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Using a monoclonal antibody that recognizes specifically a high polysialylated form of N-CAM (high PSA N-CAM), the temporal and spatial expression of this molecule was studied in developing spinal cord and neural crest derivatives of mouse truncal region. Temporal expression was analyzed on immunoblots of spinal cord and dorsal root ganglia (DRGs) extracts(More)
In search of new markers for studying thymic and nervous system ontogeny, we raised rat monoclonal antibodies against glycosyl-phosphatidylinositol-anchored molecules among which larger groupings have been shown to be ectoenzymes and adhesion molecules. Two of these monoclonal antibodies (H193-4 and H194-563, IgG) were found to recognize(More)
Antibodies directed against neural cell adhesive molecules (NCAM) and in particular a monoclonal antibody recognizing polysialylated isoforms, were used to characterize the expression of these molecules in normal and diseased human muscles. Normal subjects as well as patients with inflammatory, dystrophic and denervating diseases were examined. By(More)
Human brain tissue shares alpha 2-8 linked polymers of neuraminic acid with the carbohydrates expressed on the capsule of group B Neisseria meningitidis bacteria (Finne et al. (1983) Lancet ii, 355-357; Finne (1985) Trends Biochem. Sci. 10, 129-132; Rougon et al. (1986) J. Cell. Biol. 103, 2429-2437). We report that sera from patients suffering from group B(More)
E14 rat cortical neurons which have almost no glial progenitors were cocultured with a homogeneous population of mature type 1 astrocytes at a 4/1 ratio in serum free medium. Maturation of neurons was evaluated using a set of well characterized antibodies and two new monoclonal antibodies (MN2E4 and MN3H6) raised against various neurofilament subunits and(More)
Neural cells seem to express a relatively low number of adhesion molecules at their surface. The hypothesis of cell surface modulation postulates that a repertoire of specificities and binding affinities might result from alteration over time of the amount, distribution or chemical properties of a particular kind of molecules. We are describing two(More)
Sol-gel derived glasses based on SiO 2-CaO were studied with and without Zn as doping element. Investigations of their in vitro bioactivity were performed by soaking the glass powders in biological fluids for time periods up to 4 days. The surface reactions were characterized at the micrometer scale and with a high level of efficiency for both major and(More)
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