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- W2045864970 abstract "Neurofilament protein expression was examined immunochemically in a neuronal cell line derived from postnatal day 21 septal tissue. The SN48.1p cell line was found to constitutively synthesize an array of neurofilament proteins typical of a mature neuron. All three neurofilament subunits (NF-L, NF-M, and NF-H) as well as differentially phosphorylated isoforms (P-, P+, P++, and P+++) of NF-M and NF-H were identified by immunoblot analysis. Immunofluorescene, studies revealedthat the neurofilament proteins were components of discrete, filamentous structures. Abnormal intracellular aggregations of neurofilament proteins were never observed. Some SN48.1p cells apportioned specific isoforms into selected intracellular regions based on the molecular weight and phosphorylation level of the protein. NF-L was preferentially localized to perikarya and proximal neurites; NF-M[P++] and NF-H[P+++] were distributed to distal aspects of neurites. The expression of these differentiated features of neurofilament proteins and, presumably, the synthesis of the kinases and phosphatases required for normal neurofilament metabolism occurred in the absence of growth factors, differentiating agents, and specialized culture substrates. In addition, the non-neuronal intermediate filaments glial fibrillary acidic protein and epithelial cytokeratin proteins were absent. These data demonstrate that SN48.1p cells exhibit a neurofilament phenotype characteristic of mature neurons and provide a unique model to examine the expression and function of neurofilaments in differentiated neuronal cells." @default.
- W2045864970 created "2016-06-24" @default.
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- W2045864970 date "1991-09-01" @default.
- W2045864970 modified "2023-09-26" @default.
- W2045864970 title "Constitutive expression of the mature array of neurofilament proteins by a CNS neuronal cell line" @default.
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- W2045864970 doi "https://doi.org/10.1016/0006-8993(91)90769-r" @default.
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