offers a promising route for generating precise stimuli at interfaces.

Purpose of the Study:

To develop a novel method for controlled DNA release from electrode surfaces.
To utilize bio-electrocatalysis for generating interfacial stimuli.
To establish a versatile platform for triggered release of biomolecules and nanospecies.

Main Methods:

Immobilization of bilirubin oxidase on SiO2 nanoparticles functionalized with trigonelline and boronic acid.
Stimulation of DNA release via interfacial pH increase caused by oxygen reduction.
Generation of electrical potential in situ using biocatalytic or photo-biocatalytic processes.

Main Results:

Application of a mild electrical potential (0 V vs Ag/AgCl) induced DNA release.
Interfacial pH increase, driven by O2 reduction, reversed surface charge, leading to DNA repulsion.
In situ potential generation using biocatalytic cascades or photosynthesis successfully triggered DNA release.

Conclusions:

A bio-electrocatalytic system enables controlled DNA release through pH-mediated surface charge modulation.
The developed platform demonstrates versatility for triggered release using electrical, biomolecular, or light signals.
This approach offers a general interfacial platform for controlled release applications.