Abstract
A procedure was developed for the cultivation of cells derived from the cerebral hemispheres of the 21-day old rat. Approximately 98 percent of the cells in a 10 day culture are astrocytes that contain glial fibrillary acidic protein. Analysis of the extracted gangliosides by thin layer chromatography revealed that ganglioside GM1 was absent and that the predominant ganglioside was GM3. Very small amounts of the polysialogangliosides GD1a, GD1b, and GT1b were detected. The concentration of gangliosidic NeuNAc per mg protein in these astrocytes was only 3 percent that observed in the 5 day culture of a mixed cell preparation from newborn rat brain. Immunohistochemical and histochemical studies were performed on the mixed cell population of the minced tissue of 21-day old rat brain prior to cultivation. Astrocytes did not stain for hyaluronectin. These cells also did not provide a positive staining reaction for ganglioside GM1 utilizing the antiganglioside GM1 peroxidase-antiperoxidase procedure and the biotinylated choleragen-avidin-peroxidase procedure. These two histochemical methods for ganglioside GM1 also did not stain astrocytes that had been cultured for 5 days. Oligodendroglial cells, which were also present in the uncultured 21-day-old minced brain tissue, stasined positively for ganglioside GM1 and hyaluronectin. Hyaluronectin had previously been shown to be a marker for oligodendroglia. Oligodendroglial cells which were present in the 5 day cultures of 21-day old brain tissue also provided a positive reaction for ganglioside GM1. It is concluded that ganglioside GM1 is absent in astroglia. The presence of small amounts of polysialogangliosides in the “pure” astrocyte preparation is discussed.
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Asou, H., Brunngraber, E.G. Absence of ganglioside GM1 in astroglial cells from 21-day old rat brain: Immunohistochemical, histochemical, and biochemical studies. Neurochem Res 8, 1045–1057 (1983). https://doi.org/10.1007/BF00965199
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DOI: https://doi.org/10.1007/BF00965199