한빛사 논문
Jeehun Parka, Taeyup Kimb, Jong Chul Choib, and Junsang Dohc,*
aSchool of Interdisciplinary Bioscience and Bioengineering (I-Bio), Pohang University of Science and Technology, 77, Cheongam-ro, Pohang, Gyeongbuk 37673, South Korea
bDepartment of Mechanical Engineering, Pohang University of Science and Technology, 77, Cheongam-ro, Pohang, Gyeongbuk 37673, South Korea
cDepartment of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
*To whom correspondence should be addressed.
Abstract
Dynamic adhesion and detachment of subcellular regions occur during cell migration, thus a technique allowing precise control of subcellular detachment of cells will be useful for cell migration study. Previous methods for cell detachment were developed either for harvesting cells or cell sheets attached on surfaces with low resolution patterning capability, or for detaching subcellular regions located on predefined electrodes. In this paper, a method that allows in situ subcellular detachment of cells with ≈1.5 µm critical feature size while observing cells under a fluorescence microscope is introduced using a cell‐friendly photoresist and spatially modulated light. Using this method, a single cell, regions in cell sheets, and a single focal adhesion complex within a cell are successfully detached. Furthermore, different subcellular regions of migrating cells are detached and changes in cell polarity and migration direction are quantitatively analyzed. This method will be useful for many applications in cell detachment, in particular when subcellular resolution is required.
Keywords : cell detachment, cell migration, light-responsive polymers, spatially modulated light
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