CUED Publications database

Effects of parylene-C photooxidation on serum-assisted glial and neuronal patterning.

Delivopoulos, E and Murray, AF and Curtis, JC (2010) Effects of parylene-C photooxidation on serum-assisted glial and neuronal patterning. J Biomed Mater Res A, 94. pp. 47-58.

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Abstract

The increasing use of patterned neural networks in multielectrode arrays and similar devices drives the constant development and evaluation of new biomaterials. Recently, we presented a promising technique to guide neurons and glia reliably and effectively. Parylene-C, a common hydrophobic polymer, was photolithographically patterned on silicon oxide (SiO(2)) and subsequently activated via immersion in serum. In this article, we explore the effects of ultraviolet (UV)-induced oxidation on parylene's ability to pattern neurons and glia. We exposed parylene-C stripe patterns to increasing levels of UV radiation and found a dose-dependent reduction in the total mass of patterned cells, as well as a gradual loss of glial and neuronal conformity to the patterns. In contrast, nonirradiated patterns had superior patterning results and increased presence of cells. The reduced cell adhesion and patterning after the formation of aldehyde and carboxyl groups on UV-radiated parylene-C supports our hypothesis that cell adhesion and growth on parylene is facilitated by hydrophobic adsorption of serum proteins. We conclude that unlike other cell patterning schemes, our technique does not rely on photooxidation of the polymer. Nonetheless, the precise control of oxygenated groups on parylene could pave the way for the differential binding of proteins and other molecules on the surface, aiding in the adhesion of alternative cell types. (c) 2010 Wiley Periodicals, Inc. J Biomed Mater Res, 2010.

Item Type: Article
Uncontrolled Keywords: Animals Biocompatible Materials Cell Adhesion Cell Culture Techniques Cells, Cultured Neuroglia Neurons Oxidation-Reduction Photochemistry Photoelectron Spectroscopy Polymers Rats Rats, Sprague-Dawley Serum Silicon Dioxide Surface Properties Ultraviolet Rays Xylenes
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:56
Last Modified: 13 Apr 2021 08:25
DOI: 10.1002/jbm.a.32662