PMID: 2505487Jan 1, 1989Paper

Influence of glycosaminoglycans on neurite morphology and outgrowth patterns in vitro

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
J M VernaR Saxod

Abstract

The neuritic growth patterns obtained on substrates made of several glycosaminoglycans (GAGs) bound to type I collagen were analysed and compared in primary cultures of chick embryo dorsal root ganglion grown in serum-free supplemented medium. In 2-day cultures grown on type I collagen or heparan sulphate (HS)-collagen surfaces, ganglionic explants exhibit a dense, symmetrical network of long, parallel neuritic processes and very few flat migrating non-neuronal cells. In contrast, on either dermatan sulphate (DS), chondroitin-6-sulphate (C6S) or hyaluronic acid (HA)-bound collagen substrates, neurons form irregular nerve fibre patterns; indeed, neurites follow convoluted paths and often, after abrupt turns, totally reverse their direction of extension. Experiments were carried out in which a choice was given to growing neural processes between collagen or GAG-collagen substrates. While growth cones elongating over type I collagen easily cross the border with HS-bound collagen surface and indiscriminately extend on this substrate, in contrast, neurites generally avoid surfaces coated with DS, C6S or HA and change their direction of growth in order to stay on collagen. The binding of DS, C6S or HA, but not HS, to type I collagen ...Continue Reading

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