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A Multilayer Microfluidic Platform for the Conduction of Prolonged Cell-Free Gene Expression

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A Versatile Microfluidic Platform for Extravasation Studies Based on DNA Origami-Cell Interactions.

Miguel García-Chamé¹, Parvesh Wadhwani², Juliana Pfeifer³

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

Angewandte Chemie (International Ed. in English)

|April 30, 2024

Summary

This study introduces a new microfluidic device to observe cancer cell extravasation. It reveals how adhesion peptide details on DNA nanostructures influence cancer cell metastasis.

Keywords:

DNA structures cancer extravasation integrins microfluidics

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Published on: September 27, 2016

Area of Science:

Biomedical Engineering
Cell Biology
Cancer Research

Background:

Circulating tumor cells (CTCs) extravasation is key to metastasis, but difficult to study.
Integrins on CTCs regulate extravasation, yet current models have limitations.
Understanding cancer cell adhesion is vital for developing anti-metastatic therapies.

Purpose of the Study:

To develop a novel microfluidic device for studying cancer cell extravasation.
To investigate the role of integrin-specific adhesion in cancer cell transmigration.
To analyze how nanoscale patterns of adhesion peptides affect extravasation.

Main Methods:

A microfluidic device with a porous membrane functionalized with DNA origami nanostructures (DONs).
DONs display nanoscale patterns of adhesion peptides to mimic the endothelial barrier.
3D confocal imaging to visualize cancer cell transmigration under physiological flow conditions.

Main Results:

The device allows study of integrin-specific adhesion independently.
Cancer cell extravasation (MDA-MB-231) is sensitive to peptide type, distance, and density on DONs.
Combined RGD and IDS peptides did not enhance extravasation synergistically.

Conclusions:

The microfluidic system provides a powerful tool for studying cancer cell extravasation.
Nanoscale control over adhesion peptides influences cancer cell transmigration.
Integrin-mediated adhesion is complex and not always additive in promoting metastasis.