Abstract
Microfluidic chemotaxis platforms have historically been utilized to probe phenomena such as neutrophil migration and are beginning to be developed for diagnostic applications; however, current microfluidic chemotaxis systems require specialized engineering equipment such as syringe pumps and long time frames (hours) to develop a chemokine gradient, and cell chemotaxis typically requires multiple additional hours. The paperfluidic device described in this work is a low-cost, sharp (2 mm wide), quasi-stable (at least 20 min) and rapidly generated (<1 s) chemokine gradient system capable of examining cell migration response over short time frames (20 min) that can be easily assembled. A proof-of-concept experiment on human pan-T cells showed significant (p ≪ 0.01) directed migration to the chemokine gradient over the control condition. This new technique for cell migration studies provides a foundational step in designing microfluidic chemotactic platforms for point-of-care diagnostics.
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