PMID: 11343834May 10, 2001Paper

Survival and neurite outgrowth of rat cortical neurons in three-dimensional agarose and collagen gel matrices

Neuroscience Letters
S M O'ConnorW Ma

Abstract

To better understand interactions between neurons and extracellular matrix equivalents, embryonic day-18 rat cortical neurons were immobilized and maintained in culture for up to 24 days in agarose and type I collagen gels. Using live/dead staining, neuronal cultures in low density collagen gel lasted at least 3 weeks. At 14 days, over 50% of immobilized cells in collagen gel were found viable while in low density agarose gel no cells survived. In situ cell death detection showed that most, if not all, dead cells in either of the gels underwent apoptosis. The collagen-trapped neurons exhibited normal neuronal polarity and developed long neurites, estimated at over 500 microm. The results suggest that collagen, because it is a major extracellular matrix constituent, suppresses apoptosis and provides a suitable substrate for neuronal survival and differentiation.

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