Microtable arrays for culture and isolation of cell colonies.

Analytical and Bioanalytical Chemistry
Jeng-Hao PaiNancy L Allbritton

Abstract

Cell microarrays with culture sites composed of individually removable microstructures or micropallets have proven benefits for isolation of cells from a mixed population. The laser energy required to selectively remove these micropallets with attached cells from the array depends on the microstructure surface area in contact with the substrate. Laser energies sufficient to release micropallets greater than 100 μm resulted in loss of cell viability. A new three-dimensional culture site similar in appearance to a table was designed and fabricated using a simple process that relied on a differential sensitivity of two photoresists to UV-mediated photopolymerization. With this design, the larger culture area rests on four small supports to minimize the surface area in contact with the substrate. Microtables up to 250 × 250 μm were consistently released with single 10-μJ pulses to each of the four support structures. In contrast, microstructures with a 150 × 150-μm surface area in contact with the substrate could not be reliably released at pulse energies up to 212 μJ. Cassie-Baxter wetting is required to provide a barrier of air to localize and sequester cells to the culture sites. A second asset of the design was an increased ret...Continue Reading

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Mar 5, 2010·Analytical Chemistry·Wei XuNancy L Allbritton

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Citations

Dec 1, 2011·Nature Methods·Fedor V SubachVladislav V Verkhusha
Nov 26, 2015·Lab on a Chip·Wesley A Cox-MuranamiMark Bachman
Oct 14, 2017·Scientific Reports·Trisha M WesterhofEdward L Nelson
Oct 15, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Renaud DufourVincent Thomy

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