PMID: 6398831Dec 1, 1984Paper

Nonmyelin-forming Schwann cells coexpress surface proteins and intermediate filaments not found in myelin-forming cells: a study of Ran-2, A5E3 antigen and glial fibrillary acidic protein

Journal of Neurocytology
K R Jessen, R Mirsky

Abstract

Little is known about the molecular properties of the nonmyelin-forming glia of the P.N.S. In addition, the relationship between these cells and C.N.S. glia is poorly understood, in contrast with the well-documented biochemical and functional similarities between myelin-forming Schwann cells and oligodendrocytes. We have shown elsewhere that two cell surface proteins found on astrocytes, Ran-2 and A5E3 antigen, and the intermediate filament protein, glial fibrillary acidic protein (GFAP), are all widely expressed in situ by nonmyelin-forming Schwann cells in various nerves from adult rats, but not by myelin-forming Schwann cells. Here we investigate whether these three proteins are exclusively coexpressed by the same population of Schwann cells in situ in adult nerves, or alternatively whether subpopulations of nonmyelin-forming Schwann cells can be defined that express one or two, but not all three of these antigens. The distribution of two surface proteins, Ran-2 and A5E3 antigen, both defined by monoclonal antibodies, is compared with the distribution of the intracellular intermediate filament protein GFAP in peripheral nerve trunks of adult rats using double label immunofluorescence. It is clear that the expression of all t...Continue Reading

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