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Micropatterns of positive guidance cues anchored to polypyrrole doped with polyglutamic acid: A new platform for characterizing neurite extension in complex environments

Paper ID Volume ID Publish Year Pages File Format Full-Text
11810 759 2006 12 PDF Available
Title
Micropatterns of positive guidance cues anchored to polypyrrole doped with polyglutamic acid: A new platform for characterizing neurite extension in complex environments
Abstract

This paper describes a method for preparing substrates with micropatterns of positive guidance cues for the purpose of stimulating the growth of neurons. This method uses an oxidizing potential, applied to a micropattern of indium tin oxide in the presence of pyrrole and polyglutamic acid, to electrodeposit a matrix consisting of polypyrrole doped with polyglutamic acid. The resulting matrix subsequently can be modified with positive guidance cues via standard amide coupling reactions. Cells adhered to the micropatterned substrates can be stimulated electrically by the underlying electrodeposited matrix while they are in contact with positive guidance cues. This method can be extended to include both positive and negative guidance cues in a variety of combinations. To demonstrate the suitability of this method in the context of nerve guidance, dorsal root ganglia were grown in the presence of a micropatterned substrate whose surface was modified with molecules such as polylysine, laminin, or both. Cell adhesion and neurite extension were found to occur almost exclusively in areas where positive guidance cues were attached. This method is easy to execute and is of general utility for fundamental studies on the behavior of neurons in the presence of complex combinations of guidance cues as well as advanced bioelectronic devices such as neuronal networks.

Keywords
Electrochemistry; Laminin; Micropatterning; Nerve regeneration; Polypyrrole
First Page Preview
Micropatterns of positive guidance cues anchored to polypyrrole doped with polyglutamic acid: A new platform for characterizing neurite extension in complex environments
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 27, Issue 3, January 2006, Pages 473–484
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering