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The differential influence of colocalized and segregated dual protein signals on neurite outgrowth on surfaces

Paper ID Volume ID Publish Year Pages File Format Full-Text
10068 662 2007 13 PDF Available
Title
The differential influence of colocalized and segregated dual protein signals on neurite outgrowth on surfaces
Abstract

We present an in vitro micropatterning approach in which the density and spatial presentation of two separate protein layers can be independently controlled to form cell stripe assays through (1) the simultaneous application of microcontact printing (μCP) and microfluidic network (μFN) patterning to generate alternating stripes of pure single protein layers or (2) through μCP onto a pre-adsorbed homogeneous protein layer to generate alternating single and dual protein stripes. This approach enabled the creation of choice boundaries in which protein–protein interactions were limited and the effects of spatially segregated or colocalized dual protein signals on model primary neuronal behavior could be readily interrogated and compared on both glass and tissue culture polystyrene substrates. Dorsal root ganglion (DRG) cell body attachment was dictated largely by non-specific cell adhesion interactions and interactions between the guidance molecules laminin and aggrecan were insufficient to explain aggrecan inhibition on neurite outgrowth. The presentation of a specific laminin epitope stabilized by interactions with aggrecan and destabilized by μCP was a strong predictor of neurite promoting activity. These observations provide evidence that aggrecan is intrinsically inhibitory and that laminin–aggrecan interactions do not diminish laminin growth promoting properties.

Keywords
Nerve regeneration; Micropatterning; Integrin; Laminin; Chondroitin sulfate; Cell adhesion
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The differential influence of colocalized and segregated dual protein signals on neurite outgrowth on surfaces
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 28, Issue 16, June 2007, Pages 2590–2602
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us