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A Versatile Method of Patterning Proteins and Cells

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Published on: February 26, 2017

Perforation Does Not Compromise Patterned Two-Dimensional Substrates for Cell Attachment and Aligned Spreading.

Stephen B Bandini¹, Joshua A Spechler², Patrick E Donnelly³

¹Department of Chemistry, ‡Department of Mechanical and Aerospace Engineering, §Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, United States.

ACS Biomaterials Science & Engineering

|January 15, 2021

Summary

This summary is machine-generated.

Laser-perforated polymer sheets with patterned cell-adhesive interfaces enable controlled fibroblast alignment. This technique maintains pattern fidelity across various perforation densities for tissue engineering applications.

Keywords:

perforated substrate polymer laser ablation two-dimensional patterned cell alignment

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Area of Science:

Biomaterials Science
Tissue Engineering
Surface Chemistry

Background:

Creating patterned surfaces is crucial for guiding cell behavior.
Laser ablation offers a precise method for surface modification.
Controlling cell adhesion and alignment on complex substrates remains a challenge.

Purpose of the Study:

To develop and evaluate laser-perforated polymer sheets for controlled cell patterning.
To investigate the impact of perforation density on surface patterning and cell alignment.
To assess the fidelity of cell adhesion and spreading on these novel substrates.

Main Methods:

Polymer sheets were perforated using laser ablation.
A photoresist layer protected the surface during perforation.
Photolithography was used to create striped patterns of a cell-attractive zirconium oxide-1,4-butanediphosphonic acid interface.
NIH 3T3 fibroblasts were cultured on the patterned surfaces.
Microscopy and scanning electron microscopy were used for analysis.

Main Results:

Well-aligned stripes were successfully fabricated on perforated polymer sheets.
Perforation densities of 5%, 10%, and 20% did not compromise stripe alignment.
Fibroblasts attached to the patterned interface and spread in alignment with the stripes.
Pattern fidelity was high, comparable to non-perforated substrates.

Conclusions:

Laser perforation combined with photolithography is an effective method for creating patterned biomaterial surfaces.
This technique allows for controlled cell alignment on perforated substrates.
The method shows promise for applications in tissue engineering and regenerative medicine.