Assessing embryonic stem cell response to surface chemistry using plasma polymer gradients

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Surface Chemistry

Background:

• Controlling cell-material interactions is crucial for biomedical applications.
• Gradient surfaces offer a high-throughput method for optimizing these interactions.
• Plasma polymerization is a versatile technique for creating functional surfaces.

Purpose of the Study:

• To investigate the influence of surface chemistry gradients on embryonic stem cell behavior.
• To demonstrate the utility of plasma polymer gradients for screening cell-material interactions.
• To probe the mechanisms underlying stem cell responses to varying surface chemistries.

Main Methods:

• Fabrication of lateral surface chemistry gradients using plasma polymerization of diethylene glycol dimethyl ether on an acrylic acid plasma polymer substrate.
• Characterization of gradient surfaces using X-ray photoelectron spectroscopy, infrared microscopy mapping, and profilometry.
• Assessment of mouse embryonic stem cell attachment, colony size, and marker retention on gradient surfaces with varying plasma polymerization times.

Main Results:

• Plasma polymer gradients effectively modulated embryonic stem cell attachment, colony size, and stem cell marker expression.
• Significant differences in cell adhesion and colony formation were observed across gradients with different deposition times.
• Plasma polymerization time influenced gradient depth and functional group distribution, but not the range of generated species.

Conclusions:

• Plasma polymer gradients are powerful tools for dissecting the impact of surface chemistry on stem cell behavior.
• The ability to manipulate gradient profiles by adjusting deposition time allows for tailored cell-material interactions.
• This approach facilitates the optimization of biomaterials for stem cell applications.