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Developmental expression of MOSP in cultured oligodendrocytes
Authors:Qi-Qi Mu  Charissa Dyer
Institution:(1) Dept. of Biomedical Sciences, E.K. Shriver Center, 200 Trapelo Road, 02554 Waltham, MA
Abstract:Myelin/oligodendrocyte specific protein (MOSP) is a recently characterized 48 kDa surface membrane protein that is expressed exclusively by oligodendrocytes in the CNS. In this report, evidence is presented for the identification of the stage in the oligodendrocyte lineage when MOSP is first expressed. MOSP initially appears on immature oligodendrocytes about four to five days postnatal, which is about one to two days after the appearance of galactocerebroside and sulfatide. The initial expression of MOSP occurs at the stage in development when oligodendrocytes are elaborating processes and just beginning to form membrane sheets. Since 1) MOSP is capable of signaling increases in microtubular structures in oligodendrocytes and 2) microtubular structures may be essential for extension of growing processes and the formation of membrane sheaths, MOSP may play an important role in differentiation of oligodendrocytes and the formation of myelin.Special issue dedicated to Dr. Marjorie B. Lees.
Keywords:Oligodendrocyte lineage  cytoskeleton  differentiation  antibodies  cerebrosides
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