Papers - Toda, Masahiro

GFAP transfected cells produce laminin, leading to neurite outgrowth promotion

Toda M., Asou H., Miura M., Toya S., Uyemura K.

NeuroReport 5 ( 15 ) 1969 - 1972 1994

ISSN  0959-4965

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<p>Accumulating evidence indicates the importance of astrocytes in neuronal development and regeneration. While glial fibrillary acidic protein (GFAP) is believed to mediate the morphology of developing astrocytes, its precise function remains unknown. To analyse the function of GFAP in astrocytes, we established GFAP-expressing cell lines by transfection of mouse GFAP cDNA into mouse fibroblast L cells. Stable transfectants expressed GFAP uniformly in the cytoplasm with no phenotypic changes and exhibited extended processes rich in GFAP. GFAP-expressing cells significantly promoted the neurite outgrowth of rat cerebral cortex neurones in the co-culture system. Analysis of the products of GFAP-expressing cells revealed an increase in production of laminin, but not fibronectin. These results suggest that L cells expressing GFAP increase laminin production, leading to promotion of neurite outgrowth.</p>

Molecular-Cloning of cDNA Encoding Human Drebrin E and Chromosomal Mapping of Its Gene

Toda M., Shirao T., Minoshima S., Shimizu N., Toya S., Uyemura K.

Biochemical and Biophysical Research Communications 196 ( 1 ) 468 - 472 1993.10

ISSN  0006-291X

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<p>Drebrins are novel actin-binding proteins in the brain which are developmentally regulated. Three isoforms: two embryonic types (El and E2) and an adult type (A) are generated by alternative RNA splicing from a single drebrin gene in the chicken brain. A full length cDNA clone of human drebrin E has been isolated from a cDNA library of human fetus brain. The clone is 2596 base pairs in length and contains an open reading frame of 1947 nucleotides encoding a protein of 649 amino acids. The deduced amino acid sequence, except for the internal 138-nucleotide sequence (ins2), exhibits 88% homology with rat drebrin A. Spot blot hybridization using flow-sorted human chromosomes provides evidence that the gene encoding human drebrin protein locates on human chromosome 5. © 1993 Academic Press. All rights reserved.</p>

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