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Differential expression of alternatively spliced neural cell adhesion molecule l1 isoforms during oligodendrocyte maturation
Author(s) -
Itoh Kouichi,
Sakurai Yoko,
Asou Hiroaki,
Umeda Masato
Publication year - 2000
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/(sici)1097-4547(20000601)60:5<579::aid-jnr2>3.0.co;2-#
Subject(s) - neural cell adhesion molecule , oligodendrocyte , gene isoform , cell adhesion molecule , l1 , microbiology and biotechnology , differential (mechanical device) , neural cell , neuroscience , neural development , biology , cell adhesion , chemistry , cell , myelin , physics , central nervous system , biochemistry , gene , thermodynamics
The expression of neural cell adhesion molecules and myelin‐specific molecules is precisely regulated according to cell type and developmental age. We investigated whether different isoforms of these molecules change during development of oligodendrocytes. Immature oligodendrocytes cultured from embryonic day 18 rat cerebrum were distinguished into early stage and late stage by morphological and immunocytochemical criteria. mRNA levels of the neural cell adhesion molecule L1 in late‐stage immature oligodendrocytes were approximately fivefold higher than in early‐stage cells, but early‐stage immature oligodendrocytes predominantly expressed an L1 spliced isoform lacking two region (exon 2 and 27). Late‐stage cells expressed full‐length L1 identical to the neuronal form. mRNA for the neural cell adhesion molecules NCAM and MAG did not show any difference in expression pattern. These results suggest that alternatively spliced isoforms of L1 might be regulated by temporal and spatial factors during oligodendrocyte development. J. Neurosci. Res. 60:579–586, 2000 © 2000 Wiley‐Liss, Inc.