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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents



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ID: 28702.0, MPI für Polymerforschung / MPI Polymerforschung
Electrophysiological recordings of patterned rat brain stem slice neurons
Authors:Lauer, L.; Vogt, A.; Yeung, C. K.; Knoll, Wolfgang; Offenhäusser, Andreas
Language:English
Date of Publication (YYYY-MM-DD):2002-08
Title of Journal:Biomaterials
Journal Abbrev.:Biomaterials
Volume:23
Issue / Number:15
Start Page:3123
End Page:3130
Review Status:No review
Audience:Not Specified
Abstract / Description:Dissociated neuronal Cultures on substrates patterned with extracellular matrix (ECM) proteins have yielded much information in the past. However, although the culture of brain slices has many advantages over dissociated neuronal cultures, its feasibility on patterned substrates has not been demonstrated to date. In the present study, neuronal outgrowth from brain stem slices onto homogeneous Control substrates, and onto laminin Structures of grid- and line-shape was achieved. Cultures were evaluated by means of phase contrast microscopy, antibody staining, and patch-clamp measurements. Only patterns with line sizes of more than 4mum yielded satisfactory neuronal outgrowth. The size of the nodes in the pattern influenced the nodal compliance of the spreading cells and the amount of unstructured overgrowth. Best grid patterns were 4 pin lines and 10 pin nodes, best line patterns were 4 pin lines and 20 mum nodes. On patterned substrates, average sodium and potassium currents were reduced by similar to50% compared to controls, whereas area-normalized ion-currents were in the same order of magnitude. This indicates that as a consequence of the pattern-enforced geometrical confinement, neurons tend to have a smaller surface. In addition, neurons on patterned substrates were rapidly covered with glial overgrowth. This was shown by antibody staining. (C) 2002 Published by Elsevier Science Ltd.
Free Keywords:brain slices cultures; cell migration; micro-contact printing; laminin; patterned substrates; electrophysiology
Comment of the Author/Creator:Date: 2002, AUG
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Forschungszentrum Julich GMBH, ISG 2, D-52425 Julich, Germany
Identifiers:ISI:000176268800007 [ID No:1]
ISSN:0142-9612 [ID No:2]
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