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Related Experiment Video

Updated: Jun 11, 2025

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications

Published on: September 27, 2019

Fluidic Interface for Surface-based DNA Origami Studies.

Miguel García-Chamé¹, Ivy Mayer¹, Leonie Schneider¹

¹Institute for Biological Interfaces (IBG-1), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany.

ACS Applied Materials & Interfaces

|September 30, 2024

Summary

Researchers developed a microfluidic platform for real-time monitoring of DNA origami nanostructures (DONs) on surfaces. This method enables precise control over bioactive surfaces for studying cell signaling, specifically epidermal growth factor receptor (EGFR) activation.

Keywords:

DNA nanostructures Panitumumab epidermal growth factor receptor microfluidics micropatterning surfaces

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Last Updated: Jun 11, 2025

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Published on: July 21, 2023

Area of Science:

Biotechnology
Nanotechnology
Cell Biology

Background:

Traditional DNA origami nanostructures (DONs) studies in cell signaling use solution-based methods with standard equipment.
Surface-based DONs simplify analysis by anchoring to substrates, avoiding endocytosis complications.
Microscopic analysis of cell signaling requires precise control over DONs and their interactions.

Purpose of the Study:

To develop a microfluidic platform for real-time monitoring and surface functionalization with DONs.
To investigate the kinetics of DON immobilization and factors influencing binding.
To create high-quality bioactive surfaces for studying cell receptor activation.

Main Methods:

Developed a microfluidic platform combined with total internal reflection fluorescence microscopy.
Analyzed DON immobilization kinetics on DNA-functionalized surfaces under controlled flow.
Functionalized DONs with protein-binding ligands to create bioactive surfaces.
Investigated epidermal growth factor receptor (EGFR) activation in MCF-7 cancer cells using antibody-decorated DONs.

Main Results:

DON morphology and binding tags significantly influence binding kinetics.
Larger microfluidic channels improve DON hybridization efficiency, overcoming diffusivity challenges.
Successfully created bioactive surfaces that recruit and activate EGFR via clustering.
Quantified EGFR activation based on interligand distances of the targeting antibody.

Conclusions:

The microfluidic platform offers precise control for DON surface functionalization and real-time kinetic analysis.
This approach enhances the study of cell signaling pathways by creating controlled bioactive environments.
The developed method allows for quantitative investigation of receptor activation mechanisms, such as EGFR clustering.